Merge branch 'maint'

Conflicts:
	OTP_VERSION
	erts/emulator/sys/unix/sys.c
	erts/vsn.mk

1 files changed, 29 insertions, 13 deletions

diff --git a/erts/emulator/sys/unix/sys.c b/erts/emulator/sys/unix/sys.c
index 6248651882..69be052381 100644
--- a/erts/emulator/sys/unix/sys.c
+++ b/erts/emulator/sys/unix/sys.c
@@ -227,8 +227,7 @@ static int sig_notify_fds[2] = {-1, -1};
 
 static int sig_suspend_fds[2] = {-1, -1};
 #define ERTS_SYS_SUSPEND_SIGNAL SIGUSR2
-#elif defined(USE_THREADS)
-static int async_fd[2];
+
 #endif
 
 jmp_buf erts_sys_sigsegv_jmp;
@@ -273,6 +272,8 @@ static void note_child_death(int, int);
 static void* child_waiter(void *);
 #endif
 
+static int crashdump_companion_cube_fd = -1;
+
 /********************* General functions ****************************/
 
 /* This is used by both the drivers and general I/O, must be set early */
@@ -602,6 +603,14 @@ erts_sys_pre_init(void)
       close(fd);
     }
 
+    /* We need a file descriptor to close in the crashdump creation.
+     * We close this one to be sure we can get a fd for our real file ...
+     * so, we create one here ... a stone to carry all the way home.
+     */
+
+    crashdump_companion_cube_fd = open("/dev/null", O_RDONLY);
+
+    /* don't lose it, there will be cake */
 }
 
 void
@@ -726,14 +735,13 @@ static ERTS_INLINE int
 prepare_crash_dump(int secs)
 {
 #define NUFBUF (3)
-    int i, max;
+    int i;
     char env[21]; /* enough to hold any 64-bit integer */
     size_t envsz;
     DeclareTmpHeapNoproc(heap,NUFBUF);
     Port *heart_port;
     Eterm *hp = heap;
     Eterm list = NIL;
-    int heart_fd[2] = {-1,-1};
     int has_heart = 0;
 
     UseTmpHeapNoproc(NUFBUF);
@@ -756,21 +764,21 @@ prepare_crash_dump(int secs)
 	alarm((unsigned int)secs);
     }
 
-    if (heart_port) {
-	/* hearts input fd
-	 * We "know" drv_data is the in_fd since the port is started with read|write
-	 */
-	heart_fd[0] = (int)heart_port->drv_data;
-	heart_fd[1] = (int)driver_data[heart_fd[0]].ofd;
-	has_heart   = 1;
+    /* close all viable sockets via emergency close callbacks.
+     * Specifically we want to close epmd sockets.
+     */
 
-	list = CONS(hp, make_small(8), list); hp += 2;
+    erts_emergency_close_ports();
 
+    if (heart_port) {
+	has_heart = 1;
+	list = CONS(hp, make_small(8), list); hp += 2;
 	/* send to heart port, CMD = 8, i.e. prepare crash dump =o */
 	erts_port_output(NULL, ERTS_PORT_SIG_FLG_FORCE_IMM_CALL, heart_port,
 			 heart_port->common.id, list, NULL);
     }
 
+<<<<<<< HEAD
     /* Make sure we unregister at epmd (unknown fd) and get at least
        one free filedescriptor (for erl_crash.dump) */
 
@@ -796,6 +804,10 @@ prepare_crash_dump(int secs)
 
 	close(i);
     }
+=======
+    /* Make sure we have a fd for our crashdump file. */
+    close(crashdump_companion_cube_fd);
+>>>>>>> maint
 
     envsz = sizeof(env);
     i = erts_sys_getenv__("ERL_CRASH_DUMP_NICE", env, &envsz);
@@ -1645,9 +1657,13 @@ static ErlDrvData spawn_start(ErlDrvPort port_num, char* name, SysDriverOpts* op
 			goto child_error;
 	    }
 
+#if defined(HAVE_CLOSEFROM)
+	    closefrom(opts->use_stdio ? 3 : 5);
+#else
 	    for (i = opts->use_stdio ? 3 : 5; i < max_files; i++)
 		(void) close(i);
-	    
+#endif
+
 	    if (opts->wd && chdir(opts->wd) < 0)
 		goto child_error;