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https://github.com/git/git
synced 2024-08-25 02:35:46 +00:00
![Junio C Hamano](/assets/img/avatar_default.png)
Platform-specific code that determines if a directory is OK to use as a repository has been taught to report more details, especially on Windows. * js/safe-directory-plus: mingw: handle a file owned by the Administrators group correctly mingw: be more informative when ownership check fails on FAT32 mingw: provide details about unsafe directories' ownership setup: prepare for more detailed "dubious ownership" messages setup: fix some formatting
3093 lines
79 KiB
C
3093 lines
79 KiB
C
#include "../git-compat-util.h"
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#include "win32.h"
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#include <aclapi.h>
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#include <sddl.h>
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#include <conio.h>
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#include <wchar.h>
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#include "../strbuf.h"
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#include "../run-command.h"
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#include "../cache.h"
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#include "win32/lazyload.h"
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#include "../config.h"
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#include "dir.h"
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#define SECURITY_WIN32
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#include <sspi.h>
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#define HCAST(type, handle) ((type)(intptr_t)handle)
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static const int delay[] = { 0, 1, 10, 20, 40 };
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void open_in_gdb(void)
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{
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static struct child_process cp = CHILD_PROCESS_INIT;
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extern char *_pgmptr;
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strvec_pushl(&cp.args, "mintty", "gdb", NULL);
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strvec_pushf(&cp.args, "--pid=%d", getpid());
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cp.clean_on_exit = 1;
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if (start_command(&cp) < 0)
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die_errno("Could not start gdb");
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sleep(1);
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}
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int err_win_to_posix(DWORD winerr)
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{
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int error = ENOSYS;
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switch(winerr) {
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case ERROR_ACCESS_DENIED: error = EACCES; break;
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case ERROR_ACCOUNT_DISABLED: error = EACCES; break;
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case ERROR_ACCOUNT_RESTRICTION: error = EACCES; break;
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case ERROR_ALREADY_ASSIGNED: error = EBUSY; break;
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case ERROR_ALREADY_EXISTS: error = EEXIST; break;
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case ERROR_ARITHMETIC_OVERFLOW: error = ERANGE; break;
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case ERROR_BAD_COMMAND: error = EIO; break;
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case ERROR_BAD_DEVICE: error = ENODEV; break;
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case ERROR_BAD_DRIVER_LEVEL: error = ENXIO; break;
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case ERROR_BAD_EXE_FORMAT: error = ENOEXEC; break;
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case ERROR_BAD_FORMAT: error = ENOEXEC; break;
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case ERROR_BAD_LENGTH: error = EINVAL; break;
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case ERROR_BAD_PATHNAME: error = ENOENT; break;
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case ERROR_BAD_PIPE: error = EPIPE; break;
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case ERROR_BAD_UNIT: error = ENODEV; break;
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case ERROR_BAD_USERNAME: error = EINVAL; break;
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case ERROR_BROKEN_PIPE: error = EPIPE; break;
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case ERROR_BUFFER_OVERFLOW: error = ENAMETOOLONG; break;
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case ERROR_BUSY: error = EBUSY; break;
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case ERROR_BUSY_DRIVE: error = EBUSY; break;
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case ERROR_CALL_NOT_IMPLEMENTED: error = ENOSYS; break;
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case ERROR_CANNOT_MAKE: error = EACCES; break;
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case ERROR_CANTOPEN: error = EIO; break;
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case ERROR_CANTREAD: error = EIO; break;
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case ERROR_CANTWRITE: error = EIO; break;
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case ERROR_CRC: error = EIO; break;
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case ERROR_CURRENT_DIRECTORY: error = EACCES; break;
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case ERROR_DEVICE_IN_USE: error = EBUSY; break;
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case ERROR_DEV_NOT_EXIST: error = ENODEV; break;
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case ERROR_DIRECTORY: error = EINVAL; break;
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case ERROR_DIR_NOT_EMPTY: error = ENOTEMPTY; break;
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case ERROR_DISK_CHANGE: error = EIO; break;
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case ERROR_DISK_FULL: error = ENOSPC; break;
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case ERROR_DRIVE_LOCKED: error = EBUSY; break;
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case ERROR_ENVVAR_NOT_FOUND: error = EINVAL; break;
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case ERROR_EXE_MARKED_INVALID: error = ENOEXEC; break;
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case ERROR_FILENAME_EXCED_RANGE: error = ENAMETOOLONG; break;
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case ERROR_FILE_EXISTS: error = EEXIST; break;
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case ERROR_FILE_INVALID: error = ENODEV; break;
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case ERROR_FILE_NOT_FOUND: error = ENOENT; break;
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case ERROR_GEN_FAILURE: error = EIO; break;
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case ERROR_HANDLE_DISK_FULL: error = ENOSPC; break;
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case ERROR_INSUFFICIENT_BUFFER: error = ENOMEM; break;
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case ERROR_INVALID_ACCESS: error = EACCES; break;
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case ERROR_INVALID_ADDRESS: error = EFAULT; break;
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case ERROR_INVALID_BLOCK: error = EFAULT; break;
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case ERROR_INVALID_DATA: error = EINVAL; break;
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case ERROR_INVALID_DRIVE: error = ENODEV; break;
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case ERROR_INVALID_EXE_SIGNATURE: error = ENOEXEC; break;
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case ERROR_INVALID_FLAGS: error = EINVAL; break;
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case ERROR_INVALID_FUNCTION: error = ENOSYS; break;
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case ERROR_INVALID_HANDLE: error = EBADF; break;
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case ERROR_INVALID_LOGON_HOURS: error = EACCES; break;
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case ERROR_INVALID_NAME: error = EINVAL; break;
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case ERROR_INVALID_OWNER: error = EINVAL; break;
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case ERROR_INVALID_PARAMETER: error = EINVAL; break;
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case ERROR_INVALID_PASSWORD: error = EPERM; break;
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case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break;
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case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break;
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case ERROR_INVALID_TARGET_HANDLE: error = EIO; break;
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case ERROR_INVALID_WORKSTATION: error = EACCES; break;
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case ERROR_IO_DEVICE: error = EIO; break;
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case ERROR_IO_INCOMPLETE: error = EINTR; break;
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case ERROR_LOCKED: error = EBUSY; break;
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case ERROR_LOCK_VIOLATION: error = EACCES; break;
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case ERROR_LOGON_FAILURE: error = EACCES; break;
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case ERROR_MAPPED_ALIGNMENT: error = EINVAL; break;
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case ERROR_META_EXPANSION_TOO_LONG: error = E2BIG; break;
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case ERROR_MORE_DATA: error = EPIPE; break;
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case ERROR_NEGATIVE_SEEK: error = ESPIPE; break;
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case ERROR_NOACCESS: error = EFAULT; break;
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case ERROR_NONE_MAPPED: error = EINVAL; break;
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case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break;
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case ERROR_NOT_READY: error = EAGAIN; break;
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case ERROR_NOT_SAME_DEVICE: error = EXDEV; break;
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case ERROR_NO_DATA: error = EPIPE; break;
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case ERROR_NO_MORE_SEARCH_HANDLES: error = EIO; break;
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case ERROR_NO_PROC_SLOTS: error = EAGAIN; break;
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case ERROR_NO_SUCH_PRIVILEGE: error = EACCES; break;
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case ERROR_OPEN_FAILED: error = EIO; break;
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case ERROR_OPEN_FILES: error = EBUSY; break;
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case ERROR_OPERATION_ABORTED: error = EINTR; break;
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case ERROR_OUTOFMEMORY: error = ENOMEM; break;
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case ERROR_PASSWORD_EXPIRED: error = EACCES; break;
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case ERROR_PATH_BUSY: error = EBUSY; break;
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case ERROR_PATH_NOT_FOUND: error = ENOENT; break;
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case ERROR_PIPE_BUSY: error = EBUSY; break;
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case ERROR_PIPE_CONNECTED: error = EPIPE; break;
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case ERROR_PIPE_LISTENING: error = EPIPE; break;
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case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break;
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case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break;
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case ERROR_READ_FAULT: error = EIO; break;
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case ERROR_SEEK: error = EIO; break;
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case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break;
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case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break;
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case ERROR_SHARING_VIOLATION: error = EACCES; break;
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case ERROR_STACK_OVERFLOW: error = ENOMEM; break;
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case ERROR_SUCCESS: BUG("err_win_to_posix() called without an error!");
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case ERROR_SWAPERROR: error = ENOENT; break;
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case ERROR_TOO_MANY_MODULES: error = EMFILE; break;
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case ERROR_TOO_MANY_OPEN_FILES: error = EMFILE; break;
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case ERROR_UNRECOGNIZED_MEDIA: error = ENXIO; break;
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case ERROR_UNRECOGNIZED_VOLUME: error = ENODEV; break;
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case ERROR_WAIT_NO_CHILDREN: error = ECHILD; break;
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case ERROR_WRITE_FAULT: error = EIO; break;
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case ERROR_WRITE_PROTECT: error = EROFS; break;
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}
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return error;
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}
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static inline int is_file_in_use_error(DWORD errcode)
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{
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switch (errcode) {
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case ERROR_SHARING_VIOLATION:
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case ERROR_ACCESS_DENIED:
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return 1;
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}
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return 0;
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}
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static int read_yes_no_answer(void)
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{
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char answer[1024];
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if (fgets(answer, sizeof(answer), stdin)) {
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size_t answer_len = strlen(answer);
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int got_full_line = 0, c;
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/* remove the newline */
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if (answer_len >= 2 && answer[answer_len-2] == '\r') {
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answer[answer_len-2] = '\0';
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got_full_line = 1;
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} else if (answer_len >= 1 && answer[answer_len-1] == '\n') {
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answer[answer_len-1] = '\0';
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got_full_line = 1;
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}
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/* flush the buffer in case we did not get the full line */
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if (!got_full_line)
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while ((c = getchar()) != EOF && c != '\n')
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;
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} else
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/* we could not read, return the
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* default answer which is no */
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return 0;
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if (tolower(answer[0]) == 'y' && !answer[1])
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return 1;
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if (!strncasecmp(answer, "yes", sizeof(answer)))
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return 1;
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if (tolower(answer[0]) == 'n' && !answer[1])
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return 0;
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if (!strncasecmp(answer, "no", sizeof(answer)))
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return 0;
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/* did not find an answer we understand */
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return -1;
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}
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static int ask_yes_no_if_possible(const char *format, ...)
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{
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char question[4096];
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const char *retry_hook[] = { NULL, NULL, NULL };
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va_list args;
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va_start(args, format);
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vsnprintf(question, sizeof(question), format, args);
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va_end(args);
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if ((retry_hook[0] = mingw_getenv("GIT_ASK_YESNO"))) {
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retry_hook[1] = question;
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return !run_command_v_opt(retry_hook, 0);
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}
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if (!isatty(_fileno(stdin)) || !isatty(_fileno(stderr)))
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return 0;
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while (1) {
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int answer;
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fprintf(stderr, "%s (y/n) ", question);
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if ((answer = read_yes_no_answer()) >= 0)
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return answer;
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fprintf(stderr, "Sorry, I did not understand your answer. "
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"Please type 'y' or 'n'\n");
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}
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}
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/* Windows only */
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enum hide_dotfiles_type {
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HIDE_DOTFILES_FALSE = 0,
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HIDE_DOTFILES_TRUE,
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HIDE_DOTFILES_DOTGITONLY
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};
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static int core_restrict_inherited_handles = -1;
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static enum hide_dotfiles_type hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
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static char *unset_environment_variables;
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int mingw_core_config(const char *var, const char *value, void *cb)
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{
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if (!strcmp(var, "core.hidedotfiles")) {
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if (value && !strcasecmp(value, "dotgitonly"))
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hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
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else
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hide_dotfiles = git_config_bool(var, value);
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return 0;
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}
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if (!strcmp(var, "core.unsetenvvars")) {
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free(unset_environment_variables);
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unset_environment_variables = xstrdup(value);
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return 0;
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}
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if (!strcmp(var, "core.restrictinheritedhandles")) {
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if (value && !strcasecmp(value, "auto"))
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core_restrict_inherited_handles = -1;
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else
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core_restrict_inherited_handles =
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git_config_bool(var, value);
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return 0;
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}
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return 0;
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}
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/* Normalizes NT paths as returned by some low-level APIs. */
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static wchar_t *normalize_ntpath(wchar_t *wbuf)
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{
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int i;
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/* fix absolute path prefixes */
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if (wbuf[0] == '\\') {
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/* strip NT namespace prefixes */
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if (!wcsncmp(wbuf, L"\\??\\", 4) ||
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!wcsncmp(wbuf, L"\\\\?\\", 4))
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wbuf += 4;
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else if (!wcsnicmp(wbuf, L"\\DosDevices\\", 12))
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wbuf += 12;
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/* replace remaining '...UNC\' with '\\' */
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if (!wcsnicmp(wbuf, L"UNC\\", 4)) {
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wbuf += 2;
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*wbuf = '\\';
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}
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}
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/* convert backslashes to slashes */
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for (i = 0; wbuf[i]; i++)
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if (wbuf[i] == '\\')
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wbuf[i] = '/';
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return wbuf;
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}
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int mingw_unlink(const char *pathname)
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{
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int ret, tries = 0;
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wchar_t wpathname[MAX_PATH];
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if (xutftowcs_path(wpathname, pathname) < 0)
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return -1;
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if (DeleteFileW(wpathname))
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return 0;
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/* read-only files cannot be removed */
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_wchmod(wpathname, 0666);
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while ((ret = _wunlink(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
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if (!is_file_in_use_error(GetLastError()))
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break;
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/*
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* We assume that some other process had the source or
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* destination file open at the wrong moment and retry.
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* In order to give the other process a higher chance to
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* complete its operation, we give up our time slice now.
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* If we have to retry again, we do sleep a bit.
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*/
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Sleep(delay[tries]);
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tries++;
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}
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while (ret == -1 && is_file_in_use_error(GetLastError()) &&
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ask_yes_no_if_possible("Unlink of file '%s' failed. "
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"Should I try again?", pathname))
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ret = _wunlink(wpathname);
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return ret;
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}
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static int is_dir_empty(const wchar_t *wpath)
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{
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WIN32_FIND_DATAW findbuf;
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HANDLE handle;
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wchar_t wbuf[MAX_PATH + 2];
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wcscpy(wbuf, wpath);
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wcscat(wbuf, L"\\*");
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handle = FindFirstFileW(wbuf, &findbuf);
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if (handle == INVALID_HANDLE_VALUE)
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return GetLastError() == ERROR_NO_MORE_FILES;
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while (!wcscmp(findbuf.cFileName, L".") ||
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!wcscmp(findbuf.cFileName, L".."))
