perror_test.c revision 137587
1/*- 2 * Copyright (c) 2002 Tim J. Robbins 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 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27/* 28 * Test program for perror() as specified by IEEE Std. 1003.1-2001 and 29 * ISO/IEC 9899:1999. 30 */ 31 32#include <sys/cdefs.h> 33__FBSDID("$FreeBSD: head/tools/regression/lib/libc/stdio/test-perror.c 137587 2004-11-11 19:47:55Z nik $"); 34 35#include <assert.h> 36#include <err.h> 37#include <errno.h> 38#include <limits.h> 39#include <paths.h> 40#include <stdio.h> 41#include <stdlib.h> 42#include <string.h> 43 44static void cleanup(void); 45static char tmpfil[PATH_MAX]; 46 47int 48main(int argc, char *argv[]) 49{ 50 char lbuf[512]; 51 int i; 52 char *s; 53 54 printf("1..1\n"); 55 56 strcpy(tmpfil, _PATH_TMP "perror.XXXXXXXX"); 57 if (mkstemp(tmpfil) < 0) 58 err(1, "mkstemp"); 59 atexit(cleanup); 60 /* Reopen stderr on a file descriptor other than 2. */ 61 fclose(stderr); 62 for (i = 0; i < 3; i++) 63 dup(0); 64 if (freopen(tmpfil, "r+", stderr) == NULL) 65 err(1, "%s", tmpfil); 66 67 /* 68 * Test that perror() doesn't call strerror() (4.4BSD bug), 69 * the two ways of omitting a program name, and the formatting when 70 * a program name is specified. 71 */ 72 s = strerror(ENOENT); 73 assert(strcmp(s, "No such file or directory") == 0); 74 errno = EPERM; 75 perror(NULL); 76 perror(""); 77 perror("test-perror"); 78 assert(strcmp(s, "No such file or directory") == 0); 79 80 /* 81 * Read it back to check... 82 */ 83 rewind(stderr); 84 s = fgets(lbuf, sizeof(lbuf), stderr); 85 assert(s != NULL); 86 assert(strcmp(s, "Operation not permitted\n") == 0); 87 s = fgets(lbuf, sizeof(lbuf), stderr); 88 assert(s != NULL); 89 assert(strcmp(s, "Operation not permitted\n") == 0); 90 s = fgets(lbuf, sizeof(lbuf), stderr); 91 assert(s != NULL); 92 assert(strcmp(s, "test-perror: Operation not permitted\n") == 0); 93 s = fgets(lbuf, sizeof(lbuf), stderr); 94 assert(s == NULL); 95 fclose(stderr); 96 97 printf("ok 1 - perror()\n"); 98 99 return (0); 100} 101 102static void 103cleanup(void) 104{ 105 106 unlink(tmpfil); 107} 108