5 * Admin interface for configuration
7 * (c) 2001 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of Trivial IP Encryption (TrIPE).
14 * TrIPE is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
19 * TrIPE is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with TrIPE; if not, write to the Free Software Foundation,
26 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
29 /*----- Header files ------------------------------------------------------*/
33 /*----- Global variables --------------------------------------------------*/
37 const trace_opt tr_opts[] = {
38 { 't', T_TUNNEL, "tunnel events" },
39 { 'r', T_PEER, "peer events" },
40 { 'a', T_ADMIN, "admin interface" },
41 { 'p', T_PACKET, "packet contents" },
42 { 'c', T_CRYPTO, "crypto details" },
43 { 's', T_KEYSET, "symmetric keyset management" },
44 { 'x', T_KEYEXCH, "key exchange" },
45 { 'm', T_KEYMGMT, "key management" },
46 { 'A', T_ALL, "all of the above" },
50 unsigned tr_flags = 0;
53 static const trace_opt w_opts[] = {
54 { 't', AF_TRACE, "trace messages" },
55 { 'n', AF_NOTE, "asynchronous notifications" },
56 { 'w', AF_WARN, "warnings" },
57 { 'A', AF_ALLMSGS, "all of the above" },
61 /*----- Static variables --------------------------------------------------*/
65 static const char *sockname;
66 static unsigned flags = 0;
67 static admin *a_stdin = 0;
68 static sig s_term, s_int, s_hup;
73 #define T_RESOLVE SEC(30)
75 static void a_destroy(admin */*a*/);
76 static void a_lock(admin */*a*/);
77 static void a_unlock(admin */*a*/);
79 /*----- Output functions --------------------------------------------------*/
81 /* --- @mystrieq@ --- *
83 * Arguments: @const char *x, *y@ = two strings
85 * Returns: True if @x@ and @y are equal, up to case.
88 static int mystrieq(const char *x, const char *y)
91 if (!*x && !*y) return (1);
92 if (tolower((unsigned char)*x) != tolower((unsigned char)*y))
98 /* --- @trywrite@ --- *
100 * Arguments: @admin *a@ = pointer to an admin block
101 * @const char *p@ = pointer to buffer to write
102 * @size_t sz@ = size of data to write
104 * Returns: The number of bytes written, or less than zero on error.
106 * Use: Attempts to write data to a client.
109 static ssize_t trywrite(admin *a, const char *p, size_t sz)
116 n = write(a->w.fd, p, sz);
126 if (errno != EAGAIN && errno != EWOULDBLOCK) {
128 a_warn("ADMIN client-read-error -- %s", strerror(errno));
135 /* --- @dosend@ --- *
137 * Arguemnts: @admin *a@ = pointer to an admin block
138 * @const char *p@ = pointer to buffer to write
139 * @size_t sz@ = size of data to write
143 * Use: Sends data to an admin client.
146 static void dosend(admin *a, const char *p, size_t sz)
154 /* --- Try to send the data immediately --- */
157 if ((n = trywrite(a, p, sz)) < 0)
165 /* --- Fill buffers with the data until it's all gone --- */
170 else if (o->p_in < o->buf + OBUFSZ)
174 o = xmalloc(sizeof(obuf));
176 o->p_in = o->p_out = o->buf;
184 n = o->buf + OBUFSZ - o->p_in;
187 memcpy(o->p_in, p, n);
194 /* --- @a_flush@ --- *
196 * Arguments: @int fd@ = file descriptor
197 * @unsigned mode@ = what's happening
198 * @void *v@ = pointer to my admin block
202 * Use: Flushes buffers when a client is ready to read again.
205 static void a_flush(int fd, unsigned mode, void *v)
213 if ((n = trywrite(a, o->p_out, o->p_in - o->p_out)) < 0)
216 if (o->p_in < o->p_out)
229 /*----- Utility functions -------------------------------------------------*/
231 /* --- @a_write@, @a_vwrite@ --- *
233 * Arguments: @admin *a@ = admin connection to write to
234 * @const char *tag@ = tag prefix string, or null
235 * @const char *fmt@ = pointer to format string
236 * @va_list ap@ = arguments in list
237 * @...@ = other arguments
241 * Use: Sends a message to an admin connection.
