initial import

1 files changed, 93 insertions, 0 deletions

diff --git a/signal.c b/signal.c
new file mode 100644
index 0000000..5b49b52
--- /dev/null
+++ b/signal.c
@@ -0,0 +1,93 @@
+/*  
+   Copyright (C)  2006 Renaissance Technologies Corp.
+                  main developer: HP Wei <hp@rentec.com>
+   Copyright (C)  2005 Renaissance Technologies Corp.
+                  main developer: HP Wei <hp@rentec.com>
+		  The code in this file is copied from 
+                  Richard Stevens' book
+                  "UNIX Network Programming" Chap.22.3
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; see the file COPYING.
+   If not, write to the Free Software Foundation,
+   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  
+*/
+
+#include "signal.h"
+
+Sigfunc * signal(int signo, Sigfunc *func)
+{
+	struct sigaction	act, oact;
+
+	act.sa_handler = func;
+	sigemptyset(&act.sa_mask);
+	act.sa_flags = 0;
+	if (signo == SIGALRM) {
+#ifdef	SA_INTERRUPT
+		act.sa_flags |= SA_INTERRUPT;	/* SunOS 4.x */
+#endif
+	} else {
+#ifdef	SA_RESTART
+		act.sa_flags |= SA_RESTART;     /* SVR4, 44BSD */
+#endif
+	}
+	if (sigaction(signo, &act, &oact) < 0)
+		return(SIG_ERR);
+	return(oact.sa_handler);
+}
+/* end signal */
+
+Sigfunc * Signal(int signo, Sigfunc *func)	/* for our signal() function */
+{
+	Sigfunc	*sigfunc;
+
+	if ( (sigfunc = signal(signo, func)) == SIG_ERR)
+		perror("signal error");
+	return(sigfunc);
+}
+
+int Fcntl(int fd, int cmd, int arg)
+{
+	int	n;
+
+	if ( (n = fcntl(fd, cmd, arg)) == -1)
+		perror("fcntl error");
+	return(n);
+}
+
+int Ioctl(int fd, int request, void *arg)
+{
+	int		n;
+
+	if ( (n = ioctl(fd, request, arg)) == -1)
+		perror("ioctl error");
+	return(n);	/* streamio of I_LIST returns value */
+}
+
+void Sigemptyset(sigset_t *set)
+{
+	if (sigemptyset(set) == -1)
+		perror("sigemptyset error");
+}
+
+void Sigaddset(sigset_t *set, int signo)
+{
+	if (sigaddset(set, signo) == -1)
+		perror("sigaddset error");
+}
+
+void Sigprocmask(int how, const sigset_t *set, sigset_t *oset)
+{
+	if (sigprocmask(how, set, oset) == -1)
+		perror("sigprocmask error");
+}