/*
* Mini copy_file implementation for busybox
*
- *
* Copyright (C) 2001 by Matt Kraai <kraai@alumni.carnegiemellon.edu>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*
*/
#include <errno.h>
#include <dirent.h>
#include <stdlib.h>
+#include <string.h>
#include "libbb.h"
+/* Compiler version-specific crap that should be in a header file somewhere. */
+
+#if !((__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1))
+#define lchown chown
+#endif
+
+
int copy_file(const char *source, const char *dest, int flags)
{
struct stat source_stat;
struct stat dest_stat;
- int dest_exists = 1;
+ int dest_exists = 0;
int status = 0;
- if (((flags & FILEUTILS_PRESERVE_SYMLINKS) &&
+ if ((!(flags & FILEUTILS_DEREFERENCE) &&
lstat(source, &source_stat) < 0) ||
- (!(flags & FILEUTILS_PRESERVE_SYMLINKS) &&
+ ((flags & FILEUTILS_DEREFERENCE) &&
stat(source, &source_stat) < 0)) {
- perror_msg("%s", source);
+ bb_perror_msg("%s", source);
return -1;
}
- if (stat(dest, &dest_stat) < 0) {
+ if (lstat(dest, &dest_stat) < 0) {
if (errno != ENOENT) {
- perror_msg("unable to stat `%s'", dest);
+ bb_perror_msg("unable to stat `%s'", dest);
return -1;
}
- dest_exists = 0;
- }
-
- if (dest_exists && source_stat.st_rdev == dest_stat.st_rdev &&
- source_stat.st_ino == dest_stat.st_ino) {
- error_msg("`%s' and `%s' are the same file", source, dest);
- return -1;
+ } else {
+ if (source_stat.st_dev == dest_stat.st_dev &&
+ source_stat.st_ino == dest_stat.st_ino)
+ {
+ bb_error_msg("`%s' and `%s' are the same file", source, dest);
+ return -1;
+ }
+ dest_exists = 1;
}
if (S_ISDIR(source_stat.st_mode)) {
mode_t saved_umask = 0;
if (!(flags & FILEUTILS_RECUR)) {
- error_msg("%s: omitting directory", source);
+ bb_error_msg("%s: omitting directory", source);
return -1;
}
/* Create DEST. */
if (dest_exists) {
if (!S_ISDIR(dest_stat.st_mode)) {
- error_msg("`%s' is not a directory", dest);
+ bb_error_msg("`%s' is not a directory", dest);
return -1;
}
} else {
if (mkdir(dest, mode) < 0) {
umask(saved_umask);
- perror_msg("cannot create directory `%s'", dest);
+ bb_perror_msg("cannot create directory `%s'", dest);
return -1;
}
umask(saved_umask);
}
-
+
/* Recursively copy files in SOURCE. */
- if ((dp = opendir(source)) == NULL) {
- perror_msg("unable to open directory `%s'", source);
+ if ((dp = bb_opendir(source)) == NULL) {
status = -1;
- goto end;
+ goto preserve_status;
}
while ((d = readdir(dp)) != NULL) {
char *new_source, *new_dest;
- if (strcmp(d->d_name, ".") == 0 ||
- strcmp(d->d_name, "..") == 0)
+ new_source = concat_subpath_file(source, d->d_name);
+ if(new_source == NULL)
continue;
-
- new_source = concat_path_file(source, d->d_name);
new_dest = concat_path_file(dest, d->d_name);
if (copy_file(new_source, new_dest, flags) < 0)
status = -1;
free(new_source);
free(new_dest);
}
-
- /* ??? What if an error occurs in readdir? */
-
- if (closedir(dp) < 0) {
- perror_msg("unable to close directory `%s'", source);
- status = -1;
- }
+ /* closedir have only EBADF error, but "dp" not changes */
+ closedir(dp);
if (!dest_exists &&
chmod(dest, source_stat.st_mode & ~saved_umask) < 0) {
- perror_msg("unable to change permissions of `%s'", dest);
+ bb_perror_msg("unable to change permissions of `%s'", dest);
status = -1;
}
- } else if (S_ISREG(source_stat.st_mode)) {
- FILE *sfp, *dfp;
+ } else if (S_ISREG(source_stat.st_mode) || (flags & FILEUTILS_DEREFERENCE))
+ {
+ int src_fd;
+ int dst_fd;
+#ifdef CONFIG_FEATURE_PRESERVE_HARDLINKS
+ char *link_name;
+
+ if (!(flags & FILEUTILS_DEREFERENCE) &&
+ is_in_ino_dev_hashtable(&source_stat, &link_name)) {
+ if (link(link_name, dest) < 0) {
+ bb_perror_msg("unable to link `%s'", dest);
+ return -1;
+ }
+
+ return 0;
+ }
+ add_to_ino_dev_hashtable(&source_stat, dest);
+#endif
+ src_fd = open(source, O_RDONLY);
+ if (src_fd == -1) {
+ bb_perror_msg("unable to open `%s'", source);
+ return(-1);
+ }
if (dest_exists) {
if (flags & FILEUTILS_INTERACTIVE) {
- fprintf(stderr, "%s: overwrite `%s'? ", applet_name, dest);
- if (!ask_confirmation())
+ fprintf(stderr, "%s: overwrite `%s'? ", bb_applet_name, dest);
+ if (!bb_ask_confirmation()) {
+ close (src_fd);
return 0;
+ }
}
- if ((dfp = fopen(dest, "w")) == NULL) {