244 static void a_vwrite(admin *a, const char *tag, const char *fmt, va_list ap)
253 dstr_vputf(&d, fmt, &ap);
255 dosend(a, d.buf, d.len);
259 static void a_write(admin *a, const char *tag, const char *fmt, ...)
263 a_vwrite(a, tag, fmt, ap);
267 /* --- @a_ok@, @a_info@, @a_fail@ --- *
269 * Arguments: @admin *a@ = connection
270 * @const char *fmt@ = format string
271 * @...@ = other arguments
275 * Use: Convenience functions for @a_write@.
278 static void a_ok(admin *a) { a_write(a, "OK", 0); }
280 static void a_info(admin *a, const char *fmt, ...)
284 a_vwrite(a, "INFO", fmt, ap);
288 static void a_fail(admin *a, const char *fmt, ...)
292 a_vwrite(a, "FAIL", fmt, ap);
296 /* --- @a_alert@, @a_valert@, @a_rawalert@ --- *
298 * Arguments: @unsigned f_and, f_eq@ = filter for connections
299 * @const char *tag@ = tag prefix string
300 * @const char *fmt@ = pointer to format string
301 @ @const char *p@ = pointer to raw string
302 * @size_t sz@ = size of raw string
303 * @va_list ap@ = arguments in list
304 * @...@ = other arguments
308 * Use: Write a message to all admin connections matched by the given
312 static void a_rawalert(unsigned f_and, unsigned f_eq, const char *tag,
313 const char *p, size_t sz)
318 if (!(flags & F_INIT))
326 dstr_putm(&d, p, sz);
330 for (a = admins; a; a = aa) {
332 if ((a->f & f_and) == f_eq)
333 dosend(a, d.buf, d.len);
338 static void a_valert(unsigned f_and, unsigned f_eq, const char *tag,
339 const char *fmt, va_list ap)
343 if (!(flags & F_INIT))
346 dstr_vputf(&d, fmt, &ap);
347 a_rawalert(f_and, f_eq, tag, fmt ? d.buf : 0, fmt ? d.len : 0);
352 static void a_alert(unsigned f_and, unsigned f_eq, const char *tag,
353 const char *fmt, ...)
357 a_valert(f_and, f_eq, tag, fmt, ap);
362 /* --- @a_warn@ --- *
364 * Arguments: @const char *fmt@ = pointer to format string
365 * @...@ = other arguments
369 * Use: Informs all admin connections of a warning.
372 void a_warn(const char *fmt, ...)
378 a_valert(0, 0, "WARN", fmt, ap);
380 fprintf(stderr, "%s: ", QUIS);
381 vfprintf(stderr, fmt, ap);
387 /* --- @a_trace@ --- *
389 * Arguments: @const char *p@ = pointer to a buffer
390 * @size_t sz@ = size of the buffer
391 * @void *v@ = uninteresting pointer
395 * Use: Custom trace output handler. Sends trace messages to
396 * interested admin connections.
400 static void a_trace(const char *p, size_t sz, void *v)
402 a_rawalert(AF_TRACE, AF_TRACE, "TRACE", p, sz);
406 /* --- @a_notify@ --- *
408 * Arguments: @const char *fmt@ = pointer to format string
409 * @...@ = other arguments
413 * Use: Sends a notification to interested admin connections.
416 void a_notify(const char *fmt, ...)
421 a_valert(AF_NOTE, AF_NOTE, "NOTE", fmt, ap);
425 /* --- @a_quit@ --- *
431 * Use: Shuts things down nicely.
441 /* --- @a_sigdie@ --- *
443 * Arguments: @int sig@ = signal number
444 * @void *v@ = an uninteresting argument
448 * Use Shuts down on receipt of a fatal signal.
451 static void a_sigdie(int sig, void *v)
457 case SIGTERM: p = "SIGTERM"; break;
458 case SIGINT: p = "SIGINT"; break;
460 sprintf(buf, "%i", sig);
464 a_warn("SERVER quit signal %s", p);
468 /* --- @a_sighup@ --- *
470 * Arguments: @int sig@ = signal number
471 * @void *v@ = an uninteresting argument
475 * Use Logs a message about SIGHUP not being useful.
