1 /* $OpenBSD: util.c,v 1.18 2016/10/16 09:35:40 tb Exp $ */
2 /* $NetBSD: util.c,v 1.5 1996/08/31 20:58:29 mycroft Exp $ */
3
4 /*
5 * Copyright (c) 1992, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * This software was developed by the Computer Systems Engineering group
9 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
10 * contributed to Berkeley.
11 *
12 * All advertising materials mentioning features or use of this software
13 * must display the following acknowledgement:
14 * This product includes software developed by the University of
15 * California, Lawrence Berkeley Laboratories.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions
19 * are met:
20 * 1. Redistributions of source code must retain the above copyright
21 * notice, this list of conditions and the following disclaimer.
22 * 2. Redistributions in binary form must reproduce the above copyright
23 * notice, this list of conditions and the following disclaimer in the
24 * documentation and/or other materials provided with the distribution.
25 * 3. Neither the name of the University nor the names of its contributors
26 * may be used to endorse or promote products derived from this software
27 * without specific prior written permission.
28 *
29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
32 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 * SUCH DAMAGE.
40 *
41 * from: @(#)util.c 8.1 (Berkeley) 6/6/93
42 */
43
44 #include <sys/types.h>
45
46 #include <ctype.h>
47 #include <err.h>
48 #include <stdarg.h>
49 #include <stdio.h>
50 #include <stdlib.h>
51 #include <string.h>
52
53 #include "config.h"
54
55 static void vxerror(const char *, int, const char *, va_list)
56 __attribute__((__format__ (printf, 3, 0)));
57
58 /*
59 * Malloc, with abort on error.
60 */
61 void *
emalloc(size_t size)62 emalloc(size_t size)
63 {
64 void *p;
65
66 if ((p = calloc(1, size)) == NULL)
67 err(1, NULL);
68 return p;
69 }
70
71 /*
72 * Reallocarray, with abort on error.
73 */
74 void *
ereallocarray(void * p,size_t sz1,size_t sz2)75 ereallocarray(void *p, size_t sz1, size_t sz2)
76 {
77
78 if ((p = reallocarray(p, sz1, sz2)) == NULL)
79 err(1, NULL);
80 return p;
81 }
82
83 /*
84 * Calloc, with abort on error.
85 */
86 void *
ecalloc(size_t sz1,size_t sz2)87 ecalloc(size_t sz1, size_t sz2)
88 {
89 void *p;
90
91 if ((p = calloc(sz1, sz2)) == NULL)
92 err(1, NULL);
93 return p;
94 }
95
96 /*
97 * Prepend the source path to a file name.
98 */
99 char *
sourcepath(const char * file)100 sourcepath(const char *file)
101 {
102 char *cp;
103
104 if (asprintf(&cp, "%s/%s", srcdir, file) == -1)
105 err(1, NULL);
106
107 return cp;
108 }
109
110 static struct nvlist *nvhead;
111
112 struct nvlist *
newnv(const char * name,const char * str,void * ptr,int i,struct nvlist * next)113 newnv(const char *name, const char *str, void *ptr, int i, struct nvlist *next)
114 {
115 struct nvlist *nv;
116
117 if ((nv = nvhead) == NULL)
118 nv = emalloc(sizeof(*nv));
119 else
120 nvhead = nv->nv_next;
121 nv->nv_next = next;
122 nv->nv_name = (char *)name;
123 if (ptr == NULL)
124 nv->nv_str = str;
125 else {
126 if (str != NULL)
127 panic("newnv");
128 nv->nv_ptr = ptr;
129 }
130 nv->nv_int = i;
131 return nv;
132 }
133
134 /*
135 * Free an nvlist structure (just one).
136 */
137 void
nvfree(struct nvlist * nv)138 nvfree(struct nvlist *nv)
139 {
140
141 nv->nv_next = nvhead;
142 nvhead = nv;
143 }
144
145 /*
146 * Free an nvlist (the whole list).
147 */
148 void
nvfreel(struct nvlist * nv)149 nvfreel(struct nvlist *nv)
150 {
151 struct nvlist *next;
152
153 for (; nv != NULL; nv = next) {
154 next = nv->nv_next;
155 nv->nv_next = nvhead;
156 nvhead = nv;
157 }
158 }
159
160 /*
161 * External (config file) error. Complain, using current file
162 * and line number.
163 */
164 void
error(const char * fmt,...)165 error(const char *fmt, ...)
166 {
167 va_list ap;
168 extern const char *yyfile;
169
170 va_start(ap, fmt);
171 vxerror(yyfile, currentline(), fmt, ap);
172 va_end(ap);
173 }
174
175 /*
176 * Delayed config file error (i.e., something was wrong but we could not
177 * find out about it until later).
178 */
179 void
xerror(const char * file,int line,const char * fmt,...)180 xerror(const char *file, int line, const char *fmt, ...)
181 {
182 va_list ap;
183
184 va_start(ap, fmt);
185 vxerror(file, line, fmt, ap);
186 va_end(ap);
187 }
188
189 /*
190 * Internal form of error() and xerror().
191 */
192 static void
vxerror(const char * file,int line,const char * fmt,va_list ap)193 vxerror(const char *file, int line, const char *fmt, va_list ap)
194 {
195
196 (void)fprintf(stderr, "%s:%d: ", file, line);
197 (void)vfprintf(stderr, fmt, ap);
198 (void)putc('\n', stderr);
199 errors++;
200 }
201
202 /*
203 * Internal error, abort.
204 */
205 __dead void
panic(const char * fmt,...)206 panic(const char *fmt, ...)
207 {
208 va_list ap;
209
210 va_start(ap, fmt);
211 (void)fprintf(stderr, "config: panic: ");
212 (void)vfprintf(stderr, fmt, ap);
213 (void)putc('\n', stderr);
214 va_end(ap);
215 exit(2);
216 }
217