Convert all coreutils/* applets to "new style" applet definitions
[oweals/busybox.git] / coreutils / realpath.c
1 /* vi: set sw=4 ts=4: */
2 /* Mar 16, 2003      Manuel Novoa III   (mjn3@codepoet.org)
3  *
4  * Now does proper error checking on output and returns a failure exit code
5  * if one or more paths cannot be resolved.
6  *
7  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
8  */
9 //config:config REALPATH
10 //config:       bool "realpath"
11 //config:       default y
12 //config:       help
13 //config:         Return the canonicalized absolute pathname.
14 //config:         This isn't provided by GNU shellutils, but where else does it belong.
15
16 //applet:IF_REALPATH(APPLET(realpath, BB_DIR_USR_BIN, BB_SUID_DROP))
17
18 //kbuild:lib-$(CONFIG_REALPATH) += realpath.o
19
20 /* BB_AUDIT SUSv3 N/A -- Apparently a busybox extension. */
21
22 //usage:#define realpath_trivial_usage
23 //usage:       "FILE..."
24 //usage:#define realpath_full_usage "\n\n"
25 //usage:       "Return the absolute pathnames of given FILE"
26
27 #include "libbb.h"
28
29 int realpath_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
30 int realpath_main(int argc UNUSED_PARAM, char **argv)
31 {
32         int retval = EXIT_SUCCESS;
33
34         if (!*++argv) {
35                 bb_show_usage();
36         }
37
38         do {
39                 char *resolved_path = xmalloc_realpath(*argv);
40                 if (resolved_path != NULL) {
41                         puts(resolved_path);
42                         free(resolved_path);
43                 } else {
44                         retval = EXIT_FAILURE;
45                         bb_simple_perror_msg(*argv);
46                 }
47         } while (*++argv);
48
49         fflush_stdout_and_exit(retval);
50 }