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021fa7db9

Glenn L McGrath

2002-11-09

FAILED Duration: 6s

Subject

debian compatable ifup and ifdown commands

Binary

No binary (build failed)

Architecture & Compiler Flags

Architecture: x86_64-linux-gnu Compiler: gcc (Ubuntu 11.4.0-1ubuntu1~22.04.3) 11.4.0

—

Build Log

(log yok)

Commit Diff GitHub →

include/applets.h +6 -0 include/usage.h +28 -0 networking/Makefile.in +1 -0 networking/config.in +6 -0 networking/ifupdown.c +1437 -0

include/applets.h+6 -0

@@ -239,6 +239,12 @@
	#ifdef CONFIG_IFCONFIG
	APPLET(ifconfig, ifconfig_main, _BB_DIR_SBIN, _BB_SUID_NEVER)
	#endif
+	#ifdef CONFIG_IFUPDOWN
+	APPLET(ifdown, ifupdown_main, _BB_DIR_SBIN, _BB_SUID_NEVER)
+	#endif
+	#ifdef CONFIG_IFUPDOWN
+	APPLET(ifup, ifupdown_main, _BB_DIR_SBIN, _BB_SUID_NEVER)
+	#endif
	#ifdef CONFIG_INIT
	APPLET(init, init_main, _BB_DIR_SBIN, _BB_SUID_NEVER)
	#endif

include/usage.h+28 -0

@@ -807,6 +807,34 @@
	USAGE_IFCONFIG_MII("\t[mem_start <NN>] [io_addr <NN>] [irq <NN>]\n") \
	"\t[up\|down] ..."

+	#define ifup_trivial_usage \
+	"<-ahinv> <ifaces...>"
+	#define ifup_full_usage \
+	"Usage: ifup <options> <ifaces...>\n\n" \
+	"Options:\n" \
+	"\t-h, --help\t\tthis help\n" \
+	"\t-a, --all\t\tde/configure all interfaces automatically\n" \
+	"\t-i, --interfaces FILE\tuse FILE for interface definitions\n" \
+	"\t-n, --no-act\t\tprint out what would happen, but don't do it\n" \
+	"\t\t\t\t(note that this option doesn't disable mappings)\n" \
+	"\t-v, --verbose\t\tprint out what would happen before doing it\n" \
+	"\t--no-mappings\t\tdon't run any mappings\n" \
+	"\t--force\t\t\tforce de/configuration\n"
+
+	#define ifdown_trivial_usage \
+	"<-ahinv> <ifaces...>"
+	#define ifdown_full_usage \
+	"Usage: ifdown <options> <ifaces...>\n\n" \
+	"Options:\n" \
+	"\t-h, --help\t\tthis help\n" \
+	"\t-a, --all\t\tde/configure all interfaces automatically\n" \
+	"\t-i, --interfaces FILE\tuse FILE for interface definitions\n" \
+	"\t-n, --no-act\t\tprint out what would happen, but don't do it\n" \
+	"\t\t\t\t(note that this option doesn't disable mappings)\n" \
+	"\t-v, --verbose\t\tprint out what would happen before doing it\n" \
+	"\t--no-mappings\t\tdon't run any mappings\n" \
+	"\t--force\t\t\tforce de/configuration\n"
+
	#define init_trivial_usage \
	""
	#define init_full_usage \

networking/Makefile.in+1 -0

@@ -25,6 +25,7 @@ endif
	NETWORKING-y:=
	NETWORKING-$(CONFIG_HOSTNAME) += hostname.o
	NETWORKING-$(CONFIG_IFCONFIG) += ifconfig.o
+	NETWORKING-$(CONFIG_IFUPDOWN) += ifupdown.o
	NETWORKING-$(CONFIG_NC) += nc.o
	NETWORKING-$(CONFIG_NETSTAT) += netstat.o
	NETWORKING-$(CONFIG_NSLOOKUP) += nslookup.o

networking/config.in+6 -0

@@ -16,6 +16,12 @@ if [ "$CONFIG_IFCONFIG" = "y" ]; then
	bool ' Enable option "hw" (ether only)' CONFIG_FEATURE_IFCONFIG_HW
	bool ' Set the broadcast automatically' CONFIG_FEATURE_IFCONFIG_BROADCAST_PLUS
	fi
+	bool 'ifupdown' CONFIG_IFUPDOWN
+	if [ "$CONFIG_IFUPDOWN" = "y" ]; then
+	bool ' Enable support for IPv4' CONFIG_FEATURE_IFUPDOWN_IPV4
+	bool ' Enable support for IPv6 (requires ip command)' CONFIG_FEATURE_IFUPDOWN_IPV6
+	bool ' Enable support for IPX (requires ipx_interface command)' CONFIG_FEATURE_IFUPDOWN_IPX
+	fi
	bool 'nc' CONFIG_NC
	bool 'netstat' CONFIG_NETSTAT
	bool 'nslookup' CONFIG_NSLOOKUP