478 static void a_sighup(int sig, void *v)
480 a_warn("SERVER ignore signal SIGHUP");
483 /*----- Adding peers ------------------------------------------------------*/
485 /* --- @a_resolve@ --- *
487 * Arguments: @struct hostent *h@ = pointer to resolved hostname
488 * @void *v@ = pointer to admin block
492 * Use: Handles a completed name resolution.
495 static void a_resolve(struct hostent *h, void *v)
500 T( trace(T_ADMIN, "admin: %u resolved", a->seq); )
504 a_fail(a, "resolve-error %s", a->paddr);
505 else if (p_find(a->pname))
506 a_fail(a, "peer-exists %s", a->pname);
508 memcpy(&a->peer.sin.sin_addr, h->h_addr, sizeof(struct in_addr));
509 if (!p_create(a->pname, &a->peer.sa, a->sasz))
510 a_fail(a, "peer-create-fail %s", a->pname);
517 selbuf_enable(&a->b);
521 /* --- @a_timer@ --- *
523 * Arguments: @struct timeval *tv@ = timer
524 * @void *v@ = pointer to admin block
528 * Use: Times out a resolver.
531 static void a_timer(struct timeval *tv, void *v)
536 T( trace(T_ADMIN, "admin: %u resolver timeout", a->seq); )
538 a_fail(a, "resolver-timeout %s\n", a->paddr);
542 selbuf_enable(&a->b);
546 /* --- @acmd_add@ --- *
548 * Arguments: @admin *a@ = connection which requested the addition
549 * @unsigned ac@ = argument count
550 * @char *av[]@ = pointer to the argument list
554 * Use: Adds a new peer.
557 static void acmd_add(admin *a, unsigned ac, char *av[])
564 /* --- Make sure someone's not got there already --- */
567 a_fail(a, "peer-exists %s", av[0]);
571 /* --- Fill in the easy bits of address --- */
575 if (mystrieq(av[i], "inet")) i++;
577 a_fail(a, "bad-syntax -- add PEER [inet] ADDRESS PORT");
580 a->peer.sin.sin_family = AF_INET;
581 a->sasz = sizeof(a->peer.sin);
582 pt = strtoul(av[i + 1], &p, 0);
584 struct servent *s = getservbyname(av[i + 1], "udp");
586 a_fail(a, "unknown-service %s", av[i + 1]);
589 pt = ntohs(s->s_port);
591 if (pt == 0 || pt >= 65536) {
592 a_fail(a, "invalid-port %lu", pt);
595 a->peer.sin.sin_port = htons(pt);
597 /* --- If the name is numeric, do it the easy way --- */
599 if (inet_aton(av[i], &a->peer.sin.sin_addr)) {
600 if (!p_create(av[0], &a->peer.sa, a->sasz))
601 a_fail(a, "peer-create-fail %s", a->pname);
607 /* --- Store everything for later and crank up the resolver --- *
609 * We disable the line buffer until the resolver completes (or times out).
610 * This prevents other commands on the same connection (though the rest of
611 * the system continues regardless), but makes life simpler for the client.
614 a->pname = xstrdup(av[0]);
615 a->paddr = xstrdup(av[i]);
616 selbuf_disable(&a->b);
617 gettimeofday(&tv, 0);
618 tv.tv_sec += T_RESOLVE;
619 sel_addtimer(&sel, &a->t, &tv, a_timer, a);
620 bres_byname(&a->r, a->paddr, a_resolve, a);
621 T( trace(T_ADMIN, "admin: %u resolving hostname `%s'",
625 /*----- Administration commands -------------------------------------------*/
627 /* --- Miscellaneous commands --- */
629 /* --- @traceish@ --- *
631 * Arguments: @admin *a@ = connection to complain on
632 * @unsigned ac@ = number of arguments
633 * @char *av[]@ = vector of arguments
634 * @const char *what@ = what we're messing with
635 * @const trace_opt *tt@ = options table
636 * @unsigned *ff@ = where the flags are
638 * Returns: Nonzero if anything changed.
640 * Use: Guts of trace-ish commands like `trace' and `watch'.
