1 files changed, 148 insertions, 0 deletions
diff --git a/applets/busybox.c b/applets/busybox.c
new file mode 100644
index 000000000..bb9eb3af7
--- /dev/null
+++ b/applets/busybox.c
@@ -0,0 +1,148 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * BusyBox' main applet dispatcher.
+ *
+ * Licensed under GPLv2, see file LICENSE in this tarball for details.
+ */
+#include "busybox.h"
+
+const char *applet_name ATTRIBUTE_EXTERNALLY_VISIBLE;
+
+#ifdef CONFIG_FEATURE_INSTALLER
+/*
+ * directory table
+ *		this should be consistent w/ the enum, busybox.h::Location,
+ *		or else...
+ */
+static const char usr_bin [] ="/usr/bin";
+static const char usr_sbin[] ="/usr/sbin";
+
+static const char* const install_dir[] = {
+	&usr_bin [8], /* "", equivalent to "/" for concat_path_file() */
+	&usr_bin [4], /* "/bin" */
+	&usr_sbin[4], /* "/sbin" */
+	usr_bin,
+	usr_sbin
+};
+
+/* abstract link() */
+typedef int (*__link_f)(const char *, const char *);
+
+/* create (sym)links for each applet */
+static void install_links(const char *busybox, int use_symbolic_links)
+{
+	__link_f Link = link;
+
+	char *fpc;
+	int i;
+	int rc;
+
+	if (use_symbolic_links)
+		Link = symlink;
+
+	for (i = 0; applets[i].name != NULL; i++) {
+		fpc = concat_path_file(
+			install_dir[applets[i].location], applets[i].name);
+		rc = Link(busybox, fpc);
+		if (rc!=0 && errno!=EEXIST) {
+			bb_perror_msg("%s", fpc);
+		}
+		free(fpc);
+	}
+}
+
+#else
+#define install_links(x,y)
+#endif /* CONFIG_FEATURE_INSTALLER */
+
+int main(int argc, char **argv)
+{
+	const char *s;
+
+	applet_name=argv[0];
+	if (*applet_name == '-') applet_name++;
+	for (s = applet_name; *s ;)
+		if (*(s++) == '/') applet_name = s;
+
+	/* Set locale for everybody except 'init' */
+	if (ENABLE_LOCALE_SUPPORT && getpid() != 1)
+		setlocale(LC_ALL, "");
+
+	run_applet_by_name(applet_name, argc, argv);
+	bb_error_msg_and_die("applet not found");
+}
+
+int busybox_main(int argc, char **argv)
+{
+	/*
+	 * This style of argument parsing doesn't scale well
+	 * in the event that busybox starts wanting more --options.
+	 * If someone has a cleaner approach, by all means implement it.
+	 */
+	if (ENABLE_FEATURE_INSTALLER && argc > 1 && !strcmp(argv[1], "--install")) {
+		int use_symbolic_links = 0;
+		int rc = 0;
+		char *busybox;
+
+		/* to use symlinks, or not to use symlinks... */
+		if (argc > 2) {
+			if ((strcmp(argv[2], "-s") == 0)) {
+				use_symbolic_links = 1;
+			}
+		}
+
+		/* link */
+// XXX: FIXME: this is broken. Why not just use argv[0] ?
+		busybox = xreadlink("/proc/self/exe");
+		if (busybox) {
+			install_links(busybox, use_symbolic_links);
+			free(busybox);
+		} else {
+			rc = 1;
+		}
+		return rc;
+	}
+
+	/* Deal with --help.  (Also print help when called with no arguments) */
+
+	if (argc==1 || !strcmp(argv[1],"--help") ) {
+		if (argc>2) {
+			applet_name = argv[2];
+			run_applet_by_name(applet_name, 2, argv);
+		} else {
+			const struct BB_applet *a;
+			int col, output_width;
+
+			if (ENABLE_FEATURE_AUTOWIDTH) {
+				/* Obtain the terminal width.  */
+				get_terminal_width_height(0, &output_width, NULL);
+				/* leading tab and room to wrap */
+				output_width -= sizeof("start-stop-daemon, ") + 8;
+			} else output_width = 80 - sizeof("start-stop-daemon, ") - 8;
+
+			printf("%s\n"
+			       "Copyright (C) 1998-2006  Erik Andersen, Rob Landley, and others.\n"
+			       "Licensed under GPLv2.  See source distribution for full notice.\n\n"
+			       "Usage: busybox [function] [arguments]...\n"
+			       "   or: [function] [arguments]...\n\n"
+			       "\tBusyBox is a multi-call binary that combines many common Unix\n"
+			       "\tutilities into a single executable.  Most people will create a\n"
+			       "\tlink to busybox for each function they wish to use and BusyBox\n"
+			       "\twill act like whatever it was invoked as!\n"
+			       "\nCurrently defined functions:\n", bb_msg_full_version);
+
+			col=0;
+			for(a = applets; a->name;) {
+				col += printf("%s%s", (col ? ", " : "\t"), (a++)->name);
+				if (col > output_width && a->name) {
+					printf(",\n");
+					col = 0;
+				}
+			}
+			printf("\n\n");
+			exit(0);
+		}
+	} else run_applet_by_name(argv[1], argc-1, argv+1);
+
+	bb_error_msg_and_die("applet not found");
+}