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/* 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);
}
}
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