/* vi: set sw=4 ts=4: */
/*
- * Utility routines.
+ * Mini copy_file implementation for busybox
*
- * Copyright (C) tons of folks. Tracking down who wrote what
- * isn't something I'm going to worry about... If you wrote something
- * here, please feel free to acknowledge your work.
+ *
+ * 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
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
- * Based in part on code from sash, Copyright (c) 1999 by David I. Bell
- * Permission has been granted to redistribute this code under the GPL.
- *
*/
-#include <stdio.h>
-#include <errno.h>
-#include <utime.h>
+#include <sys/types.h>
+#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
-#include <sys/stat.h>
-#include "libbb.h"
+#include <utime.h>
+#include <errno.h>
+#include <dirent.h>
+#include <stdlib.h>
+#include <string.h>
+#include "libbb.h"
-/*
- * Copy one file to another, while possibly preserving its modes, times, and
- * modes. Returns TRUE if successful, or FALSE on a failure with an error
- * message output. (Failure is not indicated if attributes cannot be set.)
- * -Erik Andersen
- */
-int
-copy_file(const char *src_name, const char *dst_name,
- int set_modes, int follow_links, int force_flag, int quiet_flag)
+int copy_file(const char *source, const char *dest, int flags)
{
- FILE *src_file = NULL;
- FILE *dst_file = NULL;
- struct stat srcStatBuf;
- struct stat dstStatBuf;
- struct utimbuf times;
- int src_status;
- int dst_status;
-
- if (follow_links == TRUE) {
- src_status = stat(src_name, &srcStatBuf);
- dst_status = stat(dst_name, &dstStatBuf);
- } else {
- src_status = lstat(src_name, &srcStatBuf);
- dst_status = lstat(dst_name, &dstStatBuf);
+ struct stat source_stat;
+ struct stat dest_stat;
+ int dest_exists = 1;
+ int status = 0;
+
+ if (((flags & FILEUTILS_PRESERVE_SYMLINKS) &&
+ lstat(source, &source_stat) < 0) ||
+ (!(flags & FILEUTILS_PRESERVE_SYMLINKS) &&
+ stat(source, &source_stat) < 0)) {
+ perror_msg("%s", source);
+ return -1;
}
- if (src_status < 0) {
- if (!quiet_flag) {
- perror_msg("%s", src_name);
+ if (stat(dest, &dest_stat) < 0) {
+ if (errno != ENOENT) {
+ perror_msg("unable to stat `%s'", dest);
+ return -1;
}
- return FALSE;
+ dest_exists = 0;
}
- if ((dst_status < 0) || force_flag) {
- unlink(dst_name);
- dstStatBuf.st_ino = -1;
- dstStatBuf.st_dev = -1;
+ 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;
}
- if ((srcStatBuf.st_dev == dstStatBuf.st_dev) &&
- (srcStatBuf.st_ino == dstStatBuf.st_ino)) {
- if (!quiet_flag) {
- error_msg("Copying file \"%s\" to itself", src_name);
+ if (S_ISDIR(source_stat.st_mode)) {
+ DIR *dp;
+ struct dirent *d;
+ mode_t saved_umask = 0;
+
+ if (!(flags & FILEUTILS_RECUR)) {
+ error_msg("%s: omitting directory", source);
+ return -1;
}
- return FALSE;
- }
- if (S_ISDIR(srcStatBuf.st_mode)) {
- //fprintf(stderr, "copying directory %s to %s\n", srcName, destName);
- /* Make sure the directory is writable */
- dst_status = create_path(dst_name, 0777777 ^ umask(0));
- if ((dst_status < 0) && (errno != EEXIST)) {
- if (!quiet_flag) {
- perror_msg("%s", dst_name);
+ /* Create DEST. */
+ if (dest_exists) {
+ if (!S_ISDIR(dest_stat.st_mode)) {
+ error_msg("`%s' is not a directory", dest);
+ return -1;
}
- return FALSE;
- }
- } else if (S_ISLNK(srcStatBuf.st_mode)) {
- char link_val[BUFSIZ + 1];
- int link_size;
-
- //fprintf(stderr, "copying link %s to %s\n", srcName, destName);
- /* Warning: This could possibly truncate silently, to BUFSIZ chars */
- link_size = readlink(src_name, &link_val[0], BUFSIZ);
- if (link_size < 0) {
- if (quiet_flag) {
- perror_msg("%s", src_name);
+ } else {
+ mode_t mode;
+ saved_umask = umask(0);
+
+ mode = source_stat.st_mode;
+ if (!(flags & FILEUTILS_PRESERVE_STATUS))
+ mode = source_stat.st_mode & ~saved_umask;
+ mode |= S_IRWXU;
+
+ if (mkdir(dest, mode) < 0) {
+ umask(saved_umask);
+ perror_msg("cannot create directory `%s'", dest);
+ return -1;
}
- return FALSE;
+
+ umask(saved_umask);
}
- link_val[link_size] = '\0';
- src_status = symlink(link_val, dst_name);
- if (src_status < 0) {
- if (!quiet_flag) {
- perror_msg("%s", dst_name);