643 static int traceish(admin *a, unsigned ac, char *av[],
644 const char *what, const trace_opt *tt, unsigned *ff)
648 if (!ac || strcmp(av[0], "?") == 0) {
650 a_info(a, "Current %s status:", what);
651 for (t = tt; t->ch; t++) {
652 a_info(a, "%c %c %s",
653 t->ch, (*ff & t->f) == t->f ? '*' : ' ', t->help);
663 case '+': sense = 1; break;
664 case '-': sense = 0; break;
666 for (t = tt; t->ch; t++) {
668 if (sense) f |= t->f;
673 a_fail(a, "bad-%s-option %c", what, *p);
689 static void acmd_trace(admin *a, unsigned ac, char *av[])
691 if (traceish(a, ac, av, "trace", tr_opts, &tr_flags))
692 trace_level(tr_flags);
697 static void acmd_watch(admin *a, unsigned ac, char *av[])
699 traceish(a, ac, av, "watch", w_opts, &a->f);
702 static void quotify(dstr *d, const char *p)
706 if (*p && !p[strcspn(p, "\"' \t\n\v")])
711 if (*p == '\\' || *p == '\"')
719 static void alertcmd(admin *a, unsigned f_and, unsigned f_eq,
720 const char *tag, unsigned ac, char *av[])
725 dstr_puts(&d, "USER");
726 for (i = 0; i < ac; i++)
729 a_rawalert(f_and, f_eq, tag, d.buf, d.len);
734 static void acmd_notify(admin *a, unsigned ac, char *av[])
735 { alertcmd(a, AF_NOTE, AF_NOTE, "NOTE", ac, av); }
736 static void acmd_warn(admin *a, unsigned ac, char *av[])
737 { alertcmd(a, AF_WARN, AF_WARN, "WARN", ac, av); }
739 static void acmd_port(admin *a, unsigned ac, char *av[])
741 a_info(a, "%u", p_port());
745 static void acmd_daemon(admin *a, unsigned ac, char *av[])
747 if (flags & F_DAEMON)
748 a_fail(a, "already-daemon");
754 a_fail(a, "daemon-error -- %s", strerror(errno));
762 static void acmd_list(admin *a, unsigned ac, char *av[])
765 for (p = p_first(); p; p = p_next(p))
766 a_info(a, "%s", p_name(p));
770 static void acmd_ifname(admin *a, unsigned ac, char *av[])
774 if ((p = p_find(av[0])) == 0)
775 a_fail(a, "unknown-peer %s", av[0]);
777 a_info(a, "%s", p_ifname(p));
782 static void acmd_addr(admin *a, unsigned ac, char *av[])
787 if ((p = p_find(av[0])) == 0)
788 a_fail(a, "unknown-peer %s", av[0]);
791 assert(ad->sa.sa_family == AF_INET);
792 a_info(a, "INET %s %u",
793 inet_ntoa(ad->sin.sin_addr),
794 (unsigned)ntohs(ad->sin.sin_port));
799 static void acmd_stats(admin *a, unsigned ac, char *av[])
804 if ((p = p_find(av[0])) == 0)
805 a_fail(a, "unknown-peer %s", av[0]);
808 a_info(a, "start-time=%s", timestr(st->t_start));
809 a_info(a, "last-packet-time=%s", timestr(st->t_last));
810 a_info(a, "last-keyexch-time=%s", timestr(st->t_kx));
811 a_info(a, "packets-in=%lu bytes-in=%lu", st->n_in, st->sz_in);
812 a_info(a, "packets-out=%lu bytes-out=%lu",
813 st->n_out, st->sz_out);
814 a_info(a, "keyexch-packets-in=%lu keyexch-bytes-in=%lu",
815 st->n_kxin, st->sz_kxin);
816 a_info(a, "keyexch-packets-out=%lu keyexch-bytes-out=%lu",
817 st->n_kxout, st->sz_kxout);
818 a_info(a, "ip-packets-in=%lu ip-bytes-in=%lu",
819 st->n_ipin, st->sz_ipin);
820 a_info(a, "ip-packets-out=%lu ip-bytes-out=%lu",
821 st->n_ipout, st->sz_ipout);
822 a_info(a, "rejected-packets=%lu", st->n_reject);
827 static void acmd_kill(admin *a, unsigned ac, char *av[])
830 if ((p = p_find(av[0])) == 0)
831 a_fail(a, "unknown-peer %s", av[0]);
838 static void acmd_quit(admin *a, unsigned ac, char *av[])
840 a_warn("SERVER quit admin-request");
845 static void acmd_version(admin *a, unsigned ac, char *av[])
