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d166f048 JA |
1 | /* printenv -- minimal clone of BSD printenv(1). |
2 | ||
3 | usage: printenv [varname] | |
4 | ||
5 | Chet Ramey | |
6 | chet@po.cwru.edu | |
7 | */ | |
8 | ||
7117c2d2 JA |
9 | /* Copyright (C) 1997-2002 Free Software Foundation, Inc. |
10 | ||
11 | This file is part of GNU Bash, the Bourne Again SHell. | |
12 | ||
3185942a JA |
13 | Bash is free software: you can redistribute it and/or modify |
14 | it under the terms of the GNU General Public License as published by | |
15 | the Free Software Foundation, either version 3 of the License, or | |
16 | (at your option) any later version. | |
7117c2d2 | 17 | |
3185942a JA |
18 | Bash is distributed in the hope that it will be useful, |
19 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | GNU General Public License for more details. | |
7117c2d2 | 22 | |
3185942a JA |
23 | You should have received a copy of the GNU General Public License |
24 | along with Bash. If not, see <http://www.gnu.org/licenses/>. | |
25 | */ | |
7117c2d2 | 26 | |
95732b49 JA |
27 | #if defined (HAVE_CONFIG_H) |
28 | # include <config.h> | |
29 | #endif | |
30 | ||
31 | #include "bashansi.h" | |
ac50fbac | 32 | #include <stdio.h> /* puts */ |
95732b49 | 33 | |
d166f048 JA |
34 | extern char **environ; |
35 | ||
36 | int | |
37 | main (argc, argv) | |
38 | int argc; | |
39 | char **argv; | |
40 | { | |
41 | register char **envp, *eval; | |
42 | int len; | |
43 | ||
44 | argv++; | |
45 | argc--; | |
46 | ||
47 | /* printenv */ | |
48 | if (argc == 0) | |
49 | { | |
50 | for (envp = environ; *envp; envp++) | |
51 | puts (*envp); | |
52 | exit (0); | |
53 | } | |
54 | ||
55 | /* printenv varname */ | |
56 | len = strlen (*argv); | |
57 | for (envp = environ; *envp; envp++) | |
58 | { | |
59 | if (**argv == **envp && strncmp (*envp, *argv, len) == 0) | |
60 | { | |
61 | eval = *envp + len; | |
62 | /* If the environment variable doesn't have an `=', ignore it. */ | |
63 | if (*eval == '=') | |
64 | { | |
65 | puts (eval + 1); | |
66 | exit (0); | |
67 | } | |
68 | } | |
69 | } | |
70 | exit (1); | |
71 | } | |
72 |