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/* vi: set sw=4 ts=4: */
/*
* Copyright 1989 - 1991, Julianne Frances Haugh <jockgrrl@austin.rr.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Julianne F. Haugh nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <syslog.h>
#include <ctype.h>
#include "libbb.h"
#define DEFAULT_LOGIN_PATH "/bin:/usr/bin"
#define DEFAULT_ROOT_LOGIN_PATH "/usr/sbin:/bin:/usr/bin:/sbin"
void setup_environment(const char *shell, int loginshell, int changeenv, const struct passwd *pw)
{
if (loginshell) {
const char *term;
/* Change the current working directory to be the home directory
* of the user. It is a fatal error for this process to be unable
* to change to that directory. There is no "default" home
* directory.
* Some systems default to HOME=/
*/
if (chdir(pw->pw_dir)) {
xchdir("/");
fputs("warning: cannot change to home directory\n", stderr);
}
/* Leave TERM unchanged. Set HOME, SHELL, USER, LOGNAME, PATH.
Unset all other environment variables. */
term = getenv("TERM");
clearenv();
if (term)
xsetenv("TERM", term);
xsetenv("HOME", pw->pw_dir);
xsetenv("SHELL", shell);
xsetenv("USER", pw->pw_name);
xsetenv("LOGNAME", pw->pw_name);
xsetenv("PATH", (pw->pw_uid ? DEFAULT_LOGIN_PATH : DEFAULT_ROOT_LOGIN_PATH));
}
else if (changeenv) {
/* Set HOME, SHELL, and if not becoming a super-user,
USER and LOGNAME. */
xsetenv("HOME", pw->pw_dir);
xsetenv("SHELL", shell);
if (pw->pw_uid) {
xsetenv("USER", pw->pw_name);
xsetenv("LOGNAME", pw->pw_name);
}
}
}
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