3 * - inotify not working ?
4 * - some per-conn info thing for control
5 * - option for realsockdir
6 * - option for no inotify
7 * - manpage: document control master stuff
10 * build-lfs/backends/innduct --no-daemon -f `pwd`/fee sit dom
14 * Newsfeeds file entries should look like this:
15 * host.name.of.site[/exclude,exclude,...]\
16 * :pattern,pattern...[/distribution,distribution...]\
20 * sitename[/exclude,exclude,...]\
21 * :pattern,pattern...[/distribution,distribution...]\
27 * or might be blanked out
28 * <spc><spc><spc><spc>....
30 * F site.name main feed file
31 * opened/created, then written, by innd
34 * tokens blanked out by duct when processed
35 * site.name_lock lock preventing multiple ducts
36 * to hold lock must open,F_SETLK[W]
37 * and then stat to check that locked file
38 * still has name site.name_lock
39 * holder of this lock is "duct"
40 * (only) lockholder may remove the lockfile
41 * D site.name_flushing temporary feed file during flush (or crash)
42 * hardlink created by duct
44 * site.name_defer 431'd articles, still being written,
45 * created, written, used by duct
47 * site.name_backlog.<date>.<inum>
48 * 431'd articles, ready for innxmit or duct
49 * created (link/mv) by duct
50 * site.name_backlog<anything-else> (where <anything-else> does not
51 * contain '#' or '~') eg
52 * site.name_backlog.manual
53 * anything the sysadmin likes (eg, feed files
54 * from old feeds to be merged into this one)
55 * created (link/mv) by admin
56 * may be symlinks (in which case links
57 * may be written through, but only links
60 * It is safe to remove backlog files manually,
61 * if it's desired to throw away the backlog.
63 * Backlog files are also processed by innduct. We find the oldest
64 * backlog file which is at least a certain amount old, and feed it
65 * back into our processing. When every article in it has been read
66 * and processed, we unlink it and look for another backlog file.
68 * If we don't have a backlog file that we're reading, we close the
69 * defer file that we're writing and make it into a backlog file at
70 * the first convenient opportunity.
81 | | <----------------<---------------------------------'|
87 | F: innd writing, duct reading |
90 | | duct decides time to flush |
91 | | duct makes hardlink |
93 | V <------------------------'|
95 | F == D: innd writing, duct reading both exist |
98 | | <-----------<-------------<--'|
102 | V <---------------------. |
105 | D: innd writing, duct reading; or ENOENT | |
107 | | duct requests flush of feed | |
108 | | (others can too, harmlessly) | |
112 | D: innd flushing, duct; or ENOENT | |
114 | | inndcomm flush fails | |
115 | |`-------------------------->------------------' |
117 | | inndcomm reports no such site |
118 | |`---------------------------------------------------- | -.
120 | | innd finishes writing D, creates F | |
121 | | inndcomm reports flush successful | |
124 | Separated <----------------' |
125 | F: innd writing F!=D /
126 | D: duct reading; or ENOENT both exist /
128 | | duct gets to the end of D /
129 | | duct opens F too /
132 | F: innd writing, duct reading |
133 | D: duct finishing V
135 | | duct finishes processing D F: ENOENT
136 | V duct unlinks D D: duct reading
138 `--<--' | duct finishes
148 "duct reading" means innduct is reading the file but also
149 overwriting processed tokens.
153 * rune for printing diagrams:
155 perl -ne 'print if m/-8\<-/..m/-\>8-/; print "\f" if m/-\^L-/' backends/innduct.c |a2ps -R -B -ops
160 /*============================== PROGRAM ==============================*/
162 #define _GNU_SOURCE 1
168 #include "inndcomm.h"
170 #include "inn/list.h"
171 #include "inn/innconf.h"
174 #include <sys/types.h>
175 #include <sys/wait.h>
176 #include <sys/stat.h>
177 #include <sys/socket.h>
196 #include <oop-read.h>
198 /*----- general definitions, probably best not changed -----*/
200 #define CONNCHILD_ESTATUS_STREAM 24
201 #define CONNCHILD_ESTATUS_NOSTREAM 25
203 #define INNDCOMMCHILD_ESTATUS_FAIL 26
204 #define INNDCOMMCHILD_ESTATUS_NONESUCH 27
206 #define MAX_LINE_FEEDFILE (NNTP_MSGID_MAXLEN + sizeof(TOKEN)*2 + 10)
207 #define MAX_CONTROL_COMMAND 1000
209 #define VA va_list al; va_start(al,fmt)
210 #define PRINTF(f,a) __attribute__((__format__(printf,f,a)))
211 #define NORET_PRINTF(f,a) __attribute__((__noreturn__,__format__(printf,f,a)))
213 /*----- doubly linked lists -----*/
215 #define ISNODE(T) struct node list_node
218 union { struct list li; T *for_type; } u; \
222 #define NODE(n) (assert((void*)&(n)->list_node == (n)), &(n)->list_node)
224 #define LIST_CHECKCANHAVENODE(l,n) \
225 ((void)((n) == ((l).u.for_type))) /* just for the type check */
227 #define LIST_ADDSOMEHOW(l,n,list_addsomehow) \
228 ( LIST_CHECKCANHAVENODE(l,n), \
229 list_addsomehow(&(l).u.li, NODE((n))), \
233 #define LIST_REMSOMEHOW(l,list_remsomehow) \
234 ( (typeof((l).u.for_type)) \
237 list_remsomehow(&(l).u.li) ) \
243 #define LIST_ADDHEAD(l,n) LIST_ADDSOMEHOW((l),(n),list_addhead)
244 #define LIST_ADDTAIL(l,n) LIST_ADDSOMEHOW((l),(n),list_addtail)
245 #define LIST_REMHEAD(l) LIST_REMSOMEHOW((l),list_remhead)
246 #define LIST_REMTAIL(l) LIST_REMSOMEHOW((l),list_remtail)
248 #define LIST_INIT(l) ((l).count=0, list_new(&(l).u.li))
249 #define LIST_HEAD(l) ((typeof((l).u.for_type))(list_head((struct list*)&(l))))
250 #define LIST_NEXT(n) ((typeof(n))list_succ(NODE((n))))
251 #define LIST_BACK(n) ((typeof(n))list_pred(NODE((n))))
253 #define LIST_REMOVE(l,n) \
254 ( LIST_CHECKCANHAVENODE(l,n), \
255 list_remove(NODE((n))), \
259 #define LIST_INSERT(l,n,pred) \
