3 * Based on ifupdown by Anthony Towns
4 * Copyright (c) 1999 Anthony Towns <aj@azure.humbug.org.au>
6 * Remove checks for kernel version, assume kernel version 2.2.0 or better
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 #include <sys/utsname.h>
41 #define IFUPDOWN_VERSION "0.6.4"
43 typedef struct interface_defn interface_defn;
45 typedef int (execfn)(char *command);
46 typedef int (command_set)(interface_defn *ifd, execfn *e);
48 typedef struct method {
54 typedef struct address_family {
60 typedef struct mapping_defn {
61 struct mapping_defn *next;
74 typedef struct variable {
79 struct interface_defn {
80 struct interface_defn *next;
83 address_family *address_family;
93 typedef struct interfaces_file {
94 int max_autointerfaces;
96 char **autointerfaces;
98 interface_defn *ifaces;
99 mapping_defn *mappings;
102 #define MAX_OPT_DEPTH 10
103 #define EUNBALBRACK 10001
104 #define EUNDEFVAR 10002
105 #define MAX_VARNAME 32
106 #define EUNBALPER 10000
108 static int no_act = 0;
109 static int verbose = 0;
110 static char **environ = NULL;
112 static int execable(char *program)
115 if (0 == stat(program, &buf)) {
116 if (S_ISREG(buf.st_mode) && (S_IXUSR & buf.st_mode)) {
123 static void addstr(char **buf, size_t *len, size_t *pos, char *str, size_t str_length)
125 if (*pos + str_length >= *len) {
128 newbuf = xrealloc(*buf, *len * 2 + str_length + 1);
130 *len = *len * 2 + str_length + 1;
133 while (str_length-- >= 1) {
134 (*buf)[(*pos)++] = *str;
140 static int strncmpz(char *l, char *r, size_t llen)
142 int i = strncmp(l, r, llen);
151 static char *get_var(char *id, size_t idlen, interface_defn *ifd)
155 if (strncmpz(id, "iface", idlen) == 0) {
158 for (i = 0; i < ifd->n_options; i++) {
159 if (strncmpz(id, ifd->option[i].name, idlen) == 0) {
160 return (ifd->option[i].value);
168 static char *parse(char *command, interface_defn *ifd)
172 size_t pos = 0, len = 0;
173 size_t old_pos[MAX_OPT_DEPTH] = { 0 };
174 int okay[MAX_OPT_DEPTH] = { 1 };
181 addstr(&result, &len, &pos, command, 1);
186 addstr(&result, &len, &pos, command + 1, 1);
189 addstr(&result, &len, &pos, command, 1);
194 if (command[1] == '[' && opt_depth < MAX_OPT_DEPTH) {
195 old_pos[opt_depth] = pos;
200 addstr(&result, &len, &pos, "[", 1);
205 if (command[1] == ']' && opt_depth > 1) {
207 if (!okay[opt_depth]) {
208 pos = old_pos[opt_depth];
213 addstr(&result, &len, &pos, "]", 1);
223 nextpercent = strchr(command, '%');
230 varvalue = get_var(command, nextpercent - command, ifd);
233 addstr(&result, &len, &pos, varvalue, xstrlen(varvalue));
235 okay[opt_depth - 1] = 0;
238 command = nextpercent + 1;
259 static int execute(char *command, interface_defn *ifd, execfn *exec)
264 out = parse(command, ifd);
275 #ifdef CONFIG_FEATURE_IFUPDOWN_IPX
276 static int static_up_ipx(interface_defn *ifd, execfn *exec)
278 if (!execute("ipx_interface add %iface% %frame% %netnum%", ifd, exec)) {
284 static int static_down_ipx(interface_defn *ifd, execfn *exec)
286 if (!execute("ipx_interface del %iface% %frame%", ifd, exec)) {
292 static int dynamic_up(interface_defn *ifd, execfn *exec)
294 if (!execute("ipx_interface add %iface% %frame%", ifd, exec)) {
300 static int dynamic_down(interface_defn *ifd, execfn *exec)
302 if (!execute("ipx_interface del %iface% %frame%", ifd, exec)) {
308 static method methods_ipx[] = {
309 { "dynamic", dynamic_up, dynamic_down, },
310 { "static", static_up_ipx, static_down_ipx, },
313 address_family addr_ipx = {
315 sizeof(methods_ipx) / sizeof(struct method),
318 #endif /* IFUP_FEATURE_IPX */
320 #ifdef CONFIG_FEATURE_IFUPDOWN_IPV6
