137 lines
3.7 KiB
C
137 lines
3.7 KiB
C
/*
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* Copyright (c) 1992 - 1993, Julianne Frances Haugh
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* Copyright (c) 1996 - 2000, Marek Michałkiewicz
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* Copyright (c) 2003 - 2005, Tomasz Kłoczko
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the copyright holders or contributors may not be used to
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* endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <config.h>
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#ident "$Id$"
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#include <sys/types.h>
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#include <sys/stat.h>
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#include "prototypes.h"
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#include "defines.h"
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#include <fcntl.h>
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#include <stdio.h>
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/*
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* chown_tree - change ownership of files in a directory tree
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*
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* chown_dir() walks a directory tree and changes the ownership
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* of all files owned by the provided user ID.
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*/
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int
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chown_tree (const char *root, uid_t old_uid, uid_t new_uid, gid_t old_gid,
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gid_t new_gid)
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{
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char new_name[1024];
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int rc = 0;
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struct DIRECT *ent;
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struct stat sb;
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DIR *dir;
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/*
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* Make certain the directory exists. This routine is called
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* directory by the invoker, or recursively.
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*/
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if (access (root, F_OK) != 0)
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return -1;
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/*
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* Open the directory and read each entry. Every entry is tested
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* to see if it is a directory, and if so this routine is called
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* recursively. If not, it is checked to see if it is owned by
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* old user ID.
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*/
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if (!(dir = opendir (root)))
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return -1;
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while ((ent = readdir (dir))) {
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/*
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* Skip the "." and ".." entries
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*/
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if (strcmp (ent->d_name, ".") == 0 ||
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strcmp (ent->d_name, "..") == 0)
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continue;
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/*
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* Make the filename for both the source and the
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* destination files.
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*/
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if (strlen (root) + strlen (ent->d_name) + 2 > sizeof new_name)
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break;
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snprintf (new_name, sizeof new_name, "%s/%s", root,
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ent->d_name);
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/* Don't follow symbolic links! */
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if (LSTAT (new_name, &sb) == -1)
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continue;
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if (S_ISDIR (sb.st_mode) && !S_ISLNK (sb.st_mode)) {
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/*
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* Do the entire subdirectory.
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*/
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rc = chown_tree (new_name, old_uid, new_uid,
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old_gid, new_gid);
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if (0 != rc) {
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break;
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}
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}
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#ifndef HAVE_LCHOWN
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/* don't use chown (follows symbolic links!) */
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if (S_ISLNK (sb.st_mode))
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continue;
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#endif
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if (sb.st_uid == old_uid)
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LCHOWN (new_name, new_uid,
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sb.st_gid == old_gid ? new_gid : sb.st_gid);
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}
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(void) closedir (dir);
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/*
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* Now do the root of the tree
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*/
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if (stat (root, &sb) == 0) {
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if (sb.st_uid == old_uid) {
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LCHOWN (root, new_uid,
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sb.st_gid == old_gid ? new_gid : sb.st_gid);
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}
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}
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return rc;
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}
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