coreutils/realpath.c

   1 /* vi: set sw=4 ts=4: */
   2
   3 /* BB_AUDIT SUSv3 N/A -- Apparently a busybox extension. */
   4
   5 /* Mar 16, 2003      Manuel Novoa III   (mjn3@codepoet.org)
   6  *
   7  * Now does proper error checking on output and returns a failure exit code
   8  * if one or more paths cannot be resolved.
   9  *
  10  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
  11  */
  12
  13 #include <limits.h>
  14 #include <stdlib.h>
  15 #include "busybox.h"
  16
  17 int realpath_main(int argc, char **argv)
  18 {
  19         int retval = EXIT_SUCCESS;
  20
  21 #if PATH_MAX > (BUFSIZ+1)
  22         RESERVE_CONFIG_BUFFER(resolved_path, PATH_MAX);
  23 # define resolved_path_MUST_FREE 1
  24 #else
  25 #define resolved_path bb_common_bufsiz1
  26 # define resolved_path_MUST_FREE 0
  27 #endif
  28
  29         if (--argc == 0) {
  30                 bb_show_usage();
  31         }
  32
  33         do {
  34                 argv++;
  35                 if (realpath(*argv, resolved_path) != NULL) {
  36                         puts(resolved_path);
  37                 } else {
  38                         retval = EXIT_FAILURE;
  39                         bb_perror_msg("%s", *argv);
  40                 }
  41         } while (--argc);
  42
  43 #if ENABLE_FEATURE_CLEAN_UP && resolved_path_MUST_FREE
  44         RELEASE_CONFIG_BUFFER(resolved_path);
  45 #endif
  46
  47         bb_fflush_stdout_and_exit(retval);
  48 }