1 /* vi: set sw=4 ts=4: */
3 * Copyright 1989 - 1991, Julianne Frances Haugh <jockgrrl@austin.rr.com>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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.
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
33 /* util-linux manpage says /sbin:/bin:/usr/sbin:/usr/bin,
34 * but I want to save a few bytes here */
35 static const char DEFAULT_ROOT_LOGIN_PATH[] = "/sbin:/usr/sbin:/bin:/usr/bin";
36 #define DEFAULT_LOGIN_PATH (DEFAULT_ROOT_LOGIN_PATH + sizeof("/sbin:/usr/sbin"))
38 void setup_environment(const char *shell, int loginshell, int changeenv, const struct passwd *pw)
43 /* Change the current working directory to be the home directory
44 * of the user. It is a fatal error for this process to be unable
45 * to change to that directory. There is no "default" home
47 * Some systems default to HOME=/
49 if (chdir(pw->pw_dir)) {
51 fputs("warning: cannot change to home directory\n", stderr);
54 /* Leave TERM unchanged. Set HOME, SHELL, USER, LOGNAME, PATH.
55 Unset all other environment variables. */
56 term = getenv("TERM");
59 xsetenv("TERM", term);
60 xsetenv("HOME", pw->pw_dir);
61 xsetenv("SHELL", shell);
62 xsetenv("USER", pw->pw_name);
63 xsetenv("LOGNAME", pw->pw_name);
64 xsetenv("PATH", (pw->pw_uid ? DEFAULT_LOGIN_PATH : DEFAULT_ROOT_LOGIN_PATH));
67 /* Set HOME, SHELL, and if not becoming a super-user,
69 xsetenv("HOME", pw->pw_dir);
70 xsetenv("SHELL", shell);
72 xsetenv("USER", pw->pw_name);
73 xsetenv("LOGNAME", pw->pw_name);