diff -uNr a/vtools/manifest b/vtools/manifest
--- a/vtools/manifest 5e11d4d3daca9f3d116806cbab37f38ce17fb6876cff7aa05f2f47b4e3055ce0117de27c02dae4b8c4741307f888266d678c8934cf63867b35f29dddc6d48c5e
+++ b/vtools/manifest 35a57f6c4eaad4c3084874e6f97aceba39d8b54879b41a1498988fc45015bc618e72400887accc694e164f9704ecb33a8db29c6d135ea9880ec1345402eafda9
@@ -15,3 +15,4 @@
 615638 bvt vtools_add_vsh_utils Add utilities required by v-presser.
 617378 bvt vtools_vsh_utils_one_binary Merge all v.sh Ada utilities into one.
 617638 bvt vtools_vsh_ada_vfilter Add an implementation of vfilter in Ada.
+619714 bvt vtools_vsh_shellcheck A round of shellcheck on the v.sh source.
diff -uNr a/vtools/v.sh b/vtools/v.sh
--- a/vtools/v.sh 2c3cf57471f96dbe84d4eb5827f6360c5cda5ae5bfca8c08e8656393e6b53581c23d04b28b182b135b3482efac49d5a324714f4cb7b510ba576bc1abd96d68dc
+++ b/vtools/v.sh 535fd4d5c7268d52140490ddb24d4ada36a3269b5d285c98da2db542b6c0fe52a844e6c273fcb1ee9d6c45c04e2fdb82e48285e4e970485da5daa86c6c578e8e
@@ -39,7 +39,7 @@
 	checkdir wot
 	for i in wot/*.asc; do
 		gpg --homedir "$vgpgdir" --logger-fd 1 --batch \
-		--keyid-format=long --import $i >/dev/null 2>&1
+		--keyid-format=long --import "$i" >/dev/null 2>&1
 	done
 }
 
@@ -52,22 +52,22 @@
 trap cleanup TERM INT
 
 exit_msg() {
-	echo $1
+	echo "$1"
 	cleanup
 }
 
 verify() {
 	vpatchpath="$1"
-	vpatch="$(basename $vpatchpath)"
+	vpatch=$(basename "$vpatchpath")
 	signers=""
 
 	checkdir seals
 	for i in seals/$vpatch.*.sig; do
-		signature="$(basename $i | sed 's/.sig$//g')"
+		signature=$(basename "$i" | sed 's/.sig$//g')
 		signer="${signature#$vpatch.}"
 		if ! gpg --homedir "$vgpgdir" --logger-fd 1 --batch \
 			--keyid-format=long \
-			--verify "$i" "$vpatchpath" 2>&1 >/dev/null; then
+			--verify "$i" "$vpatchpath" >/dev/null 2>&1; then
 			exit_msg "Bad signature $i for $vpatch"
 		fi
 		signers="$signers $signer"
@@ -81,7 +81,7 @@
 verifyall() {
 	checkdir patches
 	for i in patches/*.vpatch; do
-		verify $i;
+		verify "$i";
 	done
 }
 
@@ -116,8 +116,7 @@
 vpatchflow() {
 	[ -z "$*" ] && exit_msg "No leaves selected."
 	filterall | internall >"$filtered"
-	selected=""
-	if [ "$*" == "-" ]; then
+	if [ "$*" = "-" ]; then
 		echo "S" >"$selfile"
 	else
 		echo $* | tr ' ' '\n' | vpatchnos | sed -e 's/^/s /g' - >"$selfile"
@@ -152,19 +151,19 @@
 
 loadwot
 
-if [ "$1" == "wot" ]; then
+if [ "$1" = "wot" ]; then
 	gpg --homedir "$vgpgdir" --logger-fd 1 --batch --keyid-format=long -k
 	cleanup
 fi
 
 verifyall
 
-if [ "$1" == "patches" ]; then
+if [ "$1" = "patches" ]; then
 	cat "$vgpgdir"/signers.txt
 	cleanup
 fi
 
-if [ "$1" == "graph" ]; then
+if [ "$1" = "graph" ]; then
 	shift
 	dotfile="$1"
 	shift
@@ -181,12 +180,12 @@
 FILENAME=="-" && $1 == "d" {print "\""a[$3]"\" -> \""a[$2]"\""}
 ' "$vpatches" - <"$topo" >>"$dotfile"
 	echo "}" >> "$dotfile"
-	dot -Tsvg $dotfile -o $svgfile
+	dot -Tsvg "$dotfile" -o "$svgfile"
 	# dot -Tcmapx $dotfile -o $svgfile.html-map
 	cleanup
 fi
 
-if [ "$1" == "antecedents" ]; then
+if [ "$1" = "antecedents" ]; then
 	shift
 	vpatch="$1"
 	shift
@@ -200,7 +199,7 @@
 	cleanup
 fi
 
-if [ "$1" == "descendants" ]; then
+if [ "$1" = "descendants" ]; then
 	shift
 	vpatch="$1"
 	shift
@@ -214,7 +213,7 @@
 	cleanup
 fi
 
-if [ "$1" == "origin" ]; then
+if [ "$1" = "origin" ]; then
 	shift
 	hash="$1"
 	shift
@@ -224,7 +223,7 @@
 	cleanup
 fi;
 
-if [ "$1" == "flow" ]; then
+if [ "$1" = "flow" ]; then
 	shift
 
 	vpatchflow $*
@@ -236,7 +235,7 @@
 	cleanup
 fi
 
-if [ "$1" == "press" ]; then
+if [ "$1" = "press" ]; then
 	shift
 	dir="$1"
 	shift
@@ -248,7 +247,7 @@
 	vpatchflowerr
 
 	awk '$1 == "P" {print $2}' < "$topo" | vpatchnames | while read i; do
-		i=$(readlink -f $i)
+		i=$(readlink -f "$i")
 		cd "$dir"
 		vpatch <"$i" >/dev/null
 		cd - >/dev/null