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unstr.c revision 1.6 
      1 /*	$NetBSD: unstr.c,v 1.6 1999/09/08 21:57:17 jsm Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1991, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * This code is derived from software contributed to Berkeley by
      8  * Ken Arnold.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *	This product includes software developed by the University of
     21  *	California, Berkeley and its contributors.
     22  * 4. Neither the name of the University nor the names of its contributors
     23  *    may be used to endorse or promote products derived from this software
     24  *    without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     36  * SUCH DAMAGE.
     37  */
     38 
     39 #include <sys/cdefs.h>
     40 #ifndef lint
     41 __COPYRIGHT("@(#) Copyright (c) 1991, 1993\n\
     42 	The Regents of the University of California.  All rights reserved.\n");
     43 #endif /* not lint */
     44 
     45 #ifndef lint
     46 #if 0
     47 static char sccsid[] = "@(#)unstr.c	8.1 (Berkeley) 5/31/93";
     48 #else
     49 __RCSID("$NetBSD: unstr.c,v 1.6 1999/09/08 21:57:17 jsm Exp $");
     50 #endif
     51 #endif /* not lint */
     52 
     53 /*
     54  *	This program un-does what "strfile" makes, thereby obtaining the
     55  * original file again.  This can be invoked with the name of the output
     56  * file, the input file, or both. If invoked with only a single argument
     57  * ending in ".dat", it is pressumed to be the input file and the output
     58  * file will be the same stripped of the ".dat".  If the single argument
     59  * doesn't end in ".dat", then it is presumed to be the output file, and
     60  * the input file is that name prepended by a ".dat".  If both are given
     61  * they are treated literally as the input and output files.
     62  *
     63  *	Ken Arnold		Aug 13, 1978
     64  */
     65 
     66 # include	<sys/types.h>
     67 # include	<sys/param.h>
     68 # include	<machine/endian.h>
     69 # include	<ctype.h>
     70 # include	<err.h>
     71 # include	<stdio.h>
     72 # include	<string.h>
     73 # include	"strfile.h"
     74 
     75 # ifndef MAXPATHLEN
     76 # define	MAXPATHLEN	1024
     77 # endif	/* MAXPATHLEN */
     78 
     79 char	*Infile,			/* name of input file */
     80 	Datafile[MAXPATHLEN],		/* name of data file */
     81 	Delimch;			/* delimiter character */
     82 
     83 FILE	*Inf, *Dataf;
     84 
     85 void	getargs __P((char *[]));
     86 int	main __P((int, char *[]));
     87 void	order_unstr __P((STRFILE *));
     88 
     89 /* ARGSUSED */
     90 int
     91 main(ac, av)
     92 	int	ac;
     93 	char	**av;
     94 {
     95 	static STRFILE	tbl;		/* description table */
     96 
     97 	getargs(av);
     98 	if ((Inf = fopen(Infile, "r")) == NULL)
     99 		err(1, "fopen %s", Infile);
    100 	if ((Dataf = fopen(Datafile, "r")) == NULL)
    101 		err(1, "fopen %s", Datafile);
    102 	(void) fread((char *) &tbl, sizeof tbl, 1, Dataf);
    103 	BE32TOH(tbl.str_version);
    104 	BE32TOH(tbl.str_numstr);
    105 	BE32TOH(tbl.str_longlen);
    106 	BE32TOH(tbl.str_shortlen);
    107 	BE32TOH(tbl.str_flags);
    108 	if (!(tbl.str_flags & (STR_ORDERED | STR_RANDOM))) {
    109 		fprintf(stderr, "nothing to do -- table in file order\n");
    110 		exit(1);
    111 	}
    112 	Delimch = tbl.str_delim;
    113 	order_unstr(&tbl);
    114 	(void) fclose(Inf);
    115 	(void) fclose(Dataf);
    116 	exit(0);
    117 }
    118 
    119 void
    120 getargs(av)
    121 	char	*av[];
    122 {
    123 	if (!*++av) {
    124 		(void) fprintf(stderr, "usage: unstr datafile\n");
    125 		exit(1);
    126 	}
    127 	Infile = *av;
    128 	(void) strcpy(Datafile, Infile);
    129 	(void) strcat(Datafile, ".dat");
    130 }
    131 
    132 void
    133 order_unstr(tbl)
    134 	STRFILE	*tbl;
    135 {
    136 	int	i;
    137 	char	*sp;
    138 	off_t	pos;
    139 	char	buf[BUFSIZ];
    140 
    141 	for (i = 0; i < tbl->str_numstr; i++) {
    142 		(void) fread((char *) &pos, 1, sizeof pos, Dataf);
    143 		(void) fseek(Inf, be64toh(pos), SEEK_SET);
    144 		if (i != 0)
    145 			(void) printf("%c\n", Delimch);
    146 		for (;;) {
    147 			sp = fgets(buf, sizeof buf, Inf);
    148 			if (sp == NULL || STR_ENDSTRING(sp, *tbl))
    149 				break;
    150 			else
    151 				fputs(sp, stdout);
    152 		}
    153 	}
    154 }
    155