busybox.c

/* vi: set sw=4 ts=4: */
#include "internal.h"
#include <stdio.h>
#include <string.h>
#include <errno.h>

static int been_there_done_that = 0;

/* It has been alledged that doing such things can
 * help reduce binary size when staticly linking,
 * of course with glibc, this is unlikely as long
 * as we use things like printf -- perhaps a printf
 * replacement may be in order 
 */
#if 0
void exit(int status) __attribute__ ((noreturn));
void exit(int status)
{
	_exit(status);
};
void abort(void) __attribute__ ((__noreturn__));
void abort(void)
{
	_exit(0);
};
int atexit(void (*__func) (void))
{
	_exit(0);
};
void *__libc_stack_end;
#endif

static const struct Applet applets[] = {

#ifdef BB_BASENAME
	{"basename", basename_main, _BB_DIR_USR_BIN},
#endif
#ifdef BB_BUSYBOX
	{"busybox", busybox_main, _BB_DIR_BIN},
#endif
#ifdef BB_BLOCK_DEVICE
	{"block_device", block_device_main, _BB_DIR_SBIN},
#endif
#ifdef BB_CAT
	{"cat", cat_main, _BB_DIR_BIN},
#endif
#ifdef BB_CHMOD_CHOWN_CHGRP
	{"chmod", chmod_chown_chgrp_main, _BB_DIR_BIN},
#endif
#ifdef BB_CHMOD_CHOWN_CHGRP
	{"chown", chmod_chown_chgrp_main, _BB_DIR_BIN},
#endif
#ifdef BB_CHMOD_CHOWN_CHGRP
	{"chgrp", chmod_chown_chgrp_main, _BB_DIR_BIN},
#endif
#ifdef BB_CHROOT
	{"chroot", chroot_main, _BB_DIR_SBIN},
#endif
#ifdef BB_CLEAR
	{"clear", clear_main, _BB_DIR_USR_BIN},
#endif
#ifdef BB_CHVT
	{"chvt", chvt_main, _BB_DIR_USR_BIN},
#endif
#ifdef BB_CP_MV
	{"cp", cp_mv_main, _BB_DIR_BIN},
#endif
#ifdef BB_CP_MV
	{"mv", cp_mv_main, _BB_DIR_BIN},
#endif
#ifdef BB_DATE
	{"date", date_main, _BB_DIR_BIN},
#endif
#ifdef BB_DD
	{"dd", dd_main, _BB_DIR_BIN},
#endif
#ifdef BB_DF
	{"df", df_main, _BB_DIR_BIN},
#endif
#ifdef BB_DIRNAME
	{"dirname", dirname_main, _BB_DIR_USR_BIN},
#endif
#ifdef BB_DMESG
	{"dmesg", dmesg_main, _BB_DIR_BIN},
#endif
#ifdef BB_DU
	{"du", du_main, _BB_DIR_BIN},
#endif
#ifdef BB_DUTMP
	{"dutmp", dutmp_main, _BB_DIR_USR_SBIN},
#endif
#ifdef BB_ECHO
	{"echo", echo_main, _BB_DIR_BIN},
#endif
#ifdef BB_FBSET
	{"fbset", fbset_main, _BB_DIR_USR_SBIN},
#endif
#ifdef BB_FDFLUSH
	{"fdflush", fdflush_main, _BB_DIR_BIN},
#endif
#ifdef BB_FIND
	{"find", find_main, _BB_DIR_USR_BIN},
#endif
#ifdef BB_FREE
	{"free", free_main, _BB_DIR_USR_BIN},
#endif
#ifdef BB_FREERAMDISK
	{"freeramdisk", freeramdisk_main, _BB_DIR_SBIN},
#endif
#ifdef BB_DEALLOCVT
	{"deallocvt", deallocvt_main, _BB_DIR_USR_BIN},
#endif
#ifdef BB_FSCK_MINIX
	{"fsck.minix", fsck_minix_main, _BB_DIR_SBIN},
#endif
#ifdef BB_MKFS_MINIX
	{"mkfs.minix", mkfs_minix_main, _BB_DIR_SBIN},
#endif
#ifdef BB_GREP
	{"grep", grep_main, _BB_DIR_BIN},
#endif
#ifdef BB_HALT
	{"halt", halt_main, _BB_DIR_SBIN},
#endif
#ifdef BB_HEAD
	{"head", head_main, _BB_DIR_BIN},
#endif
#ifdef BB_HOSTID
	{"hostid", hostid_main, _BB_DIR_USR_BIN},
#endif
#ifdef BB_HOSTNAME
	{"hostname", hostname_main, _BB_DIR_BIN},
#endif
#ifdef BB_INIT
	{"init", init_main, _BB_DIR_SBIN},
#endif
#ifdef BB_INSMOD
	{"insmod", insmod_main, _BB_DIR_SBIN},
#endif
#ifdef BB_FEATURE_LINUXRC		//
	{"linuxrc", init_main, _BB_DIR_ROOT},
#endif
#ifdef BB_KILL
	{"kill", kill_main, _BB_DIR_BIN},
#endif
#ifdef BB_KILLALL
	{"killall", kill_main, _BB_DIR_USR_BIN},
#endif
#ifdef BB_LENGTH
	{"length", length_main, _BB_DIR_USR_BIN},
#endif
#ifdef BB_LN
	{"ln", ln_main, _BB_DIR_BIN},
#endif
#ifdef BB_LOADACM
	{"loadacm", loadacm_main, _BB_DIR_USR_BIN},
#endif
#ifdef BB_LOADFONT
	{"loadfont", loadfont_main, _BB_DIR_USR_BIN},
#endif
#ifdef BB_LOADKMAP
