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config.c
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config.c
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/*
* config.c - Functions to parse the config file
*
* Copyright (c) 2ndQuadrant, 2010-2017
*
* 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 <sys/stat.h> /* for stat() */
#include "config.h"
#include "log.h"
#include "strutil.h"
#include "repmgr.h"
static void parse_event_notifications_list(t_configuration_options *options, const char *arg);
static void tablespace_list_append(t_configuration_options *options, const char *arg);
static void exit_with_errors(ItemList *config_errors);
const static char *_progname = NULL;
static char config_file_path[MAXPGPATH];
static bool config_file_provided = false;
bool config_file_found = false;
void
set_progname(const char *argv0)
{
_progname = get_progname(argv0);
}
const char *
progname(void)
{
return _progname;
}
/*
* load_config()
*
* Set default options and overwrite with values from provided configuration
* file.
*
* Returns true if a configuration file could be parsed, otherwise false.
*
* Any *repmgrd-specific* configuration options added/changed in this function must also be
* added/changed in reload_config()
*
* NOTE: this function is called before the logger is set up, so we need
* to handle the verbose option ourselves; also the default log level is NOTICE,
* so we can't use DEBUG.
*/
bool
load_config(const char *config_file, bool verbose, t_configuration_options *options, char *argv0)
{
struct stat stat_config;
/*
* If a configuration file was provided, check it exists, otherwise
* emit an error and terminate. We assume that if a user explicitly
* provides a configuration file, they'll want to make sure it's
* used and not fall back to any of the defaults.
*/
if (config_file[0])
{
strncpy(config_file_path, config_file, MAXPGPATH);
canonicalize_path(config_file_path);
if (stat(config_file_path, &stat_config) != 0)
{
log_err(_("provided configuration file \"%s\" not found: %s\n"),
config_file,
strerror(errno)
);
exit(ERR_BAD_CONFIG);
}
if (verbose == true)
{
log_notice(_("using configuration file \"%s\"\n"), config_file);
}
config_file_provided = true;
config_file_found = true;
}
/*
* If no configuration file was provided, attempt to find a default file
* in this order:
* - current directory
* - /etc/repmgr.conf
* - default sysconfdir
*
* here we just check for the existence of the file; parse_config()
* will handle read errors etc.
*/
if (config_file_provided == false)
{
char my_exec_path[MAXPGPATH];
char sysconf_etc_path[MAXPGPATH];
/* 1. "./repmgr.conf" */
if (verbose == true)
{
log_notice(_("looking for configuration file in current directory\n"));
}
snprintf(config_file_path, MAXPGPATH, "./%s", CONFIG_FILE_NAME);
canonicalize_path(config_file_path);
if (stat(config_file_path, &stat_config) == 0)
{
config_file_found = true;
goto end_search;
}
/* 2. "/etc/repmgr.conf" */
if (verbose == true)
{
log_notice(_("looking for configuration file in /etc\n"));
}
snprintf(config_file_path, MAXPGPATH, "/etc/%s", CONFIG_FILE_NAME);
if (stat(config_file_path, &stat_config) == 0)
{
config_file_found = true;
goto end_search;
}
/* 3. default sysconfdir */
if (find_my_exec(argv0, my_exec_path) < 0)
{
fprintf(stderr, _("%s: could not find own program executable\n"), argv0);
exit(EXIT_FAILURE);
}
get_etc_path(my_exec_path, sysconf_etc_path);
if (verbose == true)
{
log_notice(_("looking for configuration file in %s\n"), sysconf_etc_path);
}
snprintf(config_file_path, MAXPGPATH, "%s/%s", sysconf_etc_path, CONFIG_FILE_NAME);
if (stat(config_file_path, &stat_config) == 0)
{
config_file_found = true;
goto end_search;
}
end_search:
if (config_file_found == true)
{
if (verbose == true)
{
log_notice(_("configuration file found at: %s\n"), config_file_path);
}
}
else
{
if (verbose == true)
{
log_notice(_("no configuration file provided or found\n"));
}
}
}
return parse_config(options);
}
bool
parse_config(t_configuration_options *options)
{
/* Collate configuration file errors here for friendlier reporting */
static ItemList config_errors = { NULL, NULL };
_parse_config(options, &config_errors);
if (config_errors.head != NULL)
{
exit_with_errors(&config_errors);
}
return true;
}
/*
* Parse configuration file; if any errors are encountered,
* list them and exit.
