From 083a9198ea7b48a887e38d6e04aa7245fc573be2 Mon Sep 17 00:00:00 2001
From: Russell Bryant <russell@russellbryant.com>
Date: Tue, 30 Jan 2007 17:19:39 +0000
Subject: [PATCH] Merged revisions 52903 via svnmerge from
 https://origsvn.digium.com/svn/asterisk/branches/1.2

........
r52903 | russell | 2007-01-30 11:12:04 -0600 (Tue, 30 Jan 2007) | 9 lines

The SIGHUP handler was implemented to allow admins to send SIGHUP to a running
Asterisk process to reload the configuration.  However, doing the actual reload
in the signal handler itself is a very bad thing to do, because the reload
process includes calling non-reentrant functions such as malloc/calloc/etc.
If Asterisk is running in the background, then the reload will happen
immediately.  However, if running in console mode, the reload doesn't work
until something is typed at the console.  That sort of defeats the purpose,
but I don't see an easy way to get around it at this point.

........


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@52904 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---
 main/asterisk.c | 21 +++++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

diff --git a/main/asterisk.c b/main/asterisk.c
index e5e38d7251..6d83e809ca 100644
--- a/main/asterisk.c
+++ b/main/asterisk.c
@@ -233,6 +233,8 @@ static pthread_t consolethread = AST_PTHREADT_NULL;
 
 static char randompool[256];
 
+static unsigned int need_reload;
+
 #if !defined(LOW_MEMORY)
 struct file_version {
 	AST_LIST_ENTRY(file_version) list;
@@ -1040,8 +1042,7 @@ static void hup_handler(int num)
 		printf("Received HUP signal -- Reloading configs\n");
 	if (restartnow)
 		execvp(_argv[0], _argv);
-	/* XXX This could deadlock XXX */
-	ast_module_reload(NULL);
+	need_reload = 1;
 	signal(num, hup_handler);
 }
 
@@ -2201,6 +2202,11 @@ static void ast_remotecontrol(char * data)
 				}
 			}
 		}
+
+		if (need_reload) {
+			need_reload = 0;
+			ast_module_reload(NULL);
+		}
 	}
 	printf("\nDisconnected from Asterisk server\n");
 }
@@ -2850,14 +2856,21 @@ int main(int argc, char *argv[])
 					ast_log(LOG_WARNING, "Failed to open /dev/null to recover from dead console. Bad things will happen!\n");
 				break;
 			}
+			if (need_reload) {
+				need_reload = 0;
+				ast_module_reload(NULL);
+			}
 		}
-
 	}
 	/* Do nothing */
 	for (;;) {	/* apparently needed for Mac OS X */
 		struct pollfd p = { -1 /* no descriptor */, 0, 0 };
-
 		poll(&p, 0, -1);
+ 		/* SIGHUP will cause this to break out of poll() */
+ 		if (need_reload) {
+ 			need_reload = 0;
+ 			ast_module_reload(NULL);
+ 		}
 	}
 
 	return 0;