/* Close all file descriptors except the one specified. */
static void
close_all_fds (void)
{
DIR *dir = __opendir ("/proc/self/fd");
if (dir != NULL)
{
struct dirent64 *d;
while ((d = __readdir64 (dir)) != NULL)
if (isdigit (d->d_name[0]))
{
char *endp;
long int fd = strtol (d->d_name, &endp, 10);
if (*endp == '\0' && fd != PTY_FILENO && fd != dirfd (dir))
__close_nocancel_nostatus (fd);
}
__closedir (dir);
int nullfd = __open_nocancel (_PATH_DEVNULL, O_RDONLY);
assert (nullfd == STDIN_FILENO);
nullfd = __open_nocancel (_PATH_DEVNULL, O_WRONLY);
assert (nullfd == STDOUT_FILENO);
__dup2 (STDOUT_FILENO, STDERR_FILENO);
}
}
int
scandir (const char *dir, struct dirent ***namelist,
int (*select) (const struct dirent *),
int (*cmp) (const struct dirent **, const struct dirent **))
{
return __scandir_tail (__opendir (dir), namelist, select, cmp);
}
internal_function attribute_compat_text_section
getttyname (const char *dev, dev_t mydev, ino64_t myino, int save, int *dostat)
{
static size_t namelen;
struct stat64 st;
DIR *dirstream;
struct dirent64 *d;
size_t devlen = strlen (dev) + 1;
dirstream = __opendir (dev);
if (dirstream == NULL)
{
*dostat = -1;
return NULL;
}
while ((d = __readdir64 (dirstream)) != NULL)
if ((d->d_fileno == myino || *dostat)
&& strcmp (d->d_name, "stdin")
&& strcmp (d->d_name, "stdout")
&& strcmp (d->d_name, "stderr"))
{
size_t dlen = _D_ALLOC_NAMLEN (d);
if (devlen + dlen > namelen)
{
free (getttyname_name);
namelen = 2 * (devlen + dlen); /* Big enough. */
getttyname_name = malloc (namelen);
if (! getttyname_name)
{
*dostat = -1;
/* Perhaps it helps to free the directory stream buffer. */
(void) __closedir (dirstream);
return NULL;
}
*((char *) __mempcpy (getttyname_name, dev, devlen - 1)) = '/';
}
memcpy (&getttyname_name[devlen], d->d_name, dlen);
if (__xstat64 (_STAT_VER, getttyname_name, &st) == 0
#ifdef _STATBUF_ST_RDEV
&& S_ISCHR (st.st_mode) && st.st_rdev == mydev
#else
&& d->d_fileno == myino && st.st_dev == mydev
#endif
)
{
(void) __closedir (dirstream);
#if 0
__ttyname = getttyname_name;
#endif
__set_errno (save);
return getttyname_name;
}
}
(void) __closedir (dirstream);
__set_errno (save);
return NULL;
}
static char *
getttyname (int fd, dev_t mydev, ino_t myino, int save, int *dostat)
{
static const char dev[] = "/dev";
static size_t namelen;
struct stat st;
DIR *dirstream;
struct dirent *d;
dirstream = __opendir (dev);
if (dirstream == NULL)
{
*dostat = -1;
return NULL;
}
while ((d = __readdir (dirstream)) != NULL)
if (((ino_t) d->d_fileno == myino || *dostat)
&& strcmp (d->d_name, "stdin")
&& strcmp (d->d_name, "stdout")
&& strcmp (d->d_name, "stderr"))
{
size_t dlen = _D_ALLOC_NAMLEN (d);
if (sizeof (dev) + dlen > namelen)
{
free (getttyname_name);
namelen = 2 * (sizeof (dev) + dlen); /* Big enough. */
getttyname_name = malloc (namelen);
if (! getttyname_name)
{
*dostat = -1;
/* Perhaps it helps to free the directory stream buffer. */
(void) __closedir (dirstream);
return NULL;
}
*((char *) __mempcpy (getttyname_name, dev, sizeof (dev) - 1))
= '/';
}
(void) __mempcpy (&getttyname_name[sizeof (dev)], d->d_name, dlen);
if (stat (getttyname_name, &st) == 0
