git/compat/mingw.c
Johannes Sixt a6d15bc335 Do not use date.c:tm_to_time_t() from compat/mingw.c
To implement gettimeofday(), a broken-down UTC time was requested from the
system using GetSystemTime(), then tm_to_time_t() was used to convert it
to a time_t because it does not look at the current timezone, which
mktime() would do.

Use GetSystemTimeAsFileTime() and a different conversion path to avoid this
back-reference from the compatibility layer to the generic code.

Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-01-16 18:16:13 -08:00

1442 lines
37 KiB
C

#include "../git-compat-util.h"
#include "win32.h"
#include <conio.h>
#include "../strbuf.h"
int err_win_to_posix(DWORD winerr)
{
int error = ENOSYS;
switch(winerr) {
case ERROR_ACCESS_DENIED: error = EACCES; break;
case ERROR_ACCOUNT_DISABLED: error = EACCES; break;
case ERROR_ACCOUNT_RESTRICTION: error = EACCES; break;
case ERROR_ALREADY_ASSIGNED: error = EBUSY; break;
case ERROR_ALREADY_EXISTS: error = EEXIST; break;
case ERROR_ARITHMETIC_OVERFLOW: error = ERANGE; break;
case ERROR_BAD_COMMAND: error = EIO; break;
case ERROR_BAD_DEVICE: error = ENODEV; break;
case ERROR_BAD_DRIVER_LEVEL: error = ENXIO; break;
case ERROR_BAD_EXE_FORMAT: error = ENOEXEC; break;
case ERROR_BAD_FORMAT: error = ENOEXEC; break;
case ERROR_BAD_LENGTH: error = EINVAL; break;
case ERROR_BAD_PATHNAME: error = ENOENT; break;
case ERROR_BAD_PIPE: error = EPIPE; break;
case ERROR_BAD_UNIT: error = ENODEV; break;
case ERROR_BAD_USERNAME: error = EINVAL; break;
case ERROR_BROKEN_PIPE: error = EPIPE; break;
case ERROR_BUFFER_OVERFLOW: error = ENAMETOOLONG; break;
case ERROR_BUSY: error = EBUSY; break;
case ERROR_BUSY_DRIVE: error = EBUSY; break;
case ERROR_CALL_NOT_IMPLEMENTED: error = ENOSYS; break;
case ERROR_CANNOT_MAKE: error = EACCES; break;
case ERROR_CANTOPEN: error = EIO; break;
case ERROR_CANTREAD: error = EIO; break;
case ERROR_CANTWRITE: error = EIO; break;
case ERROR_CRC: error = EIO; break;
case ERROR_CURRENT_DIRECTORY: error = EACCES; break;
case ERROR_DEVICE_IN_USE: error = EBUSY; break;
case ERROR_DEV_NOT_EXIST: error = ENODEV; break;
case ERROR_DIRECTORY: error = EINVAL; break;
case ERROR_DIR_NOT_EMPTY: error = ENOTEMPTY; break;
case ERROR_DISK_CHANGE: error = EIO; break;
case ERROR_DISK_FULL: error = ENOSPC; break;
case ERROR_DRIVE_LOCKED: error = EBUSY; break;
case ERROR_ENVVAR_NOT_FOUND: error = EINVAL; break;
case ERROR_EXE_MARKED_INVALID: error = ENOEXEC; break;
case ERROR_FILENAME_EXCED_RANGE: error = ENAMETOOLONG; break;
case ERROR_FILE_EXISTS: error = EEXIST; break;
case ERROR_FILE_INVALID: error = ENODEV; break;
case ERROR_FILE_NOT_FOUND: error = ENOENT; break;
case ERROR_GEN_FAILURE: error = EIO; break;
case ERROR_HANDLE_DISK_FULL: error = ENOSPC; break;
case ERROR_INSUFFICIENT_BUFFER: error = ENOMEM; break;
case ERROR_INVALID_ACCESS: error = EACCES; break;
case ERROR_INVALID_ADDRESS: error = EFAULT; break;
case ERROR_INVALID_BLOCK: error = EFAULT; break;
case ERROR_INVALID_DATA: error = EINVAL; break;
