274 lines
6.7 KiB
C
274 lines
6.7 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini copy_file implementation for busybox
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*
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* Copyright (C) 2001 by Matt Kraai <kraai@alumni.carnegiemellon.edu>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <utime.h>
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#include <errno.h>
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#include <dirent.h>
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#include <stdlib.h>
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#include <string.h>
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#include "busybox.h"
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int copy_file(const char *source, const char *dest, int flags)
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{
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struct stat source_stat;
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struct stat dest_stat;
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int dest_exists = 0;
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int status = 0;
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if ((!(flags & FILEUTILS_DEREFERENCE) &&
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lstat(source, &source_stat) < 0) ||
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((flags & FILEUTILS_DEREFERENCE) &&
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stat(source, &source_stat) < 0)) {
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bb_perror_msg("%s", source);
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return -1;
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}
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if (lstat(dest, &dest_stat) < 0) {
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if (errno != ENOENT) {
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bb_perror_msg("unable to stat `%s'", dest);
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return -1;
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}
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} else {
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if (source_stat.st_dev == dest_stat.st_dev &&
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source_stat.st_ino == dest_stat.st_ino)
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{
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bb_error_msg("`%s' and `%s' are the same file", source, dest);
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return -1;
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}
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dest_exists = 1;
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}
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if (S_ISDIR(source_stat.st_mode)) {
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DIR *dp;
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struct dirent *d;
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mode_t saved_umask = 0;
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if (!(flags & FILEUTILS_RECUR)) {
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bb_error_msg("%s: omitting directory", source);
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return -1;
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}
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/* Create DEST. */
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if (dest_exists) {
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if (!S_ISDIR(dest_stat.st_mode)) {
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bb_error_msg("`%s' is not a directory", dest);
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return -1;
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}
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} else {
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mode_t mode;
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saved_umask = umask(0);
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mode = source_stat.st_mode;
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if (!(flags & FILEUTILS_PRESERVE_STATUS))
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mode = source_stat.st_mode & ~saved_umask;
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mode |= S_IRWXU;
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if (mkdir(dest, mode) < 0) {
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umask(saved_umask);
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bb_perror_msg("cannot create directory `%s'", dest);
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return -1;
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}
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umask(saved_umask);
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}
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/* Recursively copy files in SOURCE. */
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if ((dp = opendir(source)) == NULL) {
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bb_perror_msg("unable to open directory `%s'", source);
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status = -1;
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goto end;
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}
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while ((d = readdir(dp)) != NULL) {
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char *new_source, *new_dest;
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new_source = concat_subpath_file(source, d->d_name);
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if(new_source == NULL)
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continue;
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new_dest = concat_path_file(dest, d->d_name);
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if (copy_file(new_source, new_dest, flags) < 0)
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status = -1;
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free(new_source);
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free(new_dest);
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}
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/* closedir have only EBADF error, but "dp" not changes */
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closedir(dp);
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if (!dest_exists &&
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chmod(dest, source_stat.st_mode & ~saved_umask) < 0) {
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bb_perror_msg("unable to change permissions of `%s'", dest);
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status = -1;
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}
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} else if (S_ISREG(source_stat.st_mode)) {
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int src_fd;
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int dst_fd;
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#ifdef CONFIG_FEATURE_PRESERVE_HARDLINKS
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char *link_name;
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if (!(flags & FILEUTILS_DEREFERENCE) &&
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is_in_ino_dev_hashtable(&source_stat, &link_name)) {
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if (link(link_name, dest) < 0) {
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bb_perror_msg("unable to link `%s'", dest);
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return -1;
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}
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return 0;
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}
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#endif
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src_fd = open(source, O_RDONLY);
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if (src_fd == -1) {
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bb_perror_msg("unable to open `%s'", source);
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return(-1);
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}
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if (dest_exists) {
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if (flags & FILEUTILS_INTERACTIVE) {
