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 "busybox.h"
  14
  15 int realpath_main(int argc, char **argv)
  16 {
  17         int retval = EXIT_SUCCESS;
  18
  19 #if PATH_MAX > (BUFSIZ+1)
  20         RESERVE_CONFIG_BUFFER(resolved_path, PATH_MAX);
  21 # define resolved_path_MUST_FREE 1
  22 #else
  23 #define resolved_path bb_common_bufsiz1
  24 # define resolved_path_MUST_FREE 0
  25 #endif
  26
  27         if (--argc == 0) {
  28                 bb_show_usage();
  29         }
  30
  31         do {
  32                 argv++;
  33                 if (realpath(*argv, resolved_path) != NULL) {
  34                         puts(resolved_path);
  35                 } else {
  36                         retval = EXIT_FAILURE;
  37                         bb_perror_msg("%s", *argv);
  38                 }
  39         } while (--argc);
  40
  41 #if ENABLE_FEATURE_CLEAN_UP && resolved_path_MUST_FREE
  42         RELEASE_CONFIG_BUFFER(resolved_path);
  43 #endif
  44
  45         fflush_stdout_and_exit(retval);
  46 }