260 ( LIST_CHECKCANHAVENODE(l,n), \
261 LIST_CHECKCANHAVENODE(l,pred), \
262 list_insert((struct list*)&(l), NODE((n)), NODE((pred))), \
266 /*----- type predeclarations -----*/
268 typedef struct Conn Conn;
269 typedef struct Article Article;
270 typedef struct InputFile InputFile;
271 typedef struct XmitDetails XmitDetails;
272 typedef struct Filemon_Perfile Filemon_Perfile;
273 typedef enum StateMachineState StateMachineState;
278 /*----- function predeclarations -----*/
280 static void conn_maybe_write(Conn *conn);
281 static void conn_make_some_xmits(Conn *conn);
282 static void *conn_write_some_xmits(Conn *conn);
284 static void xmit_free(XmitDetails *d);
286 #define SMS(newstate, periods, why) \
287 (statemc_setstate(sm_##newstate,(periods),#newstate,(why)))
288 static void statemc_setstate(StateMachineState newsms, int periods,
289 const char *forlog, const char *why);
291 static void statemc_start_flush(const char *why); /* Normal => Flushing */
292 static void spawn_inndcomm_flush(const char *why); /* Moved => Flushing */
294 static void article_done(Conn *conn, Article *art, int whichcount);
296 static void check_assign_articles(void);
297 static void queue_check_input_done(void);
299 static void statemc_check_flushing_done(void);
300 static void statemc_check_backlog_done(void);
302 static void postfork(void);
303 static void period(void);
305 static void open_defer(void);
306 static void close_defer(void);
307 static void search_backlog_file(void);
309 static void inputfile_reading_start(InputFile *ipf);
310 static void inputfile_reading_stop(InputFile *ipf);
312 static void filemon_start(InputFile *ipf);
313 static void filemon_stop(InputFile *ipf);
314 static void filemon_callback(InputFile *ipf);
316 static void vconnfail(Conn *conn, const char *fmt, va_list al) PRINTF(2,0);
317 static void connfail(Conn *conn, const char *fmt, ...) PRINTF(2,3);
319 static const oop_rd_style peer_rd_style;
320 static oop_rd_call peer_rd_err, peer_rd_ok;
322 /*----- configuration options -----*/
323 /* when changing defaults, remember to update the manpage */
325 static const char *sitename, *remote_host;
326 static const char *feedfile, *realsockdir="/tmp/innduct.control";
327 static int quiet_multiple=0;
328 static int become_daemon=1;
329 static int try_stream=1;
331 static const char *inndconffile;
333 static int max_connections=10;
334 static int max_queue_per_conn=200;
335 static int target_max_feedfile_size=100000;
336 static int period_seconds=60;
337 static int filepoll_seconds=5;
339 static int connection_setup_timeout=200;
340 static int inndcomm_flush_timeout=100;
342 static double nocheck_thresh= 95.0; /* converted from percentage by main */
343 static double nocheck_decay= 100; /* conv'd from articles to lambda by main */
345 /* all these are initialised to seconds, and converted to periods in main */
346 static int reconnect_delay_periods=1000;
347 static int flushfail_retry_periods=1000;
348 static int backlog_retry_minperiods=50;
349 static int backlog_spontrescan_periods=300;
350 static int spontaneous_flush_periods=100000;
351 static int need_activity_periods=1000;
353 static double max_bad_data_ratio= 1; /* conv'd from percentage by main */
354 static int max_bad_data_initial= 30;
355 /* in one corrupt 4096-byte block the number of newlines has
356 * mean 16 and standard deviation 3.99. 30 corresponds to z=+3.5 */
359 /*----- statistics -----*/
361 typedef enum { /* in queue in conn->sent */
362 art_Unchecked, /* not checked, not sent checking */
363 art_Wanted, /* checked, wanted sent body as requested */
364 art_Unsolicited, /* - sent body without check */
368 #define RESULT_COUNTS(RCS,RCN) \
377 #define RCI_TRIPLE_FMT_BASE "%d (id=%d,bod=%d,nc=%d)"
378 #define RCI_TRIPLE_VALS_BASE(counts,x) \
379 counts[art_Unchecked] x \
380 + counts[art_Wanted] x \
381 + counts[art_Unsolicited] x, \
382 counts[art_Unchecked] x \
383 , counts[art_Wanted] x \
384 , counts[art_Unsolicited] x
387 #define RC_INDEX(x) RC_##x,
388 RESULT_COUNTS(RC_INDEX, RC_INDEX)
393 /*----- transmission buffers -----*/
398 xk_Malloc, xk_Const, xk_Artdata
410 /*----- core operational data structure types -----*/
413 /* This is also an instance of struct oop_readable */
414 struct oop_readable readable; /* first */
415 oop_readable_call *readable_callback;
416 void *readable_callback_user;
419 Filemon_Perfile *filemon;
421 oop_read *rd; /* non-0: reading; 0: constructing, or had EOF */
422 long inprogress; /* no. of articles read but not processed */
426 int counts[art_MaxState][RCI_max];
427 int readcount_ok, readcount_blank, readcount_err;
442 #define SMS_LIST(X) \
450 enum StateMachineState {
451 #define SMS_DEF_ENUM(s) sm_##s,
452 SMS_LIST(SMS_DEF_ENUM)
455 static const char *sms_names[]= {
456 #define SMS_DEF_NAME(s) #s ,
457 SMS_LIST(SMS_DEF_NAME)
463 int fd; /* may be 0, meaning closed (during construction/destruction) */
464 oop_read *rd; /* likewise */
465 int max_queue, stream, quitting;
466 int since_activity; /* periods */
467 ArticleList waiting; /* not yet told peer */
468 ArticleList priority; /* peer says send it now */
469 ArticleList sent; /* offered/transmitted - in xmit or waiting reply */
470 struct iovec xmit[CONNIOVS];
471 XmitDetails xmitd[CONNIOVS];
476 /*----- general operational variables -----*/
478 /* main initialises */
479 static oop_source *loop;
480 static ConnList conns;
481 static ArticleList queue;
482 static char *path_lock, *path_flushing, *path_defer, *path_control;
483 static char *globpat_backlog;
484 static pid_t self_pid;
