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"
167 #include <sys/types.h>
168 #include <sys/wait.h>
169 #include <sys/stat.h>
170 #include <sys/socket.h>
184 #include <oop-read.h>
186 /*----- general definitions, probably best not changed -----*/
188 #define PERIOD_SECONDS 60
190 #define CONNCHILD_ESTATUS_STREAM 4
191 #define CONNCHILD_ESTATUS_NOSTREAM 5
193 #define INNDCOMMCHILD_ESTATUS_FAIL 6
194 #define INNDCOMMCHILD_ESTATUS_NONESUCH 7
196 #define MAX_LINE_FEEDFILE (NNTP_MSGID_MAXLEN + sizeof(TOKEN)*2 + 10)
198 /*----- doubly linked lists -----*/
200 #define ISNODE(T) struct { T *succ, *pred; } node /* must be at start */
201 #define DEFLIST(T) typedef struct { T *hd, *tl, *tp; int count; } T##List
203 #define NODE(n) (assert((void*)&(n)->node == &(n)), \
204 (struct node*)&(n)->node)
206 #define LIST_CHECKCANHAVENODE(l,n) \
207 ((void)((n) == ((l).hd))) /* just for the type check */
209 #define LIST_ADDSOMEHOW(l,n,list_addsomehow) \
210 ( LIST_CHECKCANHAVENODE(l,n), \
211 list_addsomehow((struct list*)&(l), NODE((n))), \
215 #define LIST_REMSOMEHOW(l,list_remsomehow) \
219 list_remsomehow((struct list*)&(l)) ) \
225 #define LIST_ADDHEAD(l,n) LIST_ADDSOMEHOW((l),(n),list_addhead)
226 #define LIST_ADDTAIL(l,n) LIST_ADDSOMEHOW((l),(n),list_addtail)
227 #define LIST_REMHEAD(l) LIST_REMSOMEHOW((l),list_remhead)
228 #define LIST_REMTAIL(l) LIST_REMSOMEHOW((l),list_remtail)
230 #define LIST_HEAD(l) ((typeof((l).hd))(list_head((struct list*)&(l))))
231 #define LIST_NEXT(n) ((typeof(n))list_succ(NODE((n))))
232 #define LIST_BACK(n) ((typeof(n))list_pred(NODE((n))))
234 #define LIST_REMOVE(l,n) \
235 ( LIST_CHECKCANHAVENODE(l,n), \
236 list_remove(NODE((n))), \
240 #define LIST_INSERT(l,n,pred) \
241 ( LIST_CHECKCANHAVENODE(l,n), \
242 LIST_CHECKCANHAVENODE(l,pred), \
243 list_insert((struct list*)&(l), NODE((n)), NODE((pred))), \
247 /*----- type predeclarations -----*/
249 typedef struct Conn Conn;
250 typedef struct Article Article;
251 typedef struct InputFile InputFile;
252 typedef struct XmitDetails XmitDetails;
253 typedef struct Filemon_Perfile Filemon_Perfile;
254 typedef enum StateMachineState StateMachineState;
259 /*----- function predeclarations -----*/
261 static void conn_maybe_write(Conn *conn);
262 static void conn_make_some_xmits(Conn *conn);
263 static void *conn_write_some_xmits(Conn *conn);
265 static void xmit_free(XmitDetails *d);
267 static void statemc_setstate(StateMachineState newsms, int periods,
268 const char *forlog, const char *why);
269 static void statemc_start_flush(const char *why); /* Normal => Flushing */
270 static void spawn_inndcomm_flush(const char *why); /* Moved => Flushing */
272 static void check_master_queue(void);
273 static void queue_check_input_done(void);
275 static void statemc_check_flushing_done(void);
276 static void statemc_check_backlog_done(void);
278 static void postfork(const char *what);
279 static void postfork_inputfile(InputFile *ipf);
281 static void open_defer(void);
282 static void close_defer(void);
283 static void search_backlog_file(void);
285 static void inputfile_tailing_start(InputFile *ipf);
286 static void inputfile_tailing_stop(InputFile *ipf);
288 static int filemon_init(void);
289 static void filemon_start(InputFile *ipf);
290 static void filemon_stop(InputFile *ipf);
291 static void filemon_callback(InputFile *ipf);
293 /*----- configuration options -----*/
295 static char *sitename, *feedfile;
296 static const char *remote_host;
297 static int quiet_multiple=0, become_daemon=1;
299 static int max_connections=10, max_queue_per_conn=200;
300 static int target_max_feedfile_size=100000;
302 static double max_bad_data_ratio= 0.01;
303 static int max_bad_data_initial= 30;
304 /* in one corrupt 4096-byte block the number of newlines has
305 * mean 16 and standard deviation 3.99. 30 corresponds to z=+3.5 */
307 static int connection_setup_timeout=200, port=119, try_stream=1;
308 static int inndcomm_flush_timeout=100;
309 static int reconnect_delay_periods, flushfail_retry_periods, open_wait_periods;
310 static int backlog_retry_minperiods, backlog_spontaneous_rescan_periods;
311 static const char *inndconffile;
313 static double nocheck_thresh_pct= 95.0;
314 static double nocheck_thresh; /* computed in main from _pct */
315 static double nocheck_decay_articles= 100; /* converted to _decay */
316 static double nocheck_decay; /* computed in main from _articles */
319 /*----- statistics -----*/
321 typedef enum { /* in queue in conn->sent */
322 art_Unchecked, /* not checked, not sent checking */
323 art_Wanted, /* checked, wanted sent body as requested */
324 art_Unsolicited, /* - sent body without check */
328 #define RESULT_COUNTS(RCS,RCN) \
336 #define RCI_TRIPLE_FMT_BASE "%d(id%d+bd%d+nc%d)"
337 #define RCI_TRIPLE_VALS_BASE(counts,x) \
338 counts[art_Unchecked] x \
339 + counts[art_Wanted] x \
340 + counts[art_Unsolicited] x, \
341 counts[art_Unchecked] x \
342 , counts[art_Wanted] x \
343 , counts[art_Unsolicited] x
346 #define RC_INDEX(x) RC_##x,
347 RESULT_COUNTS(RC_INDEX, RC_INDEX)
352 /*----- transmission buffers -----*/
357 xk_Malloc, xk_Const, xk_Artdata
369 /*----- core operational data structure types -----*/
372 /* This is also an instance of struct oop_readable */
373 struct oop_readable readable; /* first */
374 oop_readable_call *readable_callback;
375 void *readable_callback_user;
378 Filemon_Perfile *filemon;
381 long inprogress; /* no. of articles read but not processed */
385 int counts[art_MaxState][RCI_max];
386 int readcount_ok, readcount_blank, readcount_err;
401 #define SMS_LIST(X) \
409 enum StateMachineState {
410 #define SMS_DEF_ENUM(s) sm_##s,
411 SMS_LIST(SMS_DEF_ENUM)
414 static const char *sms_names[]= {
415 #define SMS_DEF_NAME(s) #s ,
416 SMS_LIST(SMS_DEF_NAME)
422 int fd, max_queue, stream, quitting;
423 ArticleList waiting; /* not yet told peer */
424 ArticleList priority; /* peer says send it now */
425 ArticleList sent; /* offered/transmitted - in xmit or waiting reply */
426 struct iovec xmit[CONNIOVS];
427 XmitDetails xmitd[CONNIOVS];
432 /*----- operational variables -----*/
434 static oop_source *loop;
436 static int until_connect;
437 static ConnList conns;
438 static ArticleList queue;
440 static char *path_lock, *path_flushing, *path_defer, *globpat_backlog;
442 #define SMS(newstate, periods, why) \
443 (statemc_setstate(sm_##newstate,(periods),#newstate,(why)))
445 static StateMachineState sms;
447 static InputFile *main_input_file, *flushing_input_file, *backlog_input_file;
448 static int sm_period_counter, until_backlog_nextscan;
450 static double accept_proportion;
451 static int nocheck, nocheck_reported;
453 /*========== logging ==========*/
455 static void logcore(int sysloglevel, const char *fmt, ...)
456 __attribute__((__format__(printf,2,3)));
457 static void logcore(int sysloglevel, const char *fmt, ...) {
461 vsyslog(sysloglevel,fmt,al);
463 vfprintf(stderr,fmt,al);
469 static void logv(int sysloglevel, const char *pfx, int errnoval,
470 int exitstatus, const char *fmt, va_list al)
471 __attribute__((__format__(printf,5,0)));
472 static void logv(int sysloglevel, const char *pfx, int errnoval,
473 int exitstatus, const char *fmt, va_list al) {
474 char msgbuf[256]; /* NB do not call xvasprintf here or you'll recurse */
475 vsnprintf(msgbuf,sizeof(msgbuf), fmt,al);
476 msgbuf[sizeof(msgbuf)-1]= 0;
478 if (sysloglevel >= LOG_ERR && (errnoval==EACCES || errnoval==EPERM))
479 sysloglevel= LOG_ERR; /* run by wrong user, probably */
481 logcore(sysloglevel, "<%s>%s: %s%s%s",
482 sitename, pfx, msgbuf,
483 errnoval>=0 ? ": " : "",
484 errnoval>=0 ? strerror(errnoval) : "");
487 #define logwrap(fn, pfx, sysloglevel, err, estatus) \
488 static void fn(const char *fmt, ...) \
489 __attribute__((__format__(printf,1,2))); \
490 static void fn(const char *fmt, ...) { \
493 logv(sysloglevel, pfx, err, estatus, fmt, al); \
496 logwrap(sysdie, " critical", LOG_CRIT, errno, 16);
497 logwrap(die, " critical", LOG_CRIT, -1, 16);
499 logwrap(sysfatal, " fatal", LOG_ERR, errno, 12);
500 logwrap(fatal, " fatal", LOG_ERR, -1, 12);
502 logwrap(syswarn, " warning", LOG_WARNING, errno, 0);
503 logwrap(warn, " warning", LOG_WARNING, -1, 0);
505 logwrap(notice, "", LOG_NOTICE, -1, 0);
506 logwrap(info, " info", LOG_INFO, -1, 0);
507 logwrap(debug, " debug", LOG_DEBUG, -1, 0);
510 /*========== utility functions etc. ==========*/
512 static char *xvasprintf(const char *fmt, va_list al)
513 __attribute__((__format__(printf,1,0)));
514 static char *xvasprintf(const char *fmt, va_list al) {
516 int rc= vasprintf(&str,fmt,al);
517 if (rc<0) sysdie("vasprintf(\"%s\",...) failed", fmt);
520 static char *xasprintf(const char *fmt, ...)
