1 files changed, 37 insertions, 0 deletions
diff --git a/include/shell.sh b/include/shell.sh
new file mode 100644
index 0000000..6389304
--- /dev/null
+++ b/include/shell.sh
@@ -0,0 +1,37 @@
+getvar() {
+	eval "echo \"\${$1}\""
+}
+
+var2file() {
+	local var
+	eval "var=\"\${$1}\""
+	if [ -n "$var" ]; then echo "$var" > "$2"; fi
+}
+
+isset() {
+	local var
+	eval "var=\"\${$1}\""
+	[ -n "$var" ]
+}
+
+trapret() {(
+	local retvals="$1"; shift
+	local cmd="$1"; shift
+	for retval in $(echo $retvals); do
+		local trap_$retval=1
+	done
+	"$cmd" "$@" || {
+		local retval="$?"
+		eval "trapped=\${trap_$retval}"
+		[ -n "$trapped" ] || {
+			return $retval
+		}
+	}
+)}
+
+md5s() {
+	cat "$@" | (
+		md5sum 2>/dev/null ||
+		md5
+	) | awk '{print $1}'
+}