486 /* statemc_init initialises */
487 static StateMachineState sms;
489 static InputFile *main_input_file, *flushing_input_file, *backlog_input_file;
490 static int sm_period_counter;
492 /* initialisation to 0 is good */
493 static int until_connect, until_backlog_nextscan, until_backup_filepoll;
494 static double accept_proportion;
495 static int nocheck, nocheck_reported;
497 /* for simulation, debugging, etc. */
498 int simulate_flush= -1;
500 /*========== logging ==========*/
502 static void logcore(int sysloglevel, const char *fmt, ...) PRINTF(2,3);
503 static void logcore(int sysloglevel, const char *fmt, ...) {
506 vsyslog(sysloglevel,fmt,al);
508 if (self_pid) fprintf(stderr,"[%lu] ",(unsigned long)self_pid);
509 vfprintf(stderr,fmt,al);
515 static void logv(int sysloglevel, const char *pfx, int errnoval,
516 const char *fmt, va_list al) PRINTF(5,0);
517 static void logv(int sysloglevel, const char *pfx, int errnoval,
518 const char *fmt, va_list al) {
519 char msgbuf[256]; /* NB do not call xvasprintf here or you'll recurse */
520 vsnprintf(msgbuf,sizeof(msgbuf), fmt,al);
521 msgbuf[sizeof(msgbuf)-1]= 0;
523 if (sysloglevel >= LOG_ERR && (errnoval==EACCES || errnoval==EPERM))
524 sysloglevel= LOG_ERR; /* run by wrong user, probably */
526 logcore(sysloglevel, "<%s>%s: %s%s%s",
527 sitename, pfx, msgbuf,
528 errnoval>=0 ? ": " : "",
529 errnoval>=0 ? strerror(errnoval) : "");
532 #define diewrap(fn, pfx, sysloglevel, err, estatus) \
533 static void fn(const char *fmt, ...) NORET_PRINTF(1,2); \
534 static void fn(const char *fmt, ...) { \
536 logv(sysloglevel, pfx, err, fmt, al); \
540 #define logwrap(fn, pfx, sysloglevel, err) \
541 static void fn(const char *fmt, ...) PRINTF(1,2); \
542 static void fn(const char *fmt, ...) { \
544 logv(sysloglevel, pfx, err, fmt, al); \
548 diewrap(sysdie, " critical", LOG_CRIT, errno, 16);
549 diewrap(die, " critical", LOG_CRIT, -1, 16);
551 diewrap(sysfatal, " fatal", LOG_ERR, errno, 12);
552 diewrap(fatal, " fatal", LOG_ERR, -1, 12);
554 logwrap(syswarn, " warning", LOG_WARNING, errno);
555 logwrap(warn, " warning", LOG_WARNING, -1);
557 logwrap(notice, " notice", LOG_NOTICE, -1);
558 logwrap(info, " info", LOG_INFO, -1);
559 logwrap(debug, " debug", LOG_DEBUG, -1);
562 /*========== utility functions etc. ==========*/
564 static char *xvasprintf(const char *fmt, va_list al) PRINTF(1,0);
565 static char *xvasprintf(const char *fmt, va_list al) {
567 int rc= vasprintf(&str,fmt,al);
568 if (rc<0) sysdie("vasprintf(\"%s\",...) failed", fmt);
571 static char *xasprintf(const char *fmt, ...) PRINTF(1,2);
572 static char *xasprintf(const char *fmt, ...) {
574 char *str= xvasprintf(fmt,al);
579 static int close_perhaps(int *fd) {
580 if (*fd <= 0) return 0;
585 static void xclose(int fd, const char *what, const char *what2) {
587 if (r) sysdie("close %s%s",what,what2?what2:"");
589 static void xclose_perhaps(int *fd, const char *what, const char *what2) {
590 if (*fd <= 0) return;
591 xclose(*fd,what,what2);
595 static pid_t xfork(const char *what) {
599 if (child==-1) sysfatal("cannot fork for %s",what);
600 debug("forked %s %ld", what, (unsigned long)child);
601 if (!child) postfork();
605 static void on_fd_read_except(int fd, oop_call_fd callback) {
606 loop->on_fd(loop, fd, OOP_READ, callback, 0);
607 loop->on_fd(loop, fd, OOP_EXCEPTION, callback, 0);
609 static void cancel_fd_read_except(int fd) {
610 loop->cancel_fd(loop, fd, OOP_READ);
611 loop->cancel_fd(loop, fd, OOP_EXCEPTION);
614 static void report_child_status(const char *what, int status) {
615 if (WIFEXITED(status)) {
616 int es= WEXITSTATUS(status);
618 warn("%s: child died with error exit status %d", what, es);
619 } else if (WIFSIGNALED(status)) {
620 int sig= WTERMSIG(status);
621 const char *sigstr= strsignal(sig);
622 const char *coredump= WCOREDUMP(status) ? " (core dumped)" : "";
624 warn("%s: child died due to fatal signal %s%s", what, sigstr, coredump);
626 warn("%s: child died due to unknown fatal signal %d%s",
627 what, sig, coredump);
629 warn("%s: child died with unknown wait status %d", what,status);
633 static int xwaitpid(pid_t *pid, const char *what) {
636 int r= kill(*pid, SIGKILL);
637 if (r) sysdie("cannot kill %s child", what);
639 pid_t got= waitpid(*pid, &status, 0);
640 if (got==-1) sysdie("cannot reap %s child", what);
641 if (got==0) die("cannot reap %s child", what);
648 static void xunlink(const char *path, const char *what) {
650 if (r) sysdie("can't unlink %s %s", path, what);
653 static time_t xtime(void) {
655 if (now==-1) sysdie("time(2) failed");
659 static void xgettimeofday(struct timeval *tv_r) {
660 int r= gettimeofday(tv_r,0);
661 if (r) sysdie("gettimeofday(2) failed");
664 static void xsetnonblock(int fd, int nonblocking) {
665 int errnoval= oop_fd_nonblock(fd, nonblocking);
666 if (errnoval) { errno= errnoval; sysdie("setnonblocking"); }
669 static void check_isreg(const struct stat *stab, const char *path,
671 if (!S_ISREG(stab->st_mode))
672 die("%s %s not a plain file (mode 0%lo)",
673 what, path, (unsigned long)stab->st_mode);
676 static void xfstat(int fd, struct stat *stab_r, const char *what) {
677 int r= fstat(fd, stab_r);
678 if (r) sysdie("could not fstat %s", what);
681 static void xfstat_isreg(int fd, struct stat *stab_r,
682 const char *path, const char *what) {
683 xfstat(fd, stab_r, what);
684 check_isreg(stab_r, path, what);
687 static void xlstat_isreg(const char *path, struct stat *stab,
688 int *enoent_r /* 0 means ENOENT is fatal */,
690 int r= lstat(path, stab);
692 if (errno==ENOENT && enoent_r) { *enoent_r=1; return; }
