3 * tailing reliable realtime streaming feeder for inn
5 * Copyright (C) 2010 Ian Jackson <ijackson@chiark.greenend.org.uk>
7 * This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
20 * (I believe that when you compile and link this as part of the inn2
21 * build, with the Makefile runes I have provided, all the libraries
22 * and files which end up included in innduct are licence-compatible
23 * with GPLv3. If not then please let me know. -Ian Jackson.)
27 * Newsfeeds file entries should look like this:
28 * host.name.of.site[/exclude,exclude,...]\
29 * :pattern,pattern...[/distribution,distribution...]\
33 * sitename[/exclude,exclude,...]\
34 * :pattern,pattern...[/distribution,distribution...]\
40 * or might be blanked out
41 * <spc><spc><spc><spc>....
43 * F site.name main feed file
44 * opened/created, then written, by innd
47 * tokens blanked out by duct when processed
48 * site.name_lock lock preventing multiple ducts
49 * to hold lock must open,F_SETLK[W]
50 * and then stat to check that locked file
51 * still has name site.name_lock
52 * holder of this lock is "duct"
53 * (only) lockholder may remove the lockfile
54 * D site.name_flushing temporary feed file during flush (or crash)
55 * hardlink created by duct
57 * site.name_defer 431'd articles, still being written,
58 * created, written, used by duct
60 * site.name_backlog.<date>.<inum>
61 * 431'd articles, ready for innxmit or duct
62 * created (link/mv) by duct
63 * site.name_backlog<anything-else> (where <anything-else> does not
64 * contain '#' or '~') eg
65 * site.name_backlog.manual
66 * anything the sysadmin likes (eg, feed files
67 * from old feeds to be merged into this one)
68 * created (link/mv) by admin
69 * may be symlinks (in which case links
70 * may be written through, but only links
73 * It is safe to remove backlog files manually,
74 * if it's desired to throw away the backlog.
76 * Backlog files are also processed by innduct. We find the oldest
77 * backlog file which is at least a certain amount old, and feed it
78 * back into our processing. When every article in it has been read
79 * and processed, we unlink it and look for another backlog file.
81 * If we don't have a backlog file that we're reading, we close the
82 * defer file that we're writing and make it into a backlog file at
83 * the first convenient opportunity.
94 | | <----------------<---------------------------------'|
100 | F: innd writing, duct reading |
103 | | duct decides time to flush |
104 | | duct makes hardlink |
106 | V <------------------------'|
108 | F == D: innd writing, duct reading both exist |
111 | | <-----------<-------------<--'|
112 | | open D F ENOENT |
115 | V <---------------------. |
118 | D: innd writing, duct reading; or ENOENT | |
120 | | duct requests flush of feed | |
121 | | (others can too, harmlessly) | |
125 | D: innd flushing, duct; or ENOENT | |
127 | | inndcomm flush fails | |
128 | |`-------------------------->------------------' |
130 | | inndcomm reports no such site |
131 | |`---------------------------------------------------- | -.
133 | | innd finishes writing D, creates F | |
134 | | inndcomm reports flush successful | |
137 | Separated <----------------' |
138 | F: innd writing F!=D /
139 | D: duct reading; or ENOENT both exist /
141 | | duct gets to the end of D /
142 | | duct opens F too /
145 | F: innd writing, duct reading |
146 | D: duct finishing V
148 | | duct finishes processing D F: ENOENT
149 | V duct unlinks D D: duct reading
151 `--<--' | duct finishes
161 "duct reading" means innduct is reading the file but also
162 overwriting processed tokens.
166 * rune for printing diagrams:
168 perl -ne 'print if m/-8\<-/..m/-\>8-/; print "\f" if m/-\^L-/' backends/innduct.c |a2ps -R -B -ops
173 /*============================== PROGRAM ==============================*/
175 #define _GNU_SOURCE 1
181 #include "inndcomm.h"
183 #include "inn/list.h"
184 #include "inn/innconf.h"
185 #include "inn/messages.h"
188 #include <sys/types.h>
189 #include <sys/wait.h>
190 #include <sys/stat.h>
191 #include <sys/socket.h>
210 #include <oop-read.h>
212 /*----- general definitions, probably best not changed -----*/
214 #define CONNCHILD_ESTATUS_STREAM 24
215 #define CONNCHILD_ESTATUS_NOSTREAM 25
217 #define INNDCOMMCHILD_ESTATUS_FAIL 26
218 #define INNDCOMMCHILD_ESTATUS_NONESUCH 27
220 #define MAX_LINE_FEEDFILE (NNTP_MSGID_MAXLEN + sizeof(TOKEN)*2 + 10)
221 #define MAX_CLI_COMMAND 1000
223 #define VA va_list al; va_start(al,fmt)
224 #define PRINTF(f,a) __attribute__((__format__(printf,f,a)))
225 #define NORET_PRINTF(f,a) __attribute__((__noreturn__,__format__(printf,f,a)))
226 #define NORET __attribute__((__noreturn__))
228 #define NEW(ptr) ((ptr)= zxmalloc(sizeof(*(ptr))))
229 #define NEW_DECL(type,ptr) type ptr = zxmalloc(sizeof(*(ptr)))
231 #define DUMPV(fmt,pfx,v) fprintf(f, " " #v "=" fmt, pfx v);
233 #define FOR_CONN(conn) \
234 for ((conn)=LIST_HEAD(conns); (conn); (conn)=LIST_NEXT((conn)))
236 /*----- doubly linked lists -----*/
238 #define ISNODE(T) struct node list_node
241 union { struct list li; T *for_type; } u; \
245 #define NODE(n) (assert((void*)&(n)->list_node == (n)), &(n)->list_node)
247 #define LIST_CHECKCANHAVENODE(l,n) \
248 ((void)((n) == ((l).u.for_type))) /* just for the type check */
250 #define LIST_ADDSOMEHOW(l,n,list_addsomehow) \
251 ( LIST_CHECKCANHAVENODE(l,n), \
252 list_addsomehow(&(l).u.li, NODE((n))), \
256 #define LIST_REMSOMEHOW(l,list_remsomehow) \
257 ( (typeof((l).u.for_type)) \
260 list_remsomehow(&(l).u.li) ) \
266 #define LIST_ADDHEAD(l,n) LIST_ADDSOMEHOW((l),(n),list_addhead)
267 #define LIST_ADDTAIL(l,n) LIST_ADDSOMEHOW((l),(n),list_addtail)
268 #define LIST_REMHEAD(l) LIST_REMSOMEHOW((l),list_remhead)
269 #define LIST_REMTAIL(l) LIST_REMSOMEHOW((l),list_remtail)
271 #define LIST_INIT(l) ((l).count=0, list_new(&(l).u.li))
272 #define LIST_HEAD(l) ((typeof((l).u.for_type))(list_head((struct list*)&(l))))
273 #define LIST_NEXT(n) ((typeof(n))list_succ(NODE((n))))
274 #define LIST_BACK(n) ((typeof(n))list_pred(NODE((n))))
276 #define LIST_REMOVE(l,n) \
277 ( LIST_CHECKCANHAVENODE(l,n), \
278 list_remove(NODE((n))), \
282 #define LIST_INSERT(l,n,pred) \
283 ( LIST_CHECKCANHAVENODE(l,n), \
284 LIST_CHECKCANHAVENODE(l,pred), \
285 list_insert((struct list*)&(l), NODE((n)), NODE((pred))), \
289 /*----- type predeclarations -----*/
291 typedef struct Conn Conn;
292 typedef struct Article Article;
293 typedef struct InputFile InputFile;
294 typedef struct XmitDetails XmitDetails;
295 typedef struct Filemon_Perfile Filemon_Perfile;
296 typedef enum StateMachineState StateMachineState;
297 typedef struct CliCommand CliCommand;
302 /*----- function predeclarations -----*/
304 static void conn_maybe_write(Conn *conn);
305 static void conn_make_some_xmits(Conn *conn);
306 static void *conn_write_some_xmits(Conn *conn);
308 static void xmit_free(XmitDetails *d);
310 #define SMS(newstate, periods, why) \
311 (statemc_setstate(sm_##newstate,(periods),#newstate,(why)))
312 static void statemc_setstate(StateMachineState newsms, int periods,
313 const char *forlog, const char *why);
315 static void statemc_start_flush(const char *why); /* Normal => Flushing */
316 static void spawn_inndcomm_flush(const char *why); /* Moved => Flushing */
317 static int trigger_flush_ok(const char *why /* 0 means timeout */);
318 /* => Flushing,FLUSHING, ret 1; or ret 0 */
320 static void article_done(Article *art, int whichcount);
322 static void check_assign_articles(void);
323 static void queue_check_input_done(void);
324 static void check_reading_pause_resume(InputFile *ipf);
326 static void statemc_check_flushing_done(void);
327 static void statemc_check_backlog_done(void);
329 static void postfork(void);
330 static void period(void);
332 static void open_defer(void);
333 static void close_defer(void);
334 static void search_backlog_file(void);
335 static void preterminate(void);
336 static void raise_default(int signo) NORET;
338 static void inputfile_reading_start(InputFile *ipf);
339 static void inputfile_reading_stop(InputFile *ipf);
340 static void inputfile_reading_pause(InputFile *ipf);
341 static void inputfile_reading_resume(InputFile *ipf);
342 /* pause and resume are idempotent, and no-op if not done _reading_start */
344 static void filemon_start(InputFile *ipf);
345 static void filemon_stop(InputFile *ipf);
346 static void tailing_make_readable(InputFile *ipf);
348 static void vconnfail(Conn *conn, const char *fmt, va_list al) PRINTF(2,0);
349 static void connfail(Conn *conn, const char *fmt, ...) PRINTF(2,3);
351 static const oop_rd_style peer_rd_style;
352 static oop_rd_call peer_rd_err, peer_rd_ok;
355 /*----- configuration options -----*/
356 /* when changing defaults, remember to update the manpage */
358 static const char *sitename, *remote_host;
359 static const char *feedfile, *path_run, *path_cli, *path_cli_dir;
360 static int quiet_multiple=0;
361 static int interactive=0, try_filemon=1;
362 static int try_stream=1;
364 static const char *inndconffile;
366 static int max_connections=10;
367 static int max_queue_per_conn=200;
368 static int target_max_feedfile_size=100000;
369 static int period_seconds=30;
370 static int filepoll_seconds=5;
371 static int max_queue_per_ipf=-1;
373 static int connection_setup_timeout=200;
374 static int inndcomm_flush_timeout=100;
376 static double nocheck_thresh= 95.0; /* converted from percentage by main */
377 static double nocheck_decay= 100; /* conv'd from articles to lambda by main */
379 /* all these are initialised to seconds, and converted to periods in main */
380 static int reconnect_delay_periods=1000;
381 static int flushfail_retry_periods=1000;
382 static int backlog_retry_minperiods=100;
383 static int backlog_spontrescan_periods=300;
384 static int spontaneous_flush_periods=100000;
385 static int max_separated_periods=2000;
386 static int need_activity_periods=1000;
387 static int lowvol_thresh=3;
388 static int lowvol_periods=1000;
390 static double max_bad_data_ratio= 1; /* conv'd from percentage by main */
391 static int max_bad_data_initial= 30;
392 /* in one corrupt 4096-byte block the number of newlines has
393 * mean 16 and standard deviation 3.99. 30 corresponds to z=+3.5 */
396 /*----- statistics -----*/
398 typedef enum { /* in queue in conn->sent */
399 art_Unchecked, /* not checked, not sent checking */
400 art_Wanted, /* checked, wanted sent body as requested */
401 art_Unsolicited, /* - sent body without check */
405 static const char *const artstate_names[]=
406 { "Unchecked", "Wanted", "Unsolicited", 0 };
408 #define RESULT_COUNTS(RCS,RCN) \
417 #define RCI_TRIPLE_FMT_BASE "%d (id=%d,bod=%d,nc=%d)"
418 #define RCI_TRIPLE_VALS_BASE(counts,x) \
419 counts[art_Unchecked] x \
420 + counts[art_Wanted] x \
421 + counts[art_Unsolicited] x, \
422 counts[art_Unchecked] x \
423 , counts[art_Wanted] x \
424 , counts[art_Unsolicited] x
427 #define RC_INDEX(x) RC_##x,
428 RESULT_COUNTS(RC_INDEX, RC_INDEX)
433 /*----- transmission buffers -----*/
449 /*----- core operational data structure types -----*/
452 /* This is also an instance of struct oop_readable */
453 struct oop_readable readable; /* first */
454 oop_readable_call *readable_callback;
455 void *readable_callback_user;
458 Filemon_Perfile *filemon;
460 oop_read *rd; /* non-0: reading; 0: constructing, or had EOF */
462 int skippinglong, paused, fake_readable;
465 long inprogress; /* includes queue.count and also articles in conns */
466 long autodefer; /* -1 means not doing autodefer */
468 int counts[art_MaxState][RCI_max];
469 int readcount_ok, readcount_blank, readcount_err, count_nooffer_missing;
484 #define SMS_LIST(X) \
492 enum StateMachineState {
493 #define SMS_DEF_ENUM(s) sm_##s,
494 SMS_LIST(SMS_DEF_ENUM)
497 static const char *sms_names[]= {
498 #define SMS_DEF_NAME(s) #s ,
499 SMS_LIST(SMS_DEF_NAME)
505 int fd; /* may be 0, meaning closed (during construction/destruction) */
506 oop_read *rd; /* likewise */
507 int oopwriting; /* since on_fd is not idempotent */
508 int max_queue, stream;
509 const char *quitting;
510 int since_activity; /* periods */
511 ArticleList waiting; /* not yet told peer */
512 ArticleList priority; /* peer says send it now */
513 ArticleList sent; /* offered/transmitted - in xmit or waiting reply */