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if (!FindNextFileW(handle, &findbuf)) {
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DWORD err = GetLastError();
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FindClose(handle);
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return err == ERROR_NO_MORE_FILES;
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}
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FindClose(handle);
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return 0;
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}
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int mingw_rmdir(const char *pathname)
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{
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int ret, tries = 0;
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wchar_t wpathname[MAX_PATH];
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struct stat st;
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/*
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* Contrary to Linux' `rmdir()`, Windows' _wrmdir() and _rmdir()
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* (and `RemoveDirectoryW()`) will attempt to remove the target of a
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* symbolic link (if it points to a directory).
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*
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* This behavior breaks the assumption of e.g. `remove_path()` which
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* upon successful deletion of a file will attempt to remove its parent
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* directories recursively until failure (which usually happens when
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* the directory is not empty).
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*
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* Therefore, before calling `_wrmdir()`, we first check if the path is
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* a symbolic link. If it is, we exit and return the same error as
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* Linux' `rmdir()` would, i.e. `ENOTDIR`.
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*/
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if (!mingw_lstat(pathname, &st) && S_ISLNK(st.st_mode)) {
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errno = ENOTDIR;
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return -1;
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}
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if (xutftowcs_path(wpathname, pathname) < 0)
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return -1;
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while ((ret = _wrmdir(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
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if (!is_file_in_use_error(GetLastError()))
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errno = err_win_to_posix(GetLastError());
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if (errno != EACCES)
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break;
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if (!is_dir_empty(wpathname)) {
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errno = ENOTEMPTY;
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break;
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}
|
|
/*
|
|
* We assume that some other process had the source or
|
|
* destination file open at the wrong moment and retry.
|
|
* In order to give the other process a higher chance to
|
|
* complete its operation, we give up our time slice now.
|
|
* If we have to retry again, we do sleep a bit.
|
|
*/
|
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Sleep(delay[tries]);
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tries++;
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}
|
|
while (ret == -1 && errno == EACCES && is_file_in_use_error(GetLastError()) &&
|
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ask_yes_no_if_possible("Deletion of directory '%s' failed. "
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|
"Should I try again?", pathname))
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ret = _wrmdir(wpathname);
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|
if (!ret)
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invalidate_lstat_cache();
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return ret;
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|
}
|
|
|
|
static inline int needs_hiding(const char *path)
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|
{
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const char *basename;
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|
|
|
if (hide_dotfiles == HIDE_DOTFILES_FALSE)
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return 0;
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|
|
|
/* We cannot use basename(), as it would remove trailing slashes */
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|
win32_skip_dos_drive_prefix((char **)&path);
|
|
if (!*path)
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return 0;
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|
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|
for (basename = path; *path; path++)
|
|
if (is_dir_sep(*path)) {
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do {
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path++;
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|
} while (is_dir_sep(*path));
|
|
/* ignore trailing slashes */
|
|
if (*path)
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basename = path;
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else
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break;
|
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}
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|
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if (hide_dotfiles == HIDE_DOTFILES_TRUE)
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return *basename == '.';
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|
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assert(hide_dotfiles == HIDE_DOTFILES_DOTGITONLY);
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return !strncasecmp(".git", basename, 4) &&
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(!basename[4] || is_dir_sep(basename[4]));
|
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}
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|
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static int set_hidden_flag(const wchar_t *path, int set)
|
|
{
|
|
DWORD original = GetFileAttributesW(path), modified;
|
|
if (set)
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modified = original | FILE_ATTRIBUTE_HIDDEN;
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else
|
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modified = original & ~FILE_ATTRIBUTE_HIDDEN;
|
|
if (original == modified || SetFileAttributesW(path, modified))
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return 0;
|
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errno = err_win_to_posix(GetLastError());
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return -1;
|
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}
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|
|
int mingw_mkdir(const char *path, int mode)
|
|
{
|
|
int ret;
|
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wchar_t wpath[MAX_PATH];
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|
|
|
if (!is_valid_win32_path(path, 0)) {
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
|
|
if (xutftowcs_path(wpath, path) < 0)
|
|
return -1;
|
|
ret = _wmkdir(wpath);
|
|
if (!ret && needs_hiding(path))
|
|
return set_hidden_flag(wpath, 1);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Calling CreateFile() using FILE_APPEND_DATA and without FILE_WRITE_DATA
|
|
* is documented in [1] as opening a writable file handle in append mode.
|
|
* (It is believed that) this is atomic since it is maintained by the
|
|
* kernel unlike the O_APPEND flag which is racily maintained by the CRT.
|
|
*
|
|
* [1] https://docs.microsoft.com/en-us/windows/desktop/fileio/file-access-rights-constants
|
|
*
|
|
* This trick does not appear to work for named pipes. Instead it creates
|
|
* a named pipe client handle that cannot be written to. Callers should
|
|
* just use the regular _wopen() for them. (And since client handle gets
|
|
* bound to a unique server handle, it isn't really an issue.)
|
|
*/
|
|
static int mingw_open_append(wchar_t const *wfilename, int oflags, ...)
|
|
{
|
|
HANDLE handle;
|
|
int fd;
|
|
DWORD create = (oflags & O_CREAT) ? OPEN_ALWAYS : OPEN_EXISTING;
|
|
|
|
/* only these flags are supported */
|
|
if ((oflags & ~O_CREAT) != (O_WRONLY | O_APPEND))
|
|
return errno = ENOSYS, -1;
|
|
|
|
/*
|
|
* FILE_SHARE_WRITE is required to permit child processes
|
|
* to append to the file.
|
|
*/
|
|
handle = CreateFileW(wfilename, FILE_APPEND_DATA,
|
|
FILE_SHARE_WRITE | FILE_SHARE_READ,
|
|
NULL, create, FILE_ATTRIBUTE_NORMAL, NULL);
|
|
if (handle == INVALID_HANDLE_VALUE) {
|
|
DWORD err = GetLastError();
|
|
|
|
/*
|
|
* Some network storage solutions (e.g. Isilon) might return
|
|
* ERROR_INVALID_PARAMETER instead of expected error
|
|
* ERROR_PATH_NOT_FOUND, which results in an unknown error. If
|
|
* so, let's turn the error to ERROR_PATH_NOT_FOUND instead.
|
|
*/
|
|
if (err == ERROR_INVALID_PARAMETER)
|
|
err = ERROR_PATH_NOT_FOUND;
|
|
|
|
errno = err_win_to_posix(err);
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* No O_APPEND here, because the CRT uses it only to reset the
|
|
* file pointer to EOF before each write(); but that is not
|
|
* necessary (and may lead to races) for a file created with
|
|
* FILE_APPEND_DATA.
|
|
*/
|
|
fd = _open_osfhandle((intptr_t)handle, O_BINARY);
|
|
if (fd < 0)
|
|
CloseHandle(handle);
|
|
return fd;
|
|
}
|
|
|
|
/*
|
|
* Does the pathname map to the local named pipe filesystem?
|
|
* That is, does it have a "//./pipe/" prefix?
|
|
*/
|
|
static int is_local_named_pipe_path(const char *filename)
|
|
{
|
|
return (is_dir_sep(filename[0]) &&
|
|
is_dir_sep(filename[1]) &&
|
|
filename[2] == '.' &&
|
|
is_dir_sep(filename[3]) &&
|
|
!strncasecmp(filename+4, "pipe", 4) &&
|
|
is_dir_sep(filename[8]) &&
|
|
filename[9]);
|
|
}
|
|
|
|
int mingw_open (const char *filename, int oflags, ...)
|
|
{
|
|
typedef int (*open_fn_t)(wchar_t const *wfilename, int oflags, ...);
|
|
va_list args;
|
|
unsigned mode;
|
|
int fd, create = (oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL);
|
|
wchar_t wfilename[MAX_PATH];
|
|
open_fn_t open_fn;
|
|
|
|
va_start(args, oflags);
|
|
mode = va_arg(args, int);
|
|
va_end(args);
|
|
|
|
if (!is_valid_win32_path(filename, !create)) {
|
|
errno = create ? EINVAL : ENOENT;
|
|
return -1;
|
|
}
|
|
|
|
if ((oflags & O_APPEND) && !is_local_named_pipe_path(filename))
|
|
open_fn = mingw_open_append;
|
|
else
|
|
open_fn = _wopen;
|
|
|
|
if (filename && !strcmp(filename, "/dev/null"))
|
|
wcscpy(wfilename, L"nul");
|
|
else if (xutftowcs_path(wfilename, filename) < 0)
|
|
return -1;
|
|
|
|
fd = open_fn(wfilename, oflags, mode);
|
|
|
|
if (fd < 0 && (oflags & O_ACCMODE) != O_RDONLY && errno == EACCES) {
|
|
DWORD attrs = GetFileAttributesW(wfilename);
|
|
if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
|
|
errno = EISDIR;
|
|
}
|
|
if ((oflags & O_CREAT) && needs_hiding(filename)) {
|
|
/*
|
|
* Internally, _wopen() uses the CreateFile() API which errors
|
|
* out with an ERROR_ACCESS_DENIED if CREATE_ALWAYS was
|
|
* specified and an already existing file's attributes do not
|
|
* match *exactly*. As there is no mode or flag we can set that
|
|
* would correspond to FILE_ATTRIBUTE_HIDDEN, let's just try
|
|
* again *without* the O_CREAT flag (that corresponds to the
|
|
* CREATE_ALWAYS flag of CreateFile()).
|
|
*/
|
|
if (fd < 0 && errno == EACCES)
|
|
fd = open_fn(wfilename, oflags & ~O_CREAT, mode);
|
|
if (fd >= 0 && set_hidden_flag(wfilename, 1))
|
|
warning("could not mark '%s' as hidden.", filename);
|
|
}
|
|
return fd;
|
|
}
|
|
|
|
static BOOL WINAPI ctrl_ignore(DWORD type)
|
|
{
|
|
return TRUE;
|
|
}
|
|
|
|
#undef fgetc
|
|
int mingw_fgetc(FILE *stream)
|
|
{
|
|
int ch;
|
|
if (!isatty(_fileno(stream)))
|
|
return fgetc(stream);
|
|
|
|
SetConsoleCtrlHandler(ctrl_ignore, TRUE);
|
|
while (1) {
|
|
ch = fgetc(stream);
|
|
if (ch != EOF || GetLastError() != ERROR_OPERATION_ABORTED)
|
|
break;
|
|
|
|
/* Ctrl+C was pressed, simulate SIGINT and retry */
|
|
mingw_raise(SIGINT);
|
|
}
|
|
SetConsoleCtrlHandler(ctrl_ignore, FALSE);
|
|
return ch;
|
|
}
|
|
|
|
#undef fopen
|
|
FILE *mingw_fopen (const char *filename, const char *otype)
|
|
{
|
|
int hide = needs_hiding(filename);
|
|
FILE *file;
|
|
wchar_t wfilename[MAX_PATH], wotype[4];
|
|
if (filename && !strcmp(filename, "/dev/null"))
|
|
wcscpy(wfilename, L"nul");
|
|
else if (!is_valid_win32_path(filename, 1)) {
|
|
int create = otype && strchr(otype, 'w');
|
|
errno = create ? EINVAL : ENOENT;
|
|
return NULL;
|
|
} else if (xutftowcs_path(wfilename, filename) < 0)
|
|
return NULL;
|
|
|
|
if (xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
|
|
return NULL;
|
|
|
|
if (hide && !access(filename, F_OK) && set_hidden_flag(wfilename, 0)) {
|
|
error("could not unhide %s", filename);
|
|
return NULL;
|
|
}
|
|
file = _wfopen(wfilename, wotype);
|
|
if (!file && GetLastError() == ERROR_INVALID_NAME)
|
|
errno = ENOENT;
|
|
if (file && hide && set_hidden_flag(wfilename, 1))
|
|
warning("could not mark '%s' as hidden.", filename);
|
|
return file;
|
|
}
|
|
|
|
FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
|
|
{
|
|
int hide = needs_hiding(filename);
|
|
FILE *file;
|
|
wchar_t wfilename[MAX_PATH], wotype[4];
|
|
if (filename && !strcmp(filename, "/dev/null"))
|
|
wcscpy(wfilename, L"nul");
|
|
else if (!is_valid_win32_path(filename, 1)) {
|
|
int create = otype && strchr(otype, 'w');
|
|
errno = create ? EINVAL : ENOENT;
|
|
return NULL;
|
|
} else if (xutftowcs_path(wfilename, filename) < 0)
|
|
return NULL;
|
|
|
|
if (xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
|
|
return NULL;
|
|
|
|
if (hide && !access(filename, F_OK) && set_hidden_flag(wfilename, 0)) {
|
|
error("could not unhide %s", filename);
|
|
return NULL;
|
|
}
|
|
file = _wfreopen(wfilename, wotype, stream);
|
|
if (file && hide && set_hidden_flag(wfilename, 1))
|
|
warning("could not mark '%s' as hidden.", filename);
|
|
return file;
|
|
}
|
|
|
|
#undef fflush
|
|
int mingw_fflush(FILE *stream)
|
|
{
|
|
int ret = fflush(stream);
|
|
|
|
/*
|
|
* write() is used behind the scenes of stdio output functions.
|
|
* Since git code does not check for errors after each stdio write
|
|
* operation, it can happen that write() is called by a later
|
|
* stdio function even if an earlier write() call failed. In the
|
|
* case of a pipe whose readable end was closed, only the first
|
|
* call to write() reports EPIPE on Windows. Subsequent write()
|
|
* calls report EINVAL. It is impossible to notice whether this
|
|
* fflush invocation triggered such a case, therefore, we have to
|
|
* catch all EINVAL errors whole-sale.
