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/*
* $Id: heavy.c,v 1.1 2005/04/19 21:28:36 paul Exp $
*
* This file is part of Quagga.
*
* Quagga 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; either version 2, or (at your option) any
* later version.
*
* Quagga 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 GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Quagga; see the file COPYING. If not, write to the Free
* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
/* This programme shows the effects of 'heavy' long-running functions
* on the cooperative threading model.
*
* Run it with a config file containing 'password whatever', telnet to it
* (it defaults to port 4000) and enter the 'clear foo string' command.
* then type whatever and observe that the vty interface is unresponsive
* for quite a period of time, due to the clear_something command
* taking a very long time to complete.
*/
#include <zebra.h>
#include <lib/version.h>
#include "getopt.h"
#include "thread.h"
#include "vty.h"
#include "command.h"
#include "memory.h"
struct thread_master *master;
struct option longopts[] =
{
{ "daemon", no_argument, NULL, 'd'},
{ "config_file", required_argument, NULL, 'f'},
{ "help", no_argument, NULL, 'h'},
{ "vty_addr", required_argument, NULL, 'A'},
{ "vty_port", required_argument, NULL, 'P'},
{ "version", no_argument, NULL, 'v'},
{ 0 }
};
enum
{
ITERS_FIRST = 0,
ITERS_PRINT = 10,
ITERS_MAX = 1000,
};
static void
slow_func (struct vty *vty, char *str, int i)
{
usleep (10000);
if ((i % ITERS_PRINT) == 0)
printf ("%s did %d%s", str, i, VTY_NEWLINE);
}
static void
clear_something (struct vty *vty, char *str)
{
int i;
/* this could be like iterating through 150k of route_table
* or worse, iterating through a list of peers, each with 150k routes...
*/
for (i = ITERS_FIRST; i < ITERS_MAX; i++)
slow_func (vty, str, i);
XFREE (MTYPE_TMP, str);
}
DEFUN (clear_foo,
clear_foo_cmd,
"clear foo .LINE",
"clear command\n"
"arbitrary string\n")
{
char *str;
if (!argc)
{
vty_out (vty, "%% string argument required%s", VTY_NEWLINE);
return CMD_WARNING;
}
str = argv_concat (argv, argc, 0);
clear_something (vty, str);
return CMD_SUCCESS;
}
static void
slow_vty_init()
{
install_element (VIEW_NODE, &clear_foo_cmd);
}
/* Help information display. */
static void
usage (char *progname, int status)
{
if (status != 0)
fprintf (stderr, "Try `%s --help' for more information.\n", progname);
else
{
printf ("Usage : %s [OPTION...]\n\
Daemon which does 'slow' things.\n\n\
-d, --daemon Runs in daemon mode\n\
-f, --config_file Set configuration file name\n\
-A, --vty_addr Set vty's bind address\n\
-P, --vty_port Set vty's port number\n\
-v, --version Print program version\n\
-h, --help Display this help and exit\n\
\n\
Report bugs to %s\n", progname, ZEBRA_BUG_ADDRESS);
}
exit (status);
}
/* main routine. */
int
main (int argc, char **argv)
{
char *p;
char *vty_addr = NULL;
int vty_port = 4000;
int daemon_mode = 0;
char *progname;
struct thread thread;
char *config_file = NULL;
/* Set umask before anything for security */
umask (0027);
/* get program name */
progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]);
/* master init. */
master = thread_master_create ();
while (1)
{
int opt;
opt = getopt_long (argc, argv, "dhf:A:P:v", longopts, 0);
if (opt == EOF)
break;
switch (opt)
{
case 0:
break;
case 'f':
config_file = optarg;
break;
case 'd':
daemon_mode = 1;
break;
case 'A':
vty_addr = optarg;
break;
case 'P':
/* Deal with atoi() returning 0 on failure */
if (strcmp(optarg, "0") == 0)
{
vty_port = 0;
break;
}
vty_port = atoi (optarg);
vty_port = (vty_port ? vty_port : 4000);
break;
case 'v':
print_version (progname);
exit (0);
break;
case 'h':
usage (progname, 0);
break;
default:
usage (progname, 1);
break;
}
}
/* Library inits. */
cmd_init (1);
vty_init (master);
memory_init ();
/* OSPF vty inits. */
slow_vty_init ();
sort_node ();
/* Change to the daemon program. */
if (daemon_mode)
daemon (0, 0);
/* Create VTY socket */
vty_serv_sock (vty_addr, vty_port, "/tmp/.heavy.sock");
/* Configuration file read*/
if (!config_file)
usage (progname, 1);
vty_read_config (config_file, NULL);
/* Fetch next active thread. */
while (thread_fetch (master, &thread))
thread_call (&thread);
/* Not reached. */
exit (0);
}
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