change `$_gpg_env` to default & replace running check

modules/gpg-agent/init.zsh

@@ -14,7 +14,7 @@ if (( ! $+commands[gpg-agent] )); then
 fi
 
 # Make sure to use the $GNUPGHOME first.
-_gpg_env="${GNUPGHOME:-$HOME/.gnupg}/gpg-agent.env"
+_gpg_env="${GNUPGHOME:-$HOME/.gnupg}/gpg-agent.info"
 
 function _gpg-agent-start {
   local ssh_support
@@ -34,9 +34,10 @@ function _gpg-agent-start {
 # Source GPG agent settings, if applicable.
 if [[ -s "${_gpg_env}" ]]; then
   source "${_gpg_env}" > /dev/null
-  ps -e | grep $(grep GPG_AGENT_INFO $_gpg_env | cut -d: -f 2) | grep -q gpg-agent ||
-    _gpg-agent-start
-  }
+  ps -U "$USER" -o 'command,pid' \
+  | grep "${${(@s.:.)GPG_AGENT_INFO}[2]}" \
+  | grep -q '^gpg-agent' \
+  ||  _gpg-agent-start
 else
   _gpg-agent-start
 fi