/*
* Copyright (c) 2013-2014, Christian Ferrari <tiian@users.sourceforge.net>
* All rights reserved.
*
* This file is part of FLOM.
*
* FLOM is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*
* FLOM 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 FLOM. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#ifdef HAVE_STDIO_H
# include <stdio.h>
#endif
#ifdef HAVE_GLIB_H
# include <glib.h>
#endif
#define FLOM_TRACE_MODULE FLOM_TRACE_MOD_GENERIC
#include "flom_config.h"
#include "flom_client.h"
#include "flom_conns.h"
#include "flom_errors.h"
#include "flom_exec.h"
#include "flom_rsrc.h"
#include "flom_trace.h"
static gboolean print_version = FALSE;
static gboolean verbose = FALSE;
static char *config_file = NULL;
static gchar *socket_name = NULL;
static gchar *resource_name = NULL;
static gchar *resource_wait = NULL;
static gint resource_timeout = FLOM_NETWORK_WAIT_TIMEOUT;
static gchar *lock_mode = NULL;
static gint daemon_lifespan = _DEFAULT_DAEMON_LIFESPAN;
static gchar *unicast_address = NULL;
static gint unicast_port = _DEFAULT_DAEMON_PORT;
static gchar *multicast_address = NULL;
static gint multicast_port = _DEFAULT_DAEMON_PORT;
static gint discovery_attempts = _DEFAULT_DISCOVERY_ATTEMPTS;
static gint discovery_timeout = _DEFAULT_DISCOVERY_TIMEOUT;
static gint discovery_ttl = _DEFAULT_DISCOVERY_TTL;
static gint tcp_keepalive_time = _DEFAULT_TCP_KEEPALIVE_TIME;
static gint tcp_keepalive_intvl = _DEFAULT_TCP_KEEPALIVE_INTVL;
static gint tcp_keepalive_probes = _DEFAULT_TCP_KEEPALIVE_PROBES;
static gchar *command_trace_file = NULL;
static gchar *daemon_trace_file = NULL;
static gchar **command_argv = NULL;
/* command line options */
static GOptionEntry entries[] =
{
{ "version", 'v', 0, G_OPTION_ARG_NONE, &print_version, "Print package info and exit", NULL },
{ "verbose", 'V', 0, G_OPTION_ARG_NONE, &verbose, "Activate verbose messages", NULL },
{ "config-file", 'c', 0, G_OPTION_ARG_STRING, &config_file, "User configuration file name", NULL },
{ "resource-name", 'r', 0, G_OPTION_ARG_STRING, &resource_name, "Specify the name of the resource to be locked", NULL },
{ "resource-wait", 'w', 0, G_OPTION_ARG_STRING, &resource_wait, "Specify if the command enques when the resource is already locked (accepted values 'yes', 'no')", NULL },
{ "resource-timeout", 'o', 0, G_OPTION_ARG_INT, &resource_timeout, "Specify maximum wait time (milliseconds) if a resource is already locked", NULL },
{ "lock-mode", 'l', 0, G_OPTION_ARG_STRING, &lock_mode, "Resource lock mode ('NL', 'CR', 'CW', 'PR', 'PW', 'EX')", NULL },
{ "socket-name", 's', 0, G_OPTION_ARG_STRING, &socket_name, "Daemon/command communication socket name", NULL },
{ "daemon-lifespan", 'd', 0, G_OPTION_ARG_INT, &daemon_lifespan, "Specify minimum lifespan of the flom daemon (if activated)", NULL },
{ "unicast-address", 'a', 0, G_OPTION_ARG_STRING, &unicast_address, "Daemon TCP/IP address", NULL },
{ "unicast-port", 'p', 0, G_OPTION_ARG_INT, &unicast_port, "Daemon TCP/IP port", NULL },
{ "multicast-address", 'A', 0, G_OPTION_ARG_STRING, &multicast_address, "Daemon UDP/IP (multicast) address", NULL },
{ "multicast-port", 'P', 0, G_OPTION_ARG_INT, &multicast_port, "Daemon UDP/IP (multicast) port", NULL },
{ "discovery-attempts", 'D', 0, G_OPTION_ARG_INT, &discovery_attempts, "UDP/IP (multicast) max number of requests", NULL },
{ "discovery-timeout", 'I', 0, G_OPTION_ARG_INT, &discovery_timeout, "UDP/IP (multicast) request timeout", NULL },
{ "discovery-ttl", 0, 0, G_OPTION_ARG_INT, &discovery_ttl, "UDP/IP (multicast) hop limit", NULL },
{ "tcp-keepalive-time", 0, 0, G_OPTION_ARG_INT, &tcp_keepalive_time, "Local override for SO_KEEPALIVE feature", NULL },
{ "tcp-keepalive-intvl", 0, 0, G_OPTION_ARG_INT, &tcp_keepalive_intvl, "Local override for SO_KEEPALIVE feature", NULL },