|
|
*/
|
|
if (ret && errno == EINVAL)
|
|
errno = EPIPE;
|
|
|
|
return ret;
|
|
}
|
|
|
|
#undef write
|
|
ssize_t mingw_write(int fd, const void *buf, size_t len)
|
|
{
|
|
ssize_t result = write(fd, buf, len);
|
|
|
|
if (result < 0 && errno == EINVAL && buf) {
|
|
/* check if fd is a pipe */
|
|
HANDLE h = (HANDLE) _get_osfhandle(fd);
|
|
if (GetFileType(h) == FILE_TYPE_PIPE)
|
|
errno = EPIPE;
|
|
else
|
|
errno = EINVAL;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
int mingw_access(const char *filename, int mode)
|
|
{
|
|
wchar_t wfilename[MAX_PATH];
|
|
if (!strcmp("nul", filename) || !strcmp("/dev/null", filename))
|
|
return 0;
|
|
if (xutftowcs_path(wfilename, filename) < 0)
|
|
return -1;
|
|
/* X_OK is not supported by the MSVCRT version */
|
|
return _waccess(wfilename, mode & ~X_OK);
|
|
}
|
|
|
|
int mingw_chdir(const char *dirname)
|
|
{
|
|
wchar_t wdirname[MAX_PATH];
|
|
if (xutftowcs_path(wdirname, dirname) < 0)
|
|
return -1;
|
|
return _wchdir(wdirname);
|
|
}
|
|
|
|
int mingw_chmod(const char *filename, int mode)
|
|
{
|
|
wchar_t wfilename[MAX_PATH];
|
|
if (xutftowcs_path(wfilename, filename) < 0)
|
|
return -1;
|
|
return _wchmod(wfilename, mode);
|
|
}
|
|
|
|
/*
|
|
* The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
|
|
* Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
|
|
*/
|
|
static inline long long filetime_to_hnsec(const FILETIME *ft)
|
|
{
|
|
long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
|
|
/* Windows to Unix Epoch conversion */
|
|
return winTime - 116444736000000000LL;
|
|
}
|
|
|
|
static inline void filetime_to_timespec(const FILETIME *ft, struct timespec *ts)
|
|
{
|
|
long long hnsec = filetime_to_hnsec(ft);
|
|
ts->tv_sec = (time_t)(hnsec / 10000000);
|
|
ts->tv_nsec = (hnsec % 10000000) * 100;
|
|
}
|
|
|
|
/**
|
|
* Verifies that safe_create_leading_directories() would succeed.
|
|
*/
|
|
static int has_valid_directory_prefix(wchar_t *wfilename)
|
|
{
|
|
int n = wcslen(wfilename);
|
|
|
|
while (n > 0) {
|
|
wchar_t c = wfilename[--n];
|
|
DWORD attributes;
|
|
|
|
if (!is_dir_sep(c))
|
|
continue;
|
|
|
|
wfilename[n] = L'\0';
|
|
attributes = GetFileAttributesW(wfilename);
|
|
wfilename[n] = c;
|
|
if (attributes &
|
|
(FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_DEVICE))
|
|
return 1;
|
|
if (attributes == INVALID_FILE_ATTRIBUTES)
|
|
switch (GetLastError()) {
|
|
case ERROR_PATH_NOT_FOUND:
|
|
continue;
|
|
case ERROR_FILE_NOT_FOUND:
|
|
/* This implies parent directory exists. */
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/* We keep the do_lstat code in a separate function to avoid recursion.
|
|
* When a path ends with a slash, the stat will fail with ENOENT. In
|
|
* this case, we strip the trailing slashes and stat again.
|
|
*
|
|
* If follow is true then act like stat() and report on the link
|
|
* target. Otherwise report on the link itself.
|
|
*/
|
|
static int do_lstat(int follow, const char *file_name, struct stat *buf)
|
|
{
|
|
WIN32_FILE_ATTRIBUTE_DATA fdata;
|
|
wchar_t wfilename[MAX_PATH];
|
|
if (xutftowcs_path(wfilename, file_name) < 0)
|
|
return -1;
|
|
|
|
if (GetFileAttributesExW(wfilename, GetFileExInfoStandard, &fdata)) {
|
|
buf->st_ino = 0;
|
|
buf->st_gid = 0;
|
|
buf->st_uid = 0;
|
|
buf->st_nlink = 1;
|
|
buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
|
|
buf->st_size = fdata.nFileSizeLow |
|
|
(((off_t)fdata.nFileSizeHigh)<<32);
|
|
buf->st_dev = buf->st_rdev = 0; /* not used by Git */
|
|
filetime_to_timespec(&(fdata.ftLastAccessTime), &(buf->st_atim));
|
|
filetime_to_timespec(&(fdata.ftLastWriteTime), &(buf->st_mtim));
|
|
filetime_to_timespec(&(fdata.ftCreationTime), &(buf->st_ctim));
|
|
if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
|
|
WIN32_FIND_DATAW findbuf;
|
|
HANDLE handle = FindFirstFileW(wfilename, &findbuf);
|
|
if (handle != INVALID_HANDLE_VALUE) {
|
|
if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
|
|
(findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
|
|
if (follow) {
|
|
char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
|
|
buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
|
|
} else {
|
|
buf->st_mode = S_IFLNK;
|
|
}
|
|
buf->st_mode |= S_IREAD;
|
|
if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
|
|
buf->st_mode |= S_IWRITE;
|
|
}
|
|
FindClose(handle);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
switch (GetLastError()) {
|
|
case ERROR_ACCESS_DENIED:
|
|
case ERROR_SHARING_VIOLATION:
|
|
case ERROR_LOCK_VIOLATION:
|
|
case ERROR_SHARING_BUFFER_EXCEEDED:
|
|
errno = EACCES;
|
|
break;
|
|
case ERROR_BUFFER_OVERFLOW:
|
|
errno = ENAMETOOLONG;
|
|
break;
|
|
case ERROR_NOT_ENOUGH_MEMORY:
|
|
errno = ENOMEM;
|
|
break;
|
|
case ERROR_PATH_NOT_FOUND:
|
|
if (!has_valid_directory_prefix(wfilename)) {
|
|
errno = ENOTDIR;
|
|
break;
|
|
}
|
|
/* fallthru */
|
|
default:
|
|
errno = ENOENT;
|
|
break;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
/* We provide our own lstat/fstat functions, since the provided
|
|
* lstat/fstat functions are so slow. These stat functions are
|
|
* tailored for Git's usage (read: fast), and are not meant to be
|
|
* complete. Note that Git stat()s are redirected to mingw_lstat()
|
|
* too, since Windows doesn't really handle symlinks that well.
|
|
*/
|
|
static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
|
|
{
|
|
int namelen;
|
|
char alt_name[PATH_MAX];
|
|
|
|
if (!do_lstat(follow, file_name, buf))
|
|
return 0;
|
|
|
|
/* if file_name ended in a '/', Windows returned ENOENT;
|
|
* try again without trailing slashes
|
|
*/
|
|
if (errno != ENOENT)
|
|
return -1;
|
|
|
|
namelen = strlen(file_name);
|
|
if (namelen && file_name[namelen-1] != '/')
|
|
return -1;
|
|
while (namelen && file_name[namelen-1] == '/')
|
|
--namelen;
|
|
if (!namelen || namelen >= PATH_MAX)
|
|
return -1;
|
|
|
|
memcpy(alt_name, file_name, namelen);
|
|
alt_name[namelen] = 0;
|
|
return do_lstat(follow, alt_name, buf);
|
|
}
|
|
|
|
static int get_file_info_by_handle(HANDLE hnd, struct stat *buf)
|
|
{
|
|
BY_HANDLE_FILE_INFORMATION fdata;
|
|
|
|
if (!GetFileInformationByHandle(hnd, &fdata)) {
|
|
errno = err_win_to_posix(GetLastError());
|
|
return -1;
|
|
}
|
|
|
|
buf->st_ino = 0;
|
|
buf->st_gid = 0;
|
|
buf->st_uid = 0;
|
|
buf->st_nlink = 1;
|
|
buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
|
|
buf->st_size = fdata.nFileSizeLow |
|
|
(((off_t)fdata.nFileSizeHigh)<<32);
|
|
buf->st_dev = buf->st_rdev = 0; /* not used by Git */
|
|
filetime_to_timespec(&(fdata.ftLastAccessTime), &(buf->st_atim));
|
|
filetime_to_timespec(&(fdata.ftLastWriteTime), &(buf->st_mtim));
|
|
filetime_to_timespec(&(fdata.ftCreationTime), &(buf->st_ctim));
|
|
return 0;
|
|
}
|
|
|
|
int mingw_lstat(const char *file_name, struct stat *buf)
|
|
{
|
|
return do_stat_internal(0, file_name, buf);
|
|
}
|
|
int mingw_stat(const char *file_name, struct stat *buf)
|
|
{
|
|
return do_stat_internal(1, file_name, buf);
|
|
}
|
|
|
|
int mingw_fstat(int fd, struct stat *buf)
|
|
{
|
|
HANDLE fh = (HANDLE)_get_osfhandle(fd);
|
|
DWORD avail, type = GetFileType(fh) & ~FILE_TYPE_REMOTE;
|
|
|
|
switch (type) {
|
|
case FILE_TYPE_DISK:
|
|
return get_file_info_by_handle(fh, buf);
|
|
|
|
case FILE_TYPE_CHAR:
|
|
case FILE_TYPE_PIPE:
|
|
/* initialize stat fields */
|
|
memset(buf, 0, sizeof(*buf));
|
|
buf->st_nlink = 1;
|
|
|
|
if (type == FILE_TYPE_CHAR) {
|
|
buf->st_mode = _S_IFCHR;
|
|
} else {
|
|
buf->st_mode = _S_IFIFO;
|
|
if (PeekNamedPipe(fh, NULL, 0, NULL, &avail, NULL))
|
|
buf->st_size = avail;
|
|
}
|
|
return 0;
|
|
|
|
default:
|
|
errno = EBADF;
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
static inline void time_t_to_filetime(time_t t, FILETIME *ft)
|
|
{
|
|
long long winTime = t * 10000000LL + 116444736000000000LL;
|
|
ft->dwLowDateTime = winTime;
|
|
ft->dwHighDateTime = winTime >> 32;
|
|
}
|
|
|
|
int mingw_utime (const char *file_name, const struct utimbuf *times)
|
|
{
|
|
FILETIME mft, aft;
|
|
int rc;
|
|
DWORD attrs;
|
|
wchar_t wfilename[MAX_PATH];
|
|
HANDLE osfilehandle;
|
|
|
|
if (xutftowcs_path(wfilename, file_name) < 0)
|
|
return -1;
|
|
|
|
/* must have write permission */
|
|
attrs = GetFileAttributesW(wfilename);
|
|
if (attrs != INVALID_FILE_ATTRIBUTES &&
|
|
(attrs & FILE_ATTRIBUTE_READONLY)) {
|
|
/* ignore errors here; open() will report them */
|
|
SetFileAttributesW(wfilename, attrs & ~FILE_ATTRIBUTE_READONLY);
|
|
}
|
|
|
|
osfilehandle = CreateFileW(wfilename,
|
|
FILE_WRITE_ATTRIBUTES,
|
|
0 /*FileShare.None*/,
|
|
NULL,
|
|
OPEN_EXISTING,
|
|
(attrs != INVALID_FILE_ATTRIBUTES &&
|
|
(attrs & FILE_ATTRIBUTE_DIRECTORY)) ?
|
|
FILE_FLAG_BACKUP_SEMANTICS : 0,
|
|
NULL);
|
|
if (osfilehandle == INVALID_HANDLE_VALUE) {
|
|
errno = err_win_to_posix(GetLastError());
|
|
rc = -1;
|
|
goto revert_attrs;
|
|
}
|
|
|
|
if (times) {
|
|
time_t_to_filetime(times->modtime, &mft);
|
|
time_t_to_filetime(times->actime, &aft);
|
|
} else {
|
|
GetSystemTimeAsFileTime(&mft);
|
|
aft = mft;
|
|
}
|
|
|
|
if (!SetFileTime(osfilehandle, NULL, &aft, &mft)) {
|
|
errno = EINVAL;
|
|
rc = -1;
|
|
} else
|
|
rc = 0;
|
|
|
|
if (osfilehandle != INVALID_HANDLE_VALUE)
|
|
CloseHandle(osfilehandle);
|
|
|
|
revert_attrs:
|
|
if (attrs != INVALID_FILE_ATTRIBUTES &&
|
|
(attrs & FILE_ATTRIBUTE_READONLY)) {
|
|
/* ignore errors again */
|
|
SetFileAttributesW(wfilename, attrs);
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
#undef strftime
|
|
size_t mingw_strftime(char *s, size_t max,
|
|
const char *format, const struct tm *tm)
|
|
{
|
|
/* a pointer to the original strftime in case we can't find the UCRT version */
|
|
static size_t (*fallback)(char *, size_t, const char *, const struct tm *) = strftime;
|
|
size_t ret;
|
|
DECLARE_PROC_ADDR(ucrtbase.dll, size_t, __cdecl, strftime, char *, size_t,
|
|
const char *, const struct tm *);
|
|
|
|
if (INIT_PROC_ADDR(strftime))
|
|
ret = strftime(s, max, format, tm);
|
|
else
|
|
ret = fallback(s, max, format, tm);
|
|
|
|
if (!ret && errno == EINVAL)
|
|
die("invalid strftime format: '%s'", format);
|
|
return ret;
|
|
}
|
|
|
|
unsigned int sleep (unsigned int seconds)
|
|
{
|
|
Sleep(seconds*1000);
|
|
return 0;
|
|
}
|
|
|
|
char *mingw_mktemp(char *template)
|
|
{
|
|
wchar_t wtemplate[MAX_PATH];
|
|
if (xutftowcs_path(wtemplate, template) < 0)
|
|
return NULL;
|
|
if (!_wmktemp(wtemplate))
|
|
return NULL;
|
|
if (xwcstoutf(template, wtemplate, strlen(template) + 1) < 0)
|
|
return NULL;
|
|
return template;
|
|
}
|
|
|
|
int mkstemp(char *template)
|
|
{
|
|
return git_mkstemp_mode(template, 0600);
|
|
}
|
|
|
|
int gettimeofday(struct timeval *tv, void *tz)
|
|
{
|
|
FILETIME ft;
|
|
long long hnsec;
|
|
|
|
GetSystemTimeAsFileTime(&ft);
|
|
hnsec = filetime_to_hnsec(&ft);
|
|
tv->tv_sec = hnsec / 10000000;
|
|
tv->tv_usec = (hnsec % 10000000) / 10;
|
|
return 0;
|
|
}
|
|
|
|
int pipe(int filedes[2])
|
|
{
|
|
HANDLE h[2];
|
|
|
|
/* this creates non-inheritable handles */
|
|
if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
|
|
errno = err_win_to_posix(GetLastError());
|
|
return -1;
|
|
}
|
|
filedes[0] = _open_osfhandle(HCAST(int, h[0]), O_NOINHERIT);
|
|
if (filedes[0] < 0) {
|
|
CloseHandle(h[0]);
|
|
CloseHandle(h[1]);
|
|
return -1;
|
|
}
|
|
filedes[1] = _open_osfhandle(HCAST(int, h[1]), O_NOINHERIT);
|
|