514 struct iovec xmit[CONNIOVS];
515 XmitDetails xmitd[CONNIOVS];
520 /*----- general operational variables -----*/
522 /* main initialises */
523 static oop_source *loop;
524 static ConnList conns;
525 static char *path_lock, *path_flushing, *path_defer, *path_dump;
526 static char *globpat_backlog;
527 static pid_t self_pid;
528 static int *lowvol_perperiod;
529 static int lowvol_circptr;
530 static int lowvol_total; /* does not include current period */
532 /* statemc_init initialises */
533 static StateMachineState sms;
534 static int until_flush;
535 static InputFile *main_input_file, *flushing_input_file, *backlog_input_file;
538 /* initialisation to 0 is good */
539 static int until_connect, until_backlog_nextscan;
540 static double accept_proportion;
541 static int nocheck, nocheck_reported, in_child;
543 /* for simulation, debugging, etc. */
544 int simulate_flush= -1;
546 /*========== logging ==========*/
548 static void logcore(int sysloglevel, const char *fmt, ...) PRINTF(2,3);
549 static void logcore(int sysloglevel, const char *fmt, ...) {
551 if (interactive < 2) {
552 vsyslog(sysloglevel,fmt,al);
554 if (self_pid) fprintf(stderr,"[%lu] ",(unsigned long)self_pid);
555 vfprintf(stderr,fmt,al);
561 static void logv(int sysloglevel, const char *pfx, int errnoval,
562 const char *fmt, va_list al) PRINTF(5,0);
563 static void logv(int sysloglevel, const char *pfx, int errnoval,
564 const char *fmt, va_list al) {
565 char msgbuf[1024]; /* NB do not call mvasprintf here or you'll recurse */
566 vsnprintf(msgbuf,sizeof(msgbuf), fmt,al);
567 msgbuf[sizeof(msgbuf)-1]= 0;
569 if (sysloglevel >= LOG_ERR && (errnoval==EACCES || errnoval==EPERM))
570 sysloglevel= LOG_ERR; /* run by wrong user, probably */
572 logcore(sysloglevel, "<%s>%s: %s%s%s",
573 sitename, pfx, msgbuf,
574 errnoval>=0 ? ": " : "",
575 errnoval>=0 ? strerror(errnoval) : "");
578 #define DIEWRAP(fn, pfx, sysloglevel, err, estatus) \
579 static void fn(const char *fmt, ...) NORET_PRINTF(1,2); \
580 static void fn(const char *fmt, ...) { \
583 logv(sysloglevel, pfx, err, fmt, al); \
587 #define LOGWRAP(fn, pfx, sysloglevel, err) \
588 static void fn(const char *fmt, ...) PRINTF(1,2); \
589 static void fn(const char *fmt, ...) { \
591 logv(sysloglevel, pfx, err, fmt, al); \
595 #define INNLOGWRAP_DECLARE(fn, pfx, sysloglevel) \
596 static void duct_log_##fn(int errval, const char *fmt, va_list al, int l) { \
597 logv(sysloglevel, pfx, errval ? errval : -1, fmt, al); \
599 #define INNLOGWRAP_CALL(fn, pfx, sysloglevel) \
600 message_handlers_##fn(1, duct_log_##fn);
603 static int innduct_fatal_cleanup(void) { return 12; } /* used for libinn die */
605 /* We want to extend the set of logging functions from inn, and we
606 * want to prepend the site name to all our messages. */
608 DIEWRAP(syscrash, " critical", LOG_CRIT, errno, 16);
609 DIEWRAP(crash, " critical", LOG_CRIT, -1, 16);
611 #define INNLOGWRAPS(INNLOGWRAP) \
612 INNLOGWRAP(die, " fatal", LOG_ERR) \
613 INNLOGWRAP(warn, " warning", LOG_WARNING) \
614 INNLOGWRAP(notice, " notice", LOG_NOTICE)
615 INNLOGWRAPS(INNLOGWRAP_DECLARE)
617 LOGWRAP(info, " info", LOG_INFO, -1)
618 LOGWRAP(dbg, " debug", LOG_DEBUG, -1)
621 /*========== utility functions etc. ==========*/
623 /* error trapping wrappers are called mfoo rather than the more
624 * conventional xfoo because we don't want to clash with the existing
625 * xfoo functions in INN libs which use different error handlers
628 static char *mvasprintf(const char *fmt, va_list al) PRINTF(1,0);
629 static char *mvasprintf(const char *fmt, va_list al) {
631 int rc= vasprintf(&str,fmt,al);
632 if (rc<0) sysdie("vasprintf(\"%s\",...) failed", fmt);
635 static char *masprintf(const char *fmt, ...) PRINTF(1,2);
636 static char *masprintf(const char *fmt, ...) {
638 char *str= mvasprintf(fmt,al);
643 static int close_perhaps(int *fd) {
644 if (*fd <= 0) return 0;
649 static void mclose(int fd, const char *what, const char *what2) {
651 if (r) syscrash("close %s%s",what,what2?what2:"");
653 static void mclose_perhaps(int *fd, const char *what, const char *what2) {
654 if (*fd <= 0) return;
655 mclose(*fd,what,what2);
659 static pid_t mfork(const char *what) {
663 if (child==-1) sysdie("cannot fork for %s",what);
664 dbg("forked %s %ld", what, (unsigned long)child);
665 if (!child) postfork();
669 static void on_fd_read_except(int fd, oop_call_fd callback) {
670 loop->on_fd(loop, fd, OOP_READ, callback, 0);
671 loop->on_fd(loop, fd, OOP_EXCEPTION, callback, 0);
673 static void cancel_fd_read_except(int fd) {
674 loop->cancel_fd(loop, fd, OOP_READ);
675 loop->cancel_fd(loop, fd, OOP_EXCEPTION);
678 static void report_child_status(const char *what, int status) {
679 if (WIFEXITED(status)) {
680 int es= WEXITSTATUS(status);
682 warn("%s: child died with error exit status %d", what, es);
683 } else if (WIFSIGNALED(status)) {
684 int sig= WTERMSIG(status);
685 const char *sigstr= strsignal(sig);
686 const char *coredump= WCOREDUMP(status) ? " (core dumped)" : "";
688 warn("%s: child died due to fatal signal %s%s", what, sigstr, coredump);
690 warn("%s: child died due to unknown fatal signal %d%s",
691 what, sig, coredump);
693 warn("%s: child died with unknown wait status %d", what,status);
697 static int mwaitpid(pid_t *pid, const char *what) {
700 int r= kill(*pid, SIGKILL);
701 if (r) syscrash("cannot kill %s child", what);
703 pid_t got= waitpid(*pid, &status, 0);
704 if (got==-1) syscrash("cannot reap %s child", what);
705 if (got==0) crash("cannot reap %s child", what);
712 static void *zxmalloc(size_t sz) {
713 void *p= xmalloc(sz);
718 static void munlink(const char *path, const char *what) {
720 if (r) syscrash("can't unlink %s %s", path, what);
723 static time_t mtime(void) {
725 if (now==-1) syscrash("time(2) failed");
729 static void msigaction(int signo, const struct sigaction *sa) {
730 int r= sigaction(signo,sa,0);
731 if (r) syscrash("sigaction failed for \"%s\"", strsignal(signo));
734 static void msigsetdefault(int signo) {
736 memset(&sa,0,sizeof(sa));
737 sa.sa_handler= SIG_DFL;
738 msigaction(signo,&sa);
741 static void mgettimeofday(struct timeval *tv_r) {
742 int r= gettimeofday(tv_r,0);
743 if (r) syscrash("gettimeofday(2) failed");
746 static void msetnonblock(int fd, int nonblocking) {
747 int errnoval= oop_fd_nonblock(fd, nonblocking);
748 if (errnoval) { errno= errnoval; syscrash("setnonblocking"); }
751 static void check_isreg(const struct stat *stab, const char *path,
753 if (!S_ISREG(stab->st_mode))
754 crash("%s %s not a plain file (mode 0%lo)",
755 what, path, (unsigned long)stab->st_mode);
758 static void mfstat(int fd, struct stat *stab_r, const char *what) {
759 int r= fstat(fd, stab_r);
760 if (r) syscrash("could not fstat %s", what);
763 static void mfstat_isreg(int fd, struct stat *stab_r,
764 const char *path, const char *what) {
765 mfstat(fd, stab_r, what);
766 check_isreg(stab_r, path, what);
769 static void mlstat_isreg(const char *path, struct stat *stab,
770 int *enoent_r /* 0 means ENOENT is fatal */,
772 int r= lstat(path, stab);
774 if (errno==ENOENT && enoent_r) { *enoent_r=1; return; }
775 syscrash("could not lstat %s %s", what, path);
777 if (enoent_r) *enoent_r= 0;
778 check_isreg(stab, path, what);
781 static int samefile(const struct stat *a, const struct stat *b) {
782 assert(S_ISREG(a->st_mode));
783 assert(S_ISREG(b->st_mode));
784 return (a->st_ino == b->st_ino &&
785 a->st_dev == b->st_dev);
788 static char *sanitise(const char *input, int len) {
789 static char sanibuf[100]; /* returns pointer to this buffer! */
791 const char *p= input;
792 const char *endp= len>=0 ? input+len : 0;
796 if (q > sanibuf+sizeof(sanibuf)-8) { strcpy(q,"'.."); break; }
797 int c= (!endp || p<endp) ? *p++ : 0;
798 if (!c) { *q++= '\''; *q=0; break; }
799 if (c>=' ' && c<=126 && c!='\\') { *q++= c; continue; }
800 sprintf(q,"\\x%02x",c);
806 static int isewouldblock(int errnoval) {
807 return errnoval==EWOULDBLOCK || errnoval==EAGAIN;
810 /*========== command and control (CLI) connections ==========*/
812 static int cli_master;
814 typedef struct CliConn CliConn;
816 void (*destroy)(CliConn*);
822 struct sockaddr_un un;
827 static const oop_rd_style cli_rd_style= {
828 OOP_RD_DELIM_STRIP, '\n',
830 OOP_RD_SHORTREC_FORBID
833 static void cli_destroy(CliConn *cc) {
837 static void cli_checkouterr(CliConn *cc /* may destroy*/) {
838 if (ferror(cc->out) | fflush(cc->out)) {
839 info("CTRL%d write error %s", cc->fd, strerror(errno));
844 static void cli_prompt(CliConn *cc /* may destroy*/) {
845 fprintf(cc->out, "%s| ", sitename);
851 void (*f)(CliConn *cc, const CliCommand *ccmd,
852 const char *arg, size_t argsz);
857 static const CliCommand cli_commands[];
860 static void ccmd_##wh(CliConn *cc, const CliCommand *c, \
861 const char *arg, size_t argsz)
864 fputs("commands:\n", cc->out);
865 const CliCommand *ccmd;
866 for (ccmd=cli_commands; ccmd->cmd; ccmd++)
867 fprintf(cc->out, " %s\n", ccmd->cmd);
868 fputs("NB: permissible arguments are not shown above."
869 " Not all commands listed are safe. See innduct(8).\n", cc->out);
873 int ok= trigger_flush_ok("manual request");
874 if (!ok) fprintf(cc->out,"already flushing (state is %s)\n", sms_names[sms]);
879 notice("terminating (CTRL%d)",cc->fd);
880 raise_default(SIGTERM);
886 /* messing with our head: */
887 CCMD(period) { period(); }
888 CCMD(setintarg) { *(int*)c->xdata= atoi(arg); }
889 CCMD(setint) { *(int*)c->xdata= c->xval; }
890 CCMD(setint_period) { *(int*)c->xdata= c->xval; period(); }
892 static const CliCommand cli_commands[]= {
894 { "flush", ccmd_flush },
895 { "stop", ccmd_stop },
896 { "dump q", ccmd_dump, 0,0 },
897 { "dump a", ccmd_dump, 0,1 },
899 { "p", ccmd_period },
901 #define POKES(cmd,func) \
902 { cmd "flush", func, &until_flush, 1 }, \
903 { cmd "conn", func, &until_connect, 0 }, \
904 { cmd "blscan", func, &until_backlog_nextscan, 0 },
905 POKES("next ", ccmd_setint)
906 POKES("prod ", ccmd_setint_period)
908 { "pretend flush", ccmd_setintarg, &simulate_flush },
909 { "wedge blscan", ccmd_setint, &until_backlog_nextscan, -1 },
913 static void *cli_rd_ok(oop_source *lp, oop_read *oread, oop_rd_event ev,
914 const char *errmsg, int errnoval,
915 const char *data, size_t recsz, void *cc_v) {
919 info("CTRL%d closed", cc->fd);
924 if (recsz == 0) goto prompt;
926 const CliCommand *ccmd;
927 for (ccmd=cli_commands; ccmd->cmd; ccmd++) {
928 int l= strlen(ccmd->cmd);
929 if (recsz < l) continue;
930 if (recsz > l && data[l] != ' ') continue;
931 if (memcmp(data, ccmd->cmd, l)) continue;
933 int argl= (int)recsz - (l+1);
934 ccmd->f(cc, ccmd, argl>=0 ? data+l+1 : 0, argl);
938 fputs("unknown command; h for help\n", cc->out);
945 static void *cli_rd_err(oop_source *lp, oop_read *oread, oop_rd_event ev,
946 const char *errmsg, int errnoval,
947 const char *data, size_t recsz, void *cc_v) {
950 info("CTRL%d read error %s", cc->fd, errmsg);
955 static int cli_conn_startup(CliConn *cc /* may destroy*/,
957 cc->rd= oop_rd_new_fd(loop, cc->fd, 0,0);
958 if (!cc->rd) { warn("oop_rd_new_fd cli failed"); return -1; }
960 int er= oop_rd_read(cc->rd, &cli_rd_style, MAX_CLI_COMMAND,
963 if (er) { errno= er; syswarn("oop_rd_read cli failed"); return -1; }
965 info("CTRL%d %s ready", cc->fd, how);
970 static void cli_stdio_destroy(CliConn *cc) {
972 oop_rd_cancel(cc->rd);
973 errno= oop_rd_delete_tidy(cc->rd);
974 if (errno) syswarn("oop_rd_delete tidy failed (no-nonblock stdin?)");
979 static void cli_stdio(void) {
980 NEW_DECL(CliConn *,cc);
981 cc->destroy= cli_stdio_destroy;
985 int r= cli_conn_startup(cc,"stdio");
986 if (r) cc->destroy(cc);
989 static void cli_accepted_destroy(CliConn *cc) {
991 oop_rd_cancel(cc->rd);
992 oop_rd_delete_kill(cc->rd);
994 if (cc->out) { fclose(cc->out); cc->fd=0; }
995 close_perhaps(&cc->fd);
999 static void *cli_master_readable(oop_source *lp, int master,
1000 oop_event ev, void *u) {
1001 NEW_DECL(CliConn *,cc);
1002 cc->destroy= cli_accepted_destroy;
1004 cc->salen= sizeof(cc->sa);
1005 cc->fd= accept(master, &cc->sa.sa, &cc->salen);
1006 if (cc->fd<0) { syswarn("error accepting cli connection"); goto x; }
1008 cc->out= fdopen(cc->fd, "w");
1009 if (!cc->out) { syswarn("error fdopening accepted cli connection"); goto x; }
1011 int r= cli_conn_startup(cc, "accepted");