*
* Ensure any default values set here are synced with repmgr.conf.sample
* and any other documentation.
*/
void
_parse_config(t_configuration_options *options, ItemList *error_list)
{
FILE *fp;
char *s,
buf[MAXLINELENGTH];
char name[MAXLEN];
char value[MAXLEN];
/* For sanity-checking provided conninfo string */
PQconninfoOption *conninfo_options;
char *conninfo_errmsg = NULL;
bool node_found = false;
/* Initialize configuration options with sensible defaults
* note: the default log level is set in log.c and does not need
* to be initialised here
*/
memset(options->cluster_name, 0, sizeof(options->cluster_name));
options->node = UNKNOWN_NODE_ID;
options->upstream_node = NO_UPSTREAM_NODE;
options->use_replication_slots = 0;
memset(options->conninfo, 0, sizeof(options->conninfo));
memset(options->barman_server, 0, sizeof(options->barman_server));
memset(options->barman_config, 0, sizeof(options->barman_config));
options->failover = MANUAL_FAILOVER;
options->priority = DEFAULT_PRIORITY;
memset(options->node_name, 0, sizeof(options->node_name));
memset(options->promote_command, 0, sizeof(options->promote_command));
memset(options->follow_command, 0, sizeof(options->follow_command));
memset(options->service_stop_command, 0, sizeof(options->service_stop_command));
memset(options->service_start_command, 0, sizeof(options->service_start_command));
memset(options->service_restart_command, 0, sizeof(options->service_restart_command));
memset(options->service_reload_command, 0, sizeof(options->service_reload_command));
memset(options->service_promote_command, 0, sizeof(options->service_promote_command));
memset(options->rsync_options, 0, sizeof(options->rsync_options));
memset(options->ssh_options, 0, sizeof(options->ssh_options));
memset(options->pg_bindir, 0, sizeof(options->pg_bindir));
memset(options->pg_ctl_options, 0, sizeof(options->pg_ctl_options));
memset(options->pg_basebackup_options, 0, sizeof(options->pg_basebackup_options));
memset(options->restore_command, 0, sizeof(options->restore_command));
/* default master_response_timeout is 60 seconds */
options->master_response_timeout = 60;
/* default to 6 reconnection attempts at intervals of 10 seconds */
options->reconnect_attempts = 6;
options->reconnect_interval = 10;
options->monitor_interval_secs = 2;
options->retry_promote_interval_secs = 300;
/* default to resyncing repl_nodes table every 30 seconds on the witness server */
options->witness_repl_nodes_sync_interval_secs = 30;
memset(options->event_notification_command, 0, sizeof(options->event_notification_command));
options->event_notifications.head = NULL;
options->event_notifications.tail = NULL;
options->tablespace_mapping.head = NULL;
options->tablespace_mapping.tail = NULL;
/*
* If no configuration file available (user didn't specify and none found
* in the default locations), return with default values
*/
if (config_file_found == false)
{
log_verbose(LOG_NOTICE, _("no configuration file provided and no default file found - "
"continuing with default values\n"));
return;
}
fp = fopen(config_file_path, "r");
/*
* A configuration file has been found, either provided by the user
* or found in one of the default locations. If we can't open it,
* fail with an error.
