rm.c

   1 /*
   2     Copyright © 2013 Alastair Stuart
   3
   4     This program is open source software: you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation, either version 3 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  12     GNU General Public License for more details.
  13 */
  14
  15 #include <errno.h>
  16 #include <stdbool.h>
  17 #include <stdio.h>
  18 #include <string.h>
  19
  20 #include <getopt.h>
  21 #include <unistd.h>
  22
  23 #define VERSION "0.01"
  24
  25 void usage(char* program)
  26 {
  27     printf("Usage: %s [options] [file ...]\n", program);
  28     printf("Deletes files.\n"
  29            "\n"
  30            "    --help     Print this message.\n"
  31            "    --version  Show version info.\n");
  32 }
  33
  34 int main(int argc, char* argv[])
  35 {
  36     bool errors = false;
  37
  38     static struct option long_options[] = {
  39         {"help",      no_argument, NULL,  1},
  40         {"version",   no_argument, NULL,  2},
  41         {NULL, 0, NULL, 0}
  42     };
  43
  44     int c = 0;
  45     while ((c = getopt_long(argc, argv, "",
  46                             long_options, NULL)) != -1)
  47     {
  48         switch (c)
  49         {
  50             case 1:
  51                 usage(argv[0]);
  52                 return 0;
  53             case 2:
  54                 printf("rm (mutos) v"VERSION"\n");
  55                 return 0;
  56             default:
  57                 fprintf(stderr,"Run '%s --help' for usage.\n",
  58                                      argv[0]);
  59                 return 1;
  60         }
  61     }
  62
  63     for (int i = optind; i < argc; i++)
  64     {
  65         int rc = unlink(argv[i]);
  66         if (rc != 0) {
  67             fprintf(stderr, "%s: %s: %s\n",
  68                              argv[0], strerror(errno), argv[i]);
  69             errors = true;
  70         }
  71     }
  72
  73     if (errors) {
  74         return 1;
  75     }
  76
  77     return 0;
  78 }