521 __attribute__((__format__(printf,1,2)));
522 static char *xasprintf(const char *fmt, ...) {
525 char *str= xvasprintf(fmt,al);
530 static void perhaps_close(int *fd) { if (*fd) { close(*fd); fd=0; } }
532 static pid_t xfork(const char *what) {
536 if (child==-1) sysdie("cannot fork for %s",what);
537 if (!child) postfork(what);
538 debug("forked %s %ld", what, (unsigned long)child);
542 static void on_fd_read_except(int fd, oop_call_fd callback) {
543 loop->on_fd(loop, fd, OOP_READ, callback, 0);
544 loop->on_fd(loop, fd, OOP_EXCEPTION, callback, 0);
546 static void cancel_fd_read_except(int fd) {
547 loop->cancel_fd(loop, fd, OOP_READ);
548 loop->cancel_fd(loop, fd, OOP_EXCEPTION);
551 static void report_child_status(const char *what, int status) {
552 if (WIFEXITED(status)) {
553 int es= WEXITSTATUS(status);
555 warn("%s: child died with error exit status %d",es);
556 } else if (WIFSIGNALED(status)) {
557 int sig= WTERMSIG(status);
558 const char *sigstr= strsignal(sig);
559 const char *coredump= WCOREDUMP(status) ? " (core dumped)" : "";
561 warn("%s: child died due to fatal signal %s%s", what, sigstr, coredump);
563 warn("%s: child died due to unknown fatal signal %d%s",
564 what, sig, coredump);
566 warn("%s: child died with unknown wait status %d", status);
570 static int xwaitpid(pid_t *pid, const char *what) {
573 int r= kill(*pid, SIGKILL);
574 if (r) sysdie("cannot kill %s child", what);
576 pid_t got= waitpid(*pid, &status, WNOHANG);
577 if (got==-1) sysdie("cannot reap %s child", what);
584 static void xunlink(const char *path, const char *what) {
586 if (r) sysdie("can't unlink %s %s", path, what);
589 static void check_isreg(const struct stat *stab, const char *path,
591 if (!S_ISREG(stab->st_mode))
592 die("%s %s not a plain file (mode 0%lo)",
593 what, path, (unsigned long)stab->st_mode);
596 static void xfstat(int fd, struct stat *stab_r, const char *what) {
597 int r= fstat(fd, stab_r);
598 if (r) sysdie("could not fstat %s", what);
601 static void xfstat_isreg(int fd, struct stat *stab_r,
602 const char *path, const char *what) {
603 xfstat(fd, stab_r, what);
604 check_isreg(stab_r, path, what);
607 static void xlstat_isreg(const char *path, struct stat *stab,
608 int *enoent_r /* 0 means ENOENT is fatal */,
610 int r= lstat(path, stab);
612 if (errno==ENOENT && enoent_r) { *enoent_r=1; return; }
613 sysdie("could not lstat %s %s", what, path);
615 if (enoent_r) *enoent_r= 0;
616 check_isreg(stab, path, what);
619 static void setnonblock(int fd, int nonblocking) {
620 int r= fcntl(fd, F_GETFL); if (r<0) sysdie("setnonblocking fcntl F_GETFL");
621 if (nonblocking) r |= O_NONBLOCK;
622 else r &= ~O_NONBLOCK;
623 r= fcntl(fd, F_SETFL, r); if (r<0) sysdie("setnonblocking fcntl F_SETFL");
626 static int samefile(const struct stat *a, const struct stat *b) {
627 assert(S_ISREG(a->st_mode));
628 assert(S_ISREG(b->st_mode));
629 return (a->st_ino == b->st_ino &&
630 a->st_dev == b->st_dev);
633 static char *sanitise(const char *input) {
634 static char sanibuf[100]; /* returns pointer to this buffer! */
636 const char *p= input;
640 if (q > sanibuf+sizeof(sanibuf)-8) { strcpy(q,"'.."); break; }
642 if (!c) { *q++= '\''; *q=0; break; }
643 if (c>=' ' && c<=126 && c!='\\') { *q++= c; continue; }
644 sprintf(q,"\\x%02x",c);
650 /*========== making new connections ==========*/
652 static void conn_dispose(Conn *conn) {
654 perhaps_close(&conn->fd);
656 until_connect= reconnect_delay_periods;
659 static int connecting_sockets[2]= {-1,-1};
660 static pid_t connecting_child;
662 static void connect_attempt_discard(void) {
663 if (connecting_sockets[0])
664 cancel_fd_read_except(connecting_sockets[0]);
666 perhaps_close(&connecting_sockets[0]);
667 perhaps_close(&connecting_sockets[1]);
669 if (connecting_child) {
670 int r= kill(connecting_child, SIGTERM);
671 if (r) syswarn("failed to kill connecting child");
672 int status= xwaitpid(&connecting_child, "connect");
674 if (!(WIFEXITED(status) ||
675 (WIFSIGNALED(status) && WTERMSIG(status) == SIGKILL)))
676 report_child_status("connect", status);
680 #define PREP_DECL_MSG_CMSG(msg) \
682 memset(&msg,0,sizeof(msg)); \
683 char msg##cbuf[CMSG_SPACE(sizeof(fd))]; \
684 msg.msg_control= msg##cbuf; \
685 msg.msg_controllen= sizeof(msg##cbuf);
687 static void *connchild_event(oop_source *lp, int fd, oop_event e, void *u) {
690 conn= xmalloc(sizeof(*conn));
691 memset(conn,0,sizeof(*conn));
693 PREP_DECL_MSG_CMSG(msg);
694 struct cmsghdr *h= 0;
695 ssize_t rs= recvmsg(fd, &msg, MSG_DONTWAIT);
696 if (rs >= 0) h= CMSG_FIRSTHDR(&msg);
699 pid_t got= waitpid(connecting_child, &status, WNOHANG);
701 assert(got==connecting_child);
703 if (WIFEXITED(status) &&
704 (WEXITSTATUS(status) != 0 &&
705 WEXITSTATUS(status) != CONNCHILD_ESTATUS_STREAM &&
706 WEXITSTATUS(status) != CONNCHILD_ESTATUS_NOSTREAM)) {
707 /* child already reported the problem */
708 } else if (WIFSIGNALED(status) && WTERMSIG(status) == SIGALRM) {
709 warn("connect: connection attempt timed out");
710 } else if (!WIFEXITED(status)) {
711 report_child_status("connect", status);
712 /* that's probably the root cause then */
715 /* child is still running apparently, report the socket problem */
717 syswarn("connect: read from child socket failed");
718 else if (e == OOP_EXCEPTION)
719 warn("connect: unexpected exception on child socket");
721 warn("connect: unexpected EOF on child socket");
726 #define CHK(field, val) \
727 if (h->cmsg_##field != val) { \
728 die("connect: child sent cmsg with cmsg_" #field "=%d, expected %d"); \
731 CHK(level, SOL_SOCKET);
732 CHK(type, SCM_RIGHTS);
733 CHK(len, CMSG_LEN(sizeof(conn->fd)));
736 if (CMSG_NXTHDR(&msg,h)) { die("connect: child sent many cmsgs"); goto x; }
738 memcpy(&conn->fd, CMSG_DATA(h), sizeof(conn->fd));
741 pid_t got= waitpid(connecting_child, &status, 0);
742 if (got==-1) sysdie("connect: real wait for child");
743 assert(got == connecting_child);
746 if (!WIFEXITED(status)) { report_child_status("connect",status); goto x; }
747 int es= WEXITSTATUS(status);
749 case CONNCHILD_ESTATUS_STREAM: conn->stream= 1; break;
750 case CONNCHILD_ESTATUS_NOSTREAM: conn->stream= 0; break;
752 fatal("connect: child gave unexpected exit status %d", es);
756 setnonblock(conn->fd, 1);
757 conn->max_queue= conn->stream ? max_queue_per_conn : 1;
758 LIST_ADDHEAD(conns, conn);
759 notice("C%d connected %s", conn->fd, conn->stream ? "streaming" : "plain");
760 connect_attempt_discard();
761 check_master_queue();
766 connect_attempt_discard();
769 static int allow_connect_start(void) {
770 return conns.count < max_connections
775 static void connect_start(void) {
776 assert(!connecting_sockets[0]);
777 assert(!connecting_sockets[1]);
778 assert(!connecting_child);
780 notice("starting connection attempt");
782 int r= socketpair(AF_UNIX, SOCK_STREAM, 0, connecting_sockets);
783 if (r) { syswarn("connect: cannot create socketpair for child"); goto x; }
785 connecting_child= xfork("connection");
787 if (!connecting_child) {
788 FILE *cn_from, *cn_to;
789 char buf[NNTP_STRLEN+100];
790 int exitstatus= CONNCHILD_ESTATUS_NOSTREAM;
792 r= close(connecting_sockets[0]);
793 if (r) sysdie("connect: close parent socket in child");
795 alarm(connection_setup_timeout);
796 if (NNTPconnect((char*)remote_host, port, &cn_from, &cn_to, buf) < 0) {
797 if (buf[0]) fatal("connect: rejected: %s", sanitise(buf));
798 else sysfatal("connect: connection attempt failed");
800 if (NNTPsendpassword((char*)remote_host, cn_from, cn_to) < 0)