321 static int loopback_up6(interface_defn *ifd, execfn *exec)
323 if (!execute("ifconfig %iface% add ::1", ifd, exec)) {
329 static int loopback_down6(interface_defn *ifd, execfn *exec)
331 if (!execute("ifconfig %iface% del ::1", ifd, exec))
337 static int static_up6(interface_defn *ifd, execfn *exec)
339 if (!execute("ifconfig %iface% [[media %media%]] [[hw %hwaddress%]] [[mtu %mtu%]] up", ifd, exec)) {
342 if (!execute("ifconfig %iface% add %address%/%netmask%", ifd, exec)) {
345 if (!execute("[[ route -A inet6 add ::/0 gw %gateway% ]]", ifd, exec)) {
351 static int static_down6(interface_defn *ifd, execfn *exec)
353 if (!execute("ifconfig %iface% down", ifd, exec)) {
359 static int v4tunnel_up(interface_defn *ifd, execfn *exec)
361 if (!execute("ip tunnel add %iface% mode sit remote %endpoint% [[local %local%]] [[ttl %ttl%]]", ifd, exec)) {
364 if (!execute("ip link set %iface% up", ifd, exec)) {
367 if (!execute("ip addr add %address%/%netmask% dev %iface%", ifd, exec)) {
370 if (!execute("[[ ip route add ::/0 via %gateway% ]]", ifd, exec)) {
376 static int v4tunnel_down(interface_defn * ifd, execfn * exec)
378 if (!execute("ip tunnel del %iface%", ifd, exec)) {
384 static method methods6[] = {
385 { "v4tunnel", v4tunnel_up, v4tunnel_down, },
386 { "static", static_up6, static_down6, },
387 { "loopback", loopback_up6, loopback_down6, },
390 address_family addr_inet6 = {
392 sizeof(methods6) / sizeof(struct method),
395 #endif /* CONFIG_FEATURE_IFUPDOWN_IPV6 */
397 #ifdef CONFIG_FEATURE_IFUPDOWN_IPV4
398 static int loopback_up(interface_defn *ifd, execfn *exec)
400 if (!execute("ifconfig %iface% 127.0.0.1 up", ifd, exec)) {
406 static int loopback_down(interface_defn *ifd, execfn *exec)
408 if (!execute("ifconfig %iface% down", ifd, exec)) {
414 static int static_up(interface_defn *ifd, execfn *exec)
416 if (!execute("ifconfig %iface% %address% netmask %netmask% [[broadcast %broadcast%]] [[pointopoint %pointopoint%]] [[media %media%]] [[mtu %mtu%]] [[hw %hwaddress%]] up",
420 if (!execute("[[ route add default gw %gateway% %iface% ]]", ifd, exec)) {
426 static int static_down(interface_defn *ifd, execfn *exec)
428 if (!execute("[[ route del default gw %gateway% %iface% ]]", ifd, exec)) {
431 if (!execute("ifconfig %iface% down", ifd, exec)) {
437 static int dhcp_up(interface_defn *ifd, execfn *exec)
439 if (execable("/sbin/dhclient")) {
440 if (!execute("dhclient -pf /var/run/dhclient.%iface%.pid %iface%", ifd, exec)) {
443 } else if (execable("/sbin/pump")) {
444 if (!execute("pump -i %iface% [[-h %hostname%]] [[-l %leasehours%]]", ifd, exec)) {
447 } else if (execable("/sbin/udhcpc")) {
448 if (!execute("udhcpc -n -p /var/run/udhcpc.%iface%.pid -i %iface% [[-H %hostname%]] [[-c %clientid%]]", ifd, exec)) {
451 } else if (execable("/sbin/dhcpcd")) {
452 if (!execute("dhcpcd [[-h %hostname%]] [[-i %vendor%]] [[-I %clientid%]] [[-l %leasetime%]] %iface%", ifd, exec)) {
459 static int dhcp_down(interface_defn *ifd, execfn *exec)
461 if (execable("/sbin/dhclient")) {
462 if (!execute("cat /var/run/dhclient.%iface%.pid | xargs -i kill -TERM {}", ifd, exec)) {
465 } else if (execable("/sbin/pump")) {
466 if (!execute("pump -i %iface% -k", ifd, exec)) {
469 } else if (execable("/sbin/udhcpc")) {
470 if (!execute("cat /var/run/udhcpc.%iface%.pid | xargs -i kill -TERM {}", ifd, exec)) {
473 } else if (execable("/sbin/dhcpcd")) {
474 if (!execute("dhcpcd -k %iface%", ifd, exec)) {
478 if (!execute("ifconfig %iface% down", ifd, exec)) {
484 static int bootp_up(interface_defn *ifd, execfn *exec)
