1 /* 2 * Copyright (c) 2015-2016 Dmitry V. Levin <ldv (at) altlinux.org> 3 * Copyright (c) 2015-2017 The strace developers. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <stdio.h> 30 #include <stdint.h> 31 #include <stdlib.h> 32 #include <unistd.h> 33 #include "flock.h" 34 35 #define FILE_LEN 4096 36 37 #define TEST_FLOCK_EINVAL(cmd) test_flock_einval(cmd, #cmd) 38 39 #ifdef HAVE_TYPEOF 40 # define TYPEOF_FLOCK_OFF_T typeof(((struct_kernel_flock *) NULL)->l_len) 41 #else 42 # define TYPEOF_FLOCK_OFF_T off_t 43 #endif 44 45 static long 46 invoke_test_syscall(const unsigned int cmd, void *const p) 47 { 48 const kernel_ulong_t fd = F8ILL_KULONG_MASK; 49 const kernel_ulong_t op = F8ILL_KULONG_MASK | cmd; 50 51 return syscall(TEST_SYSCALL_NR, fd, op, (unsigned long) p); 52 } 53 54 static void 55 test_flock_einval(const int cmd, const char *name) 56 { 57 struct_kernel_flock fl = { 58 .l_type = F_RDLCK, 59 .l_start = (TYPEOF_FLOCK_OFF_T) 0xdefaced1facefeedULL, 60 .l_len = (TYPEOF_FLOCK_OFF_T) 0xdefaced2cafef00dULL 61 }; 62 long rc = invoke_test_syscall(cmd, &fl); 63 printf("%s(0, %s, {l_type=F_RDLCK, l_whence=SEEK_SET" 64 ", l_start=%jd, l_len=%jd}) = %s\n", TEST_SYSCALL_STR, name, 65 (intmax_t) fl.l_start, (intmax_t) fl.l_len, sprintrc(rc)); 66 } 67 68 static void 69 test_flock(void) 70 { 71 TEST_FLOCK_EINVAL(F_SETLK); 72 TEST_FLOCK_EINVAL(F_SETLKW); 73 74 struct_kernel_flock fl = { 75 .l_type = F_RDLCK, 76 .l_len = FILE_LEN 77 }; 78 long rc = invoke_test_syscall(F_SETLK, &fl); 79 printf("%s(0, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET" 80 ", l_start=0, l_len=%d}) = %s\n", 81 TEST_SYSCALL_STR, FILE_LEN, sprintrc(rc)); 82 if (rc) 83 return; 84 85 invoke_test_syscall(F_GETLK, &fl); 86 printf("%s(0, F_GETLK, {l_type=F_UNLCK, l_whence=SEEK_SET" 87 ", l_start=0, l_len=%d, l_pid=0}) = 0\n", 88 TEST_SYSCALL_STR, FILE_LEN); 89 90 invoke_test_syscall(F_SETLK, &fl); 91 printf("%s(0, F_SETLK, {l_type=F_UNLCK, l_whence=SEEK_SET" 92 ", l_start=0, l_len=%d}) = 0\n", 93 TEST_SYSCALL_STR, FILE_LEN); 94 } 95 96 static void 97 create_sample(void) 98 { 99 char fname[] = TEST_SYSCALL_STR "_XXXXXX"; 100 101 (void) close(0); 102 if (mkstemp(fname)) 103 perror_msg_and_fail("mkstemp: %s", fname); 104 if (unlink(fname)) 105 perror_msg_and_fail("unlink: %s", fname); 106 if (ftruncate(0, FILE_LEN)) 107 perror_msg_and_fail("ftruncate"); 108 } 109