networking/ifupdown.c+1437 -0

@@ -0,0 +1,1437 @@
+	/*
+	* ifupdown for busybox
+	* Based on ifupdown by Anthony Towns
+	* Copyright (c) 1999 Anthony Towns <[email protected]>
+	*
+	* Remove checks for kernel version, assume kernel version 2.2.0 or better
+	*
+	* 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.
+	*/
+
+	#include <sys/stat.h>
+	#include <sys/utsname.h>
+	#include <sys/wait.h>
+
+	#include <ctype.h>
+	#include <errno.h>
+	#include <fcntl.h>
+	#include <fnmatch.h>
+	#include <getopt.h>
+	#include <stdarg.h>
+	#include <stdio.h>
+	#include <stdlib.h>
+	#include <string.h>
+	#include <unistd.h>
+
+	#include "busybox.h"
+	#include "config.h"
+
+	#define IFUPDOWN_VERSION "0.6.4"
+
+	typedef struct interface_defn interface_defn;
+
+	typedef int (execfn)(char *command);
+	typedef int (command_set)(interface_defn ifd, execfn e);
+
+	typedef struct method {
+	char *name;
+	command_set *up;
+	command_set *down;
+	} method;
+
+	typedef struct address_family {
+	char *name;
+	int n_methods;
+	method *method;
+	} address_family;
+
+	typedef struct mapping_defn {
+	struct mapping_defn *next;
+
+	int max_matches;
+	int n_matches;
+	char **match;
+
+	char *script;
+
+	int max_mappings;
+	int n_mappings;
+	char **mapping;
+	} mapping_defn;
+
+	typedef struct variable {
+	char *name;
+	char *value;
+	} variable;
+
+	struct interface_defn {
+	struct interface_defn *next;
+
+	char *iface;
+	address_family *address_family;
+	method *method;
+
+	int automatic;
+
+	int max_options;
+	int n_options;
+	variable *option;
+	};
+
+	typedef struct interfaces_file {
+	int max_autointerfaces;
+	int n_autointerfaces;
+	char **autointerfaces;
+
+	interface_defn *ifaces;
+	mapping_defn *mappings;
+	} interfaces_file;
+
+	#define MAX_OPT_DEPTH 10
+	#define EUNBALBRACK 10001
+	#define EUNDEFVAR 10002
+	#define MAX_VARNAME 32
+	#define EUNBALPER 10000
+
+	static int no_act = 0;
+	static int verbose = 0;
+	static char **environ = NULL;
+
+	static int execable(char *program)
+	{
+	struct stat buf;
+	if (0 == stat(program, &buf)) {
+	if (S_ISREG(buf.st_mode) && (S_IXUSR & buf.st_mode)) {
+	return(1);
+	}
+	}
+	return(0);
+	}
+
+	static void addstr(char *buf, size_t len, size_t pos, char str, size_t str_length)
+	{
+	if (pos + str_length >= len) {
+	char *newbuf;
+
+	newbuf = xrealloc(buf, len * 2 + str_length + 1);
+	*buf = newbuf;
+	len = len * 2 + str_length + 1;
+	}
+
+	while (str_length-- >= 1) {
+	(buf)[(pos)++] = *str;
+	str++;
+	}
+	(buf)[pos] = '\0';
+	}
+
+	static int strncmpz(char l, char r, size_t llen)
+	{
+	int i = strncmp(l, r, llen);
+
+	if (i == 0) {
+	return(-r[llen]);
+	} else {
+	return(i);
+	}
+	}
+
+	static char get_var(char id, size_t idlen, interface_defn *ifd)
+	{
+	int i;
+
+	if (strncmpz(id, "iface", idlen) == 0) {
+	return (ifd->iface);
+	} else {
+	for (i = 0; i < ifd->n_options; i++) {
+	if (strncmpz(id, ifd->option[i].name, idlen) == 0) {
+	return (ifd->option[i].value);
+	}
+	}
+	}
+
+	return(NULL);
+	}
+
+	static char parse(char command, interface_defn *ifd)
+	{
+
+	char *result = NULL;
+	size_t pos = 0, len = 0;
+	size_t old_pos[MAX_OPT_DEPTH] = { 0 };
+	int okay[MAX_OPT_DEPTH] = { 1 };
+	int opt_depth = 1;
+
+	while (*command) {
+	switch (*command) {
+
+	default:
+	addstr(&result, &len, &pos, command, 1);
+	command++;
+	break;
+	case '\\':
+	if (command[1]) {
+	addstr(&result, &len, &pos, command + 1, 1);
+	command += 2;
+	} else {
+	addstr(&result, &len, &pos, command, 1);
+	command++;
+	}
+	break;
+	case '[':
+	if (command[1] == '[' && opt_depth < MAX_OPT_DEPTH) {
+	old_pos[opt_depth] = pos;
+	okay[opt_depth] = 1;
+	opt_depth++;
+	command += 2;
+	} else {
+	addstr(&result, &len, &pos, "[", 1);
+	command++;
+	}
+	break;
+	case ']':
+	if (command[1] == ']' && opt_depth > 1) {
+	opt_depth--;
+	if (!okay[opt_depth]) {
+	pos = old_pos[opt_depth];
+	result[pos] = '\0';
+	}
+	command += 2;
+	} else {
+	addstr(&result, &len, &pos, "]", 1);
+	command++;
+	}
+	break;
+	case '%':
+	{
+	char *nextpercent;
+	char *varvalue;
+
+	command++;
+	nextpercent = strchr(command, '%');
+	if (!nextpercent) {
+	errno = EUNBALPER;
+	free(result);
+	return (NULL);
+	}
+
+	varvalue = get_var(command, nextpercent - command, ifd);
+
+	if (varvalue) {
+	addstr(&result, &len, &pos, varvalue, xstrlen(varvalue));
+	} else {
+	okay[opt_depth - 1] = 0;
+	}
+
+	command = nextpercent + 1;
+	}
+	break;
+	}
+	}
+
+	if (opt_depth > 1) {
+	errno = EUNBALBRACK;
