Annotation of /trunk/mkinitrd-magellan/busybox/libbb/setup_environment.c
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Sat Sep 1 22:45:15 2007 UTC (16 years, 9 months ago) by niro
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Sat Sep 1 22:45:15 2007 UTC (16 years, 9 months ago) by niro
File MIME type: text/plain
File size: 3078 byte(s)
-import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
1 | niro | 532 | /* 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 <stdio.h> | ||
32 | #include <errno.h> | ||
33 | #include <unistd.h> | ||
34 | #include <string.h> | ||
35 | #include <stdlib.h> | ||
36 | #include <syslog.h> | ||
37 | #include <ctype.h> | ||
38 | #include "libbb.h" | ||
39 | |||
40 | |||
41 | |||
42 | #define DEFAULT_LOGIN_PATH "/bin:/usr/bin" | ||
43 | #define DEFAULT_ROOT_LOGIN_PATH "/usr/sbin:/bin:/usr/bin:/sbin" | ||
44 | |||
45 | void setup_environment(const char *shell, int loginshell, int changeenv, const struct passwd *pw) | ||
46 | { | ||
47 | if (loginshell) { | ||
48 | const char *term; | ||
49 | |||
50 | /* Change the current working directory to be the home directory | ||
51 | * of the user. It is a fatal error for this process to be unable | ||
52 | * to change to that directory. There is no "default" home | ||
53 | * directory. | ||
54 | * Some systems default to HOME=/ | ||
55 | */ | ||
56 | if (chdir(pw->pw_dir)) { | ||
57 | xchdir("/"); | ||
58 | fputs("warning: cannot change to home directory\n", stderr); | ||
59 | } | ||
60 | |||
61 | /* Leave TERM unchanged. Set HOME, SHELL, USER, LOGNAME, PATH. | ||
62 | Unset all other environment variables. */ | ||
63 | term = getenv("TERM"); | ||
64 | clearenv(); | ||
65 | if (term) | ||
66 | xsetenv("TERM", term); | ||
67 | xsetenv("HOME", pw->pw_dir); | ||
68 | xsetenv("SHELL", shell); | ||
69 | xsetenv("USER", pw->pw_name); | ||
70 | xsetenv("LOGNAME", pw->pw_name); | ||
71 | xsetenv("PATH", (pw->pw_uid ? DEFAULT_LOGIN_PATH : DEFAULT_ROOT_LOGIN_PATH)); | ||
72 | } | ||
73 | else if (changeenv) { | ||
74 | /* Set HOME, SHELL, and if not becoming a super-user, | ||
75 | USER and LOGNAME. */ | ||
76 | xsetenv("HOME", pw->pw_dir); | ||
77 | xsetenv("SHELL", shell); | ||
78 | if (pw->pw_uid) { | ||
79 | xsetenv("USER", pw->pw_name); | ||
80 | xsetenv("LOGNAME", pw->pw_name); | ||
81 | } | ||
82 | } | ||
83 | } |