693 sysdie("could not lstat %s %s", what, path);
695 if (enoent_r) *enoent_r= 0;
696 check_isreg(stab, path, what);
699 static int samefile(const struct stat *a, const struct stat *b) {
700 assert(S_ISREG(a->st_mode));
701 assert(S_ISREG(b->st_mode));
702 return (a->st_ino == b->st_ino &&
703 a->st_dev == b->st_dev);
706 static char *sanitise(const char *input) {
707 static char sanibuf[100]; /* returns pointer to this buffer! */
709 const char *p= input;
713 if (q > sanibuf+sizeof(sanibuf)-8) { strcpy(q,"'.."); break; }
715 if (!c) { *q++= '\''; *q=0; break; }
716 if (c>=' ' && c<=126 && c!='\\') { *q++= c; continue; }
717 sprintf(q,"\\x%02x",c);
723 static int isewouldblock(int errnoval) {
724 return errnoval==EWOULDBLOCK || errnoval==EAGAIN;
728 /*========== command and control connections ==========*/
730 static int control_master;
732 typedef struct ControlConn ControlConn;
734 void (*destroy)(ControlConn*);
740 struct sockaddr_un un;
745 static const oop_rd_style control_rd_style= {
746 OOP_RD_DELIM_STRIP, '\n',
748 OOP_RD_SHORTREC_FORBID
751 static void control_destroy(ControlConn *cc) {
755 static void control_checkouterr(ControlConn *cc /* may destroy*/) {
756 if (ferror(cc->out) | fflush(cc->out)) {
757 info("CTRL%d write error %s", cc->fd, strerror(errno));
762 static void control_prompt(ControlConn *cc /* may destroy*/) {
763 fprintf(cc->out, "%s| ", sitename);
764 control_checkouterr(cc);
767 typedef struct ControlCommand ControlCommand;
768 struct ControlCommand {
770 void (*f)(ControlConn *cc, const ControlCommand *ccmd,
771 const char *arg, size_t argsz);
776 static const ControlCommand control_commands[];
779 static void ccmd_##wh(ControlConn *cc, const ControlCommand *c, \
780 const char *arg, size_t argsz)
783 fputs("commands:\n", cc->out);
784 const ControlCommand *ccmd;
785 for (ccmd=control_commands; ccmd->cmd; ccmd++)
786 fprintf(cc->out, " %s\n", ccmd->cmd);
789 CCMD(period) { period(); }
790 CCMD(setintarg) { *(int*)c->xdata= atoi(arg); }
791 CCMD(setint) { *(int*)c->xdata= c->xval; }
793 static const ControlCommand control_commands[]= {
795 { "p", ccmd_period },
796 { "pretend flush", ccmd_setintarg, &simulate_flush },
797 { "poke sm", ccmd_setint, &sm_period_counter, 1 },
798 { "poke conn", ccmd_setint, &until_connect, 0 },
799 { "poke blscan", ccmd_setint, &until_backlog_nextscan, 0 },
800 { "wedge blscan", ccmd_setint, &until_backlog_nextscan, -1 },
804 static void *control_rd_ok(oop_source *lp, oop_read *oread, oop_rd_event ev,
805 const char *errmsg, int errnoval,
806 const char *data, size_t recsz, void *cc_v) {
807 ControlConn *cc= cc_v;
810 info("CTRL%d closed", cc->fd);
815 if (recsz == 0) goto prompt;
817 const ControlCommand *ccmd;
818 for (ccmd=control_commands; ccmd->cmd; ccmd++) {
819 int l= strlen(ccmd->cmd);
820 if (recsz < l) continue;
821 if (recsz > l && data[l] != ' ') continue;
822 if (memcmp(data, ccmd->cmd, l)) continue;
824 int argl= (int)recsz - (l+1);
825 ccmd->f(cc, ccmd, argl>=0 ? data+l+1 : 0, argl);
829 fputs("unknown command; h for help\n", cc->out);
836 static void *control_rd_err(oop_source *lp, oop_read *oread, oop_rd_event ev,
837 const char *errmsg, int errnoval,
838 const char *data, size_t recsz, void *cc_v) {
839 ControlConn *cc= cc_v;
841 info("CTRL%d read error %s", cc->fd, errmsg);
846 static int control_conn_startup(ControlConn *cc /* may destroy*/,
848 cc->rd= oop_rd_new_fd(loop, cc->fd, 0,0);
849 if (!cc->rd) { warn("oop_rd_new_fd control failed"); return -1; }
851 int er= oop_rd_read(cc->rd, &control_rd_style, MAX_CONTROL_COMMAND,
854 if (er) { errno= er; syswarn("oop_rd_read control failed"); return -1; }
856 info("CTRL%d %s ready", cc->fd, how);
861 static void control_stdio_destroy(ControlConn *cc) {
863 oop_rd_cancel(cc->rd);
864 errno= oop_rd_delete_tidy(cc->rd);
865 if (errno) syswarn("oop_rd_delete tidy failed (no-nonblock stdin?)");
870 static void control_stdio(void) {
871 ControlConn *cc= xmalloc(sizeof(*cc));
872 memset(cc,0,sizeof(*cc));
873 cc->destroy= control_stdio_destroy;
877 int r= control_conn_startup(cc,"stdio");
878 if (r) cc->destroy(cc);
881 static void control_accepted_destroy(ControlConn *cc) {
883 oop_rd_cancel(cc->rd);
884 oop_rd_delete_kill(cc->rd);
886 if (cc->out) { fclose(cc->out); cc->fd=0; }
887 close_perhaps(&cc->fd);
891 static void *control_master_readable(oop_source *lp, int master,
892 oop_event ev, void *u) {
893 ControlConn *cc= xmalloc(sizeof(*cc));
894 memset(cc,0,sizeof(*cc));
895 cc->destroy= control_accepted_destroy;
897 cc->salen= sizeof(cc->sa);
898 cc->fd= accept(master, &cc->sa.sa, &cc->salen);
899 if (cc->fd<0) { syswarn("error accepting control connection"); goto x; }
901 cc->out= fdopen(cc->fd, "w");
902 if (!cc->out) { syswarn("error fdopening accepted control conn"); goto x; }
904 int r= control_conn_startup(cc, "accepted");
914 #define NOCONTROL(...) do{ \
915 syswarn("no control socket, because failed to " __VA_ARGS__); \
919 static void control_init(void) {
924 struct sockaddr_un un;
927 memset(&sa,0,sizeof(sa));
928 int maxlen= sizeof(sa.un.sun_path);
930 int reallen= readlink(path_control, sa.un.sun_path, maxlen);
933 NOCONTROL("readlink control socket symlink path %s", path_control);
935 if (reallen >= maxlen) {
936 debug("control socket symlink path too long (r=%d)",reallen);
937 xunlink(path_control, "old (overlong) control socket symlink");
943 int r= lstat(realsockdir,&stab);
945 if (errno != ENOENT) NOCONTROL("lstat real socket dir %s", realsockdir);
947 r= mkdir(realsockdir, 0700);
948 if (r) NOCONTROL("mkdir real socket dir %s", realsockdir);