	{"loadkmap", loadkmap_main, _BB_DIR_SBIN},
#endif
#ifdef BB_LS
	{"ls", ls_main, _BB_DIR_BIN},
#endif
#ifdef BB_LSMOD
	{"lsmod", lsmod_main, _BB_DIR_SBIN},
#endif
#ifdef BB_MAKEDEVS
	{"makedevs", makedevs_main, _BB_DIR_SBIN},
#endif
#ifdef BB_MATH
	{"math", math_main, _BB_DIR_USR_BIN},
#endif
#ifdef BB_MKDIR
	{"mkdir", mkdir_main, _BB_DIR_BIN},
#endif
#ifdef BB_MKFIFO
	{"mkfifo", mkfifo_main, _BB_DIR_USR_BIN},
#endif
#ifdef BB_MKNOD
	{"mknod", mknod_main, _BB_DIR_BIN},
#endif
#ifdef BB_MKSWAP
	{"mkswap", mkswap_main, _BB_DIR_SBIN},
#endif
#ifdef BB_MNC
	{"mnc", mnc_main, _BB_DIR_USR_BIN},
#endif
#ifdef BB_MORE
	{"more", more_main, _BB_DIR_BIN},
#endif
#ifdef BB_MOUNT
	{"mount", mount_main, _BB_DIR_BIN},
#endif
#ifdef BB_MT
	{"mt", mt_main, _BB_DIR_BIN},
#endif
#ifdef BB_NSLOOKUP
	{"nslookup", nslookup_main, _BB_DIR_USR_BIN},
#endif
#ifdef BB_PING
	{"ping", ping_main, _BB_DIR_BIN},
#endif
#ifdef BB_POWEROFF
	{"poweroff", poweroff_main, _BB_DIR_SBIN},
#endif
#ifdef BB_PRINTF
	{"printf", printf_main, _BB_DIR_USR_BIN},
#endif
#ifdef BB_PS
	{"ps", ps_main, _BB_DIR_BIN},
#endif
#ifdef BB_PWD
	{"pwd", pwd_main, _BB_DIR_BIN},
#endif
#ifdef BB_REBOOT
	{"reboot", reboot_main, _BB_DIR_SBIN},
#endif
#ifdef BB_RM
	{"rm", rm_main, _BB_DIR_BIN},
#endif
#ifdef BB_RMDIR
	{"rmdir", rmdir_main, _BB_DIR_BIN},
#endif
#ifdef BB_RMMOD
	{"rmmod", rmmod_main, _BB_DIR_SBIN},
#endif
#ifdef BB_SED
	{"sed", sed_main, _BB_DIR_BIN},
#endif
#ifdef BB_SH
	{"sh", shell_main, _BB_DIR_BIN},
#endif
#ifdef BB_SFDISK
	{"sfdisk", sfdisk_main, _BB_DIR_SBIN},
#endif
#ifdef BB_SLEEP
	{"sleep", sleep_main, _BB_DIR_BIN},
#endif
#ifdef BB_SORT
	{"sort", sort_main, _BB_DIR_BIN},
#endif
#ifdef BB_SYNC
	{"sync", sync_main, _BB_DIR_BIN},
#endif
#ifdef BB_SYSLOGD
	{"syslogd", syslogd_main, _BB_DIR_SBIN},
#endif
#ifdef BB_LOGGER
	{"logger", logger_main, _BB_DIR_USR_BIN},
#endif
#ifdef BB_LOGNAME
	{"logname", logname_main, _BB_DIR_USR_BIN},
#endif
#ifdef BB_SWAPONOFF
	{"swapon", swap_on_off_main, _BB_DIR_SBIN},
#endif
#ifdef BB_SWAPONOFF
	{"swapoff", swap_on_off_main, _BB_DIR_SBIN},
#endif
#ifdef BB_TAIL
	{"tail", tail_main, _BB_DIR_USR_BIN},
#endif
#ifdef BB_TAR
	{"tar", tar_main, _BB_DIR_BIN},
#endif
#ifdef BB_TELNET
	{"telnet", telnet_main, _BB_DIR_USR_BIN},
#endif
#ifdef BB_TEST
	{"[", test_main, _BB_DIR_USR_BIN},
#endif
#ifdef BB_TEST
	{"test", test_main, _BB_DIR_USR_BIN},
#endif
#ifdef BB_TEE
	{"tee", tee_main, _BB_DIR_BIN},
#endif
#ifdef BB_TOUCH
	{"touch", touch_main, _BB_DIR_USR_BIN},
#endif
#ifdef BB_TR
	{"tr", tr_main, _BB_DIR_USR_BIN},
#endif
#ifdef BB_TRUE_FALSE
	{"true", true_main, _BB_DIR_BIN},
#endif
#ifdef BB_TRUE_FALSE
	{"false", false_main, _BB_DIR_BIN},
#endif
#ifdef BB_TTY
	{"tty", tty_main, _BB_DIR_USR_BIN},
#endif
#ifdef BB_UMOUNT
	{"umount", umount_main, _BB_DIR_BIN},
#endif
#ifdef BB_UNAME
	{"uname", uname_main, _BB_DIR_BIN},
#endif
#ifdef BB_UPTIME
	{"uptime", uptime_main, _BB_DIR_USR_BIN},
#endif
#ifdef BB_UNIQ
	{"uniq", uniq_main, _BB_DIR_BIN},
#endif
#ifdef BB_UPDATE
	{"update", update_main, _BB_DIR_SBIN},
#endif
#ifdef BB_USLEEP
	{"usleep", usleep_main, _BB_DIR_BIN},
#endif
#ifdef BB_WC
	{"wc", wc_main, _BB_DIR_USR_BIN},
#endif
#ifdef BB_WHOAMI
	{"whoami", whoami_main, _BB_DIR_USR_BIN},
#endif
#ifdef BB_YES
	{"yes", yes_main, _BB_DIR_USR_BIN},
#endif
#ifdef BB_GUNZIP
	{"zcat", gunzip_main, _BB_DIR_BIN},
#endif
#ifdef BB_GUNZIP
	{"gunzip", gunzip_main, _BB_DIR_BIN},
#endif
#ifdef BB_GZIP
	{"gzip", gzip_main, _BB_DIR_BIN},
#endif
	{0}
};



