NetBSD/usr.bin/man/whatis/whatis.c

205 lines
5.0 KiB
C

/*
* Copyright (c) 1987 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
char copyright[] =
"@(#) Copyright (c) 1987 Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */
#ifndef lint
/*static char sccsid[] = "from: @(#)whatis.c 5.6 (Berkeley) 6/1/90";*/
static char rcsid[] = "$Id: whatis.c,v 1.5 1993/08/02 18:17:33 mycroft Exp $";
#endif /* not lint */
#include <sys/param.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#include "../man/pathnames.h"
#define MAXLINELEN 4096 /* max line handled */
char *progname;
static int *found, foundman;
main(argc, argv)
int argc;
char **argv;
{
extern char *optarg;
extern int optind;
register char *beg, **p;
int ch;
char *p_augment, *p_path, **getdb();
progname = "whatis";
p_augment = p_path = NULL; /* 20 Aug 92*/
while ((ch = getopt(argc, argv, "M:m:P:")) != EOF)
switch((char)ch) {
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();
/*NOSTRICT*/
if (!(found = (int *)malloc((u_int)argc)))
enomem();
bzero((char *)found, argc * sizeof(int));
for (p = argv; *p; ++p) /* trim full paths */
if (beg = rindex(*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
for (p = getdb(); *p; ++p)
whatis(argv, *p, 0);
if (!foundman) {
fprintf(stderr, "whatis: no %s file found.\n", _PATH_WHATIS);
exit(1);
}
for (p = argv; *p; ++p)
if (!found[p - argv])
printf("%s: not found\n", *p);
}
whatis(argv, path, buildpath)
char **argv, *path;
int buildpath;
{
register char *end, *name, **p;
char buf[MAXLINELEN + 1], wbuf[MAXLINELEN + 1];
for (name = path; name; name = end) { /* through name list */
if (end = index(name, ':'))
*end++ = '\0';
if (buildpath) {
char hold[MAXPATHLEN + 1];
(void)sprintf(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
*/
match(bp, str)
register char *bp, *str;
{
register int len;
register char *start;
if (!*str || !*bp)
return(0);
for (len = strlen(str);;) {
for (; *bp && !isdigit(*bp) && !isalpha(*bp); ++bp);
if (!*bp)
break;
for (start = bp++;
*bp && (*bp == '_' || isdigit(*bp) || isalpha(*bp)); ++bp);
if (bp - start == len && !strncasecmp(start, str, len))
return(1);
}
return(0);
}
/*
* dashtrunc --
* truncate a string at " - "
*/
dashtrunc(from, to)
register char *from, *to;
{
register int ch;
for (; (ch = *from) && ch != '\n' &&
(ch != ' ' || from[1] != '-' || from[2] != ' '); ++from)
*to++ = ch;
*to = '\0';
}
/*
* usage --
* print usage message and die
*/
usage()
{
(void)fprintf(stderr,
"usage: whatis [-M path] [-m path] command ...\n");
exit(1);
}