-/* Copyright (C) 1991, 92, 93, 94, 95, 96 Free Software Foundation, Inc.
-This file is part of the GNU C Library.
+/* Copyright (C) 1991-2012 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
-The GNU C Library is free software; you can redistribute it and/or
-modify it under the terms of the GNU Library General Public License as
-published by the Free Software Foundation; either version 2 of the
-License, or (at your option) any later version.
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
-The GNU C Library is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-Library General Public License for more details.
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
-You should have received a copy of the GNU Library General Public
-License along with the GNU C Library; see the file COPYING.LIB. If
-not, write to the Free Software Foundation, Inc., 675 Mass Ave,
-Cambridge, MA 02139, USA. */
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <sys/types.h>
#include <fcntl.h>
-/* Get the pathname of the current working directory, and put it in SIZE
- bytes of BUF. Returns NULL if the directory couldn't be determined or
- SIZE was too small. If successful, returns BUF. In GNU, if BUF is
- NULL, an array is allocated with `malloc'; the array is SIZE bytes long,
- unless SIZE <= 0, in which case it is as big as necessary. */
+/* Get the canonical absolute name of the given directory port, and put it
+ in SIZE bytes of BUF. Returns NULL if the directory couldn't be
+ determined or SIZE was too small. If successful, returns BUF. In GNU,
+ if BUF is NULL, an array is allocated with `malloc'; the array is SIZE
+ bytes long, unless SIZE <= 0, in which case it is as big as necessary.
+ If our root directory cannot be reached, the result will not begin with
+ a slash to indicate that it is relative to some unknown root directory. */
char *
-__getcwd (char *buf, size_t size)
+_hurd_canonicalize_directory_name_internal (file_t thisdir,
+ char *buf,
+ size_t size)
{
error_t err;
- dev_t rootdev, thisdev;
- ino_t rootino, thisino;
+ mach_port_t rootid, thisid, rootdevid, thisdevid;
+ ino64_t rootino, thisino;
char *file_name;
register char *file_namep;
- struct stat st;
file_t parent;
char *dirbuf = NULL;
unsigned int dirbufsize = 0;
+ const size_t orig_size = size;
inline void cleanup (void)
{
- __mach_port_deallocate (__mach_task_self (), parent);
+ if (parent != thisdir)
+ __mach_port_deallocate (__mach_task_self (), parent);
+
+ __mach_port_deallocate (__mach_task_self (), thisid);
+ __mach_port_deallocate (__mach_task_self (), thisdevid);
+ __mach_port_deallocate (__mach_task_self (), rootid);
if (dirbuf != NULL)
__vm_deallocate (__mach_task_self (),
}
- if (size == 0)
+ if (size <= 0)
{
if (buf != NULL)
{
file_namep = file_name + size;
*--file_namep = '\0';
- /* Get a port to our root directory and stat it. */
+ /* Get a port to our root directory and get its identity. */
- if (err = __USEPORT (CRDIR, __io_stat (port, &st)))
+ if (err = __USEPORT (CRDIR, __io_identity (port,
+ &rootid, &rootdevid, &rootino)))
return __hurd_fail (err), NULL;
- rootdev = st.st_dev;
- rootino = st.st_ino;
+ __mach_port_deallocate (__mach_task_self (), rootdevid);
- /* Get a port to our current working directory and stat it. */
+ /* Stat the port to the directory of interest. */
- if (err = __USEPORT (CWDIR, __mach_port_mod_refs (__mach_task_self (),
- (parent = port),
- MACH_PORT_RIGHT_SEND,
- 1)))
- return __hurd_fail (err), NULL;
- if (err = __io_stat (parent, &st))
+ if (err = __io_identity (thisdir, &thisid, &thisdevid, &thisino))
{
- cleanup ();
+ __mach_port_deallocate (__mach_task_self (), rootid);
return __hurd_fail (err), NULL;
}
- thisdev = st.st_dev;
- thisino = st.st_ino;
-
- while (!(thisdev == rootdev && thisino == rootino))
+ parent = thisdir;
+ while (thisid != rootid)
{
/* PARENT is a port to the directory we are currently on;
- THISDEV and THISINO are its device and node numbers.
- Look in its parent (..) for a file with the same numbers. */
+ THISID, THISDEV, and THISINO are its identity.