case ERROR_INVALID_DRIVE: error = ENODEV; break;
case ERROR_INVALID_EXE_SIGNATURE: error = ENOEXEC; break;
case ERROR_INVALID_FLAGS: error = EINVAL; break;
case ERROR_INVALID_FUNCTION: error = ENOSYS; break;
case ERROR_INVALID_HANDLE: error = EBADF; break;
case ERROR_INVALID_LOGON_HOURS: error = EACCES; break;
case ERROR_INVALID_NAME: error = EINVAL; break;
case ERROR_INVALID_OWNER: error = EINVAL; break;
case ERROR_INVALID_PARAMETER: error = EINVAL; break;
case ERROR_INVALID_PASSWORD: error = EPERM; break;
case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break;
case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break;
case ERROR_INVALID_TARGET_HANDLE: error = EIO; break;
case ERROR_INVALID_WORKSTATION: error = EACCES; break;
case ERROR_IO_DEVICE: error = EIO; break;
case ERROR_IO_INCOMPLETE: error = EINTR; break;
case ERROR_LOCKED: error = EBUSY; break;
case ERROR_LOCK_VIOLATION: error = EACCES; break;
case ERROR_LOGON_FAILURE: error = EACCES; break;
case ERROR_MAPPED_ALIGNMENT: error = EINVAL; break;
case ERROR_META_EXPANSION_TOO_LONG: error = E2BIG; break;
case ERROR_MORE_DATA: error = EPIPE; break;
case ERROR_NEGATIVE_SEEK: error = ESPIPE; break;
case ERROR_NOACCESS: error = EFAULT; break;
case ERROR_NONE_MAPPED: error = EINVAL; break;
case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break;
case ERROR_NOT_READY: error = EAGAIN; break;
case ERROR_NOT_SAME_DEVICE: error = EXDEV; break;
case ERROR_NO_DATA: error = EPIPE; break;
case ERROR_NO_MORE_SEARCH_HANDLES: error = EIO; break;
case ERROR_NO_PROC_SLOTS: error = EAGAIN; break;
case ERROR_NO_SUCH_PRIVILEGE: error = EACCES; break;
case ERROR_OPEN_FAILED: error = EIO; break;
case ERROR_OPEN_FILES: error = EBUSY; break;
case ERROR_OPERATION_ABORTED: error = EINTR; break;
case ERROR_OUTOFMEMORY: error = ENOMEM; break;
case ERROR_PASSWORD_EXPIRED: error = EACCES; break;
case ERROR_PATH_BUSY: error = EBUSY; break;
case ERROR_PATH_NOT_FOUND: error = ENOENT; break;
case ERROR_PIPE_BUSY: error = EBUSY; break;
case ERROR_PIPE_CONNECTED: error = EPIPE; break;
case ERROR_PIPE_LISTENING: error = EPIPE; break;
case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break;
case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break;
case ERROR_READ_FAULT: error = EIO; break;
case ERROR_SEEK: error = EIO; break;
case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break;
case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break;
case ERROR_SHARING_VIOLATION: error = EACCES; break;
case ERROR_STACK_OVERFLOW: error = ENOMEM; break;
case ERROR_SWAPERROR: error = ENOENT; break;
case ERROR_TOO_MANY_MODULES: error = EMFILE; break;
case ERROR_TOO_MANY_OPEN_FILES: error = EMFILE; break;
case ERROR_UNRECOGNIZED_MEDIA: error = ENXIO; break;
case ERROR_UNRECOGNIZED_VOLUME: error = ENODEV; break;
case ERROR_WAIT_NO_CHILDREN: error = ECHILD; break;
case ERROR_WRITE_FAULT: error = EIO; break;
case ERROR_WRITE_PROTECT: error = EROFS; break;
}
return error;
}
#undef open
int mingw_open (const char *filename, int oflags, ...)
