misc.c (3314B)
1 /* $OpenBSD: misc.c,v 1.10 2014/10/08 04:19:08 deraadt 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 #include "util.h" 48 49 /* 50 * malloc with result test 51 */ 52 void * 53 xmalloc(size_t size) 54 { 55 void *p; 56 57 if ((p = malloc(size)) == NULL) 58 err(FATAL, "%s", strerror(errno)); 59 return (p); 60 } 61 62 void * 63 xreallocarray(void *o, size_t nmemb, size_t size) 64 { 65 void *p; 66 67 if ((p = reallocarray(o, nmemb, size)) == NULL) 68 err(FATAL, "%s", strerror(errno)); 69 return (p); 70 } 71 72 /* 73 * realloc with result test 74 */ 75 void * 76 xrealloc(void *p, size_t size) 77 { 78 79 if ((p = realloc(p, size)) == NULL) 80 err(FATAL, "%s", strerror(errno)); 81 return (p); 82 } 83 84 /* 85 * Return a string for a regular expression error passed. This is a overkill, 86 * because of the silly semantics of regerror (we can never know the size of 87 * the buffer). 88 */ 89 char * 90 strregerror(int errcode, regex_t *preg) 91 { 92 static char *oe; 93 size_t s; 94 95 free(oe); 96 s = regerror(errcode, preg, "", 0); 97 oe = xmalloc(s); 98 (void)regerror(errcode, preg, oe, s); 99 return (oe); 100 } 101 102 /* 103 * Error reporting function 104 */ 105 void 106 err(int severity, const char *fmt, ...) 107 { 108 va_list ap; 109 110 va_start(ap, fmt); 111 (void)fprintf(stderr, "sed: "); 112 switch (severity) { 113 case WARNING: 114 case COMPILE: 115 (void)fprintf(stderr, "%lu: %s: ", linenum, fname); 116 } 117 (void)vfprintf(stderr, fmt, ap); 118 va_end(ap); 119 (void)fprintf(stderr, "\n"); 120 if (severity == WARNING) 121 return; 122 exit(1); 123 /* NOTREACHED */ 124 }