From: Junio C Hamano <junkio@cox.net>
Date: Tue, 13 Dec 2005 11:13:12 GMT
Subject: Re: [PATCH] [COGITO] make cg-tag use git-check-ref-format
Message-ID: <7vy82p9rnb.fsf@assigned-by-dhcp.cox.net>
In-Reply-To: <11344712912199-git-send-email-matlads@dsmagic.com>

Martin Atukunda <matlads@dsmagic.com> writes:

> The egrep pattern used by cg-tag is too restrictive. While it will prevent
> control characters from being specified as a tag name, it will also reject
> nearly anything written in a non-English language, as noted by -hpa
>...
> -(echo $name | egrep -qv '[^a-zA-Z0-9_.@!:-]') || \
> +git-check-ref-format $name || \
>  	die "name contains invalid characters"

Perhaps you meant to say:

	git-check-ref-format "$name"

instead; after all you are dealing with potentially garbage
input from the user here.

While you are at it, you might want to also quote $_git/refs/tags
immediately follows the part that you patched, and there is
another.

-- >8 --
[PATCH] cg-tag: shell variable quoting.

Scripts sometimes tend to be loose in variable quoting, and
often they are justifiable (e.g. the variables are already
validated before used unquoted); but when checking the input, we
should try to be strict.

Signed-off-by: Junio C Hamano <junkio@cox.net>
---

diff --git a/cg-tag b/cg-tag
index da4f2d5..1efb50d 100755
--- a/cg-tag
+++ b/cg-tag
@@ -28,7 +28,7 @@
 
 USAGE="cg-tag [-d DESCRIPTION] [-s [-k KEYNAME]] TAG_NAME [OBJECT_ID]"
 
-. ${COGITO_LIB}cg-Xlib || exit 1
+. "${COGITO_LIB}cg-Xlib" || exit 1
 
 sign=
 keyname=
@@ -54,10 +54,10 @@ id=$(cg-object-id -n "$id") || exit 1
 type=$(git-cat-file -t "$id")
 id=${id% *}
 
-(echo $name | egrep -qv '[^a-zA-Z0-9_.@!:-]') || \
-	die "name contains invalid characters"
+git-check-ref-format "$name" ||
+	die "name $name contains invalid characters"
 
-mkdir -p $_git/refs/tags
+mkdir -p "$_git/refs/tags"
 
 [ -s "$_git/refs/tags/$name" ] && die "tag already exists ($name)"
 [ "$id" ] || id="$(cat "$_git/$(git-symbolic-ref HEAD)")"
@@ -83,7 +83,7 @@ if [ "$sign" ]; then
 	fi
 	cat "$tagdir/tag.asc" >>"$tagdir/tag"
 fi
-if ! git-mktag <"$tagdir/tag" >$_git/refs/tags/$name; then
+if ! git-mktag <"$tagdir/tag" >"$_git/refs/tags/$name"; then
 	rm -rf "$tagdir"
 	die "error creating tag"
 fi