Fix a segfault by only constructing the prompt when we need to. If we don't

do this we will segfault processing /etc/.profile since cwd isn't yet set.

1 files changed, 2 insertions, 2 deletions

diff --git a/shell/lash.c b/shell/lash.c
index dd1d3aa5c..3d54b439e 100644
--- a/shell/lash.c
+++ b/shell/lash.c
@@ -774,9 +774,9 @@ static int get_command(FILE * source, char *command)
                 return 1;
         }
 
-        prompt_str = setup_prompt_string(shell_context);
-        
         if (source == stdin) {
+                prompt_str = setup_prompt_string(shell_context);
+        
 #ifdef BB_FEATURE_SH_COMMAND_EDITING
                 /*
                 ** enable command line editing only while a command line