[821] | 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 <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 | static void xsetenv ( const char *key, const char *value )
|
---|
| 46 | {
|
---|
| 47 | if ( setenv ( key, value, 1 ))
|
---|
| 48 | bb_error_msg_and_die (bb_msg_memory_exhausted);
|
---|
| 49 | }
|
---|
| 50 |
|
---|
| 51 | void setup_environment ( const char *shell, int loginshell, int changeenv, const struct passwd *pw )
|
---|
| 52 | {
|
---|
| 53 | if ( loginshell ) {
|
---|
| 54 | const char *term;
|
---|
| 55 |
|
---|
| 56 | /* Change the current working directory to be the home directory
|
---|
| 57 | * of the user. It is a fatal error for this process to be unable
|
---|
| 58 | * to change to that directory. There is no "default" home
|
---|
| 59 | * directory.
|
---|
| 60 | * Some systems default to HOME=/
|
---|
| 61 | */
|
---|
| 62 | if ( chdir ( pw-> pw_dir )) {
|
---|
| 63 | if ( chdir ( "/" )) {
|
---|
| 64 | syslog ( LOG_WARNING, "unable to cd to %s' for user %s'\n", pw-> pw_dir, pw-> pw_name );
|
---|
| 65 | bb_error_msg_and_die ( "cannot cd to home directory or /" );
|
---|
| 66 | }
|
---|
| 67 | fputs ( "warning: cannot change to home directory\n", stderr );
|
---|
| 68 | }
|
---|
| 69 |
|
---|
| 70 | /* Leave TERM unchanged. Set HOME, SHELL, USER, LOGNAME, PATH.
|
---|
| 71 | Unset all other environment variables. */
|
---|
| 72 | term = getenv ("TERM");
|
---|
| 73 | clearenv ( );
|
---|
| 74 | if ( term )
|
---|
| 75 | xsetenv ( "TERM", term );
|
---|
| 76 | xsetenv ( "HOME", pw-> pw_dir );
|
---|
| 77 | xsetenv ( "SHELL", shell );
|
---|
| 78 | xsetenv ( "USER", pw-> pw_name );
|
---|
| 79 | xsetenv ( "LOGNAME", pw-> pw_name );
|
---|
| 80 | xsetenv ( "PATH", ( pw-> pw_uid ? DEFAULT_LOGIN_PATH : DEFAULT_ROOT_LOGIN_PATH ));
|
---|
| 81 | }
|
---|
| 82 | else if ( changeenv ) {
|
---|
| 83 | /* Set HOME, SHELL, and if not becoming a super-user,
|
---|
| 84 | USER and LOGNAME. */
|
---|
| 85 | xsetenv ( "HOME", pw-> pw_dir );
|
---|
| 86 | xsetenv ( "SHELL", shell );
|
---|
| 87 | if ( pw-> pw_uid ) {
|
---|
| 88 | xsetenv ( "USER", pw-> pw_name );
|
---|
| 89 | xsetenv ( "LOGNAME", pw-> pw_name );
|
---|
| 90 | }
|
---|
| 91 | }
|
---|
| 92 | }
|
---|
| 93 |
|
---|