1014 return OOP_CONTINUE;
1018 return OOP_CONTINUE;
1021 #define NOCLI(...) do{ \
1022 syswarn("no cli listener, because failed to " __VA_ARGS__); \
1026 static void cli_init(void) {
1029 struct sockaddr_un un;
1032 memset(&sa,0,sizeof(sa));
1033 int maxlen= sizeof(sa.un.sun_path);
1036 info("control command line disabled");
1040 int pathlen= strlen(path_cli);
1041 if (pathlen > maxlen) {
1042 warn("no cli listener, because cli socket path %s too long (%d>%d)",
1043 path_cli, pathlen, maxlen);
1048 int r= mkdir(path_cli_dir, 0700);
1049 if (r && errno!=EEXIST)
1050 NOCLI("create cli socket directory %s", path_cli_dir);
1053 int r= unlink(path_cli);
1054 if (r && errno!=ENOENT)
1055 NOCLI("remove old cli socket %s", path_cli);
1057 cli_master= socket(PF_UNIX, SOCK_STREAM, 0);
1058 if (cli_master<0) NOCLI("create new cli master socket");
1060 int sl= pathlen + offsetof(struct sockaddr_un, sun_path);
1061 sa.un.sun_family= AF_UNIX;
1062 memcpy(sa.un.sun_path, path_cli, pathlen);
1064 r= bind(cli_master, &sa.sa, sl);
1065 if (r) NOCLI("bind to cli socket path %s", sa.un.sun_path);
1067 r= listen(cli_master, 5);
1068 if (r) NOCLI("listen to cli master socket");
1070 msetnonblock(cli_master, 1);
1072 loop->on_fd(loop, cli_master, OOP_READ, cli_master_readable, 0);
1073 info("cli ready, listening on %s", path_cli);
1078 mclose_perhaps(&cli_master, "cli master",0);
1082 /*========== management of connections ==========*/
1084 static void reconnect_blocking_event(void) {
1085 until_connect= reconnect_delay_periods;
1088 static void conn_closefd(Conn *conn, const char *msgprefix) {
1089 int r= close_perhaps(&conn->fd);
1090 if (r) info("C%d %serror closing socket: %s",
1091 conn->fd, msgprefix, strerror(errno));
1094 static int conn_busy(Conn *conn) {
1096 conn->waiting.count ||
1097 conn->priority.count ||
1102 static void conn_dispose(Conn *conn) {
1105 oop_rd_cancel(conn->rd);
1106 oop_rd_delete_kill(conn->rd);
1110 loop->cancel_fd(loop, conn->fd, OOP_WRITE);
1111 loop->cancel_fd(loop, conn->fd, OOP_EXCEPTION);
1113 conn_closefd(conn,"");
1117 static void *conn_exception(oop_source *lp, int fd,
1118 oop_event ev, void *conn_v) {
1121 assert(fd == conn->fd);
1122 assert(ev == OOP_EXCEPTION);
1123 int r= read(conn->fd, &ch, 1);
1124 if (r<0) connfail(conn,"read failed: %s",strerror(errno));
1125 else connfail(conn,"exceptional condition on socket (peer sent urgent"
1126 " data? read(,&ch,1)=%d,ch='\\x%02x')",r,ch);
1127 return OOP_CONTINUE;
1130 static void vconnfail(Conn *conn, const char *fmt, va_list al) {
1131 int requeue[art_MaxState];
1132 memset(requeue,0,sizeof(requeue));
1136 while ((art= LIST_REMHEAD(conn->priority)))
1137 LIST_ADDTAIL(art->ipf->queue, art);
1139 while ((art= LIST_REMHEAD(conn->waiting)))
1140 LIST_ADDTAIL(art->ipf->queue, art);
1142 while ((art= LIST_REMHEAD(conn->sent))) {
1143 requeue[art->state]++;
1144 if (art->state==art_Unsolicited) art->state= art_Unchecked;
1145 LIST_ADDTAIL(art->ipf->queue,art);
1146 check_reading_pause_resume(art->ipf);
1151 for (i=0, d=conn->xmitd; i<conn->xmitu; i++, d++)
1154 LIST_REMOVE(conns,conn);
1156 char *m= mvasprintf(fmt,al);
1157 warn("C%d (now %d) connection failed requeueing " RCI_TRIPLE_FMT_BASE ": %s",
1158 conn->fd, conns.count, RCI_TRIPLE_VALS_BASE(requeue, /*nothing*/), m);
1161 reconnect_blocking_event();
1163 check_assign_articles();
1166 static void connfail(Conn *conn, const char *fmt, ...) {
1169 vconnfail(conn,fmt,al);
1173 static void conn_idle_close(Conn *conn, const char *why) {
1174 static const char quitcmd[]= "QUIT\r\n";
1175 int todo= sizeof(quitcmd)-1;
1176 const char *p= quitcmd;
1178 int r= write(conn->fd, p, todo);
1180 if (isewouldblock(errno))
1181 connfail(conn, "blocked writing QUIT to idle connection");
1183 connfail(conn, "failed to write QUIT to idle connection: %s",
1190 conn->quitting= why;
1191 conn->since_activity= 0;
1192 dbg("C%d is idle (%s), quitting", conn->fd, why);
1199 * For our last connection, we also shut it down if we have had
1200 * less than K in the last L
1202 static void check_idle_conns(void) {
1205 int volthisperiod= lowvol_perperiod[lowvol_circptr];
1207 lowvol_circptr %= lowvol_periods;
1208 lowvol_total += volthisperiod;
1209 lowvol_total -= lowvol_perperiod[lowvol_circptr];
1210 lowvol_perperiod[lowvol_circptr]= 0;
1213 conn->since_activity++;
1217 if (conn->since_activity <= need_activity_periods) continue;
1219 /* We need to shut this down */
1221 connfail(conn,"timed out waiting for response to QUIT (%s)",
1223 else if (conn->sent.count)
1224 connfail(conn,"timed out waiting for responses");
1225 else if (conn->waiting.count || conn->priority.count)
1226 connfail(conn,"BUG IN INNDUCT conn has queue but nothing sent");
1227 else if (conn->xmitu)
1228 connfail(conn,"peer has been sending responses"
1229 " before receiving our commands!");
1231 conn_idle_close(conn, "no activity");
1236 conn= LIST_HEAD(conns);
1237 if (!volthisperiod &&
1239 lowvol_total < lowvol_thresh &&
1241 conn_idle_close(conn, "low volume");
1244 /*---------- making new connections ----------*/
1246 static pid_t connecting_child;
1247 static int connecting_fdpass_sock;
1249 static void connect_attempt_discard(void) {
1250 if (connecting_child) {
1251 int status= mwaitpid(&connecting_child, "connect");
1252 if (!(WIFEXITED(status) ||
1253 (WIFSIGNALED(status) && WTERMSIG(status) == SIGKILL)))
1254 report_child_status("connect", status);
1256 if (connecting_fdpass_sock) {
1257 cancel_fd_read_except(connecting_fdpass_sock);
1258 mclose_perhaps(&connecting_fdpass_sock, "connecting fdpass socket",0);
1262 #define PREP_DECL_MSG_CMSG(msg) \
1264 struct iovec msgiov; \
1265 msgiov.iov_base= &msgbyte; \
1266 msgiov.iov_len= 1; \
1267 struct msghdr msg; \
1268 memset(&msg,0,sizeof(msg)); \
1269 char msg##cbuf[CMSG_SPACE(sizeof(int))]; \
1270 msg.msg_iov= &msgiov; \
1271 msg.msg_iovlen= 1; \
1272 msg.msg_control= msg##cbuf; \
1273 msg.msg_controllen= sizeof(msg##cbuf);
1275 static void *connchild_event(oop_source *lp, int fd, oop_event e, void *u) {
1278 assert(fd == connecting_fdpass_sock);
1280 PREP_DECL_MSG_CMSG(msg);
1282 ssize_t rs= recvmsg(fd, &msg, 0);
1284 if (isewouldblock(errno)) return OOP_CONTINUE;
1285 syswarn("failed to read socket from connecting child");
1290 LIST_INIT(conn->waiting);
1291 LIST_INIT(conn->priority);
1292 LIST_INIT(conn->sent);
1294 struct cmsghdr *h= 0;
1295 if (rs >= 0) h= CMSG_FIRSTHDR(&msg);
1297 int status= mwaitpid(&connecting_child, "connect child (broken)");
1299 if (WIFEXITED(status)) {
1300 if (WEXITSTATUS(status) != 0 &&
1301 WEXITSTATUS(status) != CONNCHILD_ESTATUS_STREAM &&
1302 WEXITSTATUS(status) != CONNCHILD_ESTATUS_NOSTREAM)
1303 /* child already reported the problem */;
1305 if (e == OOP_EXCEPTION)
1306 warn("connect: connection child exited code %d but"
1307 " unexpected exception on fdpass socket",
1308 WEXITSTATUS(status));
1310 warn("connect: connection child exited code %d but"
1312 WEXITSTATUS(status), (int)rs);
1314 } else if (WIFSIGNALED(status) && WTERMSIG(status) == SIGALRM) {
1315 warn("connect: connection attempt timed out");
1317 report_child_status("connect", status);
1322 #define CHK(field, val) \
1323 if (h->cmsg_##field != val) { \
1324 crash("connect: child sent cmsg with cmsg_" #field "=%d, expected %d", \
1325 h->cmsg_##field, val); \
1328 CHK(level, SOL_SOCKET);
1329 CHK(type, SCM_RIGHTS);
1330 CHK(len, CMSG_LEN(sizeof(conn->fd)));
1333 if (CMSG_NXTHDR(&msg,h)) crash("connect: child sent many cmsgs");
1335 memcpy(&conn->fd, CMSG_DATA(h), sizeof(conn->fd));
1338 pid_t got= waitpid(connecting_child, &status, 0);
1339 if (got==-1) syscrash("connect: real wait for child");
1340 assert(got == connecting_child);
1341 connecting_child= 0;
1343 if (!WIFEXITED(status)) { report_child_status("connect",status); goto x; }
1344 int es= WEXITSTATUS(status);
1346 case CONNCHILD_ESTATUS_STREAM: conn->stream= 1; break;
1347 case CONNCHILD_ESTATUS_NOSTREAM: conn->stream= 0; break;
1349 die("connect: child gave unexpected exit status %d", es);
1353 conn->max_queue= conn->stream ? max_queue_per_conn : 1;
1355 loop->on_fd(loop, conn->fd, OOP_EXCEPTION, conn_exception, conn);
1356 conn->rd= oop_rd_new_fd(loop,conn->fd, 0, 0); /* sets nonblocking, too */
1357 if (!conn->fd) crash("oop_rd_new_fd conn failed (fd=%d)",conn->fd);
1358 int r= oop_rd_read(conn->rd, &peer_rd_style, NNTP_STRLEN,
1360 &peer_rd_err, conn);
1361 if (r) syscrash("oop_rd_read for peer (fd=%d)",conn->fd);
1363 LIST_ADDHEAD(conns, conn);
1364 notice("C%d (now %d) connected %s",
1365 conn->fd, conns.count, conn->stream ? "streaming" : "plain");
1367 connect_attempt_discard();
1368 check_assign_articles();
1369 return OOP_CONTINUE;
1373 connect_attempt_discard();
1374 reconnect_blocking_event();
1375 return OOP_CONTINUE;
1378 static int allow_connect_start(void) {
1379 return conns.count < max_connections
1380 && !connecting_child
1384 static void connect_start(void) {
1385 assert(!connecting_child);
1386 assert(!connecting_fdpass_sock);
1388 info("starting connection attempt");
1389 int ok_until_connect= until_connect;
1390 reconnect_blocking_event();
1393 int r= socketpair(AF_UNIX, SOCK_STREAM, 0, socks);
1394 if (r) { syswarn("connect: cannot create socketpair for child"); return; }
1396 connecting_child= mfork("connection");
1398 if (!connecting_child) {
1399 FILE *cn_from, *cn_to;
1400 char buf[NNTP_STRLEN+100];
1401 int exitstatus= CONNCHILD_ESTATUS_NOSTREAM;
1403 mclose(socks[0], "(in child) parent's connection fdpass socket",0);
1405 alarm(connection_setup_timeout);
1406 if (NNTPconnect((char*)remote_host, port, &cn_from, &cn_to, buf) < 0) {
1410 unsigned char c= buf[l-1];
1411 if (!isspace(c)) break;
1412 if (c=='\n' || c=='\r') stripped=1;
1416 sysdie("connect: connection attempt failed");
1419 die("connect: %s: %s", stripped ? "rejected" : "failed",
1423 if (NNTPsendpassword((char*)remote_host, cn_from, cn_to) < 0)
1424 sysdie("connect: authentication failed");
1426 if (fputs("MODE STREAM\r\n", cn_to)==EOF ||
1428 sysdie("connect: could not send MODE STREAM");
1429 buf[sizeof(buf)-1]= 0;
1430 if (!fgets(buf, sizeof(buf)-1, cn_from)) {
1431 if (ferror(cn_from))
1432 sysdie("connect: could not read response to MODE STREAM");
1434 die("connect: connection close in response to MODE STREAM");
1439 die("connect: response to MODE STREAM is too long: %.100s...",
1441 l--; if (l>0 && buf[l-1]=='\r') l--;
1444 int rcode= strtoul(buf,&ep,10);
1446 die("connect: bad response to MODE STREAM: %.50s", sanitise(buf,-1));
1450 exitstatus= CONNCHILD_ESTATUS_STREAM;
1456 warn("connect: unexpected response to MODE STREAM: %.50s",
1462 int fd= fileno(cn_from);
1464 PREP_DECL_MSG_CMSG(msg);
1465 struct cmsghdr *cmsg= CMSG_FIRSTHDR(&msg);
1466 cmsg->cmsg_level= SOL_SOCKET;
1467 cmsg->cmsg_type= SCM_RIGHTS;
1468 cmsg->cmsg_len= CMSG_LEN(sizeof(fd));
1469 memcpy(CMSG_DATA(cmsg), &fd, sizeof(fd));
1471 msg.msg_controllen= cmsg->cmsg_len;
1472 r= sendmsg(socks[1], &msg, 0);
1473 if (r<0) syscrash("sendmsg failed for new connection");
1474 if (r!=1) crash("sendmsg for new connection gave wrong result %d",r);
1479 mclose(socks[1], "connecting fdpass child's socket",0);
1480 connecting_fdpass_sock= socks[0];
1481 msetnonblock(connecting_fdpass_sock, 1);
1482 on_fd_read_except(connecting_fdpass_sock, connchild_event);
1485 until_connect= ok_until_connect;
1488 /*---------- assigning articles to conns, and transmitting ----------*/
1490 static Article *dequeue_from(int peek, InputFile *ipf) {
1492 if (peek) return LIST_HEAD(ipf->queue);
1494 Article *art= LIST_REMHEAD(ipf->queue);
1496 check_reading_pause_resume(ipf);
1500 static Article *dequeue(int peek) {
1502 art= dequeue_from(peek, flushing_input_file); if (art) return art;
1503 art= dequeue_from(peek, backlog_input_file); if (art) return art;
1504 art= dequeue_from(peek, main_input_file); if (art) return art;
1508 static void check_assign_articles(void) {
1514 int spare=0, inqueue=0;
1516 /* Find a connection to offer this article. We prefer a busy
1517 * connection to an idle one, provided it's not full. We take the
1518 * first (oldest) and since that's stable, it will mean we fill up
1519 * connections in order. That way if we have too many
1520 * connections, the spare ones will go away eventually.
