* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*
- * Copyright (C) 2009 Jo-Philipp Wich <xm@subsignal.org>
+ * Copyright (C) 2009 Jo-Philipp Wich <jow@openwrt.org>
*/
#include "watchdog.h"
/* Global watchdog fd, required by signal handler */
int wdfd = -1;
+/* Handle finished children */
+static void sigchld_handler(int sig)
+{
+ pid_t pid;
+
+ while( (pid = waitpid(-1, NULL, WNOHANG)) > 0 )
+ syslog(LOG_INFO, "Child returned (pid %d)", pid);
+}
+
/* Watchdog shutdown helper */
static void shutdown_watchdog(int sig)
{
- static int wdelay = 3600;
static const char wshutdown = WATCH_SHUTDOWN;
if( wdfd > -1 )
}
/* Add tuple */
-static void load_wifi_uci_add_iface(const char *section, struct uci_itr_ctx *itr)
+static void load_wifi_uci_add_iface(const char *section, struct uci_wifi_iface_itr_ctx *itr)
{
wifi_tuple_t *t;
const char *ucitmp;
static wifi_tuple_t * load_wifi_uci(wifi_tuple_t *ifs, time_t *modtime)
{
struct uci_context *ctx;
- struct uci_itr_ctx itr;
+ struct uci_wifi_iface_itr_ctx itr;
wifi_tuple_t *cur, *next;
if( check_uci_update("wireless", modtime) )
{
- syslog(LOG_INFO, "Config changed, reloading");
+ syslog(LOG_INFO, "Wireless config changed, reloading");
if( (ctx = ucix_init("wireless")) != NULL )
{
return ifs;
}
+/* Add tuple */
+static void load_watchdog_uci_add_process(const char *section, struct uci_process_itr_ctx *itr)
+{
+ process_tuple_t *t;
+ const char *ucitmp;
+ int val = 0;
+
+ if( (t = (process_tuple_t *)malloc(sizeof(process_tuple_t))) != NULL )
+ {
+ t->restart = 0;
+
+ ucitmp = ucix_get_option(itr->ctx, "freifunk-watchdog", section, "process");
+ if(ucitmp)
+ {
+ strncpy(t->process, ucitmp, sizeof(t->process));
+ val++;
+ }
+
+ ucitmp = ucix_get_option(itr->ctx, "freifunk-watchdog", section, "initscript");
+ if(ucitmp)
+ {
+ strncpy(t->initscript, ucitmp, sizeof(t->initscript));
+ val++;
+ }
+
+ if( val == 2 )
+ {
+ syslog(LOG_INFO, "Monitoring %s: initscript=%s",
+ t->process, t->initscript);
+
+ t->next = itr->list;
+ itr->list = t;
+ }
+ else
+ {
+ free(t);
+ }
+ }
+}
+
+/* Load config */
+static process_tuple_t * load_watchdog_uci(process_tuple_t *procs)
+{
+ struct uci_context *ctx;
+ struct uci_process_itr_ctx itr;
+ process_tuple_t *cur, *next;
+
+ syslog(LOG_INFO, "Loading watchdog config");
+
+ if( (ctx = ucix_init("freifunk-watchdog")) != NULL )
+ {
+ if( procs != NULL )
+ {
+ for(cur = procs; cur; cur = next)
+ {
+ next = cur->next;
+ free(cur);
+ }
+ }
+
+ itr.list = NULL;
+ itr.ctx = ctx;
+
+ ucix_for_each_section_type(ctx, "freifunk-watchdog", "process",
+ (void *)load_watchdog_uci_add_process, &itr);
+
+ return itr.list;
+ }
+
+ return procs;
+}
+
/* Daemon implementation */
static int do_daemon(void)
{
char bssid[18];
struct sigaction sa;
- wifi_tuple_t *ifs = NULL, *curif;
- time_t modtime = 0;
+ wifi_tuple_t *ifs = NULL, *curr_if;
+ process_tuple_t *procs = NULL, *curr_proc;
+ time_t wireless_modtime = 0;
