annotate toys/hello.c @ 403:f6ffc6685a9e

Fluff out documentation and skeleton code.
author Rob Landley <rob@landley.net>
date Mon, 16 Jan 2012 01:44:17 -0600
parents 5d4dacab7be0
children a3e014fdeb35
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d4176f3f3835 Zap toys/Config.in and instead create generated/Config.in from contents of
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1 /* vi: set sw=4 ts=4:
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2 *
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3 * hello.c - A hello world program.
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30a6db5a95c2 Add comments about SUSv3 specs (or lack thereof).
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4 *
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5 * Copyright 2012 Rob Landley <rob@landley.net>
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6 *
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7 * Not in SUSv4.
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8 * See http://opengroup.org/onlinepubs/9699919799/utilities/
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9
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10 USE_HELLO(NEWTOY(hello, "e@d*c#b:a", TOYFLAG_USR|TOYFLAG_BIN))
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11
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12 config HELLO
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13 bool "hello"
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157eab6dcdd2 Hello shouldn't be enabled in defconfig.
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14 default n
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15 help
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16 usage: hello [-a] [-b string] [-c number] [-d list] [-e count] [...]
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17
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18 A hello world program. You don't need this.
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20 Mostly used as an example/skeleton file for adding new commands,
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21 occasionally nice to test kernel booting via "init=/bin/hello".
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22 */
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24 #include "toys.h"
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25
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26 // Hello doesn't use these globals, they're here for example/skeleton purposes.
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27
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28 DEFINE_GLOBALS(
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29 char *b_string;
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30 long c_number;
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31 struct arg_list *d_list;
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32 long e_count;
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33
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34 int more_globals;
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35 )
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36
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37 #define TT this.hello
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38
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39 #define FLAG_a 1
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40 #define FLAG_b 2
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41 #define FLAG_c 4
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42 #define FLAG_d 8
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43 #define FLAG_e 16
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44
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45 void hello_main(void)
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46 {
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47 printf("Hello world\n");
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48
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49 if (toys.optflags & FLAG_a) printf("Saw a\n");
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50 if (toys.optflags & FLAG_b) printf("b=%s\n", TT.b_string);
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51 if (toys.optflags & FLAG_c) printf("c=%ld\n", TT.c_number);
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52 while (TT.d_list) {
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53 printf("d=%s\n", TT.d_list->arg);
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54 TT.d_list = TT.d_list->next;
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55 }
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56 if (TT.e_count) printf("e was seen %ld times", TT.e_count);
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57
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58 while (*toys.optargs) printf("optarg=%s\n", *(toys.optargs++));
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59 }