1 /* 2 * Copyright (c) 2015 Gleb Fotengauer-Malinovskiy <glebfm@altlinux.org> 3 * Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org> 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 "tests.h" 30 #include <asm/unistd.h> 31 32 #ifdef __NR_readlinkat 33 34 # include <stdio.h> 35 # include <unistd.h> 36 37 # define PREFIX "test.readlinkat" 38 # define TARGET (PREFIX ".target") 39 # define LINKPATH (PREFIX ".link") 40 41 int 42 main(void) 43 { 44 const char * const fname = tail_memdup(LINKPATH, sizeof(LINKPATH)); 45 const char * const hex_fname = 46 hexquote_strndup(fname, sizeof(LINKPATH) - 1); 47 48 const unsigned int size = sizeof(TARGET) - 1; 49 char * const buf = tail_alloc(size); 50 51 (void) unlink(fname); 52 53 long rc = syscall(__NR_readlinkat, -100, fname, buf, size); 54 printf("readlinkat(AT_FDCWD, \"%s\", %p, %u) = -1 ENOENT (%m)\n", 55 hex_fname, buf, size); 56 57 if (symlink(TARGET, fname)) 58 perror_msg_and_fail("symlink"); 59 60 rc = syscall(__NR_readlinkat, -100, fname, buf, size); 61 if (rc < 0) { 62 perror("readlinkat"); 63 (void) unlink(fname); 64 return 77; 65 } 66 const char * const hex_buf = hexquote_strndup(buf, size); 67 printf("readlinkat(AT_FDCWD, \"%s\", \"%s\", %u) = %u\n", 68 hex_fname, hex_buf, size, size); 69 70 if (unlink(fname)) 71 perror_msg_and_fail("unlink"); 72 73 puts("+++ exited with 0 +++"); 74 return 0; 75 } 76 77 #else 78 79 SKIP_MAIN_UNDEFINED("__NR_readlink") 80 81 #endif 82