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/*
* config.c - Functions to parse the config file
* Copyright (C) 2ndQuadrant, 2010-2011
*
* 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, either version 3 of the License, or
* (at your option) any later version.
*
* 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
* 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, see <http://www.gnu.org/licenses/>.
*
*/
#include "config.h"
#include "log.h"
#include "strutil.h"
#include "repmgr.h"
void
parse_config(const char *config_file, t_configuration_options *options)
{
char *s, buff[MAXLINELENGTH];
char name[MAXLEN];
char value[MAXLEN];
FILE *fp = fopen (config_file, "r");
/* Initialize */
memset(options->cluster_name, 0, sizeof(options->cluster_name));
options->node = -1;
memset(options->conninfo, 0, sizeof(options->conninfo));
options->failover = MANUAL_FAILOVER;
options->priority = 0;
memset(options->promote_command, 0, sizeof(options->promote_command));
memset(options->follow_command, 0, sizeof(options->follow_command));
memset(options->rsync_options, 0, sizeof(options->rsync_options));
/*
* Since some commands don't require a config file at all, not
* having one isn't necessarily a problem.
*/
if (fp == NULL)
{
log_err(_("Did not find the configuration file '%s', continuing\n"), config_file);
return;
}
/* Read next line */
while ((s = fgets (buff, sizeof buff, fp)) != NULL)
{
/* Skip blank lines and comments */
if (buff[0] == '\n' || buff[0] == '#')
continue;
/* Parse name/value pair from line */
parse_line(buff, name, value);
/* Copy into correct entry in parameters struct */
if (strcmp(name, "cluster") == 0)
strncpy (options->cluster_name, value, MAXLEN);
else if (strcmp(name, "node") == 0)
options->node = atoi(value);
else if (strcmp(name, "conninfo") == 0)
strncpy (options->conninfo, value, MAXLEN);
else if (strcmp(name, "rsync_options") == 0)
strncpy (options->rsync_options, value, QUERY_STR_LEN);
else if (strcmp(name, "loglevel") == 0)
strncpy (options->loglevel, value, MAXLEN);
else if (strcmp(name, "logfacility") == 0)
strncpy (options->logfacility, value, MAXLEN);
else if (strcmp(name, "failover") == 0)
{
char failoverstr[MAXLEN];
strncpy(failoverstr, value, MAXLEN);
if (strcmp(failoverstr, "manual") == 0)
options->failover = MANUAL_FAILOVER;
else if (strcmp(failoverstr, "automatic") == 0)
options->failover = AUTOMATIC_FAILOVER;
else
{
log_warning(_("value for failover option is incorrect, it should be automatic or manual. Defaulting to manual.\n"));
options->failover = MANUAL_FAILOVER;
}
}
else if (strcmp(name, "priority") == 0)
options->priority = atoi(value);
else if (strcmp(name, "promote_command") == 0)
strncpy(options->promote_command, value, MAXLEN);
else if (strcmp(name, "follow_command") == 0)
strncpy(options->follow_command, value, MAXLEN);
else
log_warning(_("%s/%s: Unknown name/value pair!\n"), name, value);
}
/* Close file */
fclose (fp);
/* Check config settings */
if (strnlen(options->cluster_name, MAXLEN)==0)
{
log_err(_("Cluster name is missing. Check the configuration file.\n"));
exit(ERR_BAD_CONFIG);
}
if (options->node == -1)
{
log_err(_("Node information is missing. Check the configuration file.\n"));
exit(ERR_BAD_CONFIG);
}
}
char *
trim (char *s)
{
/* Initialize start, end pointers */
char *s1 = s, *s2 = &s[strlen (s) - 1];
/* Trim and delimit right side */
while ( (isspace (*s2)) && (s2 >= s1) )
--s2;
*(s2+1) = '\0';
/* Trim left side */
while ( (isspace (*s1)) && (s1 < s2) )
++s1;
/* Copy finished string */
strcpy (s, s1);
return s;
}
void
parse_line(char *buff, char *name, char *value)
{
int i = 0;
int j = 0;
/*
* first we find the name of the parameter
*/
for ( ; i < MAXLEN; ++i)
{
if (buff[i] != '=')
name[j++] = buff[i];
else
break;
}
name[j] = '\0';
/*
* Now the value
*/
j = 0;
for ( ++i ; i < MAXLEN; ++i)
if (buff[i] == '\'')
continue;
else if (buff[i] != '\n')
value[j++] = buff[i];
else
break;
value[j] = '\0';
trim(value);
}
bool
reload_configuration(char *config_file, t_configuration_options *orig_options)
{
PGconn *conn;
t_configuration_options new_options;
/*
* Re-read the configuration file: repmgr.conf
*/
log_info(_("Reloading configuration file and updating repmgr tables\n"));
parse_config(config_file, &new_options);
if (new_options.node == -1)
{
log_warning(_("\nCannot load new configuration, will keep current one.\n"));
return false;
}
if (strcmp(new_options.cluster_name, orig_options->cluster_name) != 0)
{
log_warning(_("\nCannot change cluster name, will keep current configuration.\n"));
return false;
}
if (new_options.node != orig_options->node)
{
log_warning(_("\nCannot change node number, will keep current configuration.\n"));
return false;
}
if (new_options.failover != MANUAL_FAILOVER && new_options.failover != AUTOMATIC_FAILOVER)
{
log_warning(_("\nNew value for failover is not valid. Should be MANUAL or AUTOMATIC.\n"));
return false;
}
/* Test conninfo string */
conn = establishDBConnection(new_options.conninfo, false);
if (!conn || (PQstatus(conn) != CONNECTION_OK))
{
log_warning(_("\nconninfo string is not valid, will keep current configuration.\n"));
return false;
}
PQfinish(conn);
/* Configuration seems ok, will load new values */
strcpy(orig_options->cluster_name, new_options.cluster_name);
orig_options->node = new_options.node;
strcpy(orig_options->conninfo, new_options.conninfo);
orig_options->failover = new_options.failover;
orig_options->priority = new_options.priority;
strcpy(orig_options->promote_command, new_options.promote_command);
strcpy(orig_options->follow_command, new_options.follow_command);
strcpy(orig_options->rsync_options, new_options.rsync_options);
/*
* XXX These ones can change with a simple SIGHUP?
strcpy (orig_options->loglevel, new_options.loglevel);
strcpy (orig_options->logfacility, new_options.logfacility);
logger_shutdown();
XXX do we have progname here ?
logger_init(progname, orig_options.loglevel, orig_options.logfacility);
*/
return true;
}