3 * - close idle connections
4 * - cope better with garbage in feed file
5 * - cope better with NULs in feed file
10 * Newsfeeds file entries should look like this:
11 * host.name.of.site[/exclude,exclude,...]\
12 * :pattern,pattern...[/distribution,distribution...]\
16 * sitename[/exclude,exclude,...]\
17 * :pattern,pattern...[/distribution,distribution...]\
23 * or might be blanked out
24 * <spc><spc><spc><spc>....
26 * F site.name main feed file
27 * opened/created, then written, by innd
30 * tokens blanked out by duct when processed
31 * site.name_lock lock preventing multiple ducts
32 * to hold lock must open,F_SETLK[W]
33 * and then stat to check that locked file
34 * still has name site.name_lock
35 * holder of this lock is "duct"
36 * (only) lockholder may remove the lockfile
37 * D site.name_flushing temporary feed file during flush (or crash)
38 * hardlink created by duct
40 * site.name_defer 431'd articles, still being written,
41 * created, written, used by duct
43 * site.name_backlog.<date>.<inum>
44 * 431'd articles, ready for innxmit or duct
45 * created (link/mv) by duct
46 * site.name_backlog<anything-else> (where <anything-else> does not
47 * contain '#' or '~') eg
48 * site.name_backlog.manual
49 * anything the sysadmin likes (eg, feed files
50 * from old feeds to be merged into this one)
51 * created (link/mv) by admin
52 * may be symlinks (in which case links
53 * may be written through, but only links
56 * It is safe to remove backlog files manually,
57 * if it's desired to throw away the backlog.
59 * Backlog files are also processed by innduct. We find the oldest
60 * backlog file which is at least a certain amount old, and feed it
61 * back into our processing. When every article in it has been read
62 * and processed, we unlink it and look for another backlog file.
64 * If we don't have a backlog file that we're reading, we close the
65 * defer file that we're writing and make it into a backlog file at
66 * the first convenient opportunity.
77 | | <----------------<---------------------------------'|
83 | F: innd writing, duct reading |
86 | | duct decides time to flush |
87 | | duct makes hardlink |
89 | V <------------------------'|
91 | F == D: innd writing, duct reading both exist |
94 | | <-----------<-------------<--'|
98 | V <---------------------. |
101 | D: innd writing, duct reading; or ENOENT | |
103 | | duct requests flush of feed | |
104 | | (others can too, harmlessly) | |
108 | D: innd flushing, duct; or ENOENT | |
110 | | inndcomm flush fails | |
111 | |`-------------------------->------------------' |
113 | | inndcomm reports no such site |
114 | |`---------------------------------------------------- | -.
116 | | innd finishes writing D, creates F | |
117 | | inndcomm reports flush successful | |
120 | Separated <----------------' |
121 | F: innd writing F!=D /
122 | D: duct reading; or ENOENT both exist /
124 | | duct gets to the end of D /
125 | | duct opens F too /
128 | F: innd writing, duct reading |
129 | D: duct finishing V
131 | | duct finishes processing D F: ENOENT
132 | V duct unlinks D D: duct reading
134 `--<--' | duct finishes
144 "duct reading" means innduct is reading the file but also
145 overwriting processed tokens.
149 * rune for printing diagrams:
151 perl -ne 'print if m/-8\<-/..m/-\>8-/; print "\f" if m/-\^L-/' backends/innduct.c |a2ps -R -B -ops
156 /*============================== PROGRAM ==============================*/
160 #include "inn/list.h"
165 #include "inndcomm.h"
168 #include <sys/types.h>
169 #include <sys/wait.h>
170 #include <sys/stat.h>
171 #include <sys/socket.h>
186 #include <oop-read.h>
188 /*----- general definitions, probably best not changed -----*/
190 #define PERIOD_SECONDS 60
192 #define CONNCHILD_ESTATUS_STREAM 4
193 #define CONNCHILD_ESTATUS_NOSTREAM 5
195 #define INNDCOMMCHILD_ESTATUS_FAIL 6
196 #define INNDCOMMCHILD_ESTATUS_NONESUCH 7
198 #define MAX_LINE_FEEDFILE (NNTP_MSGID_MAXLEN + sizeof(TOKEN)*2 + 10)
200 /*----- doubly linked lists -----*/
202 #define ISNODE(T) struct { T *succ, *pred; } node /* must be at start */
203 #define DEFLIST(T) typedef struct { T *hd, *tl, *tp; int count; } T##List
205 #define NODE(n) (assert((void*)&(n)->node == &(n)), \
206 (struct node*)&(n)->node)
208 #define LIST_CHECKCANHAVENODE(l,n) \
209 ((void)((n) == ((l).hd))) /* just for the type check */
211 #define LIST_ADDSOMEHOW(l,n,list_addsomehow) \
212 ( LIST_CHECKCANHAVENODE(l,n), \
213 list_addsomehow((struct list*)&(l), NODE((n))), \
217 #define LIST_REMSOMEHOW(l,list_remsomehow) \
221 list_remsomehow((struct list*)&(l)) ) \
227 #define LIST_ADDHEAD(l,n) LIST_ADDSOMEHOW((l),(n),list_addhead)
228 #define LIST_ADDTAIL(l,n) LIST_ADDSOMEHOW((l),(n),list_addtail)
229 #define LIST_REMHEAD(l) LIST_REMSOMEHOW((l),list_remhead)
230 #define LIST_REMTAIL(l) LIST_REMSOMEHOW((l),list_remtail)
232 #define LIST_HEAD(l) ((typeof((l).hd))(list_head((struct list*)&(l))))
233 #define LIST_NEXT(n) ((typeof(n))list_succ(NODE((n))))
234 #define LIST_BACK(n) ((typeof(n))list_pred(NODE((n))))
236 #define LIST_REMOVE(l,n) \
237 ( LIST_CHECKCANHAVENODE(l,n), \
238 list_remove(NODE((n))), \
242 #define LIST_INSERT(l,n,pred) \
243 ( LIST_CHECKCANHAVENODE(l,n), \
244 LIST_CHECKCANHAVENODE(l,pred), \
245 list_insert((struct list*)&(l), NODE((n)), NODE((pred))), \
249 /*----- type predeclarations -----*/
251 typedef struct Conn Conn;
252 typedef struct Article Article;
253 typedef struct InputFile InputFile;
254 typedef struct XmitDetails XmitDetails;
255 typedef struct Filemon_Perfile Filemon_Perfile;
256 typedef enum StateMachineState StateMachineState;
261 /*----- function predeclarations -----*/
263 static void conn_maybe_write(Conn *conn);
264 static void conn_make_some_xmits(Conn *conn);
265 static void *conn_write_some_xmits(Conn *conn);
267 static void xmit_free(XmitDetails *d);
269 static void statemc_setstate(StateMachineState newsms, int periods,
270 const char *forlog, const char *why);
271 static void statemc_start_flush(const char *why); /* Normal => Flushing */
272 static void spawn_inndcomm_flush(const char *why); /* Moved => Flushing */
274 static void check_master_queue(void);
275 static void queue_check_input_done(void);
277 static void statemc_check_flushing_done(void);
278 static void statemc_check_backlog_done(void);
280 static void postfork(const char *what);
281 static void postfork_inputfile(InputFile *ipf);
283 static void open_defer(void);
284 static void close_defer(void);
285 static void search_backlog_file(void);
287 static void inputfile_tailing_start(InputFile *ipf);
288 static void inputfile_tailing_stop(InputFile *ipf);
290 static int filemon_init(void);
291 static void filemon_start(InputFile *ipf);
292 static void filemon_stop(InputFile *ipf);
293 static void filemon_callback(InputFile *ipf);
295 /*----- configuration options -----*/
297 static char *sitename, *feedfile;
298 static const char *remote_host;
299 static int quiet_multiple=0, become_daemon=1;
301 static int max_connections=10, max_queue_per_conn=200;
302 static int target_max_feedfile_size=100000;
304 static double max_bad_data_ratio= 0.01;
305 static int max_bad_data_initial= 30;
306 /* in one corrupt 4096-byte block the number of newlines has
307 * mean 16 and standard deviation 3.99. 30 corresponds to z=+3.5 */
309 static int connection_setup_timeout=200, port=119, try_stream=1;
310 static int inndcomm_flush_timeout=100;
311 static int reconnect_delay_periods, flushfail_retry_periods, open_wait_periods;
312 static int backlog_retry_minperiods, backlog_spontaneous_rescan_periods;
313 static int spontaneous_flush_periods;
314 static const char *inndconffile;
316 static double nocheck_thresh_pct= 95.0;
317 static double nocheck_thresh; /* computed in main from _pct */
318 static double nocheck_decay_articles= 100; /* converted to _decay */
319 static double nocheck_decay; /* computed in main from _articles */
322 /*----- statistics -----*/
324 typedef enum { /* in queue in conn->sent */
325 art_Unchecked, /* not checked, not sent checking */
326 art_Wanted, /* checked, wanted sent body as requested */
327 art_Unsolicited, /* - sent body without check */
331 #define RESULT_COUNTS(RCS,RCN) \
339 #define RCI_TRIPLE_FMT_BASE "%d(id%d+bd%d+nc%d)"
340 #define RCI_TRIPLE_VALS_BASE(counts,x) \
341 counts[art_Unchecked] x \
342 + counts[art_Wanted] x \
343 + counts[art_Unsolicited] x, \
344 counts[art_Unchecked] x \
345 , counts[art_Wanted] x \
346 , counts[art_Unsolicited] x
349 #define RC_INDEX(x) RC_##x,
350 RESULT_COUNTS(RC_INDEX, RC_INDEX)
355 /*----- transmission buffers -----*/
360 xk_Malloc, xk_Const, xk_Artdata
372 /*----- core operational data structure types -----*/
375 /* This is also an instance of struct oop_readable */
376 struct oop_readable readable; /* first */
377 oop_readable_call *readable_callback;
378 void *readable_callback_user;
381 Filemon_Perfile *filemon;
384 long inprogress; /* no. of articles read but not processed */
388 int counts[art_MaxState][RCI_max];
389 int readcount_ok, readcount_blank, readcount_err;
404 #define SMS_LIST(X) \
412 enum StateMachineState {
413 #define SMS_DEF_ENUM(s) sm_##s,
414 SMS_LIST(SMS_DEF_ENUM)
417 static const char *sms_names[]= {
418 #define SMS_DEF_NAME(s) #s ,
419 SMS_LIST(SMS_DEF_NAME)
425 int fd, max_queue, stream, quitting;
426 ArticleList waiting; /* not yet told peer */
427 ArticleList priority; /* peer says send it now */
428 ArticleList sent; /* offered/transmitted - in xmit or waiting reply */
429 struct iovec xmit[CONNIOVS];
430 XmitDetails xmitd[CONNIOVS];
435 /*----- operational variables -----*/
437 static oop_source *loop;
439 static int until_connect;
440 static ConnList conns;
441 static ArticleList queue;
443 static char *path_lock, *path_flushing, *path_defer, *globpat_backlog;
445 #define SMS(newstate, periods, why) \
446 (statemc_setstate(sm_##newstate,(periods),#newstate,(why)))
448 static StateMachineState sms;
450 static InputFile *main_input_file, *flushing_input_file, *backlog_input_file;
451 static int sm_period_counter, until_backlog_nextscan;
453 static double accept_proportion;
454 static int nocheck, nocheck_reported;
456 /*========== logging ==========*/
458 static void logcore(int sysloglevel, const char *fmt, ...)
