From 908104fbb46e866572ca05e59ee51e9db8c94161 Mon Sep 17 00:00:00 2001
From: Robert de Bath <rdebath@tvisiontech.co.uk>
Date: Sun, 17 Jan 2016 08:32:00 +0000
Subject: [PATCH] Add 'No ANSI terminal' option.

---
 attach.c | 8 ++++++--
 dtach.h  | 2 +-
 main.c   | 5 +++++
 3 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/attach.c b/attach.c
index 41a696c..09a198d 100644
--- a/attach.c
+++ b/attach.c
@@ -40,8 +40,11 @@ restore_term(void)
 	tcsetattr(0, TCSADRAIN, &orig_term);
 
 	/* Make cursor visible. Assumes VT100. */
-	printf("\033[?25h");
+	if (!no_ansiterm)
+	    printf("\033[?25h");
 	fflush(stdout);
+	if (no_ansiterm)
+	    (void)system("tput init 2>/dev/null");
 }
 
 /* Connects to a unix domain socket */
@@ -214,7 +217,8 @@ attach_main(int noerror)
 	tcsetattr(0, TCSADRAIN, &cur_term);
 
 	/* Clear the screen. This assumes VT100. */
-	write(1, "\33[H\33[J", 6);
+	if (!no_ansiterm)
+	    write(1, "\33[H\33[J", 6);
 
 	/* Tell the master that we want to attach. */
 	memset(&pkt, 0, sizeof(struct packet));
diff --git a/dtach.h b/dtach.h
index c4d39cb..534071c 100644
--- a/dtach.h
+++ b/dtach.h
@@ -81,7 +81,7 @@
 #endif
 
 extern char *progname, *sockname;
-extern int detach_char, no_suspend, redraw_method;
+extern int detach_char, no_suspend, redraw_method, no_ansiterm;
 extern struct termios orig_term;
 extern int dont_have_tty;
 
diff --git a/main.c b/main.c
index 9fe78b8..2472d98 100644
--- a/main.c
+++ b/main.c
@@ -36,6 +36,8 @@ int detach_char = '\\' - 64;
 int no_suspend;
 /* The default redraw method. Initially set to unspecified. */
 int redraw_method = REDRAW_UNSPEC;
+/* 1 if we should not send ansi sequences to the terminal */
+int no_ansiterm = 0;
 
 /*
 ** The original terminal settings. Shared between the master and attach
@@ -78,6 +80,7 @@ usage()
 		"\t\t   ctrl_l: Send a Ctrl L character to the program.\n"
 		"\t\t    winch: Send a WINCH signal to the program.\n"
 		"  -z\t\tDisable processing of the suspend key.\n"
+		"  -t\t\tDisable VT100 assumptions.\n"
 		"\nReport any bugs to <" PACKAGE_BUGREPORT ">.\n",
 		PACKAGE_VERSION, __DATE__, __TIME__);
 	exit(0);
@@ -158,6 +161,8 @@ main(int argc, char **argv)
 				detach_char = -1;
 			else if (*p == 'z')
 				no_suspend = 1;
+			else if (*p == 't')
+				no_ansiterm = 1;
 			else if (*p == 'e')
 			{
 				++argv; --argc;