/*
* Copyright (C) 2009-2011 the libgit2 contributors
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
#include "posix.h"
#include "path.h"
#include "utf-conv.h"
#include <errno.h>
#include <io.h>
#include <fcntl.h>
int p_unlink(const char *path)
{
int ret = 0;
wchar_t* buf;
buf = gitwin_to_utf16(path);
_wchmod(buf, 0666);
ret = _wunlink(buf);
git__free(buf);
return ret;
}
int p_fsync(int fd)
{
HANDLE fh = (HANDLE)_get_osfhandle(fd);
if (fh == INVALID_HANDLE_VALUE) {
errno = EBADF;
return -1;
}
if (!FlushFileBuffers(fh)) {
DWORD code = GetLastError();
if (code == ERROR_INVALID_HANDLE)
errno = EINVAL;
else
errno = EIO;
return -1;
}
return 0;
}
GIT_INLINE(time_t) filetime_to_time_t(const FILETIME *ft)
{
long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
winTime -= 116444736000000000LL; /* Windows to Unix Epoch conversion */
winTime /= 10000000; /* Nano to seconds resolution */
return (time_t)winTime;
}
static int do_lstat(const char *file_name, struct stat *buf)
{
WIN32_FILE_ATTRIBUTE_DATA fdata;
wchar_t* fbuf = gitwin_to_utf16(file_name);
if (GetFileAttributesExW(fbuf, GetFileExInfoStandard, &fdata)) {
int fMode = S_IREAD;
if (fdata.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
fMode |= S_IFDIR;
else
fMode |= S_IFREG;
if (!(fdata.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
fMode |= S_IWRITE;
if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT)
fMode |= S_IFLNK;
buf->st_ino = 0;
buf->st_gid = 0;
buf->st_uid = 0;
buf->st_nlink = 1;
buf->st_mode = (mode_t)fMode;
buf->st_size = ((git_off_t)fdata.nFileSizeHigh << 32) + fdata.nFileSizeLow;
buf->st_dev = buf->st_rdev = (_getdrive() - 1);
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));
git__free(fbuf);
return GIT_SUCCESS;
}
git__free(fbuf);
switch (GetLastError()) {
case ERROR_ACCESS_DENIED:
case ERROR_SHARING_VIOLATION:
case ERROR_LOCK_VIOLATION:
case ERROR_SHARING_BUFFER_EXCEEDED:
return GIT_EOSERR;
case ERROR_BUFFER_OVERFLOW:
case ERROR_NOT_ENOUGH_MEMORY:
return GIT_ENOMEM;
default:
return GIT_EINVALIDPATH;
}
}
int p_lstat(const char *file_name, struct stat *buf)
{
int namelen, error;
char alt_name[GIT_PATH_MAX];
if ((error = do_lstat(file_name, buf)) == GIT_SUCCESS)
return GIT_SUCCESS;
/* if file_name ended in a '/', Windows returned ENOENT;
* try again without trailing slashes
*/
if (error != GIT_EINVALIDPATH)
return git__throw(GIT_EOSERR, "Failed to lstat file");
namelen = strlen(file_name);
if (namelen && file_name[namelen-1] != '/')
return git__throw(GIT_EOSERR, "Failed to lstat file");
while (namelen && file_name[namelen-1] == '/')
--namelen;
if (!namelen || namelen >= GIT_PATH_MAX)
return git__throw(GIT_ENOMEM, "Failed to lstat file");
memcpy(alt_name, file_name, namelen);
alt_name[namelen] = 0;
return do_lstat(alt_name, buf);
}
int p_readlink(const char *link, char *target, size_t target_len)
{
typedef DWORD (WINAPI *fpath_func)(HANDLE, LPWSTR, DWORD, DWORD);
static fpath_func pGetFinalPath = NULL;
HANDLE hFile;
DWORD dwRet;
wchar_t* link_w;
wchar_t* target_w;
/*
* Try to load the pointer to pGetFinalPath dynamically, because
* it is not available in platforms older than Vista
*/
if (pGetFinalPath == NULL) {
HINSTANCE library = LoadLibrary("kernel32");
if (library != NULL)
pGetFinalPath = (fpath_func)GetProcAddress(library, "GetFinalPathNameByHandleW");
if (pGetFinalPath == NULL)
return git__throw(GIT_EOSERR,
"'GetFinalPathNameByHandleW' is not available in this platform");
}
link_w = gitwin_to_utf16(link);
hFile = CreateFileW(link_w, // file to open
GENERIC_READ, // open for reading
FILE_SHARE_READ, // share for reading
NULL, // default security
OPEN_EXISTING, // existing file only
FILE_FLAG_BACKUP_SEMANTICS, // normal file
NULL); // no attr. template
git__free(link_w);
if (hFile == INVALID_HANDLE_VALUE)
return GIT_EOSERR;
if (target_len <= 0) {
return GIT_EINVALIDARGS;
}
target_w = (wchar_t*)git__malloc(target_len * sizeof(wchar_t));
dwRet = pGetFinalPath(hFile, target_w, target_len, 0x0);
if (dwRet >= target_len) {
git__free(target_w);
CloseHandle(hFile);
return GIT_ENOMEM;
}
if (!WideCharToMultiByte(CP_UTF8, 0, target_w, -1, target, target_len * sizeof(char), NULL, NULL)) {
git__free(target_w);
