Fix a segfault in lash, hush, and cmdedit. Each of these used

xgetcwd, but did not check the return for a NULL, and then continued
to call strlen on the NULL when the cwd had been removed from under it.
 -Erik

2 files changed, 4 insertions, 0 deletions

diff --git a/libbb/libbb.h b/libbb/libbb.h
index 21af5688a..fde58b0a6 100644
--- a/libbb/libbb.h
+++ b/libbb/libbb.h
@@ -282,5 +282,6 @@ extern const char * const dash_dash_help;
 extern const char * const write_error;
 extern const char * const too_few_args;
 extern const char * const name_longer_than_foo;
+extern const char * const unknown;
 
 #endif /* __LIBBB_H__ */
diff --git a/libbb/messages.c b/libbb/messages.c
index 99c2bc9d5..910cb8fa2 100644
--- a/libbb/messages.c
+++ b/libbb/messages.c
@@ -58,4 +58,7 @@
 #ifdef L_name_longer_than_foo
         const char * const name_longer_than_foo = "Names longer than %d chars not supported.";
 #endif
+#ifdef L_unknown
+        const char * const unknown = "(unknown)";
+#endif