320 lines
6.9 KiB
C
320 lines
6.9 KiB
C
/* $NetBSD: util.c,v 1.15 2002/01/29 10:20:37 tv Exp $ */
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Lawrence Berkeley Laboratories.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)util.c 8.1 (Berkeley) 6/6/93
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*/
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#include <ctype.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdarg.h>
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#include <sys/types.h>
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#include "defs.h"
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static void nomem(void);
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static void vxerror(const char *, int, const char *, va_list)
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__attribute__((__format__(__printf__, 3, 0)));
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static void vxwarn(const char *, int, const char *, va_list)
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__attribute__((__format__(__printf__, 3, 0)));
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static void vxmsg(const char *fname, int line, const char *class,
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const char *fmt, va_list)
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__attribute__((__format__(__printf__, 4, 0)));
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/*
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* Malloc, with abort on error.
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*/
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void *
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emalloc(size_t size)
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{
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void *p;
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if ((p = malloc(size)) == NULL)
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nomem();
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return (p);
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}
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/*
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* Realloc, with abort on error.
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*/
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void *
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erealloc(void *p, size_t size)
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{
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if ((p = realloc(p, size)) == NULL)
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nomem();
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return (p);
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}
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/*
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* Strdup, with abort on error.
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*/
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char *
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estrdup(const char *p)
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{
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char *cp;
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if ((cp = strdup(p)) == NULL)
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nomem();
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return (cp);
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}
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static void
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nomem(void)
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{
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(void)fprintf(stderr, "config: out of memory\n");
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exit(1);
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}
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/*
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* Push a prefix onto the prefix stack.
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*/
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void
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prefix_push(const char *path)
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{
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struct prefix *pf;
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char *cp;
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pf = emalloc(sizeof(struct prefix));
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if (prefixes != NULL && *path != '/') {
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cp = emalloc(strlen(prefixes->pf_prefix) + 1 +
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strlen(path) + 1);
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(void) sprintf(cp, "%s/%s", prefixes->pf_prefix, path);
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pf->pf_prefix = intern(cp);
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free(cp);
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} else
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pf->pf_prefix = intern(path);
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pf->pf_next = prefixes;
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prefixes = pf;
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}
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/*
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* Pop a prefix off the prefix stack.
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*/
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void
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prefix_pop(void)
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{
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struct prefix *pf;
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if ((pf = prefixes) == NULL) {
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error("no prefixes on the stack to pop");
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return;
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}
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prefixes = pf->pf_next;
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/* Remember this prefix for emitting -I... directives later. */
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pf->pf_next = allprefixes;
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allprefixes = pf;
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}
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/*
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* Prepend the source path to a file name.
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*/
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char *
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sourcepath(const char *file)
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{
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size_t len;
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char *cp;
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if (prefixes != NULL && *prefixes->pf_prefix == '/')
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len = strlen(prefixes->pf_prefix) + 1 + strlen(file) + 1;
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else {
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len = strlen(srcdir) + 1 + strlen(file) + 1;
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if (prefixes != NULL)
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len += strlen(prefixes->pf_prefix) + 1;
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}
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cp = emalloc(len);
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if (prefixes != NULL) {
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if (*prefixes->pf_prefix == '/')
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(void) sprintf(cp, "%s/%s", prefixes->pf_prefix, file);
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else
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(void) sprintf(cp, "%s/%s/%s", srcdir,
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prefixes->pf_prefix, file);
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} else
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(void) sprintf(cp, "%s/%s", srcdir, file);
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return (cp);
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}
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static struct nvlist *nvhead;
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struct nvlist *
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newnv(const char *name, const char *str, void *ptr, int i, struct nvlist *next)
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{
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struct nvlist *nv;
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if ((nv = nvhead) == NULL)
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nv = emalloc(sizeof(*nv));
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else
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nvhead = nv->nv_next;
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nv->nv_next = next;
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nv->nv_name = name;
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if (ptr == NULL)
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nv->nv_str = str;
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else {
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if (str != NULL)
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panic("newnv");
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nv->nv_ptr = ptr;
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}
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nv->nv_int = i;
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return (nv);
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}
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/*
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* Free an nvlist structure (just one).
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*/
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void
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nvfree(struct nvlist *nv)
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{
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nv->nv_next = nvhead;
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nvhead = nv;
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}
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/*
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* Free an nvlist (the whole list).
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*/
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void
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nvfreel(struct nvlist *nv)
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{
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struct nvlist *next;
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for (; nv != NULL; nv = next) {
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next = nv->nv_next;
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nv->nv_next = nvhead;
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nvhead = nv;
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}
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}
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void
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warn(const char *fmt, ...)
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{
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va_list ap;
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extern const char *yyfile;
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va_start(ap, fmt);
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vxwarn(yyfile, currentline(), fmt, ap);
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va_end(ap);
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}
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static void
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vxwarn(const char *file, int line, const char *fmt, va_list ap)
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{
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vxmsg(file, line, "warning: ", fmt, ap);
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}
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/*
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* External (config file) error. Complain, using current file
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* and line number.
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*/
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void
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error(const char *fmt, ...)
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{
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va_list ap;
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extern const char *yyfile;
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va_start(ap, fmt);
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vxerror(yyfile, currentline(), fmt, ap);
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va_end(ap);
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}
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/*
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* Delayed config file error (i.e., something was wrong but we could not
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* find out about it until later).
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*/
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void
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xerror(const char *file, int line, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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vxerror(file, line, fmt, ap);
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va_end(ap);
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}
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/*
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* Internal form of error() and xerror().
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*/
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static void
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vxerror(const char *file, int line, const char *fmt, va_list ap)
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{
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vxmsg(file, line, "", fmt, ap);
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errors++;
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}
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/*
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* Internal error, abort.
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*/
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__dead void
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panic(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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(void)fprintf(stderr, "config: panic: ");
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(void)vfprintf(stderr, fmt, ap);
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(void)putc('\n', stderr);
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va_end(ap);
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exit(2);
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}
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/*
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* Internal form of error() and xerror().
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*/
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static void
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vxmsg(const char *file, int line, const char *msgclass, const char *fmt,
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va_list ap)
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{
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(void)fprintf(stderr, "%s:%d: %s", file, line, msgclass);
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(void)vfprintf(stderr, fmt, ap);
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(void)putc('\n', stderr);
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}
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