+	free(result);
+	return(NULL);
+	}
+
+	if (!okay[0]) {
+	errno = EUNDEFVAR;
+	free(result);
+	return(NULL);
+	}
+
+	return(result);
+	}
+
+	static int execute(char command, interface_defn ifd, execfn *exec)
+	{
+	char *out;
+	int ret;
+
+	out = parse(command, ifd);
+	if (!out) {
+	return(0);
+	}
+
+	ret = (*exec) (out);
+
+	free(out);
+	return(ret);
+	}
+
+	#ifdef CONFIG_FEATURE_IFUPDOWN_IPX
+	static int static_up_ipx(interface_defn ifd, execfn exec)
+	{
+	if (!execute("ipx_interface add %iface% %frame% %netnum%", ifd, exec)) {
+	return(0);
+	}
+	return(1);
+	}
+
+	static int static_down_ipx(interface_defn ifd, execfn exec)
+	{
+	if (!execute("ipx_interface del %iface% %frame%", ifd, exec)) {
+	return(0);
+	}
+	return(1);
+	}
+
+	static int dynamic_up(interface_defn ifd, execfn exec)
+	{
+	if (!execute("ipx_interface add %iface% %frame%", ifd, exec)) {
+	return(0);
+	}
+	return(1);
+	}
+
+	static int dynamic_down(interface_defn ifd, execfn exec)
+	{
+	if (!execute("ipx_interface del %iface% %frame%", ifd, exec)) {
+	return(0);
+	}
+	return(1);
+	}
+
+	static method methods_ipx[] = {
+	{ "dynamic", dynamic_up, dynamic_down, },
+	{ "static", static_up_ipx, static_down_ipx, },
+	};
+
+	address_family addr_ipx = {
+	"ipx",
+	sizeof(methods_ipx) / sizeof(struct method),
+	methods_ipx
+	};
+	#endif /* IFUP_FEATURE_IPX */
+
+	#ifdef CONFIG_FEATURE_IFUPDOWN_IPV6
+	static int loopback_up6(interface_defn ifd, execfn exec)
+	{
+	if (!execute("ifconfig %iface% add ::1", ifd, exec)) {
+	return(0);
+	}
+	return(1);
+	}
+
+	static int loopback_down6(interface_defn ifd, execfn exec)
+	{
+	if (!execute("ifconfig %iface% del ::1", ifd, exec))
+	return(0);
+	}
+	return(1);
+	}
+
+	static int static_up6(interface_defn ifd, execfn exec)
+	{
+	if (!execute("ifconfig %iface% [[media %media%]] [[hw %hwaddress%]] [[mtu %mtu%]] up", ifd, exec)) {
+	return(0);
+	}
+	if (!execute("ifconfig %iface% add %address%/%netmask%", ifd, exec)) {
+	return(0);
+	}
+	if (!execute("[[ route -A inet6 add ::/0 gw %gateway% ]]", ifd, exec)) {
+	return(0);
+	}
+	return(1);
+	}
+
+	static int static_down6(interface_defn ifd, execfn exec)
+	{
+	if (!execute("ifconfig %iface% down", ifd, exec)) {
+	return(0);
+	}
+	return(1);
+	}
+
+	static int v4tunnel_up(interface_defn ifd, execfn exec)
+	{
+	if (!execute("ip tunnel add %iface% mode sit remote %endpoint% [[local %local%]] [[ttl %ttl%]]", ifd, exec)) {
+	return(0);
+	}
+	if (!execute("ip link set %iface% up", ifd, exec)) {
+	return(0);
+	}
+	if (!execute("ip addr add %address%/%netmask% dev %iface%", ifd, exec)) {
+	return(0);
+	}
+	if (!execute("[[ ip route add ::/0 via %gateway% ]]", ifd, exec)) {
+	return(0);
+	}
+	return(1);
+	}
+
+	static int v4tunnel_down(interface_defn * ifd, execfn * exec)
+	{
+	if (!execute("ip tunnel del %iface%", ifd, exec)) {
+	return(0);
+	}
+	return(1);
+	}
+
+	static method methods6[] = {
+	{ "v4tunnel", v4tunnel_up, v4tunnel_down, },
+	{ "static", static_up6, static_down6, },
+	{ "loopback", loopback_up6, loopback_down6, },
+	};
+
+	address_family addr_inet6 = {
+	"inet6",
+	sizeof(methods6) / sizeof(struct method),
+	methods6
+	};
+	#endif /* CONFIG_FEATURE_IFUPDOWN_IPV6 */
+
+	#ifdef CONFIG_FEATURE_IFUPDOWN_IPV4
+	static int loopback_up(interface_defn ifd, execfn exec)
+	{
+	if (!execute("ifconfig %iface% 127.0.0.1 up", ifd, exec)) {
+	return(0);
+	}
+	return(1);
+	}
+
+	static int loopback_down(interface_defn ifd, execfn exec)
+	{
+	if (!execute("ifconfig %iface% down", ifd, exec)) {
+	return(0);
+	}
+	return(1);
+	}
+
+	static int static_up(interface_defn ifd, execfn exec)
+	{
+	if (!execute("ifconfig %iface% %address% netmask %netmask% [[broadcast %broadcast%]] [[pointopoint %pointopoint%]] [[media %media%]] [[mtu %mtu%]] [[hw %hwaddress%]] up",
+	ifd, exec)) {
+	return(0);
+	}
+	if (!execute("[[ route add default gw %gateway% %iface% ]]", ifd, exec)) {
+	return(0);
+	}
+	return(1);
+	}
+
+	static int static_down(interface_defn ifd, execfn exec)
+	{
+	if (!execute("[[ route del default gw %gateway% %iface% ]]", ifd, exec)) {
+	return(0);
+	}
+	if (!execute("ifconfig %iface% down", ifd, exec)) {
+	return(0);
+	}
+	return(1);
+	}
+
+	static int dhcp_up(interface_defn ifd, execfn exec)
+	{
+	if (execable("/sbin/dhclient")) {
+	if (!execute("dhclient -pf /var/run/dhclient.%iface%.pid %iface%", ifd, exec)) {
+	return(0);
+	}
+	} else if (execable("/sbin/pump")) {
