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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;
for (toys.argc = 0; argv[toys.argc]; toys.argc++);
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();
}
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