#ifdef _STATBUF_ST_RDEV
&& S_ISCHR (st.st_mode) && st.st_rdev == mydev
#else
&& (ino_t) d->d_fileno == myino && st.st_dev == mydev
#endif
)
{
(void) __closedir (dirstream);
__ttyname = getttyname_name;
__set_errno (save);
return getttyname_name;
}
}
(void) __closedir (dirstream);
__set_errno (save);
return NULL;
}
static int
internal_function attribute_compat_text_section
getttyname_r (char *buf, size_t buflen, dev_t mydev, ino64_t myino,
int save, int *dostat)
{
struct stat64 st;
DIR *dirstream;
struct dirent64 *d;
size_t devlen = strlen (buf);
dirstream = __opendir (buf);
if (dirstream == NULL)
{
*dostat = -1;
return errno;
}
while ((d = __readdir64 (dirstream)) != NULL)
if ((d->d_fileno == myino || *dostat)
&& strcmp (d->d_name, "stdin")
&& strcmp (d->d_name, "stdout")
&& strcmp (d->d_name, "stderr"))
{
char *cp;
size_t needed = _D_EXACT_NAMLEN (d) + 1;
if (needed > buflen)
{
*dostat = -1;
(void) __closedir (dirstream);
__set_errno (ERANGE);
return ERANGE;
}
cp = __stpncpy (buf + devlen, d->d_name, needed);
cp[0] = '\0';
if (__xstat64 (_STAT_VER, buf, &st) == 0
#ifdef _STATBUF_ST_RDEV
&& S_ISCHR (st.st_mode) && st.st_rdev == mydev
#else
&& d->d_fileno == myino && st.st_dev == mydev
#endif
)
{
(void) __closedir (dirstream);
__set_errno (save);
return 0;
}
}
(void) __closedir (dirstream);
__set_errno (save);
/* It is not clear what to return in this case. `isatty' says FD
refers to a TTY but no entry in /dev has this inode. */
return ENOTTY;
}
internal_function
getttyname (const char *dev, dev_t mydev, ino64_t myino, int save)
{
static size_t namelen;
struct stat64 st;
DIR *dirstream;
struct dirent *d;
size_t devlen = strlen (dev) + 1;
dirstream = __opendir (dev);
if (dirstream == NULL)
{
return NULL;
}
while ((d = __readdir (dirstream)) != NULL)
if (d->d_fileno == myino)
{
size_t dlen = _D_ALLOC_NAMLEN (d);
if (devlen + dlen > namelen)
{
free (getttyname_name);
namelen = 2 * (devlen + dlen); /* Big enough. */
getttyname_name = malloc (namelen);
if (! getttyname_name)
{
/* Perhaps it helps to free the directory stream buffer. */
(void) __closedir (dirstream);
return NULL;
}
}
/* Always recopy dev since it may be master or slave. */
*((char *) __mempcpy (getttyname_name, dev, devlen - 1)) = '/';
memcpy (&getttyname_name[devlen], d->d_name, dlen);
if (__xstat64 (_STAT_VER, getttyname_name, &st) == 0
#ifdef _STATBUF_ST_RDEV
&& S_ISCHR (st.st_mode) && st.st_rdev == mydev
#else
&& d->d_fileno == myino && st.st_dev == mydev
#endif
)
{
(void) __closedir (dirstream);
#if 0
__ttyname = getttyname_name;
#endif
__set_errno (save);
return getttyname_name;
}
}
(void) __closedir (dirstream);
__set_errno (save);
return NULL;
}
DIR *
opendir(const char *dirname)
{
int fd;
fd = open(dirname, O_RDONLY|O_DIRECTORY);
if (fd == -1)
return (NULL);
return (__opendir(fd));
}
/* On some architectures it is possible to distinguish between configured
and active cpus. */
int
__get_nprocs_conf ()
{
/* XXX Here will come a test for the new system call. */
/* Try to use the sysfs filesystem. It has actual information about
online processors. */
DIR *dir = __opendir ("/sys/devices/system/cpu");
if (dir != NULL)
{
int count = 0;