486 if (!execute("bootpc [[--bootfile %bootfile%]] --dev %iface% [[--server %server%]] [[--hwaddr %hwaddr%]] --returniffail --serverbcast", ifd, exec)) {
492 static int bootp_down(interface_defn *ifd, execfn *exec)
494 if (!execute("ifconfig down %iface%", ifd, exec)) {
500 static int ppp_up(interface_defn *ifd, execfn *exec)
502 if (!execute("pon [[%provider%]]", ifd, exec)) {
508 static int ppp_down(interface_defn *ifd, execfn *exec)
510 if (!execute("poff [[%provider%]]", ifd, exec)) {
516 static int wvdial_up(interface_defn *ifd, execfn *exec)
518 if (!execute("/sbin/start-stop-daemon --start -x /usr/bin/wvdial -p /var/run/wvdial.%iface% -b -m -- [[ %provider% ]]", ifd, exec)) {
524 static int wvdial_down(interface_defn *ifd, execfn *exec)
526 if (!execute ("/sbin/start-stop-daemon --stop -x /usr/bin/wvdial -p /var/run/wvdial.%iface% -s 2", ifd, exec)) {
532 static method methods[] = {
533 { "wvdial", wvdial_up, wvdial_down, },
534 { "ppp", ppp_up, ppp_down, },
535 { "static", static_up, static_down, },
536 { "bootp", bootp_up, bootp_down, },
537 { "dhcp", dhcp_up, dhcp_down, },
538 { "loopback", loopback_up, loopback_down, },
541 address_family addr_inet = {
543 sizeof(methods) / sizeof(struct method),
547 #endif /* ifdef CONFIG_FEATURE_IFUPDOWN_IPV4 */
549 static char *next_word(char *buf, char *word, int maxlen)
556 while (!isspace(*buf) && *buf) {
565 while (isspace(*buf) && *buf) {
572 static address_family *get_address_family(address_family *af[], char *name)
576 for (i = 0; af[i]; i++) {
577 if (strcmp(af[i]->name, name) == 0) {
584 static method *get_method(address_family *af, char *name)
588 for (i = 0; i < af->n_methods; i++) {
589 if (strcmp(af->method[i].name, name) == 0) {
590 return &af->method[i];
596 static int duplicate_if(interface_defn *ifa, interface_defn *ifb)
598 if (strcmp(ifa->iface, ifb->iface) != 0) {
601 if (ifa->address_family != ifb->address_family) {
607 static int get_line(char **result, size_t * result_len, FILE * f, int *line)
614 if (*result_len - pos < 10) {
615 char *newstr = xrealloc(*result, *result_len * 2 + 80);
617 *result_len = *result_len * 2 + 80;
620 if (!fgets(*result + pos, *result_len - pos, f)) {
621 if (ferror(f) == 0 && pos == 0)
626 pos += xstrlen(*result + pos);
627 } while (pos == *result_len - 1 && (*result)[pos - 1] != '\n');
629 if (pos != 0 && (*result)[pos - 1] == '\n') {
630 (*result)[--pos] = '\0';
637 while (isspace((*result)[first]) && (*result)[first]) {
641 memmove(*result, *result + first, pos - first + 1);
644 } while ((*result)[0] == '#');
646 while ((*result)[pos - 1] == '\\') {
647 (*result)[--pos] = '\0';
649 if (*result_len - pos < 10) {
650 char *newstr = xrealloc(*result, *result_len * 2 + 80);
652 *result_len = *result_len * 2 + 80;
655 if (!fgets(*result + pos, *result_len - pos, f)) {
656 if (ferror(f) == 0 && pos == 0)
661 pos += xstrlen(*result + pos);
662 } while (pos == *result_len - 1 && (*result)[pos - 1] != '\n');
664 if (pos != 0 && (*result)[pos - 1] == '\n') {
665 (*result)[--pos] = '\0';
670 while (isspace((*result)[pos - 1])) { /* remove trailing whitespace */
673 (*result)[pos] = '\0';
678 static interfaces_file *read_interfaces(char *filename)
680 interface_defn *currif = NULL;
681 interfaces_file *defn;
682 mapping_defn *currmap = NULL;
690 enum { NONE, IFACE, MAPPING } currently_processing = NONE;
692 defn = xmalloc(sizeof(interfaces_file));
693 defn->max_autointerfaces = defn->n_autointerfaces = 0;
694 defn->autointerfaces = NULL;
695 defn->mappings = NULL;
697 f = fopen(filename, "r");
