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/*****************************************************************************
* Copyright (C) 2010-2011 Lawrence Livermore National Security, LLC.
* Written by Jim Garlick <garlick@llnl.gov> LLNL-CODE-423279
* All Rights Reserved.
*
* This file is part of the Distributed I/O Daemon (diod).
* For details, see <http://code.google.com/p/diod/>.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License (as published by the
* Free Software Foundation) version 2, dated June 1991.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the terms and conditions of the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA or see
* <http://www.gnu.org/licenses/>.
*****************************************************************************/
/* diodshowmount.c - cat ctl:connections */
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdarg.h>
#include <stdio.h>
#if HAVE_GETOPT_H
#include <getopt.h>
#endif
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include <libgen.h>
#include <signal.h>
#include "9p.h"
#include "npfs.h"
#include "npclient.h"
#include "list.h"
#include "hostlist.h"
#include "diod_log.h"
#include "diod_sock.h"
#include "diod_auth.h"
#define OPTIONS "s:m:u:t:l"
#if HAVE_GETOPT_LONG
#define GETOPT(ac,av,opt,lopt) getopt_long (ac,av,opt,lopt,NULL)
static const struct option longopts[] = {
{"server", required_argument, 0, 's'},
{"msize", required_argument, 0, 'm'},
{"uid", required_argument, 0, 'u'},
{"timeout", required_argument, 0, 't'},
{"long", no_argument, 0, 'l'},
{0, 0, 0, 0},
};
#else
#define GETOPT(ac,av,opt,lopt) getopt (ac,av,opt)
#endif
static void sigalarm (int arg);
static void
usage (void)
{
fprintf (stderr,
"Usage: diodshowmount [OPTIONS] [-s HOST[:PORT]]\n"
" -s,--server HOST:PORT server (default localhost:564)\n"
" -m,--msize msize (default 65536)\n"
" -u,--uid authenticate as uid (default is your euid)\n"
" -t,--timeout SECS give up after specified seconds\n"
" -l,--long list clients one per line and don't strip domain\n"
);
exit (1);
}
int
main (int argc, char *argv[])
{
char *server = NULL;
int msize = 65536;
uid_t uid = geteuid ();
int topt = 0;
Npcfsys *fs = NULL;
Npcfid *fid, *afid, *root;
int c, fd;
char buf[80], *host, *p;
hostlist_t hl;
hostlist_iterator_t itr;
int lopt = 0;
diod_log_init (argv[0]);
opterr = 0;
while ((c = GETOPT (argc, argv, OPTIONS, longopts)) != -1) {
switch (c) {
case 's': /* --server HOST[:PORT] or /path/to/socket */
server = optarg;
break;
case 'm': /* --msize SIZE */
msize = strtoul (optarg, NULL, 10);
break;
case 'u': /* --uid UID */
uid = strtoul (optarg, NULL, 10);
break;
case 't': /* --timeout SECS */
topt = strtoul (optarg, NULL, 10);
break;
case 'l': /* --long */
lopt = 1;
break;
default:
usage ();
}
}
if (signal (SIGPIPE, SIG_IGN) == SIG_ERR)
err_exit ("signal");
if (signal (SIGALRM, sigalarm) == SIG_ERR)
err_exit ("signal");
if (topt > 0)
alarm (topt);
if ((fd = diod_sock_connect (server, 0)) < 0)
exit (1);
if (!(fs = npc_start (fd, fd, msize, 0)))
errn_exit (np_rerror (), "error negotiating protocol with server");
if (!(afid = npc_auth (fs, "ctl", uid, diod_auth)) && np_rerror () != 0)
errn_exit (np_rerror (), "error authenticating to server");
if (!(root = npc_attach (fs, afid, "ctl", uid)))
errn_exit (np_rerror (), "error attaching to aname=ctl");
if (!(fid = npc_open_bypath (root, "connections", O_RDONLY)))
errn_exit (np_rerror (), "open connections");
if (!(hl = hostlist_create (NULL)))
err_exit ("hostlist_create");
while (npc_gets (fid, buf, sizeof(buf))) {
if ((p = strchr (buf, ' ')))
*p = '\0';
if (!lopt && (p = strchr (buf, '.')))
*p = '\0';
if (!hostlist_push_host (hl, buf))
err_exit ("hostlist_push_host");
}
hostlist_uniq (hl);
if (lopt) {
if (!(itr = hostlist_iterator_create (hl)))
err_exit ("hostlist_iterator_create");
while ((host = hostlist_next (itr)))
printf ("%s\n", host);
hostlist_iterator_destroy (itr);
} else {
char s[1024];
if (hostlist_ranged_string (hl, sizeof (s), s) < 0)
msg_exit ("hostlist output would be too long (use -l)");
printf ("%s\n", s);
}
hostlist_destroy (hl);
if (npc_clunk (fid) < 0)
errn_exit (np_rerror (), "clunk connections");
if (npc_clunk (root) < 0)
errn_exit (np_rerror (), "error clunking ctl");
if (npc_clunk (afid) < 0)
errn_exit (np_rerror (), "error clunking afid");
npc_finish (fs);
exit(0);
}
static void sigalarm (int arg)
{
msg_exit ("timed out");
}
/*
* vi:tabstop=4 shiftwidth=4 expandtab
*/
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