Inizio delle considerazioni sull'uso della shared memory.

[gapil.git] / sources / SigHand.c

diff --git a/sources/SigHand.c b/sources/SigHand.c
index 53d185a08f50be41176c66ac1683fa2c2e840b0e..6b2cf95cf338ba4ae74ed25692c05b01f35aa362 100644 (file)
--- a/sources/SigHand.c
+++ b/sources/SigHand.c
@@ -22,7 +22,7 @@
  *
  * Author: S. Piccardi Dec. 2002
  *
- * $Id: SigHand.c,v 1.2 2002/12/03 22:30:11 piccardi Exp $
+ * $Id: SigHand.c,v 1.3 2002/12/11 00:51:38 piccardi Exp $
  *
  *****************************************************************************/
 #include <errno.h>                               /* error simbol definitions */
@@ -49,17 +49,15 @@
 inline SigFunc * Signal(int signo, SigFunc *func) 
 {
     struct sigaction new_handl, old_handl;
-    new_handl.sa_handler=func;
+    new_handl.sa_handler = func;                      /* set signal handler */
     /* clear signal mask: no signal blocked during execution of func */
-    if (sigemptyset(&new_handl.sa_mask)!=0){        /* initialize signal set */
-        perror("cannot initializes the signal set to empty");   /* see mess. */
-        exit(1);
+    if (sigemptyset(&new_handl.sa_mask)!=0){       /* initialize signal set */
+        return SIG_ERR;
     }
-    new_handl.sa_flags=0;                  /* init to 0 all flags */
+    new_handl.sa_flags=0;                            /* init to 0 all flags */
     /* change action for signo signal */
     if (sigaction(signo,&new_handl,&old_handl)){ 
-        perror("sigaction failed on signal action setting");
-       exit(1);
+        return SIG_ERR;
     }
     return (old_handl.sa_handler);
 }
@@ -68,7 +66,7 @@ inline SigFunc * Signal(int signo, SigFunc *func)
  * Generic handler for SIGCHLD signal
  * 
  * Simone Piccardi Dec. 2002
- * $Id: SigHand.c,v 1.2 2002/12/03 22:30:11 piccardi Exp $
+ * $Id: SigHand.c,v 1.3 2002/12/11 00:51:38 piccardi Exp $
  */
 void HandSigCHLD(int sig)
 {