NetBSD/usr.sbin/config/util.c

337 lines
7.1 KiB
C

/* $NetBSD: util.c,v 1.21 2004/06/20 22:20:17 jmc Exp $ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Lawrence Berkeley Laboratories.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: @(#)util.c 8.1 (Berkeley) 6/6/93
*/
#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <sys/types.h>
#include "defs.h"
static void nomem(void);
static void vxerror(const char *, int, const char *, va_list)
__attribute__((__format__(__printf__, 3, 0)));
static void vxwarn(const char *, int, const char *, va_list)
__attribute__((__format__(__printf__, 3, 0)));
static void vxmsg(const char *fname, int line, const char *class,
const char *fmt, va_list)
__attribute__((__format__(__printf__, 4, 0)));
/*
* Calloc, with abort on error.
*/
void *
ecalloc(size_t nelem, size_t size)
{
void *p;
if ((p = calloc(nelem, size)) == NULL)
nomem();
return (p);
}
/*
* Malloc, with abort on error.
*/
void *
emalloc(size_t size)
{
void *p;
if ((p = malloc(size)) == NULL)
nomem();
return (p);
}
/*
* Realloc, with abort on error.
*/
void *
erealloc(void *p, size_t size)
{
void *q;
if ((q = realloc(p, size)) == NULL)
nomem();
p = q;
return (p);
}
/*
* Strdup, with abort on error.
*/
char *
estrdup(const char *p)
{
char *cp;
if ((cp = strdup(p)) == NULL)
nomem();
return (cp);
}
static void
nomem(void)
{
(void)fprintf(stderr, "config: out of memory\n");
exit(1);
}
/*
* Push a prefix onto the prefix stack.
*/
void
prefix_push(const char *path)
{
struct prefix *pf;
char *cp;
pf = ecalloc(1, sizeof(struct prefix));
if (! SLIST_EMPTY(&prefixes) && *path != '/') {
cp = emalloc(strlen(SLIST_FIRST(&prefixes)->pf_prefix) + 1 +
strlen(path) + 1);
(void) sprintf(cp, "%s/%s",
SLIST_FIRST(&prefixes)->pf_prefix, path);
pf->pf_prefix = intern(cp);
free(cp);
} else
pf->pf_prefix = intern(path);
SLIST_INSERT_HEAD(&prefixes, pf, pf_next);
}
/*
* Pop a prefix off the prefix stack.
*/
void
prefix_pop(void)
{
struct prefix *pf;
if ((pf = SLIST_FIRST(&prefixes)) == NULL) {
error("no prefixes on the stack to pop");
return;
}
SLIST_REMOVE_HEAD(&prefixes, pf_next);
/* Remember this prefix for emitting -I... directives later. */
SLIST_INSERT_HEAD(&allprefixes, pf, pf_next);
}
/*
* Prepend the source path to a file name.
*/
char *
sourcepath(const char *file)
{
size_t len;
char *cp;
struct prefix *pf;
pf = SLIST_EMPTY(&prefixes) ? NULL : SLIST_FIRST(&prefixes);
if (pf != NULL && *pf->pf_prefix == '/')
len = strlen(pf->pf_prefix) + 1 + strlen(file) + 1;
else {
len = strlen(srcdir) + 1 + strlen(file) + 1;
if (pf != NULL)
len += strlen(pf->pf_prefix) + 1;
}
cp = emalloc(len);
if (pf != NULL) {
if (*pf->pf_prefix == '/')
(void) sprintf(cp, "%s/%s", pf->pf_prefix, file);
else
(void) sprintf(cp, "%s/%s/%s", srcdir,
pf->pf_prefix, file);
} else
(void) sprintf(cp, "%s/%s", srcdir, file);
return (cp);
}
static struct nvlist *nvfreelist;
struct nvlist *
newnv(const char *name, const char *str, void *ptr, int i, struct nvlist *next)
{
struct nvlist *nv;
if ((nv = nvfreelist) == NULL)
nv = ecalloc(1, sizeof(*nv));
else
nvfreelist = nv->nv_next;
nv->nv_next = next;
nv->nv_name = name;
if (ptr == NULL)
nv->nv_str = str;
else {
if (str != NULL)
panic("newnv");
nv->nv_ptr = ptr;
}
nv->nv_int = i;
return (nv);
}
/*
* Free an nvlist structure (just one).
*/
void
nvfree(struct nvlist *nv)
{
memset(nv, 0, sizeof(*nv));
nv->nv_next = nvfreelist;
nvfreelist = nv;
}
/*
* Free an nvlist (the whole list).
*/
void
nvfreel(struct nvlist *nv)
{
struct nvlist *next;
for (; nv != NULL; nv = next) {
next = nv->nv_next;
memset(nv, 0, sizeof(*nv));
nv->nv_next = nvfreelist;
nvfreelist = nv;
}
}
void
warn(const char *fmt, ...)
{
va_list ap;
extern const char *yyfile;
va_start(ap, fmt);
vxwarn(yyfile, currentline(), fmt, ap);
va_end(ap);
}
static void
vxwarn(const char *file, int line, const char *fmt, va_list ap)
{
vxmsg(file, line, "warning: ", fmt, ap);
}
/*
* External (config file) error. Complain, using current file
* and line number.
*/
void
error(const char *fmt, ...)
{
va_list ap;
extern const char *yyfile;
va_start(ap, fmt);
vxerror(yyfile, currentline(), fmt, ap);
va_end(ap);
}
/*
* Delayed config file error (i.e., something was wrong but we could not
* find out about it until later).
*/
void
xerror(const char *file, int line, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vxerror(file, line, fmt, ap);
va_end(ap);
}
/*
* Internal form of error() and xerror().
*/
static void
vxerror(const char *file, int line, const char *fmt, va_list ap)
{
vxmsg(file, line, "", fmt, ap);
errors++;
}
/*
* Internal error, abort.
*/
__dead void
panic(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
(void)fprintf(stderr, "config: panic: ");
(void)vfprintf(stderr, fmt, ap);
(void)putc('\n', stderr);
va_end(ap);
exit(2);
}
/*
* Internal form of error() and xerror().
*/
static void
vxmsg(const char *file, int line, const char *msgclass, const char *fmt,
va_list ap)
{
(void)fprintf(stderr, "%s:%d: %s", file, line, msgclass);
(void)vfprintf(stderr, fmt, ap);
(void)putc('\n', stderr);
}