*/
if (fp == NULL)
{
if (config_file_provided)
{
log_err(_("unable to open provided configuration file \"%s\"; terminating\n"), config_file_path);
}
else
{
log_err(_("unable to open default configuration file \"%s\"; terminating\n"), config_file_path);
}
exit(ERR_BAD_CONFIG);
}
/* Read file */
while ((s = fgets(buf, sizeof buf, fp)) != NULL)
{
bool known_parameter = true;
/* Parse name/value pair from line */
parse_line(buf, name, value);
/* Skip blank lines */
if (!strlen(name))
continue;
/* Skip comments */
if (name[0] == '#')
continue;
/* 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 = repmgr_atoi(value, "node", error_list, false);
node_found = true;
}
else if (strcmp(name, "upstream_node") == 0)
options->upstream_node = repmgr_atoi(value, "upstream_node", error_list, false);
else if (strcmp(name, "conninfo") == 0)
strncpy(options->conninfo, value, MAXLEN);
else if (strcmp(name, "barman_server") == 0)
strncpy(options->barman_server, value, MAXLEN);
else if (strcmp(name, "barman_config") == 0)
strncpy(options->barman_config, value, MAXLEN);
else if (strcmp(name, "rsync_options") == 0)
strncpy(options->rsync_options, value, QUERY_STR_LEN);
else if (strcmp(name, "ssh_options") == 0)
strncpy(options->ssh_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
{
item_list_append(error_list, _("value for 'failover' must be 'automatic' or 'manual'\n"));
}
}
else if (strcmp(name, "priority") == 0)
options->priority = repmgr_atoi(value, "priority", error_list, true);
else if (strcmp(name, "node_name") == 0)
strncpy(options->node_name, value, MAXLEN);
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 if (strcmp(name, "service_stop_command") == 0)
strncpy(options->service_stop_command, value, MAXLEN);
else if (strcmp(name, "service_start_command") == 0)
strncpy(options->service_start_command, value, MAXLEN);
else if (strcmp(name, "service_restart_command") == 0)
strncpy(options->service_restart_command, value, MAXLEN);
else if (strcmp(name, "service_reload_command") == 0)
strncpy(options->service_reload_command, value, MAXLEN);
else if (strcmp(name, "service_promote_command") == 0)
strncpy(options->service_promote_command, value, MAXLEN);
else if (strcmp(name, "master_response_timeout") == 0)
options->master_response_timeout = repmgr_atoi(value, "master_response_timeout", error_list, false);
/*
* 'primary_response_timeout' as synonym for 'master_response_timeout' -
* we'll switch terminology in a future release (3.1?)
*/
else if (strcmp(name, "primary_response_timeout") == 0)
options->master_response_timeout = repmgr_atoi(value, "primary_response_timeout", error_list, false);
else if (strcmp(name, "reconnect_attempts") == 0)
options->reconnect_attempts = repmgr_atoi(value, "reconnect_attempts", error_list, false);
else if (strcmp(name, "reconnect_interval") == 0)
options->reconnect_interval = repmgr_atoi(value, "reconnect_interval", error_list, false);
else if (strcmp(name, "pg_bindir") == 0)
strncpy(options->pg_bindir, value, MAXLEN);
else if (strcmp(name, "pg_ctl_options") == 0)
strncpy(options->pg_ctl_options, value, MAXLEN);
else if (strcmp(name, "pg_basebackup_options") == 0)
strncpy(options->pg_basebackup_options, value, MAXLEN);
else if (strcmp(name, "logfile") == 0)
strncpy(options->logfile, value, MAXLEN);
else if (strcmp(name, "monitor_interval_secs") == 0)
options->monitor_interval_secs = repmgr_atoi(value, "monitor_interval_secs", error_list, false);
else if (strcmp(name, "retry_promote_interval_secs") == 0)
options->retry_promote_interval_secs = repmgr_atoi(value, "retry_promote_interval_secs", error_list, false);
else if (strcmp(name, "witness_repl_nodes_sync_interval_secs") == 0)
options->witness_repl_nodes_sync_interval_secs = repmgr_atoi(value, "witness_repl_nodes_sync_interval_secs", error_list, false);
else if (strcmp(name, "use_replication_slots") == 0)
/* XXX we should have a dedicated boolean argument format */
options->use_replication_slots = repmgr_atoi(value, "use_replication_slots", error_list, false);
else if (strcmp(name, "event_notification_command") == 0)
strncpy(options->event_notification_command, value, MAXLEN);
else if (strcmp(name, "event_notifications") == 0)
parse_event_notifications_list(options, value);
else if (strcmp(name, "tablespace_mapping") == 0)
tablespace_list_append(options, value);
else if (strcmp(name, "restore_command") == 0)
strncpy(options->restore_command, value, MAXLEN);
else
{
known_parameter = false;
log_warning(_("%s/%s: unknown name/value pair provided; ignoring\n"), name, value);
}
/*
* Raise an error if a known parameter is provided with an empty value.
* Currently there's no reason why empty parameters are needed; if
* we want to accept those, we'd need to add stricter default checking,
* as currently e.g. an empty `node` value will be converted to '0'.