- }
- return FALSE;
+
+ /* Recursively copy files in SOURCE. */
+ if ((dp = opendir(source)) == NULL) {
+ perror_msg("unable to open directory `%s'", source);
+ status = -1;
+ goto end;
}
-#if (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1)
- if (set_modes == TRUE) {
- /* Try to set owner, but fail silently like GNU cp */
- lchown(dst_name, srcStatBuf.st_uid, srcStatBuf.st_gid);
+
+ while ((d = readdir(dp)) != NULL) {
+ char *new_source, *new_dest;
+
+ if (strcmp(d->d_name, ".") == 0 ||
+ strcmp(d->d_name, "..") == 0)
+ 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);
}
-#endif
- return TRUE;
- } else if (S_ISFIFO(srcStatBuf.st_mode)) {
- //fprintf(stderr, "copying fifo %s to %s\n", srcName, destName);
- if (mkfifo(dst_name, 0644) < 0) {
- if (!quiet_flag) {
- perror_msg("%s", dst_name);
- }
- return FALSE;
- }
- } else if (S_ISBLK(srcStatBuf.st_mode) || S_ISCHR(srcStatBuf.st_mode)
- || S_ISSOCK(srcStatBuf.st_mode)) {
- //fprintf(stderr, "copying soc, blk, or chr %s to %s\n", srcName, destName);
- if (mknod(dst_name, srcStatBuf.st_mode, srcStatBuf.st_rdev) < 0) {
- if (!quiet_flag) {
- perror_msg("%s", dst_name);
+
+ /* ??? What if an error occurs in readdir? */
+
+ if (closedir(dp) < 0) {
+ perror_msg("unable to close directory `%s'", source);
+ status = -1;
+ }
+
+ if (!dest_exists &&
+ chmod(dest, source_stat.st_mode & ~saved_umask) < 0) {
+ perror_msg("unable to change permissions of `%s'", dest);
+ status = -1;
+ }
+ } else if (S_ISREG(source_stat.st_mode)) {
+ FILE *sfp, *dfp;
+
+ if (dest_exists) {
+ if (flags & FILEUTILS_INTERACTIVE) {
+ fprintf(stderr, "%s: overwrite `%s'? ", applet_name, dest);
+ if (!ask_confirmation())
+ return 0;
}
- return FALSE;
- }
- } else if (S_ISREG(srcStatBuf.st_mode)) {
- //fprintf(stderr, "copying regular file %s to %s\n", srcName, destName);
- src_file = fopen(src_name, "r");
- if (src_file == NULL) {
- if (!quiet_flag) {
- perror_msg("%s", src_name);
+
+ if ((dfp = fopen(dest, "w")) == NULL) {
+ if (!(flags & FILEUTILS_FORCE)) {
+ perror_msg("unable to open `%s'", dest);
+ return -1;
+ }
+
+ if (unlink(dest) < 0) {
+ perror_msg("unable to remove `%s'", dest);
+ return -1;
+ }
+
+ dest_exists = 0;
}
- return FALSE;
}
- dst_file = fopen(dst_name, "w");
- if (dst_file == NULL) {
- if (!quiet_flag) {
- perror_msg("%s", dst_name);
+ 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;
}
- fclose(src_file);
- return FALSE;
}
- if (copy_file_chunk(src_file, dst_file, srcStatBuf.st_size)==FALSE) {
- goto error_exit;
+ if ((sfp = fopen(source, "r")) == NULL) {
+ fclose(dfp);
+ perror_msg("unable to open `%s'", source);
+ status = -1;
+ goto end;
}
- fclose(src_file);
- if (fclose(dst_file) < 0) {
- return FALSE;
+ if (copy_file_chunk(sfp, dfp, -1) < 0)
+ status = -1;
+
+ if (fclose(dfp) < 0) {
+ perror_msg("unable to close `%s'", dest);
+ status = -1;
}
- }
- if (set_modes == TRUE) {
- /* This is fine, since symlinks never get here */
- if (chown(dst_name, srcStatBuf.st_uid, srcStatBuf.st_gid) < 0)
- perror_msg("%s", dst_name);
- if (chmod(dst_name, srcStatBuf.st_mode) < 0)
- perror_msg("%s", dst_name);
- times.actime = srcStatBuf.st_atime;
- times.modtime = srcStatBuf.st_mtime;
- if (utime(dst_name, ×) < 0)
- perror_msg("%s", dst_name);
+ if (fclose(sfp) < 0) {
+ 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)) {
+ char *lpath = xreadlink(source);
+ if (symlink(lpath, dest) < 0) {
+ 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;
+ } else {
+ error_msg("internal error: unrecognized file type");
+ return -1;
}
- return TRUE;
+end:
-error_exit:
- perror_msg("%s", dst_name);
- fclose(src_file);
- fclose(dst_file);
+ if (flags & FILEUTILS_PRESERVE_STATUS) {
+ struct utimbuf times;
- return FALSE;
-}
+ 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);
+ 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);
+ }
+ if (chmod(dest, source_stat.st_mode) < 0)
+ perror_msg("unable to preserve permissions of `%s'", dest);
+ }
-/* END CODE */
-/*
-Local Variables:
-c-file-style: "linux"
-c-basic-offset: 4
-tab-width: 4
-End:
-*/
+ return status;
+}
projects / oweals / busybox.git / blobdiff