+	if (!execute("pump -i %iface% [[-h %hostname%]] [[-l %leasehours%]]", ifd, exec)) {
+	return(0);
+	}
+	} else if (execable("/sbin/udhcpc")) {
+	if (!execute("udhcpc -n -p /var/run/udhcpc.%iface%.pid -i %iface% [[-H %hostname%]] [[-c %clientid%]]", ifd, exec)) {
+	return 0;
+	}
+	} else if (execable("/sbin/dhcpcd")) {
+	if (!execute("dhcpcd [[-h %hostname%]] [[-i %vendor%]] [[-I %clientid%]] [[-l %leasetime%]] %iface%", ifd, exec)) {
+	return(0);
+	}
+	}
+	return(1);
+	}
+
+	static int dhcp_down(interface_defn ifd, execfn exec)
+	{
+	if (execable("/sbin/dhclient")) {
+	if (!execute("cat /var/run/dhclient.%iface%.pid \| xargs -i kill -TERM {}", ifd, exec)) {
+	return(0);
+	}
+	} else if (execable("/sbin/pump")) {
+	if (!execute("pump -i %iface% -k", ifd, exec)) {
+	return(0);
+	}
+	} else if (execable("/sbin/udhcpc")) {
+	if (!execute("cat /var/run/udhcpc.%iface%.pid \| xargs -i kill -TERM {}", ifd, exec)) {
+	return(0);
+	}
+	} else if (execable("/sbin/dhcpcd")) {
+	if (!execute("dhcpcd -k %iface%", ifd, exec)) {
+	return(0);
+	}
+	}
+	if (!execute("ifconfig %iface% down", ifd, exec)) {
+	return(0);
+	}
+	return(1);
+	}
+
+	static int bootp_up(interface_defn ifd, execfn exec)
+	{
+	if (!execute("bootpc [[--bootfile %bootfile%]] --dev %iface% [[--server %server%]] [[--hwaddr %hwaddr%]] --returniffail --serverbcast", ifd, exec)) {
+	return 0;
+	}
+	return 1;
+	}
+
+	static int bootp_down(interface_defn ifd, execfn exec)
+	{
+	if (!execute("ifconfig down %iface%", ifd, exec)) {
+	return 0;
+	}
+	return 1;
+	}
+
+	static int ppp_up(interface_defn ifd, execfn exec)
+	{
+	if (!execute("pon [[%provider%]]", ifd, exec)) {
+	return 0;
+	}
+	return 1;
+	}
+
+	static int ppp_down(interface_defn ifd, execfn exec)
+	{
+	if (!execute("poff [[%provider%]]", ifd, exec)) {
+	return 0;
+	}
+	return 1;
+	}
+
+	static int wvdial_up(interface_defn ifd, execfn exec)
+	{
+	if (!execute("/sbin/start-stop-daemon --start -x /usr/bin/wvdial -p /var/run/wvdial.%iface% -b -m -- [[ %provider% ]]", ifd, exec)) {
+	return 0;
+	}
+	return 1;
+	}
+
+	static int wvdial_down(interface_defn ifd, execfn exec)
+	{
+	if (!execute ("/sbin/start-stop-daemon --stop -x /usr/bin/wvdial -p /var/run/wvdial.%iface% -s 2", ifd, exec)) {
+	return 0;
+	}
+	return 1;
+	}
+
+	static method methods[] = {
+	{ "wvdial", wvdial_up, wvdial_down, },
+	{ "ppp", ppp_up, ppp_down, },
+	{ "static", static_up, static_down, },
+	{ "bootp", bootp_up, bootp_down, },
+	{ "dhcp", dhcp_up, dhcp_down, },
+	{ "loopback", loopback_up, loopback_down, },
+	};
+
+	address_family addr_inet = {
+	"inet",
+	sizeof(methods) / sizeof(struct method),
+	methods
+	};
+
+	#endif /* ifdef CONFIG_FEATURE_IFUPDOWN_IPV4 */
+
+	static char next_word(char buf, char *word, int maxlen)
+	{
+	if (!buf)
+	return NULL;
+	if (!*buf)
+	return NULL;
+
+	while (!isspace(buf) && buf) {
+	if (maxlen-- > 1)
+	word++ = buf;
+	buf++;
+	}
+	if (maxlen > 0) {
+	*word = '\0';
+	}
+
+	while (isspace(buf) && buf) {
+	buf++;
+	}
+
+	return buf;
+	}
+
+	static address_family get_address_family(address_family af[], char *name)
+	{
+	int i;
+
+	for (i = 0; af[i]; i++) {
+	if (strcmp(af[i]->name, name) == 0) {
+	return af[i];
+	}
+	}
+	return NULL;
+	}
+
+	static method get_method(address_family af, char *name)
+	{
+	int i;
+
+	for (i = 0; i < af->n_methods; i++) {
+	if (strcmp(af->method[i].name, name) == 0) {
+	return &af->method[i];
+	}
+	}
+	return(NULL);
+	}
+
+	static int duplicate_if(interface_defn ifa, interface_defn ifb)
+	{
+	if (strcmp(ifa->iface, ifb->iface) != 0) {
+	return(0);
+	}
+	if (ifa->address_family != ifb->address_family) {
+	return(0);
+	}
+	return(1);
+	}
+
+	static int get_line(char *result, size_t result_len, FILE * f, int *line)
+	{
+	size_t pos;
+
+	do {
+	pos = 0;
+	do {
+	if (*result_len - pos < 10) {
+	char newstr = xrealloc(result, result_len 2 + 80);
+	*result = newstr;
+	result_len = result_len * 2 + 80;
+	}
+
+	if (!fgets(result + pos, result_len - pos, f)) {
+	if (ferror(f) == 0 && pos == 0)
+	return 0;
+	if (ferror(f) != 0)
+	return 0;
+	}
+	pos += xstrlen(*result + pos);
+	} while (pos == result_len - 1 && (result)[pos - 1] != '\n');
+
+	if (pos != 0 && (*result)[pos - 1] == '\n') {
+	(*result)[--pos] = '\0';
+	}
+
+	(*line)++;
+	{
+	int first = 0;
+
+	while (isspace((result)[first]) && (result)[first]) {
+	first++;
+	}
+
+	memmove(result, result + first, pos - first + 1);
+	pos -= first;
+	}
+	} while ((*result)[0] == '#');
+
