90 lines
1.7 KiB
C
90 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2018 Linux Test Project
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* Copyright (c) 2015 Cyril Hrubis <chrubis@suse.cz>
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* Copyright (c) International Business Machines Corp., 2001
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*
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* Ported to LTP: Wayne Boyer
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* 21/04/2008 Renaud Lottiaux (Renaud.Lottiaux@kerlabs.com)
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*/
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/*
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* Attempt to execve(2) an executable owned by root with no execute permissions
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* for the other users, fails when execve(2) is used as a non-root user, the
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* errno should be EACCES.
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*/
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE
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#endif
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "tst_test.h"
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#define TEST_APP "execve_child"
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#define USER_NAME "nobody"
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static uid_t nobody_uid;
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static void do_child(void)
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{
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char *argv[2] = {TEST_APP, NULL};
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SAFE_SETEUID(nobody_uid);
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/* Use environ:
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* Inherit a copy of parent's environment
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* for tst_reinit() in execve_child.c
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*/
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TEST(execve(TEST_APP, argv, environ));
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if (!TST_RET)
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tst_brk(TFAIL, "execve() passed unexpectedly");
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if (TST_ERR != EACCES)
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tst_brk(TFAIL | TTERRNO, "execve() failed unexpectedly");
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tst_res(TPASS | TTERRNO, "execve() failed expectedly");
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exit(0);
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}
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static void verify_execve(void)
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{
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pid_t pid = SAFE_FORK();
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if (pid == 0)
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do_child();
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}
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static void setup(void)
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{
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struct passwd *pwd;
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SAFE_CHMOD(TEST_APP, 0700);
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pwd = SAFE_GETPWNAM(USER_NAME);
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nobody_uid = pwd->pw_uid;
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}
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static const char *const resource_files[] = {
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TEST_APP,
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NULL,
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};
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static struct tst_test test = {
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.needs_root = 1,
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.forks_child = 1,
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.child_needs_reinit = 1,
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.setup = setup,
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.resource_files = resource_files,
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.test_all = verify_execve,
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};
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