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https://github.com/freebsd/freebsd-src
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eba230afba
These do not use __FBSDID but instead use bare char arrays. Reviewed by: imp, emaste Differential Revision: https://reviews.freebsd.org/D41957
121 lines
3.3 KiB
C
121 lines
3.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (C) 1996
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* David L. Nugent. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <dirent.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <string.h>
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#include <unistd.h>
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#include "pw.h"
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void
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copymkdir(int rootfd, char const * dir, int skelfd, mode_t mode, uid_t uid,
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gid_t gid, int flags)
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{
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char *p, lnk[MAXPATHLEN], copybuf[4096];
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int len, homefd, srcfd, destfd;
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ssize_t sz;
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struct stat st;
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struct dirent *e;
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DIR *d;
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if (*dir == '/')
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dir++;
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if (mkdirat(rootfd, dir, mode) != 0 && errno != EEXIST) {
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warn("mkdir(%s)", dir);
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return;
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}
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fchownat(rootfd, dir, uid, gid, AT_SYMLINK_NOFOLLOW);
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if (flags > 0)
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chflagsat(rootfd, dir, flags, AT_SYMLINK_NOFOLLOW);
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if (skelfd == -1)
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return;
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homefd = openat(rootfd, dir, O_DIRECTORY);
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if ((d = fdopendir(skelfd)) == NULL) {
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close(skelfd);
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close(homefd);
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return;
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}
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while ((e = readdir(d)) != NULL) {
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if (strcmp(e->d_name, ".") == 0 || strcmp(e->d_name, "..") == 0)
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continue;
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p = e->d_name;
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if (fstatat(skelfd, p, &st, AT_SYMLINK_NOFOLLOW) == -1)
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continue;
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if (strncmp(p, "dot.", 4) == 0) /* Conversion */
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p += 3;
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if (S_ISDIR(st.st_mode)) {
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copymkdir(homefd, p, openat(skelfd, e->d_name, O_DIRECTORY),
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st.st_mode & _DEF_DIRMODE, uid, gid, st.st_flags);
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continue;
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}
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if (S_ISLNK(st.st_mode) &&
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(len = readlinkat(skelfd, e->d_name, lnk, sizeof(lnk) -1))
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!= -1) {
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lnk[len] = '\0';
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symlinkat(lnk, homefd, p);
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fchownat(homefd, p, uid, gid, AT_SYMLINK_NOFOLLOW);
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continue;
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}
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if (!S_ISREG(st.st_mode))
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continue;
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if ((srcfd = openat(skelfd, e->d_name, O_RDONLY)) == -1)
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continue;
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destfd = openat(homefd, p, O_RDWR | O_CREAT | O_EXCL,
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st.st_mode);
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if (destfd == -1) {
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close(srcfd);
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continue;
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}
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while ((sz = read(srcfd, copybuf, sizeof(copybuf))) > 0)
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write(destfd, copybuf, sz);
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close(srcfd);
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/*
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* Propagate special filesystem flags
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*/
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fchown(destfd, uid, gid);
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fchflags(destfd, st.st_flags);
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close(destfd);
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}
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closedir(d);
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}
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