801 sysfatal("connect: authentication failed");
803 if (fputs("MODE STREAM\r\n", cn_to) ||
805 sysfatal("connect: could not send MODE STREAM");
806 buf[sizeof(buf)-1]= 0;
807 if (!fgets(buf, sizeof(buf)-1, cn_from)) {
809 sysfatal("connect: could not read response to MODE STREAM");
811 fatal("connect: connection close in response to MODE STREAM");
816 fatal("connect: response to MODE STREAM is too long: %.100s...",
817 remote_host, sanitise(buf));
818 l--; if (l>0 && buf[l-1]=='\r') l--;
821 int rcode= strtoul(buf,&ep,10);
823 fatal("connect: bad response to MODE STREAM: %.50s", sanitise(buf));
827 exitstatus= CONNCHILD_ESTATUS_STREAM;
833 warn("connect: unexpected response to MODE STREAM: %.50s",
839 int fd= fileno(cn_from);
841 PREP_DECL_MSG_CMSG(msg);
842 struct cmsghdr *cmsg= CMSG_FIRSTHDR(&msg);
843 cmsg->cmsg_level= SOL_SOCKET;
844 cmsg->cmsg_type= SCM_RIGHTS;
845 cmsg->cmsg_len= CMSG_LEN(sizeof(fd));
846 memcpy(CMSG_DATA(cmsg), &fd, sizeof(fd));
848 msg.msg_controllen= cmsg->cmsg_len;
849 r= sendmsg(connecting_sockets[1], &msg, 0);
850 if (r) sysdie("sendmsg failed for new connection");
855 r= close(connecting_sockets[1]); connecting_sockets[1]= 0;
856 if (r) sysdie("connect: close child socket in parent");
858 on_fd_read_except(connecting_sockets[0], connchild_event);
862 connect_attempt_discard();
866 /*========== overall control of article flow ==========*/
868 static void check_master_queue(void) {
876 /* Find a connection to offer this article. We prefer a busy
877 * connection to an idle one, provided it's not full. We take the
878 * first (oldest) and since that's stable, it will mean we fill up
879 * connections in order. That way if we have too many
880 * connections, the spare ones will go away eventually.
882 for (walk=LIST_HEAD(conns); walk; walk=LIST_NEXT(walk)) {
883 int inqueue= walk->sent.count + walk->priority.count
884 + walk->waiting.count;
885 spare= walk->max_queue - inqueue;
886 assert(inqueue <= max_queue_per_conn);
888 if (inqueue==0) /*idle*/ { if (!use) use= walk; }
889 else if (spare>0) /*working*/ { use= walk; break; }
893 Article *art= LIST_REMHEAD(queue);
894 LIST_ADDTAIL(use->waiting, art);
897 conn_maybe_write(use);
898 } else if (allow_connect_start()) {
899 until_connect= reconnect_delay_periods;
908 static void *conn_writeable(oop_source *l, int fd, oop_event ev, void *u) {
913 static void conn_maybe_write(Conn *conn) {
916 conn_make_some_xmits(conn);
918 loop->cancel_fd(loop, conn->fd, OOP_WRITE);
922 void *rp= conn_write_some_xmits(conn);
923 if (rp==OOP_CONTINUE) {
924 loop->on_fd(loop, conn->fd, OOP_WRITE, conn_writeable, conn);
926 } else if (rp==OOP_HALT) {
929 /* transmitted everything */
936 static void vconnfail(Conn *conn, const char *fmt, va_list al)
937 __attribute__((__format__(printf,2,0)));
939 static void vconnfail(Conn *conn, const char *fmt, va_list al) {
940 int requeue[art_MaxState];
943 while ((art= LIST_REMHEAD(conn->priority))) LIST_ADDTAIL(queue, art);
944 while ((art= LIST_REMHEAD(conn->waiting))) LIST_ADDTAIL(queue, art);
945 while ((art= LIST_REMHEAD(conn->sent))) {
946 requeue[art->state]++;
947 if (art->state==art_Unsolicited) art->state= art_Unchecked;
948 LIST_ADDTAIL(queue,art);
953 for (i=0, d=conn->xmitd; i<conn->xmitu; i++, d++)
956 char *m= xvasprintf(fmt,al);
957 warn("C%d connection failed (requeueing " RCI_TRIPLE_FMT_BASE "): %s",
958 conn->fd, RCI_TRIPLE_VALS_BASE(requeue, /*nothing*/), m);
961 LIST_REMOVE(conns,conn);
963 check_master_queue();
966 static void connfail(Conn *conn, const char *fmt, ...)
967 __attribute__((__format__(printf,2,3)));
968 static void connfail(Conn *conn, const char *fmt, ...) {
971 vconnfail(conn,fmt,al);
975 /*========== article transmission ==========*/
977 static XmitDetails *xmit_core(Conn *conn, const char *data, int len,
978 XmitKind kind) { /* caller must then fill in details */
979 struct iovec *v= &conn->xmit[conn->xmitu];
980 XmitDetails *d= &conn->xmitd[conn->xmitu++];
981 v->iov_base= (char*)data;
987 static void xmit_noalloc(Conn *conn, const char *data, int len) {
988 xmit_core(conn,data,len, xk_Const);
990 #define XMIT_LITERAL(lit) (xmit_noalloc(conn, (lit), sizeof(lit)-1))
992 static void xmit_artbody(Conn *conn, ARTHANDLE *ah /* consumed */) {
993 XmitDetails *d= xmit_core(conn, ah->data, ah->len, xk_Artdata);
997 static void xmit_free(XmitDetails *d) {
999 case xk_Malloc: free(d->info.malloc_tofree); break;
1000 case xk_Artdata: SMfreearticle(d->info.sm_art); break;
1001 case xk_Const: break;
1006 static void *conn_write_some_xmits(Conn *conn) {
1008 * 0: nothing more to write, no need to call us again
1009 * OOP_CONTINUE: more to write but fd not writeable
1010 * OOP_HALT: disaster, have destroyed conn
1013 int count= conn->xmitu;
1014 if (!count) return 0;
1016 if (count > IOV_MAX) count= IOV_MAX;
1017 ssize_t rs= writev(conn->fd, conn->xmit, count);
1019 if (errno == EAGAIN) return OOP_CONTINUE;
1020 connfail(conn, "write failed: %s", strerror(errno));
1026 for (done=0; rs && done<conn->xmitu; done++) {
1027 struct iovec *vp= &conn->xmit[done];
1028 XmitDetails *dp= &conn->xmitd[done];
1029 if (rs > vp->iov_len) {
1037 int newu= conn->xmitu - done;
1038 memmove(conn->xmit, conn->xmit + done, newu * sizeof(*conn->xmit));
1039 memmove(conn->xmitd, conn->xmitd + done, newu * sizeof(*conn->xmitd));
1044 static void conn_make_some_xmits(Conn *conn) {
1046 if (conn->xmitu+5 > CONNIOVS)
1049 Article *art= LIST_REMHEAD(conn->priority);
1050 if (!art) art= LIST_REMHEAD(conn->waiting);
1053 if (art->state >= art_Wanted || (conn->stream && nocheck)) {
1054 /* actually send it */
1056 ARTHANDLE *artdata= SMretrieve(art->token, RETR_ALL);
1060 XMIT_LITERAL("TAKETHIS ");
1061 xmit_noalloc(conn, art->messageid, art->midlen);
1062 XMIT_LITERAL("\r\n");
1063 xmit_artbody(conn, artdata);
1066 /* we got 235 from IHAVE */
1068 xmit_artbody(conn, artdata);
1070 XMIT_LITERAL(".\r\n");
1075 art->state == art_Unchecked ? art_Unsolicited :
1076 art->state == art_Wanted ? art_Wanted :
1078 art->ipf->counts[art->state][RC_sent]++;
1079 LIST_ADDTAIL(conn->sent, art);
1085 XMIT_LITERAL("IHAVE ");
1087 XMIT_LITERAL("CHECK ");
1088 xmit_noalloc(conn, art->messageid, art->midlen);
1089 XMIT_LITERAL("\r\n");
1091 assert(art->state == art_Unchecked);
1092 art->ipf->counts[art->state][RC_sent]++;
1093 LIST_ADDTAIL(conn->sent, art);
1099 /*========== handling responses from peer ==========*/
1101 static const oop_rd_style peer_rd_style= {
1102 OOP_RD_DELIM_STRIP, '\n',
1104 OOP_RD_SHORTREC_FORBID
1107 static void *peer_rd_err(oop_source *lp, oop_read *oread, oop_event ev,
1108 const char *errmsg, int errnoval,
1109 const char *data, size_t recsz, void *conn_v) {
1111 connfail(conn, "error receiving from peer: %s", errmsg);
1112 return OOP_CONTINUE;
1115 static Article *article_reply_check(Conn *conn, const char *response,
1116 int code_indicates_streaming,
1118 /* 1:yes, -1:no, 0:dontcare */,
1119 const char *sanitised_response) {
1120 Article *art= LIST_HEAD(conn->sent);
1124 "peer gave unexpected response when no commands outstanding: %s",
1125 sanitised_response);
1129 if (code_indicates_streaming) {
1130 assert(!memchr(response, 0, 4)); /* ensured by peer_rd_ok */
1131 if (!conn->stream) {
1132 connfail(conn, "peer gave streaming response code "
1133 " to IHAVE or subsequent body: %s", sanitised_response);
1136 const char *got_mid= response+4;
1137 int got_midlen= strcspn(got_mid, " \n\r");
