/* vi: set sw=4 ts=4: *//* * Utility routines. * * Copyright (C) tons of folks.  Tracking down who wrote what * isn't something I'm going to worry about...  If you wrote something * here, please feel free to acknowledge your work. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * Based in part on code from sash, Copyright (c) 1999 by David I. Bell  * Permission has been granted to redistribute this code under the GPL. * */#include <stdio.h>#include <stdlib.h>#include <string.h>#include "busybox.h"#undef APPLET#undef APPLET_NOUSAGE#undef PROTOTYPES#include "applets.h"struct BB_applet *applet_using;/* The -1 arises because of the {0,NULL,0,-1} entry above. */const size_t NUM_APPLETS = (sizeof (applets) / sizeof (struct BB_applet) - 1);extern void show_usage(void){	const char *format_string;	const char *usage_string = usage_messages;	int i;	for (i = applet_using - applets; i > 0; ) {		if (!*usage_string++) {			--i;		}	}	format_string = "%s\n\nUsage: %s %s\n\n";	if(*usage_string == 0)		format_string = "%s\n\nNo help available.\n\n";	fprintf(stderr, format_string,			full_version, applet_using->name, usage_string);	exit(EXIT_FAILURE);}static int applet_name_compare(const void *x, const void *y){	const char *name = x;	const struct BB_applet *applet = y;	return strcmp(name, applet->name);}extern const size_t NUM_APPLETS;struct BB_applet *find_applet_by_name(const char *name){	return bsearch(name, applets, NUM_APPLETS, sizeof(struct BB_applet),			applet_name_compare);}void run_applet_by_name(const char *name, int argc, char **argv){	static int recurse_level = 0;	extern int been_there_done_that; /* From busybox.c */	recurse_level++;	/* Do a binary search to find the applet entry given the name. */	if ((applet_using = find_applet_by_name(name)) != NULL) {		applet_name = applet_using->name;		if (argv[1] && strcmp(argv[1], "--help") == 0) {			if (strcmp(applet_using->name, "busybox")==0) {				if(argv[2])				  applet_using = find_applet_by_name(argv[2]);				 else				  applet_using = NULL;			}			if(applet_using)				show_usage();			been_there_done_that=1;			busybox_main(0, NULL);		}		exit((*(applet_using->main)) (argc, argv));	}	/* Just in case they have renamed busybox - Check argv[1] */	if (recurse_level == 1) {		run_applet_by_name("busybox", argc, argv);	}	recurse_level--;}/* END CODE *//*Local Variables:c-file-style: "linux"c-basic-offset: 4tab-width: 4End:*/