847 a_info(a, "%s %s", PACKAGE, VERSION);
851 /* --- The command table and help --- */
853 typedef struct acmd {
856 unsigned argmin, argmax;
857 void (*func)(admin */*a*/, unsigned /*ac*/, char */*av*/[]);
860 static void acmd_help(admin */*a*/, unsigned /*ac*/, char */*av*/[]);
862 static const acmd acmdtab[] = {
863 { "help", "help", 0, 0, acmd_help },
864 { "version", "version", 0, 0, acmd_version },
866 { "trace", "trace [OPTIONS]", 0, 1, acmd_trace },
868 { "watch", "watch [OPTIONS]", 0, 1, acmd_watch },
869 { "notify", "notify MESSAGE ...", 1, 0xffff, acmd_notify },
870 { "warn", "warn MESSAGE ...", 1, 0xffff, acmd_warn },
871 { "port", "port", 0, 0, acmd_port },
872 { "daemon", "daemon", 0, 0, acmd_daemon },
873 { "list", "list", 0, 0, acmd_list },
874 { "ifname", "ifname PEER", 1, 1, acmd_ifname },
875 { "addr", "addr PEER", 1, 1, acmd_addr },
876 { "stats", "stats PEER", 1, 1, acmd_stats },
877 { "kill", "kill PEER", 1, 1, acmd_kill },
878 { "add", "add PEER ADDR ...", 2, 0xffff, acmd_add },
879 { "quit", "quit", 0, 0, acmd_quit },
883 static void acmd_help(admin *a, unsigned ac, char *av[])
886 for (c = acmdtab; c->name; c++)
887 a_info(a, "%s", c->help);
891 /*----- Connection handling -----------------------------------------------*/
893 /* --- @a_lock@ --- *
895 * Arguments: @admin *a@ = pointer to an admin block
899 * Use: Locks an admin block so that it won't be destroyed
903 static void a_lock(admin *a) { assert(!(a->f & AF_LOCK)); a->f |= AF_LOCK; }
905 /* --- @a_unlock@ --- *
907 * Arguments: @admin *a@ = pointer to an admin block
911 * Use: Unlocks an admin block, allowing its destruction. This is
912 * also the second half of @a_destroy@.
915 static void a_unlock(admin *a)
917 assert(a->f & AF_LOCK);
918 if (!(a->f & AF_DEAD)) {
923 T( trace(T_ADMIN, "admin: completing destruction of connection %u",
926 selbuf_destroy(&a->b);
933 if (a->b.reader.fd != a->w.fd)
934 close(a->b.reader.fd);
940 a->next->prev = a->prev;
942 a->prev->next = a->next;
948 /* --- @a_destroy@ --- *
950 * Arguments: @admin *a@ = pointer to an admin block
954 * Use: Destroys an admin block. This requires a certain amount of
958 static void a_destroy(admin *a)
960 /* --- Don't multiply destroy admin blocks --- */
965 /* --- Make sure nobody expects it to work --- */
968 T( trace(T_ADMIN, "admin: destroying connection %u", a->seq); )
970 /* --- Free the output buffers --- */
975 for (o = a->o_head; o; o = oo) {
982 /* --- If the block is locked, that's all we can manage --- */
984 if (a->f & AF_LOCK) {
985 T( trace(T_ADMIN, "admin: deferring destruction..."); )
992 /* --- @a_line@ --- *
994 * Arguments: @char *p@ = pointer to the line read
995 * @size_t len@ = length of the line
996 * @void *vp@ = pointer to my admin block
1000 * Use: Handles a line of input.
1003 static void a_line(char *p, size_t len, void *vp)
1017 ac = str_qsplit(p, av, 16, 0, STRF_QUOTE);
1020 for (c = acmdtab; c->name; c++) {
1021 if (mystrieq(av[0], c->name)) {
1023 if (c->argmin > ac || ac > c->argmax)
1024 a_fail(a, "bad-syntax -- %s", c->help);
1027 c->func(a, ac, av + 1);
1033 a_fail(a, "unknown-command %s", av[0]);
1036 /* --- @a_create@ --- *
1038 * Arguments: @int fd_in, fd_out@ = file descriptors to use
1039 * @unsigned f@ = initial flags to set
1043 * Use: Creates a new admin connection.
