apps/utils/pwd.c

   1 /*
   2     meinOS - A unix-like x86 microkernel operating system
   3     Copyright (C) 2008  Janosch Gräf <janosch.graef@gmx.net>
   4
   5     This program is free software: you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation, either version 3 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 */
  18
  19 #include <stdio.h>
  20
  21 static void usage(char *cmd,int ret) {
  22   FILE *stream = ret==0?stdout:stderr;
  23   fprintf(stream,"Usage: %s [OPTION]... [STRING]...\n");
  24   fprintf(stream,"Print current work directory\n");
  25   fprintf(stream,"\t-h\tshow this help message\n");
  26   fprintf(stream,"\t-v\toutput version information and exit\n");
  27 }
  28
  29 int main(int argc,char *argv[]) {
  30   int c;
  31
  32   while ((c = getopt(argc,argv,":hv"))!=-1) {
  33     switch(c) {
  34       case 'h':
  35         usage(argv[0],0);
  36         break;
  37       case 'v':
  38         printf("pwd v0.1\n(c) 2008 Janosch Graef\n");
  39         return 0;
  40         break;
  41       case '?':
  42         fprintf(stderr,"Unrecognized option: -%c\n", optopt);
  43         usage(argv[0],1);
  44         break;
  45     }
  46   }
  47
  48   char *cwd = getcwd(NULL,0);
  49   if (cwd!=NULL) {
  50     puts(cwd);
  51     free(cwd);
  52     return 0;
  53   }
  54   else return 1;
  55 }