1138 if (got_midlen<3 || got_mid[0]!='<' || got_mid[got_midlen-1]!='>') {
1139 connfail(conn, "peer gave streaming response with syntactically invalid"
1140 " messageid: %s", sanitised_response);
1143 if (got_midlen != art->midlen ||
1144 memcmp(got_mid, art->messageid, got_midlen)) {
1145 connfail(conn, "peer gave streaming response code to wrong article -"
1146 " probable synchronisation problem; we offered: %s;"
1148 art->messageid, sanitised_response);
1153 connfail(conn, "peer gave non-streaming response code to"
1154 " CHECK/TAKETHIS: %s", sanitised_response);
1159 if (must_have_sent>0 && art->state < art_Wanted) {
1160 connfail(conn, "peer says article accepted but"
1161 " we had not sent the body: %s", sanitised_response);
1164 if (must_have_sent<0 && art->state >= art_Wanted) {
1165 connfail(conn, "peer says please sent the article but we just did: %s",
1166 sanitised_response);
1170 Article *art_again= LIST_REMHEAD(conn->sent);
1171 assert(art_again == art);
1175 static void update_nocheck(int accepted) {
1176 accept_proportion *= nocheck_decay;
1177 accept_proportion += accepted * (1.0 - nocheck_decay);
1178 int new_nocheck= accept_proportion >= nocheck_thresh;
1179 if (new_nocheck && !nocheck_reported) {
1180 notice("entering nocheck mode for the first time");
1181 nocheck_reported= 1;
1182 } else if (new_nocheck != nocheck) {
1183 debug("nocheck mode %s", new_nocheck ? "start" : "stop");
1185 nocheck= new_nocheck;
1188 static void article_done(Conn *conn, Article *art, int whichcount) {
1189 art->ipf->counts[art->state][whichcount]++;
1190 if (whichcount == RC_accepted) update_nocheck(1);
1191 else if (whichcount == RC_unwanted) update_nocheck(0);
1193 InputFile *ipf= art->ipf;
1194 while (art->blanklen) {
1195 static const char spaces[]=
1200 int w= art->blanklen; if (w >= sizeof(spaces)) w= sizeof(spaces)-1;
1201 int r= pwrite(ipf->fd, spaces, w, art->offset);
1203 if (errno==EINTR) continue;
1204 sysdie("failed to blank entry for %s (length %d at offset %lu) in %s",
1205 art->messageid, art->blanklen, art->offset, ipf->path);
1207 assert(r>=0 && r<=w);
1213 assert(ipf->inprogress >= 0);
1215 if (!ipf->inprogress && ipf != main_input_file)
1216 queue_check_input_done();
1221 static void *peer_rd_ok(oop_source *lp, oop_read *oread, oop_event ev,
1222 const char *errmsg, int errnoval,
1223 const char *data, size_t recsz, void *conn_v) {
1226 if (ev == OOP_RD_EOF) {
1227 connfail(conn, "unexpected EOF from peer");
1228 return OOP_CONTINUE;
1230 assert(ev == OOP_RD_OK);
1232 char *sani= sanitise(data);
1235 unsigned long code= strtoul(data, &ep, 10);
1236 if (ep != data+3 || *ep != ' ' || data[0]=='0') {
1237 connfail(conn, "badly formatted response from peer: %s", sani);
1238 return OOP_CONTINUE;
1241 if (conn->quitting) {
1242 if (code!=205 && code!=503) {
1243 connfail(conn, "peer gave unexpected response to QUIT: %s", sani);
1245 notice("C%d idle connection closed\n");
1246 assert(!conn->waiting.count);
1247 assert(!conn->priority.count);
1248 assert(!conn->sent.count);
1249 assert(!conn->xmitu);
1250 LIST_REMOVE(conns,conn);
1253 return OOP_CONTINUE;
1258 #define GET_ARTICLE(musthavesent) \
1259 art= article_reply_check(conn, data, musthavesent, code_streaming, sani); \
1260 if (art) ; else return OOP_CONTINUE /* reply_check has failed the conn */
1262 #define ARTICLE_DEALTWITH(streaming,musthavesent,how) \
1263 code_streaming= (streaming); \
1264 GET_ARTICLE(musthavesent); \
1265 article_done(conn, art, RC_##how); break;
1267 #define PEERBADMSG(m) connfail(conn, m ": %s", sani); return OOP_CONTINUE
1269 int code_streaming= 0;
1273 case 400: PEERBADMSG("peer stopped accepting articles");
1274 case 503: PEERBADMSG("peer timed us out");
1275 default: PEERBADMSG("peer sent unexpected message");
1277 case 435: ARTICLE_DEALTWITH(0,0,unwanted); /* IHAVE says they have it */
1278 case 438: ARTICLE_DEALTWITH(1,0,unwanted); /* CHECK/TAKETHIS: they have it */
1280 case 235: ARTICLE_DEALTWITH(0,1,accepted); /* IHAVE says thanks */
1281 case 239: ARTICLE_DEALTWITH(1,1,accepted); /* TAKETHIS says thanks */
1283 case 437: ARTICLE_DEALTWITH(0,0,rejected); /* IHAVE says rejected */
1284 case 439: ARTICLE_DEALTWITH(1,0,rejected); /* TAKETHIS says rejected */
1286 case 238: /* CHECK says send it */
1288 case 335: /* IHAVE says send it */
1290 assert(art->state == art_Unchecked);
1291 art->ipf->counts[art->state][RC_accepted]++;
1292 art->state= art_Wanted;
1293 LIST_ADDTAIL(conn->priority, art);
1296 case 431: /* CHECK or TAKETHIS says try later */
1298 case 436: /* IHAVE says try later */
1301 if (fprintf(defer, "%s %s\n", TokenToText(art->token), art->messageid) <0
1303 sysfatal("write to defer file %s",path_defer);
1304 article_done(conn, art, RC_deferred);
1309 conn_maybe_write(conn);
1310 check_master_queue();
1311 return OOP_CONTINUE;
1315 /*========== monitoring of input files ==========*/
1317 static void feedfile_eof(InputFile *ipf) {
1318 assert(ipf != main_input_file); /* promised by tailing_try_read */
1320 inputfile_tailing_stop(ipf);
1321 assert(ipf->fd >= 0);
1322 if (close(ipf->fd)) sysdie("could not close input file %s", ipf->path);
1325 if (ipf == flushing_input_file) {
1326 assert(sms==sm_SEPARATED || sms==sm_DROPPING);
1327 if (main_input_file) inputfile_tailing_start(main_input_file);
1328 statemc_check_flushing_done();
1329 } else if (ipf == backlog_input_file) {
1330 statemc_check_backlog_done();
1332 abort(); /* supposed to wait rather than get EOF on main input file */
1336 static InputFile *open_input_file(const char *path) {
1337 int fd= open(path, O_RDONLY);
1339 if (errno==ENOENT) return 0;
1340 sysfatal("unable to open input file %s", path);
1343 InputFile *ipf= xmalloc(sizeof(*ipf) + strlen(path) + 1);
1344 memset(ipf,0,sizeof(*ipf));
1347 strcpy(ipf->path, path);
1352 static void close_input_file(InputFile *ipf) {
1353 assert(!ipf->readable_callback); /* must have had ->on_cancel */
1354 assert(!ipf->filemon); /* must have had inputfile_tailing_stop */
1355 assert(!ipf->rd); /* must have had inputfile_tailing_stop */
1356 assert(!ipf->inprogress); /* no dangling pointers pointing here */
1359 if (close(ipf->fd)) sysdie("could not close input file %s", ipf->path);
1363 /*---------- dealing with articles read in the input file ----------*/
1365 static void *feedfile_got_bad_data(InputFile *ipf, off_t offset,
1366 const char *data, const char *how) {
1367 warn("corrupted file: %s, offset %lu: %s: %s",
1368 ipf->path, (unsigned long)offset, how, sanitise(data));
1369 ipf->readcount_err++;
1370 if (ipf->readcount_err > max_bad_data_initial +
1371 (ipf->readcount_ok+ipf->readcount_blank) / max_bad_data_ratio)
1372 die("too much garbage in input file! (%d errs, %d ok, %d blank)",
1373 ipf->readcount_err, ipf->readcount_ok, ipf->readcount_blank);
1374 return OOP_CONTINUE;
1377 static void *feedfile_read_err(oop_source *lp, oop_read *rd,
1378 oop_rd_event ev, const char *errmsg,
1379 int errnoval, const char *data, size_t recsz,
1381 InputFile *ipf= ipf_v;
1382 assert(ev == OOP_RD_SYSTEM);
1384 sysdie("error reading input file: %s, offset %lu",
1385 ipf->path, (unsigned long)ipf->offset);
1388 static void *feedfile_got_article(oop_source *lp, oop_read *rd,
1389 oop_rd_event ev, const char *errmsg,
1390 int errnoval, const char *data, size_t recsz,
1392 InputFile *ipf= ipf_v;
1394 char tokentextbuf[sizeof(TOKEN)*2+3];
1396 if (!data) { feedfile_eof(ipf); return OOP_CONTINUE; }
1398 off_t old_offset= ipf->offset;
1399 ipf->offset += recsz + 1;