459 __attribute__((__format__(printf,2,3)));
460 static void logcore(int sysloglevel, const char *fmt, ...) {
464 vsyslog(sysloglevel,fmt,al);
466 vfprintf(stderr,fmt,al);
472 static void logv(int sysloglevel, const char *pfx, int errnoval,
473 const char *fmt, va_list al)
474 __attribute__((__format__(printf,5,0)));
475 static void logv(int sysloglevel, const char *pfx, int errnoval,
476 const char *fmt, va_list al) {
477 char msgbuf[256]; /* NB do not call xvasprintf here or you'll recurse */
478 vsnprintf(msgbuf,sizeof(msgbuf), fmt,al);
479 msgbuf[sizeof(msgbuf)-1]= 0;
481 if (sysloglevel >= LOG_ERR && (errnoval==EACCES || errnoval==EPERM))
482 sysloglevel= LOG_ERR; /* run by wrong user, probably */
484 logcore(sysloglevel, "<%s>%s: %s%s%s",
485 sitename, pfx, msgbuf,
486 errnoval>=0 ? ": " : "",
487 errnoval>=0 ? strerror(errnoval) : "");
490 #define diewrap(fn, pfx, sysloglevel, err, estatus) \
491 static void fn(const char *fmt, ...) \
492 __attribute__((__noreturn__,__format__(printf,1,2))); \
493 static void fn(const char *fmt, ...) { \
496 logv(sysloglevel, pfx, err, fmt, al); \
500 #define logwrap(fn, pfx, sysloglevel, err) \
501 static void fn(const char *fmt, ...) \
502 __attribute__((__format__(printf,1,2))); \
503 static void fn(const char *fmt, ...) { \
506 logv(sysloglevel, pfx, err, fmt, al); \
510 diewrap(sysdie, " critical", LOG_CRIT, errno, 16);
511 diewrap(die, " critical", LOG_CRIT, -1, 16);
513 diewrap(sysfatal, " fatal", LOG_ERR, errno, 12);
514 diewrap(fatal, " fatal", LOG_ERR, -1, 12);
516 logwrap(syswarn, " warning", LOG_WARNING, errno);
517 logwrap(warn, " warning", LOG_WARNING, -1);
519 logwrap(notice, "", LOG_NOTICE, -1);
520 logwrap(info, " info", LOG_INFO, -1);
521 logwrap(debug, " debug", LOG_DEBUG, -1);
524 /*========== utility functions etc. ==========*/
526 static char *xvasprintf(const char *fmt, va_list al)
527 __attribute__((__format__(printf,1,0)));
528 static char *xvasprintf(const char *fmt, va_list al) {
530 int rc= vasprintf(&str,fmt,al);
531 if (rc<0) sysdie("vasprintf(\"%s\",...) failed", fmt);
534 static char *xasprintf(const char *fmt, ...)
535 __attribute__((__format__(printf,1,2)));
536 static char *xasprintf(const char *fmt, ...) {
539 char *str= xvasprintf(fmt,al);
544 static void perhaps_close(int *fd) { if (*fd) { close(*fd); fd=0; } }
546 static pid_t xfork(const char *what) {
550 if (child==-1) sysdie("cannot fork for %s",what);
551 if (!child) postfork(what);
552 debug("forked %s %ld", what, (unsigned long)child);
556 static void on_fd_read_except(int fd, oop_call_fd callback) {
557 loop->on_fd(loop, fd, OOP_READ, callback, 0);
558 loop->on_fd(loop, fd, OOP_EXCEPTION, callback, 0);
560 static void cancel_fd_read_except(int fd) {
561 loop->cancel_fd(loop, fd, OOP_READ);
562 loop->cancel_fd(loop, fd, OOP_EXCEPTION);
565 static void report_child_status(const char *what, int status) {
566 if (WIFEXITED(status)) {
567 int es= WEXITSTATUS(status);
569 warn("%s: child died with error exit status %d",es);
570 } else if (WIFSIGNALED(status)) {
571 int sig= WTERMSIG(status);
572 const char *sigstr= strsignal(sig);
573 const char *coredump= WCOREDUMP(status) ? " (core dumped)" : "";
575 warn("%s: child died due to fatal signal %s%s", what, sigstr, coredump);
577 warn("%s: child died due to unknown fatal signal %d%s",
578 what, sig, coredump);
580 warn("%s: child died with unknown wait status %d", status);
584 static int xwaitpid(pid_t *pid, const char *what) {
587 int r= kill(*pid, SIGKILL);
588 if (r) sysdie("cannot kill %s child", what);
590 pid_t got= waitpid(*pid, &status, WNOHANG);
591 if (got==-1) sysdie("cannot reap %s child", what);
598 static void xunlink(const char *path, const char *what) {
600 if (r) sysdie("can't unlink %s %s", path, what);
603 static time_t xtime(void) {
605 if (now==-1) sysdie("time(2) failed");
608 static void check_isreg(const struct stat *stab, const char *path,
610 if (!S_ISREG(stab->st_mode))
611 die("%s %s not a plain file (mode 0%lo)",
612 what, path, (unsigned long)stab->st_mode);
615 static void xfstat(int fd, struct stat *stab_r, const char *what) {
616 int r= fstat(fd, stab_r);
617 if (r) sysdie("could not fstat %s", what);
620 static void xfstat_isreg(int fd, struct stat *stab_r,
621 const char *path, const char *what) {
622 xfstat(fd, stab_r, what);
623 check_isreg(stab_r, path, what);
626 static void xlstat_isreg(const char *path, struct stat *stab,
627 int *enoent_r /* 0 means ENOENT is fatal */,
629 int r= lstat(path, stab);
631 if (errno==ENOENT && enoent_r) { *enoent_r=1; return; }
632 sysdie("could not lstat %s %s", what, path);
634 if (enoent_r) *enoent_r= 0;
635 check_isreg(stab, path, what);
638 static void setnonblock(int fd, int nonblocking) {
639 int r= fcntl(fd, F_GETFL); if (r<0) sysdie("setnonblocking fcntl F_GETFL");
640 if (nonblocking) r |= O_NONBLOCK;
641 else r &= ~O_NONBLOCK;
642 r= fcntl(fd, F_SETFL, r); if (r<0) sysdie("setnonblocking fcntl F_SETFL");
645 static int samefile(const struct stat *a, const struct stat *b) {
646 assert(S_ISREG(a->st_mode));
647 assert(S_ISREG(b->st_mode));
648 return (a->st_ino == b->st_ino &&
649 a->st_dev == b->st_dev);
652 static char *sanitise(const char *input) {
653 static char sanibuf[100]; /* returns pointer to this buffer! */
655 const char *p= input;
659 if (q > sanibuf+sizeof(sanibuf)-8) { strcpy(q,"'.."); break; }
661 if (!c) { *q++= '\''; *q=0; break; }
662 if (c>=' ' && c<=126 && c!='\\') { *q++= c; continue; }
663 sprintf(q,"\\x%02x",c);
669 /*========== making new connections ==========*/
671 static void conn_dispose(Conn *conn) {
673 perhaps_close(&conn->fd);
675 until_connect= reconnect_delay_periods;
678 static int connecting_sockets[2]= {-1,-1};
679 static pid_t connecting_child;
681 static void connect_attempt_discard(void) {
682 if (connecting_sockets[0])
683 cancel_fd_read_except(connecting_sockets[0]);
685 perhaps_close(&connecting_sockets[0]);
686 perhaps_close(&connecting_sockets[1]);
688 if (connecting_child) {
689 int r= kill(connecting_child, SIGTERM);
690 if (r) syswarn("failed to kill connecting child");
691 int status= xwaitpid(&connecting_child, "connect");
693 if (!(WIFEXITED(status) ||
694 (WIFSIGNALED(status) && WTERMSIG(status) == SIGKILL)))
695 report_child_status("connect", status);
699 #define PREP_DECL_MSG_CMSG(msg) \
701 memset(&msg,0,sizeof(msg)); \
702 char msg##cbuf[CMSG_SPACE(sizeof(fd))]; \
703 msg.msg_control= msg##cbuf; \
704 msg.msg_controllen= sizeof(msg##cbuf);
706 static void *connchild_event(oop_source *lp, int fd, oop_event e, void *u) {
709 conn= xmalloc(sizeof(*conn));
710 memset(conn,0,sizeof(*conn));