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bb_error_msg("overwrite `%s'? ", dest);
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if (!bb_ask_confirmation()) {
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close (src_fd);
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return 0;
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}
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}
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dst_fd = open(dest, O_WRONLY|O_TRUNC);
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if (dst_fd == -1) {
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if (!(flags & FILEUTILS_FORCE)) {
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bb_perror_msg("unable to open `%s'", dest);
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close(src_fd);
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return -1;
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}
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if (unlink(dest) < 0) {
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bb_perror_msg("unable to remove `%s'", dest);
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close(src_fd);
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return -1;
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}
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dest_exists = 0;
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}
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}
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if (!dest_exists) {
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dst_fd = open(dest, O_WRONLY|O_CREAT, source_stat.st_mode);
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if (dst_fd == -1) {
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bb_perror_msg("unable to open `%s'", dest);
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close(src_fd);
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return(-1);
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}
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}
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if (bb_copyfd_eof(src_fd, dst_fd) == -1)
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status = -1;
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if (close(dst_fd) < 0) {
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bb_perror_msg("unable to close `%s'", dest);
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status = -1;
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}
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if (close(src_fd) < 0) {
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bb_perror_msg("unable to close `%s'", source);
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status = -1;
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}
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}
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else if (S_ISBLK(source_stat.st_mode) || S_ISCHR(source_stat.st_mode) ||
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S_ISSOCK(source_stat.st_mode) || S_ISFIFO(source_stat.st_mode) ||
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S_ISLNK(source_stat.st_mode)) {
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if (dest_exists) {
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if((flags & FILEUTILS_FORCE) == 0) {
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fprintf(stderr, "`%s' exists\n", dest);
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return -1;
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}
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if(unlink(dest) < 0) {
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bb_perror_msg("unable to remove `%s'", dest);
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return -1;
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}
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}
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} else {
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bb_error_msg("internal error: unrecognized file type");
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return -1;
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}
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if (S_ISBLK(source_stat.st_mode) || S_ISCHR(source_stat.st_mode) ||
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S_ISSOCK(source_stat.st_mode)) {
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if (mknod(dest, source_stat.st_mode, source_stat.st_rdev) < 0) {
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bb_perror_msg("unable to create `%s'", dest);
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return -1;
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}
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} else if (S_ISFIFO(source_stat.st_mode)) {
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if (mkfifo(dest, source_stat.st_mode) < 0) {
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bb_perror_msg("cannot create fifo `%s'", dest);
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return -1;
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}
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} else if (S_ISLNK(source_stat.st_mode)) {
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char *lpath;
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lpath = xreadlink(source);
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if (symlink(lpath, dest) < 0) {
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bb_perror_msg("cannot create symlink `%s'", dest);
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return -1;
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}
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free(lpath);
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#if (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1)
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if (flags & FILEUTILS_PRESERVE_STATUS)
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if (lchown(dest, source_stat.st_uid, source_stat.st_gid) < 0)
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bb_perror_msg("unable to preserve ownership of `%s'", dest);
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#endif
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#ifdef CONFIG_FEATURE_PRESERVE_HARDLINKS
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add_to_ino_dev_hashtable(&source_stat, dest);
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#endif
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return 0;
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}
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#ifdef CONFIG_FEATURE_PRESERVE_HARDLINKS
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if (! S_ISDIR(source_stat.st_mode)) {
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add_to_ino_dev_hashtable(&source_stat, dest);
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}
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#endif
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end:
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if (flags & FILEUTILS_PRESERVE_STATUS) {
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struct utimbuf times;
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times.actime = source_stat.st_atime;
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times.modtime = source_stat.st_mtime;
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if (utime(dest, ×) < 0)
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bb_perror_msg("unable to preserve times of `%s'", dest);
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if (chown(dest, source_stat.st_uid, source_stat.st_gid) < 0) {
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source_stat.st_mode &= ~(S_ISUID | S_ISGID);
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bb_perror_msg("unable to preserve ownership of `%s'", dest);
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}
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if (chmod(dest, source_stat.st_mode) < 0)
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bb_perror_msg("unable to preserve permissions of `%s'", dest);
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}
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return status;
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}
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