1401 #define X_BAD_DATA(m) return feedfile_got_bad_data(ipf,old_offset,data,m);
1403 if (ev==OOP_RD_PARTREC)
1404 feedfile_got_bad_data(ipf,old_offset,data,"missing final newline");
1405 /* but process it anyway */
1407 if (ipf->skippinglong) {
1408 if (ev==OOP_RD_OK) ipf->skippinglong= 0; /* fine now */
1411 if (ev==OOP_RD_LONG) {
1412 ipf->skippinglong= 1;
1413 X_BAD_DATA("overly long line");
1416 if (memchr(data,'\0',recsz)) X_BAD_DATA("nul byte");
1417 if (!recsz) X_BAD_DATA("empty line");
1420 if (strspn(data," ") != recsz) X_BAD_DATA("line partially blanked");
1421 ipf->readcount_blank++;
1422 return OOP_CONTINUE;
1425 char *space= strchr(data,' ');
1426 int tokenlen= space-data;
1427 int midlen= (int)recsz-tokenlen-1;
1428 if (midlen <= 2) X_BAD_DATA("no room for messageid");
1429 if (space[1]!='<' || space[midlen]!='>') X_BAD_DATA("invalid messageid");
1431 if (tokenlen != sizeof(TOKEN)*2+2) X_BAD_DATA("token wrong length");
1432 memcpy(tokentextbuf, data, tokenlen);
1433 tokentextbuf[tokenlen]= 0;
1434 if (!IsToken(tokentextbuf)) X_BAD_DATA("token wrong syntax");
1436 ipf->readcount_ok++;
1438 art= xmalloc(sizeof(*art) - 1 + midlen + 1);
1439 art->offset= ipf->offset;
1440 art->blanklen= recsz;
1441 art->midlen= midlen;
1442 art->state= art_Unchecked;
1443 art->ipf= ipf; ipf->inprogress++;
1444 art->token= TextToToken(tokentextbuf);
1445 strcpy(art->messageid, space+1);
1446 LIST_ADDTAIL(queue, art);
1448 if (sms==sm_NORMAL && ipf==main_input_file &&
1449 ipf->offset >= target_max_feedfile_size)
1450 statemc_start_flush("feed file size");
1452 check_master_queue();
1453 return OOP_CONTINUE;
1456 /*========== tailing input file ==========*/
1458 static void *tailing_rable_call_time(oop_source *loop, struct timeval tv,
1460 InputFile *ipf= user;
1461 return ipf->readable_callback(loop, &ipf->readable,
1462 ipf->readable_callback_user);
1465 static void tailing_on_cancel(struct oop_readable *rable) {
1466 InputFile *ipf= (void*)rable;
1468 if (ipf->filemon) filemon_stop(ipf);
1469 loop->cancel_time(loop, OOP_TIME_NOW, tailing_rable_call_time, ipf);
1470 ipf->readable_callback= 0;
1473 static void tailing_queue_readable(InputFile *ipf) {
1474 /* lifetime of ipf here is OK because destruction will cause
1475 * on_cancel which will cancel this callback */
1476 loop->on_time(loop, OOP_TIME_NOW, tailing_rable_call_time, ipf);
1479 static int tailing_on_readable(struct oop_readable *rable,
1480 oop_readable_call *cb, void *user) {
1481 InputFile *ipf= (void*)rable;
1483 tailing_on_cancel(rable);
1484 ipf->readable_callback= cb;
1485 ipf->readable_callback_user= user;
1488 tailing_queue_readable(ipf);
1492 static ssize_t tailing_try_read(struct oop_readable *rable, void *buffer,
1494 InputFile *ipf= (void*)rable;
1496 ssize_t r= read(ipf->fd, buffer, length);
1498 if (errno==EINTR) continue;
1502 if (ipf==main_input_file) {
1505 } else if (ipf==flushing_input_file) {
1507 assert(sms==sm_SEPARATED || sms==sm_DROPPING);
1508 } else if (ipf==backlog_input_file) {
1518 /*---------- filemon implemented with inotify ----------*/
1520 #if defined(HAVE_INOTIFY) && !defined(HAVE_FILEMON)
1521 #define HAVE_FILEMON
1523 #include <linux/inotify.h>
1525 static int filemon_inotify_fd;
1526 static int filemon_inotify_wdmax;
1527 static InputFile **filemon_inotify_wd2ipf;
1529 struct Filemon_Perfile {
1533 static void filemon_method_startfile(InputFile *ipf, Filemon_Perfile *pf) {
1534 int wd= inotify_add_watch(filemon_inotify_fd, ipf->path, IN_MODIFY);
1535 if (wd < 0) sysdie("inotify_add_watch %s", ipf->path);
1537 if (wd >= filemon_inotify_wdmax) {
1539 filemon_inotify_wd= xrealloc(filemon_inotify_wd2ipf,
1540 sizeof(*filemon_inotify_wd2ipf) * newmax);
1541 memset(filemon_inotify_wd2ipf + filemon_inotify_wdmax, 0,
1542 sizeof(*filemon_inotify_wd2ipf) * (newmax - filemon_inotify_wdmax));
1543 filemon_inotify_wdmax= newmax;
1546 assert(!filemon_inotify_wd2ipf[wd]);
1547 filemon_inotify_wd2ipf[wd]= ipf;
1549 debug("filemon inotify startfile %p wd=%d wdmax=%d",
1550 ipf, wd, filemon_inotify_wdmax);
1555 static void filemon_method_stopfile(InputFile *ipf, Filemon_Perfile *pf) {
1557 debug("filemon inotify stopfile %p wd=%d", ipf, wd);
1558 int r= inotify_rm_watch(filemon_inotify_fd, filemon_inotify_wd);
1559 if (r) sysdie("inotify_rm_watch");
1560 filemon_inotify_wd2ipf[wd]= 0;
1563 static void *filemon_inotify_readable(oop_source *lp, int fd,
1564 oop_event e, void *u) {
1565 struct inotify_event iev;
1567 int r= read(filemon_inotify_fd, &iev, sizeof(iev));
1569 if (errno==EAGAIN) break;
1570 sysdie("read from inotify master");
1571 } else if (r==sizeof(iev)) {
1572 assert(iev.wd >= 0 && iev.wd < filemon_inotify_wdmax);
1574 die("inotify read %d bytes wanted struct of %d", r, (int)sizeof(iev));
1576 InputFile *ipf= filemon_inotify_wd2ipf[iev.wd];
1577 debug("filemon inotify readable read %p wd=%p", iev.wd, ipf);
1578 filemon_callback(ipf);
1580 return OOP_CONTINUE;
1583 static int filemon_method_init(void) {
1584 filemon_inotify_fd= inotify_init();
1585 if (filemon_inotify_fd<0) {
1586 syswarn("could not initialise inotify: inotify_init failed");
1590 loop->on_fd(loop, filemon_inotify_fd, OOP_READ, filemon_inotify_readable);
1592 debug("filemon inotify init filemon_inotify_fd=%d", filemon_inotify_fd);
1596 #endif /* HAVE_INOTIFY && !HAVE_FILEMON */
1598 /*---------- filemon dummy implementation ----------*/
1600 #if !defined(HAVE_FILEMON)
1602 struct Filemon_Perfile { int dummy; };
1604 static int filemon_method_init(void) { return 0; }
1605 static void filemon_method_startfile(InputFile *ipf, Filemon_Perfile *pf) { }
1606 static void filemon_method_stopfile(InputFile *ipf, Filemon_Perfile *pf) { }
1608 #endif /* !HAVE_FILEMON */
1610 /*---------- filemon generic interface ----------*/
1612 static void filemon_start(InputFile *ipf) {
1613 assert(!ipf->filemon);
1615 ipf->filemon= xmalloc(sizeof(*ipf->filemon));
1616 memset(ipf->filemon, 0, sizeof(*ipf->filemon));
1617 filemon_method_startfile(ipf, ipf->filemon);
1620 static void filemon_stop(InputFile *ipf) {
1621 if (!ipf->filemon) return;
1622 filemon_method_stopfile(ipf, ipf->filemon);
1627 static void filemon_callback(InputFile *ipf) {
1628 ipf->readable_callback(loop, &ipf->readable, ipf->readable_callback_user);
1631 /*---------- interface to start and stop an input file ----------*/
1633 static const oop_rd_style feedfile_rdstyle= {
1634 OOP_RD_DELIM_STRIP, '\n',
1636 OOP_RD_SHORTREC_LONG,
1639 static void inputfile_tailing_start(InputFile *ipf) {
1641 ipf->readable.on_readable= tailing_on_readable;
1642 ipf->readable.on_cancel= tailing_on_cancel;
1643 ipf->readable.try_read= tailing_try_read;
1644 ipf->readable.delete_tidy= 0; /* we never call oop_rd_delete_{tidy,kill} */
1645 ipf->readable.delete_kill= 0;
1647 ipf->readable_callback= 0;
1648 ipf->readable_callback_user= 0;
1650 ipf->rd= oop_rd_new(loop, &ipf->readable, 0,0);
1653 int r= oop_rd_read(ipf->rd, &feedfile_rdstyle, MAX_LINE_FEEDFILE,
1654 feedfile_got_article,ipf, feedfile_read_err, ipf);
1655 if (r) sysdie("unable start reading feedfile %s",ipf->path);
1658 static void inputfile_tailing_stop(InputFile *ipf) {
1660 oop_rd_cancel(ipf->rd);
1661 oop_rd_delete(ipf->rd);
1663 assert(!ipf->filemon); /* we shouldn't be monitoring it now */
1667 /*========== interaction with innd - state machine ==========*/
1669 /* See official state diagram at top of file. We implement
1680 |`---------------------------------------------------.
