+++ /dev/null
-/*
- * This Cplant(TM) source code is the property of Sandia National
- * Laboratories.
- *
- * This Cplant(TM) source code is copyrighted by Sandia National
- * Laboratories.
- *
- * The redistribution of this Cplant(TM) source code is subject to the
- * terms of the GNU Lesser General Public License
- * (see cit/LGPL or http://www.gnu.org/licenses/lgpl.html)
- *
- * Cplant(TM) Copyright 1998-2006 Sandia Corporation.
- * Under the terms of Contract DE-AC04-94AL85000, there is a non-exclusive
- * license for use of this work by or on behalf of the US Government.
- * Export of this program may require a license from the United States
- * Government.
- */
-
-/*
- * #############################################################################
- * #
- * # This Cplant(TM) source code is the property of Sandia National
- * # Laboratories.
- * #
- * # This Cplant(TM) source code is copyrighted by Sandia National
- * # Laboratories.
- * #
- * # The redistribution of this Cplant(TM) source code is subject to the
- * # terms of the GNU Lesser General Public License
- * # (see cit/LGPL or http://www.gnu.org/licenses/lgpl.html)
- * #
- * # Cplant(TM) Copyright 1998-2003 Sandia Corporation.
- * # Under the terms of Contract DE-AC04-94AL85000, there is a non-exclusive
- * # license for use of this work by or on behalf of the US Government.
- * # Export of this program may require a license from the United States
- * # Government.
- * #
- * #############################################################################
- */
-
-/*
- * This 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.
- *
- * This 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- * Questions or comments about this library should be sent to:
- *
- * Lee Ward
- * Sandia National Laboratories, New Mexico
- * P.O. Box 5800
- * Albuquerque, NM 87185-1110
- *
- * lee@sandia.gov
- */
-
-#include <stdlib.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <string.h>
-#include <limits.h>
-#include <errno.h>
-#include <assert.h>
-#include <sys/queue.h>
-
-#include "sysio.h"
-#include "inode.h"
-#include "mount.h"
-#include "file.h"
-#include "sysio-symbols.h"
-
-#ifdef DEFER_INIT_CWD
-const char *_sysio_init_cwd = NULL;
-#endif
-
-struct pnode *_sysio_cwd = NULL;
-
-/*
- * Change to directory specified by the given pnode.
- */
-int
-_sysio_p_chdir(struct pnode *pno)
-{
- int err;
-
- /*
- * Revalidate the pnode, and ensure it's an accessable directory
- */
- err = _sysio_p_validate(pno, NULL, NULL);
- if (err)
- return err;
- if (!(pno->p_base->pb_ino &&
- S_ISDIR(pno->p_base->pb_ino->i_stbuf.st_mode)))
- return -ENOTDIR;
- if ((err = _sysio_permitted(pno, X_OK)) != 0)
- return err;
-
- /*
- * Release old if set.
- */
- if (_sysio_cwd)
- P_RELE(_sysio_cwd);
-
- /*
- * Finally, change to the new.
- */
- _sysio_cwd = pno;
-
- return 0;
-}
-
-int
-SYSIO_INTERFACE_NAME(chdir)(const char *path)
-{
- int err;
- struct pnode *pno;
- SYSIO_INTERFACE_DISPLAY_BLOCK;
-
- SYSIO_INTERFACE_ENTER;
- err = _sysio_namei(_sysio_cwd, path, 0, NULL, &pno);
- if (err)
- SYSIO_INTERFACE_RETURN(-1, err);
-
- err = _sysio_p_chdir(pno);
- if (err)
- P_RELE(pno);
- SYSIO_INTERFACE_RETURN(err ? -1 : 0, err);
-}
-
-#ifdef REDSTORM
-#undef __chdir
-sysio_sym_weak_alias(SYSIO_INTERFACE_NAME(chdir),
- PREPEND(__, SYSIO_INTERFACE_NAME(chdir)))
-#endif
-
-/*
- * Return path tracked by the path ancestor chain.