{
va_list args;
unsigned mode;
int fd;
va_start(args, oflags);
mode = va_arg(args, int);
va_end(args);
if (!strcmp(filename, "/dev/null"))
filename = "nul";
fd = open(filename, oflags, mode);
if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) {
DWORD attrs = GetFileAttributes(filename);
if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
errno = EISDIR;
}
return fd;
}
/*
* 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 time_t filetime_to_time_t(const FILETIME *ft)
{
return (time_t)(filetime_to_hnsec(ft) / 10000000);
}
/* 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.
*/
static int do_lstat(const char *file_name, struct stat *buf)
{
WIN32_FILE_ATTRIBUTE_DATA fdata;
if (!(errno = get_file_attr(file_name, &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 */
buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
return 0;
}
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.
*/
int mingw_lstat(const char *file_name, struct stat *buf)
{
int namelen;
static char alt_name[PATH_MAX];
if (!do_lstat(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(alt_name, buf);
}
#undef fstat
int mingw_fstat(int fd, struct stat *buf)
{
HANDLE fh = (HANDLE)_get_osfhandle(fd);
BY_HANDLE_FILE_INFORMATION fdata;
if (fh == INVALID_HANDLE_VALUE) {
errno = EBADF;
return -1;
}
/* direct non-file handles to MS's fstat() */
if (GetFileType(fh) != FILE_TYPE_DISK)
return _fstati64(fd, buf);
if (GetFileInformationByHandle(fh, &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 */
buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
return 0;
}
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 fh, rc;
/* must have write permission */
if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0)
return -1;
time_t_to_filetime(times->modtime, &mft);
time_t_to_filetime(times->actime, &aft);
if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
errno = EINVAL;
rc = -1;
} else
rc = 0;
close(fh);
return rc;
}
unsigned int sleep (unsigned int seconds)
{
Sleep(seconds*1000);
return 0;
}
int mkstemp(char *template)
{
char *filename = mktemp(template);
if (filename == NULL)
return -1;
return open(filename, O_RDWR | O_CREAT, 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((int)h[0], O_NOINHERIT);
if (filedes[0] < 0) {
CloseHandle(h[0]);
CloseHandle(h[1]);
return -1;
}
filedes[1] = _open_osfhandle((int)h[1], O_NOINHERIT);
if (filedes[0] < 0) {
close(filedes[0]);
CloseHandle(h[1]);
return -1;
}
return 0;
}
int poll(struct pollfd *ufds, unsigned int nfds, int timeout)
{
int i, pending;
if (timeout >= 0) {
if (nfds == 0) {
Sleep(timeout);
return 0;
}
return errno = EINVAL, error("poll timeout not supported");
}
/* When there is only one fd to wait for, then we pretend that
* input is available and let the actual wait happen when the
* caller invokes read().
*/
if (nfds == 1) {
if (!(ufds[0].events & POLLIN))
return errno = EINVAL, error("POLLIN not set");
ufds[0].revents = POLLIN;
return 0;
}
repeat:
pending = 0;
for (i = 0; i < nfds; i++) {
DWORD avail = 0;
HANDLE h = (HANDLE) _get_osfhandle(ufds[i].fd);
if (h == INVALID_HANDLE_VALUE)
return -1; /* errno was set */
if (!(ufds[i].events & POLLIN))
return errno = EINVAL, error("POLLIN not set");
/* this emulation works only for pipes */
if (!PeekNamedPipe(h, NULL, 0, NULL, &avail, NULL)) {
int err = GetLastError();
if (err == ERROR_BROKEN_PIPE) {
ufds[i].revents = POLLHUP;
pending++;
} else {
errno = EINVAL;
return error("PeekNamedPipe failed,"
" GetLastError: %u", err);
}
} else if (avail) {
ufds[i].revents = POLLIN;
pending++;
} else
ufds[i].revents = 0;
}
if (!pending) {
/* The only times that we spin here is when the process
* that is connected through the pipes is waiting for
* its own input data to become available. But since
* the process (pack-objects) is itself CPU intensive,
* it will happily pick up the time slice that we are
* relinquishing here.