+	while ((*result)[pos - 1] == '\\') {
+	(*result)[--pos] = '\0';
+	do {
+	if (*result_len - pos < 10) {
+	char newstr = xrealloc(result, result_len 2 + 80);
+	*result = newstr;
+	result_len = result_len * 2 + 80;
+	}
+
+	if (!fgets(result + pos, result_len - pos, f)) {
+	if (ferror(f) == 0 && pos == 0)
+	return 0;
+	if (ferror(f) != 0)
+	return 0;
+	}
+	pos += xstrlen(*result + pos);
+	} while (pos == result_len - 1 && (result)[pos - 1] != '\n');
+
+	if (pos != 0 && (*result)[pos - 1] == '\n') {
+	(*result)[--pos] = '\0';
+	}
+	(*line)++;
+	}
+
+	while (isspace((result)[pos - 1])) { / remove trailing whitespace */
+	pos--;
+	}
+	(*result)[pos] = '\0';
+
+	return 1;
+	}
+
+	static interfaces_file read_interfaces(char filename)
+	{
+	interface_defn *currif = NULL;
+	interfaces_file *defn;
+	mapping_defn *currmap = NULL;
+	FILE *f;
+	char firstword[80];
+	char *buf = NULL;
+	char *rest;
+	int line;
+	size_t buf_len = 0;
+
+	enum { NONE, IFACE, MAPPING } currently_processing = NONE;
+
+	defn = xmalloc(sizeof(interfaces_file));
+	defn->max_autointerfaces = defn->n_autointerfaces = 0;
+	defn->autointerfaces = NULL;
+	defn->mappings = NULL;
+	defn->ifaces = NULL;
+	f = fopen(filename, "r");
+	if (f == NULL) {
+	return NULL;
+	}
+	line = 0;
+
+	while (get_line(&buf, &buf_len, f, &line)) {
+	rest = next_word(buf, firstword, 80);
+	if (rest == NULL) {
+	continue; /* blank line */
+	}
+
+	if (strcmp(firstword, "mapping") == 0) {
+
+	currmap = xmalloc(sizeof(mapping_defn));
+	currmap->max_matches = 0;
+	currmap->n_matches = 0;
+	currmap->match = NULL;
+
+	while ((rest = next_word(rest, firstword, 80))) {
+	if (currmap->max_matches == currmap->n_matches) {
+	currmap->max_matches = currmap->max_matches * 2 + 1;
+	currmap->match = xrealloc(currmap->match, sizeof(currmap->match) * currmap->max_matches);
+	}
+
+	currmap->match[currmap->n_matches++] = xstrdup(firstword);
+	}
+	currmap->max_mappings = 0;
+	currmap->n_mappings = 0;
+	currmap->mapping = NULL;
+	currmap->script = NULL;
+	{
+	mapping_defn **where = &defn->mappings;
+	while (*where != NULL) {
+	where = &(*where)->next;
+	}
+	*where = currmap;
+	currmap->next = NULL;
+	}
+	currently_processing = MAPPING;
+	} else if (strcmp(firstword, "iface") == 0) {
+	{
+	char iface_name[80];
+	char address_family_name[80];
+	char method_name[80];
+	address_family *addr_fams[] = {
+	#ifdef CONFIG_FEATURE_IFUPDOWN_IPV4
+	&addr_inet,
+	#endif
+	#ifdef CONFIG_FEATURE_IFUPDOWN_IPV6
+	&addr_inet6,
+	#endif
+	#ifdef CONFIG_FEATURE_IFUPDOWN_IPX
+	&addr_ipx,
+	#endif
+	NULL
+	};
+
+	currif = xmalloc(sizeof(interface_defn));
+
+	rest = next_word(rest, iface_name, 80);
+	rest = next_word(rest, address_family_name, 80);
+	rest = next_word(rest, method_name, 80);
+
+	if (rest == NULL) {
+	error_msg("%s:%d: too few parameters for iface line", filename, line);
+	return NULL;
+	}
+
+	if (rest[0] != '\0') {
+	error_msg("%s:%d: too many parameters for iface line", filename, line);
+	return NULL;
+	}
+
+	currif->iface = xstrdup(iface_name);
+
+	currif->address_family = get_address_family(addr_fams, address_family_name);
+	if (!currif->address_family) {
+	error_msg("%s:%d: unknown address type", filename, line);
+	return NULL;
+	}
+
+	currif->method = get_method(currif->address_family, method_name);
+	if (!currif->method) {
+	error_msg("%s:%d: unknown method", filename, line);
+	return NULL;
+	}
+
+	currif->automatic = 1;
+	currif->max_options = 0;
+	currif->n_options = 0;
+	currif->option = NULL;
+
+
+	{
+	interface_defn **where = &defn->ifaces;
+
+	while (*where != NULL) {
+	if (duplicate_if(*where, currif)) {
+	error_msg("%s:%d: duplicate interface", filename, line);
+	return NULL;
+	}
+	where = &(*where)->next;
+	}
+
+	*where = currif;
+	currif->next = NULL;
+	}
+	}
+	currently_processing = IFACE;
+	} else if (strcmp(firstword, "auto") == 0) {
+	while ((rest = next_word(rest, firstword, 80))) {
+	int i;
+
+	for (i = 0; i < defn->n_autointerfaces; i++) {
+	if (strcmp(firstword, defn->autointerfaces[i]) == 0) {
+	perror_msg("%s:%d: interface declared auto twice", filename, line);
+	return NULL;
+	}
+	}
+
+	if (defn->n_autointerfaces == defn->max_autointerfaces) {
+	char **tmp;
+
+	defn->max_autointerfaces *= 2;
+	defn->max_autointerfaces++;
+	tmp = xrealloc(defn->autointerfaces, sizeof(tmp) defn->max_autointerfaces);
+	defn->autointerfaces = tmp;
+	}
+
+	defn->autointerfaces[defn->n_autointerfaces] = xstrdup(firstword);
