Merged revisions 48375 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

................
r48375 | tilghman | 2006-12-10 18:47:21 -0600 (Sun, 10 Dec 2006) | 13 lines

Merged revisions 48374 via svnmerge from 
https://origsvn.digium.com/svn/asterisk/branches/1.2

........
r48374 | tilghman | 2006-12-10 18:33:59 -0600 (Sun, 10 Dec 2006) | 5 lines

When doing a fork() and exec(), two problems existed (Issue 8086):
1) Ignored signals stayed ignored after the exec().
2) Signals could possibly fire between the fork() and exec(), causing Asterisk
signal handlers within the child to execute, which caused nasty race conditions.

........

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git-svn-id: http://svn.digium.com/svn/asterisk/trunk@48376 f38db490-d61c-443f-a65b-d21fe96a405b

1 files changed, 11 insertions, 1 deletions

diff --git a/apps/app_externalivr.c b/apps/app_externalivr.c
index f9b890588..bcda8d663 100644
--- a/apps/app_externalivr.c
+++ b/apps/app_externalivr.c
@@ -40,6 +40,7 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 #include <string.h>
 #include <unistd.h>
 #include <errno.h>
+#include <signal.h>
 
 #include "asterisk/lock.h"
 #include "asterisk/file.h"
@@ -262,9 +263,13 @@ static int app_exec(struct ast_channel *chan, void *data)
 		.finishlist = AST_LIST_HEAD_INIT_VALUE,
 	};
 	struct ivr_localuser *u = &foo;
+	sigset_t fullset, oldset;
 
 	lu = ast_module_user_add(chan);
-	
+
+	sigfillset(&fullset);
+	pthread_sigmask(SIG_BLOCK, &fullset, &oldset);
+
 	u->abort_current_sound = 0;
 	u->chan = chan;
 	
@@ -313,6 +318,9 @@ static int app_exec(struct ast_channel *chan, void *data)
 		/* child process */
 		int i;
 
+		signal(SIGPIPE, SIG_DFL);
+		pthread_sigmask(SIG_UNBLOCK, &fullset, NULL);
+
 		if (ast_opt_high_priority)
 			ast_set_priority(0);
 
@@ -336,6 +344,8 @@ static int app_exec(struct ast_channel *chan, void *data)
 		int waitfds[2] = { child_errors_fd, child_commands_fd };
 		struct ast_channel *rchan;
 
+		pthread_sigmask(SIG_SETMASK, &oldset, NULL);
+
 		close(child_stdin[0]);
 		child_stdin[0] = 0;
 		close(child_stdout[1]);