1682 |`---------------- - - - |
1683 D ENOENT | D EXISTS see OVERALL STATES diagram |
1684 | for full startup logic |
1687 | ============ try to |
1693 | | F IS SO BIG WE SHOULD FLUSH, OR TIMEOUT |
1694 ^ | hardlink F to D |
1697 | | our handle onto F is now onto D |
1700 | |<-------------------<---------------------<---------+
1702 | | spawn inndcomm flush |
1704 | ================== |
1705 | FLUSHING[-ABSENT] |
1707 | main D tail/none |
1708 | ================== |
1710 | | INNDCOMM FLUSH FAILS ^
1711 | |`----------------------->----------. |
1713 | | NO SUCH SITE V |
1714 ^ |`--------------->----. ==================== |
1715 | | \ FLUSHFAILED[-ABSENT] |
1717 | | FLUSH OK \ main D tail/none |
1718 | | open F \ ==================== |
1720 | | \ | TIME TO RETRY |
1721 | |`------->----. ,---<---'\ `----------------'
1722 | | D NONE | | D NONE `----.
1724 | ============= V V ============
1725 | SEPARATED-1 | | DROPPING-1
1726 | flsh->fd>=0 | | flsh->fd>=0
1727 | [Separated] | | [Dropping]
1728 | main F idle | | main none
1729 | old D tail | | old D tail
1730 | ============= | | ============
1732 ^ | EOF ON D | | defer | EOF ON D
1734 | =============== | | ===============
1735 | SEPARATED-2 | | DROPPING-2
1736 | flsh->fd==-1 | V flsh->fd==-1
1737 | [Finishing] | | [Dropping]
1738 | main F tail | `. main none
1739 | old D closed | `. old D closed
1740 | =============== V `. ===============
1742 | | ALL D PROCESSED `. | ALL D PROCESSED
1743 | V install defer as backlog `. | install defer
1744 ^ | close D `. | close D
1745 | | unlink D `. | unlink D
1748 `----------' ==============
1768 static void startup_set_input_file(InputFile *f) {
1769 assert(!main_input_file);
1771 inputfile_tailing_start(f);
1774 static void statemc_init(void) {
1775 struct stat stab, stabf;
1777 path_lock= xasprintf("%s_lock", feedfile);
1778 path_flushing= xasprintf("%s_flushing", feedfile);
1779 path_defer= xasprintf("%s_defer", feedfile);
1780 globpat_backlog= xasprintf("%s_backlog*", feedfile);
1783 int lockfd= open(path_lock, O_CREAT|O_RDWR, 0600);
1784 if (lockfd<0) sysfatal("open lockfile %s", path_lock);
1787 memset(&fl,0,sizeof(fl));
1789 fl.l_whence= SEEK_SET;
1790 int r= fcntl(lockfd, F_SETLK, &fl);
1792 if (errno==EACCES || errno==EAGAIN) {
1793 if (quiet_multiple) exit(0);
1794 fatal("another duct holds the lockfile");
1796 sysdie("fcntl F_SETLK lockfile %s", path_lock);
1799 xfstat_isreg(lockfd, &stabf, path_lock, "lockfile");
1801 xlstat_isreg(path_lock, &stab, &lock_noent, "lockfile");
1803 if (!lock_noent && samefile(&stab, &stabf))
1807 sysdie("could not close stale lockfile %s", path_lock);
1809 debug("startup: locked");
1811 search_backlog_file();
1814 xlstat_isreg(path_defer, &stab, &defer_noent, "defer file");
1816 debug("startup: ductdefer ENOENT");
1818 debug("startup: ductdefer nlink=%ld", (long)stab.st_nlink);
1819 switch (stab.st_nlink==1) {
1821 open_defer(); /* so that we will later close it and rename it */
1824 xunlink(path_defer, "stale defer file link"
1825 " (presumably hardlink to backlog file)");
1828 die("defer file %s has unexpected link count %d",
1829 path_defer, stab.st_nlink);
1833 struct stat stab_f, stab_d;
1836 InputFile *file_d= open_input_file(path_flushing);
1837 if (file_d) xfstat_isreg(file_d->fd, &stab_d, path_flushing,"flushing file");
1839 xlstat_isreg(feedfile, &stab_f, &noent_f, "feedfile");
1841 if (!noent_f && file_d && samefile(&stab_f, &stab_d)) {
1842 debug("startup: F==D => Hardlinked");
1843 xunlink(feedfile, "feed file (during startup)"); /* => Moved */
1848 debug("startup: F ENOENT => Moved");
1849 if (file_d) startup_set_input_file(file_d);
1850 spawn_inndcomm_flush("feedfile missing at startup");
1851 /* => Flushing, sms:=FLUSHING */
1854 debug("startup: F!=D => Separated");
1855 startup_set_input_file(file_d);
1856 SMS(SEPARATED, 0, "found both old and current feed files");
1858 debug("startup: F exists, D ENOENT => Normal");
1859 InputFile *file_f= open_input_file(feedfile);
1860 if (!file_f) die("feed file vanished during startup");
1861 startup_set_input_file(file_f);
1862 SMS(NORMAL, flushfail_retry_periods, "normal startup");
1867 static void statemc_start_flush(const char *why) { /* Normal => Flushing */
1868 assert(sms == sm_NORMAL);
1870 debug("starting flush (%s) (%lu >?= %lu) (%d)",
1872 (unsigned long)(main_input_file ? main_input_file->offset : 0),
1873 (unsigned long)target_max_feedfile_size,
1876 int r= link(feedfile, path_flushing);
1877 if (r) sysdie("link feedfile %s to flushing file %s",
1878 feedfile, path_flushing);
1881 xunlink(feedfile, "old feedfile link");
1884 spawn_inndcomm_flush(why); /* => Flushing FLUSHING */
1887 static void statemc_period_poll(void) {
1888 if (!sm_period_counter) return;
1889 sm_period_counter--;
1890 assert(sm_period_counter>=0);
1892 if (sm_period_counter) return;
1895 statemc_start_flush("periodic"); /* Normal => Flushing; => FLUSHING */
1897 case sm_FLUSHFAILED:
1898 spawn_inndcomm_flush("retry"); /* Moved => Flushing; => FLUSHING */
1905 static int inputfile_is_done(InputFile *ipf) {
1907 if (ipf->inprogress) return 0; /* new article in the meantime */
1908 if (ipf->fd >= 0); return 0; /* not had EOF */
1912 static void notice_processed(InputFile *ipf, const char *what,
1914 #define RCI_NOTHING(x) /* nothing */
1915 #define RCI_TRIPLE_FMT(x) " " #x "=" RCI_TRIPLE_FMT_BASE
1916 #define RCI_TRIPLE_VALS(x) , RCI_TRIPLE_VALS_BASE(ipf->counts, [RC_##x])
1918 #define CNT(art,rc) (ipf->counts[art_##art][RC_##rc])
1920 info("processed %s%s read=%d(+%dbl,+%derr)"
1921 " offered=%d(ch%d,nc%d) accepted=%d(ch%d+nc%d)"
1922 RESULT_COUNTS(RCI_NOTHING, RCI_TRIPLE_FMT)
1925 ipf->readcount_ok, ipf->readcount_blank, ipf->readcount_err,
1926 CNT(Unchecked,sent) + CNT(Unsolicited,sent)
1927 , CNT(Unchecked,sent), CNT(Unsolicited,sent),
1928 CNT(Wanted,accepted) + CNT(Unsolicited,accepted)
1929 , CNT(Wanted,accepted), CNT(Unsolicited,accepted)
1930 RESULT_COUNTS(RCI_NOTHING, RCI_TRIPLE_VALS)
1936 static void statemc_check_backlog_done(void) {
1937 InputFile *ipf= backlog_input_file;
1938 if (!inputfile_is_done(ipf)) return;
1940 const char *slash= strrchr(ipf->path, '/');
1941 const char *leaf= slash ? slash+1 : ipf->path;
1942 const char *under= strchr(slash, '_');
1943 const char *rest= under ? under+1 : leaf;
1944 if (!strncmp(rest,"backlog",7)) rest += 7;
1945 notice_processed(ipf,"backlog:",rest);
1947 close_input_file(ipf);
1948 if (unlink(ipf->path)) {
1949 if (errno != ENOENT)
1950 sysdie("could not unlink processed backlog file %s", ipf->path);
1951 warn("backlog file %s vanished while we were reading it"
1952 " so we couldn't remove it (but it's done now, anyway)",
1956 backlog_input_file= 0;
1957 search_backlog_file();
1961 static void statemc_check_flushing_done(void) {
1962 InputFile *ipf= flushing_input_file;
1963 if (!inputfile_is_done(ipf)) return;
1965 assert(sms==sm_SEPARATED || sms==sm_DROPPING);
1967 notice_processed(ipf,"feedfile",0);
1971 xunlink(path_flushing, "old flushing file");
1973 close_input_file(flushing_input_file);
1974 free(flushing_input_file);
1975 flushing_input_file= 0;
1977 if (sms==sm_SEPARATED) {
1978 notice("flush complete");
1979 SMS(NORMAL, 0, "flush complete");
1980 } else if (sms==sm_DROPPING) {
1981 SMS(DROPPED, 0, "old flush complete");
1982 search_backlog_file();
1983 notice("feed dropped, but will continue until backlog is finished");
1987 static void *statemc_check_input_done(oop_source *lp, struct timeval now,
1989 assert(!inputfile_is_done(main_input_file));
1990 statemc_check_flushing_done();
