mirror of
https://github.com/git/git.git
synced 2024-11-28 20:44:04 +08:00
d1b6e6e015
The mingw-runtime implemenation of opendir, readdir and closedir
sets errno to 0 on success, something that POSIX explicitly
forbids. 3ba7a06 ("A loose object is not corrupt if it cannot be
read due to EMFILE") introduce a dependency on this behaviour,
leading to a broken "git clone" on Windows.
compat/mingw.c contains an implementation of readdir, and
compat/msvc.c contains implementations of opendir and closedir.
Move these to compat/win32/dirent.[ch], and change to our own DIR
structure at the same time.
This provides a generic Win32-implementation of opendir, readdir
and closedir which works on both MinGW and MSVC and does not reset
errno, and as a result git clone is working again on Windows.
Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
109 lines
2.4 KiB
C
109 lines
2.4 KiB
C
#include "../git-compat-util.h"
|
|
#include "dirent.h"
|
|
|
|
struct DIR {
|
|
struct dirent dd_dir; /* includes d_type */
|
|
HANDLE dd_handle; /* FindFirstFile handle */
|
|
int dd_stat; /* 0-based index */
|
|
char dd_name[1]; /* extend struct */
|
|
};
|
|
|
|
DIR *opendir(const char *name)
|
|
{
|
|
DWORD attrs = GetFileAttributesA(name);
|
|
int len;
|
|
DIR *p;
|
|
|
|
/* check for valid path */
|
|
if (attrs == INVALID_FILE_ATTRIBUTES) {
|
|
errno = ENOENT;
|
|
return NULL;
|
|
}
|
|
|
|
/* check if it's a directory */
|
|
if (!(attrs & FILE_ATTRIBUTE_DIRECTORY)) {
|
|
errno = ENOTDIR;
|
|
return NULL;
|
|
}
|
|
|
|
/* check that the pattern won't be too long for FindFirstFileA */
|
|
len = strlen(name);
|
|
if (is_dir_sep(name[len - 1]))
|
|
len--;
|
|
if (len + 2 >= MAX_PATH) {
|
|
errno = ENAMETOOLONG;
|
|
return NULL;
|
|
}
|
|
|
|
p = malloc(sizeof(DIR) + len + 2);
|
|
if (!p)
|
|
return NULL;
|
|
|
|
memset(p, 0, sizeof(DIR) + len + 2);
|
|
strcpy(p->dd_name, name);
|
|
p->dd_name[len] = '/';
|
|
p->dd_name[len+1] = '*';
|
|
|
|
p->dd_handle = INVALID_HANDLE_VALUE;
|
|
return p;
|
|
}
|
|
|
|
struct dirent *readdir(DIR *dir)
|
|
{
|
|
WIN32_FIND_DATAA buf;
|
|
HANDLE handle;
|
|
|
|
if (!dir || !dir->dd_handle) {
|
|
errno = EBADF; /* No set_errno for mingw */
|
|
return NULL;
|
|
}
|
|
|
|
if (dir->dd_handle == INVALID_HANDLE_VALUE && dir->dd_stat == 0) {
|
|
DWORD lasterr;
|
|
handle = FindFirstFileA(dir->dd_name, &buf);
|
|
lasterr = GetLastError();
|
|
dir->dd_handle = handle;
|
|
if (handle == INVALID_HANDLE_VALUE && (lasterr != ERROR_NO_MORE_FILES)) {
|
|
errno = err_win_to_posix(lasterr);
|
|
return NULL;
|
|
}
|
|
} else if (dir->dd_handle == INVALID_HANDLE_VALUE) {
|
|
return NULL;
|
|
} else if (!FindNextFileA(dir->dd_handle, &buf)) {
|
|
DWORD lasterr = GetLastError();
|
|
FindClose(dir->dd_handle);
|
|
dir->dd_handle = 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 */
|
|
dir->dd_dir.d_type = 0;
|
|
if (buf.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
|
|
dir->dd_dir.d_type |= DT_DIR;
|
|
else
|
|
dir->dd_dir.d_type |= DT_REG;
|
|
|
|
return &dir->dd_dir;
|
|
}
|
|
|
|
int closedir(DIR *dir)
|
|
{
|
|
if (!dir) {
|
|
errno = EBADF;
|
|
return -1;
|
|
}
|
|
|
|
if (dir->dd_handle != INVALID_HANDLE_VALUE)
|
|
FindClose(dir->dd_handle);
|
|
free(dir);
|
|
return 0;
|
|
}
|