1/* printenv -- minimal clone of BSD printenv(1).
2
3   usage: printenv [varname]
4
5   Chet Ramey
6   chet@po.cwru.edu
7*/
8
9/* Copyright (C) 1997-2002 Free Software Foundation, Inc.
10
11   This file is part of GNU Bash, the Bourne Again SHell.
12
13   Bash is free software; you can redistribute it and/or modify it under
14   the terms of the GNU General Public License as published by the Free
15   Software Foundation; either version 2, or (at your option) any later
16   version.
17
18   Bash is distributed in the hope that it will be useful, but WITHOUT ANY
19   WARRANTY; without even the implied warranty of MERCHANTABILITY or
20   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
21   for more details.
22
23   You should have received a copy of the GNU General Public License along
24   with Bash; see the file COPYING.  If not, write to the Free Software
25   Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
26
27#if defined (HAVE_CONFIG_H)
28#  include  <config.h>
29#endif
30
31#include "bashansi.h"
32
33extern char **environ;
34
35int
36main (argc, argv)
37     int argc;
38     char **argv;
39{
40  register char **envp, *eval;
41  int len;
42
43  argv++;
44  argc--;
45
46  /* printenv */
47  if (argc == 0)
48    {
49      for (envp = environ; *envp; envp++)
50	puts (*envp);
51      exit (0);
52    }
53
54  /* printenv varname */
55  len = strlen (*argv);
56  for (envp = environ; *envp; envp++)
57    {
58      if (**argv == **envp && strncmp (*envp, *argv, len) == 0)
59	{
60	  eval = *envp + len;
61	  /* If the environment variable doesn't have an `=', ignore it. */
62	  if (*eval == '=')
63	    {
64	      puts (eval + 1);
65	      exit (0);
66	    }
67	}
68    }
69  exit (1);
70}
71
72