+	defn->n_autointerfaces++;
+	}
+	currently_processing = NONE;
+	} else {
+	switch (currently_processing) {
+	case IFACE:
+	{
+	int i;
+
+	if (xstrlen(rest) == 0) {
+	error_msg("%s:%d: option with empty value", filename, line);
+	return NULL;
+	}
+
+	if (strcmp(firstword, "up") != 0
+	&& strcmp(firstword, "down") != 0
+	&& strcmp(firstword, "pre-up") != 0
+	&& strcmp(firstword, "post-down") != 0) {
+	for (i = 0; i < currif->n_options; i++) {
+	if (strcmp(currif->option[i].name, firstword) == 0) {
+	error_msg("%s:%d: duplicate option", filename, line);
+	return NULL;
+	}
+	}
+	}
+	}
+	if (currif->n_options >= currif->max_options) {
+	variable *opt;
+
+	currif->max_options = currif->max_options + 10;
+	opt = xrealloc(currif->option, sizeof(opt) currif->max_options);
+	currif->option = opt;
+	}
+	currif->option[currif->n_options].name = xstrdup(firstword);
+	currif->option[currif->n_options].value = xstrdup(rest);
+	if (!currif->option[currif->n_options].name) {
+	perror(filename);
+	return NULL;
+	}
+	if (!currif->option[currif->n_options].value) {
+	perror(filename);
+	return NULL;
+	}
+	currif->n_options++;
+	break;
+	case MAPPING:
+	if (strcmp(firstword, "script") == 0) {
+	if (currmap->script != NULL) {
+	error_msg("%s:%d: duplicate script in mapping", filename, line);
+	return NULL;
+	} else {
+	currmap->script = xstrdup(rest);
+	}
+	} else if (strcmp(firstword, "map") == 0) {
+	if (currmap->max_mappings == currmap->n_mappings) {
+	currmap->max_mappings = currmap->max_mappings * 2 + 1;
+	currmap->mapping = xrealloc(currmap->mapping, sizeof(char ) currmap->max_mappings);
+	}
+	currmap->mapping[currmap->n_mappings] = xstrdup(rest);
+	currmap->n_mappings++;
+	} else {
+	error_msg("%s:%d: misplaced option", filename, line);
+	return NULL;
+	}
+	break;
+	case NONE:
+	default:
+	error_msg("%s:%d: misplaced option", filename, line);
+	return NULL;
+	}
+	}
+	}
+	if (ferror(f) != 0) {
+	perror_msg("%s", filename);
+	return NULL;
+	}
+	fclose(f);
+	line = -1;
+
+	return defn;
+	}
+
+	static int check(char *str)
+	{
+	return (str != NULL);
+	}
+
+	static char setlocalenv(char format, char name, char value)
+	{
+	char *result;
+	char *here;
+	char *there;
+
+	result = xmalloc(xstrlen(format) + xstrlen(name) + xstrlen(value) + 1);
+
+	sprintf(result, format, name, value);
+
+	for (here = there = result; there != '=' && there; there++) {
+	if (*there == '-')
+	*there = '_';
+	if (isalpha(*there))
+	there = toupper(there);
+
+	if (isalnum(there) \|\| there == '_') {
+	here = there;
+	here++;
+	}
+	}
+	memmove(here, there, xstrlen(there) + 1);
+
+	return result;
+	}
+
+	static void set_environ(interface_defn iface, char mode)
+	{
+	char **environend;
+	int i;
+	const int n_env_entries = iface->n_options + 5;
+	char **ppch;
+
+	if (environ != NULL) {
+	for (ppch = environ; *ppch; ppch++) {
+	free(*ppch);
+	*ppch = NULL;
+	}
+	free(environ);
+	environ = NULL;
+	}
+	environ = xmalloc(sizeof(char ) (n_env_entries + 1 /* for final NULL */ ));
+	environend = environ;
+	*environend = NULL;
+
+	for (i = 0; i < iface->n_options; i++) {
+	if (strcmp(iface->option[i].name, "up") == 0
+	\|\| strcmp(iface->option[i].name, "down") == 0
+	\|\| strcmp(iface->option[i].name, "pre-up") == 0
+	\|\| strcmp(iface->option[i].name, "post-down") == 0) {
+	continue;
+	}
+	*(environend++) = setlocalenv("IF_%s=%s", iface->option[i].name, iface->option[i].value);
+	*environend = NULL;
+	}
+
+	*(environend++) = setlocalenv("%s=%s", "IFACE", iface->iface);
+	*environend = NULL;
+	*(environend++) = setlocalenv("%s=%s", "ADDRFAM", iface->address_family->name);
+	*environend = NULL;
+	*(environend++) = setlocalenv("%s=%s", "METHOD", iface->method->name);
+	*environend = NULL;
+	*(environend++) = setlocalenv("%s=%s", "MODE", mode);
+	*environend = NULL;
+	*(environend++) = setlocalenv("%s=%s", "PATH", "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin");
+	*environend = NULL;
+	}
+
+	static int doit(char *str)
+	{
+	if (verbose \|\| no_act) {
+	error_msg("%s", str);
+	}
+	if (!no_act) {
+	pid_t child;
+	int status;
+
+	fflush(NULL);
+	switch (child = fork()) {
+	case -1: /* failure */
+	return 0;
+	case 0: /* child */
+	execle("/bin/sh", "/bin/sh", "-c", str, NULL, environ);
+	exit(127);
+	default: /* parent */
+	}
+	waitpid(child, &status, 0);
+	if (!WIFEXITED(status) \|\| WEXITSTATUS(status) != 0) {
+	return 0;
+	}
+	}
+	return (1);
+	}
+
+	static int execute_all(interface_defn ifd, execfn exec, char *opt)