1523 if (walk->quitting) continue;
1524 inqueue= walk->sent.count + walk->priority.count
1525 + walk->waiting.count;
1526 spare= walk->max_queue - inqueue;
1527 assert(inqueue <= max_queue_per_conn);
1529 if (inqueue==0) /*idle*/ { if (!use) use= walk; }
1530 else if (spare>0) /*working*/ { use= walk; break; }
1533 if (!inqueue) use->since_activity= 0; /* reset idle counter */
1535 Article *art= dequeue(0);
1537 LIST_ADDTAIL(use->waiting, art);
1538 lowvol_perperiod[lowvol_circptr]++;
1541 conn_maybe_write(use);
1542 } else if (allow_connect_start()) {
1551 static void *conn_writeable(oop_source *l, int fd, oop_event ev, void *u) {
1552 conn_maybe_write(u);
1553 return OOP_CONTINUE;
1556 static void conn_maybe_write(Conn *conn) {
1558 conn_make_some_xmits(conn);
1560 loop->cancel_fd(loop, conn->fd, OOP_WRITE);
1561 conn->oopwriting= 0;
1565 void *rp= conn_write_some_xmits(conn);
1566 if (rp==OOP_CONTINUE) {
1567 if (!conn->oopwriting) {
1568 loop->on_fd(loop, conn->fd, OOP_WRITE, conn_writeable, conn);
1569 conn->oopwriting= 1;
1572 } else if (rp==OOP_HALT) {
1575 /* transmitted everything */
1582 /*---------- expiry, flow control and deferral ----------*/
1585 * flow control notes
1586 * to ensure articles go away eventually
1587 * separate queue for each input file
1589 * every period, check head of backlog queue for expiry with SMretrieve
1590 * if too old: discard, and check next article
1591 * also check every backlog article as we read it
1593 * after too long in SEPARATED/DROPPING ie Separated/Finishing/Dropping
1594 * one-off: eat queued articles from flushing and write them to defer
1595 * one-off: connfail all connections which have any articles from flushing
1596 * newly read articles from flushing go straight to defer
1597 * this should take care of it and get us out of this state
1598 * to avoid filling up ram needlessly
1600 * limit number of queued articles for each ipf
1601 * pause/resume inputfile tailing
1604 static void check_reading_pause_resume(InputFile *ipf) {
1605 if (ipf->queue.count >= max_queue_per_ipf)
1606 inputfile_reading_pause(ipf);
1608 inputfile_reading_resume(ipf);
1611 static void article_defer(Article *art /* not on a queue */, int whichcount) {
1613 if (fprintf(defer, "%s %s\n", TokenToText(art->token), art->messageid) <0
1615 sysdie("write to defer file %s",path_defer);
1616 article_done(art, whichcount);
1619 static int article_check_expired(Article *art /* must be queued, not conn */) {
1620 ARTHANDLE *artdata= SMretrieve(art->token, RETR_STAT);
1621 if (artdata) { SMfreearticle(artdata); return 0; }
1623 LIST_REMOVE(art->ipf->queue, art);
1625 art->ipf->count_nooffer_missing++;
1626 article_done(art,-1);
1630 static void inputfile_queue_check_expired(InputFile *ipf) {
1634 Article *art= LIST_HEAD(ipf->queue);
1635 int exp= article_check_expired(art);
1638 check_reading_pause_resume(ipf);
1641 static void article_autodefer(InputFile *ipf, Article *art) {
1643 article_defer(art,-1);
1646 static int has_article_in(const ArticleList *al, InputFile *ipf) {
1648 for (art=LIST_HEAD(*al); art; art=LIST_NEXT(art))
1649 if (art->ipf == ipf) return 1;
1653 static void autodefer_input_file_articles(InputFile *ipf) {
1655 while ((art= LIST_REMHEAD(ipf->queue)))
1656 article_autodefer(ipf, art);
1659 static void autodefer_input_file(InputFile *ipf) {
1660 static const char *const abandon= "stuck";
1663 autodefer_input_file_articles(ipf);
1665 if (ipf->inprogress) {
1668 if (has_article_in(&walk->waiting, ipf) ||
1669 has_article_in(&walk->priority, ipf) ||
1670 has_article_in(&walk->sent, ipf))
1671 walk->quitting= abandon;
1673 while (ipf->inprogress) {
1675 if (walk->quitting == abandon) goto found;
1676 abort(); /* where are they ?? */
1679 connfail(walk, "connection is stuck or crawling,"
1680 " and we need to finish flush");
1681 autodefer_input_file_articles(ipf);
1685 check_reading_pause_resume(ipf);
1688 /*========== article transmission ==========*/
1690 static XmitDetails *xmit_core(Conn *conn, const char *data, int len,
1691 XmitKind kind) { /* caller must then fill in details */
1692 struct iovec *v= &conn->xmit[conn->xmitu];
1693 XmitDetails *d= &conn->xmitd[conn->xmitu++];
1694 v->iov_base= (char*)data;
1700 static void xmit_noalloc(Conn *conn, const char *data, int len) {
1701 xmit_core(conn,data,len, xk_Const);
1703 #define XMIT_LITERAL(lit) (xmit_noalloc(conn, (lit), sizeof(lit)-1))
1705 static void xmit_artbody(Conn *conn, ARTHANDLE *ah /* consumed */) {
1706 XmitDetails *d= xmit_core(conn, ah->data, ah->len, xk_Artdata);
1710 static void xmit_free(XmitDetails *d) {
1712 case xk_Artdata: SMfreearticle(d->info.sm_art); break;
1713 case xk_Const: break;
1718 static void *conn_write_some_xmits(Conn *conn) {
1720 * 0: nothing more to write, no need to call us again
1721 * OOP_CONTINUE: more to write but fd not writeable
1722 * OOP_HALT: disaster, have destroyed conn
1725 int count= conn->xmitu;
1726 if (!count) return 0;
1728 if (count > IOV_MAX) count= IOV_MAX;
1729 ssize_t rs= writev(conn->fd, conn->xmit, count);
1731 if (isewouldblock(errno)) return OOP_CONTINUE;
1732 connfail(conn, "write failed: %s", strerror(errno));
1738 for (done=0; rs; ) {
1739 assert(done<conn->xmitu);
1740 struct iovec *vp= &conn->xmit[done];
1741 XmitDetails *dp= &conn->xmitd[done];
1742 if (rs >= vp->iov_len) {
1744 xmit_free(dp); /* vp->iov_len -= vp->iov_len, etc. */
1747 vp->iov_base= (char*)vp->iov_base + rs;
1749 break; /* rs -= rs */
1752 int newu= conn->xmitu - done;
1753 memmove(conn->xmit, conn->xmit + done, newu * sizeof(*conn->xmit));
1754 memmove(conn->xmitd, conn->xmitd + done, newu * sizeof(*conn->xmitd));
1759 static void conn_make_some_xmits(Conn *conn) {
1761 if (conn->xmitu+5 > CONNIOVS)
1764 Article *art= LIST_REMHEAD(conn->priority);
1765 if (!art) art= LIST_REMHEAD(conn->waiting);
1768 if (art->state >= art_Wanted || (conn->stream && nocheck)) {
1769 /* actually send it */
1771 ARTHANDLE *artdata= SMretrieve(art->token, RETR_ALL);
1774 art->state == art_Unchecked ? art_Unsolicited :
1775 art->state == art_Wanted ? art_Wanted :
1778 if (!artdata) art->missing= 1;
1779 art->ipf->counts[art->state][ artdata ? RC_sent : RC_missing ]++;
1783 XMIT_LITERAL("TAKETHIS ");
1784 xmit_noalloc(conn, art->messageid, art->midlen);
1785 XMIT_LITERAL("\r\n");
1786 xmit_artbody(conn, artdata);
1788 article_done(art, -1);
1792 /* we got 235 from IHAVE */
1794 xmit_artbody(conn, artdata);
1796 XMIT_LITERAL(".\r\n");
1800 LIST_ADDTAIL(conn->sent, art);
1806 XMIT_LITERAL("CHECK ");
1808 XMIT_LITERAL("IHAVE ");
1809 xmit_noalloc(conn, art->messageid, art->midlen);
1810 XMIT_LITERAL("\r\n");
1812 assert(art->state == art_Unchecked);
1813 art->ipf->counts[art->state][RC_sent]++;
1814 LIST_ADDTAIL(conn->sent, art);
1819 /*========== handling responses from peer ==========*/
1821 static const oop_rd_style peer_rd_style= {
1822 OOP_RD_DELIM_STRIP, '\n',
1824 OOP_RD_SHORTREC_FORBID
1827 static void *peer_rd_err(oop_source *lp, oop_read *oread, oop_rd_event ev,
1828 const char *errmsg, int errnoval,
1829 const char *data, size_t recsz, void *conn_v) {
1831 connfail(conn, "error receiving from peer: %s", errmsg);
1832 return OOP_CONTINUE;
1835 static Article *article_reply_check(Conn *conn, const char *response,
1836 int code_indicates_streaming,
1838 /* 1:yes, -1:no, 0:dontcare */,
1839 const char *sanitised_response) {
1840 Article *art= LIST_HEAD(conn->sent);
1844 "peer gave unexpected response when no commands outstanding: %s",
1845 sanitised_response);
1849 if (code_indicates_streaming) {
1850 assert(!memchr(response, 0, 4)); /* ensured by peer_rd_ok */
1851 if (!conn->stream) {
1852 connfail(conn, "peer gave streaming response code "
1853 " to IHAVE or subsequent body: %s", sanitised_response);
1856 const char *got_mid= response+4;
1857 int got_midlen= strcspn(got_mid, " \n\r");
1858 if (got_midlen<3 || got_mid[0]!='<' || got_mid[got_midlen-1]!='>') {
1859 connfail(conn, "peer gave streaming response with syntactically invalid"
1860 " messageid: %s", sanitised_response);
1863 if (got_midlen != art->midlen ||
1864 memcmp(got_mid, art->messageid, got_midlen)) {
1865 connfail(conn, "peer gave streaming response code to wrong article -"
1866 " probable synchronisation problem; we offered: %s;"
1868 art->messageid, sanitised_response);
1873 connfail(conn, "peer gave non-streaming response code to"
1874 " CHECK/TAKETHIS: %s", sanitised_response);
1879 if (must_have_sent>0 && art->state < art_Wanted) {
1880 connfail(conn, "peer says article accepted but"
1881 " we had not sent the body: %s", sanitised_response);
1884 if (must_have_sent<0 && art->state >= art_Wanted) {
1885 connfail(conn, "peer says please sent the article but we just did: %s",
1886 sanitised_response);
1890 Article *art_again= LIST_REMHEAD(conn->sent);
1891 assert(art_again == art);
1895 static void update_nocheck(int accepted) {
1896 accept_proportion *= nocheck_decay;
1897 accept_proportion += accepted * (1.0 - nocheck_decay);
1898 int new_nocheck= accept_proportion >= nocheck_thresh;
1899 if (new_nocheck && !nocheck_reported) {
1900 notice("entering nocheck mode for the first time");
1901 nocheck_reported= 1;
1902 } else if (new_nocheck != nocheck) {
1903 dbg("nocheck mode %s", new_nocheck ? "start" : "stop");
1905 nocheck= new_nocheck;
1908 static void article_done(Article *art, int whichcount) {
1909 if (whichcount>=0 && !art->missing)
1910 art->ipf->counts[art->state][whichcount]++;
1912 if (whichcount == RC_accepted) update_nocheck(1);
1913 else if (whichcount == RC_unwanted) update_nocheck(0);
1915 InputFile *ipf= art->ipf;
1917 while (art->blanklen) {
1918 static const char spaces[]=
1928 int w= art->blanklen; if (w >= sizeof(spaces)) w= sizeof(spaces)-1;
1929 int r= pwrite(ipf->fd, spaces, w, art->offset);
1931 if (errno==EINTR) continue;
1932 syscrash("failed to blank entry for %s (length %d at offset %lu) in %s",
1933 art->messageid, art->blanklen,
1934 (unsigned long)art->offset, ipf->path);
1936 assert(r>=0 && r<=w);
1942 assert(ipf->inprogress >= 0);
1945 if (!ipf->inprogress && ipf != main_input_file)
1946 queue_check_input_done();
1949 static void *peer_rd_ok(oop_source *lp, oop_read *oread, oop_rd_event ev,
1950 const char *errmsg, int errnoval,
1951 const char *data, size_t recsz, void *conn_v) {
1954 if (ev == OOP_RD_EOF) {
1955 connfail(conn, "unexpected EOF from peer");
1956 return OOP_CONTINUE;
1958 assert(ev == OOP_RD_OK);
1960 char *sani= sanitise(data,-1);
1963 unsigned long code= strtoul(data, &ep, 10);
1964 if (ep != data+3 || *ep != ' ' || data[0]=='0') {
1965 connfail(conn, "badly formatted response from peer: %s", sani);
1966 return OOP_CONTINUE;
1969 int busy= conn_busy(conn);
1971 if (conn->quitting) {
1972 if (code!=205 && code!=400) {
1973 connfail(conn, "peer gave unexpected response to QUIT (%s): %s",
1974 conn->quitting, sani);
1976 LIST_REMOVE(conns,conn);
1977 notice("C%d (now %d) idle connection closed (%s)",
1978 conn->fd, conns.count, conn->quitting);
1982 return OOP_CONTINUE;
1985 conn->since_activity= 0;
1988 #define GET_ARTICLE(musthavesent) do{ \
1989 art= article_reply_check(conn, data, code_streaming, musthavesent, sani); \
1990 if (!art) return OOP_CONTINUE; /* reply_check has failed the conn */ \
1993 #define ARTICLE_DEALTWITH(streaming,musthavesent,how) do{ \
1994 code_streaming= (streaming); \
1995 GET_ARTICLE(musthavesent); \
1996 article_done(art, RC_##how); \
2000 #define PEERBADMSG(m) do { \
2001 connfail(conn, m ": %s", sani); return OOP_CONTINUE; \
2004 int code_streaming= 0;
2008 default: PEERBADMSG("peer sent unexpected message");
2012 PEERBADMSG("peer timed us out or stopped accepting articles");
2014 LIST_REMOVE(conns,conn);
2015 notice("C%d (now %d) idle connection closed by peer",
2016 conns.count, conn->fd);
2018 return OOP_CONTINUE;
2020 case 435: ARTICLE_DEALTWITH(0,0,unwanted); /* IHAVE says they have it */
2021 case 438: ARTICLE_DEALTWITH(1,0,unwanted); /* CHECK/TAKETHIS: they have it */
2023 case 235: ARTICLE_DEALTWITH(0,1,accepted); /* IHAVE says thanks */
