X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=server.c;h=9c06991378512172e95b70165118ae1ea873bdb1;hp=5823cb28d5f458e9b885bf6cddb2795275ac3aa9;hb=ac153fd54a0f093581ee863984070a325d5343b8;hpb=00e4d4da1b2c00da139b09d3ed4ab9ad9fba2691

diff --git a/server.c b/server.c
index 5823cb28..9c069913 100644
--- a/server.c
+++ b/server.c
@@ -115,7 +115,6 @@ int mmd_mutex;
 
 /** The file containing user information (public key, permissions). */
 static char *user_list_file = NULL;
-static int mmd_shm_id;
 
 
 /** The task responsible for server command handling. */
@@ -162,16 +161,16 @@ static void init_colors_or_die(void)
 static void init_ipc_or_die(void)
 {
 	void *shm;
-	int ret = shm_new(sizeof(struct misc_meta_data));
+	int shmid, ret = shm_new(sizeof(struct misc_meta_data));
 
 	if (ret < 0)
 		goto err_out;
-
-	ret = shm_attach(ret, ATTACH_RW, &shm);
+	shmid = ret;
+	ret = shm_attach(shmid, ATTACH_RW, &shm);
+	shm_destroy(shmid);
 	if (ret < 0)
 		goto err_out;
 	mmd = shm;
-	mmd_shm_id = ret;
 
 	ret = mutex_new();
 	if (ret < 0)
@@ -303,8 +302,6 @@ genocide:
 		kill(0, SIGTERM);
 		mutex_destroy(mmd_mutex);
 		shm_detach(mmd);
-		shm_destroy(mmd_shm_id);
-
 		exit(EXIT_FAILURE);
 	}
 }
@@ -331,8 +328,6 @@ static void init_signal_task(void)
 		goto err;
 	if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
 		goto err;
-	if (signal(SIGUSR1, SIG_IGN) == SIG_ERR)
-		goto err;
 	add_close_on_fork_list(st->fd);
 	register_task(&st->task);
 	return;
@@ -502,6 +497,18 @@ static void server_init(int argc, char **argv)
 		daemonize();
 	PARA_NOTICE_LOG("initializing audio format handlers\n");
 	afh_init();
+
+	/*
+	 * Although afs uses its own signal handling we must ignore SIGUSR1
+	 * _before_ the afs child process gets born by init_afs() below.  It's
+	 * racy to do this in the child because the parent might send SIGUSR1
+	 * before the child gets a chance to ignore this signal -- only the
+	 * good die young.
+	 */
+	if (signal(SIGUSR1, SIG_IGN) == SIG_ERR) {
+		PARA_EMERG_LOG("failed to ignore SIGUSR1\n");
+		exit(EXIT_FAILURE);
+	}
 	PARA_NOTICE_LOG("initializing the audio file selector\n");
 	afs_socket = init_afs();
 	init_signal_task();