forgot to add libbb/get_shell_name.c

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

diff --git a/libbb/get_shell_name.c b/libbb/get_shell_name.c
new file mode 100644 (file)
index 0000000..c930afd
--- /dev/null
+++ b/libbb/get_shell_name.c
@@ -0,0 +1,25 @@
+/*
+ * Copyright 2011, Denys Vlasenko
+ *
+ * Licensed under GPLv2, see file LICENSE in this source tree.
+ */
+
+//kbuild:lib-y += get_shell_name.o
+
+#include "libbb.h"
+
+const char *get_shell_name(void)
+{
+       struct passwd *pw;
+       char *shell;
+
+       shell = getenv("SHELL");
+       if (shell && shell[0])
+               return shell;
+
+       pw = getpwuid(getuid());
+       if (pw && pw->pw_shell && pw->pw_shell[0])
+               return pw->pw_shell;
+
+       return DEFAULT_SHELL;
+}