int action_intv = 0;
int restart_wifi = 0;
- int restart_cron = 0;
- int restart_sshd = 0;
int loadavg_panic = 0;
openlog(SYSLOG_IDENT, 0, LOG_DAEMON);
- //daemon(1, 1);
+ memset(&sa, 0, sizeof(sa));
if( (iwfd = socket(AF_INET, SOCK_DGRAM, 0)) == -1 )
{
ioctl(wdfd, WDIOC_SETTIMEOUT, &wdtimeout);
}
+ /* Install signal handler to reap children */
+ sa.sa_handler = sigchld_handler;
+ sa.sa_flags = 0;
+ sigaction(SIGCHLD, &sa, NULL);
+
+ /* Load watchdog configuration only once */
+ procs = load_watchdog_uci(procs);
+
while( 1 )
{
/* Check/increment action interval */
else
loadavg_panic = 0;
- /* Check crond */
- if( find_process("crond") < 0 )
- restart_cron++;
- else
- restart_cron = 0;
-
- /* Check SSHd */
- if( find_process("dropbear") < 0 )
- restart_sshd++;
- else
- restart_sshd = 0;
-
/* Check wireless interfaces */
- ifs = load_wifi_uci(ifs, &modtime);
- for( curif = ifs; curif; curif = curif->next )
+ ifs = load_wifi_uci(ifs, &wireless_modtime);
+ for( curr_if = ifs; curr_if; curr_if = curr_if->next )
{
/* Get current channel and bssid */
- if( (iw_get_bssid(iwfd, curif->ifname, bssid) == 0) &&
- (iw_get_channel(iwfd, curif->ifname, &channel) == 0) )
+ if( (iw_get_bssid(iwfd, curr_if->ifname, bssid) == 0) &&
+ (iw_get_channel(iwfd, curr_if->ifname, &channel) == 0) )
{
/* Check BSSID */
- if( strcasecmp(bssid, curif->bssid) != 0 )
+ if( strcasecmp(bssid, curr_if->bssid) != 0 )
{
syslog(LOG_WARNING, "BSSID mismatch on %s: current=%s wanted=%s",
- curif->ifname, bssid, curif->bssid);
+ curr_if->ifname, bssid, curr_if->bssid);
restart_wifi++;
}
/* Check channel */
- else if( channel != curif->channel )
+ else if( channel != curr_if->channel )
{
syslog(LOG_WARNING, "Channel mismatch on %s: current=%d wanted=%d",
- curif->ifname, channel, curif->channel);
+ curr_if->ifname, channel, curr_if->channel);
restart_wifi++;
}
}
else
{
- syslog(LOG_WARNING, "Requested interface %s not present", curif->ifname);
+ syslog(LOG_WARNING, "Requested interface %s not present", curr_if->ifname);
+ }
+ }
+
+ /* Check processes */
+ for( curr_proc = procs; curr_proc; curr_proc = curr_proc->next )
+ {
+ if( find_process(curr_proc->process) < 0 )
+ curr_proc->restart++;
+ else
+ curr_proc->restart = 0;
+
+ /* Process restart required? */
+ if( curr_proc->restart >= HYSTERESIS )
+ {
+ curr_proc->restart = 0;
+ syslog(LOG_WARNING, "The %s process died, restarting", curr_proc->process);
+ EXEC(PROC_ACTION);
}
}
EXEC(WIFI_ACTION);
}
- /* Cron restart required? */
- if( restart_cron >= HYSTERESIS )
- {
- restart_cron = 0;
- syslog(LOG_WARNING, "The cron process died, restarting");
- EXEC(CRON_ACTION);
- }
-
- /* SSHd restart required? */
- if( restart_sshd >= HYSTERESIS )
- {
- restart_sshd = 0;
- syslog(LOG_WARNING, "The ssh process died, restarting");
- EXEC(SSHD_ACTION);
- }
-
/* Is there a load problem? */
if( loadavg_panic >= HYSTERESIS )
{
projects / oweals / luci.git / blobdiff