struct dirent64 *d;
while ((d = __readdir64 (dir)) != NULL)
/* NB: the sysfs has d_type support. */
if (d->d_type == DT_DIR && strncmp (d->d_name, "cpu", 3) == 0)
{
char *endp;
unsigned long int nr = strtoul (d->d_name + 3, &endp, 10);
if (nr != ULONG_MAX && endp != d->d_name + 3 && *endp == '\0')
++count;
}
__closedir (dir);
return count;
}
int result = 1;
#ifdef GET_NPROCS_CONF_PARSER
/* If we haven't found an appropriate entry return 1. */
FILE *fp = fopen ("/proc/cpuinfo", "rce");
if (fp != NULL)
{
char buffer[8192];
/* No threads use this stream. */
__fsetlocking (fp, FSETLOCKING_BYCALLER);
GET_NPROCS_CONF_PARSER (fp, buffer, result);
fclose (fp);
}
#else
result = __get_nprocs ();
#endif
return result;
}
char *
__getcwd (char *buf, size_t size)
{
/* Lengths of big file name components and entire file names, and a
deep level of file name nesting. These numbers are not upper
bounds; they are merely large values suitable for initial
allocations, designed to be large enough for most real-world
uses. */
enum
{
BIG_FILE_NAME_COMPONENT_LENGTH = 255,
BIG_FILE_NAME_LENGTH = MIN (4095, PATH_MAX - 1),
DEEP_NESTING = 100
};
#if HAVE_OPENAT_SUPPORT
int fd = AT_FDCWD;
bool fd_needs_closing = false;
#else
char dots[DEEP_NESTING * sizeof ".." + BIG_FILE_NAME_COMPONENT_LENGTH + 1];
char *dotlist = dots;
size_t dotsize = sizeof dots;
size_t dotlen = 0;
#endif
DIR *dirstream = NULL;
dev_t rootdev, thisdev;
ino_t rootino, thisino;
char *dir;
register char *dirp;
struct stat st;
size_t allocated = size;
size_t used;
#if HAVE_PARTLY_WORKING_GETCWD
/* The system getcwd works, except it sometimes fails when it
shouldn't, setting errno to ERANGE, ENAMETOOLONG, or ENOENT. If
AT_FDCWD is not defined, the algorithm below is O(N**2) and this
is much slower than the system getcwd (at least on GNU/Linux).
So trust the system getcwd's results unless they look
suspicious.
Use the system getcwd even if we have openat support, since the
system getcwd works even when a parent is unreadable, while the
openat-based approach does not. */
# undef getcwd
dir = getcwd (buf, size);
if (dir || (errno != ERANGE && errno != ENAMETOOLONG && errno != ENOENT))
return dir;
#endif
if (size == 0)
{
if (buf != NULL)
{
__set_errno (EINVAL);
return NULL;
}
allocated = BIG_FILE_NAME_LENGTH + 1;
}
if (buf == NULL)
{
dir = malloc (allocated);
if (dir == NULL)
return NULL;
}
else
dir = buf;
dirp = dir + allocated;
*--dirp = '\0';
if (__lstat (".", &st) < 0)
goto lose;
thisdev = st.st_dev;
thisino = st.st_ino;
if (__lstat ("/", &st) < 0)
goto lose;
rootdev = st.st_dev;
rootino = st.st_ino;
while (!(thisdev == rootdev && thisino == rootino))
{
struct dirent *d;
dev_t dotdev;
ino_t dotino;
bool mount_point;
int parent_status;
size_t dirroom;
size_t namlen;
bool use_d_ino = true;
/* Look at the parent directory. */
#if HAVE_OPENAT_SUPPORT
fd = openat (fd, "..", O_RDONLY);
if (fd < 0)
goto lose;
fd_needs_closing = true;
parent_status = fstat (fd, &st);
#else
dotlist[dotlen++] = '.';
dotlist[dotlen++] = '.';
dotlist[dotlen] = '\0';
parent_status = __lstat (dotlist, &st);
#endif
if (parent_status != 0)
goto lose;
if (dirstream && __closedir (dirstream) != 0)
{