*/
Sleep(0);
goto repeat;
}
return 0;
}
struct tm *gmtime_r(const time_t *timep, struct tm *result)
{
/* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
memcpy(result, gmtime(timep), sizeof(struct tm));
return result;
}
struct tm *localtime_r(const time_t *timep, struct tm *result)
{
/* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
memcpy(result, localtime(timep), sizeof(struct tm));
return result;
}
#undef getcwd
char *mingw_getcwd(char *pointer, int len)
{
int i;
char *ret = getcwd(pointer, len);
if (!ret)
return ret;
for (i = 0; pointer[i]; i++)
if (pointer[i] == '\\')
pointer[i] = '/';
return ret;
}
#undef getenv
char *mingw_getenv(const char *name)
{
char *result = getenv(name);
if (!result && !strcmp(name, "TMPDIR")) {
/* on Windows it is TMP and TEMP */
result = getenv("TMP");
if (!result)
result = getenv("TEMP");
}
return result;
}
/*
* See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
* (Parsing C++ Command-Line Arguments)
*/
static const char *quote_arg(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 == '"')
n += count*2 + 1;
continue;
}
len++;
p++;
}
if (!force_quotes && n == 0)
return arg;
/* insert \ where necessary */
d = q = xmalloc(len+n+3);
*d++ = '"';
while (*arg) {
if (*arg == '"')
*d++ = '\\';
else if (*arg == '\\') {
int count = 0;
while (*arg == '\\') {
count++;
*d++ = *arg++;
}
if (*arg == '"') {
while (count-- > 0)
*d++ = '\\';
*d++ = '\\';
}
}
*d++ = *arg++;
}
*d++ = '"';
*d++ = 0;
return q;
}
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;
}
/*
* Splits the PATH into parts.
*/
static char **get_path_split(void)
{
char *p, **path, *envpath = getenv("PATH");
int i, n = 0;
if (!envpath || !*envpath)
return NULL;
envpath = xstrdup(envpath);
p = envpath;
while (p) {
char *dir = p;
p = strchr(p, ';');
if (p) *p++ = '\0';
if (*dir) { /* not earlier, catches series of ; */
++n;
}
}
if (!n)
return NULL;
path = xmalloc((n+1)*sizeof(char *));
p = envpath;
i = 0;
do {
if (*p)
path[i++] = xstrdup(p);
p = p+strlen(p)+1;
} while (i < n);
path[i] = NULL;
free(envpath);
return path;
}
static void free_path_split(char **path)
{
char **p = path;
if (!path)
return;
while (*p)
free(*p++);
free(path);
}
/*
* 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, const char *cmd, int isexe, int exe_only)
{
char path[MAX_PATH];
snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
if (!isexe && access(path, F_OK) == 0)
return xstrdup(path);
path[strlen(path)-4] = '\0';
if ((!exe_only || isexe) && access(path, F_OK) == 0)
if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
return xstrdup(path);
return NULL;
}
/*
* Determines the absolute path of cmd using the the split path in path.
* If cmd contains a slash or backslash, no lookup is performed.
*/
static char *path_lookup(const char *cmd, char **path, int exe_only)
{
char *prog = NULL;
int len = strlen(cmd);
int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
if (strchr(cmd, '/') || strchr(cmd, '\\'))
prog = xstrdup(cmd);
while (!prog && *path)
prog = lookup_prog(*path++, cmd, isexe, exe_only);
return prog;
}
static int env_compare(const void *a, const void *b)
{
char *const *ea = a;
char *const *eb = b;
return strcasecmp(*ea, *eb);
}
static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
int prepend_cmd, int fhin, int fhout, int fherr)
{
STARTUPINFO si;
PROCESS_INFORMATION pi;
struct strbuf envblk, args;
unsigned flags;
BOOL ret;
/* Determine whether or not we are associated to a console */
HANDLE cons = CreateFile("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!
