1/* 2 * Copyright (c) 2015 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 <errno.h> 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#define EINVAL_STR "-1 EINVAL (Invalid argument)" 37 38# define TEST_SYSCALL_STR stringify(TEST_SYSCALL_NAME) 39# define stringify(arg) stringify_(arg) 40# define stringify_(arg) #arg 41 42#define TEST_SYSCALL_NR nrify(TEST_SYSCALL_NAME) 43#define nrify(arg) nrify_(arg) 44#define nrify_(arg) __NR_ ## arg 45 46#define TEST_FLOCK_EINVAL(cmd) test_flock_einval(cmd, #cmd) 47 48static void 49test_flock_einval(const int cmd, const char *name) 50{ 51 struct_kernel_flock fl = { 52 .l_type = F_RDLCK, 53 .l_start = (off_t) 0xdefaced1facefeed, 54 .l_len = (off_t) 0xdefaced2cafef00d 55 }; 56 syscall(TEST_SYSCALL_NR, 0, cmd, &fl); 57 printf("%s(0, %s, {l_type=F_RDLCK, l_whence=SEEK_SET" 58 ", l_start=%jd, l_len=%jd}) = %s\n", TEST_SYSCALL_STR, name, 59 (intmax_t) fl.l_start, (intmax_t) fl.l_len, EINVAL_STR); 60} 61 62static void 63test_flock(void) 64{ 65 TEST_FLOCK_EINVAL(F_SETLK); 66 TEST_FLOCK_EINVAL(F_SETLKW); 67 68 struct_kernel_flock fl = { 69 .l_type = F_RDLCK, 70 .l_len = FILE_LEN 71 }; 72 int rc = syscall(TEST_SYSCALL_NR, 0, F_SETLK, &fl); 73 printf("%s(0, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET" 74 ", l_start=0, l_len=%d}) = %s\n", 75 TEST_SYSCALL_STR, FILE_LEN, rc ? EINVAL_STR : "0"); 76 if (rc) 77 return; 78 79 syscall(TEST_SYSCALL_NR, 0, F_GETLK, &fl); 80 printf("%s(0, F_GETLK, {l_type=F_UNLCK, l_whence=SEEK_SET" 81 ", l_start=0, l_len=%d, l_pid=0}) = 0\n", 82 TEST_SYSCALL_STR, FILE_LEN); 83 84 syscall(TEST_SYSCALL_NR, 0, F_SETLK, &fl); 85 printf("%s(0, F_SETLK, {l_type=F_UNLCK, l_whence=SEEK_SET" 86 ", l_start=0, l_len=%d}) = 0\n", 87 TEST_SYSCALL_STR, FILE_LEN); 88} 89 90static int 91create_sample(void) 92{ 93 char fname[] = TEST_SYSCALL_STR "_XXXXXX"; 94 95 (void) close(0); 96 return mkstemp(fname) || unlink(fname) || ftruncate(0, FILE_LEN) ? 77 : 0; 97} 98