if (filedes[1] < 0) {
|
|
close(filedes[0]);
|
|
CloseHandle(h[1]);
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#ifndef __MINGW64__
|
|
struct tm *gmtime_r(const time_t *timep, struct tm *result)
|
|
{
|
|
if (gmtime_s(result, timep) == 0)
|
|
return result;
|
|
return NULL;
|
|
}
|
|
|
|
struct tm *localtime_r(const time_t *timep, struct tm *result)
|
|
{
|
|
if (localtime_s(result, timep) == 0)
|
|
return result;
|
|
return NULL;
|
|
}
|
|
#endif
|
|
|
|
char *mingw_getcwd(char *pointer, int len)
|
|
{
|
|
wchar_t cwd[MAX_PATH], wpointer[MAX_PATH];
|
|
DWORD ret = GetCurrentDirectoryW(ARRAY_SIZE(cwd), cwd);
|
|
|
|
if (!ret || ret >= ARRAY_SIZE(cwd)) {
|
|
errno = ret ? ENAMETOOLONG : err_win_to_posix(GetLastError());
|
|
return NULL;
|
|
}
|
|
ret = GetLongPathNameW(cwd, wpointer, ARRAY_SIZE(wpointer));
|
|
if (!ret && GetLastError() == ERROR_ACCESS_DENIED) {
|
|
HANDLE hnd = CreateFileW(cwd, 0,
|
|
FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL,
|
|
OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
|
|
if (hnd == INVALID_HANDLE_VALUE)
|
|
return NULL;
|
|
ret = GetFinalPathNameByHandleW(hnd, wpointer, ARRAY_SIZE(wpointer), 0);
|
|
CloseHandle(hnd);
|
|
if (!ret || ret >= ARRAY_SIZE(wpointer))
|
|
return NULL;
|
|
if (xwcstoutf(pointer, normalize_ntpath(wpointer), len) < 0)
|
|
return NULL;
|
|
return pointer;
|
|
}
|
|
if (!ret || ret >= ARRAY_SIZE(wpointer))
|
|
return NULL;
|
|
if (GetFileAttributesW(wpointer) == INVALID_FILE_ATTRIBUTES) {
|
|
errno = ENOENT;
|
|
return NULL;
|
|
}
|
|
if (xwcstoutf(pointer, wpointer, len) < 0)
|
|
return NULL;
|
|
convert_slashes(pointer);
|
|
return pointer;
|
|
}
|
|
|
|
/*
|
|
* See "Parsing C++ Command-Line Arguments" at Microsoft's Docs:
|
|
* https://docs.microsoft.com/en-us/cpp/cpp/parsing-cpp-command-line-arguments
|
|
*/
|
|
static const char *quote_arg_msvc(const char *arg)
|
|
{
|
|
/* count chars to quote */
|
|
int len = 0, n = 0;
|
|
int force_quotes = 0;
|
|
char *q, *d;
|
|
const char *p = arg;
|
|
if (!*p) force_quotes = 1;
|
|
while (*p) {
|
|
if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
|
|
force_quotes = 1;
|
|
else if (*p == '"')
|
|
n++;
|
|
else if (*p == '\\') {
|
|
int count = 0;
|
|
while (*p == '\\') {
|
|
count++;
|
|
p++;
|
|
len++;
|
|
}
|
|
if (*p == '"' || !*p)
|
|
n += count*2 + 1;
|
|
continue;
|
|
}
|
|
len++;
|
|
p++;
|
|
}
|
|
if (!force_quotes && n == 0)
|
|
return arg;
|
|
|
|
/* insert \ where necessary */
|
|
d = q = xmalloc(st_add3(len, n, 3));
|
|
*d++ = '"';
|
|
while (*arg) {
|
|
if (*arg == '"')
|
|
*d++ = '\\';
|
|
else if (*arg == '\\') {
|
|
int count = 0;
|
|
while (*arg == '\\') {
|
|
count++;
|
|
*d++ = *arg++;
|
|
}
|
|
if (*arg == '"' || !*arg) {
|
|
while (count-- > 0)
|
|
*d++ = '\\';
|
|
/* don't escape the surrounding end quote */
|
|
if (!*arg)
|
|
break;
|
|
*d++ = '\\';
|
|
}
|
|
}
|
|
*d++ = *arg++;
|
|
}
|
|
*d++ = '"';
|
|
*d++ = '\0';
|
|
return q;
|
|
}
|
|
|
|
#include "quote.h"
|
|
|
|
static const char *quote_arg_msys2(const char *arg)
|
|
{
|
|
struct strbuf buf = STRBUF_INIT;
|
|
const char *p2 = arg, *p;
|
|
|
|
for (p = arg; *p; p++) {
|
|
int ws = isspace(*p);
|
|
if (!ws && *p != '\\' && *p != '"' && *p != '{' && *p != '\'' &&
|
|
*p != '?' && *p != '*' && *p != '~')
|
|
continue;
|
|
if (!buf.len)
|
|
strbuf_addch(&buf, '"');
|
|
if (p != p2)
|
|
strbuf_add(&buf, p2, p - p2);
|
|
if (*p == '\\' || *p == '"')
|
|
strbuf_addch(&buf, '\\');
|
|
p2 = p;
|
|
}
|
|
|
|
if (p == arg)
|
|
strbuf_addch(&buf, '"');
|
|
else if (!buf.len)
|
|
return arg;
|
|
else
|
|
strbuf_add(&buf, p2, p - p2);
|
|
|
|
strbuf_addch(&buf, '"');
|
|
return strbuf_detach(&buf, 0);
|
|
}
|
|
|
|
static const char *parse_interpreter(const char *cmd)
|
|
{
|
|
static char buf[100];
|
|
char *p, *opt;
|
|
int n, fd;
|
|
|
|
/* don't even try a .exe */
|
|
n = strlen(cmd);
|
|
if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
|
|
return NULL;
|
|
|
|
fd = open(cmd, O_RDONLY);
|
|
if (fd < 0)
|
|
return NULL;
|
|
n = read(fd, buf, sizeof(buf)-1);
|
|
close(fd);
|
|
if (n < 4) /* at least '#!/x' and not error */
|
|
return NULL;
|
|
|
|
if (buf[0] != '#' || buf[1] != '!')
|
|
return NULL;
|
|
buf[n] = '\0';
|
|
p = buf + strcspn(buf, "\r\n");
|
|
if (!*p)
|
|
return NULL;
|
|
|
|
*p = '\0';
|
|
if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
|
|
return NULL;
|
|
/* strip options */
|
|
if ((opt = strchr(p+1, ' ')))
|
|
*opt = '\0';
|
|
return p+1;
|
|
}
|
|
|
|
/*
|
|
* exe_only means that we only want to detect .exe files, but not scripts
|
|
* (which do not have an extension)
|
|
*/
|
|
static char *lookup_prog(const char *dir, int dirlen, const char *cmd,
|
|
int isexe, int exe_only)
|
|
{
|
|
char path[MAX_PATH];
|
|
wchar_t wpath[MAX_PATH];
|
|
snprintf(path, sizeof(path), "%.*s\\%s.exe", dirlen, dir, cmd);
|
|
|
|
if (xutftowcs_path(wpath, path) < 0)
|
|
return NULL;
|
|
|
|
if (!isexe && _waccess(wpath, F_OK) == 0)
|
|
return xstrdup(path);
|
|
wpath[wcslen(wpath)-4] = '\0';
|
|
if ((!exe_only || isexe) && _waccess(wpath, F_OK) == 0) {
|
|
if (!(GetFileAttributesW(wpath) & FILE_ATTRIBUTE_DIRECTORY)) {
|
|
path[strlen(path)-4] = '\0';
|
|
return xstrdup(path);
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Determines the absolute path of cmd using the split path in path.
|
|
* If cmd contains a slash or backslash, no lookup is performed.
|
|
*/
|
|
static char *path_lookup(const char *cmd, int exe_only)
|
|
{
|
|
const char *path;
|
|
char *prog = NULL;
|
|
int len = strlen(cmd);
|
|
int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
|
|
|
|
if (strpbrk(cmd, "/\\"))
|
|
return xstrdup(cmd);
|
|
|
|
path = mingw_getenv("PATH");
|
|
if (!path)
|
|
return NULL;
|
|
|
|
while (!prog) {
|
|
const char *sep = strchrnul(path, ';');
|
|
int dirlen = sep - path;
|
|
if (dirlen)
|
|
prog = lookup_prog(path, dirlen, cmd, isexe, exe_only);
|
|
if (!*sep)
|
|
break;
|
|
path = sep + 1;
|
|
}
|
|
|
|
return prog;
|
|
}
|
|
|
|
static const wchar_t *wcschrnul(const wchar_t *s, wchar_t c)
|
|
{
|
|
while (*s && *s != c)
|
|
s++;
|
|
return s;
|
|
}
|
|
|
|
/* Compare only keys */
|
|
static int wenvcmp(const void *a, const void *b)
|
|
{
|
|
wchar_t *p = *(wchar_t **)a, *q = *(wchar_t **)b;
|
|
size_t p_len, q_len;
|
|
|
|
/* Find the keys */
|
|
p_len = wcschrnul(p, L'=') - p;
|
|
q_len = wcschrnul(q, L'=') - q;
|
|
|
|
/* If the length differs, include the shorter key's NUL */
|
|
if (p_len < q_len)
|
|
p_len++;
|
|
else if (p_len > q_len)
|
|
p_len = q_len + 1;
|
|
|
|
return _wcsnicmp(p, q, p_len);
|
|
}
|
|
|
|
/*
|
|
* Build an environment block combining the inherited environment
|
|
* merged with the given list of settings.
|
|
*
|
|
* Values of the form "KEY=VALUE" in deltaenv override inherited values.
|
|
* Values of the form "KEY" in deltaenv delete inherited values.
|
|
*
|
|
* Multiple entries in deltaenv for the same key are explicitly allowed.
|
|
*
|
|
* We return a contiguous block of UNICODE strings with a final trailing
|
|
* zero word.
|
|
*/
|
|
static wchar_t *make_environment_block(char **deltaenv)
|
|
{
|
|
wchar_t *wenv = GetEnvironmentStringsW(), *wdeltaenv, *result, *p;
|
|
size_t wlen, s, delta_size, size;
|
|
|
|
wchar_t **array = NULL;
|
|
size_t alloc = 0, nr = 0, i;
|
|
|
|
size = 1; /* for extra NUL at the end */
|
|
|
|
/* If there is no deltaenv to apply, simply return a copy. */
|
|
if (!deltaenv || !*deltaenv) {
|
|
for (p = wenv; p && *p; ) {
|
|
size_t s = wcslen(p) + 1;
|
|
size += s;
|
|
p += s;
|
|
}
|
|
|
|
ALLOC_ARRAY(result, size);
|
|
COPY_ARRAY(result, wenv, size);
|
|
FreeEnvironmentStringsW(wenv);
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* If there is a deltaenv, let's accumulate all keys into `array`,
|
|
* sort them using the stable git_stable_qsort() and then copy,
|
|
* skipping duplicate keys
|
|
*/
|
|
for (p = wenv; p && *p; ) {
|
|
ALLOC_GROW(array, nr + 1, alloc);
|
|
s = wcslen(p) + 1;
|
|
array[nr++] = p;
|
|
p += s;
|
|
size += s;
|
|
}
|
|
|
|
/* (over-)assess size needed for wchar version of deltaenv */
|
|
for (delta_size = 0, i = 0; deltaenv[i]; i++)
|
|
delta_size += strlen(deltaenv[i]) * 2 + 1;
|
|
ALLOC_ARRAY(wdeltaenv, delta_size);
|
|
|
|
/* convert the deltaenv, appending to array */
|
|
for (i = 0, p = wdeltaenv; deltaenv[i]; i++) {
|
|
ALLOC_GROW(array, nr + 1, alloc);
|
|
wlen = xutftowcs(p, deltaenv[i], wdeltaenv + delta_size - p);
|
|
array[nr++] = p;
|
|
p += wlen + 1;
|
|
}
|
|
|
|
git_stable_qsort(array, nr, sizeof(*array), wenvcmp);
|
|
ALLOC_ARRAY(result, size + delta_size);
|
|
|
|
for (p = result, i = 0; i < nr; i++) {
|
|
/* Skip any duplicate keys; last one wins */
|
|
while (i + 1 < nr && !wenvcmp(array + i, array + i + 1))
|
|
i++;
|
|
|
|
/* Skip "to delete" entry */
|
|
if (!wcschr(array[i], L'='))
|
|
continue;
|
|
|
|
size = wcslen(array[i]) + 1;
|
|
COPY_ARRAY(p, array[i], size);
|
|
p += size;
|
|
}
|
|
*p = L'\0';
|
|
|
|
free(array);
|
|
free(wdeltaenv);
|
|
FreeEnvironmentStringsW(wenv);
|
|
return result;
|
|
}
|
|
|
|
static void do_unset_environment_variables(void)
|
|
{
|
|
static int done;
|
|
char *p = unset_environment_variables;
|
|
|
|
if (done || !p)
|
|
return;
|
|
done = 1;
|
|
|
|
for (;;) {
|
|
char *comma = strchr(p, ',');
|
|
|
|
if (comma)
|
|
*comma = '\0';
|
|
unsetenv(p);
|
|
if (!comma)
|
|
break;
|
|
p = comma + 1;
|
|
}
|
|
}
|
|
|
|
struct pinfo_t {
|
|
struct pinfo_t *next;
|
|
pid_t pid;
|
|
HANDLE proc;
|
|
};
|
|
static struct pinfo_t *pinfo = NULL;
|
|
CRITICAL_SECTION pinfo_cs;
|
|
|
|
/* Used to match and chomp off path components */
|
|
static inline int match_last_path_component(const char *path, size_t *len,
|
|
const char *component)
|
|
{
|
|
size_t component_len = strlen(component);
|
|
if (*len < component_len + 1 ||
|
|
!is_dir_sep(path[*len - component_len - 1]) ||
|
|
fspathncmp(path + *len - component_len, component, component_len))
|
|
return 0;
|
|
*len -= component_len + 1;
|
|
/* chomp off repeated dir separators */
|
|
while (*len > 0 && is_dir_sep(path[*len - 1]))
|
|
(*len)--;
|
|
return 1;
|
|
}
|
|
|
|
static int is_msys2_sh(const char *cmd)
|
|
{
|
|
if (!cmd)
|
|
return 0;
|
|
|
|
if (!strcmp(cmd, "sh")) {
|
|
static int ret = -1;
|
|
char *p;
|
|
|
|
if (ret >= 0)
|
|
return ret;
|
|
|
|
p = path_lookup(cmd, 0);
|
|
if (!p)
|
|
ret = 0;
|
|
else {
|
|
size_t len = strlen(p);
|
|
|
|
ret = match_last_path_component(p, &len, "sh.exe") &&
|
|
match_last_path_component(p, &len, "bin") &&
|
|
match_last_path_component(p, &len, "usr");
|
|
free(p);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
if (ends_with(cmd, "\\sh.exe")) {
|
|
static char *sh;
|
|
|
|
if (!sh)
|
|
sh = path_lookup("sh", 0);
|
|
|
|
return !fspathcmp(cmd, sh);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **deltaenv,
|
|
const char *dir,
|
|
int prepend_cmd, int fhin, int fhout, int fherr)
|
|
{
|
|
static int restrict_handle_inheritance = -1;
|
|
STARTUPINFOEXW si;
|
|
PROCESS_INFORMATION pi;
|
|
LPPROC_THREAD_ATTRIBUTE_LIST attr_list = NULL;
|
|
HANDLE stdhandles[3];
|
|
DWORD stdhandles_count = 0;
|
|
SIZE_T size;
|
|
struct strbuf args;
|
|
wchar_t wcmd[MAX_PATH], wdir[MAX_PATH], *wargs, *wenvblk = NULL;
|
|
unsigned flags = CREATE_UNICODE_ENVIRONMENT;
|
|
BOOL ret;
|
|
HANDLE cons;
|
|
const char *(*quote_arg)(const char *arg) =
|
|
is_msys2_sh(cmd ? cmd : *argv) ?
