debianutils/which.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Which implementation for busybox
   4  *
   5  * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
   6  * Copyright (C) 2006 Gabriel Somlo <somlo at cmu.edu>
   7  *
   8  * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
   9  *
  10  * Based on which from debianutils
  11  */
  12
  13 #include "busybox.h"
  14
  15 int which_main(int argc, char **argv)
  16 {
  17         int status = EXIT_SUCCESS;
  18         char *p;
  19
  20         if (argc <= 1 || argv[1][0] == '-') {
  21                 bb_show_usage();
  22         }
  23
  24         while (--argc > 0) {
  25                 argv++;
  26                 if (strchr(*argv, '/')) {
  27                         if (execable_file(*argv)) {
  28                                 puts(*argv);
  29                                 continue;
  30                         }
  31                 } else {
  32                         p = find_execable(*argv);
  33                         if (p) {
  34                                 puts(p);
  35                                 free(p);
  36                                 continue;
  37                         }
  38                 }
  39                 status = EXIT_FAILURE;
  40         }
  41
  42         bb_fflush_stdout_and_exit(status);
  43 }