eget: add is_wildcard/is_query_string, replace grep in glob checks

eget

@@ -2444,7 +2444,7 @@ if [ -n "$INPUTFILE" ] ; then
 fi
 
 # https://www.freeoffice.com/download.php?filename=freeoffice-2021-1062.x86_64.rpm
-if [ -z "$NOGLOB" ] && echo "$URL" | grep -q -P "[*\[\]]" ; then
+if [ -z "$NOGLOB" ] && is_wildcard "$URL" && ! is_query_string "$URL" ; then
     fatal "Error: there are globbing symbol (*[]) in $URL. It is allowed only for mask part"
 fi
 
@@ -2474,13 +2474,18 @@ fi
 
 is_wildcard()
 {
-    echo "$1" | grep -q "[*?]" && return
-    echo "$1" | grep -q "\]" && return
-    echo "$1" | grep -q "\[" && return
+    case "$1" in *[*?]*|*\[*|*\]*) return 0 ;; esac
+    return 1
+}
+
+is_query_string()
+{
+    case "$1" in *\?*=*) return 0 ;; esac
+    return 1
 }
 
 # If there is no wildcard symbol like asterisk, just download
-if [ -z "$SEPMASK" ] && ! is_wildcard "$MASK" || echo "$MASK" | grep -q "[?].*="; then
+if [ -z "$SEPMASK" ] && ! is_wildcard "$MASK" || is_query_string "$MASK" ; then
     sget "$1" "$TARGETFILE"
     exit
 fi