src/true.c

   1 #include <config.h>
   2 #include <stdio.h>
   3 #include <sys/types.h>
   4 #include "system.h"
   5 #include "version-etc.h"
   6 #include "closeout.h"
   7
   8 #define PROGRAM_NAME "true"
   9 #define AUTHORS "no one"
  10
  11 /* The name this program was run with. */
  12 char *program_name;
  13
  14 void
  15 usage (int status)
  16 {
  17   printf (_("\
  18 Usage: %s [ignored command line arguments]\n\
  19   or:  %s OPTION\n\
  20 Exit with a status code indicating success.\n\
  21 \n\
  22 These option names may not be abbreviated.\n\
  23 \n\
  24   --help      display this help and exit\n\
  25   --version   output version information and exit\n\
  26 ")
  27           , program_name, program_name);
  28   puts (_("\nReport bugs to <bug-sh-utils@gnu.org>."));
  29   exit (status);
  30 }
  31
  32 int
  33 main (int argc, char **argv)
  34 {
  35   program_name = argv[0];
  36   setlocale (LC_ALL, "");
  37   bindtextdomain (PACKAGE, LOCALEDIR);
  38   textdomain (PACKAGE);
  39
  40   atexit (close_stdout);
  41
  42   /* Recognize --help or --version only if it's the only command-line
  43      argument and if POSIXLY_CORRECT is not set.  */
  44   if (argc == 2 && getenv ("POSIXLY_CORRECT") == NULL)
  45     {
  46       if (STREQ (argv[1], "--help"))
  47         usage (EXIT_SUCCESS);
  48
  49       if (STREQ (argv[1], "--version"))
  50         version_etc (stdout, PROGRAM_NAME, GNU_PACKAGE, VERSION, AUTHORS);
  51     }
  52
  53   exit (EXIT_SUCCESS);
  54 }