+ Look in its parent (..) for a file with the same file number. */
- struct dirent *d;
- dev_t dotdev;
- ino_t dotino;
+ struct dirent64 *d;
+ mach_port_t dotid, dotdevid;
+ ino64_t dotino;
int mount_point;
file_t newp;
char *dirdata;
- unsigned int dirdatasize;
+ size_t dirdatasize;
int direntry, nentries;
newp = __file_name_lookup_under (parent, "..", O_READ, 0);
if (newp == MACH_PORT_NULL)
goto lose;
- __mach_port_deallocate (__mach_task_self (), parent);
+ if (parent != thisdir)
+ __mach_port_deallocate (__mach_task_self (), parent);
parent = newp;
- /* Figure out if this directory is a mount point. */
- if (err = __io_stat (parent, &st))
+ /* Get this directory's identity and figure out if it's a mount
+ point. */
+ if (err = __io_identity (parent, &dotid, &dotdevid, &dotino))
goto errlose;
- dotdev = st.st_dev;
- dotino = st.st_ino;
- mount_point = dotdev != thisdev;
+ mount_point = dotdevid != thisdevid;
+
+ if (thisid == dotid)
+ {
+ /* `..' == `.' but it is not our root directory. */
+ __mach_port_deallocate (__mach_task_self (), dotid);
+ __mach_port_deallocate (__mach_task_self (), dotdevid);
+ break;
+ }
/* Search for the last directory. */
direntry = 0;
offset = 0;
while (offset < dirdatasize)
{
- d = (struct dirent *) &dirdata[offset];
+ d = (struct dirent64 *) &dirdata[offset];
offset += d->d_reclen;
/* Ignore `.' and `..'. */
{
file_t try = __file_name_lookup_under (parent, d->d_name,
O_NOLINK, 0);
+ file_t id, devid;
+ ino64_t fileno;
if (try == MACH_PORT_NULL)
goto lose;
- err = __io_stat (try, &st);
+ err = __io_identity (try, &id, &devid, &fileno);
__mach_port_deallocate (__mach_task_self (), try);
if (err)
- goto errlose;
- if (st.st_dev == thisdev && st.st_ino == thisino)
+ goto inner_errlose;
+ __mach_port_deallocate (__mach_task_self (), id);
+ __mach_port_deallocate (__mach_task_self (), devid);
+ if (id == thisid)
goto found;
}
}
}
if (err)
- goto errlose;
+ {
+ inner_errlose: /* Goto ERRLOSE: after cleaning up. */
+ __mach_port_deallocate (__mach_task_self (), dotid);
+ __mach_port_deallocate (__mach_task_self (), dotdevid);
+ goto errlose;
+ }
else if (nentries == 0)
{
/* We got to the end of the directory without finding anything!
We are in a directory that has been unlinked, or something is
broken. */
err = ENOENT;
- goto errlose;
+ goto inner_errlose;
}
else
found:
if (file_namep - file_name < d->d_namlen + 1)
{
- if (buf != NULL)
+ if (orig_size > 0)
{
errno = ERANGE;
return NULL;
free (file_name);
return NULL;
}
- file_namep = &buf[file_namep - file_name];
+ file_namep = &buf[file_namep - file_name + size / 2];
file_name = buf;
+ /* Move current contents up to the end of the buffer.
+ This is guaranteed to be non-overlapping. */
+ memcpy (file_namep, file_namep - size / 2,
+ file_name + size - file_namep);
}
}
file_namep -= d->d_namlen;
/* The next iteration will find the name of the directory we
just searched through. */
- thisdev = dotdev;
+ __mach_port_deallocate (__mach_task_self (), thisid);
+ __mach_port_deallocate (__mach_task_self (), thisdevid);
+ thisid = dotid;
+ thisdevid = dotdevid;
thisino = dotino;
}
So the root is our current directory. */
*--file_namep = '/';
+ if (thisid != rootid)
+ /* We did not get to our root directory. The returned name should
+ not begin with a slash. */
+ ++file_namep;
+
memmove (file_name, file_namep, file_name + size - file_namep);
cleanup ();
return file_name;
cleanup ();
return NULL;
}
+
+char *
+__canonicalize_directory_name_internal (thisdir, buf, size)
+ const char *thisdir;
+ char *buf;
+ size_t size;
+{
+ char *result;
+ file_t port = __file_name_lookup (thisdir, 0, 0);
+ if (port == MACH_PORT_NULL)
+ return NULL;
+ result = _hurd_canonicalize_directory_name_internal (port, buf, size);
+ __mach_port_deallocate (__mach_task_self (), port);
+ return result;
+}
+\f
+/* Get the pathname of the current working directory, and put it in SIZE
+ bytes of BUF. Returns NULL if the directory couldn't be determined or
+ SIZE was too small. If successful, returns BUF. In GNU, if BUF is
+ NULL, an array is allocated with `malloc'; the array is SIZE bytes long,
+ unless SIZE <= 0, in which case it is as big as necessary. */
+char *
+__getcwd (char *buf, size_t size)
+{
+ char *cwd =
+ __USEPORT (CWDIR,
+ _hurd_canonicalize_directory_name_internal (port,
+ buf, size));
+ if (cwd && cwd[0] != '/')
+ {
+ /* `cwd' is an unknown root directory. */
+ if (buf == NULL)
+ free (cwd);
+ return __hurd_fail (EGRATUITOUS), NULL;
+ }
+ return cwd;
+}
weak_alias (__getcwd, getcwd)
projects / thirdparty / glibc.git / blobdiff