1 /*- 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Ken Arnold. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /* 34 * This program un-does what "strfile" makes, thereby obtaining the 35 * original file again. This can be invoked with the name of the output 36 * file, the input file, or both. If invoked with only a single argument 37 * ending in ".dat", it is pressumed to be the input file and the output 38 * file will be the same stripped of the ".dat". If the single argument 39 * doesn't end in ".dat", then it is presumed to be the output file, and 40 * the input file is that name prepended by a ".dat". If both are given 41 * they are treated literally as the input and output files. 42 * 43 * Ken Arnold Aug 13, 1978 44 */ 45 46 #include <sys/param.h> 47 #include <sys/endian.h> 48 #include <ctype.h> 49 #include <err.h> 50 #include <stdio.h> 51 #include <stdlib.h> 52 #include <string.h> 53 54 #include "strfile.h" 55 56 static char *Infile, /* name of input file */ 57 Datafile[MAXPATHLEN], /* name of data file */ 58 Delimch; /* delimiter character */ 59 60 static FILE *Inf, *Dataf; 61 62 static void order_unstr(STRFILE *); 63 64 /* ARGSUSED */ 65 int 66 main(int argc, char *argv[]) 67 { 68 static STRFILE tbl; /* description table */ 69 70 if (argc != 2) { 71 fprintf(stderr, "usage: unstr datafile\n"); 72 exit(1); 73 } 74 Infile = argv[1]; 75 if ((size_t)snprintf(Datafile, sizeof(Datafile), "%s.dat", Infile) >= 76 sizeof(Datafile)) 77 errx(1, "%s name too long", Infile); 78 if ((Inf = fopen(Infile, "r")) == NULL) 79 err(1, "%s", Infile); 80 if ((Dataf = fopen(Datafile, "r")) == NULL) 81 err(1, "%s", Datafile); 82 if (fread((char *)&tbl, sizeof(tbl), 1, Dataf) != 1) { 83 if (feof(Dataf)) 84 errx(1, "%s read EOF", Datafile); 85 else 86 err(1, "%s read", Datafile); 87 } 88 tbl.str_version = be32toh(tbl.str_version); 89 tbl.str_numstr = be32toh(tbl.str_numstr); 90 tbl.str_longlen = be32toh(tbl.str_longlen); 91 tbl.str_shortlen = be32toh(tbl.str_shortlen); 92 tbl.str_flags = be32toh(tbl.str_flags); 93 if (!(tbl.str_flags & (STR_ORDERED | STR_RANDOM))) 94 errx(1, "nothing to do -- table in file order"); 95 Delimch = tbl.str_delim; 96 order_unstr(&tbl); 97 fclose(Inf); 98 fclose(Dataf); 99 exit(0); 100 } 101 102 static void 103 order_unstr(STRFILE *tbl) 104 { 105 uint32_t i; 106 char *sp; 107 off_t pos; 108 char buf[BUFSIZ]; 109 110 for (i = 0; i < tbl->str_numstr; i++) { 111 fread(&pos, 1, sizeof(pos), Dataf); 112 fseeko(Inf, be64toh(pos), SEEK_SET); 113 if (i != 0) 114 printf("%c\n", Delimch); 115 for (;;) { 116 sp = fgets(buf, sizeof(buf), Inf); 117 if (sp == NULL || STR_ENDSTRING(sp, *tbl)) 118 break; 119 else 120 fputs(sp, stdout); 121 } 122 } 123 } 124