1 /* $OpenBSD: misc.c,v 1.11 2015/10/26 14:08:47 mmcc Exp $ */ 2 3 /*- 4 * Copyright (c) 1992 Diomidis Spinellis. 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Diomidis Spinellis of Imperial College, University of London. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/types.h> 37 38 #include <errno.h> 39 #include <regex.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <stdarg.h> 44 45 #include "defs.h" 46 #include "extern.h" 47 48 /* 49 * malloc with result test 50 */ 51 void * 52 xmalloc(size_t size) 53 { 54 void *p; 55 56 if ((p = malloc(size)) == NULL) 57 error(FATAL, "%s", strerror(errno)); 58 return (p); 59 } 60 61 void * 62 xreallocarray(void *o, size_t nmemb, size_t size) 63 { 64 void *p; 65 66 if ((p = reallocarray(o, nmemb, size)) == NULL) 67 error(FATAL, "%s", strerror(errno)); 68 return (p); 69 } 70 71 /* 72 * realloc with result test 73 */ 74 void * 75 xrealloc(void *p, size_t size) 76 { 77 78 if ((p = realloc(p, size)) == NULL) 79 error(FATAL, "%s", strerror(errno)); 80 return (p); 81 } 82 83 /* 84 * Return a string for a regular expression error passed. This is a overkill, 85 * because of the silly semantics of regerror (we can never know the size of 86 * the buffer). 87 */ 88 char * 89 strregerror(int errcode, regex_t *preg) 90 { 91 static char *oe; 92 size_t s; 93 94 free(oe); 95 s = regerror(errcode, preg, "", 0); 96 oe = xmalloc(s); 97 (void)regerror(errcode, preg, oe, s); 98 return (oe); 99 } 100 101 /* 102 * Error reporting function 103 */ 104 void 105 error(int severity, const char *fmt, ...) 106 { 107 va_list ap; 108 109 va_start(ap, fmt); 110 (void)fprintf(stderr, "sed: "); 111 switch (severity) { 112 case WARNING: 113 case COMPILE: 114 (void)fprintf(stderr, "%lu: %s: ", linenum, fname); 115 } 116 (void)vfprintf(stderr, fmt, ap); 117 va_end(ap); 118 (void)fprintf(stderr, "\n"); 119 if (severity == WARNING) 120 return; 121 exit(1); 122 /* NOTREACHED */ 123 } 124