Libc-1353.100.2.tar.gz

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

diff --git a/compat-43/sigcompat.c b/compat-43/sigcompat.c
index 33c801c8b45ad3bbc71763e40612e5066dc8fb53..1e8ca3984f0d2016dba343162c7b8e1a4028acdb 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
@@ -55,15 +53,28 @@
  * SUCH DAMAGE.
  */
 
+#if __DARWIN_UNIX03
+#ifdef VARIANT_CANCELABLE
+#include <pthread.h>
+#endif /* VARIANT_CANCELABLE */
+extern int __unix_conforming;
+#endif /* __DARWIN_UNIX03 */
 
 #include <sys/param.h>
 #include <signal.h>
 #include <errno.h>
 
-static int sigvec__(signo, sv, osv, bind)
-       int signo;
-       struct sigvec *sv, *osv;
-       int bind;
+#ifndef BUILDING_VARIANT
+#if defined(__DYNAMIC__)
+extern int _sigaction_nobind (int sig, const struct sigaction *nsv, struct sigaction *osv);
+extern int _sigvec_nobind (int, struct sigvec *, struct sigvec *);
+#endif
+
+static int
+sigvec__(int signo,
+        struct sigvec *sv,
+        struct sigvec *osv,
+        int bind)
 {
        int ret;
 
@@ -83,24 +94,26 @@ static int sigvec__(signo, sv, osv, bind)
        return (ret);
 }
 
-int sigvec(signo, sv, osv)
-        int signo;
-        struct sigvec *sv, *osv;
+int
+sigvec(int signo,
+       struct sigvec *sv,
+       struct sigvec *osv)
 {
     return sigvec__(signo, sv, osv, 1);
 }
 
 #if defined(__DYNAMIC__)
-int _sigvec_nobind(signo, sv, osv)
-        int signo;
-        struct sigvec *sv, *osv;
+int
+_sigvec_nobind(int signo,
+              struct sigvec *sv,
+              struct sigvec *osv)
 {
     return sigvec__(signo, sv, osv, 0);
 }
 #endif
 
-int sigsetmask(mask)
-       int mask;
+int
+sigsetmask(int mask)
 {
        int omask, n;
 
@@ -110,8 +123,8 @@ int sigsetmask(mask)
        return (omask);
 }
 
-int sigblock(mask)
-       int mask;
+int
+sigblock(int mask)
 {
        int omask, n;
 
@@ -120,33 +133,103 @@ int sigblock(mask)
                return (n);
        return (omask);
 }
+#endif /* !BUILDING_VARIANT */
 
-int sigpause(mask)
-       int mask;
+#if __DARWIN_UNIX03
+int
+sigpause(int sig)
+{
+       sigset_t mask;
+
+       if (__unix_conforming == 0)
+               __unix_conforming = 1;
+#ifdef VARIANT_CANCELABLE
+       pthread_testcancel();
+#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(int mask)
 {
        return (sigsuspend((sigset_t *)&mask));
 }
+#endif /* __DARWIN_UNIX03 */
 
-int sighold(sig)
-       int sig;
+#ifndef BUILDING_VARIANT
+int
+sighold(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));
 }
-int sigrelse(sig)
-       int sig;
+
+int
+sigrelse(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_UNBLOCK, &mask,(sigset_t *)0));
 }
 
+
+int
+sigignore(int 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 */