view toys/hello.c @ 543:60b97ba66a70

Extensive semi-gratuitous refactoring: factor out common code, handle euid!=uid and egid!=gid cases. (Note: test suite requires root access, possibly container support.)
author Rob Landley <>
date Mon, 12 Mar 2012 23:00:28 -0500
parents f6ffc6685a9e
children a3e014fdeb35
line wrap: on
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/* vi: set sw=4 ts=4:
 * hello.c - A hello world program.
 * Copyright 2012 Rob Landley <>
 * Not in SUSv4.
 * See


config HELLO
	bool "hello"
	default n
	  usage: hello [-a] [-b string] [-c number] [-d list] [-e count] [...]

	  A hello world program.  You don't need this.

	  Mostly used as an example/skeleton file for adding new commands,
	  occasionally nice to test kernel booting via "init=/bin/hello".

#include "toys.h"

// Hello doesn't use these globals, they're here for example/skeleton purposes.

	char *b_string;
	long c_number;
	struct arg_list *d_list;
	long e_count;

	int more_globals;

#define TT this.hello

#define FLAG_a	1
#define FLAG_b	2
#define FLAG_c	4
#define FLAG_d	8
#define FLAG_e	16

void hello_main(void)
	printf("Hello world\n");

	if (toys.optflags & FLAG_a) printf("Saw a\n");
	if (toys.optflags & FLAG_b) printf("b=%s\n", TT.b_string);
	if (toys.optflags & FLAG_c) printf("c=%ld\n", TT.c_number);
	while (TT.d_list) {
		printf("d=%s\n", TT.d_list->arg);
		TT.d_list = TT.d_list->next;
	if (TT.e_count) printf("e was seen %ld times", TT.e_count);

	while (*toys.optargs) printf("optarg=%s\n", *(toys.optargs++));