Subversion Repositories planix.SVN

#include <u.h>

#include <libc.h>

#include <bio.h>

#include <ndb.h>

#include <ndbhf.h>

/*

 *  look up the ip attributes 'list' for an entry that has the

 *  given 'attr=val' and a 'ip=' tuples.

 *

 *  return nil if not found.

 */

Ndbtuple*

csipinfo(char *netroot, char *attr, char *val, char **list, int n)

{

	Ndbtuple *t, *first, *last;

	int i;

	char line[1024];

	int fd;

	char *p, *e;

	if(netroot)

		snprint(line, sizeof(line), "%s/cs", netroot);

	else

		strcpy(line, "/net/cs");

	fd = open(line, ORDWR);

	if(fd < 0)

		return 0;

	seek(fd, 0, 0);

	e = line + sizeof(line);

	p = seprint(line, e, "!ipinfo %s=%s", attr, val);

	for(i = 0; i < n; i++){

		if(*list == nil)

			break;

		p = seprint(p, e, " %s", *list++);

	}

	if(write(fd, line, strlen(line)) < 0){

		close(fd);

		return 0;

	}

	seek(fd, 0, 0);

	first = last = 0;

	for(;;){

		n = read(fd, line, sizeof(line)-2);

		if(n <= 0)

			break;

		line[n] = '\n';

		line[n+1] = 0;

		t = _ndbparseline(line);

		if(t == 0)

			continue;

		if(first)

			last->entry = t;

		else

			first = t;

		last = t;

		while(last->entry)

			last = last->entry;

	}

	close(fd);

	ndbsetmalloctag(first, getcallerpc(&netroot));

	return first;

}