dirstream = NULL;
goto lose;
}
/* Figure out if this directory is a mount point. */
dotdev = st.st_dev;
dotino = st.st_ino;
mount_point = dotdev != thisdev;
/* Search for the last directory. */
#if HAVE_OPENAT_SUPPORT
dirstream = fdopendir (fd);
if (dirstream == NULL)
goto lose;
/* Reset fd. It may have been closed by fdopendir. */
fd = dirfd (dirstream);
fd_needs_closing = false;
#else
dirstream = __opendir (dotlist);
if (dirstream == NULL)
goto lose;
dotlist[dotlen++] = '/';
#endif
for (;;)
{
/* Clear errno to distinguish EOF from error if readdir returns
NULL. */
__set_errno (0);
d = __readdir (dirstream);
/* When we've iterated through all directory entries without finding
one with a matching d_ino, rewind the stream and consider each
name again, but this time, using lstat. This is necessary in a
chroot on at least one system (glibc-2.3.6 + linux 2.6.12), where
.., ../.., ../../.., etc. all had the same device number, yet the
d_ino values for entries in / did not match those obtained
via lstat. */
if (d == NULL && errno == 0 && use_d_ino)
{
use_d_ino = false;
rewinddir (dirstream);
d = __readdir (dirstream);
}
if (d == NULL)
{
if (errno == 0)
/* EOF on dirstream, which can mean e.g., that the current
directory has been removed. */
__set_errno (ENOENT);
goto lose;
}
if (d->d_name[0] == '.' &&
(d->d_name[1] == '\0' ||
(d->d_name[1] == '.' && d->d_name[2] == '\0')))
continue;
if (use_d_ino)
{
bool match = (MATCHING_INO (d, thisino) || mount_point);
if (! match)
continue;
}
{
int entry_status;
#if HAVE_OPENAT_SUPPORT
entry_status = fstatat (fd, d->d_name, &st, AT_SYMLINK_NOFOLLOW);
#else
/* Compute size needed for this file name, or for the file
name ".." in the same directory, whichever is larger.
Room for ".." might be needed the next time through
the outer loop. */
size_t name_alloc = _D_ALLOC_NAMLEN (d);
size_t filesize = dotlen + MAX (sizeof "..", name_alloc);
if (filesize < dotlen)
goto memory_exhausted;
if (dotsize < filesize)
{
/* My, what a deep directory tree you have, Grandma. */
size_t newsize = MAX (filesize, dotsize * 2);
size_t i;
if (newsize < dotsize)
goto memory_exhausted;
if (dotlist != dots)
free (dotlist);
dotlist = malloc (newsize);
if (dotlist == NULL)
goto lose;
dotsize = newsize;
i = 0;
do
{
dotlist[i++] = '.';
dotlist[i++] = '.';
dotlist[i++] = '/';
}
while (i < dotlen);
}
memcpy (dotlist + dotlen, d->d_name, _D_ALLOC_NAMLEN (d));
entry_status = __lstat (dotlist, &st);
#endif
/* We don't fail here if we cannot stat() a directory entry.
This can happen when (network) file systems fail. If this
entry is in fact the one we are looking for we will find
out soon as we reach the end of the directory without
having found anything. */
if (entry_status == 0 && S_ISDIR (st.st_mode)
&& st.st_dev == thisdev && st.st_ino == thisino)
break;
}
}
dirroom = dirp - dir;
namlen = _D_EXACT_NAMLEN (d);
if (dirroom <= namlen)
{
if (size != 0)
{
__set_errno (ERANGE);
goto lose;
}
else
{
char *tmp;
size_t oldsize = allocated;
allocated += MAX (allocated, namlen);
if (allocated < oldsize
|| ! (tmp = realloc (dir, allocated)))
goto memory_exhausted;
/* Move current contents up to the end of the buffer.