951 uid_t self= geteuid();
952 if (!S_ISDIR(stab.st_mode) ||
953 stab.st_uid != self ||
954 stab.st_mode & 0077) {
955 warn("no control socket, because real socket directory"
956 " is somehow wrong (ISDIR=%d, uid=%lu (exp.%lu), mode %lo)",
957 !!S_ISDIR(stab.st_mode),
958 (unsigned long)stab.st_uid, (unsigned long)self,
959 (unsigned long)stab.st_mode & 0777UL);
964 real= xasprintf("%s/s%lx.%lx", realsockdir,
965 (unsigned long)xtime(), (unsigned long)self_pid);
966 int reallen= strlen(real);
968 if (reallen >= maxlen) {
969 warn("no control socket, because tmpnam gave overly-long path"
973 r= symlink(real, path_control);
974 if (r) NOCONTROL("make control socket path %s a symlink to real"
975 " socket path %s", path_control, real);
976 memcpy(sa.un.sun_path, real, reallen);
979 int r= unlink(sa.un.sun_path);
980 if (r && errno!=ENOENT)
981 NOCONTROL("remove old real socket %s", sa.un.sun_path);
983 control_master= socket(PF_UNIX, SOCK_STREAM, 0);
984 if (control_master<0) NOCONTROL("create new control socket");
986 sa.un.sun_family= AF_UNIX;
987 int sl= strlen(sa.un.sun_path) + offsetof(struct sockaddr_un, sun_path);
988 r= bind(control_master, &sa.sa, sl);
989 if (r) NOCONTROL("bind to real socket path %s", sa.un.sun_path);
991 r= listen(control_master, 5);
992 if (r) NOCONTROL("listen");
994 xsetnonblock(control_master, 1);
996 loop->on_fd(loop, control_master, OOP_READ, control_master_readable, 0);
997 info("control socket ok, real path %s", sa.un.sun_path);
1003 xclose_perhaps(&control_master, "control master",0);
1007 /*========== management of connections ==========*/
1009 static void conn_closefd(Conn *conn, const char *msgprefix) {
1010 int r= close_perhaps(&conn->fd);
1011 if (r) info("C%d %serror closing socket: %s",
1012 conn->fd, msgprefix, strerror(errno));
1015 static void conn_dispose(Conn *conn) {
1018 oop_rd_cancel(conn->rd);
1019 oop_rd_delete_kill(conn->rd);
1023 loop->cancel_fd(loop, conn->fd, OOP_WRITE);
1024 loop->cancel_fd(loop, conn->fd, OOP_EXCEPTION);
1026 conn_closefd(conn,"");
1028 until_connect= reconnect_delay_periods;
1031 static void *conn_exception(oop_source *lp, int fd,
1032 oop_event ev, void *conn_v) {
1035 assert(fd == conn->fd);
1036 assert(ev == OOP_EXCEPTION);
1037 int r= read(conn->fd, &ch, 1);
1038 if (r<0) connfail(conn,"read failed: %s",strerror(errno));
1039 else connfail(conn,"exceptional condition on socket (peer sent urgent"
1040 " data? read(,&ch,1)=%d,ch='\\x%02x')",r,ch);
1041 return OOP_CONTINUE;
1044 static void vconnfail(Conn *conn, const char *fmt, va_list al) {
1045 int requeue[art_MaxState];
1046 memset(requeue,0,sizeof(requeue));
1049 while ((art= LIST_REMHEAD(conn->priority))) LIST_ADDTAIL(queue, art);
1050 while ((art= LIST_REMHEAD(conn->waiting))) LIST_ADDTAIL(queue, art);
1051 while ((art= LIST_REMHEAD(conn->sent))) {
1052 requeue[art->state]++;
1053 if (art->state==art_Unsolicited) art->state= art_Unchecked;
1054 LIST_ADDTAIL(queue,art);
1059 for (i=0, d=conn->xmitd; i<conn->xmitu; i++, d++)
1062 char *m= xvasprintf(fmt,al);
1063 warn("C%d connection failed (requeueing " RCI_TRIPLE_FMT_BASE "): %s",
1064 conn->fd, RCI_TRIPLE_VALS_BASE(requeue, /*nothing*/), m);
1067 LIST_REMOVE(conns,conn);
1069 check_assign_articles();
1072 static void connfail(Conn *conn, const char *fmt, ...) {
1075 vconnfail(conn,fmt,al);
1079 static void check_idle_conns(void) {
1081 for (conn=LIST_HEAD(conns); conn; conn=LIST_NEXT(conn))
1082 conn->since_activity++;
1084 for (conn=LIST_HEAD(conns); conn; conn=LIST_NEXT(conn)) {
1085 if (conn->since_activity <= need_activity_periods) continue;
1087 /* We need to shut this down */
1089 connfail(conn,"timed out waiting for response to QUIT");
1090 else if (conn->sent.count)
1091 connfail(conn,"timed out waiting for responses");
1092 else if (conn->waiting.count || conn->priority.count)
1093 connfail(conn,"BUG IN INNDUCT conn has queue but nothing sent");
1094 else if (conn->xmitu)
1095 connfail(conn,"peer has been sending responses"
1096 " before receiving our commands!");
1098 static const char quitcmd[]= "QUIT\r\n";
1099 int todo= sizeof(quitcmd)-1;
1100 const char *p= quitcmd;
1102 int r= write(conn->fd, p, todo);
1104 if (isewouldblock(errno))
1105 connfail(conn, "blocked writing QUIT to idle connection");
1107 connfail(conn, "failed to write QUIT to idle connection: %s",
1115 conn->since_activity= 0;
1116 debug("C%d is idle, quitting", conn->fd);
1125 /*---------- making new connections ----------*/
1127 static pid_t connecting_child;
1128 static int connecting_fdpass_sock;
1130 static void connect_attempt_discard(void) {
1131 if (connecting_child) {
1132 int status= xwaitpid(&connecting_child, "connect");
1133 if (!(WIFEXITED(status) ||
1134 (WIFSIGNALED(status) && WTERMSIG(status) == SIGKILL)))
1135 report_child_status("connect", status);
1137 if (connecting_fdpass_sock) {
1138 cancel_fd_read_except(connecting_fdpass_sock);
1139 xclose_perhaps(&connecting_fdpass_sock, "connecting fdpass socket",0);
1143 #define PREP_DECL_MSG_CMSG(msg) \
1145 struct iovec msgiov; \
1146 msgiov.iov_base= &msgbyte; \
1147 msgiov.iov_len= 1; \
1148 struct msghdr msg; \
1149 memset(&msg,0,sizeof(msg)); \
1150 char msg##cbuf[CMSG_SPACE(sizeof(int))]; \
1151 msg.msg_iov= &msgiov; \
1152 msg.msg_iovlen= 1; \
1153 msg.msg_control= msg##cbuf; \
1154 msg.msg_controllen= sizeof(msg##cbuf);
1156 static void *connchild_event(oop_source *lp, int fd, oop_event e, void *u) {
1159 assert(fd == connecting_fdpass_sock);
1161 PREP_DECL_MSG_CMSG(msg);
1163 ssize_t rs= recvmsg(fd, &msg, 0);
