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---
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multipathd/main.c | 38 +++++++++++++++++++++++++++++---------
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1 file changed, 29 insertions(+), 9 deletions(-)
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Index: multipath-tools-130222/multipathd/main.c
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===================================================================
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--- multipath-tools-130222.orig/multipathd/main.c
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+++ multipath-tools-130222/multipathd/main.c
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@@ -87,6 +87,7 @@ unsigned int mpath_mx_alloc_len;
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int logsink;
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enum daemon_status running_state;
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pid_t daemon_pid;
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+pid_t parent_pid = -1;
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static sem_t exit_sem;
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/*
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@@ -1718,6 +1719,12 @@ sigusr2 (int sig)
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}
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static void
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+sigalrm (int sig)
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+{
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+ exit(0);
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+}
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+
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+static void
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signal_init(void)
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{
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sigset_t set;
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@@ -1820,6 +1827,9 @@ child (void * param)
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}
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running_state = DAEMON_START;
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+ pid_rc = pidfile_create(DEFAULT_PIDFILE, daemon_pid);
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+ if (parent_pid > 0)
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+ kill(parent_pid, SIGALRM);
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condlog(2, "--------start up--------");
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condlog(2, "read " DEFAULT_CONFIGFILE);
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@@ -1911,8 +1921,6 @@ child (void * param)
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}
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pthread_attr_destroy(&misc_attr);
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- /* Startup complete, create logfile */
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- pid_rc = pidfile_create(DEFAULT_PIDFILE, daemon_pid);
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update_timestamp(1);
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/* Ignore errors, we can live without */
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@@ -1992,7 +2000,10 @@ daemonize(void)
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{
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int pid;
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int dev_null_fd;
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+ struct sigaction oldsig;
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+ oldsig.sa_handler = signal_set(SIGALRM, sigalrm);
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+ parent_pid = getpid();
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if( (pid = fork()) < 0){
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fprintf(stderr, "Failed first fork : %s\n", strerror(errno));
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return -1;
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@@ -2000,10 +2011,13 @@ daemonize(void)
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else if (pid != 0)
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return pid;
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+ signal_set(SIGALRM, oldsig.sa_handler);
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setsid();
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- if ( (pid = fork()) < 0)
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+ if ( (pid = fork()) < 0) {
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fprintf(stderr, "Failed second fork : %s\n", strerror(errno));
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+ goto fail;
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+ }
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else if (pid != 0)
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_exit(0);
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@@ -2014,30 +2028,34 @@ daemonize(void)
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if (dev_null_fd < 0){
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fprintf(stderr, "cannot open /dev/null for input & output : %s\n",
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strerror(errno));
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- _exit(0);
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+ goto fail;
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}
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close(STDIN_FILENO);
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if (dup(dev_null_fd) < 0) {
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fprintf(stderr, "cannot dup /dev/null to stdin : %s\n",
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strerror(errno));
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- _exit(0);
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+ goto fail;
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}
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close(STDOUT_FILENO);
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if (dup(dev_null_fd) < 0) {
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fprintf(stderr, "cannot dup /dev/null to stdout : %s\n",
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strerror(errno));
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- _exit(0);
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+ goto fail;
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}
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close(STDERR_FILENO);
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if (dup(dev_null_fd) < 0) {
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fprintf(stderr, "cannot dup /dev/null to stderr : %s\n",
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strerror(errno));
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- _exit(0);
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+ goto fail;
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}
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close(dev_null_fd);
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daemon_pid = getpid();
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return 0;
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+
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+fail:
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+ kill(parent_pid, SIGALRM);
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+ _exit(0);
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}
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int
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@@ -2116,10 +2134,12 @@ main (int argc, char *argv[])
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if (err < 0)
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/* error */
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exit(1);
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- else if (err > 0)
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+ else if (err > 0) {
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+ /* wait up to 3 seconds for the child to start */
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+ sleep(3);
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/* parent dies */
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exit(0);
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- else
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+ } else
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/* child lives */
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return (child(NULL));
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}
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