Mercurial > hg > toybox
annotate main.c @ 121:933766b0bd4b
Allow applets with optarg string NULL to use toy.optargs[].
author | Rob Landley <rob@landley.net> |
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date | Fri, 01 Jun 2007 13:41:24 -0400 |
parents | cc0a6789f92a |
children | ee49aa0dc731 |
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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 |
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Add pwd. Consolidate toy list information under toylist.h.
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9 // Populate toy_list[]. |
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10 |
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11 #undef NEWTOY |
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12 #undef OLDTOY |
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13 #define NEWTOY(name, opts, flags) {#name, name##_main, opts, flags}, |
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14 #define OLDTOY(name, oldname, opts, flags) {#name, oldname##_main, opts, flags}, |
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15 |
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16 struct toy_list toy_list[] = { |
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17 #include "toys/toylist.h" |
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18 }; |
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19 |
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20 #define TOY_LIST_LEN (sizeof(toy_list)/sizeof(struct toy_list)) |
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21 |
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22 // global context for this applet. |
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23 |
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24 struct toy_context toys; |
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25 union toy_union toy; |
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26 char toybuf[4096]; |
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27 |
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28 struct toy_list *toy_find(char *name) |
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29 { |
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30 int top, bottom, middle; |
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31 |
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32 // If the name starts with "toybox", accept that as a match. Otherwise |
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33 // skip the first entry, which is out of order. |
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34 |
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35 if (!strncmp(name,"toybox",6)) return toy_list; |
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36 bottom = 1; |
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37 |
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38 // Binary search to find this applet. |
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39 |
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40 top = TOY_LIST_LEN-1; |
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41 for (;;) { |
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42 int result; |
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43 |
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44 middle = (top+bottom)/2; |
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45 if (middle<bottom || middle>top) return NULL; |
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46 result = strcmp(name,toy_list[middle].name); |
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47 if (!result) return toy_list+middle; |
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48 if (result<0) top=--middle; |
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49 else bottom = ++middle; |
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50 } |
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51 } |
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52 |
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53 void toy_init(struct toy_list *which, char *argv[]) |
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54 { |
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55 // Free old toys contents here? |
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56 |
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57 toys.which = which; |
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58 toys.argv = argv; |
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59 toys.exitval = 1; |
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New option parsing infrastructure (doesn't use getopt). Hook it up to
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60 if (which->options) get_optflags(); |
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61 else toys.optargs = argv+1; |
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62 } |
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63 |
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64 // Run a toy. |
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65 void toy_exec(char *argv[]) |
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66 { |
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67 struct toy_list *which; |
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68 |
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69 which = toy_find(argv[0]); |
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70 if (!which) return; |
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71 |
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72 toy_init(which, argv); |
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73 |
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74 exit(toys.which->toy_main()); |
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75 } |
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76 |
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77 int toybox_main(void) |
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78 { |
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79 static char *toy_paths[]={"usr/","bin/","sbin/",0}; |
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80 int i, len = 0; |
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81 |
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82 if (toys.argv[1]) { |
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83 if (toys.argv[1][0]!='-') { |
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84 toy_exec(toys.argv+1); |
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85 error_exit("No behavior for %s\n",toys.argv[1]); |
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86 } |
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87 } |
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88 |
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89 // Output list of applets. |
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90 for (i=1; i<TOY_LIST_LEN; i++) { |
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91 int fl = toy_list[i].flags; |
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92 if (fl & TOYMASK_LOCATION) { |
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93 if (toys.argv[1]) { |
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94 int j; |
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95 for (j=0; toy_paths[j]; j++) |
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96 if (fl & (1<<j)) len += printf("%s", toy_paths[j]); |
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97 } |
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98 len += printf("%s ",toy_list[i].name); |
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99 if (len>65) { |
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100 putchar('\n'); |
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101 len=0; |
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102 } |
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103 } |
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104 } |
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105 putchar('\n'); |
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106 return 0; |
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107 } |
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108 |
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109 int main(int argc, char *argv[]) |
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110 { |
65 | 111 // Artificial scope to eat less stack for things we call |
112 { | |
113 char *name; | |
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114 |
65 | 115 // Figure out which applet to call. |
116 name = rindex(argv[0], '/'); | |
117 if (!name) name=argv[0]; | |
118 else name++; | |
119 argv[0] = name; | |
120 } | |
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121 |
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122 toys.argv = argv-1; |
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123 return toybox_main(); |
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124 } |