This is guaranteed to be non-overlapping. */
dirp = memcpy (tmp + allocated - (oldsize - dirroom),
tmp + dirroom,
oldsize - dirroom);
dir = tmp;
}
}
dirp -= namlen;
memcpy (dirp, d->d_name, namlen);
*--dirp = '/';
thisdev = dotdev;
thisino = dotino;
}
if (dirstream && __closedir (dirstream) != 0)
{
dirstream = NULL;
goto lose;
}
if (dirp == &dir[allocated - 1])
*--dirp = '/';
#if ! HAVE_OPENAT_SUPPORT
if (dotlist != dots)
free (dotlist);
#endif
used = dir + allocated - dirp;
memmove (dir, dirp, used);
if (size == 0)
/* Ensure that the buffer is only as large as necessary. */
buf = realloc (dir, used);
if (buf == NULL)
/* Either buf was NULL all along, or `realloc' failed but
we still have the original string. */
buf = dir;
return buf;
memory_exhausted:
__set_errno (ENOMEM);
lose:
{
int save = errno;
if (dirstream)
__closedir (dirstream);
#if HAVE_OPENAT_SUPPORT
if (fd_needs_closing)
close (fd);
#else
if (dotlist != dots)
free (dotlist);
#endif
if (buf == NULL)
free (dir);
__set_errno (save);
}
return NULL;
}
open_dir_stream (int *dfdp, struct ftw_data *data, struct dir_data *dirp)
{
int result = 0;
if (data->dirstreams[data->actdir] != NULL)
{
/* Oh, oh. We must close this stream. Get all remaining
entries and store them as a list in the `content' member of
the `struct dir_data' variable. */
size_t bufsize = 1024;
char *buf = malloc (bufsize);
if (buf == NULL)
result = -1;
else
{
DIR *st = data->dirstreams[data->actdir]->stream;
struct dirent64 *d;
size_t actsize = 0;
while ((d = __readdir64 (st)) != NULL)
{
size_t this_len = NAMLEN (d);
if (actsize + this_len + 2 >= bufsize)
{
char *newp;
bufsize += MAX (1024, 2 * this_len);
newp = (char *) realloc (buf, bufsize);
if (newp == NULL)
{
/* No more memory. */
int save_err = errno;
free (buf);
__set_errno (save_err);
return -1;
}
buf = newp;
}
*((char *) __mempcpy (buf + actsize, d->d_name, this_len))
= '\0';
actsize += this_len + 1;
}
/* Terminate the list with an additional NUL byte. */
buf[actsize++] = '\0';
/* Shrink the buffer to what we actually need. */
data->dirstreams[data->actdir]->content = realloc (buf, actsize);
if (data->dirstreams[data->actdir]->content == NULL)
{
int save_err = errno;
free (buf);
__set_errno (save_err);
result = -1;
}
else
{
__closedir (st);
data->dirstreams[data->actdir]->stream = NULL;
data->dirstreams[data->actdir]->streamfd = -1;
data->dirstreams[data->actdir] = NULL;
}
}
}
/* Open the new stream. */
if (result == 0)
{
assert (data->dirstreams[data->actdir] == NULL);
if (dfdp != NULL && *dfdp != -1)
{
int fd = __openat64_nocancel (*dfdp, data->dirbuf + data->ftw.base,
O_RDONLY | O_DIRECTORY | O_NDELAY);
dirp->stream = NULL;
if (fd != -1 && (dirp->stream = __fdopendir (fd)) == NULL)
__close_nocancel_nostatus (fd);
}
else
{
const char *name;
if (data->flags & FTW_CHDIR)
{
name = data->dirbuf + data->ftw.base;
if (name[0] == '\0')
name = ".";
}
else
name = data->dirbuf;
dirp->stream = __opendir (name);
}
if (dirp->stream == NULL)
result = -1;
else
{
dirp->streamfd = __dirfd (dirp->stream);
dirp->content = NULL;
data->dirstreams[data->actdir] = dirp;
if (++data->actdir == data->maxdir)
data->actdir = 0;
}
}
return result;
}
