Home | History | Annotate | Download | only in tests-mx32
      1 /*
      2  * Copyright (c) 2016 Dmitry V. Levin <ldv (at) altlinux.org>
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. The name of the author may not be used to endorse or promote products
     14  *    derived from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include "tests.h"
     29 #include <asm/unistd.h>
     30 #ifdef HAVE_PRCTL
     31 # include <sys/prctl.h>
     32 #endif
     33 
     34 #if defined HAVE_PRCTL && defined PR_SET_SECCOMP && defined __NR_exit
     35 
     36 # include <stdio.h>
     37 # include <unistd.h>
     38 
     39 int
     40 main(void)
     41 {
     42 	static const char text1[] =
     43 		"prctl(PR_SET_SECCOMP, SECCOMP_MODE_STRICT) = 0\n";
     44 	static const char text2[] = "+++ exited with 0 +++\n";
     45 
     46 	int rc = prctl(PR_SET_SECCOMP, -1L, 1, 2, 3);
     47 	printf("prctl(PR_SET_SECCOMP, %#lx /* SECCOMP_MODE_??? */, 0x1, 0x2, 0x3)"
     48 	       " = %d %s (%m)\n", -1L, rc, errno2name());
     49 	fflush(stdout);
     50 
     51 	rc = prctl(PR_SET_SECCOMP, 1);
     52 	if (rc) {
     53 		printf("prctl(PR_SET_SECCOMP, SECCOMP_MODE_STRICT)"
     54 		       " = %d %s (%m)\n", rc, errno2name());
     55 		fflush(stdout);
     56 		rc = 0;
     57 	} else {
     58 		/*
     59 		 * If kernel implementaton of SECCOMP_MODE_STRICT is buggy,
     60 		 * the following syscall will result to SIGKILL.
     61 		 */
     62 		rc = write(1, text1, LENGTH_OF(text1)) != LENGTH_OF(text1);
     63 	}
     64 
     65 	rc += write(1, text2, LENGTH_OF(text2)) != LENGTH_OF(text2);
     66 	return !!syscall(__NR_exit, rc);
     67 }
     68 
     69 #else
     70 
     71 SKIP_MAIN_UNDEFINED("HAVE_PRCTL && PR_SET_SECCOMP && __NR_exit")
     72 
     73 #endif
     74