2024 case 239: ARTICLE_DEALTWITH(1,1,accepted); /* TAKETHIS says thanks */
2026 case 437: ARTICLE_DEALTWITH(0,0,rejected); /* IHAVE says rejected */
2027 case 439: ARTICLE_DEALTWITH(1,0,rejected); /* TAKETHIS says rejected */
2029 case 238: /* CHECK says send it */
2031 case 335: /* IHAVE says send it */
2033 assert(art->state == art_Unchecked);
2034 art->ipf->counts[art->state][RC_accepted]++;
2035 art->state= art_Wanted;
2036 LIST_ADDTAIL(conn->priority, art);
2039 case 431: /* CHECK or TAKETHIS says try later */
2041 case 436: /* IHAVE says try later */
2043 article_defer(art, RC_deferred);
2049 conn_maybe_write(conn);
2050 check_assign_articles();
2051 return OOP_CONTINUE;
2055 /*========== monitoring of input files ==========*/
2057 static void feedfile_eof(InputFile *ipf) {
2058 assert(ipf != main_input_file); /* promised by tailing_try_read */
2059 inputfile_reading_stop(ipf);
2061 if (ipf == flushing_input_file) {
2062 assert(sms==sm_SEPARATED || sms==sm_DROPPING);
2063 if (main_input_file) inputfile_reading_start(main_input_file);
2064 statemc_check_flushing_done();
2065 } else if (ipf == backlog_input_file) {
2066 statemc_check_backlog_done();
2068 abort(); /* supposed to wait rather than get EOF on main input file */
2072 static InputFile *open_input_file(const char *path) {
2073 int fd= open(path, O_RDWR);
2075 if (errno==ENOENT) return 0;
2076 sysdie("unable to open input file %s", path);
2080 InputFile *ipf= xmalloc(sizeof(*ipf) + strlen(path) + 1);
2081 memset(ipf,0,sizeof(*ipf));
2085 LIST_INIT(ipf->queue);
2086 strcpy(ipf->path, path);
2091 static void close_input_file(InputFile *ipf) { /* does not free */
2092 assert(!ipf->readable_callback); /* must have had ->on_cancel */
2093 assert(!ipf->filemon); /* must have had inputfile_reading_stop */
2094 assert(!ipf->rd); /* must have had inputfile_reading_stop */
2095 assert(!ipf->inprogress); /* no dangling pointers pointing here */
2096 mclose_perhaps(&ipf->fd, "input file ", ipf->path);
2100 /*---------- dealing with articles read in the input file ----------*/
2102 static void *feedfile_got_bad_data(InputFile *ipf, off_t offset,
2103 const char *data, const char *how) {
2104 warn("corrupted file: %s, offset %lu: %s: in %s",
2105 ipf->path, (unsigned long)offset, how, sanitise(data,-1));
2106 ipf->readcount_err++;
2107 if (ipf->readcount_err > max_bad_data_initial +
2108 (ipf->readcount_ok+ipf->readcount_blank) / max_bad_data_ratio)
2109 crash("too much garbage in input file! (%d errs, %d ok, %d blank)",
2110 ipf->readcount_err, ipf->readcount_ok, ipf->readcount_blank);
2111 return OOP_CONTINUE;
2114 static void *feedfile_read_err(oop_source *lp, oop_read *rd,
2115 oop_rd_event ev, const char *errmsg,
2116 int errnoval, const char *data, size_t recsz,
2118 InputFile *ipf= ipf_v;
2119 assert(ev == OOP_RD_SYSTEM);
2121 syscrash("error reading input file: %s, offset %lu",
2122 ipf->path, (unsigned long)ipf->offset);
2125 static void *feedfile_got_article(oop_source *lp, oop_read *rd,
2126 oop_rd_event ev, const char *errmsg,
2127 int errnoval, const char *data, size_t recsz,
2129 InputFile *ipf= ipf_v;
2131 char tokentextbuf[sizeof(TOKEN)*2+3];
2133 if (!data) { feedfile_eof(ipf); return OOP_CONTINUE; }
2135 off_t old_offset= ipf->offset;
2136 ipf->offset += recsz + !!(ev == OOP_RD_OK);
2138 #define X_BAD_DATA(m) return feedfile_got_bad_data(ipf,old_offset,data,m);
2140 if (ev==OOP_RD_PARTREC)
2141 feedfile_got_bad_data(ipf,old_offset,data,"missing final newline");
2142 /* but process it anyway */
2144 if (ipf->skippinglong) {
2145 if (ev==OOP_RD_OK) ipf->skippinglong= 0; /* fine now */
2146 return OOP_CONTINUE;
2148 if (ev==OOP_RD_LONG) {
2149 ipf->skippinglong= 1;
2150 X_BAD_DATA("overly long line");
2153 if (memchr(data,'\0',recsz)) X_BAD_DATA("nul byte");
2154 if (!recsz) X_BAD_DATA("empty line");
2157 if (strspn(data," ") != recsz) X_BAD_DATA("line partially blanked");
2158 ipf->readcount_blank++;
2159 return OOP_CONTINUE;
2162 char *space= strchr(data,' ');
2163 int tokenlen= space-data;
2164 int midlen= (int)recsz-tokenlen-1;
2165 if (midlen <= 2) X_BAD_DATA("no room for messageid");
2166 if (space[1]!='<' || space[midlen]!='>') X_BAD_DATA("invalid messageid");
2168 if (tokenlen != sizeof(TOKEN)*2+2) X_BAD_DATA("token wrong length");
2169 memcpy(tokentextbuf, data, tokenlen);
2170 tokentextbuf[tokenlen]= 0;
2171 if (!IsToken(tokentextbuf)) X_BAD_DATA("token wrong syntax");
2173 ipf->readcount_ok++;
2175 art= xmalloc(sizeof(*art) - 1 + midlen + 1);
2176 memset(art,0,sizeof(*art));
2177 art->state= art_Unchecked;
2178 art->midlen= midlen;
2179 art->ipf= ipf; ipf->inprogress++;
2180 art->token= TextToToken(tokentextbuf);
2181 art->offset= old_offset;
2182 art->blanklen= recsz;
2183 strcpy(art->messageid, space+1);
2184 LIST_ADDTAIL(ipf->queue, art);
2186 if (ipf->autodefer >= 0)
2187 article_autodefer(ipf, art);
2188 else if (ipf==backlog_input_file)
2189 article_check_expired(art);
2191 if (sms==sm_NORMAL && ipf==main_input_file &&
2192 ipf->offset >= target_max_feedfile_size)
2193 statemc_start_flush("feed file size");
2195 check_assign_articles(); /* may destroy conn but that's OK */
2196 check_reading_pause_resume(ipf);
2197 return OOP_CONTINUE;
2200 /*========== tailing input file ==========*/
2202 static void *tailing_rable_call_time(oop_source *loop, struct timeval tv,
2204 /* lifetime of ipf here is OK because destruction will cause
2205 * on_cancel which will cancel this callback */
2206 InputFile *ipf= user;
2208 if (!ipf->fake_readable) return OOP_CONTINUE;
2210 /* we just keep calling readable until our caller (oop_rd)
2211 * has called try_read, and try_read has found EOF so given EAGAIN */
2212 loop->on_time(loop, OOP_TIME_NOW, tailing_rable_call_time, ipf);
2214 return ipf->readable_callback(loop, &ipf->readable,
2215 ipf->readable_callback_user);
2218 static void tailing_on_cancel(struct oop_readable *rable) {
2219 InputFile *ipf= (void*)rable;
2221 if (ipf->filemon) filemon_stop(ipf);
2222 loop->cancel_time(loop, OOP_TIME_NOW, tailing_rable_call_time, ipf);
2223 ipf->readable_callback= 0;
2226 static void tailing_make_readable(InputFile *ipf) {
2227 if (!ipf || !ipf->readable_callback) /* so callers can be naive */
2229 ipf->fake_readable= 1;
2230 loop->on_time(loop, OOP_TIME_NOW, tailing_rable_call_time, ipf);
2233 static int tailing_on_readable(struct oop_readable *rable,
2234 oop_readable_call *cb, void *user) {
2235 InputFile *ipf= (void*)rable;
2237 tailing_on_cancel(rable);
2238 ipf->readable_callback= cb;
2239 ipf->readable_callback_user= user;
2241 tailing_make_readable(ipf);
2245 static ssize_t tailing_try_read(struct oop_readable *rable, void *buffer,
2247 InputFile *ipf= (void*)rable;
2249 ssize_t r= read(ipf->fd, buffer, length);
2251 if (errno==EINTR) continue;
2252 ipf->fake_readable= 0;
2256 if (ipf==main_input_file) {
2258 ipf->fake_readable= 0;
2260 } else if (ipf==flushing_input_file) {
2262 assert(sms==sm_SEPARATED || sms==sm_DROPPING);
2263 } else if (ipf==backlog_input_file) {
2273 /*---------- filemon implemented with inotify ----------*/
2275 #if defined(HAVE_SYS_INOTIFY_H) && !defined(HAVE_FILEMON)
2276 #define HAVE_FILEMON
2278 #include <sys/inotify.h>
2280 static int filemon_inotify_fd;
2281 static int filemon_inotify_wdmax;
2282 static InputFile **filemon_inotify_wd2ipf;
2284 struct Filemon_Perfile {
2288 static void filemon_method_startfile(InputFile *ipf, Filemon_Perfile *pf) {
2289 int wd= inotify_add_watch(filemon_inotify_fd, ipf->path, IN_MODIFY);
2290 if (wd < 0) sysdie("inotify_add_watch %s", ipf->path);
2292 if (wd >= filemon_inotify_wdmax) {
2294 filemon_inotify_wd2ipf= xrealloc(filemon_inotify_wd2ipf,
2295 sizeof(*filemon_inotify_wd2ipf) * newmax);
2296 memset(filemon_inotify_wd2ipf + filemon_inotify_wdmax, 0,
2297 sizeof(*filemon_inotify_wd2ipf) * (newmax - filemon_inotify_wdmax));
2298 filemon_inotify_wdmax= newmax;
2301 assert(!filemon_inotify_wd2ipf[wd]);
2302 filemon_inotify_wd2ipf[wd]= ipf;
2304 dbg("filemon inotify startfile %p wd=%d wdmax=%d",
2305 ipf, wd, filemon_inotify_wdmax);
2310 static void filemon_method_stopfile(InputFile *ipf, Filemon_Perfile *pf) {
2312 dbg("filemon inotify stopfile %p wd=%d", ipf, wd);
2313 int r= inotify_rm_watch(filemon_inotify_fd, wd);
2314 if (r) syscrash("inotify_rm_watch");
2315 filemon_inotify_wd2ipf[wd]= 0;
2318 static void *filemon_inotify_readable(oop_source *lp, int fd,
2319 oop_event e, void *u) {
2320 struct inotify_event iev;
2322 int r= read(filemon_inotify_fd, &iev, sizeof(iev));
2324 if (isewouldblock(errno)) break;
2325 syscrash("read from inotify master");
2326 } else if (r==sizeof(iev)) {
2327 assert(iev.wd >= 0 && iev.wd < filemon_inotify_wdmax);
2329 crash("inotify read %d bytes wanted struct of %d", r, (int)sizeof(iev));
2331 InputFile *ipf= filemon_inotify_wd2ipf[iev.wd];
2332 /*dbg("filemon inotify readable read %p wd=%d", ipf, iev.wd);*/
2333 tailing_make_readable(ipf);
2335 return OOP_CONTINUE;
2338 static int filemon_method_init(void) {
2339 filemon_inotify_fd= inotify_init();
2340 if (filemon_inotify_fd<0) {
2341 syswarn("filemon/inotify: inotify_init failed");
2344 msetnonblock(filemon_inotify_fd, 1);
2345 loop->on_fd(loop, filemon_inotify_fd, OOP_READ, filemon_inotify_readable, 0);
2347 dbg("filemon inotify init filemon_inotify_fd=%d", filemon_inotify_fd);
2351 static void filemon_method_dump_info(FILE *f) {
2353 fprintf(f,"inotify");
2354 DUMPV("%d",,filemon_inotify_fd);
2355 DUMPV("%d",,filemon_inotify_wdmax);
2356 for (i=0; i<filemon_inotify_wdmax; i++)
2357 fprintf(f," wd2ipf[%d]=%p\n", i, filemon_inotify_wd2ipf[i]);
2360 #endif /* HAVE_INOTIFY && !HAVE_FILEMON */
2362 /*---------- filemon dummy implementation ----------*/
2364 #if !defined(HAVE_FILEMON)
2366 struct Filemon_Perfile { int dummy; };
2368 static int filemon_method_init(void) {
2369 warn("filemon/dummy: no filemon method compiled in");
2372 static void filemon_method_startfile(InputFile *ipf, Filemon_Perfile *pf) { }
2373 static void filemon_method_stopfile(InputFile *ipf, Filemon_Perfile *pf) { }
2374 static void filemon_method_dump_info(FILE *f) { fprintf(f,"dummy\n"); }
2376 #endif /* !HAVE_FILEMON */
2378 /*---------- filemon generic interface ----------*/
2380 static void filemon_start(InputFile *ipf) {
2381 assert(!ipf->filemon);
2384 filemon_method_startfile(ipf, ipf->filemon);
2387 static void filemon_stop(InputFile *ipf) {
2388 if (!ipf->filemon) return;
2389 filemon_method_stopfile(ipf, ipf->filemon);
2394 /*---------- interface to start and stop an input file ----------*/
2396 static const oop_rd_style feedfile_rdstyle= {
2397 OOP_RD_DELIM_STRIP, '\n',
2399 OOP_RD_SHORTREC_LONG,
2402 static void inputfile_reading_resume(InputFile *ipf) {
2403 if (!ipf->rd) return;
2404 if (!ipf->paused) return;
2406 int r= oop_rd_read(ipf->rd, &feedfile_rdstyle, MAX_LINE_FEEDFILE,
2407 feedfile_got_article,ipf, feedfile_read_err, ipf);
2408 if (r) syscrash("unable start reading feedfile %s",ipf->path);
2413 static void inputfile_reading_pause(InputFile *ipf) {
2414 if (!ipf->rd) return;
2415 if (ipf->paused) return;
2416 oop_rd_cancel(ipf->rd);
2420 static void inputfile_reading_start(InputFile *ipf) {
2422 ipf->readable.on_readable= tailing_on_readable;
2423 ipf->readable.on_cancel= tailing_on_cancel;
2424 ipf->readable.try_read= tailing_try_read;
2425 ipf->readable.delete_tidy= 0; /* we never call oop_rd_delete_{tidy,kill} */
2426 ipf->readable.delete_kill= 0;
2428 ipf->readable_callback= 0;
2429 ipf->readable_callback_user= 0;
2431 ipf->rd= oop_rd_new(loop, &ipf->readable, 0,0);
2435 inputfile_reading_resume(ipf);
2438 static void inputfile_reading_stop(InputFile *ipf) {
2440 inputfile_reading_pause(ipf);
2441 oop_rd_delete(ipf->rd);
2443 assert(!ipf->filemon); /* we shouldn't be monitoring it now */
2447 /*========== interaction with innd - state machine ==========*/
2449 /* See official state diagram at top of file. We implement
2460 |`---------------------------------------------------.
