diff options
Diffstat (limited to 'sysdeps/mach/hurd/getcwd.c')
| -rw-r--r-- | sysdeps/mach/hurd/getcwd.c | 320 |
1 files changed, 0 insertions, 320 deletions
diff --git a/sysdeps/mach/hurd/getcwd.c b/sysdeps/mach/hurd/getcwd.c deleted file mode 100644 index 9b371b041a..0000000000 --- a/sysdeps/mach/hurd/getcwd.c +++ /dev/null @@ -1,320 +0,0 @@ -/* Copyright (C) 1991-2017 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 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 - Lesser General Public License for more details. - - 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 <sys/stat.h> -#include <hurd.h> -#include <hurd/port.h> -#include <dirent.h> -#include <unistd.h> -#include <stdlib.h> -#include <string.h> -#include <stdio.h> -#include <fcntl.h> - - -/* 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 * -_hurd_canonicalize_directory_name_internal (file_t thisdir, - char *buf, - size_t size) -{ - error_t err; - mach_port_t rootid, thisid, rootdevid, thisdevid; - ino64_t rootino, thisino; - char *file_name; - char *file_namep; - file_t parent; - char *dirbuf = NULL; - unsigned int dirbufsize = 0; - const size_t orig_size = size; - - inline void cleanup (void) - { - 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 (), - (vm_address_t) dirbuf, dirbufsize); - } - - - if (size <= 0) - { - if (buf != NULL) - { - errno = EINVAL; - return NULL; - } - - size = FILENAME_MAX * 4 + 1; /* Good starting guess. */ - } - - if (buf != NULL) - file_name = buf; - else - { - file_name = malloc (size); - if (file_name == NULL) - return NULL; - } - - file_namep = file_name + size; - *--file_namep = '\0'; - - /* Get a port to our root directory and get its identity. */ - - if (err = __USEPORT (CRDIR, __io_identity (port, - &rootid, &rootdevid, &rootino))) - return __hurd_fail (err), NULL; - __mach_port_deallocate (__mach_task_self (), rootdevid); - - /* Stat the port to the directory of interest. */ - - if (err = __io_identity (thisdir, &thisid, &thisdevid, &thisino)) - { - __mach_port_deallocate (__mach_task_self (), rootid); - return __hurd_fail (err), NULL; - } - - parent = thisdir; - while (thisid != rootid) - { - /* PARENT is a port to the directory we are currently on; - THISID, THISDEV, and THISINO are its identity. - Look in its parent (..) for a file with the same file number. */ - - struct dirent64 *d; - mach_port_t dotid, dotdevid; - ino64_t dotino; - int mount_point; - file_t newp; - char *dirdata; - size_t dirdatasize; - int direntry, nentries; - - - /* Look at the parent directory. */ - newp = __file_name_lookup_under (parent, "..", O_READ, 0); - if (newp == MACH_PORT_NULL) - goto lose; - if (parent != thisdir) - __mach_port_deallocate (__mach_task_self (), parent); - parent = newp; - - /* Get this directory's identity and figure out if it's a mount - point. */ - if (err = __io_identity (parent, &dotid, &dotdevid, &dotino)) - goto errlose; - 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; - dirdata = dirbuf; - dirdatasize = dirbufsize; - while (!(err = __dir_readdir (parent, &dirdata, &dirdatasize, - direntry, -1, 0, &nentries)) && - nentries != 0) - { - /* We have a block of directory entries. */ - - unsigned int offset; - - direntry += nentries; - - if (dirdata != dirbuf) - { - /* The data was passed out of line, so our old buffer is no - longer useful. Deallocate the old buffer and reset our - information for the new buffer. */ - __vm_deallocate (__mach_task_self (), - (vm_address_t) dirbuf, dirbufsize); - dirbuf = dirdata; - dirbufsize = round_page (dirdatasize); - } - - /* Iterate over the returned directory entries, looking for one - whose file number is THISINO. */ - - offset = 0; - while (offset < dirdatasize) - { - d = (struct dirent64 *) &dirdata[offset]; - offset += d->d_reclen; - - /* Ignore `.' and `..'. */ - if (d->d_name[0] == '.' && - (d->d_namlen == 1 || - (d->d_namlen == 2 && d->d_name[1] == '.'))) - continue; - - if (mount_point || d->d_ino == thisino) - { - 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_identity (try, &id, &devid, &fileno); - __mach_port_deallocate (__mach_task_self (), try); - if (err) - goto inner_errlose; - __mach_port_deallocate (__mach_task_self (), id); - __mach_port_deallocate (__mach_task_self (), devid); - if (id == thisid) - goto found; - } - } - } - - if (err) - { - 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 inner_errlose; - } - else - found: - { - /* Prepend the directory name just discovered. */ - - if (file_namep - file_name < d->d_namlen + 1) - { - if (orig_size > 0) - { - errno = ERANGE; - return NULL; - } - else - { - size *= 2; - buf = realloc (file_name, size); - if (buf == NULL) - { - free (file_name); - return NULL; - } - 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; - (void) memcpy (file_namep, d->d_name, d->d_namlen); - *--file_namep = '/'; - } - - /* The next iteration will find the name of the directory we - just searched through. */ - __mach_port_deallocate (__mach_task_self (), thisid); - __mach_port_deallocate (__mach_task_self (), thisdevid); - thisid = dotid; - thisdevid = dotdevid; - thisino = dotino; - } - - if (file_namep == &file_name[size - 1]) - /* We found nothing and got all the way to the root. - 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; - - errlose: - /* Set errno. */ - (void) __hurd_fail (err); - lose: - cleanup (); - return NULL; -} - -char * -__canonicalize_directory_name_internal (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; -} - -/* 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) |