Mercurial > hg > toybox
annotate main.c @ 21:6475d6c46066
Add pwd. Consolidate toy list information under toylist.h.
author | Rob Landley <rob@landley.net> |
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date | Sat, 04 Nov 2006 17:45:18 -0500 |
parents | 3981c96f9285 |
children | eb46bb5626cb |
rev | line source |
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1 /* vi: set ts=4 :*/ |
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2 /* Toybox infrastructure. |
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3 * |
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4 * Copyright 2006 Rob Landley <rob@landley.net> |
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5 */ |
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6 |
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7 #include "toys.h" |
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8 |
21
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9 // Populate toy_list[]. |
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10 |
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11 struct toy_list toy_list[] = { |
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12 #define FROM_MAIN |
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13 #include "toys/toylist.h" |
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14 }; |
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16 #define TOY_LIST_LEN (sizeof(toy_list)/sizeof(struct toy_list)) |
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17 |
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18 // global context for this applet. |
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19 |
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20 struct toy_context toys; |
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21 |
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22 struct toy_list *toy_find(char *name) |
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23 { |
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24 int top, bottom, middle; |
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25 |
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26 // If the name starts with "toybox", accept that as a match. Otherwise |
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27 // skip the first entry, which is out of order. |
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28 |
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29 if (!strncmp(name,"toybox",6)) return toy_list; |
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30 bottom = 1; |
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31 |
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32 // Binary search to find this applet. |
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33 |
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34 top = TOY_LIST_LEN-1; |
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35 for (;;) { |
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36 int result; |
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37 |
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38 middle = (top+bottom)/2; |
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39 if (middle<bottom || middle>top) return NULL; |
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40 result = strcmp(name,toy_list[middle].name); |
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41 if (!result) return toy_list+middle; |
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42 if (result<0) top=--middle; |
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43 else bottom = ++middle; |
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44 } |
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45 } |
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46 |
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47 void toy_init(struct toy_list *which, char *argv[]) |
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48 { |
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49 // Free old toys contents here? |
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50 |
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51 toys.which = which; |
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52 toys.argv = argv; |
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53 toys.exitval = 1; |
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54 } |
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55 |
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56 // Run a toy. |
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57 void toy_exec(char *argv[]) |
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58 { |
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59 struct toy_list *which; |
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60 |
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61 which = toy_find(argv[0]); |
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62 if (!which) return; |
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63 |
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64 toy_init(which, argv); |
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65 |
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66 exit(toys.which->toy_main()); |
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67 } |
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68 |
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69 int toybox_main(void) |
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70 { |
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71 static char *toy_paths[]={"usr/","bin/","sbin/",0}; |
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72 int i, len = 0; |
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73 |
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74 if (toys.argv[1]) { |
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75 if (toys.argv[1][0]!='-') { |
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76 toy_exec(toys.argv+1); |
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77 error_exit("No behavior for %s\n",toys.argv[1]); |
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78 } |
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79 } |
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80 |
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81 // Output list of applets. |
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82 for (i=1; i<TOY_LIST_LEN; i++) { |
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83 int fl = toy_list[i].flags; |
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84 if (fl & TOYMASK_LOCATION) { |
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85 if (toys.argv[1]) { |
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86 int j; |
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87 for (j=0; toy_paths[j]; j++) |
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88 if (fl & (1<<j)) len += printf("%s", toy_paths[j]); |
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89 } |
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90 len += printf("%s ",toy_list[i].name); |
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91 if (len>65) { |
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92 putchar('\n'); |
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93 len=0; |
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94 } |
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95 } |
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96 } |
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97 putchar('\n'); |
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98 return 0; |
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99 } |
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100 |
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101 int main(int argc, char *argv[]) |
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102 { |
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103 char *name; |
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104 |
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105 // Figure out which applet to call. |
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106 name = rindex(argv[0], '/'); |
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107 if (!name) name=argv[0]; |
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108 else name++; |
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109 argv[0] = name; |
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110 |
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111 toys.argv = argv-1; |
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112 return toybox_main(); |
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113 } |