*/
flags = 0;
CloseHandle(cons);
}
memset(&si, 0, sizeof(si));
si.cb = sizeof(si);
si.dwFlags = STARTF_USESTDHANDLES;
si.hStdInput = (HANDLE) _get_osfhandle(fhin);
si.hStdOutput = (HANDLE) _get_osfhandle(fhout);
si.hStdError = (HANDLE) _get_osfhandle(fherr);
/* 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);
}
if (env) {
int count = 0;
char **e, **sorted_env;
for (e = env; *e; e++)
count++;
/* environment must be sorted */
sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
strbuf_init(&envblk, 0);
for (e = sorted_env; *e; e++) {
strbuf_addstr(&envblk, *e);
strbuf_addch(&envblk, '\0');
}
free(sorted_env);
}
memset(&pi, 0, sizeof(pi));
ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
env ? envblk.buf : NULL, NULL, &si, &pi);
if (env)
strbuf_release(&envblk);
strbuf_release(&args);
if (!ret) {
errno = ENOENT;
return -1;
}
CloseHandle(pi.hThread);
return (pid_t)pi.hProcess;
}
static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
int prepend_cmd)
{
return mingw_spawnve_fd(cmd, argv, env, prepend_cmd, 0, 1, 2);
}
pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
int fhin, int fhout, int fherr)
{
pid_t pid;
char **path = get_path_split();
char *prog = path_lookup(cmd, path, 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, path, 1);
argv[0] = prog;
if (!iprog) {
errno = ENOENT;
pid = -1;
}
else {
pid = mingw_spawnve_fd(iprog, argv, env, 1,
fhin, fhout, fherr);
free(iprog);
}
argv[0] = argv0;
}
else
pid = mingw_spawnve_fd(prog, argv, env, 0,
fhin, fhout, fherr);
free(prog);
}
free_path_split(path);
return pid;
}
static int try_shell_exec(const char *cmd, char *const *argv, char **env)
{
const char *interpr = parse_interpreter(cmd);
char **path;
char *prog;
int pid = 0;
if (!interpr)
return 0;
path = get_path_split();
prog = path_lookup(interpr, path, 1);
if (prog) {
int argc = 0;
const char **argv2;
while (argv[argc]) argc++;
argv2 = xmalloc(sizeof(*argv) * (argc+1));
argv2[0] = (char *)cmd; /* full path to the script file */
memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
pid = mingw_spawnve(prog, argv2, env, 1);
if (pid >= 0) {
int status;
if (waitpid(pid, &status, 0) < 0)
status = 255;
exit(status);
}
pid = 1; /* indicate that we tried but failed */
free(prog);
free(argv2);
}
free_path_split(path);
return pid;
}
static void mingw_execve(const char *cmd, char *const *argv, char *const *env)
{
/* check if git_command is a shell script */
if (!try_shell_exec(cmd, argv, (char **)env)) {
int pid, status;
pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0);
if (pid < 0)
return;
if (waitpid(pid, &status, 0) < 0)
status = 255;
exit(status);
}
}
void mingw_execvp(const char *cmd, char *const *argv)
{
char **path = get_path_split();
char *prog = path_lookup(cmd, path, 0);
if (prog) {
mingw_execve(prog, argv, environ);
free(prog);
} else
errno = ENOENT;
free_path_split(path);
}
static char **copy_environ(void)
{
char **env;
int i = 0;
while (environ[i])
i++;
env = xmalloc((i+1)*sizeof(*env));
for (i = 0; environ[i]; i++)
env[i] = xstrdup(environ[i]);
env[i] = NULL;
return env;
}
void free_environ(char **env)
{
int i;
for (i = 0; env[i]; i++)
free(env[i]);
free(env);
}
static int lookup_env(char **env, const char *name, size_t nmln)
{
int i;
for (i = 0; env[i]; i++) {
if (0 == strncmp(env[i], name, nmln)
&& '=' == env[i][nmln])
/* matches */
return i;
}
return -1;
}
/*
* If name contains '=', then sets the variable, otherwise it unsets it
*/
static char **env_setenv(char **env, const char *name)
{
char *eq = strchrnul(name, '=');
int i = lookup_env(env, name, eq-name);
if (i < 0) {
if (*eq) {
for (i = 0; env[i]; i++)
;
env = xrealloc(env, (i+2)*sizeof(*env));
env[i] = xstrdup(name);
env[i+1] = NULL;
}
}
else {
free(env[i]);
if (*eq)
env[i] = xstrdup(name);
else
for (; env[i]; i++)
env[i] = env[i+1];
}
return env;
}
/*
* Copies global environ and adjusts variables as specified by vars.
