bin/ovr, share/man/man1/ovr.1: --no-alt: Add option to not use the alternate screen

In some cases, it might be simpler to use normal stdout.

Signed-off-by: Alejandro Colomar <alx@kernel.org>

2 files changed, 24 insertions, 1 deletions

diff --git a/bin/ovr b/bin/ovr
index e04357c..a930710 100755
--- a/bin/ovr
+++ b/bin/ovr
@@ -26,7 +26,15 @@ ovr_alt()
 }
 
 
+ovr_noalt()
+{
+	sed -e "s/^\(.\{,$(tput cols)\}\).*$/\1/" \
+	    -e '2,$s/^/\x1B[1A\x1B[K/';
+}
+
+
 n=1;
+alt=1
 while test $# -ge 1; do
 	case "$1" in
 	-n | --lines)
@@ -36,6 +44,9 @@ while test $# -ge 1; do
 		n="$2";
 		shift;
 		;;
+	--no-alt)
+		alt=0;
+		;;
 	-*)
 		err "$1: Unknown option.";
 		;;
@@ -46,4 +57,8 @@ while test $# -ge 1; do
 	shift;
 done;
 
-ovr_alt;
+if test "$alt" = "1"; then
+	ovr_alt;
+else
+	ovr_noalt;
+fi;
diff --git a/share/man/man1/ovr.1 b/share/man/man1/ovr.1
index c9641f5..8aa7bb6 100644
--- a/share/man/man1/ovr.1
+++ b/share/man/man1/ovr.1
@@ -22,6 +22,14 @@ stdout lines overwrite each other
 Set the number of lines that should remain in the terminal
 after the program ends.
 Default is 1.
+.TP
+.B \-\-no\-alt
+Don't use the alternate screen.
+Instead,
+use control escape sequences
+to overwrite previous lines in the terminal.
+.B \-n
+is ignored in this mode.
 .
 .
 .SH Description