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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 <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <syslog.h>
#include <ctype.h>
#include "libbb.h"
#ifdef CONFIG_SELINUX
#include <selinux/selinux.h> /* for setexeccon */
#endif
#ifdef CONFIG_SELINUX
static security_context_t current_sid=NULL;
void
renew_current_security_context(void)
{
if (current_sid)
freecon(current_sid); /* Release old context */
getcon(¤t_sid); /* update */
return;
}
void
set_current_security_context(security_context_t sid)
{
if (current_sid)
freecon(current_sid); /* Release old context */
current_sid=sid;
return;
}
#endif
/* Run SHELL, or DEFAULT_SHELL if SHELL is empty.
If COMMAND is nonzero, pass it to the shell with the -c option.
If ADDITIONAL_ARGS is nonzero, pass it to the shell as more
arguments. */
void run_shell ( const char *shell, int loginshell, const char *command, const char **additional_args)
{
const char **args;
int argno = 1;
int additional_args_cnt = 0;
for ( args = additional_args; args && *args; args++ )
additional_args_cnt++;
args = (const char **) xmalloc (sizeof (char *) * ( 4 + additional_args_cnt ));
args [0] = bb_get_last_path_component ( bb_xstrdup ( shell ));
if ( loginshell )
args [0] = bb_xasprintf ("-%s", args [0]);
if ( command ) {
args [argno++] = "-c";
args [argno++] = command;
}
if ( additional_args ) {
for ( ; *additional_args; ++additional_args )
args [argno++] = *additional_args;
}
args [argno] = 0;
#ifdef CONFIG_SELINUX
if ( (current_sid) && (!setexeccon(current_sid)) ) {
freecon(current_sid);
execve(shell, (char **) args, environ);
} else
#endif
execv ( shell, (char **) args );
bb_perror_msg_and_die ( "cannot run %s", shell );
}
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