703 while (get_line(&buf, &buf_len, f, &line)) {
704 rest = next_word(buf, firstword, 80);
706 continue; /* blank line */
709 if (strcmp(firstword, "mapping") == 0) {
711 currmap = xmalloc(sizeof(mapping_defn));
712 currmap->max_matches = 0;
713 currmap->n_matches = 0;
714 currmap->match = NULL;
716 while ((rest = next_word(rest, firstword, 80))) {
717 if (currmap->max_matches == currmap->n_matches) {
718 currmap->max_matches = currmap->max_matches * 2 + 1;
719 currmap->match = xrealloc(currmap->match, sizeof(currmap->match) * currmap->max_matches);
722 currmap->match[currmap->n_matches++] = xstrdup(firstword);
724 currmap->max_mappings = 0;
725 currmap->n_mappings = 0;
726 currmap->mapping = NULL;
727 currmap->script = NULL;
729 mapping_defn **where = &defn->mappings;
730 while (*where != NULL) {
731 where = &(*where)->next;
734 currmap->next = NULL;
736 currently_processing = MAPPING;
737 } else if (strcmp(firstword, "iface") == 0) {
740 char address_family_name[80];
741 char method_name[80];
742 address_family *addr_fams[] = {
743 #ifdef CONFIG_FEATURE_IFUPDOWN_IPV4
746 #ifdef CONFIG_FEATURE_IFUPDOWN_IPV6
749 #ifdef CONFIG_FEATURE_IFUPDOWN_IPX
755 currif = xmalloc(sizeof(interface_defn));
757 rest = next_word(rest, iface_name, 80);
758 rest = next_word(rest, address_family_name, 80);
759 rest = next_word(rest, method_name, 80);
762 error_msg("%s:%d: too few parameters for iface line", filename, line);
766 if (rest[0] != '\0') {
767 error_msg("%s:%d: too many parameters for iface line", filename, line);
771 currif->iface = xstrdup(iface_name);
773 currif->address_family = get_address_family(addr_fams, address_family_name);
774 if (!currif->address_family) {
775 error_msg("%s:%d: unknown address type", filename, line);
779 currif->method = get_method(currif->address_family, method_name);
780 if (!currif->method) {
781 error_msg("%s:%d: unknown method", filename, line);
785 currif->automatic = 1;
786 currif->max_options = 0;
787 currif->n_options = 0;
788 currif->option = NULL;
792 interface_defn **where = &defn->ifaces;
794 while (*where != NULL) {
795 if (duplicate_if(*where, currif)) {
796 error_msg("%s:%d: duplicate interface", filename, line);
799 where = &(*where)->next;
806 currently_processing = IFACE;
807 } else if (strcmp(firstword, "auto") == 0) {
808 while ((rest = next_word(rest, firstword, 80))) {
811 for (i = 0; i < defn->n_autointerfaces; i++) {
812 if (strcmp(firstword, defn->autointerfaces[i]) == 0) {
813 perror_msg("%s:%d: interface declared auto twice", filename, line);
818 if (defn->n_autointerfaces == defn->max_autointerfaces) {
821 defn->max_autointerfaces *= 2;
822 defn->max_autointerfaces++;
823 tmp = xrealloc(defn->autointerfaces, sizeof(*tmp) * defn->max_autointerfaces);
824 defn->autointerfaces = tmp;
827 defn->autointerfaces[defn->n_autointerfaces] = xstrdup(firstword);
828 defn->n_autointerfaces++;
830 currently_processing = NONE;
832 switch (currently_processing) {
837 if (xstrlen(rest) == 0) {
838 error_msg("%s:%d: option with empty value", filename, line);
842 if (strcmp(firstword, "up") != 0
843 && strcmp(firstword, "down") != 0
844 && strcmp(firstword, "pre-up") != 0
845 && strcmp(firstword, "post-down") != 0) {
846 for (i = 0; i < currif->n_options; i++) {
847 if (strcmp(currif->option[i].name, firstword) == 0) {
848 error_msg("%s:%d: duplicate option", filename, line);
854 if (currif->n_options >= currif->max_options) {
857 currif->max_options = currif->max_options + 10;
858 opt = xrealloc(currif->option, sizeof(*opt) * currif->max_options);
859 currif->option = opt;
