view toys/help.c @ 233:d4176f3f3835

Zap toys/Config.in and instead create generated/Config.in from contents of toys/*.c. Move relevant info into comment at the top of each toys/*.c. Also convert more of Makefile into a thin wrapper around shell scripts that actually do the work. (Makefile is only still there for the user interface.)
author Rob Landley <rob@landley.net>
date Sat, 19 Jan 2008 17:08:39 -0600
parents cd4d5630c978
children 163498bf547b
line wrap: on
line source

/* vi: set sw=4 ts=4:
 *
 * help.c - Show help for toybox
 *
 * Copyright 2007 Rob Landley <rob@landley.net>
 *
 * Not in SUSv3, but exists as a bash builtin.

config HELP
	bool "help"
	default y
	help
	  usage: help [command]

	  Show usage information for toybox commands.

config HELP_LONG
	bool "Verbose help text"
	default y
	depends on HELP
	help
	  Show more than one line of help information per command.
*/
 

#include "toys.h"
#include "generated/help.h"

#undef NEWTOY
#undef OLDTOY
#define NEWTOY(name,opt,flags) help_##name "\0"
#define OLDTOY(name,oldname,opts,flags) "\xff" #oldname "\0"
static char *help_data =
#include "toys/toylist.h"
;

void help_main(void)
{
	struct toy_list *t = toy_find(*toys.optargs);
	int i = t-toy_list;
	char *s = help_data;

	if (!t) error_exit("Unknown command '%s'", *toys.optargs);
	for (;;) {
		while (i--) s += strlen(s) + 1;
		if (*s != 255) break;
		i = toy_find(++s)-toy_list;
		s = help_data;
	}

	fprintf(toys.exithelp ? stderr : stdout, "%s", s);
}