blob: 4258656fea2212bc61dc32d57747b9c48d41d40e
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Copyright 1989 - 1991, Julianne Frances Haugh <jockgrrl@austin.rr.com> |
4 | * All rights reserved. |
5 | * |
6 | * Redistribution and use in source and binary forms, with or without |
7 | * modification, are permitted provided that the following conditions |
8 | * are met: |
9 | * 1. Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * 2. Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
14 | * 3. Neither the name of Julianne F. Haugh nor the names of its contributors |
15 | * may be used to endorse or promote products derived from this software |
16 | * without specific prior written permission. |
17 | * |
18 | * THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND |
19 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
21 | * ARE DISCLAIMED. IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE |
22 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
23 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
24 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
25 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
26 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
27 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
28 | * SUCH DAMAGE. |
29 | */ |
30 | |
31 | #include "libbb.h" |
32 | |
33 | void FAST_FUNC setup_environment(const char *shell, int flags, const struct passwd *pw) |
34 | { |
35 | if (!shell || !shell[0]) |
36 | shell = DEFAULT_SHELL; |
37 | |
38 | /* Change the current working directory to be the home directory |
39 | * of the user */ |
40 | if (!(flags & SETUP_ENV_NO_CHDIR)) { |
41 | if (chdir(pw->pw_dir) != 0) { |
42 | bb_error_msg("can't change directory to '%s'", pw->pw_dir); |
43 | xchdir((flags & SETUP_ENV_TO_TMP) ? "/tmp" : "/"); |
44 | } |
45 | } |
46 | |
47 | if (flags & SETUP_ENV_CLEARENV) { |
48 | const char *term; |
49 | |
50 | /* Leave TERM unchanged. Set HOME, SHELL, USER, LOGNAME, PATH. |
51 | * Unset all other environment variables. */ |
52 | term = getenv("TERM"); |
53 | clearenv(); |
54 | if (term) |
55 | xsetenv("TERM", term); |
56 | xsetenv("PATH", (pw->pw_uid ? bb_default_path : bb_default_root_path)); |
57 | goto shortcut; |
58 | // No, gcc (4.2.1) is not clever enougn to do it itself. |
59 | //xsetenv("USER", pw->pw_name); |
60 | //xsetenv("LOGNAME", pw->pw_name); |
61 | //xsetenv("HOME", pw->pw_dir); |
62 | //xsetenv("SHELL", shell); |
63 | } else if (flags & SETUP_ENV_CHANGEENV) { |
64 | /* Set HOME, SHELL, and if not becoming a super-user, |
65 | * USER and LOGNAME. */ |
66 | if (pw->pw_uid) { |
67 | shortcut: |
68 | xsetenv("USER", pw->pw_name); |
69 | xsetenv("LOGNAME", pw->pw_name); |
70 | } |
71 | xsetenv("HOME", pw->pw_dir); |
72 | xsetenv("SHELL", shell); |
73 | } |
74 | } |
75 |