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Diffstat (limited to 'usr.bin/fortune/unstr/unstr.c')
| -rw-r--r-- | usr.bin/fortune/unstr/unstr.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/usr.bin/fortune/unstr/unstr.c b/usr.bin/fortune/unstr/unstr.c new file mode 100644 index 000000000000..7cf7e1321cd7 --- /dev/null +++ b/usr.bin/fortune/unstr/unstr.c @@ -0,0 +1,123 @@ +/*- + * Copyright (c) 1991, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Ken Arnold. + * + * 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. + */ + +/* + * This program un-does what "strfile" makes, thereby obtaining the + * original file again. This can be invoked with the name of the output + * file, the input file, or both. If invoked with only a single argument + * ending in ".dat", it is pressumed to be the input file and the output + * file will be the same stripped of the ".dat". If the single argument + * doesn't end in ".dat", then it is presumed to be the output file, and + * the input file is that name prepended by a ".dat". If both are given + * they are treated literally as the input and output files. + * + * Ken Arnold Aug 13, 1978 + */ + +#include <sys/param.h> +#include <sys/endian.h> +#include <ctype.h> +#include <err.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "strfile.h" + +static char *Infile, /* name of input file */ + Datafile[MAXPATHLEN], /* name of data file */ + Delimch; /* delimiter character */ + +static FILE *Inf, *Dataf; + +static void order_unstr(STRFILE *); + +/* ARGSUSED */ +int +main(int argc, char *argv[]) +{ + static STRFILE tbl; /* description table */ + + if (argc != 2) { + fprintf(stderr, "usage: unstr datafile\n"); + exit(1); + } + Infile = argv[1]; + if ((size_t)snprintf(Datafile, sizeof(Datafile), "%s.dat", Infile) >= + sizeof(Datafile)) + errx(1, "%s name too long", Infile); + if ((Inf = fopen(Infile, "r")) == NULL) + err(1, "%s", Infile); + if ((Dataf = fopen(Datafile, "r")) == NULL) + err(1, "%s", Datafile); + if (fread((char *)&tbl, sizeof(tbl), 1, Dataf) != 1) { + if (feof(Dataf)) + errx(1, "%s read EOF", Datafile); + else + err(1, "%s read", Datafile); + } + tbl.str_version = be32toh(tbl.str_version); + tbl.str_numstr = be32toh(tbl.str_numstr); + tbl.str_longlen = be32toh(tbl.str_longlen); + tbl.str_shortlen = be32toh(tbl.str_shortlen); + tbl.str_flags = be32toh(tbl.str_flags); + if (!(tbl.str_flags & (STR_ORDERED | STR_RANDOM))) + errx(1, "nothing to do -- table in file order"); + Delimch = tbl.str_delim; + order_unstr(&tbl); + fclose(Inf); + fclose(Dataf); + exit(0); +} + +static void +order_unstr(STRFILE *tbl) +{ + uint32_t i; + char *sp; + off_t pos; + char buf[BUFSIZ]; + + for (i = 0; i < tbl->str_numstr; i++) { + fread(&pos, 1, sizeof(pos), Dataf); + fseeko(Inf, be64toh(pos), SEEK_SET); + if (i != 0) + printf("%c\n", Delimch); + for (;;) { + sp = fgets(buf, sizeof(buf), Inf); + if (sp == NULL || STR_ENDSTRING(sp, *tbl)) + break; + else + fputs(sp, stdout); + } + } +} |