+ dst_fd = open(dest, O_WRONLY|O_TRUNC);
+ if (dst_fd == -1) {
if (!(flags & FILEUTILS_FORCE)) {
- perror_msg("unable to open `%s'", dest);
+ bb_perror_msg("unable to open `%s'", dest);
+ close(src_fd);
return -1;
}
if (unlink(dest) < 0) {
- perror_msg("unable to remove `%s'", dest);
+ bb_perror_msg("unable to remove `%s'", dest);
+ close(src_fd);
return -1;
}
- dest_exists = 0;
+ goto dest_removed;
}
- }
-
- if (!dest_exists) {
- int fd;
-
- if ((fd = open(dest, O_WRONLY|O_CREAT, source_stat.st_mode)) < 0 ||
- (dfp = fdopen(fd, "w")) == NULL) {
- if (fd >= 0)
- close(fd);
- perror_msg("unable to open `%s'", dest);
- return -1;
+ } else {
+dest_removed:
+ dst_fd = open(dest, O_WRONLY|O_CREAT, source_stat.st_mode);
+ if (dst_fd == -1) {
+ bb_perror_msg("unable to open `%s'", dest);
+ close(src_fd);
+ return(-1);
}
}
- if ((sfp = fopen(source, "r")) == NULL) {
- fclose(dfp);
- perror_msg("unable to open `%s'", source);
+ if (bb_copyfd_eof(src_fd, dst_fd) == -1)
status = -1;
- goto end;
- }
-
- copy_file_chunk(sfp, dfp, source_stat.st_size);
- if (fclose(dfp) < 0) {
- perror_msg("unable to close `%s'", dest);
+ if (close(dst_fd) < 0) {
+ bb_perror_msg("unable to close `%s'", dest);
status = -1;
}
- if (fclose(sfp) < 0) {
- perror_msg("unable to close `%s'", source);
+ if (close(src_fd) < 0) {
+ bb_perror_msg("unable to close `%s'", source);
status = -1;
}
} else if (S_ISBLK(source_stat.st_mode) || S_ISCHR(source_stat.st_mode) ||
- S_ISSOCK(source_stat.st_mode)) {
- if (mknod(dest, source_stat.st_mode, source_stat.st_rdev) < 0) {
- perror_msg("unable to create `%s'", dest);
- return -1;
- }
- } else if (S_ISFIFO(source_stat.st_mode)) {
- if (mkfifo(dest, source_stat.st_mode) < 0) {
- perror_msg("cannot create fifo `%s'", dest);
- return -1;
- }
- } else if (S_ISLNK(source_stat.st_mode)) {
- int size;
- char buf[BUFSIZ + 1];
+ S_ISSOCK(source_stat.st_mode) || S_ISFIFO(source_stat.st_mode) ||
+ S_ISLNK(source_stat.st_mode)) {
- if ((size = readlink(source, buf, BUFSIZ)) < 0) {
- perror_msg("cannot read `%s'", source);
- return -1;
+ if (dest_exists) {
+ if((flags & FILEUTILS_FORCE) == 0) {
+ fprintf(stderr, "`%s' exists\n", dest);
+ return -1;
+ }
+ if(unlink(dest) < 0) {
+ bb_perror_msg("unable to remove `%s'", dest);
+ return -1;
+ }
}
- buf[size] = '\0';
+ if (S_ISFIFO(source_stat.st_mode)) {
+ if (mkfifo(dest, source_stat.st_mode) < 0) {
+ bb_perror_msg("cannot create fifo `%s'", dest);
+ return -1;
+ }
+ } else if (S_ISLNK(source_stat.st_mode)) {
+ char *lpath;
- if (symlink(buf, dest) < 0) {
- perror_msg("cannot create symlink `%s'", dest);
- return -1;
- }
+ lpath = xreadlink(source);
+ if (symlink(lpath, dest) < 0) {
+ bb_perror_msg("cannot create symlink `%s'", dest);
+ return -1;
+ }
+ free(lpath);
-#if (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1)
- if (flags & FILEUTILS_PRESERVE_STATUS)
- if (lchown(dest, source_stat.st_uid, source_stat.st_gid) < 0)
- perror_msg("unable to preserve ownership of `%s'", dest);
-#endif
- return 0;
+ if (flags & FILEUTILS_PRESERVE_STATUS)
+ if (lchown(dest, source_stat.st_uid, source_stat.st_gid) < 0)
+ bb_perror_msg("unable to preserve ownership of `%s'", dest);
+
+ return 0;
+
+ } else {
+ if (mknod(dest, source_stat.st_mode, source_stat.st_rdev) < 0) {
+ bb_perror_msg("unable to create `%s'", dest);
+ return -1;
+ }
+ }
} else {
- error_msg("internal error: unrecognized file type");
+ bb_error_msg("internal error: unrecognized file type");
return -1;
}
-end:
+preserve_status:
if (flags & FILEUTILS_PRESERVE_STATUS) {
struct utimbuf times;
+ char *msg="unable to preserve %s of `%s'";
times.actime = source_stat.st_atime;
times.modtime = source_stat.st_mtime;
if (utime(dest, ×) < 0)
- perror_msg("unable to preserve times of `%s'", dest);
+ bb_perror_msg(msg, "times", dest);
if (chown(dest, source_stat.st_uid, source_stat.st_gid) < 0) {
source_stat.st_mode &= ~(S_ISUID | S_ISGID);
- perror_msg("unable to preserve ownership of `%s'", dest);
+ bb_perror_msg(msg, "ownership", dest);
}
if (chmod(dest, source_stat.st_mode) < 0)
- perror_msg("unable to preserve permissions of `%s'", dest);
+ bb_perror_msg(msg, "permissions", dest);
}
return status;
projects / oweals / busybox.git / blobdiff