csh/rc: Only exec Zsh when it's available.

diff --git a/csh/rc b/csh/rc
index 597f47a07b0f4a83c4edd213e32219523b2de815..0fdc66a26d4288a1bb2ec8030e61db1ddf306b4f 100644 (file)
--- a/csh/rc
+++ b/csh/rc
@@ -1,6 +1,6 @@
 # Csh configuration file.
 
-# Copyright (C) 2011-2012  Simon Ruderich
+# Copyright (C) 2011-2013  Simon Ruderich
 #
 # This file is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -16,10 +16,11 @@
 # along with this file.  If not, see <http://www.gnu.org/licenses/>.
 
 
-# Start Zsh in interactive login mode, otherwise do nothing. -l is used so Zsh
-# sources .zlogin and .zlogout.
+# Start Zsh in interactive login mode if available, otherwise do nothing. -l
+# is used so Zsh sources .zlogin and .zlogout.
 if ($?prompt) then
-    exec zsh -l
+    # csh doesn't use `type` .. yeah POSIX.
+    which zsh >/dev/null && exec zsh -l
 endif
 
 # vim: ft=csh