712 PREP_DECL_MSG_CMSG(msg);
713 struct cmsghdr *h= 0;
714 ssize_t rs= recvmsg(fd, &msg, MSG_DONTWAIT);
715 if (rs >= 0) h= CMSG_FIRSTHDR(&msg);
718 pid_t got= waitpid(connecting_child, &status, WNOHANG);
720 assert(got==connecting_child);
722 if (WIFEXITED(status) &&
723 (WEXITSTATUS(status) != 0 &&
724 WEXITSTATUS(status) != CONNCHILD_ESTATUS_STREAM &&
725 WEXITSTATUS(status) != CONNCHILD_ESTATUS_NOSTREAM)) {
726 /* child already reported the problem */
727 } else if (WIFSIGNALED(status) && WTERMSIG(status) == SIGALRM) {
728 warn("connect: connection attempt timed out");
729 } else if (!WIFEXITED(status)) {
730 report_child_status("connect", status);
731 /* that's probably the root cause then */
734 /* child is still running apparently, report the socket problem */
736 syswarn("connect: read from child socket failed");
737 else if (e == OOP_EXCEPTION)
738 warn("connect: unexpected exception on child socket");
740 warn("connect: unexpected EOF on child socket");
745 #define CHK(field, val) \
746 if (h->cmsg_##field != val) { \
747 die("connect: child sent cmsg with cmsg_" #field "=%d, expected %d"); \
750 CHK(level, SOL_SOCKET);
751 CHK(type, SCM_RIGHTS);
752 CHK(len, CMSG_LEN(sizeof(conn->fd)));
755 if (CMSG_NXTHDR(&msg,h)) { die("connect: child sent many cmsgs"); goto x; }
757 memcpy(&conn->fd, CMSG_DATA(h), sizeof(conn->fd));
760 pid_t got= waitpid(connecting_child, &status, 0);
761 if (got==-1) sysdie("connect: real wait for child");
762 assert(got == connecting_child);
765 if (!WIFEXITED(status)) { report_child_status("connect",status); goto x; }
766 int es= WEXITSTATUS(status);
768 case CONNCHILD_ESTATUS_STREAM: conn->stream= 1; break;
769 case CONNCHILD_ESTATUS_NOSTREAM: conn->stream= 0; break;
771 fatal("connect: child gave unexpected exit status %d", es);
775 setnonblock(conn->fd, 1);
776 conn->max_queue= conn->stream ? max_queue_per_conn : 1;
777 LIST_ADDHEAD(conns, conn);
778 notice("C%d connected %s", conn->fd, conn->stream ? "streaming" : "plain");
779 connect_attempt_discard();
780 check_master_queue();
785 connect_attempt_discard();
788 static int allow_connect_start(void) {
789 return conns.count < max_connections
794 static void connect_start(void) {
795 assert(!connecting_sockets[0]);
796 assert(!connecting_sockets[1]);
797 assert(!connecting_child);
799 notice("starting connection attempt");
801 int r= socketpair(AF_UNIX, SOCK_STREAM, 0, connecting_sockets);
802 if (r) { syswarn("connect: cannot create socketpair for child"); goto x; }
804 connecting_child= xfork("connection");
806 if (!connecting_child) {
807 FILE *cn_from, *cn_to;
808 char buf[NNTP_STRLEN+100];
809 int exitstatus= CONNCHILD_ESTATUS_NOSTREAM;
811 r= close(connecting_sockets[0]);
812 if (r) sysdie("connect: close parent socket in child");
814 alarm(connection_setup_timeout);
815 if (NNTPconnect((char*)remote_host, port, &cn_from, &cn_to, buf) < 0) {
816 if (buf[0]) fatal("connect: rejected: %s", sanitise(buf));
817 else sysfatal("connect: connection attempt failed");
819 if (NNTPsendpassword((char*)remote_host, cn_from, cn_to) < 0)
820 sysfatal("connect: authentication failed");
822 if (fputs("MODE STREAM\r\n", cn_to) ||
824 sysfatal("connect: could not send MODE STREAM");
825 buf[sizeof(buf)-1]= 0;
826 if (!fgets(buf, sizeof(buf)-1, cn_from)) {
828 sysfatal("connect: could not read response to MODE STREAM");
830 fatal("connect: connection close in response to MODE STREAM");
835 fatal("connect: response to MODE STREAM is too long: %.100s...",
836 remote_host, sanitise(buf));
837 l--; if (l>0 && buf[l-1]=='\r') l--;
840 int rcode= strtoul(buf,&ep,10);
842 fatal("connect: bad response to MODE STREAM: %.50s", sanitise(buf));
846 exitstatus= CONNCHILD_ESTATUS_STREAM;
852 warn("connect: unexpected response to MODE STREAM: %.50s",
858 int fd= fileno(cn_from);
860 PREP_DECL_MSG_CMSG(msg);
861 struct cmsghdr *cmsg= CMSG_FIRSTHDR(&msg);
862 cmsg->cmsg_level= SOL_SOCKET;
863 cmsg->cmsg_type= SCM_RIGHTS;
864 cmsg->cmsg_len= CMSG_LEN(sizeof(fd));
865 memcpy(CMSG_DATA(cmsg), &fd, sizeof(fd));
867 msg.msg_controllen= cmsg->cmsg_len;
868 r= sendmsg(connecting_sockets[1], &msg, 0);
869 if (r) sysdie("sendmsg failed for new connection");
874 r= close(connecting_sockets[1]); connecting_sockets[1]= 0;
875 if (r) sysdie("connect: close child socket in parent");
877 on_fd_read_except(connecting_sockets[0], connchild_event);
881 connect_attempt_discard();
885 /*========== overall control of article flow ==========*/
887 static void check_master_queue(void) {
895 /* Find a connection to offer this article. We prefer a busy
896 * connection to an idle one, provided it's not full. We take the
897 * first (oldest) and since that's stable, it will mean we fill up
898 * connections in order. That way if we have too many
899 * connections, the spare ones will go away eventually.
901 for (walk=LIST_HEAD(conns); walk; walk=LIST_NEXT(walk)) {
902 int inqueue= walk->sent.count + walk->priority.count
903 + walk->waiting.count;
904 spare= walk->max_queue - inqueue;
905 assert(inqueue <= max_queue_per_conn);
907 if (inqueue==0) /*idle*/ { if (!use) use= walk; }
908 else if (spare>0) /*working*/ { use= walk; break; }
912 Article *art= LIST_REMHEAD(queue);
913 LIST_ADDTAIL(use->waiting, art);
916 conn_maybe_write(use);
917 } else if (allow_connect_start()) {
918 until_connect= reconnect_delay_periods;
927 static void *conn_writeable(oop_source *l, int fd, oop_event ev, void *u) {
932 static void conn_maybe_write(Conn *conn) {
935 conn_make_some_xmits(conn);
937 loop->cancel_fd(loop, conn->fd, OOP_WRITE);
941 void *rp= conn_write_some_xmits(conn);
942 if (rp==OOP_CONTINUE) {
943 loop->on_fd(loop, conn->fd, OOP_WRITE, conn_writeable, conn);
945 } else if (rp==OOP_HALT) {
948 /* transmitted everything */
955 static void vconnfail(Conn *conn, const char *fmt, va_list al)
956 __attribute__((__format__(printf,2,0)));
958 static void vconnfail(Conn *conn, const char *fmt, va_list al) {
959 int requeue[art_MaxState];
962 while ((art= LIST_REMHEAD(conn->priority))) LIST_ADDTAIL(queue, art);
963 while ((art= LIST_REMHEAD(conn->waiting))) LIST_ADDTAIL(queue, art);
964 while ((art= LIST_REMHEAD(conn->sent))) {
965 requeue[art->state]++;
966 if (art->state==art_Unsolicited) art->state= art_Unchecked;
967 LIST_ADDTAIL(queue,art);
972 for (i=0, d=conn->xmitd; i<conn->xmitu; i++, d++)
975 char *m= xvasprintf(fmt,al);
976 warn("C%d connection failed (requeueing " RCI_TRIPLE_FMT_BASE "): %s",
977 conn->fd, RCI_TRIPLE_VALS_BASE(requeue, /*nothing*/), m);
980 LIST_REMOVE(conns,conn);
982 check_master_queue();
985 static void connfail(Conn *conn, const char *fmt, ...)
