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-rw-r--r--bin/clwr.sh23
1 files changed, 23 insertions, 0 deletions
diff --git a/bin/clwr.sh b/bin/clwr.sh
new file mode 100644
index 00000000..897c1a01
--- /dev/null
+++ b/bin/clwr.sh
@@ -0,0 +1,23 @@
+# Write lines of terminal input into a file, clearing in between each one
+self=clwr
+
+# Check our inputs for sanity
+if [ "$#" -ne 1 ] ; then
+ printf >&2 '%s: Need output file\n' "$self"
+ exit 2
+elif ! [ -t 0 ] ; then
+ printf >&2 '%s: stdin not a terminal\n' "$self"
+ exit 2
+elif ! [ -t 1 ] ; then
+ printf >&2 '%s: stdout not a terminal\n' "$self"
+ exit 2
+fi
+
+# Open a file descriptor onto the output file to save on open(2)/close(2)
+# system calls
+exec 3>"$1" || exit
+
+# Start looping through clearing and accepting lines
+while { tput clear && IFS= read -r line ; } ; do
+ printf '%s\n' "$line" >&3
+done