From 1a4ab483a2a41160e548e799609f964a7a6f3400 Mon Sep 17 00:00:00 2001
From: Andre Noll <maan@tuebingen.mpg.de>
Date: Sun, 13 Aug 2017 01:02:17 +0200
Subject: [PATCH] server: Constify return value of lookup_user().

Command handlers only need to read this structure.
---
 command.c   | 2 +-
 command.h   | 2 +-
 user_list.c | 4 ++--
 user_list.h | 2 +-
 4 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/command.c b/command.c
index a72a524f..74e13635 100644
--- a/command.c
+++ b/command.c
@@ -784,7 +784,7 @@ struct connection_features {
 	int dummy; /* none at the moment */
 };
 
-static int parse_auth_request(char *buf, int len, struct user **u,
+static int parse_auth_request(char *buf, int len, const struct user **u,
 		struct connection_features *cf)
 {
 	int ret;
diff --git a/command.h b/command.h
index 0265f056..a7fa4673 100644
--- a/command.h
+++ b/command.h
@@ -3,7 +3,7 @@
 /** Per connection data available to command handlers. */
 struct command_context {
 	/** The paraslash user that executes this command. */
-	struct user *u;
+	const struct user *u;
 	/** File descriptor and crypto keys. */
 	struct stream_cipher_context scc;
 };
diff --git a/user_list.c b/user_list.c
index e4866029..cf53c0fa 100644
--- a/user_list.c
+++ b/user_list.c
@@ -127,9 +127,9 @@ void init_user_list(char *user_list_file)
  * \return A pointer to the corresponding user struct if the user was found, \p
  * NULL otherwise.
  */
-struct user *lookup_user(const char *name)
+const struct user *lookup_user(const char *name)
 {
-	struct user *u;
+	const struct user *u;
 	list_for_each_entry(u, &user_list, node) {
 		if (strcmp(u->name, name))
 			continue;
diff --git a/user_list.h b/user_list.h
index 41fad164..e4fbd466 100644
--- a/user_list.h
+++ b/user_list.h
@@ -33,4 +33,4 @@ struct user {
 };
 
 void init_user_list(char *user_list_file);
-struct user *lookup_user(const char *name);
+const struct user *lookup_user(const char *name);
-- 
2.39.2