*/
if (known_parameter == true && !strlen(value)) {
char error_message_buf[MAXLEN] = "";
snprintf(error_message_buf,
MAXLEN,
_("no value provided for parameter \"%s\""),
name);
item_list_append(error_list, error_message_buf);
}
}
fclose(fp);
if (node_found == false)
{
item_list_append(error_list, _("\"node\": parameter was not found"));
}
else if (options->node == 0)
{
item_list_append(error_list, _("\"node\": must be greater than zero"));
}
else if (options->node < 0)
{
item_list_append(error_list, _("\"node\": must be a positive signed 32 bit integer, i.e. 2147483647 or less"));
}
if (strlen(options->conninfo))
{
/* Sanity check the provided conninfo string
*
* NOTE: PQconninfoParse() verifies the string format and checks for valid options
* but does not sanity check values
*/
conninfo_options = PQconninfoParse(options->conninfo, &conninfo_errmsg);
if (conninfo_options == NULL)
{
char error_message_buf[MAXLEN] = "";
snprintf(error_message_buf,
MAXLEN,
_("\"conninfo\": %s"),
conninfo_errmsg);
item_list_append(error_list, error_message_buf);
}
PQconninfoFree(conninfo_options);
}
}
char *
trim(char *s)
{
/* Initialize start, end pointers */
char *s1 = s,
*s2 = &s[strlen(s) - 1];
/* If string is empty, no action needed */
if (s2 < s1)
return s;
/* 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 */
memmove(s, s1, s2 - s1);
s[s2 - s1 + 1] = '\0';
return s;
}
void
parse_line(char *buf, char *name, char *value)
{
int i = 0;
int j = 0;
/*
* Extract parameter name, if present
*/
for (; i < MAXLEN; ++i)
{
if (buf[i] == '=')
break;
switch(buf[i])
{
/* Ignore whitespace */
case ' ':
case '\n':
case '\r':
case '\t':
continue;
default:
name[j++] = buf[i];
}
}
name[j] = '\0';
/*
* Ignore any whitespace following the '=' sign
*/
for (; i < MAXLEN; ++i)
{
if (buf[i+1] == ' ')
continue;
if (buf[i+1] == '\t')
continue;
break;
}
/*
* Extract parameter value
*/
j = 0;
for (++i; i < MAXLEN; ++i)
if (buf[i] == '\'')
continue;
else if (buf[i] == '#')
break;
else if (buf[i] != '\n')
value[j++] = buf[i];
else
break;
value[j] = '\0';
trim(value);
}
/*
* reload_config()
*
* This is only called by repmgrd after receiving a SIGHUP or when a monitoring
* loop is started up; it therefore only needs to reload options required
* by repmgrd, which are as follows:
*
* changeable options:
* - failover
* - follow_command
* - logfacility
* - logfile
* - loglevel
* - master_response_timeout
* - monitor_interval_secs
* - priority
* - promote_command
* - reconnect_attempts
* - reconnect_interval
* - retry_promote_interval_secs
* - witness_repl_nodes_sync_interval_secs
*
* non-changeable options:
* - cluster_name
* - conninfo
* - node
* - node_name
*
* extract with something like:
* grep local_options\\. repmgrd.c | perl -n -e '/local_options\.([\w_]+)/ && print qq|$1\n|;' | sort | uniq
*/
bool
reload_config(t_configuration_options *orig_options)
{
PGconn *conn;
t_configuration_options new_options = T_CONFIGURATION_OPTIONS_INITIALIZER;
bool config_changed = false;
bool log_config_changed = false;
static ItemList config_errors = { NULL, NULL };
/*
* Re-read the configuration file: repmgr.conf
*/
log_info(_("reloading configuration file\n"));
_parse_config(&new_options, &config_errors);
if (config_errors.head != NULL)
{
/* XXX dump errors to log */
log_warning(_("unable to parse new configuration, retaining current configuration\n"));
return false;
}
/* The following options cannot be changed */
if (strcmp(new_options.cluster_name, orig_options->cluster_name) != 0)
{
log_warning(_("cluster_name cannot be changed, retaining current configuration\n"));
return false;
}
if (new_options.node != orig_options->node)
{
log_warning(_("node ID cannot be changed, retaining current configuration\n"));
return false;
}
if (strcmp(new_options.node_name, orig_options->node_name) != 0)
{
log_warning(_("node_name cannot be changed, keeping current configuration\n"));
return false;
}
if (strcmp(orig_options->conninfo, new_options.conninfo) != 0)
{
/* Test conninfo string works*/
conn = establish_db_connection(new_options.conninfo, false);
if (!conn || (PQstatus(conn) != CONNECTION_OK))