{ "tcp-keepalive-probes", 0, 0, G_OPTION_ARG_INT, &tcp_keepalive_probes, "Local override for SO_KEEPALIVE feature", NULL },
{ "daemon-trace-file", 't', 0, G_OPTION_ARG_STRING, &daemon_trace_file, "Specify daemon (background process) trace file name (absolute path required)", NULL },
{ "command-trace-file", 'T', 0, G_OPTION_ARG_STRING, &command_trace_file, "Specify command (foreground process) trace file name (absolute path required)", NULL },
{ G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_STRING_ARRAY, &command_argv, "Command must be executed under flom control" },
{ NULL }
};
int main (int argc, char *argv[])
{
GError *error = NULL;
GOptionContext *option_context;
int child_status = 0;
int ret_cod = FLOM_RC_INTERNAL_ERROR;
struct flom_conn_data_s cd;
option_context = g_option_context_new("-- command to execute");
g_option_context_add_main_entries(option_context, entries, NULL);
if (!g_option_context_parse(option_context, &argc, &argv, &error)) {
g_print("option parsing failed: %s\n", error->message);
exit(FLOM_ES_GENERIC_ERROR);
}
g_option_context_free(option_context);
if (print_version) {
g_print("FLOM: Free LOck Manager\n"
"Copyright (c) 2013-2014, Christian Ferrari; "
"all rights reserved.\n"
"License: GPL (GNU Public License) version 2\n"
"Package name: %s; package version: %s; release date: %s\n"
"Access http://sourceforge.net/projects/flom/ for "
"project community activities\n",
FLOM_PACKAGE_NAME, FLOM_PACKAGE_VERSION, FLOM_PACKAGE_DATE);
exit(FLOM_ES_OK);
}
/* initialize trace destination if necessary */
FLOM_TRACE_INIT;
/* initialize regular expression table */
if (FLOM_RC_OK != (ret_cod = global_res_name_preg_init())) {
g_print("global_res_name_preg_init: ret_cod=%d\n", ret_cod);
exit(FLOM_ES_GENERIC_ERROR);
}
/* reset global configuration */
flom_config_reset();
/* initialize configuration with standard system, statndard user and
user customized config files */
if (FLOM_RC_OK != (ret_cod = flom_config_init(config_file))) {
g_print("flom_config_init: ret_cod=%d\n", ret_cod);
exit(FLOM_ES_GENERIC_ERROR);
}
/* overrides configuration with command line passed arguments */
if (NULL != daemon_trace_file)
flom_config_set_daemon_trace_file(daemon_trace_file);
if (NULL != command_trace_file)
flom_config_set_command_trace_file(command_trace_file);
if (verbose)
flom_config_set_verbose(verbose);
if (NULL != resource_name)
if (FLOM_RC_OK != (ret_cod = flom_config_set_resource_name(
resource_name))) {
g_print("flom_config_set_resource_name: ret_cod=%d\n", ret_cod);
exit(FLOM_ES_GENERIC_ERROR);
}
if (NULL != resource_wait) {
flom_bool_value_t fbv;
if (FLOM_BOOL_INVALID == (
fbv = flom_bool_value_retrieve(resource_wait))) {
g_print("resource-wait: '%s' is an invalid value\n",
resource_wait);
exit(FLOM_ES_GENERIC_ERROR);
}
flom_config_set_resource_wait(fbv);
}
if (FLOM_NETWORK_WAIT_TIMEOUT != resource_timeout) {
/* timeout is useless if no wait was specified */
if (FLOM_BOOL_NO == flom_config_get_resource_wait())
g_warning("Timeout ignored because 'no wait' behavior was "
"specified\n");
else
flom_config_set_resource_timeout(resource_timeout);
}
if (NULL != lock_mode) {
flom_lock_mode_t flm;
if (FLOM_LOCK_MODE_INVALID == (
flm = flom_lock_mode_retrieve(lock_mode))) {
g_print("lock-mode: '%s' is an invalid value\n", lock_mode);
exit(FLOM_ES_GENERIC_ERROR);
}
flom_config_set_lock_mode(flm);
}
if (NULL != socket_name) {
if (FLOM_RC_OK != (ret_cod = flom_config_set_socket_name(
socket_name))) {
g_print("socket-name: '%s' is an invalid value\n", socket_name);
g_print("flom_client_connect: ret_cod=%d (%s)\n",
ret_cod, flom_strerror(ret_cod));
exit(FLOM_ES_GENERIC_ERROR);
}
}
if (_DEFAULT_DAEMON_LIFESPAN != daemon_lifespan) {
flom_config_set_lifespan(daemon_lifespan);
