source: vendor/bash/3.1/support/bashversion.c

/* bashversion.c -- Display bash version information. */

/* Copyright (C) 2001 Free Software Foundation, Inc.

   This file is part of GNU Bash, the Bourne Again SHell.

   Bash is free software; you can redistribute it and/or modify it under
   the terms of the GNU General Public License as published by the Free
   Software Foundation; either version 2, or (at your option) any later
   version.

   Bash is distributed in the hope that it will be useful, but WITHOUT ANY
   WARRANTY; without even the implied warranty of MERCHANTABILITY or
   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   for more details.

   You should have received a copy of the GNU General Public License along
   with Bash; see the file COPYING.  If not, write to the Free Software
   Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */

#include "config.h"

#include "stdc.h"

#include <stdio.h>

#if defined (HAVE_UNISTD_H)
#  include <unistd.h>
#endif

#include "bashansi.h"

#include "version.h"
#include "conftypes.h"

#define RFLAG   0x0001
#define VFLAG   0x0002
#define MFLAG   0x0004
#define PFLAG   0x0008
#define SFLAG   0x0010
#define LFLAG   0x0020
#define XFLAG   0x0040

extern int optind;
extern char *optarg;

extern char *dist_version;
extern int patch_level;

char *shell_name = "bash";
char *progname;

static void
usage()
{
  fprintf(stderr, "%s: usage: %s [-hrvpmlsx]\n", progname, progname);
}

int
main (argc, argv)
     int argc;
     char **argv;
{
  int opt, oflags;
  char dv[128], *rv;

  if (progname = strrchr (argv[0], '/'))
    progname++;
  else
    progname = argv[0];

  oflags = 0;
  while ((opt = getopt(argc, argv, "hrvmpslx")) != EOF)
    {
      switch (opt)
        {
        case 'h':
          usage ();
          exit (0);
        case 'r':
          oflags |= RFLAG;      /* release */
          break;
        case 'v':
          oflags |= VFLAG;      /* version */
          break;
        case 'm':
          oflags |= MFLAG;      /* machtype */
          break;
        case 'p':
          oflags |= PFLAG;      /* patchlevel */
          break;
        case 's':               /* short version string */
          oflags |= SFLAG;
          break;
        case 'l':               /* long version string */
          oflags |= LFLAG;
          break;
        case 'x':               /* extended version information */
          oflags |= XFLAG;
          break;
        default:
          usage ();
          exit (2);
        }
    }

  argc -= optind;
  argv += optind;

  if (argc > 0)
    {
      usage ();
      exit (2);
    }

  /* default behavior */  
  if (oflags == 0)
    oflags = SFLAG;

  if (oflags & (RFLAG|VFLAG))
    {
      strcpy (dv, dist_version);
      rv = strchr (dv, '.');
      if (rv)
        *rv++ = '\0';
      else
        rv = "00";
    }
  if (oflags & RFLAG)
    printf ("%s\n", dv);
  else if (oflags & VFLAG)
    printf ("%s\n", rv);
  else if (oflags & MFLAG)
    printf ("%s\n", MACHTYPE);
  else if (oflags & PFLAG)
    printf ("%d\n", patch_level);
  else if (oflags & SFLAG)
    printf ("%s\n", shell_version_string ());
  else if (oflags & LFLAG)
    show_shell_version (0);
  else if (oflags & XFLAG)
    show_shell_version (1);

  exit (0);
}