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/* vi: set sw=4 ts=4: */
/*
* Mini mv implementation for busybox
*
* Copyright (C) 2000 by Matt Kraai <kraai@alumni.carnegiemellon.edu>
* SELinux support by Yuichi Nakamura <ynakam@hitachisoft.jp>
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
*
* Size reduction and improved error checking.
*/
//config:config MV
//config: bool "mv (10 kb)"
//config: default y
//config: help
//config: mv is used to move or rename files or directories.
//applet:IF_MV(APPLET_NOEXEC(mv, mv, BB_DIR_BIN, BB_SUID_DROP, mv))
/* NOEXEC despite cases when it can be a "runner" (mv LARGE_DIR OTHER_FS) */
//kbuild:lib-$(CONFIG_MV) += mv.o
//usage:#define mv_trivial_usage
//usage: "[-finT] SOURCE DEST\n"
//usage: "or: mv [-fin] SOURCE... { -t DIRECTORY | DIRECTORY }"
//usage:#define mv_full_usage "\n\n"
//usage: "Rename SOURCE to DEST, or move SOURCEs to DIRECTORY\n"
//usage: "\n -f Don't prompt before overwriting"
//usage: "\n -i Interactive, prompt before overwrite"
//usage: "\n -n Don't overwrite an existing file"
//usage: "\n -T Refuse to move if DEST is a directory"
//usage: "\n -t DIR Move all SOURCEs into DIR"
//usage:
//usage:#define mv_example_usage
//usage: "$ mv /tmp/foo /bin/bar\n"
#include "libbb.h"
#include "libcoreutils/coreutils.h"
int mv_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int mv_main(int argc, char **argv)
{
struct stat statbuf;
const char *last;
const char *dest;
unsigned flags;
int dest_exists;
int status = 0;
int copy_flag = 0;
#define OPT_FORCE (1 << 0)
#define OPT_INTERACTIVE (1 << 1)
#define OPT_NOCLOBBER (1 << 2)
#define OPT_DESTNOTDIR (1 << 3)
#define OPT_DESTDIR (1 << 4)
#define OPT_VERBOSE ((1 << 5) * ENABLE_FEATURE_VERBOSE)
flags = getopt32long(argv, "^"
"finTt:v"
"\0"
/* At least one argument. (Usually two+, but -t DIR can have only one) */
"-1"
/* only the final one of -f, -i, -n takes effect */
":f-in:i-fn:n-fi"
/* -t and -T don't mix */
":t--T:T--t",
"interactive\0" No_argument "i"
"force\0" No_argument "f"
"no-clobber\0" No_argument "n"
"no-target-directory\0" No_argument "T"
"target-directory\0" Required_argument "t"
IF_FEATURE_VERBOSE(
"verbose\0" No_argument "v",
&last
)
);
argc -= optind;
argv += optind;
if (!(flags & OPT_DESTDIR)) {
last = argv[argc - 1];
if (argc < 2)
bb_show_usage();
if (argc != 2) {
if (flags & OPT_DESTNOTDIR)
bb_show_usage();
/* "mv A B C... DIR" - target must be dir */
} else /* argc == 2 */ {
/* "mv A B" - only case where target can be not a dir */
dest_exists = cp_mv_stat(last, &statbuf);
if (dest_exists < 0) { /* error other than ENOENT */
return EXIT_FAILURE;
}
if (!(dest_exists & 2)) {
/* last is not a directory */
dest = last;
goto DO_MOVE;
}
/* last is a directory */
if (flags & OPT_DESTNOTDIR) {
if (stat(argv[0], &statbuf) == 0 && !S_ISDIR(statbuf.st_mode))
bb_error_msg_and_die("'%s' is a directory", last);
/* "mv -T DIR1 DIR2" is allowed (renames a dir) */
dest = last;
goto DO_MOVE;
}
/* else: fall through into "do { move SRC to DIR/SRC } while" loop */
}
}
/* else: last is DIR from "-t DIR" */
do {
dest = concat_path_file(last, bb_get_last_path_component_strip(*argv));
dest_exists = cp_mv_stat(dest, &statbuf);
if (dest_exists < 0) {
goto RET_1;
}
DO_MOVE:
if (dest_exists) {
if (flags & OPT_NOCLOBBER)
goto RET_0;
if (!(flags & OPT_FORCE)
&& ((access(dest, W_OK) < 0 && isatty(0))
|| (flags & OPT_INTERACTIVE))
) {
if (fprintf(stderr, "mv: overwrite '%s'? ", dest) < 0) {
goto RET_1; /* Ouch! fprintf failed! */
}
if (!bb_ask_y_confirmation()) {
goto RET_0;
}
}
}
if (rename(*argv, dest) < 0) {
int source_exists;
if (errno != EXDEV
|| (source_exists = cp_mv_stat2(*argv, &statbuf, lstat)) < 1
) {
bb_perror_msg("can't rename '%s'", *argv);
} else {
static const char fmt[] ALIGN1 =
"can't overwrite %sdirectory with %sdirectory";
if (dest_exists) {
if (dest_exists == 3) {
if (source_exists != 3) {
bb_error_msg(fmt, "", "non-");
goto RET_1;
}
} else {
if (source_exists == 3) {
bb_error_msg(fmt, "non-", "");
goto RET_1;
}
}
if (unlink(dest) < 0) {
bb_perror_msg("can't remove '%s'", dest);
goto RET_1;
}
}
/* FILEUTILS_RECUR also prevents nasties like
* "read from device and write contents to dst"
* instead of "create same device node" */
copy_flag = FILEUTILS_RECUR | FILEUTILS_PRESERVE_STATUS;
#if ENABLE_SELINUX
copy_flag |= FILEUTILS_PRESERVE_SECURITY_CONTEXT;
#endif
if ((copy_file(*argv, dest, copy_flag) >= 0)
&& (remove_file(*argv, FILEUTILS_RECUR | FILEUTILS_FORCE) >= 0)
) {
goto RET_0;
}
}
RET_1:
status = 1;
}
RET_0:
if (flags & OPT_VERBOSE) {
printf("'%s' -> '%s'\n", *argv, dest);
}
if (dest != last) {
free((void *) dest);
}
} while (*++argv && *argv != last);
return status;
}
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