}
if (NULL != unicast_address) {
flom_config_set_unicast_address(unicast_address);
}
if (_DEFAULT_DAEMON_PORT != unicast_port) {
flom_config_set_unicast_port(unicast_port);
}
if (NULL != multicast_address) {
flom_config_set_multicast_address(multicast_address);
}
if (_DEFAULT_DAEMON_PORT != multicast_port) {
flom_config_set_multicast_port(multicast_port);
}
if (_DEFAULT_DISCOVERY_ATTEMPTS != discovery_attempts) {
flom_config_set_discovery_attempts(discovery_attempts);
}
if (_DEFAULT_DISCOVERY_TIMEOUT != discovery_timeout) {
flom_config_set_discovery_timeout(discovery_timeout);
}
if (_DEFAULT_DISCOVERY_TTL != discovery_ttl) {
flom_config_set_discovery_ttl(discovery_ttl);
}
if (_DEFAULT_TCP_KEEPALIVE_TIME != tcp_keepalive_time) {
flom_config_set_tcp_keepalive_time(tcp_keepalive_time);
}
if (_DEFAULT_TCP_KEEPALIVE_INTVL != tcp_keepalive_intvl) {
flom_config_set_tcp_keepalive_intvl(tcp_keepalive_intvl);
}
if (_DEFAULT_TCP_KEEPALIVE_PROBES != tcp_keepalive_probes) {
flom_config_set_tcp_keepalive_probes(tcp_keepalive_probes);
}
if (NULL != flom_config_get_command_trace_file())
/* change trace destination if necessary */
FLOM_TRACE_REOPEN(flom_config_get_command_trace_file());
/* print configuration */
if (flom_config_get_verbose())
flom_config_print();
/* check configuration */
if (FLOM_RC_OK != (ret_cod = flom_config_check())) {
g_warning("Configuration is not valid, cannot go on!\n");
exit(FLOM_ES_GENERIC_ERROR);
}
/* check the command is not null */
if (NULL == command_argv) {
g_warning("No command to execute!\n");
exit(FLOM_ES_UNABLE_TO_EXECUTE_COMMAND);
}
/* open connection to a valid flom lock manager... */
if (FLOM_RC_OK != (ret_cod = flom_client_connect(&cd))) {
g_print("flom_client_connect: ret_cod=%d (%s)\n",
ret_cod, flom_strerror(ret_cod));
exit(FLOM_ES_GENERIC_ERROR);
}
/* sending lock command */
ret_cod = flom_client_lock(&cd, flom_config_get_resource_timeout());
switch (ret_cod) {
case FLOM_RC_OK: /* OK, go on */
break;
case FLOM_RC_LOCK_BUSY: /* busy */
g_print("Resource already locked, the lock cannot be obtained\n");
/* gracefully disconnect from daemon */
if (FLOM_RC_OK != (ret_cod = flom_client_disconnect(&cd))) {
g_print("flom_client_unlock: ret_cod=%d (%s)\n",
ret_cod, flom_strerror(ret_cod));
}
exit(FLOM_ES_RESOURCE_BUSY);
break;
case FLOM_RC_NETWORK_TIMEOUT: /* timeout expired, busy resource */
g_print("Resource already locked, the lock was not obtained "
"because timeout (%d milliseconds) expired\n",
flom_config_get_resource_timeout());
/* gracefully disconnect from daemon */
if (FLOM_RC_OK != (ret_cod = flom_client_disconnect(&cd))) {
g_print("flom_client_unlock: ret_cod=%d (%s)\n",
ret_cod, flom_strerror(ret_cod));
}
exit(FLOM_ES_RESOURCE_BUSY);
break;
default:
g_print("flom_client_lock: ret_cod=%d (%s)\n",
ret_cod, flom_strerror(ret_cod));
exit(FLOM_ES_GENERIC_ERROR);
} /* switch (ret_cod) */
/* execute the command */
if (FLOM_RC_OK != (ret_cod = flom_exec(command_argv, &child_status))) {
guint i, num;
g_print("Unable to execute command: '");
num = g_strv_length(command_argv);
for (i=0; i<num; ++i)
g_print("%s", command_argv[i]);
g_print("'\n");
exit(FLOM_ES_UNABLE_TO_EXECUTE_COMMAND);
}
/* sending unlock command */
if (FLOM_RC_OK != (ret_cod = flom_client_unlock(&cd))) {
g_print("flom_client_unlock: ret_cod=%d (%s)\n",
ret_cod, flom_strerror(ret_cod));
exit(FLOM_ES_GENERIC_ERROR);
}
/* gracefully disconnect from daemon */
if (FLOM_RC_OK != (ret_cod = flom_client_disconnect(&cd))) {
g_print("flom_client_unlock: ret_cod=%d (%s)\n",
ret_cod, flom_strerror(ret_cod));
}
g_strfreev (command_argv);
command_argv = NULL;
/* release config data */
flom_config_free();
/* release regular expression data */
global_res_name_preg_free();
return child_status;
}