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Revision 1.2, Tue Feb 7 21:02:33 2012 UTC (2 years, 8 months ago) by wiz
Branch: MAIN
CVS Tags: yamt-pagecache-base9, yamt-pagecache-base8, yamt-pagecache-base7, yamt-pagecache-base6, yamt-pagecache-base5, yamt-pagecache-base4, tls-maxphys-base, tls-maxphys, tls-earlyentropy-base, tls-earlyentropy, riastradh-xf86-video-intel-2-7-1-pre-2-21-15, riastradh-drm2-base3, riastradh-drm2-base2, riastradh-drm2-base1, riastradh-drm2-base, riastradh-drm2, netbsd-7-base, netbsd-7, netbsd-6-base, netbsd-6-1-RELEASE, netbsd-6-1-RC4, netbsd-6-1-RC3, netbsd-6-1-RC2, netbsd-6-1-RC1, netbsd-6-1-5-RELEASE, netbsd-6-1-4-RELEASE, netbsd-6-1-3-RELEASE, netbsd-6-1-2-RELEASE, netbsd-6-1-1-RELEASE, netbsd-6-1, netbsd-6-0-RELEASE, netbsd-6-0-RC2, netbsd-6-0-RC1, netbsd-6-0-6-RELEASE, netbsd-6-0-5-RELEASE, netbsd-6-0-4-RELEASE, netbsd-6-0-3-RELEASE, netbsd-6-0-2-RELEASE, netbsd-6-0-1-RELEASE, netbsd-6-0, netbsd-6, matt-nb6-plus-nbase, matt-nb6-plus-base, matt-nb6-plus, agc-symver-base, agc-symver, HEAD
Branch point for: yamt-pagecache
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.\" $NetBSD: run_query_pager.3,v 1.2 2012/02/07 21:02:33 wiz Exp $
.\"
.\" Copyright (c) 2011 Abhinav Upadhyay <er.abhinav.upadhyay@gmail.com>
.\" All rights reserved.
.\"
.\" This code was developed as part of Google's Summer of Code 2011 program.
.\"
.\" 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.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
.\" COPYRIGHT HOLDERS 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,
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.\" OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.Dd December 3, 2011
.Dt RUN_QUERY_PAGER 3
.Os
.Sh NAME
.Nm run_query_pager
.Nd run a query against
.Pa /var/db/man.db
and returns the results in a format which can be piped to a pager
.Sh SYNOPSIS
.In apropos-utils.h
.Ft int
.Fn run_query_pager "sqlite3 *db" "query_args *args"
.Sh DESCRIPTION
The
.Fn run_query_pager
is very similar to
.Xr run_query_html 3
with the only difference that the snippet returned is formatted in a manner so
that the matching text in it appears highlighted when viewed using a pager.
.Pp
For more details, refer to the manual page of
.Xr run_query 3 .
.Sh RETURN VALUES
On successful execution the
.Fn run_query_pager
function will return 0 and in case of an error \-1 will be returned.
.Sh FILES
.Bl -hang -width -compact
.It Pa /var/db/man.db
The Sqlite FTS database which contains an index of the manual pages.
.El
.Sh EXAMPLES
Following is a code excerpt of how
.Nm
can be used.
.Bd -literal -offset indent
#include <apropos-utils.h>
query_args args;
FILE *pager = popen("more", "w");
char *errmsg = NULL;
int *sec_nums = {0, 1, 1, 0, 0, 0, 0, 0, 0};
args.search_str = argv[1];
args.sec_nums = sec_nums;
args.nrec = -1;	//A negative value means fetch all matching records
args.offset = -1;
args.machine = NULL;
args.callback = &query_callback;
args.callback_data = (void *)pager;
args.errmsg = &errmsg;
if (run_query(db, &args) < 0)
		errx(EXIT_FAILURE, "%s", errmsg);
}

free(query);
free(errmsg);
pclose(pager);

static int
query_callback(void *data, const char *section, const char *name,
	const char *name_desc, const char *snippet, size_t snippet_length)
{
	FILE *out = (FILE *) data;
	fprintf(out, "%s(%s)\t%s\en%s\en\en", name, section, name_desc,
		snippet);
	return 0;
}
.Ed
.Sh SEE ALSO
.Xr apropos-utils 3 ,
.Xr close_db 3 ,
.Xr init_db 3 ,
.Xr run_query 3 ,
.Xr run_query_html 3
.Sh AUTHORS
.An Abhinav Upadhyay