1991 statemc_check_backlog_done();
1992 return OOP_CONTINUE;
1995 static void queue_check_input_done(void) {
1996 loop->on_time(loop, OOP_TIME_NOW, statemc_check_input_done, 0);
1999 static void statemc_setstate(StateMachineState newsms, int periods,
2000 const char *forlog, const char *why) {
2002 sm_period_counter= periods;
2004 const char *xtra= "";
2006 case sm_FLUSHING: sm_FLUSHFAILED:
2007 if (!main_input_file) xtra= "-ABSENT";
2009 case sm_SEPARATED: case sm_DROPPING:
2010 xtra= flushing_input_file->fd >= 0 ? "-1" : "-2";
2016 info("%s%s[%d] %s",forlog,xtra,periods,why);
2018 info("%s%s %s",forlog,xtra,why);
2022 /*---------- defer and backlog files ----------*/
2024 static void open_defer(void) {
2029 defer= fopen(path_defer, "a+");
2030 if (!defer) sysfatal("could not open defer file %s", path_defer);
2032 /* truncate away any half-written records */
2034 xfstat_isreg(fileno(defer), &stab, path_defer, "newly opened defer file");
2036 if (stab.st_size > LONG_MAX)
2037 die("defer file %s size is far too large", path_defer);
2042 long orgsize= stab.st_size;
2043 long truncto= stab.st_size;
2045 if (!truncto) break; /* was only (if anything) one half-truncated record */
2046 if (fseek(defer, truncto-1, SEEK_SET) < 0)
2047 sysdie("seek in defer file %s while truncating partial", path_defer);
2052 sysdie("failed read from defer file %s", path_defer);
2054 die("defer file %s shrank while we were checking it!", path_defer);
2060 if (stab.st_size != truncto) {
2061 warn("truncating half-record at end of defer file %s -"
2062 " shrinking by %ld bytes from %ld to %ld",
2063 path_defer, orgsize - truncto, orgsize, truncto);
2066 sysfatal("could not flush defer file %s", path_defer);
2067 if (ftruncate(fileno(defer), truncto))
2068 sysdie("could not truncate defer file %s", path_defer);
2071 info("continuing existing defer file %s (%ld bytes)",
2072 path_defer, orgsize);
2074 if (fseek(defer, truncto, SEEK_SET))
2075 sysdie("could not seek to new end of defer file %s", path_defer);
2078 static void close_defer(void) {
2082 xfstat(fileno(defer), &stab, path_defer, "defer file");
2084 if (fclose(defer)) sysfatal("could not close defer file %s", path_defer);
2087 time_t now= time(0);
2088 if (now==-1) sysdie("time(2) failed");
2090 char *backlog= xasprintf("%s_backlog_%lu.%lu", feedfile,
2092 (unsigned long)stab.st_ino);
2093 if (link(path_defer, backlog))
2094 sysfatal("could not install defer file %s as backlog file %s",
2095 path_defer, backlog);
2096 if (unlink(path_defer))
2097 sysdie("could not unlink old defer link %s to backlog file %s",
2098 path_defer, backlog);
2102 if (until_backlog_nextscan < 0 ||
2103 until_backlog_nextscan > backlog_retry_minperiods + 1)
2104 until_backlog_nextscan= backlog_retry_minperiods + 1;
2107 static void poll_backlog_file(void) {
2108 if (until_backlog_nextscan < 0) return;
2109 if (until_backlog_nextscan-- > 0) return;
2110 search_backlog_file();
2113 static void search_backlog_file(void) {
2114 /* returns non-0 iff there are any backlog files */
2119 const char *oldest_path=0;
2120 time_t oldest_mtime, now;
2122 if (backlog_input_file) return 3;
2126 r= glob(globpat_backlog, GLOB_ERR|GLOB_MARK|GLOB_NOSORT, 0, &gl);
2130 sysdie("failed to expand backlog pattern %s", globpat_backlog);
2132 die("out of memory expanding backlog pattern %s", globpat_backlog);
2134 for (i=0; i<gl.gl_pathc; i++) {
2135 const char *path= gl.gl_pathv[i];
2137 if (strchr(path,'#') || strchr(path,'~')) {
2138 debug("backlog file search skipping %s", path);
2141 r= stat(path, &stab);
2143 syswarn("failed to stat backlog file %s", path);
2146 if (!S_ISREG(stab.st_mode)) {
2147 warn("backlog file %s is not a plain file (or link to one)", path);
2150 if (!oldest_path || stab.st_mtime < oldest_mtime) {
2152 oldest_mtime= stab.st_mtime;
2155 case GLOB_NOMATCH: /* fall through */
2158 sysdie("glob expansion of backlog pattern %s gave unexpected"
2159 " nonzero (error?) return value %d", globpat_backlog, r);
2165 debug("backlog scan: none");
2167 if (sms==sm_DROPPED) {
2168 notice("feed dropped and our work is complete");
2169 xunlink(path_lock, "lockfile for old feed");
2172 until_backlog_nextscan= backlog_spontaneous_rescan_periods;
2176 now= time(); if (now==-1) sysdie("time(2) failed");
2177 double age= difftime(now, oldest_mtime);
2178 long age_deficiency= (backlog_retry_minperiods * PERIOD_SECONDS) - age;
2180 if (age_deficiency <= 0) {
2181 debug("backlog scan: found age=%f deficiency=%ld oldest=%s",
2182 age, age_deficiency, oldest_path);
2184 backlog_input_file= open_input_file(oldest_path);
2185 if (!backlog_input_file) {
2186 warn("backlog file %s vanished as we opened it", backlog_input_file);
2189 inputfile_tailing_start(backlog_input_file);
2190 until_backlog_nextscan= -1;
2194 until_backlog_nextscan= age_deficiency / PERIOD_SECONDS;
2196 if (backlog_spontaneous_rescan_periods >= 0 &&
2197 until_backlog_nextscan > backlog_spontaneous_rescan_periods)
2198 until_backlog_nextscan= backlog_spontaneous_rescan_periods;
2200 debug("backlog scan: young age=%f deficiency=%ld nextscan=%d oldest=%s",
2201 age, age_deficiency, until_backlog_nextscan, oldest_path);
2205 /*========== flushing the feed ==========*/
2207 static pid_t inndcomm_child;
2209 static void *inndcomm_event(oop_source *lp, int fd, oop_event e, void *u) {
2210 assert(inndcomm_child);
2211 int status= xwaitpid(&inndcomm_child, "inndcomm");
2212 loop->cancel_fd(fd);
2215 assert(!flushing_input_file);
2217 if (WIFEXITED(status)) {
2218 switch (WEXITSTATUS(status)) {
2220 case INNDCOMMCHILD_ESTATUS_FAIL:
2223 case INNDCOMMCHILD_ESTATUS_NONESUCH:
2224 warn("feed has been dropped by innd, finishing up");
2225 flushing_input_file= main_input_file;
2226 tailing_queue_readable(flushing_input_file);
2227 /* we probably previously returned EAGAIN from our fake read method
2228 * when in fact we were at EOF, so signal another readable event
2229 * so we actually see the EOF */
2233 if (flushing_input_file) {
2234 SMS(DROPPING, 0, "feed dropped by innd, but must finish last flush");
2237 SMS(DROPPED, 0, "feed dropped by innd");
2238 search_backlog_file();
2240 return OOP_CONTINUE;
2244 flushing_input_file= main_input_file;
2245 tailing_queue_readable(flushing_input_file);
2247 main_input_file= open_input_file(feedfile);
2248 if (!main_input_file)
2249 die("flush succeeded but feedfile %s does not exist!", feedfile);
2251 if (flushing_input_file) {
2252 SMS(SEPARATED, spontaneous_flush_periods, "recovery flush complete");
2255 SMS(NORMAL, spontaneous_flush_periods, "flush complete");
2257 return OOP_CONTINUE;
2260 goto unexpected_exitstatus;
2263 } else if (WIFSIGNALED(status) && WTERMSIG(status) == SIGALRM) {
2264 warn("flush timed out trying to talk to innd");
2267 unexpected_exitstatus:
2268 report_child_status("inndcomm child", status);
2272 SMS(FLUSHFAILED, flushfail_retry_periods, "flush failed, will retry");
2275 static void inndcommfail(const char *what) {
2276 syswarn("error communicating with innd: %s failed: %s", what, ICCfailure);
2277 exit(INNDCOMMCHILD_ESTATUS_FAIL);
2280 void spawn_inndcomm_flush(const char *why) { /* Moved => Flushing */
2283 notice("flushing %s",why);
2285 assert(sms==sm_NORMAL || sms==sm_FLUSHFAILED);
2286 assert(!inndcomm_child);
2288 if (pipe(pipefds)) sysdie("create pipe for inndcomm child sentinel");
2290 inndcomm_child= xfork();
2292 if (!inndcomm_child) {
2293 static char flushargv[2]= { sitename, 0 };
2298 alarm(inndcomm_flush_timeout);
2299 r= ICCopen(); if (r) inndcommfail("connect");
