libbb: move nuke_str() from passwd into libbb

[oweals/busybox.git] / libbb / setup_environment.c

diff --git a/libbb/setup_environment.c b/libbb/setup_environment.c
index a95fbc5bfc4da7dd967fea91720f2c50ecf1619d..4258656fea2212bc61dc32d57747b9c48d41d40e 100644 (file)
--- a/libbb/setup_environment.c
+++ b/libbb/setup_environment.c
@@ -32,11 +32,16 @@
 
 void FAST_FUNC setup_environment(const char *shell, int flags, const struct passwd *pw)
 {
+       if (!shell || !shell[0])
+               shell = DEFAULT_SHELL;
+
        /* Change the current working directory to be the home directory
         * of the user */
-       if (chdir(pw->pw_dir)) {
-               xchdir((flags & SETUP_ENV_TO_TMP) ? "/tmp" : "/");
-               bb_error_msg("can't chdir to home directory '%s'", pw->pw_dir);
+       if (!(flags & SETUP_ENV_NO_CHDIR)) {
+               if (chdir(pw->pw_dir) != 0) {
+                       bb_error_msg("can't change directory to '%s'", pw->pw_dir);
+                       xchdir((flags & SETUP_ENV_TO_TMP) ? "/tmp" : "/");
+               }
        }
 
        if (flags & SETUP_ENV_CLEARENV) {