Libc-594.9.5.tar.gz

[apple/libc.git] / compat-43 / sigcompat.c

diff --git a/compat-43/sigcompat.c b/compat-43/sigcompat.c
index d4b2f8f1a3dd15e4e2bfcacd45345d329b2fd03b..8c4410db1ec9437f4782ca301965e0d67b7619f3 100644 (file)
--- a/compat-43/sigcompat.c
+++ b/compat-43/sigcompat.c
@@ -3,8 +3,6 @@
  *
  * @APPLE_LICENSE_HEADER_START@
  * 
- * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
- * 
  * This file contains Original Code and/or Modifications of Original Code
  * as defined in and that are subject to the Apple Public Source License
  * Version 2.0 (the 'License'). You may not use this file except in
@@ -55,10 +53,20 @@
  * SUCH DAMAGE.
  */
 
+#if __DARWIN_UNIX03
+#ifdef VARIANT_CANCELABLE
+#include <pthread.h>
+
+extern void _pthread_testcancel(pthread_t thread, int isconforming);
+#endif /* VARIANT_CANCELABLE */
+extern int __unix_conforming;
+#endif /* __DARWIN_UNIX03 */
 
 #include <sys/param.h>
 #include <signal.h>
 #include <errno.h>
+
+#ifndef BUILDING_VARIANT
 #if defined(__DYNAMIC__)
 extern int _sigaction_nobind (int sig, const struct sigaction *nsv, struct sigaction *osv);
 #endif
@@ -128,22 +136,51 @@ sigblock(mask)
                return (n);
        return (omask);
 }
+#endif /* !BUILDING_VARIANT */
 
+#if __DARWIN_UNIX03
+int
+sigpause(sig)
+       int sig;
+{
+       sigset_t mask;
+
+       if (__unix_conforming == 0)
+               __unix_conforming = 1;
+#ifdef VARIANT_CANCELABLE
+       _pthread_testcancel(pthread_self(), 1);
+#endif /* VARIANT_CANCELABLE */
+
+       if ((sig <= 0) || (sig >= NSIG)) {
+               errno = EINVAL;
+               return(-1);
+       }
+       if (sigprocmask(SIG_BLOCK, (sigset_t *) 0, (sigset_t *) &mask) < 0) {
+               return(-1);
+       }
+       sigdelset(&mask, sig);
+       return (sigsuspend(&mask));
+}
+#else
 int
 sigpause(mask)
        int mask;
 {
        return (sigsuspend((sigset_t *)&mask));
 }
+#endif /* __DARWIN_UNIX03 */
 
+#ifndef BUILDING_VARIANT
 int
 sighold(sig)
        int sig;
 {
        sigset_t mask;
 
-       if ((sig < 0) || (sig > NSIG))
-               return(EINVAL);
+       if ((sig <= 0) || (sig >= NSIG)) {
+               errno = EINVAL;
+               return(-1);
+       }
        sigemptyset(&mask);
        sigaddset(&mask, sig);
        return(sigprocmask(SIG_BLOCK, &mask,(sigset_t *)0));
@@ -155,8 +192,10 @@ sigrelse(sig)
 {
        sigset_t mask;
 
-       if ((sig < 0) || (sig > NSIG))
-               return(EINVAL);
+       if ((sig <= 0) || (sig >= NSIG)) {
+               errno = EINVAL;
+               return(-1);
+       }
        sigemptyset(&mask);
        sigaddset(&mask, sig);
        return(sigprocmask(SIG_UNBLOCK, &mask,(sigset_t *)0));
@@ -170,3 +209,35 @@ sigignore(sig)
        return (signal(sig, SIG_IGN) == SIG_ERR ? -1 : 0);
 }
 
+void (*sigset(int sig, void (*disp)(int)))(int) {
+       sigset_t omask;
+       int blocked;
+       struct sigaction oact;
+
+       if ((sig <= 0) || (sig >= NSIG)) {
+               errno = EINVAL;
+               return (SIG_ERR);
+       }
+       if (-1 == sigprocmask(0, NULL, &omask))
+               return (SIG_ERR);
+       blocked = sigismember(&omask, sig);
+       if (disp == SIG_HOLD) {
+               if (blocked)
+                       return (SIG_HOLD);
+               if ((-1 == sigaction(sig, NULL, &oact)) ||
+                   (-1 == sighold(sig)))
+                       return (SIG_ERR);
+               return (sig_t)oact.sa_handler;
+       } else {
+               if (blocked) {
+                       if (-1 == sigrelse(sig))
+                               return (SIG_ERR);
+               }
+               sig_t rv = signal(sig, disp);
+               if (rv != SIG_ERR)
+                       return blocked ? SIG_HOLD : rv;
+               else
+                       return (rv);
+       }
+}
+#endif /* !BUILDING_VARIANT */