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annotate main.c @ 53:41d55b5d49fd

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Add start of mke2fs/gene2fs, and some other stuff I've been working on.
author Rob Landley <rob@landley.net>
date Sun, 14 Jan 2007 20:20:06 -0500
parents eb46bb5626cb
children 329e2b37d0e1
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e651a31d5416 Starting a new project. Just a bit past the "hello world" stage...
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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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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 char toybuf[4096];
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23 struct toy_list *toy_find(char *name)
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24 {
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25 int top, bottom, middle;
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26
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27 // If the name starts with "toybox", accept that as a match. Otherwise
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28 // skip the first entry, which is out of order.
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29
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30 if (!strncmp(name,"toybox",6)) return toy_list;
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31 bottom = 1;
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32
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33 // Binary search to find this applet.
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34
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35 top = TOY_LIST_LEN-1;
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36 for (;;) {
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37 int result;
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38
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39 middle = (top+bottom)/2;
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40 if (middle<bottom || middle>top) return NULL;
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41 result = strcmp(name,toy_list[middle].name);
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42 if (!result) return toy_list+middle;
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43 if (result<0) top=--middle;
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44 else bottom = ++middle;
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45 }
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46 }
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47
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48 void toy_init(struct toy_list *which, char *argv[])
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49 {
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50 // Free old toys contents here?
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51
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52 toys.which = which;
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53 toys.argv = argv;
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54 toys.exitval = 1;
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55 if (which->options) get_optflags();
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56 }
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57
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58 // Run a toy.
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59 void toy_exec(char *argv[])
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60 {
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61 struct toy_list *which;
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62
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63 which = toy_find(argv[0]);
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64 if (!which) return;
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65
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66 toy_init(which, argv);
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67
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68 exit(toys.which->toy_main());
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69 }
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70
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71 int toybox_main(void)
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72 {
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73 static char *toy_paths[]={"usr/","bin/","sbin/",0};
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74 int i, len = 0;
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75
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76 if (toys.argv[1]) {
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77 if (toys.argv[1][0]!='-') {
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78 toy_exec(toys.argv+1);
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79 error_exit("No behavior for %s\n",toys.argv[1]);
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80 }
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81 }
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82
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83 // Output list of applets.
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84 for (i=1; i<TOY_LIST_LEN; i++) {
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85 int fl = toy_list[i].flags;
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86 if (fl & TOYMASK_LOCATION) {
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87 if (toys.argv[1]) {
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88 int j;
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89 for (j=0; toy_paths[j]; j++)
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90 if (fl & (1<<j)) len += printf("%s", toy_paths[j]);
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91 }
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92 len += printf("%s ",toy_list[i].name);
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93 if (len>65) {
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94 putchar('\n');
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95 len=0;
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96 }
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97 }
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98 }
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99 putchar('\n');
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100 return 0;
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101 }
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102
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103 int main(int argc, char *argv[])
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104 {
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105 char *name;
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106
2
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107 // Figure out which applet to call.
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108 name = rindex(argv[0], '/');
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109 if (!name) name=argv[0];
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110 else name++;
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111 argv[0] = name;
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112
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113 toys.argv = argv-1;
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114 return toybox_main();
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115 }