+ if (applet->need_suid == _BB_SUID_ALWAYS) {
+ if (geteuid () != 0)
+ bb_error_msg_and_die ("This applet requires root priviledges!");
+ } else if (applet->need_suid == _BB_SUID_NEVER) {
+ setgid (rgid); /* drop all priviledges */
+ setuid (ruid);
+ }
+}
+#else
+#define check_suid(x)
+#endif /* CONFIG_FEATURE_SUID */
+
+
+
+
+
+extern void bb_show_usage (void)
+{
+ const char *format_string;
+ const char *usage_string = usage_messages;
+ int i;
+
+ for (i = applet_using - applets; i > 0;) {
+ if (!*usage_string++) {
+ --i;
+ }
+ }
+
+ format_string = "%s\n\nUsage: %s %s\n\n";
+ if (*usage_string == '\b')
+ format_string = "%s\n\nNo help available.\n\n";
+ fprintf (stderr, format_string, bb_msg_full_version, applet_using->name,
+ usage_string);
+
+ exit (EXIT_FAILURE);
+}
+
+static int applet_name_compare (const void *x, const void *y)
+{
+ const char *name = x;
+ const struct BB_applet *applet = y;
+
+ return strcmp (name, applet->name);
+}
+
+extern const size_t NUM_APPLETS;
+
+struct BB_applet *find_applet_by_name (const char *name)
+{
+ return bsearch (name, applets, NUM_APPLETS, sizeof (struct BB_applet),
+ applet_name_compare);
+}
+
+void run_applet_by_name (const char *name, int argc, char **argv)
+{
+ if(ENABLE_FEATURE_SUID_CONFIG) parse_config_file ();
+
+ if(!strncmp(name, "busybox", 7)) busybox_main(argc, argv);
+ /* Do a binary search to find the applet entry given the name. */
+ applet_using = find_applet_by_name(name);
+ if(applet_using) {
+ bb_applet_name = applet_using->name;
+ if(argc==2 && !strcmp(argv[1], "--help")) bb_show_usage ();
+ if(ENABLE_FEATURE_SUID) check_suid (applet_using);
+ exit ((*(applet_using->main)) (argc, argv));
+ }
+}
+
+