From 7ec17ba524709c44561ed6016ba2940473bfa48f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Dan=20Hor=C3=A1k?= <dan@danny.cz>
Date: Tue, 29 Mar 2011 10:51:45 +0200
Subject: [PATCH 70/70] hyptop: Prevent interactive mode on s390 line mode terminals

Description: hyptop: Prevent interactive mode on s390 line mode terminals
Symptom:     Unreadable output, when hyptop is started on line mode terminals.
Problem:     Check for line mode terminal is missing.
Solution:    To prevent hyptop starting in interactive mode on line mode
             terminals, the TERM variable is checked. If TERM is unset or
             set to "dumb" interactive mode is not allowed.
---
 hyptop/hyptop.8 |    8 ++++++++
 hyptop/hyptop.c |   21 ++++++++++++++++++++-
 2 files changed, 28 insertions(+), 1 deletions(-)

diff --git a/hyptop/hyptop.8 b/hyptop/hyptop.8
index 325613b..19c9d7c 100644
--- a/hyptop/hyptop.8
+++ b/hyptop/hyptop.8
@@ -211,3 +211,11 @@ for CPU time calculation, enter:
 .br
 
   # hyptop -t ifl,cp
+
+.SH ENVIRONMENT
+.TP
+.B TERM
+The TERM environment variable specifies your terminal type. To run
+\fBhyptop\fP in interactive mode the TERM environment variable has
+to be set. The interactive mode is not available for terminals that
+have TERM=dumb (e.g. line mode terminals).
diff --git a/hyptop/hyptop.c b/hyptop/hyptop.c
index c42e8b0..c558a21 100644
--- a/hyptop/hyptop.c
+++ b/hyptop/hyptop.c
@@ -199,6 +199,23 @@ static int l_initscr(void)
 }
 
 /*
+ * Check if terminal is able to run hyptop in curses mode
+ */
+static void l_term_check(void)
+{
+	char *term_str = getenv("TERM");
+
+	if (!term_str)
+		ERR_EXIT("Please set TERM environment variable or "
+			 "try \"--batch_mode\"\n");
+
+ 	/* S390 line mode terminals normally have TERM=dumb */
+	if (strcmp(term_str, "dumb") == 0)
+		ERR_EXIT("Terminal of type \"dumb\" is not supported,"
+			" try \"--batch_mode\"\n");
+}
+
+/*
  * Init curses
  */
 static void l_term_init(void)
@@ -206,6 +223,8 @@ static void l_term_init(void)
 	if (g.o.batch_mode_specified)
 		return;
 
+	l_term_check();
+
 	if (l_initscr() == ERR)
 		goto fail;
 	if (noecho() == ERR)
@@ -221,7 +240,7 @@ static void l_term_init(void)
 	l_sig_handler_init();
 	return;
 fail:
-	ERR_EXIT("Could not initialize curses, try \"--batchmode\"\n");
+	ERR_EXIT("Could not initialize curses, try \"--batch_mode\"\n");
 }
 
 /*
-- 
1.7.4