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111 lines
3.4 KiB
C
111 lines
3.4 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 <stdio.h>
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#include <errno.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <syslog.h>
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#include <ctype.h>
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#include "libbb.h"
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#ifdef CONFIG_SELINUX
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#include <selinux/selinux.h> /* for setexeccon */
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#endif
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#ifdef CONFIG_SELINUX
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static security_context_t current_sid=NULL;
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void
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renew_current_security_context(void)
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{
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if (current_sid)
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freecon(current_sid); /* Release old context */
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getcon(¤t_sid); /* update */
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return;
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}
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void
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set_current_security_context(security_context_t sid)
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{
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if (current_sid)
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freecon(current_sid); /* Release old context */
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current_sid=sid;
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return;
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}
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#endif
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/* Run SHELL, or DEFAULT_SHELL if SHELL is empty.
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If COMMAND is nonzero, pass it to the shell with the -c option.
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If ADDITIONAL_ARGS is nonzero, pass it to the shell as more
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arguments. */
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void run_shell ( const char *shell, int loginshell, const char *command, const char **additional_args)
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{
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const char **args;
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int argno = 1;
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int additional_args_cnt = 0;
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for ( args = additional_args; args && *args; args++ )
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additional_args_cnt++;
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args = (const char **) xmalloc (sizeof (char *) * ( 4 + additional_args_cnt ));
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args [0] = bb_get_last_path_component ( bb_xstrdup ( shell ));
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if ( loginshell ) {
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char *args0;
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bb_xasprintf ( &args0, "-%s", args [0] );
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args [0] = args0;
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}
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if ( command ) {
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args [argno++] = "-c";
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args [argno++] = command;
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}
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if ( additional_args ) {
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for ( ; *additional_args; ++additional_args )
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args [argno++] = *additional_args;
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}
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args [argno] = 0;
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#ifdef CONFIG_SELINUX
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if ( (current_sid) && (!setexeccon(current_sid)) ) {
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freecon(current_sid);
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execve(shell, (char **) args, environ);
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} else
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#endif
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execv ( shell, (char **) args );
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bb_perror_msg_and_die ( "cannot run %s", shell );
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}
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