861 currif->option[currif->n_options].name = xstrdup(firstword);
862 currif->option[currif->n_options].value = xstrdup(rest);
863 if (!currif->option[currif->n_options].name) {
867 if (!currif->option[currif->n_options].value) {
874 if (strcmp(firstword, "script") == 0) {
875 if (currmap->script != NULL) {
876 error_msg("%s:%d: duplicate script in mapping", filename, line);
879 currmap->script = xstrdup(rest);
881 } else if (strcmp(firstword, "map") == 0) {
882 if (currmap->max_mappings == currmap->n_mappings) {
883 currmap->max_mappings = currmap->max_mappings * 2 + 1;
884 currmap->mapping = xrealloc(currmap->mapping, sizeof(char *) * currmap->max_mappings);
886 currmap->mapping[currmap->n_mappings] = xstrdup(rest);
887 currmap->n_mappings++;
889 error_msg("%s:%d: misplaced option", filename, line);
895 error_msg("%s:%d: misplaced option", filename, line);
900 if (ferror(f) != 0) {
901 perror_msg("%s", filename);
910 static int check(char *str)
912 return (str != NULL);
915 static char *setlocalenv(char *format, char *name, char *value)
921 result = xmalloc(xstrlen(format) + xstrlen(name) + xstrlen(value) + 1);
923 sprintf(result, format, name, value);
925 for (here = there = result; *there != '=' && *there; there++) {
929 *there = toupper(*there);
931 if (isalnum(*there) || *there == '_') {
936 memmove(here, there, xstrlen(there) + 1);
941 static void set_environ(interface_defn *iface, char *mode)
945 const int n_env_entries = iface->n_options + 5;
948 if (environ != NULL) {
949 for (ppch = environ; *ppch; ppch++) {
956 environ = xmalloc(sizeof(char *) * (n_env_entries + 1 /* for final NULL */ ));
957 environend = environ;
960 for (i = 0; i < iface->n_options; i++) {
961 if (strcmp(iface->option[i].name, "up") == 0
962 || strcmp(iface->option[i].name, "down") == 0
963 || strcmp(iface->option[i].name, "pre-up") == 0
964 || strcmp(iface->option[i].name, "post-down") == 0) {
967 *(environend++) = setlocalenv("IF_%s=%s", iface->option[i].name, iface->option[i].value);
971 *(environend++) = setlocalenv("%s=%s", "IFACE", iface->iface);
973 *(environend++) = setlocalenv("%s=%s", "ADDRFAM", iface->address_family->name);
975 *(environend++) = setlocalenv("%s=%s", "METHOD", iface->method->name);
977 *(environend++) = setlocalenv("%s=%s", "MODE", mode);
979 *(environend++) = setlocalenv("%s=%s", "PATH", "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin");
983 static int doit(char *str)
985 if (verbose || no_act) {
986 error_msg("%s", str);
993 switch (child = fork()) {
994 case -1: /* failure */
997 execle("/bin/sh", "/bin/sh", "-c", str, NULL, environ);
999 default: /* parent */
1001 waitpid(child, &status, 0);
1002 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
1009 static int execute_all(interface_defn *ifd, execfn *exec, char *opt)
1014 for (i = 0; i < ifd->n_options; i++) {
1015 if (strcmp(ifd->option[i].name, opt) == 0) {
1016 if (!(*exec) (ifd->option[i].value)) {
1022 sprintf(buf, "run-parts /etc/network/if-%s.d", opt);
1028 static int iface_up(interface_defn *iface)
1030 if (!iface->method->up(iface, check)) {
1034 set_environ(iface, "start");
1035 if (!execute_all(iface, doit, "pre-up")) {
1038 if (!iface->method->up(iface, doit)) {
1041 if (!execute_all(iface, doit, "up")) {
1048 static int iface_down(interface_defn *iface)
1050 if (!iface->method->down(iface, check)) {
1053 set_environ(iface, "stop");
1054 if (!execute_all(iface, doit, "down")) {
1057 if (!iface->method->down(iface, doit)) {
1060 if (!execute_all(iface, doit, "post-down")) {
1066 static int popen2(FILE **in, FILE **out, char *command, ...)
