Fix -A flag when askpass is specified in sudo.conf or if sudo doesn't need

to read a password.

src/load_plugins.c

@@ -45,9 +45,6 @@
 #include "sudo_plugin.h"
 #include "sudo_plugin_int.h"
 
-/* tgetpass.c */
-extern const char *askpass_path;
-
 /*
  * Read in /etc/sudo.conf
  * Returns a list of plugins.

src/parse_args.c

@@ -363,11 +363,6 @@ parse_args(int argc, char **argv, int *nargc, char ***nargv, char ***settingsp,
 	sudo_settings[ARG_IMPLIED_SHELL].value = "true";
     }
 
-#ifndef _PATH_SUDO_ASKPASS
-    if (ISSET(tgetpass_flags, TGP_ASKPASS) && !getenv("SUDO_ASKPASS"))
-	errorx(1, "no askpass program specified, try setting SUDO_ASKPASS");
-#endif
-
     if (mode == MODE_HELP)
 	usage(0);
 

src/sudo.c

@@ -138,12 +138,12 @@ main(int argc, char *argv[], char *envp[])
     memset(&user_details, 0, sizeof(user_details));
     user_info = get_user_info(&user_details);
 
-    /* Parse command line arguments. */
-    sudo_mode = parse_args(argc, argv, &nargc, &nargv, &settings, &env_add);
-
     /* Read sudo.conf and load plugins. */
     sudo_load_plugins(_PATH_SUDO_CONF, &policy_plugin, &io_plugins);
 
+    /* Parse command line arguments. */
+    sudo_mode = parse_args(argc, argv, &nargc, &nargv, &settings, &env_add);
+
     /* Open policy plugin. */
     ok = policy_plugin.u.policy->open(SUDO_API_VERSION, sudo_conversation,
 	_sudo_printf, settings, user_info, envp);

src/sudo.h

@@ -157,6 +157,7 @@ void cleanup(int);
 /* tgetpass.c */
 char *tgetpass(const char *, int, int);
 int tty_present(void);
+extern const char *askpass_path;
 
 /* zero_bytes.c */
 void zero_bytes(volatile void *, size_t);

src/tgetpass.c

@@ -101,7 +101,8 @@ tgetpass(const char *prompt, int timeout, int flags)
 
     /* If using a helper program to get the password, run it instead. */
     if (ISSET(flags, TGP_ASKPASS)) {
-	if (askpass && *askpass)
+	if (askpass == NULL || *askpass == '\0')
+	    errorx(1, "no askpass program specified, try setting SUDO_ASKPASS");
 	return(sudo_askpass(askpass, prompt));
     }