1 /* $OpenBSD: misc.c,v 1.6 2004/07/20 03:50:26 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 #ifndef lint
37 /* from: static char sccsid[] = "@(#)misc.c 8.1 (Berkeley) 6/6/93"; */
38 static char *rcsid = "$OpenBSD: misc.c,v 1.6 2004/07/20 03:50:26 deraadt Exp $";
39 #endif /* not lint */
40
41 #include <sys/types.h>
42
43 #include <errno.h>
44 #include <regex.h>
45 #include <stdio.h>
46 #include <stdlib.h>
47 #include <string.h>
48 #include <stdarg.h>
49
50 #include "defs.h"
51 #include "extern.h"
52
53 /*
54 * malloc with result test
55 */
56 void *
xmalloc(u_int size)57 xmalloc(u_int size)
58 {
59 void *p;
60
61 if ((p = malloc(size)) == NULL)
62 err(FATAL, "%s", strerror(errno));
63 return (p);
64 }
65
66 /*
67 * realloc with result test
68 */
69 void *
xrealloc(void * p,u_int size)70 xrealloc(void *p, u_int size)
71 {
72 if (p == NULL) /* Compatibility hack. */
73 return (xmalloc(size));
74
75 if ((p = realloc(p, size)) == NULL)
76 err(FATAL, "%s", strerror(errno));
77 return (p);
78 }
79
80 /*
81 * Return a string for a regular expression error passed. This is a overkill,
82 * because of the silly semantics of regerror (we can never know the size of
83 * the buffer).
84 */
85 char *
strregerror(int errcode,regex_t * preg)86 strregerror(int errcode, regex_t *preg)
87 {
88 static char *oe;
89 size_t s;
90
91 if (oe != NULL)
92 free(oe);
93 s = regerror(errcode, preg, "", 0);
94 oe = xmalloc(s);
95 (void)regerror(errcode, preg, oe, s);
96 return (oe);
97 }
98
99 /*
100 * Error reporting function
101 */
102 void
err(int severity,const char * fmt,...)103 err(int severity, const char *fmt, ...)
104 {
105 va_list ap;
106
107 va_start(ap, fmt);
108 (void)fprintf(stderr, "sed: ");
109 switch (severity) {
110 case WARNING:
111 case COMPILE:
112 (void)fprintf(stderr, "%lu: %s: ", linenum, fname);
113 }
114 (void)vfprintf(stderr, fmt, ap);
115 va_end(ap);
116 (void)fprintf(stderr, "\n");
117 if (severity == WARNING)
118 return;
119 exit(1);
120 /* NOTREACHED */
121 }
122