986 __attribute__((__format__(printf,2,3)));
987 static void connfail(Conn *conn, const char *fmt, ...) {
990 vconnfail(conn,fmt,al);
994 /*========== article transmission ==========*/
996 static XmitDetails *xmit_core(Conn *conn, const char *data, int len,
997 XmitKind kind) { /* caller must then fill in details */
998 struct iovec *v= &conn->xmit[conn->xmitu];
999 XmitDetails *d= &conn->xmitd[conn->xmitu++];
1000 v->iov_base= (char*)data;
1006 static void xmit_noalloc(Conn *conn, const char *data, int len) {
1007 xmit_core(conn,data,len, xk_Const);
1009 #define XMIT_LITERAL(lit) (xmit_noalloc(conn, (lit), sizeof(lit)-1))
1011 static void xmit_artbody(Conn *conn, ARTHANDLE *ah /* consumed */) {
1012 XmitDetails *d= xmit_core(conn, ah->data, ah->len, xk_Artdata);
1016 static void xmit_free(XmitDetails *d) {
1018 case xk_Malloc: free(d->info.malloc_tofree); break;
1019 case xk_Artdata: SMfreearticle(d->info.sm_art); break;
1020 case xk_Const: break;
1025 static void *conn_write_some_xmits(Conn *conn) {
1027 * 0: nothing more to write, no need to call us again
1028 * OOP_CONTINUE: more to write but fd not writeable
1029 * OOP_HALT: disaster, have destroyed conn
1032 int count= conn->xmitu;
1033 if (!count) return 0;
1035 if (count > IOV_MAX) count= IOV_MAX;
1036 ssize_t rs= writev(conn->fd, conn->xmit, count);
1038 if (errno == EAGAIN) return OOP_CONTINUE;
1039 connfail(conn, "write failed: %s", strerror(errno));
1045 for (done=0; rs && done<conn->xmitu; done++) {
1046 struct iovec *vp= &conn->xmit[done];
1047 XmitDetails *dp= &conn->xmitd[done];
1048 if (rs > vp->iov_len) {
1056 int newu= conn->xmitu - done;
1057 memmove(conn->xmit, conn->xmit + done, newu * sizeof(*conn->xmit));
1058 memmove(conn->xmitd, conn->xmitd + done, newu * sizeof(*conn->xmitd));
1063 static void conn_make_some_xmits(Conn *conn) {
1065 if (conn->xmitu+5 > CONNIOVS)
1068 Article *art= LIST_REMHEAD(conn->priority);
1069 if (!art) art= LIST_REMHEAD(conn->waiting);
1072 if (art->state >= art_Wanted || (conn->stream && nocheck)) {
1073 /* actually send it */
1075 ARTHANDLE *artdata= SMretrieve(art->token, RETR_ALL);
1079 XMIT_LITERAL("TAKETHIS ");
1080 xmit_noalloc(conn, art->messageid, art->midlen);
1081 XMIT_LITERAL("\r\n");
1082 xmit_artbody(conn, artdata);
1085 /* we got 235 from IHAVE */
1087 xmit_artbody(conn, artdata);
1089 XMIT_LITERAL(".\r\n");
1094 art->state == art_Unchecked ? art_Unsolicited :
1095 art->state == art_Wanted ? art_Wanted :
1097 art->ipf->counts[art->state][RC_sent]++;
1098 LIST_ADDTAIL(conn->sent, art);
1104 XMIT_LITERAL("IHAVE ");
1106 XMIT_LITERAL("CHECK ");
1107 xmit_noalloc(conn, art->messageid, art->midlen);
1108 XMIT_LITERAL("\r\n");
1110 assert(art->state == art_Unchecked);
1111 art->ipf->counts[art->state][RC_sent]++;
1112 LIST_ADDTAIL(conn->sent, art);
1118 /*========== handling responses from peer ==========*/
1120 static const oop_rd_style peer_rd_style= {
1121 OOP_RD_DELIM_STRIP, '\n',
1123 OOP_RD_SHORTREC_FORBID
1126 static void *peer_rd_err(oop_source *lp, oop_read *oread, oop_event ev,
1127 const char *errmsg, int errnoval,
1128 const char *data, size_t recsz, void *conn_v) {
1130 connfail(conn, "error receiving from peer: %s", errmsg);
1131 return OOP_CONTINUE;
1134 static Article *article_reply_check(Conn *conn, const char *response,
1135 int code_indicates_streaming,
1137 /* 1:yes, -1:no, 0:dontcare */,
1138 const char *sanitised_response) {
1139 Article *art= LIST_HEAD(conn->sent);
1143 "peer gave unexpected response when no commands outstanding: %s",
1144 sanitised_response);
1148 if (code_indicates_streaming) {
1149 assert(!memchr(response, 0, 4)); /* ensured by peer_rd_ok */
1150 if (!conn->stream) {
1151 connfail(conn, "peer gave streaming response code "
1152 " to IHAVE or subsequent body: %s", sanitised_response);
1155 const char *got_mid= response+4;
1156 int got_midlen= strcspn(got_mid, " \n\r");
1157 if (got_midlen<3 || got_mid[0]!='<' || got_mid[got_midlen-1]!='>') {
1158 connfail(conn, "peer gave streaming response with syntactically invalid"
1159 " messageid: %s", sanitised_response);
1162 if (got_midlen != art->midlen ||
1163 memcmp(got_mid, art->messageid, got_midlen)) {
1164 connfail(conn, "peer gave streaming response code to wrong article -"
1165 " probable synchronisation problem; we offered: %s;"
1167 art->messageid, sanitised_response);
1172 connfail(conn, "peer gave non-streaming response code to"
1173 " CHECK/TAKETHIS: %s", sanitised_response);
1178 if (must_have_sent>0 && art->state < art_Wanted) {
1179 connfail(conn, "peer says article accepted but"
1180 " we had not sent the body: %s", sanitised_response);
1183 if (must_have_sent<0 && art->state >= art_Wanted) {
1184 connfail(conn, "peer says please sent the article but we just did: %s",
1185 sanitised_response);
1189 Article *art_again= LIST_REMHEAD(conn->sent);
1190 assert(art_again == art);
1194 static void update_nocheck(int accepted) {
1195 accept_proportion *= nocheck_decay;
1196 accept_proportion += accepted * (1.0 - nocheck_decay);
1197 int new_nocheck= accept_proportion >= nocheck_thresh;
1198 if (new_nocheck && !nocheck_reported) {
1199 notice("entering nocheck mode for the first time");
1200 nocheck_reported= 1;
1201 } else if (new_nocheck != nocheck) {
1202 debug("nocheck mode %s", new_nocheck ? "start" : "stop");
1204 nocheck= new_nocheck;
1207 static void article_done(Conn *conn, Article *art, int whichcount) {
1208 art->ipf->counts[art->state][whichcount]++;
1209 if (whichcount == RC_accepted) update_nocheck(1);
1210 else if (whichcount == RC_unwanted) update_nocheck(0);
1212 InputFile *ipf= art->ipf;
1213 while (art->blanklen) {
1214 static const char spaces[]=
1219 int w= art->blanklen; if (w >= sizeof(spaces)) w= sizeof(spaces)-1;
1220 int r= pwrite(ipf->fd, spaces, w, art->offset);
1222 if (errno==EINTR) continue;
1223 sysdie("failed to blank entry for %s (length %d at offset %lu) in %s",
1224 art->messageid, art->blanklen, art->offset, ipf->path);
1226 assert(r>=0 && r<=w);
1232 assert(ipf->inprogress >= 0);
1234 if (!ipf->inprogress && ipf != main_input_file)
1235 queue_check_input_done();
1240 static void *peer_rd_ok(oop_source *lp, oop_read *oread, oop_event ev,
1241 const char *errmsg, int errnoval,
1242 const char *data, size_t recsz, void *conn_v) {
1245 if (ev == OOP_RD_EOF) {
1246 connfail(conn, "unexpected EOF from peer");
1247 return OOP_CONTINUE;
1249 assert(ev == OOP_RD_OK);
1251 char *sani= sanitise(data);
1254 unsigned long code= strtoul(data, &ep, 10);
1255 if (ep != data+3 || *ep != ' ' || data[0]=='0') {
1256 connfail(conn, "badly formatted response from peer: %s", sani);
1257 return OOP_CONTINUE;
1260 if (conn->quitting) {
1261 if (code!=205 && code!=503) {
1262 connfail(conn, "peer gave unexpected response to QUIT: %s", sani);
1264 notice("C%d idle connection closed\n");
1265 assert(!conn->waiting.count);
1266 assert(!conn->priority.count);
1267 assert(!conn->sent.count);
1268 assert(!conn->xmitu);
1269 LIST_REMOVE(conns,conn);
1272 return OOP_CONTINUE;
1277 #define GET_ARTICLE(musthavesent) \
1278 art= article_reply_check(conn, data, musthavesent, code_streaming, sani); \
1279 if (art) ; else return OOP_CONTINUE /* reply_check has failed the conn */
1281 #define ARTICLE_DEALTWITH(streaming,musthavesent,how) \
1282 code_streaming= (streaming); \
1283 GET_ARTICLE(musthavesent); \
1284 article_done(conn, art, RC_##how); break;
1286 #define PEERBADMSG(m) connfail(conn, m ": %s", sani); return OOP_CONTINUE
1288 int code_streaming= 0;
1292 case 400: PEERBADMSG("peer stopped accepting articles");
1293 case 503: PEERBADMSG("peer timed us out");
1294 default: PEERBADMSG("peer sent unexpected message");
1296 case 435: ARTICLE_DEALTWITH(0,0,unwanted); /* IHAVE says they have it */
1297 case 438: ARTICLE_DEALTWITH(1,0,unwanted); /* CHECK/TAKETHIS: they have it */
1299 case 235: ARTICLE_DEALTWITH(0,1,accepted); /* IHAVE says thanks */
1300 case 239: ARTICLE_DEALTWITH(1,1,accepted); /* TAKETHIS says thanks */
1302 case 437: ARTICLE_DEALTWITH(0,0,rejected); /* IHAVE says rejected */
1303 case 439: ARTICLE_DEALTWITH(1,0,rejected); /* TAKETHIS says rejected */
1305 case 238: /* CHECK says send it */
1307 case 335: /* IHAVE says send it */
1309 assert(art->state == art_Unchecked);
1310 art->ipf->counts[art->state][RC_accepted]++;
1311 art->state= art_Wanted;
1312 LIST_ADDTAIL(conn->priority, art);
1315 case 431: /* CHECK or TAKETHIS says try later */
1317 case 436: /* IHAVE says try later */
1320 if (fprintf(defer, "%s %s\n", TokenToText(art->token), art->messageid) <0
1322 sysfatal("write to defer file %s",path_defer);
1323 article_done(conn, art, RC_deferred);
1328 conn_maybe_write(conn);
1329 check_master_queue();
1330 return OOP_CONTINUE;
1334 /*========== monitoring of input files ==========*/
1336 static void feedfile_eof(InputFile *ipf) {
1337 assert(ipf != main_input_file); /* promised by tailing_try_read */
1339 inputfile_tailing_stop(ipf);
1340 assert(ipf->fd >= 0);
1341 if (close(ipf->fd)) sysdie("could not close input file %s", ipf->path);
1344 if (ipf == flushing_input_file) {
1345 assert(sms==sm_SEPARATED || sms==sm_DROPPING);
1346 if (main_input_file) inputfile_tailing_start(main_input_file);
1347 statemc_check_flushing_done();
1348 } else if (ipf == backlog_input_file) {
1349 statemc_check_backlog_done();
1351 abort(); /* supposed to wait rather than get EOF on main input file */
1355 static InputFile *open_input_file(const char *path) {