1046 void a_create(int fd_in, int fd_out, unsigned f)
1048 admin *a = CREATE(admin);
1050 T( static unsigned seq = 0;
1052 T( trace(T_ADMIN, "admin: accepted connection %u", a->seq); )
1055 if (fd_in == STDIN_FILENO)
1057 fdflags(fd_in, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC);
1058 if (fd_out != fd_in)
1059 fdflags(fd_out, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC);
1060 selbuf_init(&a->b, &sel, fd_in, a_line, a);
1061 sel_initfile(&sel, &a->w, fd_out, SEL_WRITE, a_flush, a);
1071 /* --- @a_accept@ --- *
1073 * Arguments: @int fd@ = file descriptor to accept
1074 * @unsigned mode@ = what to do
1075 * @void *v@ = uninteresting pointer
1079 * Use: Accepts a new admin connection.
1082 static void a_accept(int fd, unsigned mode, void *v)
1085 struct sockaddr_un sun;
1086 size_t sz = sizeof(sun);
1088 if ((nfd = accept(fd, (struct sockaddr *)&sun, &sz)) < 0) {
1089 if (errno != EINTR && errno != EAGAIN && errno != EWOULDBLOCK &&
1090 errno != ECONNABORTED && errno != EPROTO)
1091 a_warn("ADMIN accept-error -- %s", strerror(errno));
1094 a_create(nfd, nfd, 0);
1097 /* --- @a_daemon@ --- *
1103 * Use: Informs the admin module that it's a daemon.
1111 /* --- @a_init@ --- *
1113 * Arguments: @const char *name@ = socket name to create
1117 * Use: Creates the admin listening socket.
1120 void a_init(const char *name)
1124 struct sockaddr_un sun;
1125 struct sigaction sa;
1128 /* --- Set up the socket address --- */
1130 sz = strlen(name) + 1;
1131 if (sz > sizeof(sun.sun_path))
1132 die(EXIT_FAILURE, "socket name `%s' too long", name);
1134 sun.sun_family = AF_UNIX;
1135 memcpy(sun.sun_path, name, sz);
1136 sz += offsetof(struct sockaddr_un, sun_path);
1138 /* --- Attempt to bind to the socket --- */
1142 if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
1143 die(EXIT_FAILURE, "couldn't create socket: %s", strerror(errno));
1144 if (bind(fd, (struct sockaddr *)&sun, sz) < 0) {
1147 if (errno != EADDRINUSE) {
1148 die(EXIT_FAILURE, "couldn't bind to address `%s': %s",
1149 sun.sun_path, strerror(e));
1152 die(EXIT_FAILURE, "too many retries; giving up");
1154 if (!connect(fd, (struct sockaddr *)&sun, sz)) {
1155 die(EXIT_FAILURE, "server already listening on admin socket `%s'",
1158 if (errno != ECONNREFUSED)
1159 die(EXIT_FAILURE, "couldn't bind to address: %s", strerror(e));
1160 if (stat(sun.sun_path, &st)) {
1161 die(EXIT_FAILURE, "couldn't stat `%s': %s",
1162 sun.sun_path, strerror(errno));
1164 if (!S_ISSOCK(st.st_mode))
1165 die(EXIT_FAILURE, "object `%s' isn't a socket", sun.sun_path);
1166 T( trace(T_ADMIN, "admin: stale socket found; removing it"); )
1167 unlink(sun.sun_path);
1171 chmod(sun.sun_path, 0600);
1172 fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC);
1174 die(EXIT_FAILURE, "couldn't listen on socket: %s", strerror(errno));
1176 /* --- Listen to the socket --- */
1178 sel_initfile(&sel, &sock, fd, SEL_READ, a_accept, 0);
1182 T( trace_custom(a_trace, 0);
1183 trace(T_ADMIN, "admin: enabled custom tracing"); )
1186 /* --- Set up signal handlers --- */
1188 sig_add(&s_term, SIGTERM, a_sigdie, 0);
1189 sig_add(&s_hup, SIGHUP, a_sighup, 0);
1190 signal(SIGPIPE, SIG_IGN);
1191 sigaction(SIGINT, 0, &sa);
1192 if (sa.sa_handler != SIG_IGN)
1193 sig_add(&s_int, SIGINT, a_sigdie, 0);
1196 /*----- That's all, folks -------------------------------------------------*/