/*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (C) 1996 * David L. Nugent. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint static const char rcsid[] = "$FreeBSD$"; #endif /* not lint */ #include <sys/stat.h> #include <dirent.h> #include <fcntl.h> #include <string.h> #include <unistd.h> #include "pwupd.h" void rm_r(int rootfd, const char *path, uid_t uid) { int dirfd; DIR *d; struct dirent *e; struct stat st; if (*path == '/') path++; dirfd = openat(rootfd, path, O_DIRECTORY); if (dirfd == -1) { return; } d = fdopendir(dirfd); while ((e = readdir(d)) != NULL) { if (strcmp(e->d_name, ".") == 0 || strcmp(e->d_name, "..") == 0) continue; if (fstatat(dirfd, e->d_name, &st, AT_SYMLINK_NOFOLLOW) != 0) continue; if (S_ISDIR(st.st_mode)) rm_r(dirfd, e->d_name, uid); else if (S_ISLNK(st.st_mode) || st.st_uid == uid) unlinkat(dirfd, e->d_name, 0); } closedir(d); if (fstatat(rootfd, path, &st, AT_SYMLINK_NOFOLLOW) != 0) return; unlinkat(rootfd, path, S_ISDIR(st.st_mode) ? AT_REMOVEDIR : 0); } |