1356 int fd= open(path, O_RDONLY);
1358 if (errno==ENOENT) return 0;
1359 sysfatal("unable to open input file %s", path);
1362 InputFile *ipf= xmalloc(sizeof(*ipf) + strlen(path) + 1);
1363 memset(ipf,0,sizeof(*ipf));
1366 strcpy(ipf->path, path);
1371 static void close_input_file(InputFile *ipf) {
1372 assert(!ipf->readable_callback); /* must have had ->on_cancel */
1373 assert(!ipf->filemon); /* must have had inputfile_tailing_stop */
1374 assert(!ipf->rd); /* must have had inputfile_tailing_stop */
1375 assert(!ipf->inprogress); /* no dangling pointers pointing here */
1378 if (close(ipf->fd)) sysdie("could not close input file %s", ipf->path);
1382 /*---------- dealing with articles read in the input file ----------*/
1384 static void *feedfile_got_bad_data(InputFile *ipf, off_t offset,
1385 const char *data, const char *how) {
1386 warn("corrupted file: %s, offset %lu: %s: %s",
1387 ipf->path, (unsigned long)offset, how, sanitise(data));
1388 ipf->readcount_err++;
1389 if (ipf->readcount_err > max_bad_data_initial +
1390 (ipf->readcount_ok+ipf->readcount_blank) / max_bad_data_ratio)
1391 die("too much garbage in input file! (%d errs, %d ok, %d blank)",
1392 ipf->readcount_err, ipf->readcount_ok, ipf->readcount_blank);
1393 return OOP_CONTINUE;
1396 static void *feedfile_read_err(oop_source *lp, oop_read *rd,
1397 oop_rd_event ev, const char *errmsg,
1398 int errnoval, const char *data, size_t recsz,
1400 InputFile *ipf= ipf_v;
1401 assert(ev == OOP_RD_SYSTEM);
1403 sysdie("error reading input file: %s, offset %lu",
1404 ipf->path, (unsigned long)ipf->offset);
1407 static void *feedfile_got_article(oop_source *lp, oop_read *rd,
1408 oop_rd_event ev, const char *errmsg,
1409 int errnoval, const char *data, size_t recsz,
1411 InputFile *ipf= ipf_v;
1413 char tokentextbuf[sizeof(TOKEN)*2+3];
1415 if (!data) { feedfile_eof(ipf); return OOP_CONTINUE; }
1417 off_t old_offset= ipf->offset;
1418 ipf->offset += recsz + 1;
1420 #define X_BAD_DATA(m) return feedfile_got_bad_data(ipf,old_offset,data,m);
1422 if (ev==OOP_RD_PARTREC)
1423 feedfile_got_bad_data(ipf,old_offset,data,"missing final newline");
1424 /* but process it anyway */
1426 if (ipf->skippinglong) {
1427 if (ev==OOP_RD_OK) ipf->skippinglong= 0; /* fine now */
1430 if (ev==OOP_RD_LONG) {
1431 ipf->skippinglong= 1;
1432 X_BAD_DATA("overly long line");
1435 if (memchr(data,'\0',recsz)) X_BAD_DATA("nul byte");
1436 if (!recsz) X_BAD_DATA("empty line");
1439 if (strspn(data," ") != recsz) X_BAD_DATA("line partially blanked");
1440 ipf->readcount_blank++;
1441 return OOP_CONTINUE;
1444 char *space= strchr(data,' ');
1445 int tokenlen= space-data;
1446 int midlen= (int)recsz-tokenlen-1;
1447 if (midlen <= 2) X_BAD_DATA("no room for messageid");
1448 if (space[1]!='<' || space[midlen]!='>') X_BAD_DATA("invalid messageid");
1450 if (tokenlen != sizeof(TOKEN)*2+2) X_BAD_DATA("token wrong length");
1451 memcpy(tokentextbuf, data, tokenlen);
1452 tokentextbuf[tokenlen]= 0;
1453 if (!IsToken(tokentextbuf)) X_BAD_DATA("token wrong syntax");
1455 ipf->readcount_ok++;
1457 art= xmalloc(sizeof(*art) - 1 + midlen + 1);
1458 art->offset= ipf->offset;
1459 art->blanklen= recsz;
1460 art->midlen= midlen;
1461 art->state= art_Unchecked;
1462 art->ipf= ipf; ipf->inprogress++;
1463 art->token= TextToToken(tokentextbuf);
1464 strcpy(art->messageid, space+1);
1465 LIST_ADDTAIL(queue, art);
1467 if (sms==sm_NORMAL && ipf==main_input_file &&
1468 ipf->offset >= target_max_feedfile_size)
1469 statemc_start_flush("feed file size");
1471 check_master_queue();
1472 return OOP_CONTINUE;
1475 /*========== tailing input file ==========*/
1477 static void *tailing_rable_call_time(oop_source *loop, struct timeval tv,
1479 InputFile *ipf= user;
1480 return ipf->readable_callback(loop, &ipf->readable,
1481 ipf->readable_callback_user);
1484 static void tailing_on_cancel(struct oop_readable *rable) {
1485 InputFile *ipf= (void*)rable;
1487 if (ipf->filemon) filemon_stop(ipf);
1488 loop->cancel_time(loop, OOP_TIME_NOW, tailing_rable_call_time, ipf);
1489 ipf->readable_callback= 0;
1492 static void tailing_queue_readable(InputFile *ipf) {
1493 /* lifetime of ipf here is OK because destruction will cause
1494 * on_cancel which will cancel this callback */
1495 loop->on_time(loop, OOP_TIME_NOW, tailing_rable_call_time, ipf);
1498 static int tailing_on_readable(struct oop_readable *rable,
1499 oop_readable_call *cb, void *user) {
1500 InputFile *ipf= (void*)rable;
1502 tailing_on_cancel(rable);
1503 ipf->readable_callback= cb;
1504 ipf->readable_callback_user= user;
1507 tailing_queue_readable(ipf);
1511 static ssize_t tailing_try_read(struct oop_readable *rable, void *buffer,
1513 InputFile *ipf= (void*)rable;
1515 ssize_t r= read(ipf->fd, buffer, length);
1517 if (errno==EINTR) continue;
1521 if (ipf==main_input_file) {
1524 } else if (ipf==flushing_input_file) {
1526 assert(sms==sm_SEPARATED || sms==sm_DROPPING);
1527 } else if (ipf==backlog_input_file) {
1537 /*---------- filemon implemented with inotify ----------*/
1539 #if defined(HAVE_INOTIFY) && !defined(HAVE_FILEMON)
1540 #define HAVE_FILEMON
1542 #include <linux/inotify.h>
1544 static int filemon_inotify_fd;
1545 static int filemon_inotify_wdmax;
1546 static InputFile **filemon_inotify_wd2ipf;
1548 struct Filemon_Perfile {
1552 static void filemon_method_startfile(InputFile *ipf, Filemon_Perfile *pf) {
1553 int wd= inotify_add_watch(filemon_inotify_fd, ipf->path, IN_MODIFY);
1554 if (wd < 0) sysdie("inotify_add_watch %s", ipf->path);
1556 if (wd >= filemon_inotify_wdmax) {
1558 filemon_inotify_wd= xrealloc(filemon_inotify_wd2ipf,
1559 sizeof(*filemon_inotify_wd2ipf) * newmax);
1560 memset(filemon_inotify_wd2ipf + filemon_inotify_wdmax, 0,
1561 sizeof(*filemon_inotify_wd2ipf) * (newmax - filemon_inotify_wdmax));
1562 filemon_inotify_wdmax= newmax;
1565 assert(!filemon_inotify_wd2ipf[wd]);
1566 filemon_inotify_wd2ipf[wd]= ipf;
1568 debug("filemon inotify startfile %p wd=%d wdmax=%d",
1569 ipf, wd, filemon_inotify_wdmax);
1574 static void filemon_method_stopfile(InputFile *ipf, Filemon_Perfile *pf) {
1576 debug("filemon inotify stopfile %p wd=%d", ipf, wd);
1577 int r= inotify_rm_watch(filemon_inotify_fd, filemon_inotify_wd);
1578 if (r) sysdie("inotify_rm_watch");
1579 filemon_inotify_wd2ipf[wd]= 0;
1582 static void *filemon_inotify_readable(oop_source *lp, int fd,
1583 oop_event e, void *u) {
1584 struct inotify_event iev;
1586 int r= read(filemon_inotify_fd, &iev, sizeof(iev));
1588 if (errno==EAGAIN) break;
1589 sysdie("read from inotify master");
1590 } else if (r==sizeof(iev)) {
1591 assert(iev.wd >= 0 && iev.wd < filemon_inotify_wdmax);
1593 die("inotify read %d bytes wanted struct of %d", r, (int)sizeof(iev));
1595 InputFile *ipf= filemon_inotify_wd2ipf[iev.wd];
1596 debug("filemon inotify readable read %p wd=%p", iev.wd, ipf);
1597 filemon_callback(ipf);
1599 return OOP_CONTINUE;
1602 static int filemon_method_init(void) {
1603 filemon_inotify_fd= inotify_init();
1604 if (filemon_inotify_fd<0) {
1605 syswarn("could not initialise inotify: inotify_init failed");
1609 loop->on_fd(loop, filemon_inotify_fd, OOP_READ, filemon_inotify_readable);
1611 debug("filemon inotify init filemon_inotify_fd=%d", filemon_inotify_fd);
1615 #endif /* HAVE_INOTIFY && !HAVE_FILEMON */
1617 /*---------- filemon dummy implementation ----------*/
1619 #if !defined(HAVE_FILEMON)
1621 struct Filemon_Perfile { int dummy; };
1623 static int filemon_method_init(void) { return 0; }
1624 static void filemon_method_startfile(InputFile *ipf, Filemon_Perfile *pf) { }
1625 static void filemon_method_stopfile(InputFile *ipf, Filemon_Perfile *pf) { }
1627 #endif /* !HAVE_FILEMON */
1629 /*---------- filemon generic interface ----------*/
1631 static void filemon_start(InputFile *ipf) {
1632 assert(!ipf->filemon);
1634 ipf->filemon= xmalloc(sizeof(*ipf->filemon));
1635 memset(ipf->filemon, 0, sizeof(*ipf->filemon));
1636 filemon_method_startfile(ipf, ipf->filemon);
1639 static void filemon_stop(InputFile *ipf) {
1640 if (!ipf->filemon) return;
1641 filemon_method_stopfile(ipf, ipf->filemon);
1646 static void filemon_callback(InputFile *ipf) {
1647 ipf->readable_callback(loop, &ipf->readable, ipf->readable_callback_user);
1650 /*---------- interface to start and stop an input file ----------*/
1652 static const oop_rd_style feedfile_rdstyle= {
1653 OOP_RD_DELIM_STRIP, '\n',
1655 OOP_RD_SHORTREC_LONG,
1658 static void inputfile_tailing_start(InputFile *ipf) {
1660 ipf->readable.on_readable= tailing_on_readable;
1661 ipf->readable.on_cancel= tailing_on_cancel;
1662 ipf->readable.try_read= tailing_try_read;
1663 ipf->readable.delete_tidy= 0; /* we never call oop_rd_delete_{tidy,kill} */
1664 ipf->readable.delete_kill= 0;
1666 ipf->readable_callback= 0;
1667 ipf->readable_callback_user= 0;
1669 ipf->rd= oop_rd_new(loop, &ipf->readable, 0,0);
1672 int r= oop_rd_read(ipf->rd, &feedfile_rdstyle, MAX_LINE_FEEDFILE,
1673 feedfile_got_article,ipf, feedfile_read_err, ipf);
1674 if (r) sysdie("unable start reading feedfile %s",ipf->path);
1677 static void inputfile_tailing_stop(InputFile *ipf) {
1679 oop_rd_cancel(ipf->rd);
1680 oop_rd_delete(ipf->rd);
1682 assert(!ipf->filemon); /* we shouldn't be monitoring it now */
1686 /*========== interaction with innd - state machine ==========*/
1688 /* See official state diagram at top of file. We implement
1699 |`---------------------------------------------------.
