1 /* 2 * Check decoding of umode_t type syscall arguments. 3 * 4 * Copyright (c) 2016 Dmitry V. Levin <ldv (at) altlinux.org> 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 <stdio.h> 31 #include <unistd.h> 32 #include <sys/stat.h> 33 34 #ifndef TEST_SYSCALL_PREFIX_ARGS 35 # define TEST_SYSCALL_PREFIX_ARGS 36 #endif 37 #ifndef TEST_SYSCALL_PREFIX_STR 38 # define TEST_SYSCALL_PREFIX_STR "" 39 #endif 40 41 static const char sample[] = TEST_SYSCALL_STR; 42 43 static void 44 test_syscall(unsigned short mode) 45 { 46 unsigned long lmode = (unsigned long) 0xffffffffffff0000ULL | mode; 47 long rc = syscall(TEST_SYSCALL_NR, TEST_SYSCALL_PREFIX_ARGS 48 sample, lmode); 49 50 if (mode <= 07) 51 printf("%s(%s\"%s\", 00%d) = %ld %s (%m)\n", 52 sample, TEST_SYSCALL_PREFIX_STR, 53 sample, (int) mode, rc, errno2name()); 54 else 55 printf("%s(%s\"%s\", %#03ho) = %ld %s (%m)\n", 56 sample, TEST_SYSCALL_PREFIX_STR, 57 sample, mode, rc, errno2name()); 58 } 59 60 int 61 main(void) 62 { 63 test_syscall(0); 64 test_syscall(0xffff); 65 test_syscall(06); 66 test_syscall(060); 67 test_syscall(0600); 68 test_syscall(024); 69 test_syscall(S_IFREG); 70 test_syscall(S_IFDIR | 06); 71 test_syscall(S_IFLNK | 060); 72 test_syscall(S_IFIFO | 0600); 73 test_syscall(S_IFCHR | 024); 74 test_syscall((0xffff & ~S_IFMT) | S_IFBLK); 75 76 puts("+++ exited with 0 +++"); 77 return 0; 78 } 79
