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/*
* lxc: linux Container library
*
* (C) Copyright IBM Corp. 2007, 2008
*
* Authors:
* Daniel Lezcano <dlezcano at fr.ibm.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdio.h>
#include <string.h>
#include <libgen.h>
#include <unistd.h>
#include <sys/types.h>
#include <lxc/lxc.h>
#include <lxc/log.h>
#include <lxc/monitor.h>
#include "arguments.h"
lxc_log_define(lxc_wait, lxc);
static int my_checker(const struct lxc_arguments* args)
{
if (!args->states) {
lxc_error(args, "missing state option to wait for.");
return -1;
}
return 0;
}
static int my_parser(struct lxc_arguments* args, int c, char* arg)
{
switch (c) {
case 's': args->states = optarg; break;
}
return 0;
}
static const struct option my_longopts[] = {
{"state", required_argument, 0, 's'},
LXC_COMMON_OPTIONS
};
static struct lxc_arguments my_args = {
.progname = "lxc-wait",
.help = "\
--name=NAME --state=STATE\n\
\n\
lxc-wait waits for NAME container state to reach STATE\n\
\n\
Options :\n\
-n, --name=NAME NAME for name of the container\n\
-s, --state=STATE ORed states to wait for\n\
STOPPED, STARTING, RUNNING, STOPPING,\n\
ABORTING, FREEZING, FROZEN\n",
.options = my_longopts,
.parser = my_parser,
.checker = my_checker,
};
static int fillwaitedstates(char *strstates, int *states)
{
char *token, *saveptr = NULL;
int state;
token = strtok_r(strstates, "|", &saveptr);
while (token) {
state = lxc_str2state(token);
if (state < 0)
return -1;
states[state] = 1;
token = strtok_r(NULL, "|", &saveptr);
}
return 0;
}
int main(int argc, char *argv[])
{
struct lxc_msg msg;
int s[MAX_STATE] = { }, fd;
int state, ret;
if (lxc_arguments_parse(&my_args, argc, argv))
return -1;
if (lxc_log_init(my_args.log_file, my_args.log_priority,
my_args.progname, my_args.quiet))
return -1;
if (fillwaitedstates(my_args.states, s))
return -1;
fd = lxc_monitor_open();
if (fd < 0)
return -1;
/*
* if container present,
* then check if already in requested state
*/
ret = -1;
state = lxc_getstate(my_args.name);
if (state < 0) {
goto out_close;
} else if ((state >= 0) && (s[state])) {
ret = 0;
goto out_close;
}
for (;;) {
if (lxc_monitor_read(fd, &msg) < 0)
goto out_close;
if (strcmp(my_args.name, msg.name))
continue;
switch (msg.type) {
case lxc_msg_state:
if (msg.value < 0 || msg.value >= MAX_STATE) {
ERROR("Receive an invalid state number '%d'",
msg.value);
goto out_close;
}
if (s[msg.value]) {
ret = 0;
goto out_close;
}
break;
default:
/* just ignore garbage */
break;
}
}
out_close:
lxc_monitor_close(fd);
return ret;
}
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