/* 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 flags, const struct passwd *pw) { if (!shell || !shell[0]) shell = DEFAULT_SHELL; /* Change the current working directory to be the home directory * of the user */ if (!(flags & SETUP_ENV_NO_CHDIR)) { if (chdir(pw->pw_dir) != 0) { bb_error_msg("can't change directory to '%s'", pw->pw_dir); xchdir((flags & SETUP_ENV_TO_TMP) ? "/tmp" : "/"); } } if (flags & SETUP_ENV_CLEARENV) { 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 (flags & SETUP_ENV_CHANGEENV) { /* 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); } }