source: branches/3.2/mindi-busybox/libbb/setup_environment.c @ 3232

Last change on this file since 3232 was 3232, checked in by bruno, 6 years ago
  • Update mindi-busybox to 1.21.1
File size: 2.8 KB
Line 
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
33void 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}
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