1 /* 2 * Check printing of character/block device numbers in -yy mode. 3 * 4 * Copyright (c) 2018 The strace developers. 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 32 #include <stdio.h> 33 #include <unistd.h> 34 35 #include <asm/unistd.h> 36 37 #include <linux/fcntl.h> 38 39 #include <sys/sysmacros.h> 40 41 #if defined __NR_openat && defined O_PATH 42 43 int 44 main(void) 45 { 46 static const struct { 47 const char *path; 48 unsigned int major; 49 unsigned int minor; 50 bool blk; 51 bool optional; 52 } checks[] = { 53 { "/dev/zero", 1, 5, false, false }, 54 { "/dev/full", 1, 7, false, false }, 55 { "/dev/sda", 8, 0, true, true }, 56 }; 57 58 for (unsigned int i = 0; i < ARRAY_SIZE(checks); i++) { 59 /* 60 * We can't have nice things here and call openat() directly as 61 * some libcs (yes, musl, I'm looking at you now) are too 62 * frivolous in passing flags to the kernel. 63 */ 64 long fd = syscall(__NR_openat, AT_FDCWD, checks[i].path, 65 O_RDONLY|O_PATH); 66 67 printf("openat(AT_FDCWD, \"%s\", O_RDONLY|O_PATH) = %s", 68 checks[i].path, sprintrc(fd)); 69 if (fd >= 0) 70 printf("<%s<%s %u:%u>>", 71 checks[i].path, 72 checks[i].blk ? "block" : "char", 73 checks[i].major, checks[i].minor); 74 puts(""); 75 76 if (fd < 0) { 77 if (checks[i].optional) 78 continue; 79 else 80 perror_msg_and_fail("openat(\"%s\")", 81 checks[i].path); 82 } 83 84 int rc = fsync(fd); 85 86 printf("fsync(%ld<%s<%s %u:%u>>) = %s\n", 87 fd, checks[i].path, checks[i].blk ? "block" : "char", 88 checks[i].major, checks[i].minor, sprintrc(rc)); 89 90 close(fd); 91 } 92 93 puts("+++ exited with 0 +++"); 94 return 0; 95 } 96 97 #else 98 99 SKIP_MAIN_UNDEFINED("__NR_openat && O_PATH") 100 101 #endif 102
