usr/src/cmd/sed/misc.c

   1 /*
   2  * Copyright 2010 Nexenta Systems, Inc.  All rights reserved.
   3  * Copyright (c) 1992 Diomidis Spinellis.
   4  * Copyright (c) 1992, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Diomidis Spinellis of Imperial College, University of London.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 4. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include <sys/types.h>
  36
  37 #include <err.h>
  38 #include <limits.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  * Return a string for a regular expression error passed.  This is overkill,
  50  * because of the silly semantics of regerror (we can never know the size of
  51  * the buffer).
  52  */
  53 char *
  54 strregerror(int errcode, regex_t *preg)
  55 {
  56         static char *oe;
  57         size_t s;
  58
  59         if (oe != NULL)
  60                 free(oe);
  61         s = regerror(errcode, preg, NULL, 0);
  62         if ((oe = malloc(s)) == NULL)
  63                 err(1, "malloc");
  64         (void) regerror(errcode, preg, oe, s);
  65         return (oe);
  66 }
  67
  68 void
  69 fatal(const char *fmt, ...)
  70 {
  71         va_list ap;
  72
  73         (void) fprintf(stderr, "%s: %lu: ", fname, linenum);
  74
  75         va_start(ap, fmt);
  76         (void) vfprintf(stderr, fmt, ap);
  77         va_end(ap);
  78
  79         (void) fputc('\n', stderr);
  80
  81         exit(1);
  82 }