1701 |`---------------- - - - |
1702 D ENOENT | D EXISTS see OVERALL STATES diagram |
1703 | for full startup logic |
1706 | ============ try to |
1712 | | F IS SO BIG WE SHOULD FLUSH, OR TIMEOUT |
1713 ^ | hardlink F to D |
1716 | | our handle onto F is now onto D |
1719 | |<-------------------<---------------------<---------+
1721 | | spawn inndcomm flush |
1723 | ================== |
1724 | FLUSHING[-ABSENT] |
1726 | main D tail/none |
1727 | ================== |
1729 | | INNDCOMM FLUSH FAILS ^
1730 | |`----------------------->----------. |
1732 | | NO SUCH SITE V |
1733 ^ |`--------------->----. ==================== |
1734 | | \ FLUSHFAILED[-ABSENT] |
1736 | | FLUSH OK \ main D tail/none |
1737 | | open F \ ==================== |
1739 | | \ | TIME TO RETRY |
1740 | |`------->----. ,---<---'\ `----------------'
1741 | | D NONE | | D NONE `----.
1743 | ============= V V ============
1744 | SEPARATED-1 | | DROPPING-1
1745 | flsh->fd>=0 | | flsh->fd>=0
1746 | [Separated] | | [Dropping]
1747 | main F idle | | main none
1748 | old D tail | | old D tail
1749 | ============= | | ============
1751 ^ | EOF ON D | | defer | EOF ON D
1753 | =============== | | ===============
1754 | SEPARATED-2 | | DROPPING-2
1755 | flsh->fd==-1 | V flsh->fd==-1
1756 | [Finishing] | | [Dropping]
1757 | main F tail | `. main none
1758 | old D closed | `. old D closed
1759 | =============== V `. ===============
1761 | | ALL D PROCESSED `. | ALL D PROCESSED
1762 | V install defer as backlog `. | install defer
1763 ^ | close D `. | close D
1764 | | unlink D `. | unlink D
1767 `----------' ==============
1787 static void startup_set_input_file(InputFile *f) {
1788 assert(!main_input_file);
1790 inputfile_tailing_start(f);
1793 static void statemc_init(void) {
1794 struct stat stab, stabf;
1796 path_lock= xasprintf("%s_lock", feedfile);
1797 path_flushing= xasprintf("%s_flushing", feedfile);
1798 path_defer= xasprintf("%s_defer", feedfile);
1799 globpat_backlog= xasprintf("%s_backlog*", feedfile);
1802 int lockfd= open(path_lock, O_CREAT|O_RDWR, 0600);
1803 if (lockfd<0) sysfatal("open lockfile %s", path_lock);
1806 memset(&fl,0,sizeof(fl));
1808 fl.l_whence= SEEK_SET;
1809 int r= fcntl(lockfd, F_SETLK, &fl);
1811 if (errno==EACCES || errno==EAGAIN) {
1812 if (quiet_multiple) exit(0);
1813 fatal("another duct holds the lockfile");
1815 sysdie("fcntl F_SETLK lockfile %s", path_lock);
1818 xfstat_isreg(lockfd, &stabf, path_lock, "lockfile");
1820 xlstat_isreg(path_lock, &stab, &lock_noent, "lockfile");
1822 if (!lock_noent && samefile(&stab, &stabf))
1826 sysdie("could not close stale lockfile %s", path_lock);
1828 debug("startup: locked");
1830 search_backlog_file();
1833 xlstat_isreg(path_defer, &stab, &defer_noent, "defer file");
1835 debug("startup: ductdefer ENOENT");
1837 debug("startup: ductdefer nlink=%ld", (long)stab.st_nlink);
1838 switch (stab.st_nlink==1) {
1840 open_defer(); /* so that we will later close it and rename it */
1843 xunlink(path_defer, "stale defer file link"
1844 " (presumably hardlink to backlog file)");
1847 die("defer file %s has unexpected link count %d",
1848 path_defer, stab.st_nlink);
1852 struct stat stab_f, stab_d;
1855 InputFile *file_d= open_input_file(path_flushing);
1856 if (file_d) xfstat_isreg(file_d->fd, &stab_d, path_flushing,"flushing file");
1858 xlstat_isreg(feedfile, &stab_f, &noent_f, "feedfile");
1860 if (!noent_f && file_d && samefile(&stab_f, &stab_d)) {
1861 debug("startup: F==D => Hardlinked");
1862 xunlink(feedfile, "feed file (during startup)"); /* => Moved */
1867 debug("startup: F ENOENT => Moved");
1868 if (file_d) startup_set_input_file(file_d);
1869 spawn_inndcomm_flush("feedfile missing at startup");
1870 /* => Flushing, sms:=FLUSHING */
1873 debug("startup: F!=D => Separated");
1874 startup_set_input_file(file_d);
1875 SMS(SEPARATED, 0, "found both old and current feed files");
1877 debug("startup: F exists, D ENOENT => Normal");
1878 InputFile *file_f= open_input_file(feedfile);
1879 if (!file_f) die("feed file vanished during startup");
1880 startup_set_input_file(file_f);
1881 SMS(NORMAL, flushfail_retry_periods, "normal startup");
1886 static void statemc_start_flush(const char *why) { /* Normal => Flushing */
1887 assert(sms == sm_NORMAL);
1889 debug("starting flush (%s) (%lu >?= %lu) (%d)",
1891 (unsigned long)(main_input_file ? main_input_file->offset : 0),
1892 (unsigned long)target_max_feedfile_size,
1895 int r= link(feedfile, path_flushing);
1896 if (r) sysdie("link feedfile %s to flushing file %s",
1897 feedfile, path_flushing);
1900 xunlink(feedfile, "old feedfile link");
1903 spawn_inndcomm_flush(why); /* => Flushing FLUSHING */
1906 static void statemc_period_poll(void) {
1907 if (!sm_period_counter) return;
1908 sm_period_counter--;
1909 assert(sm_period_counter>=0);
1911 if (sm_period_counter) return;
1914 statemc_start_flush("periodic"); /* Normal => Flushing; => FLUSHING */
1916 case sm_FLUSHFAILED:
1917 spawn_inndcomm_flush("retry"); /* Moved => Flushing; => FLUSHING */
1924 static int inputfile_is_done(InputFile *ipf) {
1926 if (ipf->inprogress) return 0; /* new article in the meantime */
1927 if (ipf->fd >= 0); return 0; /* not had EOF */
1931 static void notice_processed(InputFile *ipf, const char *what,
1933 #define RCI_NOTHING(x) /* nothing */
1934 #define RCI_TRIPLE_FMT(x) " " #x "=" RCI_TRIPLE_FMT_BASE
1935 #define RCI_TRIPLE_VALS(x) , RCI_TRIPLE_VALS_BASE(ipf->counts, [RC_##x])
1937 #define CNT(art,rc) (ipf->counts[art_##art][RC_##rc])
1939 info("processed %s%s read=%d(+%dbl,+%derr)"
1940 " offered=%d(ch%d,nc%d) accepted=%d(ch%d+nc%d)"
1941 RESULT_COUNTS(RCI_NOTHING, RCI_TRIPLE_FMT)
1944 ipf->readcount_ok, ipf->readcount_blank, ipf->readcount_err,
1945 CNT(Unchecked,sent) + CNT(Unsolicited,sent)
1946 , CNT(Unchecked,sent), CNT(Unsolicited,sent),
1947 CNT(Wanted,accepted) + CNT(Unsolicited,accepted)
1948 , CNT(Wanted,accepted), CNT(Unsolicited,accepted)
1949 RESULT_COUNTS(RCI_NOTHING, RCI_TRIPLE_VALS)
1955 static void statemc_check_backlog_done(void) {
1956 InputFile *ipf= backlog_input_file;
1957 if (!inputfile_is_done(ipf)) return;
1959 const char *slash= strrchr(ipf->path, '/');
1960 const char *leaf= slash ? slash+1 : ipf->path;
1961 const char *under= strchr(slash, '_');
1962 const char *rest= under ? under+1 : leaf;
1963 if (!strncmp(rest,"backlog",7)) rest += 7;
1964 notice_processed(ipf,"backlog:",rest);
1966 close_input_file(ipf);
1967 if (unlink(ipf->path)) {
1968 if (errno != ENOENT)
1969 sysdie("could not unlink processed backlog file %s", ipf->path);
1970 warn("backlog file %s vanished while we were reading it"
1971 " so we couldn't remove it (but it's done now, anyway)",
1975 backlog_input_file= 0;
1976 search_backlog_file();
1980 static void statemc_check_flushing_done(void) {
1981 InputFile *ipf= flushing_input_file;
1982 if (!inputfile_is_done(ipf)) return;
1984 assert(sms==sm_SEPARATED || sms==sm_DROPPING);
1986 notice_processed(ipf,"feedfile",0);
1990 xunlink(path_flushing, "old flushing file");
1992 close_input_file(flushing_input_file);
1993 free(flushing_input_file);
1994 flushing_input_file= 0;
1996 if (sms==sm_SEPARATED) {
1997 notice("flush complete");
1998 SMS(NORMAL, 0, "flush complete");
1999 } else if (sms==sm_DROPPING) {
2000 SMS(DROPPED, 0, "old flush complete");
2001 search_backlog_file();
2002 notice("feed dropped, but will continue until backlog is finished");
2006 static void *statemc_check_input_done(oop_source *lp, struct timeval now,
2008 assert(!inputfile_is_done(main_input_file));
2009 statemc_check_flushing_done();
2010 statemc_check_backlog_done();
2011 return OOP_CONTINUE;
2014 static void queue_check_input_done(void) {
