1 files changed, 100 insertions, 0 deletions
diff --git a/src/appl/libpty/init_slave.c b/src/appl/libpty/init_slave.c
new file mode 100644
index 0000000000..ce75076454
--- /dev/null
+++ b/src/appl/libpty/init_slave.c
@@ -0,0 +1,100 @@
+/*
+ * pty_init_slave: open slave side of terminal, clearing for use.
+ *
+ * Copyright 1995, 1996 by the Massachusetts Institute of Technology.
+ * 
+ * Permission to use, copy, modify, and distribute this software and
+ * its documentation for any purpose and without fee is hereby
+ * granted, provided that the above copyright notice appear in all
+ * copies and that both that copyright notice and this permission
+ * notice appear in supporting documentation, and that the name of
+ * M.I.T. not be used in advertising or publicity pertaining to
+ * distribution of the software without specific, written prior
+ * permission.  Furthermore if you modify this software you must label
+ * your software as modified software and not distribute it in such a
+ * fashion that it might be confused with the original M.I.T. software.
+ * M.I.T. makes no representations about the suitability
+ * of this software for any purpose.  It is provided "as is" without
+ * express or implied warranty.
+ * 
+ */
+
+#include "com_err.h"
+#include "libpty.h"
+#include "pty-int.h"
+
+/* * The following is an array of modules that should be pushed on the
+ *  stream.  See configure.in for caviats and notes about when this
+ *  array is used and not used.
+ */
+#if defined(HAVE_STREAMS)&&(!defined(HAVE_LINE_PUSH))
+static char *push_list[] = {
+#ifdef PUSH_PTEM
+  "ptem",
+#endif
+#ifdef PUSH_LDTERM
+  "ldterm",
+#endif
+#ifdef PUSH_TTCOMPAT
+"ttcompat",
+#endif
+  0};
+#endif /*HAVE_STREAMS but not HAVE_LINE_PUSH*/
+
+ 
+
+long pty_initialize_slave (int fd)
+{
+#if defined(POSIX_TERMIOS) && !defined(ultrix)
+    struct termios new_termio;
+#else
+    struct sgttyb b;
+#endif /* POSIX_TERMIOS */
+    int pid;
+	    
+#ifdef HAVE_STREAMS
+#ifdef HAVE_LINE_PUSH
+        while (ioctl (fd, I_POP, 0) == 0); /*Clear out any old lined's*/
+
+    if (line_push(fd) < 0)
+	{
+	    (void) close(fd); fd = -1;
+	    return PTY_OPEN_SLAVE_LINE_PUSHFAIL;
+	}
+#else /*No line_push */
+    {
+       char **module = &push_list[0];
+      while (*module)
+		if (ioctl(fd, I_PUSH, *(module++)) < 0)
+		  	return PTY_OPEN_SLAVE_PUSH_FAIL;
+    }
+
+#endif /*LINE_PUSH*/
+#endif /*HAVE_STREAMS*/
+
+    /*
+	 * Under Ultrix 3.0, the pgrp of the slave pty terminal
+	 * needs to be set explicitly.  Why rlogind works at all
+	 * without this on 4.3BSD is a mystery.
+	 */
+#ifdef GETPGRP_ONEARG
+    pid = getpgrp(getpid());
+#else
+    pid = getpgrp();
+#endif
+
+#ifdef TIOCSPGRP
+    ioctl(fd, TIOCSPGRP, &pid);
+#endif
+
+    
+#if defined(POSIX_TERMIOS) && !defined(ultrix)
+	tcsetpgrp(fd, pid);
+	tcgetattr(fd,&new_termio);
+	new_termio.c_cc[VMIN] = 1;
+	new_termio.c_cc[VTIME] = 0;
+    tcsetattr(fd,TCSANOW,&new_termio);
+#endif /* POSIX_TERMIOS */
+
+    return 0;
+}