+	{
+	int i;
+	char buf[100];
+
+	for (i = 0; i < ifd->n_options; i++) {
+	if (strcmp(ifd->option[i].name, opt) == 0) {
+	if (!(*exec) (ifd->option[i].value)) {
+	return 0;
+	}
+	}
+	}
+
+	sprintf(buf, "run-parts /etc/network/if-%s.d", opt);
+	(*exec) (buf);
+
+	return (1);
+	}
+
+	static int iface_up(interface_defn *iface)
+	{
+	if (!iface->method->up(iface, check)) {
+	return (-1);
+	}
+
+	set_environ(iface, "start");
+	if (!execute_all(iface, doit, "pre-up")) {
+	return (0);
+	}
+	if (!iface->method->up(iface, doit)) {
+	return (0);
+	}
+	if (!execute_all(iface, doit, "up")) {
+	return (0);
+	}
+
+	return (1);
+	}
+
+	static int iface_down(interface_defn *iface)
+	{
+	if (!iface->method->down(iface, check)) {
+	return (-1);
+	}
+	set_environ(iface, "stop");
+	if (!execute_all(iface, doit, "down")) {
+	return (0);
+	}
+	if (!iface->method->down(iface, doit)) {
+	return (0);
+	}
+	if (!execute_all(iface, doit, "post-down")) {
+	return (0);
+	}
+	return (1);
+	}
+
+	static int popen2(FILE in, FILE out, char *command, ...)
+	{
+	va_list ap;
+	char *argv[11] = { command };
+	int argc;
+	int infd[2], outfd[2];
+	pid_t pid;
+
+	argc = 1;
+	va_start(ap, command);
+	while ((argc < 10) && (argv[argc] = va_arg(ap, char *))) {
+	argc++;
+	}
+	argv[argc] = NULL; /* make sure */
+	va_end(ap);
+
+	if (pipe(infd) != 0) {
+	return 0;
+	}
+
+	if (pipe(outfd) != 0) {
+	close(infd[0]);
+	close(infd[1]);
+	return 0;
+	}
+
+	fflush(NULL);
+	switch (pid = fork()) {
+	case -1: /* failure */
+	close(infd[0]);
+	close(infd[1]);
+	close(outfd[0]);
+	close(outfd[1]);
+	return 0;
+	case 0: /* child */
+	dup2(infd[0], 0);
+	dup2(outfd[1], 1);
+	close(infd[0]);
+	close(infd[1]);
+	close(outfd[0]);
+	close(outfd[1]);
+	execvp(command, argv);
+	exit(127);
+	default: /* parent */
+	*in = fdopen(infd[1], "w");
+	*out = fdopen(outfd[0], "r");
+	close(infd[0]);
+	close(outfd[1]);
+	return pid;
+	}
+	/* unreached */
+	}
+
+	static int run_mapping(char physical, char logical, int len, mapping_defn * map)
+	{
+	FILE in, out;
+	int i, status;
+	pid_t pid;
+
+
+	pid = popen2(&in, &out, map->script, physical, NULL);
+	if (pid == 0) {
+	return 0;
+	}
+	for (i = 0; i < map->n_mappings; i++) {
+	fprintf(in, "%s\n", map->mapping[i]);
+	}
+	fclose(in);
+	waitpid(pid, &status, 0);
+	if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
+	if (fgets(logical, len, out)) {
+	char *pch = logical + xstrlen(logical) - 1;
+
+	while (pch >= logical && isspace(*pch))
+	*(pch--) = '\0';
+	}
+	}
+	fclose(out);
+
+	return 1;
+	}
+
+	static int lookfor_iface(char *ifaces, int n_ifaces, char iface)
+	{
+	int i;
+
+	for (i = 0; i < n_ifaces; i++) {
+	if (strncmp(iface, ifaces[i], xstrlen(iface)) == 0) {
+	if (ifaces[i][xstrlen(iface)] == '=') {
+	return i;
+	}
+	}
+	}
+
+	return(-1);
+	}
+
+	static void add_to_state(char **ifaces, int n_ifaces, int max_ifaces, char new_iface)
+	{
+	if (max_ifaces == n_ifaces) {
+	max_ifaces = (max_ifaces * 2) + 1;
+	ifaces = xrealloc(ifaces, sizeof(*ifaces) *max_ifaces);
+	}
+
+	(ifaces)[(n_ifaces)++] = new_iface;
+	}
+
+	extern int ifupdown_main(int argc, char **argv)
+	{
+	int (cmds) (interface_defn ) = NULL;
+	struct option long_opts[] = {
+	{"help", no_argument, NULL, 'h'},
+	{"verbose", no_argument, NULL, 'v'},
+	{"all", no_argument, NULL, 'a'},
+	{"interfaces", required_argument, NULL, 'i'},
+	{"no-act", no_argument, NULL, 'n'},
+	{"no-mappings", no_argument, NULL, 1},
+	{"force", no_argument, NULL, 2},
+	{0, 0, 0, 0}
+	};
+	interfaces_file *defn;
+	FILE *state_fp = NULL;
+	char **target_iface = NULL;
+	char *state = NULL; / list of iface=liface */
+	char *interfaces = "/etc/network/interfaces";
+	char *statefile = "/etc/network/ifstate";
+
+	int do_all = 0;
+	int run_mappings = 1;
+	int force = 0;
+	int n_target_ifaces = 0;
+	int n_state = 0;
+	int max_state = 0;
+	int i;
+
+	if (applet_name[2] == 'u') {
+	/* ifup command */
+	cmds = iface_up;
+	} else {
+	/* ifdown command */
+	cmds = iface_down;
+	}
+
+	while ((i = getopt_long(argc, argv, "i:hvna", long_opts, NULL)) != EOF) {
+	switch (i) {
+	case 'i':
+	interfaces = xstrdup(optarg);
+	break;
+	case 'v':
+	verbose = 1;
+	break;
+	case 'a':
+	do_all = 1;
+	break;
+	case 'n':
+	no_act = 1;
+	break;
+	case 1:
+	run_mappings = 0;
+	break;
+	case 2:
+	force = 1;
+	break;
+	default:
+	show_usage();
+	break;
+	}
+	}
+
+	if (argc - optind > 0) {
+	if (do_all) {
+	show_usage();
+	}