{
log_warning(_("'conninfo' string is not valid, retaining current configuration\n"));
return false;
}
PQfinish(conn);
}
/*
* No configuration problems detected - copy any changed values
*
* NB: keep these in the same order as in config.h to make it easier
* to manage them
*/
/* failover */
if (orig_options->failover != new_options.failover)
{
orig_options->failover = new_options.failover;
config_changed = true;
}
/* follow_command */
if (strcmp(orig_options->follow_command, new_options.follow_command) != 0)
{
strcpy(orig_options->follow_command, new_options.follow_command);
config_changed = true;
}
/* master_response_timeout */
if (orig_options->master_response_timeout != new_options.master_response_timeout)
{
orig_options->master_response_timeout = new_options.master_response_timeout;
config_changed = true;
}
/* monitor_interval_secs */
if (orig_options->monitor_interval_secs != new_options.monitor_interval_secs)
{
orig_options->monitor_interval_secs = new_options.monitor_interval_secs;
config_changed = true;
}
/* priority */
if (orig_options->priority != new_options.priority)
{
orig_options->priority = new_options.priority;
config_changed = true;
}
/* promote_command */
if (strcmp(orig_options->promote_command, new_options.promote_command) != 0)
{
strcpy(orig_options->promote_command, new_options.promote_command);
config_changed = true;
}
/* reconnect_attempts */
if (orig_options->reconnect_attempts != new_options.reconnect_attempts)
{
orig_options->reconnect_attempts = new_options.reconnect_attempts;
config_changed = true;
}
/* reconnect_interval */
if (orig_options->reconnect_interval != new_options.reconnect_interval)
{
orig_options->reconnect_interval = new_options.reconnect_interval;
config_changed = true;
}
/* retry_promote_interval_secs */
if (orig_options->retry_promote_interval_secs != new_options.retry_promote_interval_secs)
{
orig_options->retry_promote_interval_secs = new_options.retry_promote_interval_secs;
config_changed = true;
}
/* witness_repl_nodes_sync_interval_secs */
if (orig_options->witness_repl_nodes_sync_interval_secs != new_options.witness_repl_nodes_sync_interval_secs)
{
orig_options->witness_repl_nodes_sync_interval_secs = new_options.witness_repl_nodes_sync_interval_secs;
config_changed = true;
}
/*
* Handle changes to logging configuration
*/
if (strcmp(orig_options->logfacility, new_options.logfacility) != 0)
{
strcpy(orig_options->logfacility, new_options.logfacility);
log_config_changed = true;
}
if (strcmp(orig_options->logfile, new_options.logfile) != 0)
{
strcpy(orig_options->logfile, new_options.logfile);
log_config_changed = true;
}
if (strcmp(orig_options->loglevel, new_options.loglevel) != 0)
{
strcpy(orig_options->loglevel, new_options.loglevel);
log_config_changed = true;
}
if (log_config_changed == true)
{
log_notice(_("restarting logging with changed parameters\n"));
logger_shutdown();
logger_init(orig_options, progname());
}
if (config_changed == true)
{
log_notice(_("configuration file reloaded with changed parameters\n"));
}
/*
* if logging configuration changed, don't say the configuration didn't
* change, as it clearly has.
*/
else if (log_config_changed == false)
{
log_info(_("configuration has not changed\n"));
}
return config_changed;
}
void
item_list_append(ItemList *item_list, char *error_message)
{
ItemListCell *cell;
cell = (ItemListCell *) pg_malloc0(sizeof(ItemListCell));
if (cell == NULL)
{
log_err(_("unable to allocate memory; terminating.\n"));
exit(ERR_BAD_CONFIG);
}
cell->string = pg_malloc0(MAXLEN);
strncpy(cell->string, error_message, MAXLEN);
if (item_list->tail)
{
item_list->tail->next = cell;
}
else
{
item_list->head = cell;
}
item_list->tail = cell;
}
/*
* Convert provided string to an integer using strtol;
* on error, if a callback is provided, pass the error message to that,
* otherwise exit
*/
int
repmgr_atoi(const char *value, const char *config_item, ItemList *error_list, bool allow_negative)
{
char *endptr;
long longval = 0;
char error_message_buf[MAXLEN] = "";
/* It's possible that some versions of strtol() don't treat an empty
* string as an error.
