annotate main.c @ 21:6475d6c46066

Add pwd. Consolidate toy list information under toylist.h.
author Rob Landley <rob@landley.net>
date Sat, 04 Nov 2006 17:45:18 -0500
parents 3981c96f9285
children eb46bb5626cb
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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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9 // Populate toy_list[].
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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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18 // global context for this applet.
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19
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20 struct toy_context toys;
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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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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 }