|
|
quote_arg_msys2 : quote_arg_msvc;
|
|
const char *strace_env;
|
|
|
|
/* Make sure to override previous errors, if any */
|
|
errno = 0;
|
|
|
|
if (restrict_handle_inheritance < 0)
|
|
restrict_handle_inheritance = core_restrict_inherited_handles;
|
|
/*
|
|
* The following code to restrict which handles are inherited seems
|
|
* to work properly only on Windows 7 and later, so let's disable it
|
|
* on Windows Vista and 2008.
|
|
*/
|
|
if (restrict_handle_inheritance < 0)
|
|
restrict_handle_inheritance = GetVersion() >> 16 >= 7601;
|
|
|
|
do_unset_environment_variables();
|
|
|
|
/* Determine whether or not we are associated to a console */
|
|
cons = CreateFileW(L"CONOUT$", GENERIC_WRITE,
|
|
FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
|
|
FILE_ATTRIBUTE_NORMAL, NULL);
|
|
if (cons == INVALID_HANDLE_VALUE) {
|
|
/* There is no console associated with this process.
|
|
* Since the child is a console process, Windows
|
|
* would normally create a console window. But
|
|
* since we'll be redirecting std streams, we do
|
|
* not need the console.
|
|
* It is necessary to use DETACHED_PROCESS
|
|
* instead of CREATE_NO_WINDOW to make ssh
|
|
* recognize that it has no console.
|
|
*/
|
|
flags |= DETACHED_PROCESS;
|
|
} else {
|
|
/* There is already a console. If we specified
|
|
* DETACHED_PROCESS here, too, Windows would
|
|
* disassociate the child from the console.
|
|
* The same is true for CREATE_NO_WINDOW.
|
|
* Go figure!
|
|
*/
|
|
CloseHandle(cons);
|
|
}
|
|
memset(&si, 0, sizeof(si));
|
|
si.StartupInfo.cb = sizeof(si);
|
|
si.StartupInfo.hStdInput = winansi_get_osfhandle(fhin);
|
|
si.StartupInfo.hStdOutput = winansi_get_osfhandle(fhout);
|
|
si.StartupInfo.hStdError = winansi_get_osfhandle(fherr);
|
|
|
|
/* The list of handles cannot contain duplicates */
|
|
if (si.StartupInfo.hStdInput != INVALID_HANDLE_VALUE)
|
|
stdhandles[stdhandles_count++] = si.StartupInfo.hStdInput;
|
|
if (si.StartupInfo.hStdOutput != INVALID_HANDLE_VALUE &&
|
|
si.StartupInfo.hStdOutput != si.StartupInfo.hStdInput)
|
|
stdhandles[stdhandles_count++] = si.StartupInfo.hStdOutput;
|
|
if (si.StartupInfo.hStdError != INVALID_HANDLE_VALUE &&
|
|
si.StartupInfo.hStdError != si.StartupInfo.hStdInput &&
|
|
si.StartupInfo.hStdError != si.StartupInfo.hStdOutput)
|
|
stdhandles[stdhandles_count++] = si.StartupInfo.hStdError;
|
|
if (stdhandles_count)
|
|
si.StartupInfo.dwFlags |= STARTF_USESTDHANDLES;
|
|
|
|
if (*argv && !strcmp(cmd, *argv))
|
|
wcmd[0] = L'\0';
|
|
else if (xutftowcs_path(wcmd, cmd) < 0)
|
|
return -1;
|
|
if (dir && xutftowcs_path(wdir, dir) < 0)
|
|
return -1;
|
|
|
|
/* concatenate argv, quoting args as we go */
|
|
strbuf_init(&args, 0);
|
|
if (prepend_cmd) {
|
|
char *quoted = (char *)quote_arg(cmd);
|
|
strbuf_addstr(&args, quoted);
|
|
if (quoted != cmd)
|
|
free(quoted);
|
|
}
|
|
for (; *argv; argv++) {
|
|
char *quoted = (char *)quote_arg(*argv);
|
|
if (*args.buf)
|
|
strbuf_addch(&args, ' ');
|
|
strbuf_addstr(&args, quoted);
|
|
if (quoted != *argv)
|
|
free(quoted);
|
|
}
|
|
|
|
strace_env = getenv("GIT_STRACE_COMMANDS");
|
|
if (strace_env) {
|
|
char *p = path_lookup("strace.exe", 1);
|
|
if (!p)
|
|
return error("strace not found!");
|
|
if (xutftowcs_path(wcmd, p) < 0) {
|
|
free(p);
|
|
return -1;
|
|
}
|
|
free(p);
|
|
if (!strcmp("1", strace_env) ||
|
|
!strcasecmp("yes", strace_env) ||
|
|
!strcasecmp("true", strace_env))
|
|
strbuf_insert(&args, 0, "strace ", 7);
|
|
else {
|
|
const char *quoted = quote_arg(strace_env);
|
|
struct strbuf buf = STRBUF_INIT;
|
|
strbuf_addf(&buf, "strace -o %s ", quoted);
|
|
if (quoted != strace_env)
|
|
free((char *)quoted);
|
|
strbuf_insert(&args, 0, buf.buf, buf.len);
|
|
strbuf_release(&buf);
|
|
}
|
|
}
|
|
|
|
ALLOC_ARRAY(wargs, st_add(st_mult(2, args.len), 1));
|
|
xutftowcs(wargs, args.buf, 2 * args.len + 1);
|
|
strbuf_release(&args);
|
|
|
|
wenvblk = make_environment_block(deltaenv);
|
|
|
|
memset(&pi, 0, sizeof(pi));
|
|
if (restrict_handle_inheritance && stdhandles_count &&
|
|
(InitializeProcThreadAttributeList(NULL, 1, 0, &size) ||
|
|
GetLastError() == ERROR_INSUFFICIENT_BUFFER) &&
|
|
(attr_list = (LPPROC_THREAD_ATTRIBUTE_LIST)
|
|
(HeapAlloc(GetProcessHeap(), 0, size))) &&
|
|
InitializeProcThreadAttributeList(attr_list, 1, 0, &size) &&
|
|
UpdateProcThreadAttribute(attr_list, 0,
|
|
PROC_THREAD_ATTRIBUTE_HANDLE_LIST,
|
|
stdhandles,
|
|
stdhandles_count * sizeof(HANDLE),
|
|
NULL, NULL)) {
|
|
si.lpAttributeList = attr_list;
|
|
flags |= EXTENDED_STARTUPINFO_PRESENT;
|
|
}
|
|
|
|
ret = CreateProcessW(*wcmd ? wcmd : NULL, wargs, NULL, NULL,
|
|
stdhandles_count ? TRUE : FALSE,
|
|
flags, wenvblk, dir ? wdir : NULL,
|
|
&si.StartupInfo, &pi);
|
|
|
|
/*
|
|
* On Windows 2008 R2, it seems that specifying certain types of handles
|
|
* (such as FILE_TYPE_CHAR or FILE_TYPE_PIPE) will always produce an
|
|
* error. Rather than playing finicky and fragile games, let's just try
|
|
* to detect this situation and simply try again without restricting any
|
|
* handle inheritance. This is still better than failing to create
|
|
* processes.
|
|
*/
|
|
if (!ret && restrict_handle_inheritance && stdhandles_count) {
|
|
DWORD err = GetLastError();
|
|
struct strbuf buf = STRBUF_INIT;
|
|
|
|
if (err != ERROR_NO_SYSTEM_RESOURCES &&
|
|
/*
|
|
* On Windows 7 and earlier, handles on pipes and character
|
|
* devices are inherited automatically, and cannot be
|
|
* specified in the thread handle list. Rather than trying
|
|
* to catch each and every corner case (and running the
|
|
* chance of *still* forgetting a few), let's just fall
|
|
* back to creating the process without trying to limit the
|
|
* handle inheritance.
|
|
*/
|
|
!(err == ERROR_INVALID_PARAMETER &&
|
|
GetVersion() >> 16 < 9200) &&
|
|
!getenv("SUPPRESS_HANDLE_INHERITANCE_WARNING")) {
|
|
DWORD fl = 0;
|
|
int i;
|
|
|
|
setenv("SUPPRESS_HANDLE_INHERITANCE_WARNING", "1", 1);
|
|
|
|
for (i = 0; i < stdhandles_count; i++) {
|
|
HANDLE h = stdhandles[i];
|
|
strbuf_addf(&buf, "handle #%d: %p (type %lx, "
|
|
"handle info (%d) %lx\n", i, h,
|
|
GetFileType(h),
|
|
GetHandleInformation(h, &fl),
|
|
fl);
|
|
}
|
|
strbuf_addstr(&buf, "\nThis is a bug; please report it "
|
|
"at\nhttps://github.com/git-for-windows/"
|
|
"git/issues/new\n\n"
|
|
"To suppress this warning, please set "
|
|
"the environment variable\n\n"
|
|
"\tSUPPRESS_HANDLE_INHERITANCE_WARNING=1"
|
|
"\n");
|
|
}
|
|
restrict_handle_inheritance = 0;
|
|
flags &= ~EXTENDED_STARTUPINFO_PRESENT;
|
|
ret = CreateProcessW(*wcmd ? wcmd : NULL, wargs, NULL, NULL,
|
|
TRUE, flags, wenvblk, dir ? wdir : NULL,
|
|
&si.StartupInfo, &pi);
|
|
if (!ret)
|
|
errno = err_win_to_posix(GetLastError());
|
|
if (ret && buf.len) {
|
|
warning("failed to restrict file handles (%ld)\n\n%s",
|
|
err, buf.buf);
|
|
}
|
|
strbuf_release(&buf);
|
|
} else if (!ret)
|
|
errno = err_win_to_posix(GetLastError());
|
|
|
|
if (si.lpAttributeList)
|
|
DeleteProcThreadAttributeList(si.lpAttributeList);
|
|
if (attr_list)
|
|
HeapFree(GetProcessHeap(), 0, attr_list);
|
|
|
|
free(wenvblk);
|
|
free(wargs);
|
|
|
|
if (!ret)
|
|
return -1;
|
|
|
|
CloseHandle(pi.hThread);
|
|
|
|
/*
|
|
* The process ID is the human-readable identifier of the process
|
|
* that we want to present in log and error messages. The handle
|
|
* is not useful for this purpose. But we cannot close it, either,
|
|
* because it is not possible to turn a process ID into a process
|
|
* handle after the process terminated.
|
|
* Keep the handle in a list for waitpid.
|
|
*/
|
|
EnterCriticalSection(&pinfo_cs);
|
|
{
|
|
struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
|
|
info->pid = pi.dwProcessId;
|
|
info->proc = pi.hProcess;
|
|
info->next = pinfo;
|
|
pinfo = info;
|
|
}
|
|
LeaveCriticalSection(&pinfo_cs);
|
|
|
|
return (pid_t)pi.dwProcessId;
|
|
}
|
|
|
|
static pid_t mingw_spawnv(const char *cmd, const char **argv, int prepend_cmd)
|
|
{
|
|
return mingw_spawnve_fd(cmd, argv, NULL, NULL, prepend_cmd, 0, 1, 2);
|
|
}
|
|
|
|
pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **deltaenv,
|
|
const char *dir,
|
|
int fhin, int fhout, int fherr)
|
|
{
|
|
pid_t pid;
|
|
char *prog = path_lookup(cmd, 0);
|
|
|
|
if (!prog) {
|
|
errno = ENOENT;
|
|
pid = -1;
|
|
}
|
|
else {
|
|
const char *interpr = parse_interpreter(prog);
|
|
|
|
if (interpr) {
|
|
const char *argv0 = argv[0];
|
|
char *iprog = path_lookup(interpr, 1);
|
|
argv[0] = prog;
|
|
if (!iprog) {
|
|
errno = ENOENT;
|
|
pid = -1;
|
|
}
|
|
else {
|
|
pid = mingw_spawnve_fd(iprog, argv, deltaenv, dir, 1,
|
|
fhin, fhout, fherr);
|
|
free(iprog);
|
|
}
|
|
argv[0] = argv0;
|
|
}
|
|
else
|
|
pid = mingw_spawnve_fd(prog, argv, deltaenv, dir, 0,
|
|
fhin, fhout, fherr);
|
|
free(prog);
|
|
}
|
|
return pid;
|
|
}
|
|
|
|
static int try_shell_exec(const char *cmd, char *const *argv)
|
|
{
|
|
const char *interpr = parse_interpreter(cmd);
|
|
char *prog;
|
|
int pid = 0;
|
|
|
|
if (!interpr)
|
|
return 0;
|
|
prog = path_lookup(interpr, 1);
|
|
if (prog) {
|
|
int exec_id;
|
|
int argc = 0;
|
|
#ifndef _MSC_VER
|
|
const
|
|
#endif
|
|
char **argv2;
|
|
while (argv[argc]) argc++;
|
|
ALLOC_ARRAY(argv2, argc + 1);
|
|
argv2[0] = (char *)cmd; /* full path to the script file */
|
|
COPY_ARRAY(&argv2[1], &argv[1], argc);
|
|
exec_id = trace2_exec(prog, argv2);
|
|
pid = mingw_spawnv(prog, argv2, 1);
|
|
if (pid >= 0) {
|
|
int status;
|
|
if (waitpid(pid, &status, 0) < 0)
|
|
status = 255;
|
|
trace2_exec_result(exec_id, status);
|
|
exit(status);
|
|
}
|
|
trace2_exec_result(exec_id, -1);
|
|
pid = 1; /* indicate that we tried but failed */
|
|
free(prog);
|
|
free(argv2);
|
|
}
|
|
return pid;
|
|
}
|
|
|
|
int mingw_execv(const char *cmd, char *const *argv)
|
|
{
|
|
/* check if git_command is a shell script */
|
|
if (!try_shell_exec(cmd, argv)) {
|
|
int pid, status;
|
|
int exec_id;
|
|
|
|
exec_id = trace2_exec(cmd, (const char **)argv);
|
|
pid = mingw_spawnv(cmd, (const char **)argv, 0);
|
|
if (pid < 0) {
|
|
trace2_exec_result(exec_id, -1);
|
|
return -1;
|
|
}
|
|
if (waitpid(pid, &status, 0) < 0)
|
|
status = 255;
|
|
trace2_exec_result(exec_id, status);
|
|
exit(status);
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
int mingw_execvp(const char *cmd, char *const *argv)
|
|
{
|
|
char *prog = path_lookup(cmd, 0);
|
|
|
|
if (prog) {
|
|
mingw_execv(prog, argv);
|
|
free(prog);
|
|
} else
|
|
errno = ENOENT;
|
|
|
|
return -1;
|
|
}
|
|
|
|
int mingw_kill(pid_t pid, int sig)
|
|
{
|
|
if (pid > 0 && sig == SIGTERM) {
|
|
HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
|
|
|
|
if (TerminateProcess(h, -1)) {
|
|
CloseHandle(h);
|
|
return 0;
|
|
}
|
|
|
|
errno = err_win_to_posix(GetLastError());
|
|
CloseHandle(h);
|
|
return -1;
|
|
} else if (pid > 0 && sig == 0) {
|
|
HANDLE h = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid);
|
|
if (h) {
|
|
CloseHandle(h);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* UTF-8 versions of getenv(), putenv() and unsetenv().