*/
if (*value == '\0')
{
snprintf(error_message_buf,
MAXLEN,
_("no value provided for \"%s\""),
config_item);
}
else
{
errno = 0;
longval = strtol(value, &endptr, 10);
if (value == endptr || errno)
{
snprintf(error_message_buf,
MAXLEN,
_("\"%s\": invalid value (provided: \"%s\")"),
config_item, value);
}
}
/* Disallow negative values for most parameters */
if (allow_negative == false && longval < 0)
{
snprintf(error_message_buf,
MAXLEN,
_("\"%s\" must be zero or greater (provided: %s)"),
config_item, value);
}
/* Error message buffer is set */
if (error_message_buf[0] != '\0')
{
if (error_list == NULL)
{
log_err("%s\n", error_message_buf);
exit(ERR_BAD_CONFIG);
}
item_list_append(error_list, error_message_buf);
}
return (int32) longval;
}
/*
* Split argument into old_dir and new_dir and append to tablespace mapping
* list.
*
* Adapted from pg_basebackup.c
*/
static void
tablespace_list_append(t_configuration_options *options, const char *arg)
{
TablespaceListCell *cell;
char *dst;
char *dst_ptr;
const char *arg_ptr;
cell = (TablespaceListCell *) pg_malloc0(sizeof(TablespaceListCell));
if (cell == NULL)
{
log_err(_("unable to allocate memory; terminating\n"));
exit(ERR_BAD_CONFIG);
}
dst_ptr = dst = cell->old_dir;
for (arg_ptr = arg; *arg_ptr; arg_ptr++)
{
if (dst_ptr - dst >= MAXPGPATH)
{
log_err(_("directory name too long\n"));
exit(ERR_BAD_CONFIG);
}
if (*arg_ptr == '\\' && *(arg_ptr + 1) == '=')
; /* skip backslash escaping = */
else if (*arg_ptr == '=' && (arg_ptr == arg || *(arg_ptr - 1) != '\\'))
{
if (*cell->new_dir)
{
log_err(_("multiple \"=\" signs in tablespace mapping\n"));
exit(ERR_BAD_CONFIG);
}
else
{
dst = dst_ptr = cell->new_dir;
}
}
else
*dst_ptr++ = *arg_ptr;
}
if (!*cell->old_dir || !*cell->new_dir)
{
log_err(_("invalid tablespace mapping format \"%s\", must be \"OLDDIR=NEWDIR\"\n"),
arg);
exit(ERR_BAD_CONFIG);
}
canonicalize_path(cell->old_dir);
canonicalize_path(cell->new_dir);
if (options->tablespace_mapping.tail)
options->tablespace_mapping.tail->next = cell;
else
options->tablespace_mapping.head = cell;
options->tablespace_mapping.tail = cell;
}
/*
* parse_event_notifications_list()
*
*
*/
static void
parse_event_notifications_list(t_configuration_options *options, const char *arg)
{
const char *arg_ptr;
char event_type_buf[MAXLEN] = "";
char *dst_ptr = event_type_buf;
for (arg_ptr = arg; arg_ptr <= (arg + strlen(arg)); arg_ptr++)
{
/* ignore whitespace */
if (*arg_ptr == ' ' || *arg_ptr == '\t')
{
continue;
}
/*
* comma (or end-of-string) should mark the end of an event type -
* just as long as there was something preceding it
*/
if ((*arg_ptr == ',' || *arg_ptr == '\0') && event_type_buf[0] != '\0')
{
EventNotificationListCell *cell;
cell = (EventNotificationListCell *) pg_malloc0(sizeof(EventNotificationListCell));
if (cell == NULL)
{
log_err(_("unable to allocate memory; terminating\n"));
exit(ERR_BAD_CONFIG);
}
strncpy(cell->event_type, event_type_buf, MAXLEN);
if (options->event_notifications.tail)
{
options->event_notifications.tail->next = cell;
}
else
{
options->event_notifications.head = cell;
}
options->event_notifications.tail = cell;
memset(event_type_buf, 0, MAXLEN);
dst_ptr = event_type_buf;
}
/* ignore duplicated commas */
else if (*arg_ptr == ',')
{
continue;
}
else
{
*dst_ptr++ = *arg_ptr;
}
}
}