*/
char **make_augmented_environ(const char *const *vars)
{
char **env = copy_environ();
while (*vars)
env = env_setenv(env, *vars++);
return env;
}
/*
* Note, this isn't a complete replacement for getaddrinfo. It assumes
* that service contains a numerical port, or that it it is null. It
* does a simple search using gethostbyname, and returns one IPv4 host
* if one was found.
*/
static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
const struct addrinfo *hints,
struct addrinfo **res)
{
struct hostent *h = gethostbyname(node);
struct addrinfo *ai;
struct sockaddr_in *sin;
if (!h)
return WSAGetLastError();
ai = xmalloc(sizeof(struct addrinfo));
*res = ai;
ai->ai_flags = 0;
ai->ai_family = AF_INET;
ai->ai_socktype = hints->ai_socktype;
switch (hints->ai_socktype) {
case SOCK_STREAM:
ai->ai_protocol = IPPROTO_TCP;
break;
case SOCK_DGRAM:
ai->ai_protocol = IPPROTO_UDP;
break;
default:
ai->ai_protocol = 0;
break;
}
ai->ai_addrlen = sizeof(struct sockaddr_in);
ai->ai_canonname = strdup(h->h_name);
sin = xmalloc(ai->ai_addrlen);
memset(sin, 0, ai->ai_addrlen);
sin->sin_family = AF_INET;
if (service)
sin->sin_port = htons(atoi(service));
sin->sin_addr = *(struct in_addr *)h->h_addr;
ai->ai_addr = (struct sockaddr *)sin;
ai->ai_next = 0;
return 0;
}
static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
{
free(res->ai_canonname);
free(res->ai_addr);
free(res);
}
static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
char *host, DWORD hostlen,
char *serv, DWORD servlen, int flags)
{
const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
if (sa->sa_family != AF_INET)
return EAI_FAMILY;
if (!host && !serv)
return EAI_NONAME;
if (host && hostlen > 0) {
struct hostent *ent = NULL;
if (!(flags & NI_NUMERICHOST))
ent = gethostbyaddr((const char *)&sin->sin_addr,
sizeof(sin->sin_addr), AF_INET);
if (ent)
snprintf(host, hostlen, "%s", ent->h_name);
else if (flags & NI_NAMEREQD)
return EAI_NONAME;
else
snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
}
if (serv && servlen > 0) {
struct servent *ent = NULL;
if (!(flags & NI_NUMERICSERV))
ent = getservbyport(sin->sin_port,
flags & NI_DGRAM ? "udp" : "tcp");
if (ent)
snprintf(serv, servlen, "%s", ent->s_name);
else
snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
}
return 0;
}
static HMODULE ipv6_dll = NULL;
static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
const struct addrinfo *hints,
struct addrinfo **res);
static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
char *host, DWORD hostlen,
char *serv, DWORD servlen, int flags);
/*
* gai_strerror is an inline function in the ws2tcpip.h header, so we
* don't need to try to load that one dynamically.
