fatbase

portable OpenBSD tools
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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 }