DirEntList list_dir (
const std::wstring &directory,
const UnaryCallback <const DirEnt &, bool> &filter,
const BinaryCallback <const DirEnt &, const DirEnt &, bool> &comp
)
{
DirEntList filelist;
std::string dirname = wstring_to_mbs (directory);
if (DIR *dir = ::opendir (dirname.c_str ())) {
DirEnt tmp_ent;
if (*c(dirname).rbegin() != '/') {
dirname += '/';
}
while (struct dirent *ent = readdir (dir)) {
tmp_ent.name = mbs_to_wstring (ent->d_name);
tmp_ent.attr = get_file_attr (dirname + ent->d_name);
if (!filter (tmp_ent)) {
filelist.push_back (std::move (tmp_ent));
}
}
closedir (dir);
// Sort them
filelist.sort (wrap (comp));
}
return filelist;
}
std::string find_executable (const std::string &exe)
{
std::string result;
if (exe.empty ()) {
// Empty input. Return empty string
}
else if (memchr (exe.data (), '/', exe.length ())) {
// exe is a full/relative pathname
if (exe[0] == '~') {
result = home_expand_pathname (exe);
}
else {
result = exe;
}
if ((get_file_attr (result) & (FILE_ATTR_DIRECTORY|FILE_ATTR_EXECUTABLE))
!= FILE_ATTR_EXECUTABLE) {
result.clear ();
}
}
else if (const char *path = getenv ("PATH")) {
// exe is a "bare" filename
for (;;) {
const char *colon = strchrnul (path, ':');
if (path == colon) {
result = '.';
}
else {
result.assign (path, colon);
}
result += '/';
result += exe;
if ((get_file_attr (result) & (FILE_ATTR_DIRECTORY|FILE_ATTR_EXECUTABLE))
== FILE_ATTR_EXECUTABLE) {
break;
}
if (*colon != ':') {
result.clear ();
break;
}
path = colon+1;
}
}
return result;
}
/* 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 mingw_stat *buf)
{
int err;
WIN32_FILE_ATTRIBUTE_DATA fdata;
if (!(err = get_file_attr(file_name, &fdata))) {
int len = strlen(file_name);
buf->st_ino = 0;
buf->st_uid = DEFAULT_UID;
buf->st_gid = DEFAULT_GID;
buf->st_nlink = 1;
buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
if (len > 4 && (!strcasecmp(file_name+len-4, ".exe") ||
!strcasecmp(file_name+len-4, ".com")))
buf->st_mode |= S_IEXEC;
buf->st_size = fdata.nFileSizeLow |
(((off64_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));
if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
WIN32_FIND_DATAA findbuf;
HANDLE handle = FindFirstFileA(file_name, &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);
}
}
/*
* Assume a block is 4096 bytes and calculate number of 512 byte
* sectors.
*/
buf->st_blksize = 4096;
buf->st_blocks = ((buf->st_size+4095)>>12)<<3;
return 0;
}
/* do_stat is a common implementation for cygwin_lstat and cygwin_stat.
*
* To simplify its logic, in the case of cygwin symlinks, this implementation
* falls back to the cygwin version of stat/lstat, which is provided as the
* last argument.
*/
static int do_stat(const char *file_name, struct stat *buf, stat_fn_t cygstat)
{
WIN32_FILE_ATTRIBUTE_DATA fdata;
if (file_name[0] == '/')
return cygstat (file_name, buf);
if (!(errno = get_file_attr(file_name, &fdata))) {
/*
* If the system attribute is set and it is not a directory then
* it could be a symbol link created in the nowinsymlinks mode.
* Normally, Cygwin works in the winsymlinks mode, so this situation
* is very unlikely. For the sake of simplicity of our code, let's
* Cygwin to handle it.
*/
if ((fdata.dwFileAttributes & FILE_ATTRIBUTE_SYSTEM) &&
!(fdata.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY))
return cygstat(file_name, buf);
/* fill out the stat structure */
buf->st_dev = buf->st_rdev = 0; /* not used by Git */
buf->st_ino = 0;
buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
buf->st_nlink = 1;
buf->st_uid = buf->st_gid = 0;
#ifdef __CYGWIN_USE_BIG_TYPES__
buf->st_size = ((_off64_t)fdata.nFileSizeHigh << 32) +
fdata.nFileSizeLow;
#else
buf->st_size = (off_t)fdata.nFileSizeLow;
#endif
buf->st_blocks = size_to_blocks(buf->st_size);
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;
} else if (errno == ENOENT) {
/*
* In the winsymlinks mode (which is the default), Cygwin
* emulates symbol links using Windows shortcut files. These
* files are formed by adding .lnk extension. So, if we have
* not found the specified file name, it could be that it is
* a symbol link. Let's Cygwin to deal with that.
*/
return cygstat(file_name, buf);
}
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.
*/
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; /* Can't use nFileSizeHigh, since it's not a stat64 */
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 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)
{
int err;
WIN32_FILE_ATTRIBUTE_DATA fdata;
if (!(err = 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));
if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
WIN32_FIND_DATAA findbuf;
HANDLE handle = FindFirstFileA(file_name, &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;
}
errno = err;
return -1;
}
unsigned get_file_attr (const wchar_t *name)
{
return get_file_attr (wstring_to_mbs (name).c_str ());
}