/* vi: set sw=4 ts=4: */#include <stdio.h>#include <string.h>#include <unistd.h>#include <errno.h>#include <stdlib.h>#include "busybox.h"#ifdef BB_LOCALE_SUPPORT#include <locale.h>#endifint been_there_done_that = 0; /* Also used in applets.c */const char *applet_name;#ifdef BB_FEATURE_INSTALLER/*  * directory table *		this should be consistent w/ the enum, busybox.h::Location, *		or else... */static const char usr_bin [] ="/usr/bin";static const char usr_sbin[] ="/usr/sbin";static const char* const install_dir[] = {	&usr_bin [8], /* "", equivalent to "/" for concat_path_file() */	&usr_bin [4], /* "/bin" */	&usr_sbin[4], /* "/sbin" */	usr_bin,	usr_sbin};     /* abstract link() */typedef int (*__link_f)(const char *, const char *);/* create (sym)links for each applet */static void install_links(const char *busybox, int use_symbolic_links){	__link_f Link = link;	char *fpc;	int i;	int rc;	if (use_symbolic_links) 		Link = symlink;	for (i = 0; applets[i].name != NULL; i++) {		fpc = concat_path_file(			install_dir[applets[i].location], applets[i].name);		rc = Link(busybox, fpc);		if (rc!=0 && errno!=EEXIST) {			perror_msg("%s", fpc);		}		free(fpc);	}}#endif /* BB_FEATURE_INSTALLER */int main(int argc, char **argv){	const char *s;	applet_name = argv[0];	if (applet_name[0] == '-')		applet_name++;	for (s = applet_name; *s != '\0';) {		if (*s++ == '/')			applet_name = s;	}#ifdef BB_LOCALE_SUPPORT #ifdef BB_INIT	if(getpid()!=1)	/* Do not set locale for `init' */#endif	{		setlocale(LC_ALL, "");	}#endif	run_applet_by_name(applet_name, argc, argv);	error_msg_and_die("applet not found");}int busybox_main(int argc, char **argv){	int col = 0, len, i;#ifdef BB_FEATURE_INSTALLER		/* 	 * This style of argument parsing doesn't scale well 	 * in the event that busybox starts wanting more --options.	 * If someone has a cleaner approach, by all means implement it.	 */	if (argc > 1 && (strcmp(argv[1], "--install") == 0)) {		int use_symbolic_links = 0;		int rc = 0;		char *busybox;		/* to use symlinks, or not to use symlinks... */		if (argc > 2) {			if ((strcmp(argv[2], "-s") == 0)) { 				use_symbolic_links = 1; 			}		}		/* link */		busybox = xreadlink("/proc/self/exe");		if (busybox) {			install_links(busybox, use_symbolic_links);			free(busybox);		} else {			rc = 1;		}		return rc;	}#endif /* BB_FEATURE_INSTALLER */	argc--;	/* If we've already been here once, exit now */	if (been_there_done_that == 1 || argc < 1) {		const struct BB_applet *a = applets;		fprintf(stderr, "%s\n\n"				"Usage: busybox [function] [arguments]...\n"				"   or: [function] [arguments]...\n\n"				"\tBusyBox is a multi-call binary that combines many common Unix\n"				"\tutilities into a single executable.  Most people will create a\n"				"\tlink to busybox for each function they wish to use, and BusyBox\n"				"\twill act like whatever it was invoked as.\n" 				"\nCurrently defined functions:\n", full_version);		while (a->name != 0) {			col +=				fprintf(stderr, "%s%s", ((col == 0) ? "\t" : ", "),						(a++)->name);			if (col > 60 && a->name != 0) {				fprintf(stderr, ",\n");				col = 0;			}		}		fprintf(stderr, "\n\n");		exit(0);	}	/* Flag that we've been here already */	been_there_done_that = 1;		/* Move the command line down a notch */	len = argv[argc] + strlen(argv[argc]) - argv[1];	memmove(argv[0], argv[1], len);	memset(argv[0] + len, 0, argv[1] - argv[0]);	/* Fix up the argv pointers */	len = argv[1] - argv[0];	memmove(argv, argv + 1, sizeof(char *) * (argc + 1));	for (i = 0; i < argc; i++)		argv[i] -= len;	return (main(argc, argv));}/*Local Variables:c-file-style: "linux"c-basic-offset: 4tab-width: 4End:*/