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    /*	$OpenBSD: util.c,v 1.18 2016/10/16 09:35:40 tb Exp $	*/  | 
    
    
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    /*	$NetBSD: util.c,v 1.5 1996/08/31 20:58:29 mycroft 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. 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 <sys/types.h>  | 
    
    
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    #include <ctype.h>  | 
    
    
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    #include <err.h>  | 
    
    
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    #include <stdarg.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 "config.h"  | 
    
    
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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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    /*  | 
    
    
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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 = calloc(1, size)) == NULL)  | 
    
    
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    		err(1, NULL);  | 
    
    
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    	return p;  | 
    
    
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    }  | 
    
    
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    /*  | 
    
    
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     * Reallocarray, with abort on error.  | 
    
    
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     */  | 
    
    
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    void *  | 
    
    
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    ereallocarray(void *p, size_t sz1, size_t sz2)  | 
    
    
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    { | 
    
    
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    	if ((p = reallocarray(p, sz1, sz2)) == NULL)  | 
    
    
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    		err(1, NULL);  | 
    
    
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    	return p;  | 
    
    
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    }  | 
    
    
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    /*  | 
    
    
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     * Calloc, with abort on error.  | 
    
    
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     */  | 
    
    
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    void *  | 
    
    
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    ecalloc(size_t sz1, size_t sz2)  | 
    
    
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    { | 
    
    
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    	void *p;  | 
    
    
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    	if ((p = calloc(sz1, sz2)) == NULL)  | 
    
    
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    		err(1, NULL);  | 
    
    
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    	return p;  | 
    
    
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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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    	char *cp;  | 
    
    
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    	if (asprintf(&cp, "%s/%s", srcdir, file) == -1)  | 
    
    
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    		err(1, NULL);  | 
    
    
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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 = (char *)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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    /*  | 
    
    
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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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    	(void)fprintf(stderr, "%s:%d: ", file, line);  | 
    
    
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    	(void)vfprintf(stderr, fmt, ap);  | 
    
    
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    	(void)putc('\n', stderr); | 
    
    
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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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    }  |