1069 char *argv[11] = { command };
1071 int infd[2], outfd[2];
1075 va_start(ap, command);
1076 while ((argc < 10) && (argv[argc] = va_arg(ap, char *))) {
1079 argv[argc] = NULL; /* make sure */
1082 if (pipe(infd) != 0) {
1086 if (pipe(outfd) != 0) {
1093 switch (pid = fork()) {
1094 case -1: /* failure */
1107 execvp(command, argv);
1109 default: /* parent */
1110 *in = fdopen(infd[1], "w");
1111 *out = fdopen(outfd[0], "r");
1119 static int run_mapping(char *physical, char *logical, int len, mapping_defn * map)
1126 pid = popen2(&in, &out, map->script, physical, NULL);
1130 for (i = 0; i < map->n_mappings; i++) {
1131 fprintf(in, "%s\n", map->mapping[i]);
1134 waitpid(pid, &status, 0);
1135 if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
1136 if (fgets(logical, len, out)) {
1137 char *pch = logical + xstrlen(logical) - 1;
1139 while (pch >= logical && isspace(*pch))
1148 static int lookfor_iface(char **ifaces, int n_ifaces, char *iface)
1152 for (i = 0; i < n_ifaces; i++) {
1153 if (strncmp(iface, ifaces[i], xstrlen(iface)) == 0) {
1154 if (ifaces[i][xstrlen(iface)] == '=') {
1163 static void add_to_state(char ***ifaces, int *n_ifaces, int *max_ifaces, char *new_iface)
1165 if (*max_ifaces == *n_ifaces) {
1166 *max_ifaces = (*max_ifaces * 2) + 1;
1167 *ifaces = xrealloc(*ifaces, sizeof(**ifaces) * *max_ifaces);
1170 (*ifaces)[(*n_ifaces)++] = new_iface;
1173 extern int ifupdown_main(int argc, char **argv)
1175 int (*cmds) (interface_defn *) = NULL;
1176 struct option long_opts[] = {
1177 {"help", no_argument, NULL, 'h'},
1178 {"verbose", no_argument, NULL, 'v'},
1179 {"all", no_argument, NULL, 'a'},
1180 {"interfaces", required_argument, NULL, 'i'},
1181 {"no-act", no_argument, NULL, 'n'},
1182 {"no-mappings", no_argument, NULL, 1},
1183 {"force", no_argument, NULL, 2},
1186 interfaces_file *defn;
1187 FILE *state_fp = NULL;
1188 char **target_iface = NULL;
1189 char **state = NULL; /* list of iface=liface */
1190 char *interfaces = "/etc/network/interfaces";
1191 char *statefile = "/etc/network/ifstate";
1194 int run_mappings = 1;
1196 int n_target_ifaces = 0;
1201 if (applet_name[2] == 'u') {
1205 /* ifdown command */
1209 while ((i = getopt_long(argc, argv, "i:hvna", long_opts, NULL)) != EOF) {
1212 interfaces = xstrdup(optarg);
1235 if (argc - optind > 0) {
1245 defn = read_interfaces(interfaces);
1247 error_msg_and_die("couldn't read interfaces file \"%s\"", interfaces);
1250 state_fp = fopen(statefile, no_act ? "r" : "a+");
1251 if (state_fp == NULL && !no_act) {
1252 perror_msg_and_die("failed to open statefile %s", statefile);
1255 if (state_fp != NULL) {
1262 const int state_fd = fileno(state_fp);
1264 flags = fcntl(state_fd, F_GETFD);
1265 if ((flags < 0) || (fcntl(state_fd, F_SETFD, flags | FD_CLOEXEC) < 0)) {
1266 perror_msg_and_die("failed to set FD_CLOEXEC on statefile %s", statefile);
1269 lock.l_type = F_WRLCK;
1270 lock.l_whence = SEEK_SET;
1274 if (fcntl(state_fd, F_SETLKW, &lock) < 0) {
1275 perror_msg_and_die("failed to lock statefile %s", statefile);