2462 |`---------------- - - - |
2463 D ENOENT | D EXISTS see OVERALL STATES diagram |
2464 | for full startup logic |
2467 | ============ try to |
2473 | | F IS SO BIG WE SHOULD FLUSH, OR TIMEOUT |
2474 ^ | hardlink F to D |
2477 | | our handle onto F is now onto D |
2480 | |<-------------------<---------------------<---------+
2482 | | spawn inndcomm flush |
2484 | ================== |
2485 | FLUSHING[-ABSENT] |
2487 | main D tail/none |
2488 | ================== |
2490 | | INNDCOMM FLUSH FAILS ^
2491 | |`----------------------->----------. |
2493 | | NO SUCH SITE V |
2494 ^ |`--------------->----. ==================== |
2495 | | \ FLUSHFAILED[-ABSENT] |
2497 | | FLUSH OK \ main D tail/none |
2498 | | open F \ ==================== |
2500 | | \ | TIME TO RETRY |
2501 | |`------->----. ,---<---'\ `----------------'
2502 | | D NONE | | D NONE `----.
2504 | ============= V V ============
2505 | SEPARATED-1 | | DROPPING-1
2506 | flsh->rd!=0 | | flsh->rd!=0
2507 | [Separated] | | [Dropping]
2508 | main F idle | | main none
2509 | flsh D tail | | flsh D tail
2510 | ============= | | ============
2512 ^ | EOF ON D | | defer | EOF ON D
2514 | =============== | | ===============
2515 | SEPARATED-2 | | DROPPING-2
2516 | flsh->rd==0 | V flsh->rd==0
2517 | [Finishing] | | [Dropping]
2518 | main F tail | `. main none
2519 | flsh D closed | `. flsh D closed
2520 | =============== V `. ===============
2522 | | ALL D PROCESSED `. | ALL D PROCESSED
2523 | V install defer as backlog `. | install defer
2524 ^ | close D `. | close D
2525 | | unlink D `. | unlink D
2528 `----------' ==============
2548 static void startup_set_input_file(InputFile *f) {
2549 assert(!main_input_file);
2551 inputfile_reading_start(f);
2554 static void statemc_lock(void) {
2556 struct stat stab, stabf;
2559 lockfd= open(path_lock, O_CREAT|O_RDWR, 0600);
2560 if (lockfd<0) sysdie("open lockfile %s", path_lock);
2563 memset(&fl,0,sizeof(fl));
2565 fl.l_whence= SEEK_SET;
2566 int r= fcntl(lockfd, F_SETLK, &fl);
2568 if (errno==EACCES || isewouldblock(errno)) {
2569 if (quiet_multiple) exit(0);
2570 die("another duct holds the lockfile");
2572 sysdie("fcntl F_SETLK lockfile %s", path_lock);
2575 mfstat_isreg(lockfd, &stabf, path_lock, "lockfile");
2577 mlstat_isreg(path_lock, &stab, &lock_noent, "lockfile");
2579 if (!lock_noent && samefile(&stab, &stabf))
2582 mclose(lockfd, "stale lockfile ", path_lock);
2585 FILE *lockfile= fdopen(lockfd, "w");
2586 if (!lockfile) syscrash("fdopen lockfile");
2588 int r= ftruncate(lockfd, 0);
2589 if (r) syscrash("truncate lockfile to write new info");
2591 if (fprintf(lockfile, "pid %ld\nsite %s\nfeedfile %s\nfqdn %s\n",
2592 (unsigned long)self_pid,
2593 sitename, feedfile, remote_host) == EOF ||
2595 sysdie("write info to lockfile %s", path_lock);
2597 dbg("startup: locked");
2600 static void statemc_init(void) {
2601 struct stat stabdefer;
2603 search_backlog_file();
2606 mlstat_isreg(path_defer, &stabdefer, &defer_noent, "defer file");
2608 dbg("startup: ductdefer ENOENT");
2610 dbg("startup: ductdefer nlink=%ld", (long)stabdefer.st_nlink);
2611 switch (stabdefer.st_nlink==1) {
2613 open_defer(); /* so that we will later close it and rename it */
2616 munlink(path_defer, "stale defer file link"
2617 " (presumably hardlink to backlog file)");
2620 crash("defer file %s has unexpected link count %d",
2621 path_defer, stabdefer.st_nlink);
2625 struct stat stab_f, stab_d;
2628 InputFile *file_d= open_input_file(path_flushing);
2629 if (file_d) mfstat_isreg(file_d->fd, &stab_d, path_flushing,"flushing file");
2631 mlstat_isreg(feedfile, &stab_f, &noent_f, "feedfile");
2633 if (!noent_f && file_d && samefile(&stab_f, &stab_d)) {
2634 dbg("startup: F==D => Hardlinked");
2635 munlink(feedfile, "feed file (during startup)"); /* => Moved */
2640 dbg("startup: F ENOENT => Moved");
2641 if (file_d) startup_set_input_file(file_d);
2642 spawn_inndcomm_flush("feedfile missing at startup");
2643 /* => Flushing, sms:=FLUSHING */
2646 dbg("startup: F!=D => Separated");
2647 startup_set_input_file(file_d);
2648 flushing_input_file= main_input_file;
2649 main_input_file= open_input_file(feedfile);
2650 if (!main_input_file) crash("feedfile vanished during startup");
2651 SMS(SEPARATED, max_separated_periods,
2652 "found both old and current feed files");
2654 dbg("startup: F exists, D ENOENT => Normal");
2655 InputFile *file_f= open_input_file(feedfile);
2656 if (!file_f) crash("feed file vanished during startup");
2657 startup_set_input_file(file_f);
2658 SMS(NORMAL, spontaneous_flush_periods, "normal startup");
2663 static void statemc_start_flush(const char *why) { /* Normal => Flushing */
2664 assert(sms == sm_NORMAL);
2666 dbg("starting flush (%s) (%lu >?= %lu) (%d)",
2668 (unsigned long)(main_input_file ? main_input_file->offset : 0),
2669 (unsigned long)target_max_feedfile_size,
2672 int r= link(feedfile, path_flushing);
2673 if (r) sysdie("link feedfile %s to flushing file %s",
2674 feedfile, path_flushing);
2677 munlink(feedfile, "old feedfile link");
2680 spawn_inndcomm_flush(why); /* => Flushing FLUSHING */
2683 static int trigger_flush_ok(const char *why) {
2687 statemc_start_flush(why ? why : "periodic");
2688 return 1; /* Normal => Flushing; => FLUSHING */
2690 case sm_FLUSHFAILED:
2691 spawn_inndcomm_flush(why ? why : "retry");
2692 return 1; /* Moved => Flushing; => FLUSHING */
2696 warn("abandoning old feedfile after flush (%s), autodeferring",
2697 why ? why : "took too long to complete");
2698 assert(flushing_input_file);
2699 autodefer_input_file(flushing_input_file);
2707 static void statemc_period_poll(void) {
2708 if (!until_flush) return;
2710 assert(until_flush>=0);
2712 if (until_flush) return;
2713 int ok= trigger_flush_ok(0);
2717 static int inputfile_is_done(InputFile *ipf) {
2719 if (ipf->inprogress) return 0; /* new article in the meantime */
2720 if (ipf->rd) return 0; /* not had EOF */
2724 static void notice_processed(InputFile *ipf, int completed,
2725 const char *what, const char *spec) {
2726 if (!ipf) return; /* allows preterminate to be lazy */
2728 #define RCI_NOTHING(x) /* nothing */
2729 #define RCI_TRIPLE_FMT(x) " " #x "=" RCI_TRIPLE_FMT_BASE
2730 #define RCI_TRIPLE_VALS(x) , RCI_TRIPLE_VALS_BASE(ipf->counts, [RC_##x])
2732 #define CNT(art,rc) (ipf->counts[art_##art][RC_##rc])
2734 char *inprog= completed
2735 ? masprintf("%s","") /* GCC produces a stupid warning for printf("") ! */
2736 : masprintf(" inprogress=%ld", ipf->inprogress);
2737 char *autodefer= ipf->autodefer >= 0
2738 ? masprintf(" autodeferred=%ld", ipf->autodefer)
2739 : masprintf("%s","");
2741 info("%s %s%s read=%d (+bl=%d,+err=%d)%s%s"
2742 " missing=%d offered=%d (ch=%d,nc=%d) accepted=%d (ch=%d,nc=%d)"
2743 RESULT_COUNTS(RCI_NOTHING, RCI_TRIPLE_FMT)
2745 completed?"completed":"processed", what, spec,
2746 ipf->readcount_ok, ipf->readcount_blank, ipf->readcount_err,
2747 inprog, autodefer, ipf->count_nooffer_missing,
2748 CNT(Unchecked,sent) + CNT(Unsolicited,sent)
2749 , CNT(Unchecked,sent), CNT(Unsolicited,sent),
2750 CNT(Wanted,accepted) + CNT(Unsolicited,accepted)
2751 , CNT(Wanted,accepted), CNT(Unsolicited,accepted)
2752 RESULT_COUNTS(RCI_NOTHING, RCI_TRIPLE_VALS)
2761 static void statemc_check_backlog_done(void) {
2762 InputFile *ipf= backlog_input_file;
2763 if (!inputfile_is_done(ipf)) return;
2765 const char *slash= strrchr(ipf->path, '/');
2766 const char *leaf= slash ? slash+1 : ipf->path;
2767 const char *under= strchr(slash, '_');
2768 const char *rest= under ? under+1 : leaf;
2769 if (!strncmp(rest,"backlog",7)) rest += 7;
2770 notice_processed(ipf,1,"backlog ",rest);
2772 close_input_file(ipf);
2773 if (unlink(ipf->path)) {
2774 if (errno != ENOENT)
2775 syscrash("could not unlink processed backlog file %s", ipf->path);
2776 warn("backlog file %s vanished while we were reading it"
2777 " so we couldn't remove it (but it's done now, anyway)",
2781 backlog_input_file= 0;
2782 search_backlog_file();
2786 static void statemc_check_flushing_done(void) {
2787 InputFile *ipf= flushing_input_file;
2788 if (!inputfile_is_done(ipf)) return;
2790 assert(sms==sm_SEPARATED || sms==sm_DROPPING);
2792 notice_processed(ipf,1,"feedfile","");
2796 munlink(path_flushing, "old flushing file");
2798 close_input_file(flushing_input_file);
2799 free(flushing_input_file);
2800 flushing_input_file= 0;
2802 if (sms==sm_SEPARATED) {
2803 notice("flush complete");
2804 SMS(NORMAL, spontaneous_flush_periods, "flush complete");
2805 } else if (sms==sm_DROPPING) {
2806 SMS(DROPPED, max_separated_periods, "old flush complete");
2807 search_backlog_file();
2808 notice("feed dropped, but will continue until backlog is finished");
2812 static void *statemc_check_input_done(oop_source *lp, struct timeval now,
2814 assert(!inputfile_is_done(main_input_file));
2815 statemc_check_flushing_done();
2816 statemc_check_backlog_done();
2817 return OOP_CONTINUE;
2820 static void queue_check_input_done(void) {
2821 loop->on_time(loop, OOP_TIME_NOW, statemc_check_input_done, 0);
2824 static void statemc_setstate(StateMachineState newsms, int periods,
2825 const char *forlog, const char *why) {
2827 until_flush= periods;
2829 const char *xtra= "";
2832 case sm_FLUSHFAILED:
2833 if (!main_input_file) xtra= "-ABSENT";
2837 xtra= flushing_input_file->rd ? "-1" : "-2";
2843 info("state %s%s[%d] %s",forlog,xtra,periods,why);
2845 info("state %s%s %s",forlog,xtra,why);
2849 /*---------- defer and backlog files ----------*/
2851 static void open_defer(void) {
2856 defer= fopen(path_defer, "a+");
2857 if (!defer) sysdie("could not open defer file %s", path_defer);
2859 /* truncate away any half-written records */
2861 mfstat_isreg(fileno(defer), &stab, path_defer, "newly opened defer file");
2863 if (stab.st_size > LONG_MAX)
2864 crash("defer file %s size is far too large", path_defer);
2869 long orgsize= stab.st_size;
2870 long truncto= stab.st_size;
2872 if (!truncto) break; /* was only (if anything) one half-truncated record */
2873 if (fseek(defer, truncto-1, SEEK_SET) < 0)
2874 syscrash("seek in defer file %s while truncating partial", path_defer);
2879 syscrash("failed read from defer file %s", path_defer);
2881 crash("defer file %s shrank while we were checking it!", path_defer);
2887 if (stab.st_size != truncto) {
2888 warn("truncating half-record at end of defer file %s -"
2889 " shrinking by %ld bytes from %ld to %ld",
2890 path_defer, orgsize - truncto, orgsize, truncto);
2893 sysdie("could not flush defer file %s", path_defer);
2894 if (ftruncate(fileno(defer), truncto))
2895 syscrash("could not truncate defer file %s", path_defer);
2898 info("continuing existing defer file %s (%ld bytes)",
2899 path_defer, orgsize);
2901 if (fseek(defer, truncto, SEEK_SET))
2902 syscrash("could not seek to new end of defer file %s", path_defer);
2905 static void close_defer(void) {
2910 mfstat_isreg(fileno(defer), &stab, path_defer, "defer file");
2912 if (fclose(defer)) sysdie("could not close defer file %s", path_defer);
2915 time_t now= mtime();
2917 char *backlog= masprintf("%s_backlog_%lu.%lu", feedfile,
2919 (unsigned long)stab.st_ino);
2920 if (link(path_defer, backlog))
2921 sysdie("could not install defer file %s as backlog file %s",
2922 path_defer, backlog);
2923 if (unlink(path_defer))
2924 syscrash("could not unlink old defer link %s to backlog file %s",
2925 path_defer, backlog);
2929 if (until_backlog_nextscan < 0 ||
2930 until_backlog_nextscan > backlog_retry_minperiods + 1)
2931 until_backlog_nextscan= backlog_retry_minperiods + 1;
2934 static void poll_backlog_file(void) {
2935 if (until_backlog_nextscan < 0) return;
2936 if (until_backlog_nextscan-- > 0) return;
2937 search_backlog_file();
2940 static void search_backlog_file(void) {
2941 /* returns non-0 iff there are any backlog files */
2946 const char *oldest_path=0;
2947 time_t oldest_mtime=0, now;
2949 if (backlog_input_file) return;
2953 r= glob(globpat_backlog, GLOB_ERR|GLOB_MARK|GLOB_NOSORT, 0, &gl);
2957 sysdie("failed to expand backlog pattern %s", globpat_backlog);
2959 die("out of memory expanding backlog pattern %s", globpat_backlog);
2961 for (i=0; i<gl.gl_pathc; i++) {
2962 const char *path= gl.gl_pathv[i];
2964 if (strchr(path,'#') || strchr(path,'~')) {
