1 files changed, 121 insertions, 0 deletions
diff --git a/main.c b/main.c
new file mode 100644
index 00000000..c4b38cd4
--- /dev/null
+++ b/main.c
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+/* vi: set ts=4 :*/
+/* Toybox infrastructure.
+ *
+ * Copyright 2006 Rob Landley <rob@landley.net>
+ *
+ * Licensed under GPL version 2, see file LICENSE in this tarball for details.
+ */
+
+#include "toys.h"
+
+// The monster fun applet list.
+
+struct toy_list toy_list[] = {
+	// This one is out of order on purpose.
+	{"toybox", toybox_main, 0},
+	// The rest of these are alphabetical, for binary search.
+	{"cd", cd_main, TOYFLAG_NOFORK},
+	{"df", df_main, TOYFLAG_USR|TOYFLAG_SBIN},
+	{"exit", exit_main, TOYFLAG_NOFORK},
+	{"sh", toysh_main, TOYFLAG_BIN},
+	{"toysh", toysh_main, TOYFLAG_BIN}
+};
+
+#define TOY_LIST_LEN (sizeof(toy_list)/sizeof(struct toy_list))
+
+// global context for this applet.
+
+struct toy_context toys;
+
+struct toy_list *toy_find(char *name)
+{
+	int top, bottom, middle;
+
+	// If the name starts with "toybox", accept that as a match.  Otherwise
+	// skip the first entry, which is out of order.
+
+	if (!strncmp(name,"toybox",6)) return toy_list;
+	bottom = 1;
+
+	// Binary search to find this applet.
+
+	top = TOY_LIST_LEN-1;
+	for (;;) {
+		int result;
+		
+		middle = (top+bottom)/2;
+		if (middle<bottom || middle>top) return NULL;
+		result = strcmp(name,toy_list[middle].name);
+		if (!result) return toy_list+middle;
+		if (result<0) top=--middle;
+		else bottom = ++middle;
+	}
+}
+
+void toy_init(struct toy_list *which, char *argv[])
+{
+	// Free old toys contents here?
+
+	toys.which = which;
+	toys.argv = argv;
+	toys.exitval = 1;
+}
+
+// Run a toy.
+void toy_exec(char *argv[])
+{
+	struct toy_list *which;
+	
+	which = toy_find(argv[0]);
+	if (!which) return;
+
+	toy_init(which, argv);
+	
+	exit(toys.which->toy_main());
+}
+
+int toybox_main(void)
+{
+	static char *toy_paths[]={"usr/","bin/","sbin/",0};
+	int i, len = 0;
+
+	if (toys.argv[1]) {
+		if (toys.argv[1][0]!='-') {
+			toy_exec(toys.argv+1);
+			error_exit("No behavior for %s\n",toys.argv[1]);
+		}
+	}
+
+	// Output list of applets.
+	for (i=1; i<TOY_LIST_LEN; i++) {
+		int fl = toy_list[i].flags;
+		if (fl & TOYMASK_LOCATION) {
+			if (toys.argv[1]) {
+				int j;
+				for (j=0; toy_paths[j]; j++)
+					if (fl & (1<<j)) len += printf("%s", toy_paths[j]);
+			}
+			len += printf("%s ",toy_list[i].name);
+			if (len>65) {
+				putchar('\n');
+				len=0;
+			}
+		}
+	}
+	putchar('\n');
+	return 0;
+}
+
+int main(int argc, char *argv[])
+{
+	char *name;
+
+	// Figure out which applet to call.
+	name = rindex(argv[0], '/');
+	if (!name) name=argv[0];
+	else name++;
+	argv[0] = name;
+
+	toys.argv = argv-1;
+	return toybox_main();
+}