int main(int argc, char **argv)
{
	char				*s;
	char				*name;
	const struct Applet	*a		= applets;

	for (s = name = argv[0]; *s != '\0';) {
		if (*s++ == '/')
			name = s;
	}

	*argv = name;

	while (a->name != 0) {
		if (strcmp(name, a->name) == 0) {
			int status;

			status = ((*(a->main)) (argc, argv));
			if (status < 0) {
				fprintf(stderr, "%s: %s\n", a->name, strerror(errno));
			}
			fprintf(stderr, "\n");
			exit(status);
		}
		a++;
	}
	exit(busybox_main(argc, argv));
}


int busybox_main(int argc, char **argv)
{
	int col = 0;

	argc--;
	argv++;

	if (been_there_done_that == 1 || argc < 1) {
		const struct Applet *a = applets;

		fprintf(stderr, "BusyBox v%s (%s) multi-call binary -- GPL2\n\n",
				BB_VER, BB_BT);
		fprintf(stderr, "Usage: busybox [function] [arguments]...\n");
		fprintf(stderr, "   or: [function] [arguments]...\n\n");
		fprintf(stderr,
				"\tBusyBox is a multi-call binary that combines many common Unix utilities into a\n"
				"\tsingle executable.  Most people will create a link to busybox for each function\n"
				"\tthey wish to use, and BusyBox will act like whatever it was invoked as.\n");
		fprintf(stderr, "\nCurrently defined functions:\n");

		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(-1);
	} else {
		/* If we've already been here once, exit now */
		been_there_done_that = 1;
		return (main(argc, argv));
	}
}

/*
Local Variables:
c-file-style: "linux"
c-basic-offset: 4
tab-width: 4
End:
*/