2965 dbg("backlog file search skipping %s", path);
2968 r= stat(path, &stab);
2970 syswarn("failed to stat backlog file %s", path);
2973 if (!S_ISREG(stab.st_mode)) {
2974 warn("backlog file %s is not a plain file (or link to one)", path);
2977 if (!oldest_path || stab.st_mtime < oldest_mtime) {
2979 oldest_mtime= stab.st_mtime;
2982 case GLOB_NOMATCH: /* fall through */
2985 syscrash("glob expansion of backlog pattern %s gave unexpected"
2986 " nonzero (error?) return value %d", globpat_backlog, r);
2990 dbg("backlog scan: none");
2992 if (sms==sm_DROPPED) {
2994 notice("feed dropped and our work is complete");
2996 int r= unlink(path_cli);
2997 if (r && errno!=ENOENT)
2998 syswarn("failed to unlink cli socket for old feed");
3000 munlink(path_lock, "lockfile for old feed");
3003 until_backlog_nextscan= backlog_spontrescan_periods;
3008 double age= difftime(now, oldest_mtime);
3009 long age_deficiency= (backlog_retry_minperiods * period_seconds) - age;
3011 if (age_deficiency <= 0) {
3012 dbg("backlog scan: found age=%f deficiency=%ld oldest=%s",
3013 age, age_deficiency, oldest_path);
3015 backlog_input_file= open_input_file(oldest_path);
3016 if (!backlog_input_file) {
3017 warn("backlog file %s vanished as we opened it", oldest_path);
3021 inputfile_reading_start(backlog_input_file);
3022 until_backlog_nextscan= -1;
3026 until_backlog_nextscan= age_deficiency / period_seconds;
3028 if (backlog_spontrescan_periods >= 0 &&
3029 until_backlog_nextscan > backlog_spontrescan_periods)
3030 until_backlog_nextscan= backlog_spontrescan_periods;
3032 dbg("backlog scan: young age=%f deficiency=%ld nextscan=%d oldest=%s",
3033 age, age_deficiency, until_backlog_nextscan, oldest_path);
3040 /*---------- shutdown and signal handling ----------*/
3042 static void preterminate(void) {
3043 if (in_child) return;
3044 notice_processed(main_input_file,0,"feedfile","");
3045 notice_processed(flushing_input_file,0,"flushing","");
3046 if (backlog_input_file)
3047 notice_processed(backlog_input_file,0, "backlog file ",
3048 backlog_input_file->path);
3051 static int signal_self_pipe[2];
3052 static sig_atomic_t terminate_sig_flag;
3054 static void raise_default(int signo) {
3055 msigsetdefault(signo);
3060 static void *sigarrived_event(oop_source *lp, int fd, oop_event e, void *u) {
3061 assert(fd=signal_self_pipe[0]);
3063 int r= read(signal_self_pipe[0], buf, sizeof(buf));
3064 if (r<0 && !isewouldblock(errno))
3065 syscrash("failed to read signal self pipe");
3066 if (r==0) crash("eof on signal self pipe");
3067 if (terminate_sig_flag) {
3069 notice("terminating (%s)", strsignal(terminate_sig_flag));
3070 raise_default(terminate_sig_flag);
3072 return OOP_CONTINUE;
3075 static void sigarrived_handler(int signum) {
3080 if (!terminate_sig_flag) terminate_sig_flag= signum;
3085 write(signal_self_pipe[1],&x,1);
3088 static void init_signals(void) {
3089 if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
3090 syscrash("could not ignore SIGPIPE");
3092 if (pipe(signal_self_pipe)) sysdie("create self-pipe for signals");
3094 msetnonblock(signal_self_pipe[0],1);
3095 msetnonblock(signal_self_pipe[1],1);
3097 struct sigaction sa;
3098 memset(&sa,0,sizeof(sa));
3099 sa.sa_handler= sigarrived_handler;
3100 sa.sa_flags= SA_RESTART;
3101 msigaction(SIGTERM,&sa);
3102 msigaction(SIGINT,&sa);
3104 on_fd_read_except(signal_self_pipe[0], sigarrived_event);
3107 /*========== flushing the feed ==========*/
3109 static pid_t inndcomm_child;
3110 static int inndcomm_sentinel_fd;
3112 static void *inndcomm_event(oop_source *lp, int fd, oop_event e, void *u) {
3113 assert(inndcomm_child);
3114 assert(fd == inndcomm_sentinel_fd);
3115 int status= mwaitpid(&inndcomm_child, "inndcomm");
3118 cancel_fd_read_except(fd);
3119 mclose_perhaps(&fd, "inndcomm sentinel pipe",0);
3120 inndcomm_sentinel_fd= 0;
3122 assert(!flushing_input_file);
3124 if (WIFEXITED(status)) {
3125 switch (WEXITSTATUS(status)) {
3127 case INNDCOMMCHILD_ESTATUS_FAIL:
3130 case INNDCOMMCHILD_ESTATUS_NONESUCH:
3131 notice("feed has been dropped by innd, finishing up");
3132 flushing_input_file= main_input_file;
3133 tailing_make_readable(flushing_input_file);
3134 /* we probably previously returned EAGAIN from our fake read method
3135 * when in fact we were at EOF, so signal another readable event
3136 * so we actually see the EOF */
3140 if (flushing_input_file) {
3141 SMS(DROPPING, max_separated_periods,
3142 "feed dropped by innd, but must finish last flush");
3145 SMS(DROPPED, 0, "feed dropped by innd");
3146 search_backlog_file();
3148 return OOP_CONTINUE;
3152 flushing_input_file= main_input_file;
3153 tailing_make_readable(flushing_input_file);
3155 main_input_file= open_input_file(feedfile);
3156 if (!main_input_file)
3157 crash("flush succeeded but feedfile %s does not exist!"
3158 " (this probably means feedfile does not correspond"
3159 " to site %s in newsfeeds)", feedfile, sitename);
3161 if (flushing_input_file) {
3162 SMS(SEPARATED, max_separated_periods, "flush complete");
3165 SMS(NORMAL, spontaneous_flush_periods, "recovery flush complete");
3167 return OOP_CONTINUE;
3170 goto unexpected_exitstatus;
3173 } else if (WIFSIGNALED(status) && WTERMSIG(status) == SIGALRM) {
3174 warn("flush timed out trying to talk to innd");
3177 unexpected_exitstatus:
3178 report_child_status("inndcomm child", status);
3182 SMS(FLUSHFAILED, flushfail_retry_periods, "flush failed, will retry");
3183 return OOP_CONTINUE;
3186 static void inndcommfail(const char *what) {
3187 syswarn("error communicating with innd: %s failed: %s", what, ICCfailure);
3188 exit(INNDCOMMCHILD_ESTATUS_FAIL);
3191 void spawn_inndcomm_flush(const char *why) { /* Moved => Flushing */
3194 notice("flushing %s",why);
3196 assert(sms==sm_NORMAL || sms==sm_FLUSHFAILED);
3197 assert(!inndcomm_child);
3198 assert(!inndcomm_sentinel_fd);
3200 if (pipe(pipefds)) sysdie("create pipe for inndcomm child sentinel");
3202 inndcomm_child= mfork("inndcomm child");
3204 if (!inndcomm_child) {
3205 const char *flushargv[2]= { sitename, 0 };
3209 mclose(pipefds[0], "(in child) inndcomm sentinel parent's end",0);
3210 /* parent spots the autoclose of pipefds[1] when we die or exit */
3212 if (simulate_flush>=0) {
3213 warn("SIMULATING flush child status %d", simulate_flush);
3214 if (simulate_flush>128) raise(simulate_flush-128);
3215 else exit(simulate_flush);
3218 alarm(inndcomm_flush_timeout);
3219 r= ICCopen(); if (r) inndcommfail("connect");
3220 r= ICCcommand('f',flushargv,&reply); if (r<0) inndcommfail("transmit");
3221 if (!r) exit(0); /* yay! */
3223 if (!strcmp(reply, "1 No such site")) exit(INNDCOMMCHILD_ESTATUS_NONESUCH);
3224 syswarn("innd ctlinnd flush failed: innd said %s", reply);
3225 exit(INNDCOMMCHILD_ESTATUS_FAIL);
3230 mclose(pipefds[1], "inndcomm sentinel child's end",0);
3231 inndcomm_sentinel_fd= pipefds[0];
3232 assert(inndcomm_sentinel_fd);
3233 on_fd_read_except(inndcomm_sentinel_fd, inndcomm_event);
3235 SMS(FLUSHING, 0, why);
3238 /*========== main program ==========*/
3240 static void postfork_inputfile(InputFile *ipf) {
3242 mclose(ipf->fd, "(in child) input file ", ipf->path);
3245 static void postfork_stdio(FILE *f, const char *what, const char *what2) {
3246 /* we have no stdio streams that are buffered long-term */
3248 if (fclose(f)) syscrash("(in child) close %s%s", what, what2?what2:0);
3251 static void postfork(void) {
3254 msigsetdefault(SIGTERM);
3255 msigsetdefault(SIGINT);
3256 msigsetdefault(SIGPIPE);
3257 if (terminate_sig_flag) raise(terminate_sig_flag);
3259 postfork_inputfile(main_input_file);
3260 postfork_inputfile(flushing_input_file);
3264 conn_closefd(conn,"(in child) ");
3266 postfork_stdio(defer, "defer file ", path_defer);
3269 typedef struct Every Every;
3271 struct timeval interval;
3276 static void every_schedule(Every *e, struct timeval base);
3278 static void *every_happens(oop_source *lp, struct timeval base, void *e_v) {
3281 if (!e->fixed_rate) mgettimeofday(&base);
3282 every_schedule(e, base);
3283 return OOP_CONTINUE;
3286 static void every_schedule(Every *e, struct timeval base) {
3287 struct timeval when;
3288 timeradd(&base, &e->interval, &when);
3289 loop->on_time(loop, when, every_happens, e);
3292 static void every(int interval, int fixed_rate, void (*f)(void)) {
3293 NEW_DECL(Every *,e);
3294 e->interval.tv_sec= interval;
3295 e->interval.tv_usec= 0;
3296 e->fixed_rate= fixed_rate;
3299 mgettimeofday(&now);
3300 every_schedule(e, now);
3303 static void filepoll(void) {
3304 tailing_make_readable(main_input_file);
3305 tailing_make_readable(flushing_input_file);
3308 static char *dbg_report_ipf(InputFile *ipf) {
3309 if (!ipf) return masprintf("none");
3311 const char *slash= strrchr(ipf->path,'/');
3312 const char *path= slash ? slash+1 : ipf->path;
3314 return masprintf("%p/%s:queue=%d,ip=%ld,autodef=%ld,off=%ld,fd=%d%s%s%s",
3316 ipf->queue.count, ipf->inprogress, ipf->autodefer,
3317 (long)ipf->offset, ipf->fd,
3318 ipf->rd ? "" : ",!rd",
3319 ipf->skippinglong ? "*skiplong" : "",
3320 ipf->rd && ipf->paused ? "*paused" : "");
3323 static void period(void) {
3324 char *dipf_main= dbg_report_ipf(main_input_file);
3325 char *dipf_flushing= dbg_report_ipf(flushing_input_file);
3326 char *dipf_backlog= dbg_report_ipf(backlog_input_file);
3329 " sms=%s[%d] conns=%d until_connect=%d"
3330 " input_files main:%s flushing:%s backlog:%s[%d]"
3331 " children connecting=%ld inndcomm=%ld lowvol_total=%d"
3333 sms_names[sms], until_flush, conns.count, until_connect,
3334 dipf_main, dipf_flushing, dipf_backlog, until_backlog_nextscan,
3335 (long)connecting_child, (long)inndcomm_child, lowvol_total
3339 free(dipf_flushing);
3342 if (until_connect) until_connect--;
3344 inputfile_queue_check_expired(backlog_input_file);
3345 poll_backlog_file();
3346 if (!backlog_input_file) close_defer(); /* want to start on a new backlog */
3347 statemc_period_poll();
3348 check_assign_articles();
3353 /*========== dumping state ==========*/
3355 static void dump_article_list(FILE *f, const CliCommand *c,
3356 const ArticleList *al) {
3357 fprintf(f, " count=%d\n", al->count);
3358 if (!c->xval) return;
3360 int i; Article *art;
3361 for (i=0, art=LIST_HEAD(*al); art; i++, art=LIST_NEXT(art)) {
3362 fprintf(f," #%05d %-11s", i, artstate_names[art->state]);
3363 DUMPV("%p", art->,ipf);
3364 DUMPV("%d", art->,missing);
3365 DUMPV("%lu", (unsigned long)art->,offset);
3366 DUMPV("%d", art->,blanklen);
3367 DUMPV("%d", art->,midlen);
3368 fprintf(f, " %s %s\n", TokenToText(art->token), art->messageid);
3372 static void dump_input_file(FILE *f, const CliCommand *c,
3373 InputFile *ipf, const char *wh) {
3374 char *dipf= dbg_report_ipf(ipf);
3375 fprintf(f,"input %s %s", wh, dipf);
3379 DUMPV("%d", ipf->,readcount_ok);
3380 DUMPV("%d", ipf->,readcount_blank);
3381 DUMPV("%d", ipf->,readcount_err);
3382 DUMPV("%d", ipf->,count_nooffer_missing);
3386 ArtState state; const char *const *statename;
3387 for (state=0, statename=artstate_names; *statename; state++,statename++) {
3388 #define RC_DUMP_FMT(x) " " #x "=%d"
3389 #define RC_DUMP_VAL(x) ,ipf->counts[state][RC_##x]
3390 fprintf(f,"input %s counts %-11s"
3391 RESULT_COUNTS(RC_DUMP_FMT,RC_DUMP_FMT) "\n",
3393 RESULT_COUNTS(RC_DUMP_VAL,RC_DUMP_VAL));
3395 fprintf(f,"input %s queue", wh);
3396 dump_article_list(f,c,&ipf->queue);
3402 fprintf(cc->out, "dumping state to %s\n", path_dump);
3403 FILE *f= fopen(path_dump, "w");
3404 if (!f) { fprintf(cc->out, "failed: open: %s\n", strerror(errno)); return; }
3406 fprintf(f,"general");
3407 DUMPV("%s", sms_names,[sms]);
3408 DUMPV("%d", ,until_flush);
3409 DUMPV("%ld", (long),self_pid);
3410 DUMPV("%p", , defer);
3411 DUMPV("%d", , until_connect);
3412 DUMPV("%d", , until_backlog_nextscan);
3413 DUMPV("%d", , simulate_flush);
3414 fprintf(f,"\nnocheck");
3415 DUMPV("%#.10f", , accept_proportion);
3416 DUMPV("%d", , nocheck);
3417 DUMPV("%d", , nocheck_reported);
3420 fprintf(f,"special");
3421 DUMPV("%ld", (long),connecting_child);
3422 DUMPV("%d", , connecting_fdpass_sock);
3423 DUMPV("%d", , cli_master);
3426 fprintf(f,"lowvol");
3427 DUMPV("%d", , lowvol_circptr);
3428 DUMPV("%d", , lowvol_total);
3430 for (i=0; i<lowvol_periods; i++) {
3432 if (i==lowvol_circptr) fprintf(f,"*");
