contrib/package: reap zombies in freifunk-watchdog, fix a warning

diff --git a/contrib/package/freifunk-watchdog/Makefile b/contrib/package/freifunk-watchdog/Makefile
index 7a68afb..25c4efa 100644 (file)
--- a/contrib/package/freifunk-watchdog/Makefile
+++ b/contrib/package/freifunk-watchdog/Makefile
@@ -8,7 +8,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=freifunk-watchdog
-PKG_RELEASE:=6
+PKG_RELEASE:=7
 
 PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)
 PKG_BUILD_DEPENDS := uci

diff --git a/contrib/package/freifunk-watchdog/src/watchdog.c b/contrib/package/freifunk-watchdog/src/watchdog.c
index b87bed0..2d6e4a6 100644 (file)
--- a/contrib/package/freifunk-watchdog/src/watchdog.c
+++ b/contrib/package/freifunk-watchdog/src/watchdog.c
@@ -21,10 +21,18 @@
 /* Global watchdog fd, required by signal handler */
 int wdfd = -1;
 
+/* Handle finished childs */
+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 )
@@ -298,7 +306,7 @@ static int do_daemon(void)
        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 )
        {
@@ -327,6 +335,11 @@ static int do_daemon(void)
                ioctl(wdfd, WDIOC_SETTIMEOUT, &wdtimeout);
        }
 
+       /* Install signal handler to reap childs */
+       sa.sa_handler = sigchld_handler;
+       sa.sa_flags = 0;
+       sigaction(SIGCHLD, &sa, NULL);
+
        while( 1 )
        {
                /* Check/increment action interval */

diff --git a/contrib/package/freifunk-watchdog/src/watchdog.h b/contrib/package/freifunk-watchdog/src/watchdog.h
index 6d9ccf8..71c10e9 100644 (file)
--- a/contrib/package/freifunk-watchdog/src/watchdog.h
+++ b/contrib/package/freifunk-watchdog/src/watchdog.h
@@ -29,6 +29,7 @@
 #include <math.h>
 #include <time.h>
 #include <signal.h>
+#include <sys/wait.h>
 #include <sys/stat.h>
 #include <sys/ioctl.h>
 #include <sys/socket.h>
@@ -67,7 +68,7 @@
 
 /* System load error action and treshold */
 #define LOAD_TRESHOLD  15.00
-#define LOAD_ACTION            "/sbin/reboot"
+#define LOAD_ACTION            "/sbin/reboot", "/sbin/reboot"
 
 /* Fallback binary name (passed by makefile) */
 #ifndef BINARY
@@ -107,22 +108,20 @@ iw_ioctl(int                  skfd,           /* Socket to the kernel */
 }
 
 /* fork() & execl() helper */
-#define EXEC(x)                                                                                                                        \
-       do {                                                                                                                            \
-               switch(fork())                                                                                                  \
-               {                                                                                                                               \
-                       case -1:                                                                                                        \
-                               syslog(LOG_CRIT, "Unable to fork child: %s",                    \
-                                       strerror(errno));                                                                       \
-                                                                                                                                               \
-                                       break;                                                                                          \
-                                                                                                                                               \
-                               case 0:                                                                                                 \
-                                       execl(x, NULL);                                                                         \
-                                       syslog(LOG_CRIT, "Unable to execute action: %s",        \
-                                               strerror(errno));                                                               \
-                                                                                                                                               \
-                                       return 1;                                                                                       \
-               }                                                                                                                               \
+#define EXEC(x)                                                                                                                \
+       do {                                                                                                                    \
+               switch(fork())                                                                                          \
+               {                                                                                                                       \
+                       case -1:                                                                                                \
+                               syslog(LOG_CRIT, "Unable to fork child: %s",            \
+                                       strerror(errno));                                                               \
+                               break;                                                                                          \
+                                                                                                                                       \
+                       case 0:                                                                                                 \
+                               execl(x, NULL);                                                                         \
+                               syslog(LOG_CRIT, "Unable to execute action: %s",        \
+                                       strerror(errno));                                                               \
+                               return 1;                                                                                       \
+               }                                                                                                                       \
        } while(0)