// Sets the current directory to the given directory
bool SetCurrentDir(const std::string &directory)
{
#ifndef _XBOX
return __chdir(directory.c_str()) == 0;
#else
return false;
#endif
}
int chdir(const char *filename)
{
int e;
funcptr __chdir;
DPRINT(("chdir filename=%s \n", filename));
check_file(filename, CRUMB_ACCESS_TYPE_READ, CRUMB_ACCESS_TYPE_CHDIR);
__chdir = load_library_symbol("chdir");
if (__chdir == NULL) {
errno = ENOENT;
return -1;
}
DPRINT(("chdir = %p\n", __chdir));
e = __chdir(filename);
DPRINT(("chdir filename=%s e=%d\n", filename, e));
return e;
}
// Sets the current directory to the given directory
bool SetCurrentDir(const std::string &directory)
{
return __chdir(directory.c_str()) == 0;
}
ftw_startup (const char *dir, int is_nftw, void *func, int descriptors,
int flags)
{
struct ftw_data data;
struct STAT st;
int result = 0;
int save_err;
int cwdfd = -1;
char *cwd = NULL;
char *cp;
/* First make sure the parameters are reasonable. */
if (dir[0] == '\0')
{
__set_errno (ENOENT);
return -1;
}
data.maxdir = descriptors < 1 ? 1 : descriptors;
data.actdir = 0;
data.dirstreams = (struct dir_data **) alloca (data.maxdir
* sizeof (struct dir_data *));
memset (data.dirstreams, '\0', data.maxdir * sizeof (struct dir_data *));
/* PATH_MAX is always defined when we get here. */
data.dirbufsize = MAX (2 * strlen (dir), PATH_MAX);
data.dirbuf = (char *) malloc (data.dirbufsize);
if (data.dirbuf == NULL)
return -1;
cp = __stpcpy (data.dirbuf, dir);
/* Strip trailing slashes. */
while (cp > data.dirbuf + 1 && cp[-1] == '/')
--cp;
*cp = '\0';
data.ftw.level = 0;
/* Find basename. */
while (cp > data.dirbuf && cp[-1] != '/')
--cp;
data.ftw.base = cp - data.dirbuf;
data.flags = flags;
/* This assignment might seem to be strange but it is what we want.
The trick is that the first three arguments to the `ftw' and
`nftw' callback functions are equal. Therefore we can call in
every case the callback using the format of the `nftw' version
and get the correct result since the stack layout for a function
call in C allows this. */
data.func = (NFTW_FUNC_T) func;
/* Since we internally use the complete set of FTW_* values we need
to reduce the value range before calling a `ftw' callback. */
data.cvt_arr = is_nftw ? nftw_arr : ftw_arr;
/* No object known so far. */
data.known_objects = NULL;
/* Now go to the directory containing the initial file/directory. */
if (flags & FTW_CHDIR)
{
/* We have to be able to go back to the current working
directory. The best way to do this is to use a file
descriptor. */
cwdfd = __open (".", O_RDONLY | O_DIRECTORY);
if (cwdfd == -1)
{
/* Try getting the directory name. This can be needed if
the current directory is executable but not readable. */
if (errno == EACCES)
/* GNU extension ahead. */
cwd = __getcwd (NULL, 0);
if (cwd == NULL)
goto out_fail;
}
else if (data.maxdir > 1)
/* Account for the file descriptor we use here. */
--data.maxdir;
if (data.ftw.base > 0)
{
/* Change to the directory the file is in. In data.dirbuf
we have a writable copy of the file name. Just NUL
terminate it for now and change the directory. */
if (data.ftw.base == 1)
/* I.e., the file is in the root directory. */
result = __chdir ("/");
else
{
char ch = data.dirbuf[data.ftw.base - 1];
data.dirbuf[data.ftw.base - 1] = '\0';
result = __chdir (data.dirbuf);
data.dirbuf[data.ftw.base - 1] = ch;
}
}
}
/* Get stat info for start directory. */
if (result == 0)
{
const char *name;
if (data.flags & FTW_CHDIR)
{
name = data.dirbuf + data.ftw.base;
if (name[0] == '\0')
name = ".";
}
else
name = data.dirbuf;
if (((flags & FTW_PHYS)
? LXSTAT (_STAT_VER, name, &st)
: XSTAT (_STAT_VER, name, &st)) < 0)
{
if (!(flags & FTW_PHYS)
&& errno == ENOENT
&& LXSTAT (_STAT_VER, name, &st) == 0
&& S_ISLNK (st.st_mode))
result = (*data.func) (data.dirbuf, &st, data.cvt_arr[FTW_SLN],
&data.ftw);
else
/* No need to call the callback since we cannot say anything
about the object. */
result = -1;
}
else
{
if (S_ISDIR (st.st_mode))
{
/* Remember the device of the initial directory in case
FTW_MOUNT is given. */
