74 lines
2.8 KiB
C
74 lines
2.8 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Copyright 1989 - 1991, Julianne Frances Haugh <jockgrrl@austin.rr.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of Julianne F. Haugh nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ''AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "libbb.h"
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void FAST_FUNC setup_environment(const char *shell, int flags, const struct passwd *pw)
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{
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if (!shell || !shell[0])
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shell = DEFAULT_SHELL;
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/* Change the current working directory to be the home directory
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* of the user */
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if (!(flags & SETUP_ENV_NO_CHDIR)) {
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if (chdir(pw->pw_dir) != 0) {
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bb_error_msg("can't change directory to '%s'", pw->pw_dir);
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xchdir((flags & SETUP_ENV_TO_TMP) ? "/tmp" : "/");
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}
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}
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if (flags & SETUP_ENV_CLEARENV) {
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const char *term;
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/* Leave TERM unchanged. Set HOME, SHELL, USER, LOGNAME, PATH.
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* Unset all other environment variables. */
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term = getenv("TERM");
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clearenv();
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if (term)
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xsetenv("TERM", term);
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xsetenv("PATH", (pw->pw_uid ? bb_default_path : bb_default_root_path));
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goto shortcut;
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// No, gcc (4.2.1) is not clever enougn to do it itself.
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//xsetenv("USER", pw->pw_name);
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//xsetenv("LOGNAME", pw->pw_name);
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//xsetenv("HOME", pw->pw_dir);
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//xsetenv("SHELL", shell);
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} else if (flags & SETUP_ENV_CHANGEENV) {
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/* Set HOME, SHELL, and if not becoming a super-user,
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* USER and LOGNAME. */
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if (pw->pw_uid) {
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shortcut:
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xsetenv("USER", pw->pw_name);
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xsetenv("LOGNAME", pw->pw_name);
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}
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xsetenv("HOME", pw->pw_dir);
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xsetenv("SHELL", shell);
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}
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}
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