Libc-391.2.7.tar.gz

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

diff --git a/compat-43/sigcompat.c b/compat-43/sigcompat.c
index a0f57214cbc1db73146d5d0b3d50e3b477b8de60..ba1aed1349bd9ae9d047e2652d370d4d888c0aa1 100644 (file)
--- a/compat-43/sigcompat.c
+++ b/compat-43/sigcompat.c
@@ -3,19 +3,20 @@
  *
  * @APPLE_LICENSE_HEADER_START@
  * 
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * 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
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
  * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
  * 
  * @APPLE_LICENSE_HEADER_END@
  */
@@ -56,8 +57,12 @@
 #include <sys/param.h>
 #include <signal.h>
 #include <errno.h>
+#if defined(__DYNAMIC__)
+extern int _sigaction_nobind (int sig, const struct sigaction *nsv, struct sigaction *osv);
+#endif
 
-static int sigvec__(signo, sv, osv, bind)
+static int
+sigvec__(signo, sv, osv, bind)
        int signo;
        struct sigvec *sv, *osv;
        int bind;
@@ -80,7 +85,8 @@ static int sigvec__(signo, sv, osv, bind)
        return (ret);
 }
 
-int sigvec(signo, sv, osv)
+int
+sigvec(signo, sv, osv)
         int signo;
         struct sigvec *sv, *osv;
 {
@@ -88,7 +94,8 @@ int sigvec(signo, sv, osv)
 }
 
 #if defined(__DYNAMIC__)
-int _sigvec_nobind(signo, sv, osv)
+int
+_sigvec_nobind(signo, sv, osv)
         int signo;
         struct sigvec *sv, *osv;
 {
@@ -96,7 +103,8 @@ int _sigvec_nobind(signo, sv, osv)
 }
 #endif
 
-int sigsetmask(mask)
+int
+sigsetmask(mask)
        int mask;
 {
        int omask, n;
@@ -107,7 +115,8 @@ int sigsetmask(mask)
        return (omask);
 }
 
-int sigblock(mask)
+int
+sigblock(mask)
        int mask;
 {
        int omask, n;
@@ -118,32 +127,79 @@ int sigblock(mask)
        return (omask);
 }
 
-int sigpause(mask)
+int
+sigpause(mask)
        int mask;
 {
        return (sigsuspend((sigset_t *)&mask));
 }
 
-int sighold(sig)
+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));
 }
-int sigrelse(sig)
+
+int
+sigrelse(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_UNBLOCK, &mask,(sigset_t *)0));
 }
 
+
+int
+sigignore(sig)
+       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);
+       }
+}