1 /* 2 * Check decoding of fchownat syscall. 3 * 4 * Copyright (c) 2016 Dmitry V. Levin <ldv (at) altlinux.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include "tests.h" 31 #include <asm/unistd.h> 32 #include <fcntl.h> 33 34 #if defined __NR_fchownat && defined AT_FDCWD && defined AT_SYMLINK_NOFOLLOW 35 36 # include <stdio.h> 37 # include <unistd.h> 38 39 int 40 main(void) 41 { 42 static const char sample[] = "fchownat_sample"; 43 uid_t uid = geteuid(); 44 uid_t gid = getegid(); 45 46 if (open(sample, O_RDONLY | O_CREAT, 0400) == -1) 47 perror_msg_and_fail("open"); 48 49 long rc = syscall(__NR_fchownat, AT_FDCWD, sample, uid, gid, 0); 50 printf("fchownat(AT_FDCWD, \"%s\", %d, %d, 0) = %s\n", 51 sample, uid, gid, sprintrc(rc)); 52 53 if (unlink(sample)) 54 perror_msg_and_fail("unlink"); 55 56 rc = syscall(__NR_fchownat, AT_FDCWD, 57 sample, -1, -1L, AT_SYMLINK_NOFOLLOW); 58 printf("fchownat(AT_FDCWD, \"%s\", -1, -1, AT_SYMLINK_NOFOLLOW) = %s\n", 59 sample, sprintrc(rc)); 60 61 puts("+++ exited with 0 +++"); 62 return 0; 63 } 64 65 #else 66 67 SKIP_MAIN_UNDEFINED("__NR_fchownat && AT_FDCWD && AT_SYMLINK_NOFOLLOW") 68 69 #endif 70
