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 28 static const char rcsid[] = 29 "$FreeBSD$"; 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 41 void 42 rm_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 if (dirfd == -1) { 54 return; 55 } 56 57 d = fdopendir(dirfd); 58 while ((e = readdir(d)) != NULL) { 59 if (strcmp(e->d_name, ".") == 0 || strcmp(e->d_name, "..") == 0) 60 continue; 61 62 if (fstatat(dirfd, e->d_name, &st, AT_SYMLINK_NOFOLLOW) != 0) 63 continue; 64 if (S_ISDIR(st.st_mode)) 65 rm_r(dirfd, e->d_name, uid); 66 else if (S_ISLNK(st.st_mode) || st.st_uid == uid) 67 unlinkat(dirfd, e->d_name, 0); 68 } 69 closedir(d); 70 if (fstatat(rootfd, path, &st, AT_SYMLINK_NOFOLLOW) != 0) 71 return; 72 unlinkat(rootfd, path, S_ISDIR(st.st_mode) ? AT_REMOVEDIR : 0); 73 } 74