diff options
Diffstat (limited to 'libbb/setup_environment.c')
| -rw-r--r-- | libbb/setup_environment.c | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/libbb/setup_environment.c b/libbb/setup_environment.c new file mode 100644 index 0000000..78318ce --- /dev/null +++ b/libbb/setup_environment.c @@ -0,0 +1,70 @@ +/* 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 "libbb.h" + +void FAST_FUNC setup_environment(const char *shell, int clear_env, int change_env, const struct passwd *pw) +{ + /* Change the current working directory to be the home directory + * of the user */ + if (chdir(pw->pw_dir)) { + xchdir("/"); + bb_error_msg("can't chdir to home directory '%s'", pw->pw_dir); + } + + if (clear_env) { + const char *term; + + /* Leave TERM unchanged. Set HOME, SHELL, USER, LOGNAME, PATH. + Unset all other environment variables. */ + term = getenv("TERM"); + clearenv(); + if (term) + xsetenv("TERM", term); + xsetenv("PATH", (pw->pw_uid ? bb_default_path : bb_default_root_path)); + goto shortcut; + // No, gcc (4.2.1) is not clever enougn to do it itself. + //xsetenv("USER", pw->pw_name); + //xsetenv("LOGNAME", pw->pw_name); + //xsetenv("HOME", pw->pw_dir); + //xsetenv("SHELL", shell); + } + else if (change_env) { + /* Set HOME, SHELL, and if not becoming a super-user, + USER and LOGNAME. */ + if (pw->pw_uid) { + shortcut: + xsetenv("USER", pw->pw_name); + xsetenv("LOGNAME", pw->pw_name); + } + xsetenv("HOME", pw->pw_dir); + xsetenv("SHELL", shell); + } +} |