|
|
* Internally, they use the CRT's stock UNICODE routines
|
|
* to avoid data loss.
|
|
*/
|
|
char *mingw_getenv(const char *name)
|
|
{
|
|
#define GETENV_MAX_RETAIN 64
|
|
static char *values[GETENV_MAX_RETAIN];
|
|
static int value_counter;
|
|
int len_key, len_value;
|
|
wchar_t *w_key;
|
|
char *value;
|
|
wchar_t w_value[32768];
|
|
|
|
if (!name || !*name)
|
|
return NULL;
|
|
|
|
len_key = strlen(name) + 1;
|
|
/* We cannot use xcalloc() here because that uses getenv() itself */
|
|
w_key = calloc(len_key, sizeof(wchar_t));
|
|
if (!w_key)
|
|
die("Out of memory, (tried to allocate %u wchar_t's)", len_key);
|
|
xutftowcs(w_key, name, len_key);
|
|
/* GetEnvironmentVariableW() only sets the last error upon failure */
|
|
SetLastError(ERROR_SUCCESS);
|
|
len_value = GetEnvironmentVariableW(w_key, w_value, ARRAY_SIZE(w_value));
|
|
if (!len_value && GetLastError() == ERROR_ENVVAR_NOT_FOUND) {
|
|
free(w_key);
|
|
return NULL;
|
|
}
|
|
free(w_key);
|
|
|
|
len_value = len_value * 3 + 1;
|
|
/* We cannot use xcalloc() here because that uses getenv() itself */
|
|
value = calloc(len_value, sizeof(char));
|
|
if (!value)
|
|
die("Out of memory, (tried to allocate %u bytes)", len_value);
|
|
xwcstoutf(value, w_value, len_value);
|
|
|
|
/*
|
|
* We return `value` which is an allocated value and the caller is NOT
|
|
* expecting to have to free it, so we keep a round-robin array,
|
|
* invalidating the buffer after GETENV_MAX_RETAIN getenv() calls.
|
|
*/
|
|
free(values[value_counter]);
|
|
values[value_counter++] = value;
|
|
if (value_counter >= ARRAY_SIZE(values))
|
|
value_counter = 0;
|
|
|
|
return value;
|
|
}
|
|
|
|
int mingw_putenv(const char *namevalue)
|
|
{
|
|
int size;
|
|
wchar_t *wide, *equal;
|
|
BOOL result;
|
|
|
|
if (!namevalue || !*namevalue)
|
|
return 0;
|
|
|
|
size = strlen(namevalue) * 2 + 1;
|
|
wide = calloc(size, sizeof(wchar_t));
|
|
if (!wide)
|
|
die("Out of memory, (tried to allocate %u wchar_t's)", size);
|
|
xutftowcs(wide, namevalue, size);
|
|
equal = wcschr(wide, L'=');
|
|
if (!equal)
|
|
result = SetEnvironmentVariableW(wide, NULL);
|
|
else {
|
|
*equal = L'\0';
|
|
result = SetEnvironmentVariableW(wide, equal + 1);
|
|
}
|
|
free(wide);
|
|
|
|
if (!result)
|
|
errno = err_win_to_posix(GetLastError());
|
|
|
|
return result ? 0 : -1;
|
|
}
|
|
|
|
static void ensure_socket_initialization(void)
|
|
{
|
|
WSADATA wsa;
|
|
static int initialized = 0;
|
|
|
|
if (initialized)
|
|
return;
|
|
|
|
if (WSAStartup(MAKEWORD(2,2), &wsa))
|
|
die("unable to initialize winsock subsystem, error %d",
|
|
WSAGetLastError());
|
|
|
|
atexit((void(*)(void)) WSACleanup);
|
|
initialized = 1;
|
|
}
|
|
|
|
#undef gethostname
|
|
int mingw_gethostname(char *name, int namelen)
|
|
{
|
|
ensure_socket_initialization();
|
|
return gethostname(name, namelen);
|
|
}
|
|
|
|
#undef gethostbyname
|
|
struct hostent *mingw_gethostbyname(const char *host)
|
|
{
|
|
ensure_socket_initialization();
|
|
return gethostbyname(host);
|
|
}
|
|
|
|
#undef getaddrinfo
|
|
int mingw_getaddrinfo(const char *node, const char *service,
|
|
const struct addrinfo *hints, struct addrinfo **res)
|
|
{
|
|
ensure_socket_initialization();
|
|
return getaddrinfo(node, service, hints, res);
|
|
}
|
|
|
|
int mingw_socket(int domain, int type, int protocol)
|
|
{
|
|
int sockfd;
|
|
SOCKET s;
|
|
|
|
ensure_socket_initialization();
|
|
s = WSASocket(domain, type, protocol, NULL, 0, 0);
|
|
if (s == INVALID_SOCKET) {
|
|
/*
|
|
* WSAGetLastError() values are regular BSD error codes
|
|
* biased by WSABASEERR.
|
|
* However, strerror() does not know about networking
|
|
* specific errors, which are values beginning at 38 or so.
|
|
* Therefore, we choose to leave the biased error code
|
|
* in errno so that _if_ someone looks up the code somewhere,
|
|
* then it is at least the number that are usually listed.
|
|
*/
|
|
errno = WSAGetLastError();
|
|
return -1;
|
|
}
|
|
/* convert into a file descriptor */
|
|
if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
|
|
closesocket(s);
|
|
return error("unable to make a socket file descriptor: %s",
|
|
strerror(errno));
|
|
}
|
|
return sockfd;
|
|
}
|
|
|
|
#undef connect
|
|
int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
|
|
{
|
|
SOCKET s = (SOCKET)_get_osfhandle(sockfd);
|
|
return connect(s, sa, sz);
|
|
}
|
|
|
|
#undef bind
|
|
int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
|
|
{
|
|
SOCKET s = (SOCKET)_get_osfhandle(sockfd);
|
|
return bind(s, sa, sz);
|
|
}
|
|
|
|
#undef setsockopt
|
|
int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
|
|
{
|
|
SOCKET s = (SOCKET)_get_osfhandle(sockfd);
|
|
return setsockopt(s, lvl, optname, (const char*)optval, optlen);
|
|
}
|
|
|
|
#undef shutdown
|
|
int mingw_shutdown(int sockfd, int how)
|
|
{
|
|
SOCKET s = (SOCKET)_get_osfhandle(sockfd);
|
|
return shutdown(s, how);
|
|
}
|
|
|
|
#undef listen
|
|
int mingw_listen(int sockfd, int backlog)
|
|
{
|
|
SOCKET s = (SOCKET)_get_osfhandle(sockfd);
|
|
return listen(s, backlog);
|
|
}
|
|
|
|
#undef accept
|
|
int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
|
|
{
|
|
int sockfd2;
|
|
|
|
SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
|
|
SOCKET s2 = accept(s1, sa, sz);
|
|
|
|
/* convert into a file descriptor */
|
|
if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
|
|
int err = errno;
|
|
closesocket(s2);
|
|
return error("unable to make a socket file descriptor: %s",
|
|
strerror(err));
|
|
}
|
|
return sockfd2;
|
|
}
|
|
|
|
#undef rename
|
|
int mingw_rename(const char *pold, const char *pnew)
|
|
{
|
|
DWORD attrs, gle;
|
|
int tries = 0;
|
|
wchar_t wpold[MAX_PATH], wpnew[MAX_PATH];
|
|
if (xutftowcs_path(wpold, pold) < 0 || xutftowcs_path(wpnew, pnew) < 0)
|
|
return -1;
|
|
|
|
/*
|
|
* Try native rename() first to get errno right.
|
|
* It is based on MoveFile(), which cannot overwrite existing files.
|
|
*/
|
|
if (!_wrename(wpold, wpnew))
|
|
return 0;
|
|
if (errno != EEXIST)
|
|
return -1;
|
|
repeat:
|
|
if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
|
|
return 0;
|
|
/* TODO: translate more errors */
|
|
gle = GetLastError();
|
|
if (gle == ERROR_ACCESS_DENIED &&
|
|
(attrs = GetFileAttributesW(wpnew)) != INVALID_FILE_ATTRIBUTES) {
|
|
if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
|
|
DWORD attrsold = GetFileAttributesW(wpold);
|
|
if (attrsold == INVALID_FILE_ATTRIBUTES ||
|
|
!(attrsold & FILE_ATTRIBUTE_DIRECTORY))
|
|
errno = EISDIR;
|
|
else if (!_wrmdir(wpnew))
|
|
goto repeat;
|
|
return -1;
|
|
}
|
|
if ((attrs & FILE_ATTRIBUTE_READONLY) &&
|
|
SetFileAttributesW(wpnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
|
|
if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
|
|
return 0;
|
|
gle = GetLastError();
|
|
/* revert file attributes on failure */
|
|
SetFileAttributesW(wpnew, attrs);
|
|
}
|
|
}
|
|
if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
|
|
/*
|
|
* We assume that some other process had the source or
|
|
* destination file open at the wrong moment and retry.
|
|
* In order to give the other process a higher chance to
|
|
* complete its operation, we give up our time slice now.
|
|
* If we have to retry again, we do sleep a bit.
|
|
*/
|
|
Sleep(delay[tries]);
|
|
tries++;
|
|
goto repeat;
|
|
}
|
|
if (gle == ERROR_ACCESS_DENIED &&
|
|
ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
|
|
"Should I try again?", pold, pnew))
|
|
goto repeat;
|
|
|
|
errno = EACCES;
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Note that this doesn't return the actual pagesize, but
|
|
* the allocation granularity. If future Windows specific git code
|
|
* needs the real getpagesize function, we need to find another solution.
|
|
*/
|
|
int mingw_getpagesize(void)
|
|
{
|
|
SYSTEM_INFO si;
|
|
GetSystemInfo(&si);
|
|
return si.dwAllocationGranularity;
|
|
}
|
|
|
|
/* See https://msdn.microsoft.com/en-us/library/windows/desktop/ms724435.aspx */
|
|
enum EXTENDED_NAME_FORMAT {
|
|
NameDisplay = 3,
|
|
NameUserPrincipal = 8
|
|
};
|
|
|
|
static char *get_extended_user_info(enum EXTENDED_NAME_FORMAT type)
|
|
{
|
|
DECLARE_PROC_ADDR(secur32.dll, BOOL, SEC_ENTRY, GetUserNameExW,
|
|
enum EXTENDED_NAME_FORMAT, LPCWSTR, PULONG);
|
|
static wchar_t wbuffer[1024];
|
|
DWORD len;
|
|
|
|
if (!INIT_PROC_ADDR(GetUserNameExW))
|
|
return NULL;
|
|
|
|
len = ARRAY_SIZE(wbuffer);
|
|
if (GetUserNameExW(type, wbuffer, &len)) {
|
|
char *converted = xmalloc((len *= 3));
|
|
if (xwcstoutf(converted, wbuffer, len) >= 0)
|
|
return converted;
|
|
free(converted);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
char *mingw_query_user_email(void)
|
|
{
|
|
return get_extended_user_info(NameUserPrincipal);
|
|
}
|
|
|
|
struct passwd *getpwuid(int uid)
|
|
{
|
|
static unsigned initialized;
|
|
static char user_name[100];
|
|
static struct passwd *p;
|
|
wchar_t buf[100];
|
|
DWORD len;
|
|
|
|
if (initialized)
|
|
return p;
|
|
|
|
len = ARRAY_SIZE(buf);
|
|
if (!GetUserNameW(buf, &len)) {
|
|
initialized = 1;
|
|
return NULL;
|
|
}
|
|
|
|
if (xwcstoutf(user_name, buf, sizeof(user_name)) < 0) {
|
|
initialized = 1;
|
|
return NULL;
|
|
}
|
|
|
|
p = xmalloc(sizeof(*p));
|
|
p->pw_name = user_name;
|
|
p->pw_gecos = get_extended_user_info(NameDisplay);
|
|
if (!p->pw_gecos)
|
|
p->pw_gecos = "unknown";
|
|
p->pw_dir = NULL;
|
|
|
|
initialized = 1;
|
|
return p;
|
|
}
|
|
|
|
static HANDLE timer_event;
|
|
static HANDLE timer_thread;
|
|
static int timer_interval;
|
|
static int one_shot;
|
|
static sig_handler_t timer_fn = SIG_DFL, sigint_fn = SIG_DFL;
|
|
|
|
/* The timer works like this:
|
|
* The thread, ticktack(), is a trivial routine that most of the time
|
|
* only waits to receive the signal to terminate. The main thread tells
|
|
* the thread to terminate by setting the timer_event to the signalled
|
|
* state.
|
|
* But ticktack() interrupts the wait state after the timer's interval
|
|
* length to call the signal handler.
