1/* 2 * Copyright (c) 2015-2016 Dmitry V. Levin <ldv@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 <stdio.h> 29#include <stdint.h> 30#include <stdlib.h> 31#include <unistd.h> 32#include "flock.h" 33 34#define FILE_LEN 4096 35#define EINVAL_STR "-1 EINVAL (Invalid argument)" 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 45static long 46invoke_test_syscall(const unsigned int cmd, void *const p) 47{ 48 const unsigned long op = (unsigned long) 0xffffffff00000000ULL | cmd; 49 50 return syscall(TEST_SYSCALL_NR, 0, op, (unsigned long) p); 51} 52 53static void 54test_flock_einval(const int cmd, const char *name) 55{ 56 struct_kernel_flock fl = { 57 .l_type = F_RDLCK, 58 .l_start = (TYPEOF_FLOCK_OFF_T) 0xdefaced1facefeedULL, 59 .l_len = (TYPEOF_FLOCK_OFF_T) 0xdefaced2cafef00dULL 60 }; 61 invoke_test_syscall(cmd, &fl); 62 printf("%s(0, %s, {l_type=F_RDLCK, l_whence=SEEK_SET" 63 ", l_start=%jd, l_len=%jd}) = %s\n", TEST_SYSCALL_STR, name, 64 (intmax_t) fl.l_start, (intmax_t) fl.l_len, EINVAL_STR); 65} 66 67static void 68test_flock(void) 69{ 70 TEST_FLOCK_EINVAL(F_SETLK); 71 TEST_FLOCK_EINVAL(F_SETLKW); 72 73 struct_kernel_flock fl = { 74 .l_type = F_RDLCK, 75 .l_len = FILE_LEN 76 }; 77 long rc = invoke_test_syscall(F_SETLK, &fl); 78 printf("%s(0, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET" 79 ", l_start=0, l_len=%d}) = %s\n", 80 TEST_SYSCALL_STR, FILE_LEN, rc ? EINVAL_STR : "0"); 81 if (rc) 82 return; 83 84 invoke_test_syscall(F_GETLK, &fl); 85 printf("%s(0, F_GETLK, {l_type=F_UNLCK, l_whence=SEEK_SET" 86 ", l_start=0, l_len=%d, l_pid=0}) = 0\n", 87 TEST_SYSCALL_STR, FILE_LEN); 88 89 invoke_test_syscall(F_SETLK, &fl); 90 printf("%s(0, F_SETLK, {l_type=F_UNLCK, l_whence=SEEK_SET" 91 ", l_start=0, l_len=%d}) = 0\n", 92 TEST_SYSCALL_STR, FILE_LEN); 93} 94 95static void 96create_sample(void) 97{ 98 char fname[] = TEST_SYSCALL_STR "_XXXXXX"; 99 100 (void) close(0); 101 if (mkstemp(fname)) 102 perror_msg_and_fail("mkstemp: %s", fname); 103 if (unlink(fname)) 104 perror_msg_and_fail("unlink: %s", fname); 105 if (ftruncate(0, FILE_LEN)) 106 perror_msg_and_fail("ftruncate"); 107} 108