char *
__getcwd (char *buf, size_t size)
{
/* Lengths of big file name components and entire file names, and a
deep level of file name nesting. These numbers are not upper
bounds; they are merely large values suitable for initial
allocations, designed to be large enough for most real-world
uses. */
enum
{
BIG_FILE_NAME_COMPONENT_LENGTH = 255,
BIG_FILE_NAME_LENGTH = MIN (4095, PATH_MAX - 1),
DEEP_NESTING = 100
};
#ifdef AT_FDCWD
int fd = AT_FDCWD;
bool fd_needs_closing = false;
#else
char dots[DEEP_NESTING * sizeof ".." + BIG_FILE_NAME_COMPONENT_LENGTH + 1];
char *dotlist = dots;
size_t dotsize = sizeof dots;
size_t dotlen = 0;
#endif
DIR *dirstream = NULL;
dev_t rootdev, thisdev;
ino_t rootino, thisino;
char *path;
register char *pathp;
struct stat st;
size_t allocated = size;
size_t used;
#if HAVE_PARTLY_WORKING_GETCWD && !defined AT_FDCWD
/* The system getcwd works, except it sometimes fails when it
shouldn't, setting errno to ERANGE, ENAMETOOLONG, or ENOENT. If
AT_FDCWD is not defined, the algorithm below is O(N**2) and this
is much slower than the system getcwd (at least on GNU/Linux).
So trust the system getcwd's results unless they look
suspicious. */
# undef getcwd
path = getcwd (buf, size);
if (path || (errno != ERANGE && !is_ENAMETOOLONG (errno) && errno != ENOENT))
return path;
#endif
if (size == 0)
{
if (buf != NULL)
{
__set_errno (EINVAL);
return NULL;
}
allocated = BIG_FILE_NAME_LENGTH + 1;
}
if (buf == NULL)
{
path = malloc (allocated);
if (path == NULL)
return NULL;
}
else
path = buf;
pathp = path + allocated;
*--pathp = '\0';
if (__lstat (".", &st) < 0)
goto lose;
thisdev = st.st_dev;
thisino = st.st_ino;
if (__lstat ("/", &st) < 0)
goto lose;
rootdev = st.st_dev;
rootino = st.st_ino;
while (!(thisdev == rootdev && thisino == rootino))
{
struct dirent *d;
dev_t dotdev;
ino_t dotino;
bool mount_point;
int parent_status;
/* Look at the parent directory. */
#ifdef AT_FDCWD
fd = openat (fd, "..", O_RDONLY);
if (fd < 0)
goto lose;
fd_needs_closing = true;
parent_status = fstat (fd, &st);
#else
dotlist[dotlen++] = '.';
dotlist[dotlen++] = '.';
dotlist[dotlen] = '\0';
parent_status = __lstat (dotlist, &st);
#endif
if (parent_status != 0)
goto lose;
if (dirstream && __closedir (dirstream) != 0)
{
dirstream = NULL;
goto lose;
}
/* Figure out if this directory is a mount point. */
dotdev = st.st_dev;
dotino = st.st_ino;
mount_point = dotdev != thisdev;
/* Search for the last directory. */
#ifdef AT_FDCWD
dirstream = fdopendir (fd);
if (dirstream == NULL)
goto lose;
fd_needs_closing = false;
#else
dirstream = __opendir (dotlist);
if (dirstream == NULL)
goto lose;
dotlist[dotlen++] = '/';
#endif
/* Clear errno to distinguish EOF from error if readdir returns
NULL. */
__set_errno (0);
while ((d = __readdir (dirstream)) != NULL)
{
if (d->d_name[0] == '.' &&
(d->d_name[1] == '\0' ||
(d->d_name[1] == '.' && d->d_name[2] == '\0')))
continue;
if (MATCHING_INO (d, thisino) || mount_point)
{
int entry_status;
#ifdef AT_FDCWD
entry_status = fstatat (fd, d->d_name, &st, AT_SYMLINK_NOFOLLOW);
#else
/* Compute size needed for this file name, or for the file
name ".." in the same directory, whichever is larger.