*/
static void socket_cleanup(void)
{
WSACleanup();
if (ipv6_dll)
FreeLibrary(ipv6_dll);
ipv6_dll = NULL;
ipv6_freeaddrinfo = freeaddrinfo_stub;
ipv6_getaddrinfo = getaddrinfo_stub;
ipv6_getnameinfo = getnameinfo_stub;
}
static void ensure_socket_initialization(void)
{
WSADATA wsa;
static int initialized = 0;
const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
const char **name;
if (initialized)
return;
if (WSAStartup(MAKEWORD(2,2), &wsa))
die("unable to initialize winsock subsystem, error %d",
WSAGetLastError());
for (name = libraries; *name; name++) {
ipv6_dll = LoadLibrary(*name);
if (!ipv6_dll)
continue;
ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
GetProcAddress(ipv6_dll, "freeaddrinfo");
ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
const struct addrinfo *,
struct addrinfo **))
GetProcAddress(ipv6_dll, "getaddrinfo");
ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
socklen_t, char *, DWORD,
char *, DWORD, int))
GetProcAddress(ipv6_dll, "getnameinfo");
if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
FreeLibrary(ipv6_dll);
ipv6_dll = NULL;
} else
break;
}
if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
ipv6_freeaddrinfo = freeaddrinfo_stub;
ipv6_getaddrinfo = getaddrinfo_stub;
ipv6_getnameinfo = getnameinfo_stub;
}
atexit(socket_cleanup);
initialized = 1;
}
#undef gethostbyname
struct hostent *mingw_gethostbyname(const char *host)
{
ensure_socket_initialization();
return gethostbyname(host);
}
void mingw_freeaddrinfo(struct addrinfo *res)
{
ipv6_freeaddrinfo(res);
}
int mingw_getaddrinfo(const char *node, const char *service,
const struct addrinfo *hints, struct addrinfo **res)
{
ensure_socket_initialization();
return ipv6_getaddrinfo(node, service, hints, res);
}
int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
char *host, DWORD hostlen, char *serv, DWORD servlen,
int flags)
{
ensure_socket_initialization();
return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
}
int mingw_socket(int domain, int type, int protocol)
{
int sockfd;
SOCKET 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 rename
int mingw_rename(const char *pold, const char *pnew)
{
DWORD attrs, gle;
int tries = 0;
static const int delay[] = { 0, 1, 10, 20, 40 };
/*
* Try native rename() first to get errno right.
* It is based on MoveFile(), which cannot overwrite existing files.
*/
if (!rename(pold, pnew))
return 0;
if (errno != EEXIST)
return -1;
repeat:
if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
return 0;
/* TODO: translate more errors */
gle = GetLastError();
if (gle == ERROR_ACCESS_DENIED &&
(attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) {
if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
errno = EISDIR;
return -1;
}
if ((attrs & FILE_ATTRIBUTE_READONLY) &&
SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
return 0;
gle = GetLastError();
/* revert file attributes on failure */
SetFileAttributes(pnew, 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;
}
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;
}
struct passwd *getpwuid(int uid)
{
static char user_name[100];
static struct passwd p;
DWORD len = sizeof(user_name);
if (!GetUserName(user_name, &len))
return NULL;
p.pw_name = user_name;
p.pw_gecos = "unknown";
p.pw_dir = NULL;
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;
/* 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) {
if (timer_fn == SIG_DFL)
die("Alarm");
if (timer_fn != SIG_IGN)
timer_fn(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, 1000);
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 != NULL)