return GIT_EOSERR;
}
git__free(target_w);
CloseHandle(hFile);
if (dwRet > 4) {
/* Skip first 4 characters if they are "\\?\" */
if (target[0] == '\\' && target[1] == '\\' && target[2] == '?' && target[3] == '\\') {
char tmp[GIT_PATH_MAX];
unsigned int offset = 4;
dwRet -= 4;
/* \??\UNC\ */
if (dwRet > 7 && target[4] == 'U' && target[5] == 'N' && target[6] == 'C') {
offset += 2;
dwRet -= 2;
target[offset] = '\\';
}
memcpy(tmp, target + offset, dwRet);
memcpy(target, tmp, dwRet);
}
}
target[dwRet] = '\0';
return dwRet;
}
int p_open(const char *path, int flags)
{
int fd;
wchar_t* buf = gitwin_to_utf16(path);
fd = _wopen(buf, flags | _O_BINARY);
git__free(buf);
return fd;
}
int p_creat(const char *path, mode_t mode)
{
int fd;
wchar_t* buf = gitwin_to_utf16(path);
fd = _wopen(buf, _O_WRONLY | _O_CREAT | _O_TRUNC | _O_BINARY, mode);
git__free(buf);
return fd;
}
int p_getcwd(char *buffer_out, size_t size)
{
wchar_t* buf = (wchar_t*)git__malloc(sizeof(wchar_t) * (int)size);
_wgetcwd(buf, (int)size);
if (!WideCharToMultiByte(CP_UTF8, 0, buf, -1, buffer_out, size, NULL, NULL)) {
git__free(buf);
return GIT_EOSERR;
}
git__free(buf);
return GIT_SUCCESS;
}
int p_stat(const char* path, struct stat* buf)
{
return do_lstat(path, buf);
}
int p_chdir(const char* path)
{
wchar_t* buf = gitwin_to_utf16(path);
int ret = _wchdir(buf);
git__free(buf);
return ret;
}
int p_chmod(const char* path, mode_t mode)
{
wchar_t* buf = gitwin_to_utf16(path);
int ret = _wchmod(buf, mode);
git__free(buf);
return ret;
}
int p_rmdir(const char* path)
{
wchar_t* buf = gitwin_to_utf16(path);
int ret = _wrmdir(buf);
git__free(buf);
return ret;
}
int p_hide_directory__w32(const char *path)
{
int error;
wchar_t* buf = gitwin_to_utf16(path);
error = SetFileAttributesW(buf, FILE_ATTRIBUTE_HIDDEN) != 0 ?
GIT_SUCCESS : GIT_ERROR; /* MSDN states a "non zero" value indicates a success */
git__free(buf);
if (error < GIT_SUCCESS)
error = git__throw(GIT_EOSERR, "Failed to hide directory '%s'", path);
return error;
}
char *p_realpath(const char *orig_path, char *buffer)
{
int ret;
wchar_t* orig_path_w = gitwin_to_utf16(orig_path);
wchar_t* buffer_w = (wchar_t*)git__malloc(GIT_PATH_MAX * sizeof(wchar_t));
ret = GetFullPathNameW(orig_path_w, GIT_PATH_MAX, buffer_w, NULL);
git__free(orig_path_w);
if (!ret || ret > GIT_PATH_MAX) {
buffer = NULL;
goto done;
}
if (buffer == NULL) {
int buffer_sz = WideCharToMultiByte(CP_UTF8, 0, buffer_w, -1, NULL, 0, NULL, NULL);
if (!buffer_sz ||
!(buffer = (char *)git__malloc(buffer_sz)) ||
!WideCharToMultiByte(CP_UTF8, 0, buffer_w, -1, buffer, buffer_sz, NULL, NULL))
{
git__free(buffer);
buffer = NULL;
}
} else {
if (!WideCharToMultiByte(CP_UTF8, 0, buffer_w, -1, buffer, GIT_PATH_MAX, NULL, NULL))
buffer = NULL;
}
done:
git__free(buffer_w);
if (buffer)
git_path_mkposix(buffer);
return buffer;
}
int p_vsnprintf(char *buffer, size_t count, const char *format, va_list argptr)
{
#ifdef _MSC_VER
int len = _vsnprintf(buffer, count, format, argptr);
return (len < 0) ? _vscprintf(format, argptr) : len;
#else /* MinGW */
return vsnprintf(buffer, count, format, argptr);
#endif
}
int p_snprintf(char *buffer, size_t count, const char *format, ...)
{
va_list va;
int r;
va_start(va, format);
r = p_vsnprintf(buffer, count, format, va);
va_end(va);
return r;
}
extern int p_creat(const char *path, mode_t mode);
int p_mkstemp(char *tmp_path)
{
#if defined(_MSC_VER)
if (_mktemp_s(tmp_path, strlen(tmp_path) + 1) != 0)
return GIT_EOSERR;
#else
if (_mktemp(tmp_path) == NULL)
return GIT_EOSERR;
#endif
return p_creat(tmp_path, 0744);
}
int p_setenv(const char* name, const char* value, int overwrite)
{
if (overwrite != 1)
return EINVAL;
return (SetEnvironmentVariableA(name, value) == 0 ? GIT_EOSERR : GIT_SUCCESS);
}
int p_access(const char* path, mode_t mode)
{
wchar_t *buf = gitwin_to_utf16(path);
int ret;
ret = _waccess(buf, mode);
git__free(buf);
return ret;
}
extern int p_rename(const char *from, const char *to)
{
wchar_t *wfrom = gitwin_to_utf16(from);
wchar_t *wto = gitwin_to_utf16(to);
int ret;
ret = MoveFileExW(wfrom, wto, MOVEFILE_REPLACE_EXISTING | MOVEFILE_COPY_ALLOWED) ? GIT_SUCCESS : GIT_EOSERR;
git__free(wfrom);
git__free(wto);
return ret;
}