|
|
*/
|
|
|
|
static unsigned __stdcall ticktack(void *dummy)
|
|
{
|
|
while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
|
|
mingw_raise(SIGALRM);
|
|
if (one_shot)
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int start_timer_thread(void)
|
|
{
|
|
timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
|
|
if (timer_event) {
|
|
timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
|
|
if (!timer_thread )
|
|
return errno = ENOMEM,
|
|
error("cannot start timer thread");
|
|
} else
|
|
return errno = ENOMEM,
|
|
error("cannot allocate resources for timer");
|
|
return 0;
|
|
}
|
|
|
|
static void stop_timer_thread(void)
|
|
{
|
|
if (timer_event)
|
|
SetEvent(timer_event); /* tell thread to terminate */
|
|
if (timer_thread) {
|
|
int rc = WaitForSingleObject(timer_thread, 10000);
|
|
if (rc == WAIT_TIMEOUT)
|
|
error("timer thread did not terminate timely");
|
|
else if (rc != WAIT_OBJECT_0)
|
|
error("waiting for timer thread failed: %lu",
|
|
GetLastError());
|
|
CloseHandle(timer_thread);
|
|
}
|
|
if (timer_event)
|
|
CloseHandle(timer_event);
|
|
timer_event = NULL;
|
|
timer_thread = NULL;
|
|
}
|
|
|
|
static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
|
|
{
|
|
return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
|
|
}
|
|
|
|
int setitimer(int type, struct itimerval *in, struct itimerval *out)
|
|
{
|
|
static const struct timeval zero;
|
|
static int atexit_done;
|
|
|
|
if (out)
|
|
return errno = EINVAL,
|
|
error("setitimer param 3 != NULL not implemented");
|
|
if (!is_timeval_eq(&in->it_interval, &zero) &&
|
|
!is_timeval_eq(&in->it_interval, &in->it_value))
|
|
return errno = EINVAL,
|
|
error("setitimer: it_interval must be zero or eq it_value");
|
|
|
|
if (timer_thread)
|
|
stop_timer_thread();
|
|
|
|
if (is_timeval_eq(&in->it_value, &zero) &&
|
|
is_timeval_eq(&in->it_interval, &zero))
|
|
return 0;
|
|
|
|
timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
|
|
one_shot = is_timeval_eq(&in->it_interval, &zero);
|
|
if (!atexit_done) {
|
|
atexit(stop_timer_thread);
|
|
atexit_done = 1;
|
|
}
|
|
return start_timer_thread();
|
|
}
|
|
|
|
int sigaction(int sig, struct sigaction *in, struct sigaction *out)
|
|
{
|
|
if (sig != SIGALRM)
|
|
return errno = EINVAL,
|
|
error("sigaction only implemented for SIGALRM");
|
|
if (out)
|
|
return errno = EINVAL,
|
|
error("sigaction: param 3 != NULL not implemented");
|
|
|
|
timer_fn = in->sa_handler;
|
|
return 0;
|
|
}
|
|
|
|
#undef signal
|
|
sig_handler_t mingw_signal(int sig, sig_handler_t handler)
|
|
{
|
|
sig_handler_t old;
|
|
|
|
switch (sig) {
|
|
case SIGALRM:
|
|
old = timer_fn;
|
|
timer_fn = handler;
|
|
break;
|
|
|
|
case SIGINT:
|
|
old = sigint_fn;
|
|
sigint_fn = handler;
|
|
break;
|
|
|
|
default:
|
|
return signal(sig, handler);
|
|
}
|
|
|
|
return old;
|
|
}
|
|
|
|
#undef raise
|
|
int mingw_raise(int sig)
|
|
{
|
|
switch (sig) {
|
|
case SIGALRM:
|
|
if (timer_fn == SIG_DFL) {
|
|
if (isatty(STDERR_FILENO))
|
|
fputs("Alarm clock\n", stderr);
|
|
exit(128 + SIGALRM);
|
|
} else if (timer_fn != SIG_IGN)
|
|
timer_fn(SIGALRM);
|
|
return 0;
|
|
|
|
case SIGINT:
|
|
if (sigint_fn == SIG_DFL)
|
|
exit(128 + SIGINT);
|
|
else if (sigint_fn != SIG_IGN)
|
|
sigint_fn(SIGINT);
|
|
return 0;
|
|
|
|
#if defined(_MSC_VER)
|
|
case SIGILL:
|
|
case SIGFPE:
|
|
case SIGSEGV:
|
|
case SIGTERM:
|
|
case SIGBREAK:
|
|
case SIGABRT:
|
|
case SIGABRT_COMPAT:
|
|
/*
|
|
* The <signal.h> header in the MS C Runtime defines 8 signals
|
|
* as being supported on the platform. Anything else causes an
|
|
* "Invalid signal or error" (which in DEBUG builds causes the
|
|
* Abort/Retry/Ignore dialog). We by-pass the CRT for things we
|
|
* already know will fail.
|
|
*/
|
|
return raise(sig);
|
|
default:
|
|
errno = EINVAL;
|
|
return -1;
|
|
|
|
#else
|
|
|
|
default:
|
|
return raise(sig);
|
|
|
|
#endif
|
|
|
|
}
|
|
}
|
|
|
|
int link(const char *oldpath, const char *newpath)
|
|
{
|
|
wchar_t woldpath[MAX_PATH], wnewpath[MAX_PATH];
|
|
if (xutftowcs_path(woldpath, oldpath) < 0 ||
|
|
xutftowcs_path(wnewpath, newpath) < 0)
|
|
return -1;
|
|
|
|
if (!CreateHardLinkW(wnewpath, woldpath, NULL)) {
|
|
errno = err_win_to_posix(GetLastError());
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
pid_t waitpid(pid_t pid, int *status, int options)
|
|
{
|
|
HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
|
|
FALSE, pid);
|
|
if (!h) {
|
|
errno = ECHILD;
|
|
return -1;
|
|
}
|
|
|
|
if (pid > 0 && options & WNOHANG) {
|
|
if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
|
|
CloseHandle(h);
|
|
return 0;
|
|
}
|
|
options &= ~WNOHANG;
|
|
}
|
|
|
|
if (options == 0) {
|
|
struct pinfo_t **ppinfo;
|
|
if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
|
|
CloseHandle(h);
|
|
return 0;
|
|
}
|
|
|
|
if (status)
|
|
GetExitCodeProcess(h, (LPDWORD)status);
|
|
|
|
EnterCriticalSection(&pinfo_cs);
|
|
|
|
ppinfo = &pinfo;
|
|
while (*ppinfo) {
|
|
struct pinfo_t *info = *ppinfo;
|
|
if (info->pid == pid) {
|
|
CloseHandle(info->proc);
|
|
*ppinfo = info->next;
|
|
free(info);
|
|
break;
|
|
}
|
|
ppinfo = &info->next;
|
|
}
|
|
|
|
LeaveCriticalSection(&pinfo_cs);
|
|
|
|
CloseHandle(h);
|
|
return pid;
|
|
}
|
|
CloseHandle(h);
|
|
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
|
|
int xutftowcsn(wchar_t *wcs, const char *utfs, size_t wcslen, int utflen)
|
|
{
|
|
int upos = 0, wpos = 0;
|
|
const unsigned char *utf = (const unsigned char*) utfs;
|
|
if (!utf || !wcs || wcslen < 1) {
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
/* reserve space for \0 */
|
|
wcslen--;
|
|
if (utflen < 0)
|
|
utflen = INT_MAX;
|
|
|
|
while (upos < utflen) {
|
|
int c = utf[upos++] & 0xff;
|
|
if (utflen == INT_MAX && c == 0)
|
|
break;
|
|
|
|
if (wpos >= wcslen) {
|
|
wcs[wpos] = 0;
|
|
errno = ERANGE;
|
|
return -1;
|
|
}
|
|
|
|
if (c < 0x80) {
|
|
/* ASCII */
|
|
wcs[wpos++] = c;
|
|
} else if (c >= 0xc2 && c < 0xe0 && upos < utflen &&
|
|
(utf[upos] & 0xc0) == 0x80) {
|
|
/* 2-byte utf-8 */
|
|
c = ((c & 0x1f) << 6);
|
|
c |= (utf[upos++] & 0x3f);
|
|
wcs[wpos++] = c;
|
|
} else if (c >= 0xe0 && c < 0xf0 && upos + 1 < utflen &&
|
|
!(c == 0xe0 && utf[upos] < 0xa0) && /* over-long encoding */
|
|
(utf[upos] & 0xc0) == 0x80 &&
|
|
(utf[upos + 1] & 0xc0) == 0x80) {
|
|
/* 3-byte utf-8 */
|
|
c = ((c & 0x0f) << 12);
|
|
c |= ((utf[upos++] & 0x3f) << 6);
|
|
c |= (utf[upos++] & 0x3f);
|
|
wcs[wpos++] = c;
|
|
} else if (c >= 0xf0 && c < 0xf5 && upos + 2 < utflen &&
|
|
wpos + 1 < wcslen &&
|
|
!(c == 0xf0 && utf[upos] < 0x90) && /* over-long encoding */
|
|
!(c == 0xf4 && utf[upos] >= 0x90) && /* > \u10ffff */
|
|
(utf[upos] & 0xc0) == 0x80 &&
|
|
(utf[upos + 1] & 0xc0) == 0x80 &&
|
|
(utf[upos + 2] & 0xc0) == 0x80) {
|
|
/* 4-byte utf-8: convert to \ud8xx \udcxx surrogate pair */
|
|
c = ((c & 0x07) << 18);
|
|
c |= ((utf[upos++] & 0x3f) << 12);
|
|
c |= ((utf[upos++] & 0x3f) << 6);
|
|
c |= (utf[upos++] & 0x3f);
|
|
c -= 0x10000;
|
|
wcs[wpos++] = 0xd800 | (c >> 10);
|
|
wcs[wpos++] = 0xdc00 | (c & 0x3ff);
|
|
} else if (c >= 0xa0) {
|
|
/* invalid utf-8 byte, printable unicode char: convert 1:1 */
|
|
wcs[wpos++] = c;
|
|
} else {
|
|
/* invalid utf-8 byte, non-printable unicode: convert to hex */
|
|
static const char *hex = "0123456789abcdef";
|
|
wcs[wpos++] = hex[c >> 4];
|
|
if (wpos < wcslen)
|
|
wcs[wpos++] = hex[c & 0x0f];
|
|
}
|
|
}
|
|
wcs[wpos] = 0;
|
|
return wpos;
|
|
}
|
|
|
|
int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen)
|
|
{
|
|
if (!wcs || !utf || utflen < 1) {
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
utflen = WideCharToMultiByte(CP_UTF8, 0, wcs, -1, utf, utflen, NULL, NULL);
|
|
if (utflen)
|
|
return utflen - 1;
|
|
errno = ERANGE;
|
|
return -1;
|
|
}
|
|
|
|
static void setup_windows_environment(void)
|
|
{
|
|
char *tmp = getenv("TMPDIR");
|
|
|
|
/* on Windows it is TMP and TEMP */
|
|
if (!tmp) {
|
|
if (!(tmp = getenv("TMP")))
|
|
tmp = getenv("TEMP");
|
|
if (tmp) {
|
|
setenv("TMPDIR", tmp, 1);
|
|
tmp = getenv("TMPDIR");
|
|
}
|
|
}
|
|
|
|
if (tmp) {
|
|
/*
|
|
* Convert all dir separators to forward slashes,
|
|
* to help shell commands called from the Git
|
|
* executable (by not mistaking the dir separators
|
|
* for escape characters).
|
|
*/
|
|
convert_slashes(tmp);
|
|
}
|
|
|
|
/* simulate TERM to enable auto-color (see color.c) */
|
|
if (!getenv("TERM"))
|
|
setenv("TERM", "cygwin", 1);
|
|
|
|
/* calculate HOME if not set */
|
|
if (!getenv("HOME")) {
|
|
/*
|
|
* try $HOMEDRIVE$HOMEPATH - the home share may be a network
|
|
* location, thus also check if the path exists (i.e. is not
|
|
* disconnected)
|
|
*/
|
|
if ((tmp = getenv("HOMEDRIVE"))) {
|
|
struct strbuf buf = STRBUF_INIT;
|
|
strbuf_addstr(&buf, tmp);
|
|
if ((tmp = getenv("HOMEPATH"))) {
|
|
strbuf_addstr(&buf, tmp);
|
|
if (is_directory(buf.buf))
|
|
setenv("HOME", buf.buf, 1);
|
|
else
|
|
tmp = NULL; /* use $USERPROFILE */
|
|
}
|
|
strbuf_release(&buf);
|
|
}
|
|
/* use $USERPROFILE if the home share is not available */
|
|
if (!tmp && (tmp = getenv("USERPROFILE")))
|
|
setenv("HOME", tmp, 1);
|
|
}
|
|
}
|
|
|
|
static PSID get_current_user_sid(void)
|
|
{
|
|
HANDLE token;
|
|
DWORD len = 0;
|
|
PSID result = NULL;
|
|
|
|
if (!OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, &token))
|
|
return NULL;
|
|
|
|
if (!GetTokenInformation(token, TokenUser, NULL, 0, &len)) {
|
|
TOKEN_USER *info = xmalloc((size_t)len);
|
|
if (GetTokenInformation(token, TokenUser, info, len, &len)) {
|
|
len = GetLengthSid(info->User.Sid);
|
|
result = xmalloc(len);
|
|
if (!CopySid(len, result, info->User.Sid)) {
|
|
error(_("failed to copy SID (%ld)"),
|
|
GetLastError());
|
|
FREE_AND_NULL(result);
|
|
}
|
|
}
|
|
FREE_AND_NULL(info);
|
|
}
|
|
CloseHandle(token);
|
|
|
|
return result;
|
|
}
|
|
|
|
static int acls_supported(const char *path)
|
|
{
|
|
size_t offset = offset_1st_component(path);
|
|
WCHAR wroot[MAX_PATH];
|
|
DWORD file_system_flags;
|
|
|
|
if (offset &&
|
|
xutftowcsn(wroot, path, MAX_PATH, offset) > 0 &&
|
|
GetVolumeInformationW(wroot, NULL, 0, NULL, NULL,
|
|
&file_system_flags, NULL, 0))
|
|
return !!(file_system_flags & FILE_PERSISTENT_ACLS);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int is_path_owned_by_current_sid(const char *path, struct strbuf *report)
|
|
{
|
|
WCHAR wpath[MAX_PATH];
|
|
PSID sid = NULL;
|
|
PSECURITY_DESCRIPTOR descriptor = NULL;
|
|
DWORD err;
|
|
|
|
static wchar_t home[MAX_PATH];
|
|
|
|
int result = 0;
|
|
|
|
if (xutftowcs_path(wpath, path) < 0)
|
|
return 0;
|
|
|
|
/*
|
|
* On Windows, the home directory is owned by the administrator, but for
|
|
* all practical purposes, it belongs to the user. Do pretend that it is
|
|
* owned by the user.
