diff options
Diffstat (limited to 'usr.sbin/pw/cpdir.c')
| -rw-r--r-- | usr.sbin/pw/cpdir.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/usr.sbin/pw/cpdir.c b/usr.sbin/pw/cpdir.c new file mode 100644 index 000000000000..979323d64342 --- /dev/null +++ b/usr.sbin/pw/cpdir.c @@ -0,0 +1,154 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * 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. + */ + +#include <dirent.h> +#include <err.h> +#include <errno.h> +#include <fcntl.h> +#include <string.h> +#include <unistd.h> + +#include "pw.h" + +void +copymkdir(int rootfd, char const *dir, int skelfd, mode_t mode, uid_t uid, + gid_t gid, int flags) +{ + char *p, lnk[MAXPATHLEN]; + int len, srcfd, destfd; + ssize_t sz; + struct stat st; + struct dirent *e; + DIR *d; + mode_t pumask; + + if (*dir == '/') + dir++; + + pumask = umask(0); + umask(pumask); + + if (mkdirat(rootfd, dir, mode) != 0) { + + if (errno != EEXIST) { + warn("mkdir(%s)", dir); + return; + } + + if (fchmodat(rootfd, dir, mode & ~pumask, + AT_SYMLINK_NOFOLLOW) == -1) + warn("chmod(%s)", dir); + } + if (fchownat(rootfd, dir, uid, gid, AT_SYMLINK_NOFOLLOW) == -1) + warn("chown(%s)", dir); + if (flags > 0 && chflagsat(rootfd, dir, flags, + AT_SYMLINK_NOFOLLOW) == -1) + warn("chflags(%s)", dir); + metalog_emit(dir, (mode | S_IFDIR) & ~pumask, uid, gid, flags); + + if (skelfd == -1) + return; + + if ((d = fdopendir(skelfd)) == NULL) { + close(skelfd); + return; + } + + while ((e = readdir(d)) != NULL) { + char path[MAXPATHLEN]; + + if (strcmp(e->d_name, ".") == 0 || strcmp(e->d_name, "..") == 0) + continue; + + p = e->d_name; + if (fstatat(skelfd, p, &st, AT_SYMLINK_NOFOLLOW) == -1) + continue; + + if (strncmp(p, "dot.", 4) == 0) /* Conversion */ + p += 3; + (void)snprintf(path, sizeof(path), "%s/%s", dir, p); + + if (S_ISDIR(st.st_mode)) { + int fd; + + fd = openat(skelfd, e->d_name, O_DIRECTORY); + if (fd == -1) { + warn("openat(%s)", e->d_name); + continue; + } + copymkdir(rootfd, path, fd, st.st_mode & _DEF_DIRMODE, + uid, gid, st.st_flags); + continue; + } + + if (S_ISLNK(st.st_mode) && + (len = readlinkat(skelfd, e->d_name, lnk, sizeof(lnk) - 1)) + != -1) { + lnk[len] = '\0'; + if (symlinkat(lnk, rootfd, path) != 0) + warn("symlink(%s)", path); + else if (fchownat(rootfd, path, uid, gid, + AT_SYMLINK_NOFOLLOW) != 0) + warn("chown(%s)", path); + metalog_emit_symlink(path, lnk, st.st_mode & ~pumask, + uid, gid); + continue; + } + + if (!S_ISREG(st.st_mode)) + continue; + + if ((srcfd = openat(skelfd, e->d_name, O_RDONLY)) == -1) + continue; + destfd = openat(rootfd, path, O_RDWR | O_CREAT | O_EXCL, + st.st_mode); + if (destfd == -1) { + close(srcfd); + continue; + } + + do { + sz = copy_file_range(srcfd, NULL, destfd, NULL, + SSIZE_MAX, 0); + } while (sz > 0); + if (sz < 0) + warn("copy_file_range"); + + close(srcfd); + /* + * Propagate special filesystem flags + */ + if (fchown(destfd, uid, gid) != 0) + warn("chown(%s)", p); + if (fchflags(destfd, st.st_flags) != 0) + warn("chflags(%s)", p); + metalog_emit(path, st.st_mode & ~pumask, uid, gid, st.st_flags); + close(destfd); + } + closedir(d); +} |