-int pgp_use_gpg_agent (void)
-{
- return option (OPTUSEGPGAGENT) && getenv ("GPG_TTY")
- && getenv ("GPG_AGENT_INFO");
+int pgp_use_gpg_agent (void) {
+ char *tty;
+
+ if (!option (OPTUSEGPGAGENT) || !getenv ("GPG_AGENT_INFO"))
+ return 0;
+
+ if ((tty = ttyname(0)))
+ setenv ("GPG_TTY", tty, 0);
+
+ return 1;