2015 loop->on_time(loop, OOP_TIME_NOW, statemc_check_input_done, 0);
2018 static void statemc_setstate(StateMachineState newsms, int periods,
2019 const char *forlog, const char *why) {
2021 sm_period_counter= periods;
2023 const char *xtra= "";
2025 case sm_FLUSHING: sm_FLUSHFAILED:
2026 if (!main_input_file) xtra= "-ABSENT";
2028 case sm_SEPARATED: case sm_DROPPING:
2029 xtra= flushing_input_file->fd >= 0 ? "-1" : "-2";
2035 info("%s%s[%d] %s",forlog,xtra,periods,why);
2037 info("%s%s %s",forlog,xtra,why);
2041 /*---------- defer and backlog files ----------*/
2043 static void open_defer(void) {
2048 defer= fopen(path_defer, "a+");
2049 if (!defer) sysfatal("could not open defer file %s", path_defer);
2051 /* truncate away any half-written records */
2053 xfstat_isreg(fileno(defer), &stab, path_defer, "newly opened defer file");
2055 if (stab.st_size > LONG_MAX)
2056 die("defer file %s size is far too large", path_defer);
2061 long orgsize= stab.st_size;
2062 long truncto= stab.st_size;
2064 if (!truncto) break; /* was only (if anything) one half-truncated record */
2065 if (fseek(defer, truncto-1, SEEK_SET) < 0)
2066 sysdie("seek in defer file %s while truncating partial", path_defer);
2071 sysdie("failed read from defer file %s", path_defer);
2073 die("defer file %s shrank while we were checking it!", path_defer);
2079 if (stab.st_size != truncto) {
2080 warn("truncating half-record at end of defer file %s -"
2081 " shrinking by %ld bytes from %ld to %ld",
2082 path_defer, orgsize - truncto, orgsize, truncto);
2085 sysfatal("could not flush defer file %s", path_defer);
2086 if (ftruncate(fileno(defer), truncto))
2087 sysdie("could not truncate defer file %s", path_defer);
2090 info("continuing existing defer file %s (%ld bytes)",
2091 path_defer, orgsize);
2093 if (fseek(defer, truncto, SEEK_SET))
2094 sysdie("could not seek to new end of defer file %s", path_defer);
2097 static void close_defer(void) {
2102 xfstat_isreg(fileno(defer), &stab, path_defer, "defer file");
2104 if (fclose(defer)) sysfatal("could not close defer file %s", path_defer);
2107 time_t now= xtime();
2109 char *backlog= xasprintf("%s_backlog_%lu.%lu", feedfile,
2111 (unsigned long)stab.st_ino);
2112 if (link(path_defer, backlog))
2113 sysfatal("could not install defer file %s as backlog file %s",
2114 path_defer, backlog);
2115 if (unlink(path_defer))
2116 sysdie("could not unlink old defer link %s to backlog file %s",
2117 path_defer, backlog);
2121 if (until_backlog_nextscan < 0 ||
2122 until_backlog_nextscan > backlog_retry_minperiods + 1)
2123 until_backlog_nextscan= backlog_retry_minperiods + 1;
2126 static void poll_backlog_file(void) {
2127 if (until_backlog_nextscan < 0) return;
2128 if (until_backlog_nextscan-- > 0) return;
2129 search_backlog_file();
2132 static void search_backlog_file(void) {
2133 /* returns non-0 iff there are any backlog files */
2138 const char *oldest_path=0;
2139 time_t oldest_mtime, now;
2141 if (backlog_input_file) return;
2145 r= glob(globpat_backlog, GLOB_ERR|GLOB_MARK|GLOB_NOSORT, 0, &gl);
2149 sysdie("failed to expand backlog pattern %s", globpat_backlog);
2151 die("out of memory expanding backlog pattern %s", globpat_backlog);
2153 for (i=0; i<gl.gl_pathc; i++) {
2154 const char *path= gl.gl_pathv[i];
2156 if (strchr(path,'#') || strchr(path,'~')) {
2157 debug("backlog file search skipping %s", path);
2160 r= stat(path, &stab);
2162 syswarn("failed to stat backlog file %s", path);
2165 if (!S_ISREG(stab.st_mode)) {
2166 warn("backlog file %s is not a plain file (or link to one)", path);
2169 if (!oldest_path || stab.st_mtime < oldest_mtime) {
2171 oldest_mtime= stab.st_mtime;
2174 case GLOB_NOMATCH: /* fall through */
2177 sysdie("glob expansion of backlog pattern %s gave unexpected"
2178 " nonzero (error?) return value %d", globpat_backlog, r);
2184 debug("backlog scan: none");
2186 if (sms==sm_DROPPED) {
2187 notice("feed dropped and our work is complete");
2188 xunlink(path_lock, "lockfile for old feed");
2191 until_backlog_nextscan= backlog_spontaneous_rescan_periods;
2196 double age= difftime(now, oldest_mtime);
2197 long age_deficiency= (backlog_retry_minperiods * PERIOD_SECONDS) - age;
2199 if (age_deficiency <= 0) {
2200 debug("backlog scan: found age=%f deficiency=%ld oldest=%s",
2201 age, age_deficiency, oldest_path);
2203 backlog_input_file= open_input_file(oldest_path);
2204 if (!backlog_input_file) {
2205 warn("backlog file %s vanished as we opened it", backlog_input_file);
2208 inputfile_tailing_start(backlog_input_file);
2209 until_backlog_nextscan= -1;
2213 until_backlog_nextscan= age_deficiency / PERIOD_SECONDS;
2215 if (backlog_spontaneous_rescan_periods >= 0 &&
2216 until_backlog_nextscan > backlog_spontaneous_rescan_periods)
2217 until_backlog_nextscan= backlog_spontaneous_rescan_periods;
2219 debug("backlog scan: young age=%f deficiency=%ld nextscan=%d oldest=%s",
2220 age, age_deficiency, until_backlog_nextscan, oldest_path);
2224 /*========== flushing the feed ==========*/
2226 static pid_t inndcomm_child;
2228 static void *inndcomm_event(oop_source *lp, int fd, oop_event e, void *u) {
2229 assert(inndcomm_child);
2230 int status= xwaitpid(&inndcomm_child, "inndcomm");
2231 cancel_fd_read_except(fd);
2234 assert(!flushing_input_file);
2236 if (WIFEXITED(status)) {
2237 switch (WEXITSTATUS(status)) {
2239 case INNDCOMMCHILD_ESTATUS_FAIL:
2242 case INNDCOMMCHILD_ESTATUS_NONESUCH:
2243 warn("feed has been dropped by innd, finishing up");
2244 flushing_input_file= main_input_file;
2245 tailing_queue_readable(flushing_input_file);
2246 /* we probably previously returned EAGAIN from our fake read method
2247 * when in fact we were at EOF, so signal another readable event
2248 * so we actually see the EOF */
2252 if (flushing_input_file) {
2253 SMS(DROPPING, 0, "feed dropped by innd, but must finish last flush");
2256 SMS(DROPPED, 0, "feed dropped by innd");
2257 search_backlog_file();
2259 return OOP_CONTINUE;
2263 flushing_input_file= main_input_file;
2264 tailing_queue_readable(flushing_input_file);
2266 main_input_file= open_input_file(feedfile);
2267 if (!main_input_file)
2268 die("flush succeeded but feedfile %s does not exist!", feedfile);
2270 if (flushing_input_file) {
2271 SMS(SEPARATED, spontaneous_flush_periods, "recovery flush complete");
2274 SMS(NORMAL, spontaneous_flush_periods, "flush complete");
2276 return OOP_CONTINUE;
2279 goto unexpected_exitstatus;
2282 } else if (WIFSIGNALED(status) && WTERMSIG(status) == SIGALRM) {
2283 warn("flush timed out trying to talk to innd");
2286 unexpected_exitstatus:
2287 report_child_status("inndcomm child", status);
2291 SMS(FLUSHFAILED, flushfail_retry_periods, "flush failed, will retry");
2294 static void inndcommfail(const char *what) {
2295 syswarn("error communicating with innd: %s failed: %s", what, ICCfailure);
2296 exit(INNDCOMMCHILD_ESTATUS_FAIL);
2299 void spawn_inndcomm_flush(const char *why) { /* Moved => Flushing */
2302 notice("flushing %s",why);
2304 assert(sms==sm_NORMAL || sms==sm_FLUSHFAILED);
2305 assert(!inndcomm_child);
2307 if (pipe(pipefds)) sysdie("create pipe for inndcomm child sentinel");
2309 inndcomm_child= xfork("inndcomm child");
2311 if (!inndcomm_child) {
2312 const char *flushargv[2]= { sitename, 0 };
2318 alarm(inndcomm_flush_timeout);
2319 r= ICCopen(); if (r) inndcommfail("connect");
2320 r= ICCcommand('f',flushargv,&reply); if (r<0) inndcommfail("transmit");
2321 if (!r) exit(0); /* yay! */
2323 if (!strcmp(reply, "1 No such site")) exit(INNDCOMMCHILD_ESTATUS_NONESUCH);
2324 syswarn("innd ctlinnd flush failed: innd said %s", reply);
2325 exit(INNDCOMMCHILD_ESTATUS_FAIL);
2329 int sentinel_fd= pipefds[0];
