1/*-
2 * Copyright (C) 1996
3 *	David L. Nugent.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#ifndef lint
28static const char rcsid[] =
29  "$FreeBSD: releng/10.3/usr.sbin/pw/rm_r.c 287084 2015-08-23 21:42:27Z bapt $";
30#endif /* not lint */
31
32#include <sys/stat.h>
33
34#include <dirent.h>
35#include <fcntl.h>
36#include <string.h>
37#include <unistd.h>
38
39#include "pwupd.h"
40
41void
42rm_r(int rootfd, const char *path, uid_t uid)
43{
44	int dirfd;
45	DIR *d;
46	struct dirent  *e;
47	struct stat     st;
48
49	if (*path == '/')
50		path++;
51
52	dirfd = openat(rootfd, path, O_DIRECTORY);
53
54	d = fdopendir(dirfd);
55	while ((e = readdir(d)) != NULL) {
56		if (strcmp(e->d_name, ".") == 0 || strcmp(e->d_name, "..") == 0)
57			continue;
58
59		if (fstatat(dirfd, e->d_name, &st, AT_SYMLINK_NOFOLLOW) != 0)
60			continue;
61		if (S_ISDIR(st.st_mode))
62			rm_r(dirfd, e->d_name, uid);
63		else if (S_ISLNK(st.st_mode) || st.st_uid == uid)
64			unlinkat(dirfd, e->d_name, 0);
65	}
66	closedir(d);
67	if (fstatat(rootfd, path, &st, AT_SYMLINK_NOFOLLOW) != 0)
68		return;
69	unlinkat(rootfd, path, S_ISDIR(st.st_mode) ? AT_REMOVEDIR : 0);
70}
71