[project @ 2000-03-14 09:55:05 by simonmar]

[ghc-hetmet.git] / ghc / rts / Signals.c

diff --git a/ghc/rts/Signals.c b/ghc/rts/Signals.c
index f044325..90b46ba 100644 (file)
--- a/ghc/rts/Signals.c
+++ b/ghc/rts/Signals.c
@@ -1,5 +1,5 @@
 /* -----------------------------------------------------------------------------
- * $Id: Signals.c,v 1.11 2000/01/12 15:15:18 simonmar Exp $
+ * $Id: Signals.c,v 1.14 2000/02/29 14:38:19 simonmar Exp $
  *
  * (c) The GHC Team, 1998-1999
  *
@@ -48,8 +48,7 @@ more_handlers(I_ sig)
 
     if (handlers == NULL) {
       /* don't fflush(stdout); WORKAROUND bug in Linux glibc */
-      fprintf(stderr, "VM exhausted (in more_handlers)\n");
-      exit(EXIT_FAILURE);
+      barf("VM exhausted (in more_handlers)");
     }
     for(i = nHandlers; i <= sig; i++)
       /* Fill in the new slots with default actions */
@@ -230,9 +229,7 @@ StgInt
 sig_install(StgInt sig, StgInt spi, StgStablePtr handler, sigset_t *mask)
 {
   /* don't fflush(stdout); WORKAROUND bug in Linux glibc */
-  fprintf(stderr,
-         "No signal handling support in a parallel implementation.\n");
-  exit(EXIT_FAILURE);
+  barf("no signal handling support in a parallel implementation");
 }
 
 void
@@ -266,7 +263,7 @@ shutdown_handler(int sig STG_UNUSED)
   } else
 #endif
 
-  shutdownHaskellAndExit(EXIT_FAILURE);
+    interruptStgRts();
 }
 
 /*
@@ -276,9 +273,13 @@ shutdown_handler(int sig STG_UNUSED)
  * Haskell code may install their own SIGINT handler, which is
  * fine, provided they're so kind as to put back the old one
  * when they de-install.
+ *
+ * We ignore SIGPIPE, because our I/O library handles EPIPE properly,
+ * and a SIGPIPE tends to cause the program to exit silently and
+ * mysteriously.
  */
 void
-init_shutdown_handler()
+init_default_handlers()
 {
     struct sigaction action,oact;
 
@@ -290,13 +291,13 @@ init_shutdown_handler()
     action.sa_flags = 0;
     if (sigaction(SIGINT, &action, &oact) != 0) {
       /* Oh well, at least we tried. */
-#ifdef DEBUG
-      fprintf(stderr, "init_shutdown_handler: failed to reg SIGINT handler");
-#endif
+      prog_belch("failed to install SIGINT handler");
     }
-}
-
-
 
+    action.sa_handler = SIG_IGN;
+    if (sigaction(SIGPIPE, &action, &oact) != 0) {
+      prog_belch("failed to install SIGINT handler");
+    }
+}
 
 #endif /*! mingw32_TARGET_OS */