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