landley | 13bab2f | 2006-09-27 00:45:05 -0400 | [diff] [blame] | 1 | /* vi: set ts=4 :*/ |
| 2 | /* Toybox infrastructure. |
| 3 | * |
| 4 | * Copyright 2006 Rob Landley <rob@landley.net> |
| 5 | * |
| 6 | * Licensed under GPL version 2, see file LICENSE in this tarball for details. |
| 7 | */ |
| 8 | |
landley | c562150 | 2006-09-28 17:18:51 -0400 | [diff] [blame^] | 9 | #include "toys.h" |
| 10 | |
| 11 | // The monster fun applet list. |
| 12 | |
| 13 | struct toy_list toy_list[] = { |
| 14 | {"toybox", toybox_main}, |
| 15 | {"df", df_main}, |
| 16 | {"toysh", toysh_main} |
| 17 | }; |
| 18 | |
| 19 | // global context for this applet. |
| 20 | |
| 21 | struct toy_context toys; |
| 22 | |
| 23 | |
landley | 13bab2f | 2006-09-27 00:45:05 -0400 | [diff] [blame] | 24 | |
| 25 | /* |
| 26 | name |
| 27 | main() |
| 28 | struct |
| 29 | usage (short long example info) |
| 30 | path (/usr/sbin) |
| 31 | */ |
| 32 | |
| 33 | int toybox_main(void) |
| 34 | { |
| 35 | printf("toybox\n"); |
| 36 | return 0; |
| 37 | } |
| 38 | |
| 39 | int toysh_main(void) |
| 40 | { |
| 41 | printf("toysh\n"); |
| 42 | } |
| 43 | |
landley | 13bab2f | 2006-09-27 00:45:05 -0400 | [diff] [blame] | 44 | struct toy_list *find_toy_by_name(char *name) |
| 45 | { |
| 46 | int top, bottom, middle; |
| 47 | |
| 48 | // If the name starts with "toybox", accept that as a match. Otherwise |
| 49 | // skip the first entry, which is out of order. |
| 50 | |
| 51 | if (!strncmp(name,"toybox",6)) return toy_list; |
| 52 | bottom=1; |
| 53 | |
| 54 | // Binary search to find this applet. |
| 55 | |
| 56 | top=(sizeof(toy_list)/sizeof(struct toy_list))-1; |
| 57 | for(;;) { |
| 58 | int result; |
| 59 | |
| 60 | middle=(top+bottom)/2; |
| 61 | if(middle<bottom || middle>top) return NULL; |
| 62 | result = strcmp(name,toy_list[middle].name); |
| 63 | if(!result) return toy_list+middle; |
| 64 | if(result<0) top=--middle; |
| 65 | else bottom=++middle; |
| 66 | } |
| 67 | } |
| 68 | |
| 69 | int main(int argc, char *argv[]) |
| 70 | { |
| 71 | char *name; |
| 72 | |
| 73 | // Record command line arguments. |
| 74 | toys.argc = argc; |
| 75 | toys.argv = argv; |
| 76 | |
| 77 | // Figure out which applet got called. |
| 78 | name = rindex(argv[0],'/'); |
| 79 | if (!name) name = argv[0]; |
| 80 | else name++; |
| 81 | toys.which = find_toy_by_name(name); |
| 82 | |
| 83 | if (!toys.which) { |
| 84 | dprintf(2,"No behavior for %s\n",name); |
| 85 | return 1; |
| 86 | } |
| 87 | return toys.which->toy_main(); |
| 88 | } |