f4f6e5144b
function old new delta exec_login_shell - 12 +12 sulogin_main 247 240 -7 login_main 960 953 -7 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 0/2 up/down: 12/-14) Total: -2 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
103 lines
3.3 KiB
C
103 lines
3.3 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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#if ENABLE_SELINUX
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#include <selinux/selinux.h> /* for setexeccon */
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#endif
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#if ENABLE_SELINUX
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static security_context_t current_sid;
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void FAST_FUNC renew_current_security_context(void)
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{
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freecon(current_sid); /* Release old context */
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getcon(¤t_sid); /* update */
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}
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void FAST_FUNC set_current_security_context(security_context_t sid)
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{
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freecon(current_sid); /* Release old context */
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current_sid = sid;
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}
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#endif
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/* Exec SHELL, or DEFAULT_SHELL if SHELL is "" or NULL.
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* If ADDITIONAL_ARGS is not NULL, pass them to the shell.
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*/
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void FAST_FUNC exec_shell(const char *shell, int loginshell, const char **additional_args)
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{
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const char **args;
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args = additional_args;
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while (args && *args)
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args++;
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args = xzalloc(sizeof(args[0]) * (2 + (args - additional_args)));
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if (!shell || !shell[0])
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shell = DEFAULT_SHELL;
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args[0] = bb_get_last_path_component_nostrip(shell);
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if (loginshell)
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args[0] = xasprintf("-%s", args[0]);
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/*args[1] = NULL; - already is */
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if (additional_args) {
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int cnt = 0;
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while (*additional_args)
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args[++cnt] = *additional_args++;
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}
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#if ENABLE_SELINUX
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if (current_sid)
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setexeccon(current_sid);
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if (ENABLE_FEATURE_CLEAN_UP)
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freecon(current_sid);
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#endif
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execv(shell, (char **) args);
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bb_perror_msg_and_die("can't execute '%s'", shell);
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}
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void FAST_FUNC exec_login_shell(const char *shell)
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{
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exec_shell(shell, 1, NULL);
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}
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/* Typical idiom for applets which exec *optional* PROG [ARGS] */
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void FAST_FUNC exec_prog_or_SHELL(char **argv)
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{
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if (argv[0]) {
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BB_EXECVP_or_die(argv);
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}
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/* Both users (nsenter and unshare) do indeed exec
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* a _login_ shell (with dash in argv[0])!
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*/
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exec_login_shell(getenv("SHELL"));
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}
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