|
|
*/
|
|
if (!*home) {
|
|
DWORD size = ARRAY_SIZE(home);
|
|
DWORD len = GetEnvironmentVariableW(L"HOME", home, size);
|
|
if (!len || len > size)
|
|
wcscpy(home, L"::N/A::");
|
|
}
|
|
if (!wcsicmp(wpath, home))
|
|
return 1;
|
|
|
|
/* Get the owner SID */
|
|
err = GetNamedSecurityInfoW(wpath, SE_FILE_OBJECT,
|
|
OWNER_SECURITY_INFORMATION |
|
|
DACL_SECURITY_INFORMATION,
|
|
&sid, NULL, NULL, NULL, &descriptor);
|
|
|
|
if (err != ERROR_SUCCESS)
|
|
error(_("failed to get owner for '%s' (%ld)"), path, err);
|
|
else if (sid && IsValidSid(sid)) {
|
|
/* Now, verify that the SID matches the current user's */
|
|
static PSID current_user_sid;
|
|
BOOL is_member;
|
|
|
|
if (!current_user_sid)
|
|
current_user_sid = get_current_user_sid();
|
|
|
|
if (current_user_sid &&
|
|
IsValidSid(current_user_sid) &&
|
|
EqualSid(sid, current_user_sid))
|
|
result = 1;
|
|
else if (IsWellKnownSid(sid, WinBuiltinAdministratorsSid) &&
|
|
CheckTokenMembership(NULL, sid, &is_member) &&
|
|
is_member)
|
|
/*
|
|
* If owned by the Administrators group, and the
|
|
* current user is an administrator, we consider that
|
|
* okay, too.
|
|
*/
|
|
result = 1;
|
|
else if (report &&
|
|
IsWellKnownSid(sid, WinWorldSid) &&
|
|
!acls_supported(path)) {
|
|
/*
|
|
* On FAT32 volumes, ownership is not actually recorded.
|
|
*/
|
|
strbuf_addf(report, "'%s' is on a file system that does"
|
|
"not record ownership\n", path);
|
|
} else if (report) {
|
|
LPSTR str1, str2, to_free1 = NULL, to_free2 = NULL;
|
|
|
|
if (ConvertSidToStringSidA(sid, &str1))
|
|
to_free1 = str1;
|
|
else
|
|
str1 = "(inconvertible)";
|
|
|
|
if (!current_user_sid)
|
|
str2 = "(none)";
|
|
else if (!IsValidSid(current_user_sid))
|
|
str2 = "(invalid)";
|
|
else if (ConvertSidToStringSidA(current_user_sid, &str2))
|
|
to_free2 = str2;
|
|
else
|
|
str2 = "(inconvertible)";
|
|
strbuf_addf(report,
|
|
"'%s' is owned by:\n"
|
|
"\t'%s'\nbut the current user is:\n"
|
|
"\t'%s'\n", path, str1, str2);
|
|
LocalFree(to_free1);
|
|
LocalFree(to_free2);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* We can release the security descriptor struct only now because `sid`
|
|
* actually points into this struct.
|
|
*/
|
|
if (descriptor)
|
|
LocalFree(descriptor);
|
|
|
|
return result;
|
|
}
|
|
|
|
int is_valid_win32_path(const char *path, int allow_literal_nul)
|
|
{
|
|
const char *p = path;
|
|
int preceding_space_or_period = 0, i = 0, periods = 0;
|
|
|
|
if (!protect_ntfs)
|
|
return 1;
|
|
|
|
skip_dos_drive_prefix((char **)&path);
|
|
goto segment_start;
|
|
|
|
for (;;) {
|
|
char c = *(path++);
|
|
switch (c) {
|
|
case '\0':
|
|
case '/': case '\\':
|
|
/* cannot end in ` ` or `.`, except for `.` and `..` */
|
|
if (preceding_space_or_period &&
|
|
(i != periods || periods > 2))
|
|
return 0;
|
|
if (!c)
|
|
return 1;
|
|
|
|
i = periods = preceding_space_or_period = 0;
|
|
|
|
segment_start:
|
|
switch (*path) {
|
|
case 'a': case 'A': /* AUX */
|
|
if (((c = path[++i]) != 'u' && c != 'U') ||
|
|
((c = path[++i]) != 'x' && c != 'X')) {
|
|
not_a_reserved_name:
|
|
path += i;
|
|
continue;
|
|
}
|
|
break;
|
|
case 'c': case 'C':
|
|
/* COM1 ... COM9, CON, CONIN$, CONOUT$ */
|
|
if ((c = path[++i]) != 'o' && c != 'O')
|
|
goto not_a_reserved_name;
|
|
c = path[++i];
|
|
if (c == 'm' || c == 'M') { /* COM1 ... COM9 */
|
|
c = path[++i];
|
|
if (c < '1' || c > '9')
|
|
goto not_a_reserved_name;
|
|
} else if (c == 'n' || c == 'N') { /* CON */
|
|
c = path[i + 1];
|
|
if ((c == 'i' || c == 'I') &&
|
|
((c = path[i + 2]) == 'n' ||
|
|
c == 'N') &&
|
|
path[i + 3] == '$')
|
|
i += 3; /* CONIN$ */
|
|
else if ((c == 'o' || c == 'O') &&
|
|
((c = path[i + 2]) == 'u' ||
|
|
c == 'U') &&
|
|
((c = path[i + 3]) == 't' ||
|
|
c == 'T') &&
|
|
path[i + 4] == '$')
|
|
i += 4; /* CONOUT$ */
|
|
} else
|
|
goto not_a_reserved_name;
|
|
break;
|
|
case 'l': case 'L': /* LPT<N> */
|
|
if (((c = path[++i]) != 'p' && c != 'P') ||
|
|
((c = path[++i]) != 't' && c != 'T') ||
|
|
!isdigit(path[++i]))
|
|
goto not_a_reserved_name;
|
|
break;
|
|
case 'n': case 'N': /* NUL */
|
|
if (((c = path[++i]) != 'u' && c != 'U') ||
|
|
((c = path[++i]) != 'l' && c != 'L') ||
|
|
(allow_literal_nul &&
|
|
!path[i + 1] && p == path))
|
|
goto not_a_reserved_name;
|
|
break;
|
|
case 'p': case 'P': /* PRN */
|
|
if (((c = path[++i]) != 'r' && c != 'R') ||
|
|
((c = path[++i]) != 'n' && c != 'N'))
|
|
goto not_a_reserved_name;
|
|
break;
|
|
default:
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* So far, this looks like a reserved name. Let's see
|
|
* whether it actually is one: trailing spaces, a file
|
|
* extension, or an NTFS Alternate Data Stream do not
|
|
* matter, the name is still reserved if any of those
|
|
* follow immediately after the actual name.
|
|
*/
|
|
i++;
|
|
if (path[i] == ' ') {
|
|
preceding_space_or_period = 1;
|
|
while (path[++i] == ' ')
|
|
; /* skip all spaces */
|
|
}
|
|
|
|
c = path[i];
|
|
if (c && c != '.' && c != ':' && !is_xplatform_dir_sep(c))
|
|
goto not_a_reserved_name;
|
|
|
|
/* contains reserved name */
|
|
return 0;
|
|
case '.':
|
|
periods++;
|
|
/* fallthru */
|
|
case ' ':
|
|
preceding_space_or_period = 1;
|
|
i++;
|
|
continue;
|
|
case ':': /* DOS drive prefix was already skipped */
|
|
case '<': case '>': case '"': case '|': case '?': case '*':
|
|
/* illegal character */
|
|
return 0;
|
|
default:
|
|
if (c > '\0' && c < '\x20')
|
|
/* illegal character */
|
|
return 0;
|
|
}
|
|
preceding_space_or_period = 0;
|
|
i++;
|
|
}
|
|
}
|
|
|
|
#if !defined(_MSC_VER)
|
|
/*
|
|
* Disable MSVCRT command line wildcard expansion (__getmainargs called from
|
|
* mingw startup code, see init.c in mingw runtime).
|
|
*/
|
|
int _CRT_glob = 0;
|
|
#endif
|
|
|
|
static NORETURN void die_startup(void)
|
|
{
|
|
fputs("fatal: not enough memory for initialization", stderr);
|
|
exit(128);
|
|
}
|
|
|
|
static void *malloc_startup(size_t size)
|
|
{
|
|
void *result = malloc(size);
|
|
if (!result)
|
|
die_startup();
|
|
return result;
|
|
}
|
|
|
|
static char *wcstoutfdup_startup(char *buffer, const wchar_t *wcs, size_t len)
|
|
{
|
|
len = xwcstoutf(buffer, wcs, len) + 1;
|
|
return memcpy(malloc_startup(len), buffer, len);
|
|
}
|
|
|
|
static void maybe_redirect_std_handle(const wchar_t *key, DWORD std_id, int fd,
|
|
DWORD desired_access, DWORD flags)
|
|
{
|
|
DWORD create_flag = fd ? OPEN_ALWAYS : OPEN_EXISTING;
|
|
wchar_t buf[MAX_PATH];
|
|
DWORD max = ARRAY_SIZE(buf);
|
|
HANDLE handle;
|
|
DWORD ret = GetEnvironmentVariableW(key, buf, max);
|
|
|
|
if (!ret || ret >= max)
|
|
return;
|
|
|
|
/* make sure this does not leak into child processes */
|
|
SetEnvironmentVariableW(key, NULL);
|
|
if (!wcscmp(buf, L"off")) {
|
|
close(fd);
|
|
handle = GetStdHandle(std_id);
|
|
if (handle != INVALID_HANDLE_VALUE)
|
|
CloseHandle(handle);
|
|
return;
|
|
}
|
|
if (std_id == STD_ERROR_HANDLE && !wcscmp(buf, L"2>&1")) {
|
|
handle = GetStdHandle(STD_OUTPUT_HANDLE);
|
|
if (handle == INVALID_HANDLE_VALUE) {
|
|
close(fd);
|
|
handle = GetStdHandle(std_id);
|
|
if (handle != INVALID_HANDLE_VALUE)
|
|
CloseHandle(handle);
|
|
} else {
|
|
int new_fd = _open_osfhandle((intptr_t)handle, O_BINARY);
|
|
SetStdHandle(std_id, handle);
|
|
dup2(new_fd, fd);
|
|
/* do *not* close the new_fd: that would close stdout */
|
|
}
|
|
return;
|
|
}
|
|
handle = CreateFileW(buf, desired_access, 0, NULL, create_flag,
|
|
flags, NULL);
|
|
if (handle != INVALID_HANDLE_VALUE) {
|
|
int new_fd = _open_osfhandle((intptr_t)handle, O_BINARY);
|
|
SetStdHandle(std_id, handle);
|
|
dup2(new_fd, fd);
|
|
close(new_fd);
|
|
}
|
|
}
|
|
|
|
static void maybe_redirect_std_handles(void)
|
|
{
|
|
maybe_redirect_std_handle(L"GIT_REDIRECT_STDIN", STD_INPUT_HANDLE, 0,
|
|
GENERIC_READ, FILE_ATTRIBUTE_NORMAL);
|
|
maybe_redirect_std_handle(L"GIT_REDIRECT_STDOUT", STD_OUTPUT_HANDLE, 1,
|
|
GENERIC_WRITE, FILE_ATTRIBUTE_NORMAL);
|
|
maybe_redirect_std_handle(L"GIT_REDIRECT_STDERR", STD_ERROR_HANDLE, 2,
|
|
GENERIC_WRITE, FILE_FLAG_NO_BUFFERING);
|
|
}
|
|
|
|
#ifdef _MSC_VER
|
|
#ifdef _DEBUG
|
|
#include <crtdbg.h>
|
|
#endif
|
|
#endif
|
|
|
|
/*
|
|
* We implement wmain() and compile with -municode, which would
|
|
* normally ignore main(), but we call the latter from the former
|
|
* so that we can handle non-ASCII command-line parameters
|
|
* appropriately.
|
|
*
|
|
* To be more compatible with the core git code, we convert
|
|
* argv into UTF8 and pass them directly to main().
|
|
*/
|
|
int wmain(int argc, const wchar_t **wargv)
|
|
{
|
|
int i, maxlen, exit_status;
|
|
char *buffer, **save;
|
|
const char **argv;
|
|
|
|
trace2_initialize_clock();
|
|
|
|
#ifdef _MSC_VER
|
|
#ifdef _DEBUG
|
|
_CrtSetReportMode(_CRT_ASSERT, _CRTDBG_MODE_DEBUG);
|
|
#endif
|
|
|
|
#ifdef USE_MSVC_CRTDBG
|
|
_CrtSetDbgFlag(_CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF);
|
|
#endif
|
|
#endif
|
|
|
|
maybe_redirect_std_handles();
|
|
|
|
/* determine size of argv and environ conversion buffer */
|
|
maxlen = wcslen(wargv[0]);
|
|
for (i = 1; i < argc; i++)
|
|
maxlen = max(maxlen, wcslen(wargv[i]));
|
|
|
|
/* allocate buffer (wchar_t encodes to max 3 UTF-8 bytes) */
|
|
maxlen = 3 * maxlen + 1;
|
|
buffer = malloc_startup(maxlen);
|
|
|
|
/*
|
|
* Create a UTF-8 version of w_argv. Also create a "save" copy
|
|
* to remember all the string pointers because parse_options()
|
|
* will remove claimed items from the argv that we pass down.
|
|
*/
|
|
ALLOC_ARRAY(argv, argc + 1);
|
|
ALLOC_ARRAY(save, argc + 1);
|
|
for (i = 0; i < argc; i++)
|
|
argv[i] = save[i] = wcstoutfdup_startup(buffer, wargv[i], maxlen);
|
|
argv[i] = save[i] = NULL;
|
|
free(buffer);
|
|
|
|
/* fix Windows specific environment settings */
|
|
setup_windows_environment();
|
|
|
|
unset_environment_variables = xstrdup("PERL5LIB");
|
|
|
|
/* initialize critical section for waitpid pinfo_t list */
|
|
InitializeCriticalSection(&pinfo_cs);
|
|
|
|
/* set up default file mode and file modes for stdin/out/err */
|
|
_fmode = _O_BINARY;
|
|
_setmode(_fileno(stdin), _O_BINARY);
|
|
_setmode(_fileno(stdout), _O_BINARY);
|
|
_setmode(_fileno(stderr), _O_BINARY);
|
|
|
|
/* initialize Unicode console */
|
|
winansi_init();
|
|
|
|
/* invoke the real main() using our utf8 version of argv. */
|
|
exit_status = main(argc, argv);
|
|
|
|
for (i = 0; i < argc; i++)
|
|
free(save[i]);
|
|
free(save);
|
|
free(argv);
|
|
|
|
return exit_status;
|
|
}
|
|
|
|
int uname(struct utsname *buf)
|
|
{
|
|
unsigned v = (unsigned)GetVersion();
|
|
memset(buf, 0, sizeof(*buf));
|
|
xsnprintf(buf->sysname, sizeof(buf->sysname), "Windows");
|
|
xsnprintf(buf->release, sizeof(buf->release),
|
|
"%u.%u", v & 0xff, (v >> 8) & 0xff);
|
|
/* assuming NT variants only.. */
|
|
xsnprintf(buf->version, sizeof(buf->version),
|
|
"%u", (v >> 16) & 0x7fff);
|
|
return 0;
|
|
}
|