2330 on_fd_read_except(sentinel_fd, inndcomm_event);
2332 SMS(FLUSHING, 0, why);
2335 /*========== main program ==========*/
2337 static void postfork_inputfile(InputFile *ipf) {
2339 assert(ipf->fd >= 0);
2344 static void postfork_stdio(FILE *f) {
2345 /* we have no stdio streams that are buffered long-term */
2349 static void postfork(const char *what) {
2350 if (signal(SIGPIPE, SIG_DFL) == SIG_ERR)
2351 sysdie("%s child: failed to reset SIGPIPE");
2353 postfork_inputfile(main_input_file);
2354 postfork_inputfile(flushing_input_file);
2357 for (conn=LIST_HEAD(conns); conn; conn=LIST_NEXT(conn))
2360 postfork_stdio(defer);
2363 #define EVERY(what, interval_sec, interval_usec, body) \
2364 static const struct timeval what##_timeout = \
2365 { interval_sec, interval_usec }; \
2366 static void what##_schedule(void); \
2367 static void *what##_timedout(oop_source *lp, struct timeval tv, void *u) { \
2369 what##_schedule(); \
2371 static void what##_schedule(void) { \
2372 loop->on_time(loop, what##_timeout, what##_timedout, 0); \
2375 EVERY(filepoll, 5,0, {
2376 if (main_input_file && main_input_file->readable_callback)
2377 filemon_callback(main_input_file);
2380 #define DEBUGF_IPF(wh) " " #wh "=%p/%s:ip=%ld,off=%ld,fd=%d%s"
2381 #define DEBUG_IPF(wh) \
2382 wh##_input_file, debug_ipf_path(wh##_input_file), \
2383 wh##_input_file->inprogress, (long)wh##_input_file->offset, \
2384 wh##_input_file->fd, wh##_input_file->rd ? "+" : ""
2385 static const char *debug_ipf_path(InputFile *ipf) {
2386 char *slash= strrchr(ipf->path,'/');
2387 return slash ? slash+1 : ipf->path;
2390 EVERY(period, PERIOD_SECONDS,0, {
2392 " sms=%s[%d] conns=%d queue=%d until_connect=%d"
2393 " input_files" DEBUGF_IPF(main) DEBUGF_IPF(old) DEBUGF_IPF(flushing)
2394 " children connecting=%ld inndcomm_child"
2396 sms_names[sms], sm_period_counter,
2397 queue.count, conns.count, until_connect,
2398 DEBUG_IPF(main), DEBUG_IPF(flushing), DEBUG_IPF(flushing),
2399 (long)connecting_child, (long)inndcomm_child
2402 if (until_connect) until_connect--;
2404 poll_backlog_file();
2405 if (!backlog_input_file) close_defer(); /* want to start on a new backlog */
2406 statemc_period_poll();
2407 check_master_queue();
2411 /*========== option parsing ==========*/
2413 static void vbadusage(const char *fmt, va_list al)
2414 __attribute__((__noreturn__,__format__(printf,1,0)));
2415 static void vbadusage(const char *fmt, va_list al) {
2418 static void badusage(const char *fmt, ...)
2419 __attribute__((__noreturn__,__format__(printf,1,2)));
2420 static void badusage(const char *fmt, ...) {
2427 of_seconds= 001000u,
2428 of_boolean= 002000u,
2431 typedef struct Option Option;
2432 typedef void OptionParser(const Option*, const char *val);
2442 static void op_integer(const Option *o, const char *val) {
2445 unsigned long ul= strtoul(val,&ep,10);
2446 if (*ep || ep==val || errno || ul>INT_MAX)
2447 badusage("bad integer value for %s",o->lng);
2448 int *store= o->store;
2452 static void op_double(const Option *o, const char *val) {
2453 int *store= o->store;
2456 *store= strtod(val, &ep);
2457 if (*ep || ep==val || errno)
2458 badusage("bad floating point value for %s",o->lng);
2461 static void op_string(const Option *o, const char *val) {
2462 char **store= o->store;
2467 static void op_seconds(const Option *o, const char *val) {
2468 int *store= o->store;
2471 double v= strtod(val,&ep);
2472 if (ep==val) badusage("bad time/duration value for %s",o->lng);
2474 if (!*ep || !strcmp(ep,"s")) unit= 1;
2475 else if (!strcmp(ep,"m")) unit= 60;
2476 else if (!strcmp(ep,"h")) unit= 3600;
2477 else if (!strcmp(ep,"d")) unit= 86400;
2478 else badusage("bad units %s for time/duration value for %s",ep,o->lng);
2482 if (v > INT_MAX) badusage("time/duration value for %s out of range",o->lng);
2486 static void op_periods_rndup(const Option *o, const char *val) {
2487 int *store= o->store;
2489 *store += PERIOD_SECONDS-1;
2490 *store /= PERIOD_SECONDS;
2493 static void op_periods_booltrue(const Option *o, const char *val) {
2494 int *store= o->store;
2497 static void op_periods_boolfalse(const Option *o, const char *val) {
2498 int *store= o->store;
2502 static const Option options[]= {
2503 {'f',"feedfile", &feedfile, op_string },
2504 {'q',"quiet-multiple", &quiet_multiple, op_booltrue, 1 },
2506 { 0, "max-connections", &max_connections op_integer },
2507 { 0, "max-queue-per-conn", &max_queue_per_conn op_integer },
2510 { 0, "streaming", &try_stream, op_booltrue, 1 },
2511 { 0, "no-streaming", &try_stream, op_boolfalse, 1 },
2512 {'P',"port", &port op_integer },
2513 { 0, "inndconf", &inndconffile, op_string },
2514 {'d',"daemon", &become_daemon, op_booltrue, 1 },
2515 { 0, "no-daemon", &become_daemon, op_boolfalse, 1 },
2517 { 0, "no-check-proportion", &nocheck_thresh_pct, op_double },
2518 { 0, "no-check-filter", &nocheck_decay_articles, op_double },
2520 { 0, "reconnect-interval", &reconnect_delay_periods, op_periods_rndup },
2521 { 0, "flush-retry-interval", &flushfail_retry_periods, op_periods_rndup },
2522 { 0, "connection-timeout", &connection_timeout, op_seconds },
2523 { 0, "inndcomm-timeout", &inndcomm_flush_timeout, op_seconds },
2526 int main(int argc, char **argv) {
2532 if (*arg != '-') break;
2533 if (!strcmp(arg,"--")) { arg= *++argv; break; }
2535 while ((a= *++arg)) {
2539 char *equals= strchr(arg,'=');
2540 int len= equals ? (equals - arg) : strlen(arg);
2541 for (o=options; o->lng; o++)
2542 if (strlen(o->lng) == len && !memcmp(o->lng,arg,len))
2544 badusage("unknown long option --%s",arg);
2547 if (equals) badusage("option --%s does not take a value",o->lng);
2549 } else if (equals) {
2553 if (!arg) badusage("option --%s needs a value",o->lng);
2556 break; /* eaten the whole argument now */
2558 for (o=options; o->lng; o++)
2561 badusage("unknown short option -%c",a);
2568 if (!arg) badusage("option -%c needs a value",o->shrt);
2571 break; /* eaten the whole argument now */
2576 if (!arg) badusage("need site name argument");
2582 if (*++argv) badusage("too many non-option arguments");
2584 if (nocheck_thresh_pct < 0 || nocheck_thresh_pct > 100)
2585 badusage("nocheck threshold percentage must be between 0..100");
2586 nocheck_thresh= nocheck_thresh_pct * 0.01;
2588 if (nocheck_decay_articles < 0.1)
2589 badusage("nocheck decay articles must be at least 0.1");
2590 nocheck_decay= 1 - 1/nocheck_decay_articles;
2593 pathoutgoing= innconf->pathoutgoing;
2594 innconf_read(inndconffile);
2597 feedfile= xasprintf("%s/%s",pathoutgoing,sitename);
2598 else if (!feedfile[0])
2599 badusage("feed filename must be nonempty");
2600 else if (feedfile[strlen(feedfile)-1]=='/')
2601 feedfile= xasprintf("%s%s",feedfile,sitename);
2603 const char *feedfile_forbidden= "?*[~#";
2605 while ((c= *feedfile_forbidden++))
2606 if (strchr(feedfile, c))
2607 badusage("feed filename may not contain metacharacter %c",c);
2609 loop= oop_sys_new();
2610 if (!loop) sysdie("could not create liboop event loop");
2612 if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
2613 sysdie("could not ignore SIGPIPE");
2615 if (become_daemon) {
2616 for (i=3; i<255; i++)
2617 /* do this now before we open syslog, etc. */
2619 openlog("innduct",LOG_NDELAY|LOG_PID,LOG_NEWS);
2621 int null= open("/dev/null",O_RDWR);
2622 if (null<0) sysdie("failed to open /dev/null");
2628 pid_t child1= xfork("daemonise first fork");
2629 if (child1) _exit(0);
2631 pid_t sid= setsid();
2632 if (sid != child1) sysdie("setsid failed");
2634 pid_t child2= xfork("daemonise second fork");
2635 if (child2) _exit(0);
2640 if (!filemon_init()) {
2641 warn("no file monitoring available, polling");
2642 filepoll_schedule();