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/* $OpenBSD: whatis.c,v 1.6 2001/11/19 19:02:17 mpech Exp $ */
/*
* Copyright (c) 1987, 1993
* The Regents of the University of California. All rights reserved.
*
* 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. 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, Berkeley and its contributors.
* 4. 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.
*/
#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1987, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)whatis.c 8.5 (Berkeley) 11/26/93";
#endif /* not lint */
#include <sys/param.h>
#include <sys/queue.h>
#include <ctype.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "../man/config.h"
#include "../man/pathnames.h"
#define MAXLINELEN 8192 /* max line handled */
static int *found, foundman;
extern char *__progname;
void dashtrunc __P((char *, char *));
int match __P((char *, char *));
void usage __P((void));
void whatis __P((char **, char *, int));
int
main(argc, argv)
int argc;
char *argv[];
{
ENTRY *ep;
TAG *tp;
int ch, rv;
char *beg, *conffile, **p, *p_augment, *p_path;
conffile = NULL;
p_augment = p_path = NULL;
while ((ch = getopt(argc, argv, "C:M:m:P:")) != -1)
switch (ch) {
case 'C':
conffile = optarg;
break;
case 'M':
case 'P': /* backward compatible */
p_path = optarg;
break;
case 'm':
p_augment = optarg;
break;
case '?':
default:
usage();
}
argv += optind;
argc -= optind;
if (argc < 1)
usage();
if ((found = malloc((u_int)argc * sizeof(int))) == NULL)
err(1, NULL);
memset(found, 0, argc * sizeof(int));
for (p = argv; *p; ++p) /* trim full paths */
if ((beg = strrchr(*p, '/')))
*p = beg + 1;
if (p_augment)
whatis(argv, p_augment, 1);
if (p_path || (p_path = getenv("MANPATH")))
whatis(argv, p_path, 1);
else {
config(conffile);
ep = (tp = getlist("_whatdb")) == NULL ?
NULL : tp->list.tqh_first;
for (; ep != NULL; ep = ep->q.tqe_next)
whatis(argv, ep->s, 0);
}
if (!foundman) {
fprintf(stderr, "whatis: no %s file found.\n", _PATH_WHATIS);
exit(1);
}
rv = 1;
for (p = argv; *p; ++p)
if (found[p - argv])
rv = 0;
else
printf("%s: not found\n", *p);
exit(rv);
}
void
whatis(argv, path, buildpath)
char **argv, *path;
int buildpath;
{
char *end, *name, **p;
char buf[MAXLINELEN + 1], wbuf[MAXLINELEN + 1];
char hold[MAXPATHLEN];
for (name = path; name; name = end) { /* through name list */
if ((end = strchr(name, ':')))
*end++ = '\0';
if (buildpath) {
(void)snprintf(hold, sizeof hold, "%s/%s",
name, _PATH_WHATIS);
name = hold;
}
if (!freopen(name, "r", stdin))
continue;
foundman = 1;
/* for each file found */
while (fgets(buf, sizeof(buf), stdin)) {
dashtrunc(buf, wbuf);
for (p = argv; *p; ++p)
if (match(wbuf, *p)) {
printf("%s", buf);
found[p - argv] = 1;
/* only print line once */
while (*++p)
if (match(wbuf, *p))
found[p - argv] = 1;
break;
}
}
}
}
/*
* match --
* match a full word or a full string
*/
int
match(bp, str)
char *bp, *str;
{
int len;
char *start;
if (!*str || !*bp)
return(0);
for (len = strlen(str);;) {
/* skip leading crud */
for (; *bp && !isalnum(*bp); ++bp)
;
if (!*bp)
break;
/* check for word match first */
for (start = bp++; *bp && (*bp == '_' || isalnum(*bp)); ++bp)
;
if (bp - start == len) {
if (strncasecmp(start, str, len) == 0)
return(1);
} else if (*bp && *bp != ',') {
/* check for full string match */
for (bp = start;
*bp && *bp != ',' && *bp != '(' && !isspace(*bp); ++bp)
;
if (bp - start == len && strncasecmp(start, str, len) == 0)
return(1);
}
}
return(0);
}
/*
* dashtrunc --
* truncate a string at " - "
*/
void
dashtrunc(from, to)
char *from, *to;
{
int ch;
for (; (ch = *from) && ch != '\n' &&
(ch != ' ' || from[1] != '-' || from[2] != ' '); ++from)
*to++ = ch;
*to = '\0';
}
/*
* usage --
* print usage message and die
*/
void
usage()
{
(void)fprintf(stderr,
"usage: %s [-C file] [-M path] [-m path] command ...\n",
__progname);
exit(1);
}
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