Room for ".." might be needed the next time through
the outer loop. */
size_t name_alloc = _D_ALLOC_NAMLEN (d);
size_t filesize = dotlen + MAX (sizeof "..", name_alloc);
if (filesize < dotlen)
goto memory_exhausted;
if (dotsize < filesize)
{
/* My, what a deep directory tree you have, Grandma. */
size_t newsize = MAX (filesize, dotsize * 2);
size_t i;
if (newsize < dotsize)
goto memory_exhausted;
if (dotlist != dots)
free (dotlist);
dotlist = malloc (newsize);
if (dotlist == NULL)
goto lose;
dotsize = newsize;
i = 0;
do
{
dotlist[i++] = '.';
dotlist[i++] = '.';
dotlist[i++] = '/';
}
while (i < dotlen);
}
strcpy (dotlist + dotlen, d->d_name);
entry_status = __lstat (dotlist, &st);
#endif
/* We don't fail here if we cannot stat() a directory entry.
This can happen when (network) file systems fail. If this
entry is in fact the one we are looking for we will find
out soon as we reach the end of the directory without
having found anything. */
if (entry_status == 0 && S_ISDIR (st.st_mode)
&& st.st_dev == thisdev && st.st_ino == thisino)
break;
}
}
if (d == NULL)
{
if (errno == 0)
/* EOF on dirstream, which means that the current directory
has been removed. */
__set_errno (ENOENT);
goto lose;
}
else
{
size_t pathroom = pathp - path;
size_t namlen = _D_EXACT_NAMLEN (d);
if (pathroom <= namlen)
{
if (size != 0)
{
__set_errno (ERANGE);
goto lose;
}
else
{
char *tmp;
size_t oldsize = allocated;
allocated += MAX (allocated, namlen);
if (allocated < oldsize
|| ! (tmp = realloc (path, allocated)))
goto memory_exhausted;
/* Move current contents up to the end of the buffer.
This is guaranteed to be non-overlapping. */
pathp = memcpy (tmp + allocated - (oldsize - pathroom),
tmp + pathroom,
oldsize - pathroom);
path = tmp;
}
}
pathp -= namlen;
memcpy (pathp, d->d_name, namlen);
*--pathp = '/';
}
thisdev = dotdev;
thisino = dotino;
}
if (dirstream && __closedir (dirstream) != 0)
{
dirstream = NULL;
goto lose;
}
if (pathp == &path[allocated - 1])
*--pathp = '/';
#ifndef AT_FDCWD
if (dotlist != dots)
free (dotlist);
#endif
used = path + allocated - pathp;
memmove (path, pathp, used);
if (buf == NULL && size == 0)
/* Ensure that the buffer is only as large as necessary. */
buf = realloc (path, used);
if (buf == NULL)
/* Either buf was NULL all along, or `realloc' failed but
we still have the original string. */
buf = path;
return buf;
memory_exhausted:
__set_errno (ENOMEM);
lose:
{
int save = errno;
if (dirstream)
__closedir (dirstream);
#ifdef AT_FDCWD
if (fd_needs_closing)
close (fd);
#else
if (dotlist != dots)
free (dotlist);
#endif
if (buf == NULL)
free (path);
__set_errno (save);
}
return NULL;
}
_WCRTLINK DIR_TYPE *opendir( const char *dirname )
{
return( __opendir( dirname ) );
}
