From 6d6bb88a0215b87a4a47ed86a84ae3c75d399962 Mon Sep 17 00:00:00 2001
From: Jeffrey Armstrong <jeffrey.armstrong@approximatrix.com>
Date: Sun, 24 Apr 2016 18:05:02 -0400
Subject: Initial import of 5.0 source code with minor changes to use termios
 on Linux.

---
 unix.c | 171 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 171 insertions(+)
 create mode 100644 unix.c

(limited to 'unix.c')

diff --git a/unix.c b/unix.c
new file mode 100644
index 0000000..3ac06c7
--- /dev/null
+++ b/unix.c
@@ -0,0 +1,171 @@
+/*
+  Terminal I/O routines for SEDT (a la UNIX)
+*/
+#include <stdio.h>
+#include <stdlib.h>
+#if defined(ULTRIX)
+#include <sys/ioctl.h>
+#include <sgtty.h>
+#else
+#include <sys/ioctl.h>
+#if defined(CONVEX)
+#include <sys/termios.h>
+#else
+#if defined(LINUX)
+#include <termios.h>
+#else
+#include <termio.h>
+#endif
+#endif
+#if defined(SGI)
+#include <sys/ttold.h>
+#endif
+#endif
+
+int     tty;
+#if defined(ULTRIX)
+struct	sgttyb	restore, special;
+#else
+#if defined(CONVEX) | defined(LINUX)
+struct  termios  restore, special;
+#else
+struct  termio  restore, special;
+#endif
+#endif
+
+UInit()
+{
+    /*char    *ttyname();*/
+
+/*
+  Open up the terminal device user is on.  Get the characteristics
+  of this terminal, make a copy, and set for no post-processing,
+  no echo, no canonical input processing, and process each character
+  when typed rather than await a new-line.
+*/
+    if((tty = open(ttyname(fileno(stdin)), 2)) <= 0)
+    {
+    	perror("Can't attach the terminal");
+    	exit(0);
+    }
+#if defined(ULTRIX)
+    ioctl(tty, TIOCGETP, &restore);
+#else
+#if defined(LINUX)
+    tcgetattr(tty, &restore);
+#else
+    ioctl(tty, TCGETA, &restore);
+#endif
+#endif
+
+    special = restore;
+    
+#if defined(ULTRIX)
+    special.sg_flags &= ~(ECHO | CRMOD);
+    special.sg_flags |= CBREAK;
+    ioctl(tty, TIOCSETP, &special);
+#else
+    special.c_iflag &= ~ICRNL;
+    special.c_oflag &= ~OPOST;
+    special.c_lflag &= ~(ECHO | ICANON | ISIG);
+    special.c_cc[VEOF] = 1;
+#if defined(LINUX)
+    tcsetattr(tty, TCSANOW, &special);
+#else
+    ioctl(tty, TCSETA, &special);
+#endif
+#endif
+
+}
+
+UEnd()
+{
+
+/*
+  Restore terminal attributes and close.
+*/
+#if defined(ULTRIX)
+    ioctl(tty, TIOCSETP, &restore);
+#else
+#if defined(LINUX)
+    tcsetattr(tty, TCSANOW, &restore);
+#else
+    ioctl(tty, TCSETA, &restore);
+#endif
+#endif
+    close(tty);
+}
+
+USysenv()
+{
+
+/*
+  Restore terminal attributes prior to Spawning a command.
+*/
+#if defined(ULTRIX)
+    ioctl(tty, TIOCSETP, &restore);
+#else
+#if defined(LINUX)
+    tcsetattr(tty, TCSANOW, &restore);
+#else
+    ioctl(tty, TCSETA, &restore);
+#endif
+#endif
+    close(tty);
+}
+
+USedtenv()
+{
+
+/*
+  Set terminal attributes back to Sedt specifications.
+*/
+    if((tty = open(ttyname(fileno(stdin)), 2)) <= 0)
+    {
+    	perror("Can't attach the terminal");
+    	exit(0);
+    }
+#if defined(ULTRIX)
+    ioctl(tty, TIOCSETP, &special);
+#else
+
+#if defined(LINUX)
+    tcsetattr(tty, TCSANOW, &special);
+#else
+    ioctl(tty, TCSETA, &special);
+#endif
+
+#endif
+}
+
+UGetrm()
+{
+unsigned
+    char    key;
+
+    if((read(tty, &key, 1)) < 1)
+    {
+    	perror("Can't read from terminal");
+    	exit(0);
+    }
+    return((int)key);
+}
+
+UPutrm(string, length)
+char    *string;
+int     length;
+{
+    write(tty, string, length);
+}
+
+#if defined(SUN)
+char _toupper(C)
+char C;
+{return toupper(C);
+}
+
+char _tolower(C)
+char C;
+{return tolower(C);
+}
+#endif
-- 
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