1165 if (isewouldblock(errno)) return OOP_CONTINUE;
1166 syswarn("failed to read socket from connecting child");
1170 conn= xmalloc(sizeof(*conn));
1171 memset(conn,0,sizeof(*conn));
1172 LIST_INIT(conn->waiting);
1173 LIST_INIT(conn->priority);
1174 LIST_INIT(conn->sent);
1176 struct cmsghdr *h= 0;
1177 if (rs >= 0) h= CMSG_FIRSTHDR(&msg);
1179 int status= xwaitpid(&connecting_child, "connect child (broken)");
1181 if (WIFEXITED(status)) {
1182 if (WEXITSTATUS(status) != 0 &&
1183 WEXITSTATUS(status) != CONNCHILD_ESTATUS_STREAM &&
1184 WEXITSTATUS(status) != CONNCHILD_ESTATUS_NOSTREAM)
1185 /* child already reported the problem */;
1187 if (e == OOP_EXCEPTION)
1188 warn("connect: connection child exited code %d but"
1189 " unexpected exception on fdpass socket",
1190 WEXITSTATUS(status));
1192 warn("connect: connection child exited code %d but"
1194 WEXITSTATUS(status), (int)rs);
1196 } else if (WIFSIGNALED(status) && WTERMSIG(status) == SIGALRM) {
1197 warn("connect: connection attempt timed out");
1199 report_child_status("connect", status);
1204 #define CHK(field, val) \
1205 if (h->cmsg_##field != val) { \
1206 die("connect: child sent cmsg with cmsg_" #field "=%d, expected %d", \
1207 h->cmsg_##field, val); \
1210 CHK(level, SOL_SOCKET);
1211 CHK(type, SCM_RIGHTS);
1212 CHK(len, CMSG_LEN(sizeof(conn->fd)));
1215 if (CMSG_NXTHDR(&msg,h)) die("connect: child sent many cmsgs");
1217 memcpy(&conn->fd, CMSG_DATA(h), sizeof(conn->fd));
1220 pid_t got= waitpid(connecting_child, &status, 0);
1221 if (got==-1) sysdie("connect: real wait for child");
1222 assert(got == connecting_child);
1223 connecting_child= 0;
1225 if (!WIFEXITED(status)) { report_child_status("connect",status); goto x; }
1226 int es= WEXITSTATUS(status);
1228 case CONNCHILD_ESTATUS_STREAM: conn->stream= 1; break;
1229 case CONNCHILD_ESTATUS_NOSTREAM: conn->stream= 0; break;
1231 fatal("connect: child gave unexpected exit status %d", es);
1235 conn->max_queue= conn->stream ? max_queue_per_conn : 1;
1237 loop->on_fd(loop, conn->fd, OOP_EXCEPTION, conn_exception, conn);
1238 conn->rd= oop_rd_new_fd(loop,conn->fd, 0, 0); /* sets nonblocking, too */
1239 if (!conn->fd) die("oop_rd_new_fd conn failed (fd=%d)",conn->fd);
1240 int r= oop_rd_read(conn->rd, &peer_rd_style, NNTP_STRLEN,
1242 &peer_rd_err, conn);
1243 if (r) sysdie("oop_rd_read for peer (fd=%d)",conn->fd);
1245 notice("C%d connected %s", conn->fd, conn->stream ? "streaming" : "plain");
1246 LIST_ADDHEAD(conns, conn);
1248 connect_attempt_discard();
1249 check_assign_articles();
1250 return OOP_CONTINUE;
1254 connect_attempt_discard();
1255 return OOP_CONTINUE;
1258 static int allow_connect_start(void) {
1259 return conns.count < max_connections
1260 && !connecting_child
1264 static void connect_start(void) {
1265 assert(!connecting_child);
1266 assert(!connecting_fdpass_sock);
1268 info("starting connection attempt");
1271 int r= socketpair(AF_UNIX, SOCK_STREAM, 0, socks);
1272 if (r) { syswarn("connect: cannot create socketpair for child"); return; }
1274 connecting_child= xfork("connection");
1276 if (!connecting_child) {
1277 FILE *cn_from, *cn_to;
1278 char buf[NNTP_STRLEN+100];
1279 int exitstatus= CONNCHILD_ESTATUS_NOSTREAM;
1281 xclose(socks[0], "(in child) parent's connection fdpass socket",0);
1283 alarm(connection_setup_timeout);
1284 if (NNTPconnect((char*)remote_host, port, &cn_from, &cn_to, buf) < 0) {
1288 unsigned char c= buf[l-1];
1289 if (!isspace(c)) break;
1290 if (c=='\n' || c=='\r') stripped=1;
1294 sysfatal("connect: connection attempt failed");
1297 fatal("connect: %s: %s", stripped ? "rejected" : "failed",
1301 if (NNTPsendpassword((char*)remote_host, cn_from, cn_to) < 0)
1302 sysfatal("connect: authentication failed");
1304 if (fputs("MODE STREAM\r\n", cn_to)==EOF ||
1306 sysfatal("connect: could not send MODE STREAM");
1307 buf[sizeof(buf)-1]= 0;
1308 if (!fgets(buf, sizeof(buf)-1, cn_from)) {
1309 if (ferror(cn_from))
1310 sysfatal("connect: could not read response to MODE STREAM");
1312 fatal("connect: connection close in response to MODE STREAM");
1317 fatal("connect: response to MODE STREAM is too long: %.100s...",
1319 l--; if (l>0 && buf[l-1]=='\r') l--;
1322 int rcode= strtoul(buf,&ep,10);
1324 fatal("connect: bad response to MODE STREAM: %.50s", sanitise(buf));
1328 exitstatus= CONNCHILD_ESTATUS_STREAM;
1334 warn("connect: unexpected response to MODE STREAM: %.50s",
1340 int fd= fileno(cn_from);
1342 PREP_DECL_MSG_CMSG(msg);
1343 struct cmsghdr *cmsg= CMSG_FIRSTHDR(&msg);
1344 cmsg->cmsg_level= SOL_SOCKET;
1345 cmsg->cmsg_type= SCM_RIGHTS;
1346 cmsg->cmsg_len= CMSG_LEN(sizeof(fd));
1347 memcpy(CMSG_DATA(cmsg), &fd, sizeof(fd));
1349 msg.msg_controllen= cmsg->cmsg_len;
1350 r= sendmsg(socks[1], &msg, 0);
1351 if (r<0) sysdie("sendmsg failed for new connection");
1352 if (r!=1) die("sendmsg for new connection gave wrong result %d",r);
1357 xclose(socks[1], "connecting fdpass child's socket",0);
1358 connecting_fdpass_sock= socks[0];
1359 xsetnonblock(connecting_fdpass_sock, 1);
1360 on_fd_read_except(connecting_fdpass_sock, connchild_event);
1363 /*---------- assigning articles to conns, and transmitting ----------*/
1365 static void check_assign_articles(void) {
1371 int spare=0, inqueue=0;
1373 /* Find a connection to offer this article. We prefer a busy
1374 * connection to an idle one, provided it's not full. We take the
1375 * first (oldest) and since that's stable, it will mean we fill up
1376 * connections in order. That way if we have too many
1377 * connections, the spare ones will go away eventually.