- *
- * If the buf pointer is NULL, a buffer large enough to hold the path
- * is allocated from the heap.
- */
-
-static int
-_sysio_p_path(struct pnode *pno, char **buf, size_t size)
-{
- struct pnode *cur;
- size_t len;
- size_t n;
- char *cp;
-
- cur = pno;
-
- if (!size && buf && *buf)
- return -EINVAL;
-
- /*
- * Walk up the tree to the root, summing the component name
- * lengths and counting the vertices.
- */
- len = 0;
- n = 0;
- do {
- /*
- * If this is a covering path-node then the name should be
- * the *covered* nodes name, not this one unless we are at
- * the root of the name-space.
- */
- while (pno == pno->p_mount->mnt_root && pno != pno->p_parent )
- pno = pno->p_mount->mnt_covers;
-
- /*
- * Add length of this component to running sum and
- * account for this vertex.
- */
- assert((len >= pno->p_base->pb_name.len &&
- (size_t )~0 - pno->p_base->pb_name.len > len) ||
- (size_t )~0 - len > pno->p_base->pb_name.len);
- len += pno->p_base->pb_name.len;
- n++;
- assert(n);
- pno = pno->p_parent;
- } while (pno != pno->p_parent);
-
- if (!*buf)
- size = len + n + 1;
- if (len >= size || n >= size - len)
- return -ERANGE;
- if (!*buf) {
- /*
- * Allocate path buffer from the heap.
- */
- *buf = malloc(size * sizeof(char));
- if (!*buf)
- return -ENOMEM;
- }
-
- /*
- * Fill in the path buffer.
- */
- pno = cur;
- cp = *buf + len + n;
- *cp = '\0'; /* NUL terminate */
- do {
- /*
- * If this is a covering path-node then the name should be
- * the *covered* nodes name, not this one unless we are at
- * the root of the name-space.
- */
- while (pno == pno->p_mount->mnt_root && pno != pno->p_parent )
- pno = pno->p_mount->mnt_covers;
-
- /*
- * Add component and separator.
- */
- cp -= pno->p_base->pb_name.len;
- (void )memcpy(cp, pno->p_base->pb_name.name,
- pno->p_base->pb_name.len);
-
- *--cp = PATH_SEPARATOR;
- pno = pno->p_parent;
- } while (pno != pno->p_parent);
-
- return 0;
-}
-
-char *
-SYSIO_INTERFACE_NAME(getcwd)(char *buf, size_t size)
-{
- int err;
- SYSIO_INTERFACE_DISPLAY_BLOCK;
-
- SYSIO_INTERFACE_ENTER;
-#ifdef DEFER_INIT_CWD
- if (!_sysio_cwd) {
- struct pnode *pno;
-
- /*
- * Can no longer defer initialization of the current working
- * directory. Force namei to make it happen now.
- */
- if (_sysio_namei(NULL, ".", 0, NULL, &pno) != 0)
- abort();
- P_RELE(pno);
- }
-#endif
- err = _sysio_p_path(_sysio_cwd, &buf, buf ? size : 0);
- SYSIO_INTERFACE_RETURN(err ? NULL : buf, err);
-}
-
-#ifdef __GLIBC__
-#undef __getcwd
-sysio_sym_weak_alias(SYSIO_INTERFACE_NAME(getcwd),
- PREPEND(__, SYSIO_INTERFACE_NAME(getcwd)))
-#endif
-
-#if defined(PATH_MAX) && !(defined(REDSTORM))
-char *
-SYSIO_INTERFACE_NAME(getwd)(char *buf)
-{
-
- if (!buf) {
- errno = EFAULT;
- return NULL;
- }
-
- return SYSIO_INTERFACE_NAME(getcwd)(buf, PATH_MAX);
-}
-#endif
git://git.whamcloud.com / fs / lustre-release.git / blobdiff