1 /* 2 * Check decoding of non-NUL-terminated strings when len == -1. 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 "tests.h" 31 32 #include <stdio.h> 33 #include <string.h> 34 #include <unistd.h> 35 #include <sys/uio.h> 36 37 #define DEFAULT_STRLEN 32 38 39 int 40 main(void) 41 { 42 char *const buf = tail_alloc(DEFAULT_STRLEN + 1); 43 const struct iovec io = { 44 .iov_base = buf, 45 .iov_len = -1 46 }; 47 int rc; 48 49 buf[0] = 0; 50 51 tprintf("%s", ""); 52 53 memset(buf + 1, 'X', DEFAULT_STRLEN); 54 buf[DEFAULT_STRLEN - 1] = 0; 55 56 rc = writev(-1, &io, 1); 57 tprintf("writev(-1, [{iov_base=\"\\0%*s\\0\"..., iov_len=%lu}], 1)" 58 " = %s\n", DEFAULT_STRLEN - 2, buf + 1, -1UL, sprintrc(rc)); 59 60 buf[DEFAULT_STRLEN - 1] = 'X'; 61 buf[DEFAULT_STRLEN] = 0; 62 63 rc = writev(-1, &io, 1); 64 tprintf("writev(-1, [{iov_base=\"\\0%*s\"..., iov_len=%lu}], 1)" 65 " = %s\n", DEFAULT_STRLEN - 1, buf + 1, -1UL, sprintrc(rc)); 66 67 tprintf("+++ exited with 0 +++\n"); 68 return 0; 69 } 70