1379 for (walk=LIST_HEAD(conns); walk; walk=LIST_NEXT(walk)) {
1380 if (walk->quitting) continue;
1381 inqueue= walk->sent.count + walk->priority.count
1382 + walk->waiting.count;
1383 spare= walk->max_queue - inqueue;
1384 assert(inqueue <= max_queue_per_conn);
1386 if (inqueue==0) /*idle*/ { if (!use) use= walk; }
1387 else if (spare>0) /*working*/ { use= walk; break; }
1390 if (!inqueue) use->since_activity= 0; /* reset idle counter */
1392 Article *art= LIST_REMHEAD(queue);
1394 LIST_ADDTAIL(use->waiting, art);
1397 conn_maybe_write(use);
1398 } else if (allow_connect_start()) {
1399 until_connect= reconnect_delay_periods;
1408 static void *conn_writeable(oop_source *l, int fd, oop_event ev, void *u) {
1409 conn_maybe_write(u);
1410 return OOP_CONTINUE;
1413 static void conn_maybe_write(Conn *conn) {
1415 conn_make_some_xmits(conn);
1417 loop->cancel_fd(loop, conn->fd, OOP_WRITE);
1421 void *rp= conn_write_some_xmits(conn);
1422 if (rp==OOP_CONTINUE) {
1423 loop->on_fd(loop, conn->fd, OOP_WRITE, conn_writeable, conn);
1425 } else if (rp==OOP_HALT) {
1428 /* transmitted everything */
1435 /*========== article transmission ==========*/
1437 static XmitDetails *xmit_core(Conn *conn, const char *data, int len,
1438 XmitKind kind) { /* caller must then fill in details */
1439 struct iovec *v= &conn->xmit[conn->xmitu];
1440 XmitDetails *d= &conn->xmitd[conn->xmitu++];
1441 v->iov_base= (char*)data;
1447 static void xmit_noalloc(Conn *conn, const char *data, int len) {
1448 xmit_core(conn,data,len, xk_Const);
1450 #define XMIT_LITERAL(lit) (xmit_noalloc(conn, (lit), sizeof(lit)-1))
1452 static void xmit_artbody(Conn *conn, ARTHANDLE *ah /* consumed */) {
1453 XmitDetails *d= xmit_core(conn, ah->data, ah->len, xk_Artdata);
1457 static void xmit_free(XmitDetails *d) {
1459 case xk_Malloc: free(d->info.malloc_tofree); break;
1460 case xk_Artdata: SMfreearticle(d->info.sm_art); break;
1461 case xk_Const: break;
1466 static void *conn_write_some_xmits(Conn *conn) {
1468 * 0: nothing more to write, no need to call us again
1469 * OOP_CONTINUE: more to write but fd not writeable
1470 * OOP_HALT: disaster, have destroyed conn
1473 int count= conn->xmitu;
1474 if (!count) return 0;
1476 if (count > IOV_MAX) count= IOV_MAX;
1477 ssize_t rs= writev(conn->fd, conn->xmit, count);
1479 if (isewouldblock(errno)) return OOP_CONTINUE;
1480 connfail(conn, "write failed: %s", strerror(errno));
1486 for (done=0; rs && done<conn->xmitu; done++) {
1487 struct iovec *vp= &conn->xmit[done];
1488 XmitDetails *dp= &conn->xmitd[done];
1489 if (rs > vp->iov_len) {
1493 vp->iov_base= (char*)vp->iov_base + rs;
1497 int newu= conn->xmitu - done;
1498 memmove(conn->xmit, conn->xmit + done, newu * sizeof(*conn->xmit));
1499 memmove(conn->xmitd, conn->xmitd + done, newu * sizeof(*conn->xmitd));
1504 static void conn_make_some_xmits(Conn *conn) {
1506 if (conn->xmitu+5 > CONNIOVS)
1509 Article *art= LIST_REMHEAD(conn->priority);
1510 if (!art) art= LIST_REMHEAD(conn->waiting);
1513 if (art->state >= art_Wanted || (conn->stream && nocheck)) {
1514 /* actually send it */
1516 ARTHANDLE *artdata= SMretrieve(art->token, RETR_ALL);
1519 art->state == art_Unchecked ? art_Unsolicited :
1520 art->state == art_Wanted ? art_Wanted :
1523 if (!artdata) art->missing= 1;
1524 art->ipf->counts[art->state][ artdata ? RC_sent : RC_missing ]++;
1528 XMIT_LITERAL("TAKETHIS ");
1529 xmit_noalloc(conn, art->messageid, art->midlen);
1530 XMIT_LITERAL("\r\n");
1531 xmit_artbody(conn, artdata);
1533 article_done(conn, art, -1);
1537 /* we got 235 from IHAVE */
1539 xmit_artbody(conn, artdata);
1541 XMIT_LITERAL(".\r\n");
1545 LIST_ADDTAIL(conn->sent, art);
1551 XMIT_LITERAL("CHECK ");
1553 XMIT_LITERAL("IHAVE ");
1554 xmit_noalloc(conn, art->messageid, art->midlen);
1555 XMIT_LITERAL("\r\n");
1557 assert(art->state == art_Unchecked);
1558 art->ipf->counts[art->state][RC_sent]++;
1559 LIST_ADDTAIL(conn->sent, art);
1565 /*========== handling responses from peer ==========*/
1567 static const oop_rd_style peer_rd_style= {
1568 OOP_RD_DELIM_STRIP, '\n',
1570 OOP_RD_SHORTREC_FORBID
1573 static void *peer_rd_err(oop_source *lp, oop_read *oread, oop_rd_event ev,
1574 const char *errmsg, int errnoval,
1575 const char *data, size_t recsz, void *conn_v) {
1577 connfail(conn, "error receiving from peer: %s", errmsg);
1578 return OOP_CONTINUE;
1581 static Article *article_reply_check(Conn *conn, const char *response,
