[or-cvs] let children survive sigint, sigterm, etc.

[Roger Dingledine]

Update of /home/or/cvsroot/src/or
In directory moria.mit.edu:/home2/arma/work/onion/cvs/src/or

Modified Files:
	circuitbuild.c cpuworker.c dns.c main.c or.h 
Log Message:
let children survive sigint, sigterm, etc.
this was biting us because ^c would get delivered to all of them,
maybe because they were all still listening to stdin?


Index: circuitbuild.c
===================================================================
RCS file: /home/or/cvsroot/src/or/circuitbuild.c,v
retrieving revision 1.18
retrieving revision 1.19
diff -u -d -r1.18 -r1.19
--- circuitbuild.c	4 Aug 2004 05:10:49 -0000	1.18
+++ circuitbuild.c	8 Aug 2004 07:25:45 -0000	1.19
@@ -449,7 +449,7 @@
   } else if (rh.length == 4+2+ONIONSKIN_CHALLENGE_LEN+DIGEST_LEN) {
     old_format = 0;
   } else {
-    log_fn(LOG_WARN, "Wrong length on extend cell. Closing circuit.");
+    log_fn(LOG_WARN, "Wrong length %d on extend cell. Closing circuit.", rh.length);
     return -1;
   }
 

Index: cpuworker.c
===================================================================
RCS file: /home/or/cvsroot/src/or/cpuworker.c,v
retrieving revision 1.48
retrieving revision 1.49
diff -u -d -r1.48 -r1.49
--- cpuworker.c	22 Jul 2004 22:15:36 -0000	1.48
+++ cpuworker.c	8 Aug 2004 07:25:45 -0000	1.49
@@ -207,6 +207,7 @@
 #ifndef MS_WINDOWS
   connection_free_all(); /* so the child doesn't hold the parent's fd's open */
 #endif
+  handle_signals(0); /* ignore interrupts from the keyboard, etc */
 
   dup_onion_keys(&onion_key, &last_onion_key);
 

Index: dns.c
===================================================================
RCS file: /home/or/cvsroot/src/or/dns.c,v
retrieving revision 1.104
retrieving revision 1.105
diff -u -d -r1.104 -r1.105
--- dns.c	5 Aug 2004 19:33:54 -0000	1.104
+++ dns.c	8 Aug 2004 07:25:45 -0000	1.105
@@ -641,6 +641,7 @@
 #ifndef MS_WINDOWS
   connection_free_all(); /* so the child doesn't hold the parent's fd's open */
 #endif
+  handle_signals(0); /* ignore interrupts from the keyboard, etc */
 
   for(;;) {
 

Index: main.c
===================================================================
RCS file: /home/or/cvsroot/src/or/main.c,v
retrieving revision 1.313
retrieving revision 1.314
diff -u -d -r1.313 -r1.314
--- main.c	7 Aug 2004 02:46:15 -0000	1.313
+++ main.c	8 Aug 2004 07:25:45 -0000	1.314
@@ -1002,6 +1002,26 @@
 #endif
 }
 
+/** Set up the signal handlers for either parent or child. */
+void handle_signals(int is_parent)
+{
+#ifndef MS_WINDOWS /* do signal stuff only on unix */
+  struct sigaction action;
+  action.sa_flags = 0;
+  sigemptyset(&action.sa_mask);
+
+  action.sa_handler = is_parent ? catch : SIG_IGN;
+  sigaction(SIGINT,  &action, NULL); /* do a controlled slow shutdown */
+  sigaction(SIGTERM, &action, NULL); /* to terminate now */
+  sigaction(SIGPIPE, &action, NULL); /* otherwise sigpipe kills us */
+  sigaction(SIGUSR1, &action, NULL); /* dump stats */
+  sigaction(SIGHUP,  &action, NULL); /* to reload config, retry conns, etc */
+  if(is_parent)
+    sigaction(SIGCHLD, &action, NULL); /* handle dns/cpu workers that exit */
+#endif /* signal stuff */
+}
+
+
 /** Main entry point for the Tor command-line client.
  */
 static int tor_init(int argc, char *argv[]) {
@@ -1031,21 +1051,7 @@
     client_dns_init(); /* init the client dns cache */
   }
 
-#ifndef MS_WINDOWS /* do signal stuff only on unix */
-{
-  struct sigaction action;
-  action.sa_flags = 0;
-  sigemptyset(&action.sa_mask);
-
-  action.sa_handler = catch;
-  sigaction(SIGINT,  &action, NULL); /* do a controlled slow shutdown */
-  sigaction(SIGTERM, &action, NULL); /* to terminate now */
-  sigaction(SIGPIPE, &action, NULL); /* otherwise sigpipe kills us */
-  sigaction(SIGUSR1, &action, NULL); /* dump stats */
-  sigaction(SIGHUP,  &action, NULL); /* to reload config, retry conns, etc */
-  sigaction(SIGCHLD, &action, NULL); /* handle dns/cpu workers that exit */
-}
-#endif /* signal stuff */
+  handle_signals(1);
 
   crypto_global_init();
   crypto_seed_rng();

Index: or.h
===================================================================
RCS file: /home/or/cvsroot/src/or/or.h,v
retrieving revision 1.400
retrieving revision 1.401
diff -u -d -r1.400 -r1.401
--- or.h	7 Aug 2004 09:01:56 -0000	1.400
+++ or.h	8 Aug 2004 07:25:45 -0000	1.401
@@ -1204,6 +1204,7 @@
 int advertised_server_mode(void);
 int proxy_mode(void);
 
+void handle_signals(int is_parent);
 void tor_cleanup(void);
 
 /********************************* onion.c ***************************/