1280 while ((p = fgets(buf, sizeof buf, state_fp)) != NULL) {
1283 pch = buf + xstrlen(buf) - 1;
1284 while (pch > buf && isspace(*pch)) {
1290 while (isspace(*pch)) {
1294 add_to_state(&state, &n_state, &max_state, xstrdup(pch));
1299 if (cmds == iface_up) {
1300 target_iface = defn->autointerfaces;
1301 n_target_ifaces = defn->n_autointerfaces;
1302 } else if (cmds == iface_down) {
1303 target_iface = state;
1304 n_target_ifaces = n_state;
1307 target_iface = argv + optind;
1308 n_target_ifaces = argc - optind;
1312 for (i = 0; i < n_target_ifaces; i++) {
1313 interface_defn *currif;
1319 strncpy(iface, target_iface[i], sizeof(iface));
1320 iface[sizeof(iface) - 1] = '\0';
1322 if ((pch = strchr(iface, '='))) {
1324 strncpy(liface, pch + 1, sizeof(liface));
1325 liface[sizeof(liface) - 1] = '\0';
1327 strncpy(liface, iface, sizeof(liface));
1328 liface[sizeof(liface) - 1] = '\0';
1331 int already_up = lookfor_iface(state, n_state, iface);;
1333 if (cmds == iface_up) {
1335 if (already_up != -1) {
1336 error_msg("interface %s already configured", iface);
1341 if (already_up == -1) {
1342 error_msg("interface %s not configured", iface);
1345 strncpy(liface, strchr(state[already_up], '=') + 1, 80);
1350 if ((cmds == iface_up) && run_mappings) {
1351 mapping_defn *currmap;
1353 for (currmap = defn->mappings; currmap; currmap = currmap->next) {
1355 for (i = 0; i < currmap->n_matches; i++) {
1356 if (fnmatch(currmap->match[i], liface, 0) != 0)
1359 error_msg("Running mapping script %s on %s", currmap->script, liface);
1361 run_mapping(iface, liface, sizeof(liface), currmap);
1368 for (currif = defn->ifaces; currif; currif = currif->next) {
1369 if (strcmp(liface, currif->iface) == 0) {
1370 char *oldiface = currif->iface;
1374 currif->iface = iface;
1377 error_msg("Configuring interface %s=%s (%s)", iface, liface, currif->address_family->name);
1380 switch (cmds(currif)) {
1383 ("Don't seem to be have all the variables for %s/%s.\n",
1384 liface, currif->address_family->name);
1387 /* this wasn't entirely successful, should it be added to
1393 currif->iface = oldiface;
1397 if (!okay && !force) {
1398 error_msg("Ignoring unknown interface %s=%s.", iface, liface);
1400 int already_up = lookfor_iface(state, n_state, iface);
1402 if (cmds == iface_up) {
1403 char *newiface = xmalloc(xstrlen(iface) + 1 + xstrlen(liface) + 1);
1404 sprintf(newiface, "%s=%s", iface, liface);
1405 if (already_up == -1) {
1406 add_to_state(&state, &n_state, &max_state, newiface);
1408 free(state[already_up]);
1409 state[already_up] = newiface;
1411 } else if (cmds == iface_down) {
1412 if (already_up != -1) {
1413 state[already_up] = state[--n_state];
1417 if (state_fp != NULL && !no_act) {
1418 if (ftruncate(fileno(state_fp), 0) < 0) {
1419 error_msg_and_die("failed to truncate statefile %s: %s", statefile, strerror(errno));
1423 for (i = 0; i < n_state; i++) {
1424 fputs(state[i], state_fp);
1425 fputc('\n', state_fp);
1431 if (state_fp != NULL) {