mirror of
https://github.com/sheumann/hush.git
synced 2024-08-28 09:28:56 +00:00
94 lines
3.4 KiB
C
94 lines
3.4 KiB
C
/* 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"
|
|
|
|
static void xsetenv ( const char *key, const char *value )
|
|
{
|
|
if ( setenv ( key, value, 1 ))
|
|
bb_error_msg_and_die (bb_msg_memory_exhausted);
|
|
}
|
|
|
|
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 )) {
|
|
if ( chdir ( "/" )) {
|
|
syslog ( LOG_WARNING, "unable to cd to %s' for user %s'\n", pw-> pw_dir, pw-> pw_name );
|
|
bb_error_msg_and_die ( "cannot cd to home directory or /" );
|
|
}
|
|
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 );
|
|
}
|
|
}
|
|
}
|
|
|