| /* 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}, |
| {"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; |
| } |
| } |
| |
| // Run a toy. |
| void toy_exec(char *argv[]) |
| { |
| struct toy_list *which; |
| |
| which = toy_find(argv[0]); |
| if (!which) return; |
| |
| // Free old toys contents here? |
| |
| toys.which = which; |
| toys.argv = argv; |
| for (toys.argc = 0; argv[toys.argc]; toys.argc++); |
| toys.exitval = 1; |
| |
| 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(); |
| } |