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 != NULL)
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 = timer_fn;
if (sig != SIGALRM)
return signal(sig, handler);
timer_fn = handler;
return old;
}
static const char *make_backslash_path(const char *path)
{
static char buf[PATH_MAX + 1];
char *c;
if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
die("Too long path: %.*s", 60, path);
for (c = buf; *c; c++) {
if (*c == '/')
*c = '\\';
}
return buf;
}
void mingw_open_html(const char *unixpath)
{
const char *htmlpath = make_backslash_path(unixpath);
typedef HINSTANCE (WINAPI *T)(HWND, const char *,
const char *, const char *, const char *, INT);
T ShellExecute;
HMODULE shell32;
shell32 = LoadLibrary("shell32.dll");
if (!shell32)
die("cannot load shell32.dll");
ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
if (!ShellExecute)
die("cannot run browser");
printf("Launching default browser to display HTML ...\n");
ShellExecute(NULL, "open", htmlpath, NULL, "\\", 0);
FreeLibrary(shell32);
}
int link(const char *oldpath, const char *newpath)
{
typedef BOOL (WINAPI *T)(const char*, const char*, LPSECURITY_ATTRIBUTES);
static T create_hard_link = NULL;
if (!create_hard_link) {
create_hard_link = (T) GetProcAddress(
GetModuleHandle("kernel32.dll"), "CreateHardLinkA");
if (!create_hard_link)
create_hard_link = (T)-1;
}
if (create_hard_link == (T)-1) {
errno = ENOSYS;
return -1;
}
if (!create_hard_link(newpath, oldpath, NULL)) {
errno = err_win_to_posix(GetLastError());
return -1;
}
return 0;
}
char *getpass(const char *prompt)
{
struct strbuf buf = STRBUF_INIT;
fputs(prompt, stderr);
for (;;) {
char c = _getch();
if (c == '\r' || c == '\n')
break;
strbuf_addch(&buf, c);
}
fputs("\n", stderr);
return strbuf_detach(&buf, NULL);
}
#ifndef NO_MINGW_REPLACE_READDIR
/* MinGW readdir implementation to avoid extra lstats for Git */
struct mingw_DIR
{
struct _finddata_t dd_dta; /* disk transfer area for this dir */
struct mingw_dirent dd_dir; /* Our own implementation, including d_type */
long dd_handle; /* _findnext handle */
int dd_stat; /* 0 = next entry to read is first entry, -1 = off the end, positive = 0 based index of next entry */
char dd_name[1]; /* given path for dir with search pattern (struct is extended) */
};
struct dirent *mingw_readdir(DIR *dir)
{
WIN32_FIND_DATAA buf;
HANDLE handle;
struct mingw_DIR *mdir = (struct mingw_DIR*)dir;
if (!dir->dd_handle) {
errno = EBADF; /* No set_errno for mingw */
return NULL;
}
if (dir->dd_handle == (long)INVALID_HANDLE_VALUE && dir->dd_stat == 0)
{
DWORD lasterr;
handle = FindFirstFileA(dir->dd_name, &buf);
lasterr = GetLastError();
dir->dd_handle = (long)handle;
if (handle == INVALID_HANDLE_VALUE && (lasterr != ERROR_NO_MORE_FILES)) {
errno = err_win_to_posix(lasterr);
return NULL;
}
} else if (dir->dd_handle == (long)INVALID_HANDLE_VALUE) {
return NULL;
} else if (!FindNextFileA((HANDLE)dir->dd_handle, &buf)) {
DWORD lasterr = GetLastError();
FindClose((HANDLE)dir->dd_handle);
dir->dd_handle = (long)INVALID_HANDLE_VALUE;
/* POSIX says you shouldn't set errno when readdir can't
find any more files; so, if another error we leave it set. */
if (lasterr != ERROR_NO_MORE_FILES)
errno = err_win_to_posix(lasterr);
return NULL;
}
/* We get here if `buf' contains valid data. */
strcpy(dir->dd_dir.d_name, buf.cFileName);
++dir->dd_stat;
/* Set file type, based on WIN32_FIND_DATA */
mdir->dd_dir.d_type = 0;
if (buf.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
mdir->dd_dir.d_type |= DT_DIR;
else
mdir->dd_dir.d_type |= DT_REG;
return (struct dirent*)&dir->dd_dir;
}
#endif // !NO_MINGW_REPLACE_READDIR