2300 r= ICCcommand('f',flushargv,&reply); if (r<0) inndcommfail("transmit");
2301 if (!r) exit(0); /* yay! */
2303 if (!strcmp(reply, "1 No such site")) exit(INNDCOMMCHILD_ESTATUS_NONESUCH);
2304 syswarn("innd ctlinnd flush failed: innd said %s", reply);
2305 exit(INNDCOMMCHILD_ESTATUS_FAIL);
2309 int sentinel_fd= pipefds[0];
2310 on_fd_read_except(sentinel_fd, inndcomm_event);
2312 SMS(FLUSHING, 0, why);
2315 /*========== main program ==========*/
2317 static void postfork_inputfile(InputFile *ipf) {
2319 assert(ipf->fd >= 0);
2324 static void postfork_stdio(FILE *f) {
2325 /* we have no stdio streams that are buffered long-term */
2329 static void postfork(const char *what) {
2330 if (signal(SIGPIPE, SIG_DFL) == SIG_ERR)
2331 sysdie("%s child: failed to reset SIGPIPE");
2333 postfork_inputfile(main_input_file);
2334 postfork_inputfile(flushing_input_file);
2337 for (conn=LIST_HEAD(conns); conn; conn=LIST_NEXT(conn))
2340 postfork_stdio(defer);
2343 #define EVERY(what, interval, body) \
2344 static const struct timeval what##_timeout = { 5, 0 }; \
2345 static void what##_schedule(void); \
2346 static void *what##_timedout(oop_source *lp, struct timeval tv, void *u) { \
2348 what##_schedule(); \
2350 static void what##_schedule(void) { \
2351 loop->on_time(loop, what##_timeout, what##_timedout, 0); \
2354 EVERY(filepoll, {5,0}, {
2355 if (main_input_file && main_input_file->readable_callback)
2356 filemon_callback(main_input_file);
2359 #define DEBUGF_IPF(wh) " " #wh "=%p/%s:ip=%ld,off=%ld,fd=%d%s" \
2360 #define DEBUG_IPF(sh) \
2361 wh##_input_file, debug_ipf_path(wh##_input_file), \
2362 wh##_input_file->inprogress, (long)wh##_input_file->offset, \
2363 wh##_input_file->fd, wh##_input_file->rd ? "+" : ""
2364 static const char *debug_ipf_path(InputFile *ipf) {
2365 char *slash= strrchr(ipf->path,'/');
2366 return slash ? slash+1 : ipf->path;
2369 EVERY(period, {PERIOD_SECONDS,0}, {
2371 " sms=%s[%d] conns=%d queue=%d until_connect=%d"
2372 " input_files" DEBUGF_IPF(main) DEBUGF_IPF(old) DEBUGF_FMT(flushing)
2373 " children connecting=%ld inndcomm_child"
2375 sms_names[sms], sm_period_counter,
2376 queue.count, conns.count, until_connect,
2377 DEBUG_IPF(main), DEBUG_IPF(flushing), DEBUG_IPF(flushing),
2378 (long)connecting_child, (long)inndcomm_child
2381 if (until_connect) until_connect--;
2383 poll_backlog_file();
2384 if (!backlog_input_file) close_defer(); /* want to start on a new backlog */
2385 statemc_period_poll();
2386 check_master_queue();
2390 /*========== option parsing ==========*/
2393 of_seconds= 001000u;
2394 of_boolean= 002000u;
2397 typedef struct Option Option;
2398 typedef void OptionParser(const Option*, const char *val);
2408 void op_integer(const Option *o, const char *val) {
2411 unsigned long ul= strtoul(val,&ep,10);
2412 if (*ep || ep==val || errno || ul>INT_MAX)
2413 badusage("bad integer value for %s",o->long);
2414 int *store= o->store;
2418 void op_double(const Option *o, const char *val) {
2419 int *store= o->store;
2422 *store= strtod(val, &ep);
2423 if (*ep || ep==val || errno)
2424 badusage("bad floating point value for %s",o->long);
2427 void op_string(const Option *o, const char *val) {
2428 char **store= o->store;
2433 void op_seconds(const Option *o, const char *val) {
2434 int *store= o->store;
2437 double v= strtod(val,&ep);
2438 if (ep==val) badusage("bad time/duration value for %s",o->long);
2440 if (!*ep || !strcmp(ep,"s")) unit= 1;
2441 else if (!strcmp(ep,"m")) unit= 60;
2442 else if (!strcmp(ep,"h")) unit= 3600;
2443 else if (!strcmp(ep,"d")) unit= 86400;
2444 else badusage("bad units %s for time/duration value for %s",ep,o->long);
2448 if (v > INT_MAX) badusage("time/duration value for %s out of range",o->long);
2452 void op_periods_rndup(const Option *o, const char *val) {
2453 int *store= o->store;
2455 *store += PERIOD_SECONDS-1;
2456 *store /= PERIOD_SECONDS;
2459 void op_periods_booltrue(const Option *o, const char *val) {
2460 int *store= o->store;
2463 void op_periods_boolfalse(const Option *o, const char *val) {
2464 int *store= o->store;
2468 static const Option options[]= {
2469 {'f',"feedfile", &feedfile, op_string },
2470 {'q',"quiet-multiple", &quiet_multiple, op_booltrue, 1 },
2472 { 0, "max-connections", &max_connections op_integer },
2473 { 0, "max-queue-per-conn", &max_queue_per_conn op_integer },
2476 { 0, "streaming", &try_stream, op_booltrue, 1 },
2477 { 0, "no-streaming", &try_stream, op_boolfalse, 1 },
2478 {'P',"port", &port op_integer },
2479 { 0, "inndconf", &inndconffile, op_string },
2480 {'d',"daemon", &become_daemon, op_booltrue, 1 },
2481 { 0, "no-daemon", &become_daemon, op_boolfalse, 1 },
2483 { 0, "no-check-proportion", &nocheck_thresh_pct, op_double },
2484 { 0, "no-check-filter", &nocheck_decay_articles, op_double },
2486 { 0, "reconnect-interval", &reconnect_delay_periods, op_periods_rndup },
2487 { 0, "flush-retry-interval", &flushfail_retry_periods, op_periods_rndup },
2488 { 0, "connection-timeout", &connection_timeout, op_seconds },
2489 { 0, "inndcomm-timeout", &inndcomm_flush_timeout, op_seconds },
2492 int main(int argc, char **argv) {
2498 if (*arg != '-') break;
2499 if (!strcmp(arg,"--")) { arg= *++argv; break; }
2501 while ((a= *++arg)) {
2505 char *equals= strchr(arg,'=');
2506 int len= equals ? (equals - arg) : strlen(arg);
2507 for (o=options; o->long; o++)
2508 if (strlen(o->long) == len && !memcmp(o->long,arg,len))
2510 badusage("unknown long option --%s",arg);
2513 if (equals) badusage("option --%s does not take a value",o->long);
2515 } else if (equals) {
2519 if (!arg) badusage("option --%s needs a value",o->long);
2522 break; /* eaten the whole argument now */
2524 for (o=options; o->long; o++)
2527 badusage("unknown short option -%c",a);
2534 if (!arg) badusage("option -%c needs a value",o->short);
2537 break; /* eaten the whole argument now */
2542 if (!arg) badusage("need site name argument");
2548 if (*++argv) badusage("too many non-option arguments");
2550 if (nocheck_thresh_pct < 0 || nocheck_thresh_pct > 100)
2551 badusage("nocheck threshold percentage must be between 0..100");
2552 nocheck_thresh= nocheck_thresh_pct * 0.01;
2554 if (nocheck_decay_articles < 0.1)
2555 badusage("nocheck decay articles must be at least 0.1");
2556 nocheck_decay= 1 - 1/nocheck_decay_articles;
2559 pathoutgoing= innconf->pathoutgoing;
2560 innconf_read(inndconffile);
2563 feedfile= xasprintf("%s/%s",pathoutgoing,sitename);
2564 else if (!feedfile[0])
2565 badusage("feed filename must be nonempty");
2566 else if (feedfile[strlen(feedfile)-1]=='/')
2567 feedfile= xasprintf("%s%s",feedfile,sitename);
2569 const char *feedfile_forbidden= "?*[~#";
2571 while ((c= *feedfile_forbidden++))
2572 if (strchr(feedfile, c))
2573 badusage("feed filename may not contain metacharacter %c",c);
2575 loop= oop_sys_new();
2576 if (!loop) sysdie("could not create liboop event loop");
2578 if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
2579 sysdie("could not ignore SIGPIPE");
2581 if (become_daemon) {
2582 for (i=3; i<255; i++)
2583 /* do this now before we open syslog, etc. */
2585 openlog("innduct",LOG_NDELAY|LOG_PID,LOG_NEWS);
2587 int null= open("/dev/null",O_RDWR);
2588 if (null<0) sysdie("failed to open /dev/null");
2594 pid_t child1= xfork("daemonise first fork");
2595 if (child1) _exit(0);
2597 pid_t sid= setsid();
2598 if (sid != child1) sysdie("setsid failed");
2600 pid_t child2= xfork("daemonise second fork");
2601 if (child2) _exit(0);
2606 if (!filemon_init()) {
2607 warn("no file monitoring available, polling");
2608 filepoll_schedule();