Add `Settings::nixDaemonSocketFile'.

src/libstore/globals.cc

@@ -10,6 +10,14 @@
 namespace nix {
 
 
+/* The default location of the daemon socket, relative to nixStateDir.
+   The socket is in a directory to allow you to control access to the
+   Nix daemon by setting the mode/ownership of the directory
+   appropriately.  (This wouldn't work on the socket itself since it
+   must be deleted and recreated on startup.) */
+#define DEFAULT_SOCKET_PATH "/daemon-socket/socket"
+
+
 Settings settings;
 
 
@@ -58,6 +66,7 @@ void Settings::processEnvironment()
     nixConfDir = canonPath(getEnv("NIX_CONF_DIR", NIX_CONF_DIR));
     nixLibexecDir = canonPath(getEnv("NIX_LIBEXEC_DIR", NIX_LIBEXEC_DIR));
     nixBinDir = canonPath(getEnv("NIX_BIN_DIR", NIX_BIN_DIR));
+    nixDaemonSocketFile = canonPath(nixStateDir + DEFAULT_SOCKET_PATH);
 
     string subs = getEnv("NIX_SUBSTITUTERS", "default");
     if (subs == "default") {

src/libstore/globals.hh

@@ -50,6 +50,9 @@ struct Settings {
     /* The directory where the main programs are stored. */
     Path nixBinDir;
 
+    /* File name of the socket the daemon listens to.  */
+    Path nixDaemonSocketFile;
+
     /* Whether to keep temporary directories of failed builds. */
     bool keepFailed;
 

src/libstore/remote-store.cc

@@ -91,7 +91,7 @@ void RemoteStore::connectToDaemon()
         throw SysError("cannot create Unix domain socket");
     closeOnExec(fdSocket);
 
-    string socketPath = settings.nixStateDir + DEFAULT_SOCKET_PATH;
+    string socketPath = settings.nixDaemonSocketFile;
 
     /* Urgh, sockaddr_un allows path names of only 108 characters.  So
        chdir to the socket directory so that we can pass a relative

src/libstore/worker-protocol.hh

@@ -53,14 +53,6 @@ typedef enum {
 #define STDERR_ERROR 0x63787470
 
 
-/* The default location of the daemon socket, relative to nixStateDir.
-   The socket is in a directory to allow you to control access to the
-   Nix daemon by setting the mode/ownership of the directory
-   appropriately.  (This wouldn't work on the socket itself since it
-   must be deleted and recreated on startup.) */
-#define DEFAULT_SOCKET_PATH "/daemon-socket/socket"
-
-
 Path readStorePath(Source & from);
 template<class T> T readStorePaths(Source & from);
 

src/nix-daemon/nix-daemon.cc

@@ -774,7 +774,7 @@ static void daemonLoop()
         if (fdSocket == -1)
             throw SysError("cannot create Unix domain socket");
 
-        string socketPath = settings.nixStateDir + DEFAULT_SOCKET_PATH;
+        string socketPath = settings.nixDaemonSocketFile;
 
         createDirs(dirOf(socketPath));