From 82d4a8bb686836a91ad058f3681f131440c3ae2f Mon Sep 17 00:00:00 2001
From: Liang Chang <l-chang@users.sourceforge.net>
Date: Tue, 20 Apr 2021 08:46:54 +0800
Subject: [PATCH] DtTerm: Add pts driver support.

---
 cde/lib/DtTerm/TermPrim/Imakefile            |   4 +
 cde/lib/DtTerm/TermPrim/TermPrimGetPty-pts.c | 104 +++++++++++++++++++
 2 files changed, 108 insertions(+)
 create mode 100644 cde/lib/DtTerm/TermPrim/TermPrimGetPty-pts.c

diff --git a/cde/lib/DtTerm/TermPrim/Imakefile b/cde/lib/DtTerm/TermPrim/Imakefile
index 0f209613f..46cf8b4ae 100644
--- a/cde/lib/DtTerm/TermPrim/Imakefile
+++ b/cde/lib/DtTerm/TermPrim/Imakefile
@@ -77,6 +77,9 @@ OBJS = \
 
 #include <Library.tmpl>
 
+#if defined(HasPtsDriver) && HasPtsDriver
+LinkFile(TermPrimGetPty.c,TermPrimGetPty-pts.c)
+#else
 /* These should be cleaned up.  Test SVR4Architecture? */
 #ifdef AlphaArchitecture
 LinkFile(TermPrimGetPty.c,TermPrimGetPty-bsd.c)
@@ -105,6 +108,7 @@ LinkFile(TermPrimGetPty.c,TermPrimGetPty-svr4.c)
 #ifdef BSDArchitecture
 LinkFile(TermPrimGetPty.c,TermPrimGetPty-bsd.c)
 #endif
+#endif
 
 SubdirLibraryRule($(OBJS))
 
diff --git a/cde/lib/DtTerm/TermPrim/TermPrimGetPty-pts.c b/cde/lib/DtTerm/TermPrim/TermPrimGetPty-pts.c
new file mode 100644
index 000000000..ed5b0af73
--- /dev/null
+++ b/cde/lib/DtTerm/TermPrim/TermPrimGetPty-pts.c
@@ -0,0 +1,104 @@
+/*
+ * CDE - Common Desktop Environment
+ *
+ * Copyright (c) 1993-2012, The Open Group. All rights reserved.
+ *
+ * These libraries and programs are free software; you can
+ * redistribute them and/or modify them under the terms of the GNU
+ * Lesser General Public License as published by the Free Software
+ * Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * These libraries and programs are distributed in the hope that
+ * they will be useful, but WITHOUT ANY WARRANTY; without even the
+ * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ * PURPOSE. See the GNU Lesser General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with these libraries and programs; if not, write
+ * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
+ * Floor, Boston, MA 02110-1301 USA
+ */
+/*                                                                      *
+ * (c) Copyright 1993, 1994 Hewlett-Packard Company                     *
+ * (c) Copyright 1993, 1994 International Business Machines Corp.       *
+ * (c) Copyright 1993, 1994 Sun Microsystems, Inc.                      *
+ * (c) Copyright 1993, 1994 Novell, Inc.                                *
+ */
+
+#ifndef _XOPEN_SOURCE
+#define _XOPEN_SOURCE 600
+#endif
+
+#include "TermPrim.h"
+#include "TermPrimDebug.h"
+#include "TermHeader.h"
+#include <errno.h>
+#include <fcntl.h>
+#include <stdlib.h>
+
+int
+_DtTermPrimGetPty(char **ptySlave, char **ptyMaster)
+{
+    char *c;
+    int ptyFd;
+
+    *ptyMaster = NULL;
+
+    if (isDebugFSet('p', 10)) {
+#ifdef	BBA
+#pragma	BBA_IGNORE
+#endif	/*BBA*/
+        return(-1);
+    }
+
+    if ((ptyFd = posix_openpt(O_RDWR)) >= 0) {
+
+        /* use grantpt to prevent other processes from grabbing the tty that
+         * goes with the pty master we have opened.  It is a mandatory step
+         * in the SVR4 pty-tty initialization.  Note that /dev must be
+         * mounted read/write...
+         */
+        Debug('T', timeStamp("_DtTermPrimGetPty() calling grantpt()"));
+        if (grantpt(ptyFd) == -1) {
+            (void) perror("grantpt");
+            (void) close(ptyFd);
+            return(-1);
+        }
+
+        /* Unlock the pty master/slave pair so the slave can be opened later */
+        Debug('T', timeStamp("_DtTermPrimGetPty() calling unlockpt()"));
+        if (unlockpt(ptyFd) == -1) {
+            (void) perror("unlockpt");
+            (void) close(ptyFd);
+            return(-1);
+        }
+        Debug('T', timeStamp("_DtTermPrimGetPty() unlockpt() finished"));
+
+        /* get the pty slave name... */
+        if (c = ptsname(ptyFd)) {
+            *ptySlave = malloc(strlen(c) + 1);
+            (void) strcpy(*ptySlave, c);
+            return(ptyFd);
+        } else {
+            /* ptsname on the pty master failed.  This should not happen!... */
+            (void) perror("ptsname");
+            (void) close(ptyFd);
+        }
+    } else {
+        (void) perror("posix_openpt");
+    }
+    return(-1);
+}
+
+/* dummy functions */
+
+void _DtTermPrimReleasePty(char *ptySlave) {}
+void _DtTermPrimPtyCleanup(void) {}
+
+int
+_DtTermPrimSetupPty(char *ptySlave, int ptyFd)
+{
+  return(0);
+}