Enhance rgl(1df) with a bit of color and sanity

1 files changed, 18 insertions, 5 deletions

diff --git a/bin/rgl b/bin/rgl
index 03f1ba71..4f783d9d 100755
--- a/bin/rgl
+++ b/bin/rgl
@@ -1,17 +1,30 @@
 #!/bin/sh
 # Read grep(1) patterns from input and search for them in the given files
+self=rgl
 
 # Check the arguments
 if [ "$#" -eq 0 ] ; then
-    printf >&2 'rgl: Need at least one filename\n'
+    printf >&2 '%s: Need at least one filename\n' "$self"
     exit 2
 fi
 
-# Iterate over the patterns and search for each one; if the input is a terminal
-# include a slash prompt for the next pattern
+# Iterate over the patterns and search for each one
 while { 
-    [ -t 0 ] && printf /
-    read -r pat
+
+    # If the input is a terminal, print a slash prompt for the next pattern;
+    # try to print it in bold red, too, but discard stderr if we can't
+    if [ -t 0 ] ; then
+        tput setaf 1 || tput AF 1
+        tput bold || tput md
+        printf '%s/' "$self"
+        tput sgr0 || tput me
+    fi 2>/dev/null
+
+    # Read the pattern
+    IFS= read -r pat
+
 } ; do
+
+    # Run grep(1) with the read pattern over the arguments
     grep -- "$pat" "$@"
 done