mirror of
https://github.com/git/git
synced 2024-08-27 19:49:21 +00:00
![Karsten Blees](/assets/img/avatar_default.png)
Changes opendir/readdir to use Windows Unicode APIs and convert between UTF-8/UTF-16. Removes parameter checks that are already covered by xutftowcs_path. This changes detection of ENAMETOOLONG from MAX_PATH - 2 to MAX_PATH (matching is_dir_empty in mingw.c). If name + "/*" or the resulting absolute path is too long, FindFirstFile fails and errno is set through err_win_to_posix. Increases the size of dirent.d_name to accommodate the full WIN32_FIND_DATA.cFileName converted to UTF-8 (UTF-16 to UTF-8 conversion may grow by factor three in the worst case). Signed-off-by: Karsten Blees <blees@dcon.de> Signed-off-by: Stepan Kasal <kasal@ucw.cz> Signed-off-by: Junio C Hamano <gitster@pobox.com>
93 lines
2.1 KiB
C
93 lines
2.1 KiB
C
#include "../../git-compat-util.h"
|
|
|
|
struct DIR {
|
|
struct dirent dd_dir; /* includes d_type */
|
|
HANDLE dd_handle; /* FindFirstFile handle */
|
|
int dd_stat; /* 0-based index */
|
|
};
|
|
|
|
static inline void finddata2dirent(struct dirent *ent, WIN32_FIND_DATAW *fdata)
|
|
{
|
|
/* convert UTF-16 name to UTF-8 */
|
|
xwcstoutf(ent->d_name, fdata->cFileName, sizeof(ent->d_name));
|
|
|
|
/* Set file type, based on WIN32_FIND_DATA */
|
|
if (fdata->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
|
|
ent->d_type = DT_DIR;
|
|
else
|
|
ent->d_type = DT_REG;
|
|
}
|
|
|
|
DIR *opendir(const char *name)
|
|
{
|
|
wchar_t pattern[MAX_PATH + 2]; /* + 2 for '/' '*' */
|
|
WIN32_FIND_DATAW fdata;
|
|
HANDLE h;
|
|
int len;
|
|
DIR *dir;
|
|
|
|
/* convert name to UTF-16 and check length < MAX_PATH */
|
|
if ((len = xutftowcs_path(pattern, name)) < 0)
|
|
return NULL;
|
|
|
|
/* append optional '/' and wildcard '*' */
|
|
if (len && !is_dir_sep(pattern[len - 1]))
|
|
pattern[len++] = '/';
|
|
pattern[len++] = '*';
|
|
pattern[len] = 0;
|
|
|
|
/* open find handle */
|
|
h = FindFirstFileW(pattern, &fdata);
|
|
if (h == INVALID_HANDLE_VALUE) {
|
|
DWORD err = GetLastError();
|
|
errno = (err == ERROR_DIRECTORY) ? ENOTDIR : err_win_to_posix(err);
|
|
return NULL;
|
|
}
|
|
|
|
/* initialize DIR structure and copy first dir entry */
|
|
dir = xmalloc(sizeof(DIR));
|
|
dir->dd_handle = h;
|
|
dir->dd_stat = 0;
|
|
finddata2dirent(&dir->dd_dir, &fdata);
|
|
return dir;
|
|
}
|
|
|
|
struct dirent *readdir(DIR *dir)
|
|
{
|
|
if (!dir) {
|
|
errno = EBADF; /* No set_errno for mingw */
|
|
return NULL;
|
|
}
|
|
|
|
/* if first entry, dirent has already been set up by opendir */
|
|
if (dir->dd_stat) {
|
|
/* get next entry and convert from WIN32_FIND_DATA to dirent */
|
|
WIN32_FIND_DATAW fdata;
|
|
if (FindNextFileW(dir->dd_handle, &fdata)) {
|
|
finddata2dirent(&dir->dd_dir, &fdata);
|
|
} else {
|
|
DWORD lasterr = GetLastError();
|
|
/* 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;
|
|
}
|
|
}
|
|
|
|
++dir->dd_stat;
|
|
return &dir->dd_dir;
|
|
}
|
|
|
|
int closedir(DIR *dir)
|
|
{
|
|
if (!dir) {
|
|
errno = EBADF;
|
|
return -1;
|
|
}
|
|
|
|
FindClose(dir->dd_handle);
|
|
free(dir);
|
|
return 0;
|
|
}
|