3433 fprintf(f,"%d",lowvol_perperiod[i]);
3437 fprintf(f,"filemon ");
3438 filemon_method_dump_info(f);
3440 dump_input_file(f,c, main_input_file, "main" );
3441 dump_input_file(f,c, flushing_input_file, "flushing");
3442 dump_input_file(f,c, backlog_input_file, "backlog" );
3444 fprintf(f,"conns count=%d\n", conns.count);
3449 fprintf(f,"C%d",conn->fd);
3450 DUMPV("%p",conn->,rd); DUMPV("%d",conn->,max_queue);
3451 DUMPV("%d",conn->,stream); DUMPV("\"%s\"",conn->,quitting);
3452 DUMPV("%d",conn->,since_activity);
3455 fprintf(f,"C%d waiting", conn->fd); dump_article_list(f,c,&conn->waiting);
3456 fprintf(f,"C%d priority",conn->fd); dump_article_list(f,c,&conn->priority);
3457 fprintf(f,"C%d sent", conn->fd); dump_article_list(f,c,&conn->sent);
3459 fprintf(f,"C%d xmit xmitu=%d\n", conn->fd, conn->xmitu);
3460 for (i=0; i<conn->xmitu; i++) {
3461 const struct iovec *iv= &conn->xmit[i];
3462 const XmitDetails *xd= &conn->xmitd[i];
3465 case xk_Const: dinfo= masprintf("Const"); break;
3466 case xk_Artdata: dinfo= masprintf("A%p", xd->info.sm_art); break;
3470 fprintf(f," #%03d %-11s l=%d %s\n", i, dinfo, iv->iov_len,
3471 sanitise(iv->iov_base, iv->iov_len));
3477 DUMPV("%s", , feedfile);
3478 DUMPV("%s", , path_cli);
3479 DUMPV("%s", , path_lock);
3480 DUMPV("%s", , path_flushing);
3481 DUMPV("%s", , path_defer);
3482 DUMPV("%s", , path_dump);
3483 DUMPV("%s", , globpat_backlog);
3486 if (!!ferror(f) + !!fclose(f)) {
3487 fprintf(cc->out, "failed: write: %s\n", strerror(errno));
3492 /*========== option parsing ==========*/
3494 static void vbadusage(const char *fmt, va_list al) NORET_PRINTF(1,0);
3495 static void vbadusage(const char *fmt, va_list al) {
3496 char *m= mvasprintf(fmt,al);
3497 fprintf(stderr, "bad usage: %s\n"
3498 "say --help for help, or read the manpage\n",
3500 if (interactive < 2)
3501 syslog(LOG_ERR,"innduct: invoked with bad usage: %s",m);
3505 /*---------- generic option parser ----------*/
3507 static void badusage(const char *fmt, ...) NORET_PRINTF(1,2);
3508 static void badusage(const char *fmt, ...) {
3515 of_seconds= 001000u,
3516 of_boolean= 002000u,
3519 typedef struct Option Option;
3520 typedef void OptionParser(const Option*, const char *val);
3524 const char *lng, *formarg;
3530 static void parse_options(const Option *options, char ***argvp) {
3531 /* on return *argvp is first non-option arg; argc is not updated */
3534 const char *arg= *++(*argvp);
3536 if (*arg != '-') break;
3537 if (!strcmp(arg,"--")) { arg= *++(*argvp); break; }
3539 while ((a= *++arg)) {
3543 char *equals= strchr(arg,'=');
3544 int len= equals ? (equals - arg) : strlen(arg);
3545 for (o=options; o->shrt || o->lng; o++)
3546 if (strlen(o->lng) == len && !memcmp(o->lng,arg,len))
3548 badusage("unknown long option --%s",arg);
3551 if (equals) badusage("option --%s does not take a value",o->lng);
3553 } else if (equals) {
3557 if (!arg) badusage("option --%s needs a value for %s",
3558 o->lng, o->formarg);
3561 break; /* eaten the whole argument now */
3563 for (o=options; o->shrt || o->lng; o++)
3566 badusage("unknown short option -%c",a);
3573 if (!arg) badusage("option -%c needs a value for %s",
3574 o->shrt, o->formarg);
3577 break; /* eaten the whole argument now */
3583 #define DELIMPERHAPS(delim,str) (str) ? (delim) : "", (str) ? (str) : ""
3585 static void print_options(const Option *options, FILE *f) {
3587 for (o=options; o->shrt || o->lng; o++) {
3588 char shrt[2] = { o->shrt, 0 };
3589 char *optspec= masprintf("%s%s%s%s%s",
3590 o->shrt ? "-" : "", shrt,
3591 o->shrt && o->lng ? "|" : "",
3592 DELIMPERHAPS("--", o->lng));
3593 fprintf(f, " %s%s%s\n", optspec, DELIMPERHAPS(" ", o->formarg));
3598 /*---------- specific option types ----------*/
3600 static void op_integer(const Option *o, const char *val) {
3603 unsigned long ul= strtoul(val,&ep,10);
3604 if (*ep || ep==val || errno || ul>INT_MAX)
3605 badusage("bad integer value for %s",o->lng);
3606 int *store= o->store;
3610 static void op_double(const Option *o, const char *val) {
3611 int *store= o->store;
3614 *store= strtod(val, &ep);
3615 if (*ep || ep==val || errno)
3616 badusage("bad floating point value for %s",o->lng);
3619 static void op_string(const Option *o, const char *val) {
3620 const char **store= o->store;
3624 static void op_seconds(const Option *o, const char *val) {
3625 int *store= o->store;
3629 double v= strtod(val,&ep);
3630 if (ep==val) badusage("bad time/duration value for %s",o->lng);
3632 if (!*ep || !strcmp(ep,"s") || !strcmp(ep,"sec")) unit= 1;
3633 else if (!strcmp(ep,"m") || !strcmp(ep,"min")) unit= 60;
3634 else if (!strcmp(ep,"h") || !strcmp(ep,"hour")) unit= 3600;
3635 else if (!strcmp(ep,"d") || !strcmp(ep,"day")) unit= 86400;
3636 else if (!strcmp(ep,"das")) unit= 10;
3637 else if (!strcmp(ep,"hs")) unit= 100;
3638 else if (!strcmp(ep,"ks")) unit= 1000;
3639 else if (!strcmp(ep,"Ms")) unit= 1000000;
3640 else badusage("bad units %s for time/duration value for %s",ep,o->lng);
3644 if (v > INT_MAX) badusage("time/duration value for %s out of range",o->lng);
3648 static void op_setint(const Option *o, const char *val) {
3649 int *store= o->store;
3653 /*---------- specific options ----------*/
3655 static void help(const Option *o, const char *val);
3657 static const Option innduct_options[]= {
3658 {'f',"feedfile", "F", &feedfile, op_string },
3659 {'q',"quiet-multiple", 0, &quiet_multiple, op_setint, 1 },
3660 {0,"no-daemon", 0, &interactive, op_setint, 1 },
3661 {0,"interactive", 0, &interactive, op_setint, 2 },
3662 {0,"no-streaming", 0, &try_stream, op_setint, 0 },
3663 {0,"no-filemon", 0, &try_filemon, op_setint, 0 },
3664 {'C',"inndconf", "F", &inndconffile, op_string },
3665 {'P',"port", "PORT", &port, op_integer },
3666 {0,"chdir", "DIR", &path_run, op_string },
3667 {0,"cli", "DIR/|PATH", &path_cli, op_string },
3668 {0,"help", 0, 0, help },
3670 {0,"max-connections", "N", &max_connections, op_integer },
3671 {0,"max-queue-per-conn", "N", &max_queue_per_conn, op_integer },
3672 {0,"max-queue-per-file", "N", &max_queue_per_ipf, op_integer },
3673 {0,"feedfile-flush-size","BYTES", &target_max_feedfile_size, op_integer },
3674 {0,"period-interval", "TIME", &period_seconds, op_seconds },
3676 {0,"connection-timeout", "TIME", &connection_setup_timeout, op_seconds },
3677 {0,"stuck-flush-timeout", "TIME", &inndcomm_flush_timeout, op_seconds },
3678 {0,"feedfile-poll", "TIME", &filepoll_seconds, op_seconds },
3680 {0,"no-check-proportion", "PERCENT", &nocheck_thresh, op_double },
3681 {0,"no-check-response-time","ARTICLES", &nocheck_decay, op_double },
3683 {0,"reconnect-interval", "PERIOD", &reconnect_delay_periods, op_seconds },
3684 {0,"flush-retry-interval", "PERIOD", &flushfail_retry_periods, op_seconds },
3685 {0,"earliest-deferred-retry","PERIOD", &backlog_retry_minperiods, op_seconds },
3686 {0,"backlog-rescan-interval","PERIOD",&backlog_spontrescan_periods,op_seconds},
3687 {0,"max-flush-interval", "PERIOD", &spontaneous_flush_periods,op_seconds },
3688 {0,"flush-finish-timeout", "PERIOD", &max_separated_periods, op_seconds },
3689 {0,"idle-timeout", "PERIOD", &need_activity_periods, op_seconds },
3690 {0,"low-volume-thresh", "PERIOD", &lowvol_thresh, op_integer },
3691 {0,"low-volume-window", "PERIOD", &lowvol_periods, op_seconds },
3693 {0,"max-bad-input-data-ratio","PERCENT", &max_bad_data_ratio, op_double },
3694 {0,"max-bad-input-data-init", "PERCENT", &max_bad_data_initial, op_integer },
3699 static void printusage(FILE *f) {
3700 fputs("usage: innduct [options] site [fqdn]\n"
3701 "available options are:\n", f);
3702 print_options(innduct_options, f);
3705 static void help(const Option *o, const char *val) {
3707 if (ferror(stdout) || fflush(stdout)) {
3708 perror("innduct: writing help");
3714 static void convert_to_periods_rndup(int *store) {
3715 *store += period_seconds-1;
3716 *store /= period_seconds;
3719 static int path_ends_slash(const char *specified) {
3720 int l= strlen(specified);
3722 return specified[l-1] == '/';
3725 int main(int argc, char **argv) {
3726 /* set up libinn logging */
3727 message_program_name= "innduct";
3728 message_fatal_cleanup= innduct_fatal_cleanup;
3729 INNLOGWRAPS(INNLOGWRAP_CALL)
3736 parse_options(innduct_options, &argv);
3741 if (!sitename) badusage("need site name argument");
3743 if (*argv) remote_host= *argv++;
3744 else remote_host= sitename;
3746 if (*argv) badusage("too many non-option arguments");
3750 int r= innconf_read(inndconffile);
3751 if (!r) badusage("could not read inn.conf");
3753 if (!remote_host) remote_host= sitename;
3755 if (nocheck_thresh < 0 || nocheck_thresh > 100)
3756 badusage("nocheck threshold percentage must be between 0..100");
3757 nocheck_thresh *= 0.01;
3759 if (nocheck_decay < 0.1)
3760 badusage("nocheck decay articles must be at least 0.1");
3761 nocheck_decay= pow(0.5, 1.0/nocheck_decay);
3763 convert_to_periods_rndup(&reconnect_delay_periods);
3764 convert_to_periods_rndup(&flushfail_retry_periods);
3765 convert_to_periods_rndup(&backlog_retry_minperiods);
3766 convert_to_periods_rndup(&backlog_spontrescan_periods);
3767 convert_to_periods_rndup(&spontaneous_flush_periods);
3768 convert_to_periods_rndup(&max_separated_periods);
3769 convert_to_periods_rndup(&need_activity_periods);
3770 convert_to_periods_rndup(&lowvol_periods);
3772 if (max_bad_data_ratio < 0 || max_bad_data_ratio > 100)
3773 badusage("bad input data ratio must be between 0..100");
3774 max_bad_data_ratio *= 0.01;
3777 path_run= innconf->pathrun;
3779 if (!feedfile) feedfile= sitename;
3780 if (!feedfile[0]) badusage("feed filename, if specified, must be nonempty");
3781 if (path_ends_slash(feedfile))
3782 feedfile= masprintf("%s%s", feedfile, sitename);
3783 if (feedfile[0] != '/')
3784 feedfile= masprintf("%s/%s", innconf->pathoutgoing, feedfile);
3787 path_cli_dir= "innduct";
3788 } else if (!path_cli[0] || !strcmp(path_cli,"none")) {
3789 path_cli= 0; /* ok, don't then */
3790 } else if (path_ends_slash(path_cli)) {
3791 path_cli_dir= masprintf("%.*s", strlen(path_cli)-1, path_cli);
3794 path_cli= masprintf("%s/%s", path_cli_dir, sitename);
3796 if (max_queue_per_ipf<0)
3797 max_queue_per_ipf= max_queue_per_conn * 2;
3799 const char *feedfile_forbidden= "?*[~#";
3801 while ((c= *feedfile_forbidden++))
3802 if (strchr(feedfile, c))
3803 badusage("feed filename may not contain metacharacter %c",c);
3806 lowvol_perperiod= xcalloc(sizeof(*lowvol_perperiod), lowvol_periods);
3807 for (i=0; i<lowvol_periods; i++) {
3808 lowvol_perperiod[i]= lowvol_thresh;
3809 lowvol_total += lowvol_thresh;
3811 lowvol_total -= lowvol_thresh;
3815 path_lock= masprintf("%s_lock", feedfile);
3816 path_flushing= masprintf("%s_flushing", feedfile);
3817 path_defer= masprintf("%s_defer", feedfile);
3818 path_dump= masprintf("%s_dump", feedfile);
3819 globpat_backlog= masprintf("%s_backlog*", feedfile);
3821 oop_source_sys *sysloop= oop_sys_new();
3822 if (!sysloop) syscrash("could not create liboop event loop");
3823 loop= (oop_source*)sysloop;
3827 if (interactive < 1) {
3829 for (i=3; i<255; i++)
3830 /* do this now before we open syslog, etc. */
3834 if (interactive < 2)
3835 openlog("innduct",LOG_NDELAY|LOG_PID,LOG_NEWS);
3837 if (interactive < 1) {
3838 int null= open("/dev/null",O_RDWR);
3839 if (null<0) sysdie("failed to open /dev/null");
3843 mclose(null, "/dev/null original fd",0);
3845 pid_t child1= mfork("daemonise first fork");
3846 if (child1) _exit(0);
3848 pid_t sid= setsid();
3849 if (sid == -1) sysdie("setsid failed");
3851 pid_t child2= mfork("daemonise second fork");
3852 if (child2) _exit(0);
3856 if (self_pid==-1) syscrash("getpid");
3859 if (r) sysdie("could not chdir to pathrun %s", path_run);
3868 r= SMsetup(SM_PREOPEN, &val); if (!r) warn("SMsetup SM_PREOPEN failed");
3869 r= SMinit(); if (!r) die("storage manager initialisation (SMinit) failed");
3871 if (interactive >= 2)
3878 notice("filemon: suppressed by command line option, polling");
3880 filemon_ok= filemon_method_init();
3882 warn("filemon: no file monitoring available, polling");
3885 every(filepoll_seconds,0,filepoll);
3887 every(period_seconds,1,period);
3893 void *run= oop_sys_run(sysloop);
3894 assert(run == OOP_ERROR);
3895 syscrash("event loop failed");