+	} else {
+	if (!do_all) {
+	show_usage();
+	}
+	}
+
+	defn = read_interfaces(interfaces);
+	if (!defn) {
+	error_msg_and_die("couldn't read interfaces file \"%s\"", interfaces);
+	}
+
+	state_fp = fopen(statefile, no_act ? "r" : "a+");
+	if (state_fp == NULL && !no_act) {
+	perror_msg_and_die("failed to open statefile %s", statefile);
+	}
+
+	if (state_fp != NULL) {
+	char buf[80];
+	char *p;
+
+	if (!no_act) {
+	int flags;
+	struct flock lock;
+	const int state_fd = fileno(state_fp);
+
+	flags = fcntl(state_fd, F_GETFD);
+	if ((flags < 0) \|\| (fcntl(state_fd, F_SETFD, flags \| FD_CLOEXEC) < 0)) {
+	perror_msg_and_die("failed to set FD_CLOEXEC on statefile %s", statefile);
+	}
+
+	lock.l_type = F_WRLCK;
+	lock.l_whence = SEEK_SET;
+	lock.l_start = 0;
+	lock.l_len = 0;
+
+	if (fcntl(state_fd, F_SETLKW, &lock) < 0) {
+	perror_msg_and_die("failed to lock statefile %s", statefile);
+	}
+	}
+
+	rewind(state_fp);
+	while ((p = fgets(buf, sizeof buf, state_fp)) != NULL) {
+	char *pch;
+
+	pch = buf + xstrlen(buf) - 1;
+	while (pch > buf && isspace(*pch)) {
+	pch--;
+	}
+	*(pch + 1) = '\0';
+
+	pch = buf;
+	while (isspace(*pch)) {
+	pch++;
+	}
+
+	add_to_state(&state, &n_state, &max_state, xstrdup(pch));
+	}
+	}
+
+	if (do_all) {
+	if (cmds == iface_up) {
+	target_iface = defn->autointerfaces;
+	n_target_ifaces = defn->n_autointerfaces;
+	} else if (cmds == iface_down) {
+	target_iface = state;
+	n_target_ifaces = n_state;
+	}
+	} else {
+	target_iface = argv + optind;
+	n_target_ifaces = argc - optind;
+	}
+
+
+	for (i = 0; i < n_target_ifaces; i++) {
+	interface_defn *currif;
+	char iface[80];
+	char liface[80];
+	char *pch;
+	int okay = 0;
+
+	strncpy(iface, target_iface[i], sizeof(iface));
+	iface[sizeof(iface) - 1] = '\0';
+
+	if ((pch = strchr(iface, '='))) {
+	*pch = '\0';
+	strncpy(liface, pch + 1, sizeof(liface));
+	liface[sizeof(liface) - 1] = '\0';
+	} else {
+	strncpy(liface, iface, sizeof(liface));
+	liface[sizeof(liface) - 1] = '\0';
+	}
+	if (!force) {
+	int already_up = lookfor_iface(state, n_state, iface);;
+
+	if (cmds == iface_up) {
+	/* ifup */
+	if (already_up != -1) {
+	error_msg("interface %s already configured", iface);
+	continue;
+	}
+	} else {
+	/* ifdown */
+	if (already_up == -1) {
+	error_msg("interface %s not configured", iface);
+	continue;
+	}
+	strncpy(liface, strchr(state[already_up], '=') + 1, 80);
+	liface[79] = 0;
+	}
+	}
+
+	if ((cmds == iface_up) && run_mappings) {
+	mapping_defn *currmap;
+
+	for (currmap = defn->mappings; currmap; currmap = currmap->next) {
+
+	for (i = 0; i < currmap->n_matches; i++) {
+	if (fnmatch(currmap->match[i], liface, 0) != 0)
+	continue;
+	if (verbose) {
+	error_msg("Running mapping script %s on %s", currmap->script, liface);
+	}
+	run_mapping(iface, liface, sizeof(liface), currmap);
+	break;
+	}
+	}
+	}
+
+
+	for (currif = defn->ifaces; currif; currif = currif->next) {
+	if (strcmp(liface, currif->iface) == 0) {
+	char *oldiface = currif->iface;
+
+	okay = 1;
+
+	currif->iface = iface;
+
+	if (verbose) {
+	error_msg("Configuring interface %s=%s (%s)", iface, liface, currif->address_family->name);
+	}
+
+	switch (cmds(currif)) {
+	case -1:
+	printf
+	("Don't seem to be have all the variables for %s/%s.\n",
+	liface, currif->address_family->name);
+	break;
+	case 0:
+	/* this wasn't entirely successful, should it be added to
+	* the state file?
+	*/
+	case 1:
+	/* successful */
+	}
+	currif->iface = oldiface;
+	}
+	}
+
+	if (!okay && !force) {
+	error_msg("Ignoring unknown interface %s=%s.", iface, liface);
+	} else {
+	int already_up = lookfor_iface(state, n_state, iface);
+
+	if (cmds == iface_up) {
+	char *newiface = xmalloc(xstrlen(iface) + 1 + xstrlen(liface) + 1);
+	sprintf(newiface, "%s=%s", iface, liface);
+	if (already_up == -1) {
+	add_to_state(&state, &n_state, &max_state, newiface);
+	} else {
+	free(state[already_up]);
+	state[already_up] = newiface;
+	}
+	} else if (cmds == iface_down) {
+	if (already_up != -1) {
+	state[already_up] = state[--n_state];
+	}
+	}
+	}
+	if (state_fp != NULL && !no_act) {
+	if (ftruncate(fileno(state_fp), 0) < 0) {
+	error_msg_and_die("failed to truncate statefile %s: %s", statefile, strerror(errno));
+	}
+
+	rewind(state_fp);
+	for (i = 0; i < n_state; i++) {
+	fputs(state[i], state_fp);
+	fputc('\n', state_fp);
+	}
+	fflush(state_fp);
+	}
+	}
+
+	if (state_fp != NULL) {
+	fclose(state_fp);
+	state_fp = NULL;
+	}
+
+	return 0;
+	}