data.dev = st.st_dev;
/* We know this directory now. */
if (!(flags & FTW_PHYS))
result = add_object (&data, &st);
if (result == 0)
result = ftw_dir (&data, &st, NULL);
}
else
{
int flag = S_ISLNK (st.st_mode) ? FTW_SL : FTW_F;
result = (*data.func) (data.dirbuf, &st, data.cvt_arr[flag],
&data.ftw);
}
}
if ((flags & FTW_ACTIONRETVAL)
&& (result == FTW_SKIP_SUBTREE || result == FTW_SKIP_SIBLINGS))
result = 0;
}
/* Return to the start directory (if necessary). */
if (cwdfd != -1)
{
int save_err = errno;
__fchdir (cwdfd);
__close_nocancel_nostatus (cwdfd);
__set_errno (save_err);
}
else if (cwd != NULL)
{
int save_err = errno;
__chdir (cwd);
free (cwd);
__set_errno (save_err);
}
/* Free all memory. */
out_fail:
save_err = errno;
__tdestroy (data.known_objects, free);
free (data.dirbuf);
__set_errno (save_err);
return result;
}
ftw_dir (struct ftw_data *data, struct STAT *st, struct dir_data *old_dir)
{
struct dir_data dir;
struct dirent64 *d;
int previous_base = data->ftw.base;
int result;
char *startp;
/* Open the stream for this directory. This might require that
another stream has to be closed. */
result = open_dir_stream (old_dir == NULL ? NULL : &old_dir->streamfd,
data, &dir);
if (result != 0)
{
if (errno == EACCES)
/* We cannot read the directory. Signal this with a special flag. */
result = (*data->func) (data->dirbuf, st, FTW_DNR, &data->ftw);
return result;
}
/* First, report the directory (if not depth-first). */
if (!(data->flags & FTW_DEPTH))
{
result = (*data->func) (data->dirbuf, st, FTW_D, &data->ftw);
if (result != 0)
{
int save_err;
fail:
save_err = errno;
__closedir (dir.stream);
dir.streamfd = -1;
__set_errno (save_err);
if (data->actdir-- == 0)
data->actdir = data->maxdir - 1;
data->dirstreams[data->actdir] = NULL;
return result;
}
}
/* If necessary, change to this directory. */
if (data->flags & FTW_CHDIR)
{
if (__fchdir (__dirfd (dir.stream)) < 0)
{
result = -1;
goto fail;
}
}
/* Next, update the `struct FTW' information. */
++data->ftw.level;
startp = __rawmemchr (data->dirbuf, '\0');
/* There always must be a directory name. */
assert (startp != data->dirbuf);
if (startp[-1] != '/')
*startp++ = '/';
data->ftw.base = startp - data->dirbuf;
while (dir.stream != NULL && (d = __readdir64 (dir.stream)) != NULL)
{
int d_type = DT_UNKNOWN;
#ifdef _DIRENT_HAVE_D_TYPE
d_type = d->d_type;
#endif
result = process_entry (data, &dir, d->d_name, NAMLEN (d), d_type);
if (result != 0)
break;
}
if (dir.stream != NULL)
{
/* The stream is still open. I.e., we did not need more
descriptors. Simply close the stream now. */
int save_err = errno;
assert (dir.content == NULL);
__closedir (dir.stream);
dir.streamfd = -1;
__set_errno (save_err);
if (data->actdir-- == 0)
data->actdir = data->maxdir - 1;
data->dirstreams[data->actdir] = NULL;
}
else
{
int save_err;
char *runp = dir.content;
while (result == 0 && *runp != '\0')
{
char *endp = strchr (runp, '\0');
// XXX Should store the d_type values as well?!
result = process_entry (data, &dir, runp, endp - runp, DT_UNKNOWN);
runp = endp + 1;
}
save_err = errno;
free (dir.content);
__set_errno (save_err);
}
if ((data->flags & FTW_ACTIONRETVAL) && result == FTW_SKIP_SIBLINGS)
result = 0;
/* Prepare the return, revert the `struct FTW' information. */
data->dirbuf[data->ftw.base - 1] = '\0';
--data->ftw.level;
data->ftw.base = previous_base;
/* Finally, if we process depth-first report the directory. */
if (result == 0 && (data->flags & FTW_DEPTH))
result = (*data->func) (data->dirbuf, st, FTW_DP, &data->ftw);
if (old_dir
&& (data->flags & FTW_CHDIR)
&& (result == 0
|| ((data->flags & FTW_ACTIONRETVAL)
&& (result != -1 && result != FTW_STOP))))
{
/* Change back to the parent directory. */
int done = 0;
if (old_dir->stream != NULL)
if (__fchdir (__dirfd (old_dir->stream)) == 0)
done = 1;
if (!done)
{
if (data->ftw.base == 1)
{
if (__chdir ("/") < 0)
result = -1;
}
else
if (__chdir ("..") < 0)
result = -1;
}
}
return result;
}
int
chdir(const char *path)
{
_gfs_hook_debug_v(fputs("Hooking chdir\n", stderr));
return (__chdir(path));
}
