From e83d1023bfe1456a11c682e5980d8c76c227232e Mon Sep 17 00:00:00 2001
From: bapt <bapt@FreeBSD.org>
Date: Wed, 25 Apr 2018 20:52:17 +0000
Subject: [PATCH] zgrep: small improvements

* Use slightly more efficient method to determine the name of the program
called [1]
* Use nicer form to loop over arguments [1]
* add special support for --version along with -V previously added by kevans

Reported by:	jilles@ [1]
---
 usr.bin/grep/zgrep.sh | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/usr.bin/grep/zgrep.sh b/usr.bin/grep/zgrep.sh
index 347d4ee9f720..1f24ec897914 100755
--- a/usr.bin/grep/zgrep.sh
+++ b/usr.bin/grep/zgrep.sh
@@ -34,7 +34,7 @@ grep_args=""
 hyphen=0
 silent=0
 
-prg=$(basename $0)
+prg=${0##*/}
 
 # handle being called 'zegrep' or 'zfgrep'
 case ${prg} in
@@ -106,9 +106,8 @@ do
 	    silent=1
 	    shift
 	    ;;
-	-V)
-	    ${grep} -V
-	    exit $?
+	-V|--version)
+	    exec ${grep} -V
 	    ;;
 	-*)
 	    grep_args="${grep_args} $1"
@@ -145,9 +144,8 @@ else
     if [ ${silent} -lt 1 -a $# -gt 1 ]; then
 	grep_args="-H ${grep_args}"
     fi
-    while [ $# -gt 0 ]
-    do
-	${cattool} ${catargs} -- "$1" | ${grep} --label="${1}" ${grep_args} -- "${pattern}" -
+    for file do
+	${cattool} ${catargs} -- "${file}" | ${grep} --label="${file}" ${grep_args} -- "${pattern}" -
 	shift
     done
 fi