1582 int code_indicates_streaming,
1584 /* 1:yes, -1:no, 0:dontcare */,
1585 const char *sanitised_response) {
1586 Article *art= LIST_HEAD(conn->sent);
1590 "peer gave unexpected response when no commands outstanding: %s",
1591 sanitised_response);
1595 if (code_indicates_streaming) {
1596 assert(!memchr(response, 0, 4)); /* ensured by peer_rd_ok */
1597 if (!conn->stream) {
1598 connfail(conn, "peer gave streaming response code "
1599 " to IHAVE or subsequent body: %s", sanitised_response);
1602 const char *got_mid= response+4;
1603 int got_midlen= strcspn(got_mid, " \n\r");
1604 if (got_midlen<3 || got_mid[0]!='<' || got_mid[got_midlen-1]!='>') {
1605 connfail(conn, "peer gave streaming response with syntactically invalid"
1606 " messageid: %s", sanitised_response);
1609 if (got_midlen != art->midlen ||
1610 memcmp(got_mid, art->messageid, got_midlen)) {
1611 connfail(conn, "peer gave streaming response code to wrong article -"
1612 " probable synchronisation problem; we offered: %s;"
1614 art->messageid, sanitised_response);
1619 connfail(conn, "peer gave non-streaming response code to"
1620 " CHECK/TAKETHIS: %s", sanitised_response);
1625 if (must_have_sent>0 && art->state < art_Wanted) {
1626 connfail(conn, "peer says article accepted but"
1627 " we had not sent the body: %s", sanitised_response);
1630 if (must_have_sent<0 && art->state >= art_Wanted) {
1631 connfail(conn, "peer says please sent the article but we just did: %s",
1632 sanitised_response);
1636 Article *art_again= LIST_REMHEAD(conn->sent);
1637 assert(art_again == art);
1641 static void update_nocheck(int accepted) {
1642 accept_proportion *= nocheck_decay;
1643 accept_proportion += accepted * (1.0 - nocheck_decay);
1644 int new_nocheck= accept_proportion >= nocheck_thresh;
1645 if (new_nocheck && !nocheck_reported) {
1646 notice("entering nocheck mode for the first time");
1647 nocheck_reported= 1;
1648 } else if (new_nocheck != nocheck) {
1649 debug("nocheck mode %s", new_nocheck ? "start" : "stop");
1651 nocheck= new_nocheck;
1654 static void article_done(Conn *conn, Article *art, int whichcount) {
1655 if (!art->missing) art->ipf->counts[art->state][whichcount]++;
1657 if (whichcount == RC_accepted) update_nocheck(1);
1658 else if (whichcount == RC_unwanted) update_nocheck(0);
1660 InputFile *ipf= art->ipf;
1662 while (art->blanklen) {
1663 static const char spaces[]=
1673 int w= art->blanklen; if (w >= sizeof(spaces)) w= sizeof(spaces)-1;
1674 int r= pwrite(ipf->fd, spaces, w, art->offset);
1676 if (errno==EINTR) continue;
1677 sysdie("failed to blank entry for %s (length %d at offset %lu) in %s",
1678 art->messageid, art->blanklen,
1679 (unsigned long)art->offset, ipf->path);
1681 assert(r>=0 && r<=w);
1687 assert(ipf->inprogress >= 0);
1690 if (!ipf->inprogress && ipf != main_input_file)
1691 queue_check_input_done();
1694 static void *peer_rd_ok(oop_source *lp, oop_read *oread, oop_rd_event ev,
1695 const char *errmsg, int errnoval,
1696 const char *data, size_t recsz, void *conn_v) {
1699 if (ev == OOP_RD_EOF) {
1700 connfail(conn, "unexpected EOF from peer");
1701 return OOP_CONTINUE;
1703 assert(ev == OOP_RD_OK);
1705 char *sani= sanitise(data);
1708 unsigned long code= strtoul(data, &ep, 10);
1709 if (ep != data+3 || *ep != ' ' || data[0]=='0') {
1710 connfail(conn, "badly formatted response from peer: %s", sani);
1711 return OOP_CONTINUE;
1714 if (conn->quitting) {
1715 if (code!=205 && code!=503) {
1716 connfail(conn, "peer gave unexpected response to QUIT: %s", sani);
1718 notice("C%d idle connection closed", conn->fd);
1719 assert(!conn->waiting.count);
1720 assert(!conn->priority.count);
1721 assert(!conn->sent.count);
1722 assert(!conn->xmitu);
1723 LIST_REMOVE(conns,conn);
1726 return OOP_CONTINUE;
1729 conn->since_activity= 0;
1732 #define GET_ARTICLE(musthavesent) \
1733 art= article_reply_check(conn, data, code_streaming, musthavesent, sani); \
1734 if (art) ; else return OOP_CONTINUE /* reply_check has failed the conn */
1736 #define ARTICLE_DEALTWITH(streaming,musthavesent,how) \
1737 code_streaming= (streaming); \
1738 GET_ARTICLE(musthavesent); \
1739 article_done(conn, art, RC_##how); break;
1741 #define PEERBADMSG(m) connfail(conn, m ": %s", sani); return OOP_CONTINUE
1743 int code_streaming= 0;
1747 case 400: PEERBADMSG("peer stopped accepting articles");
1748 case 503: PEERBADMSG("peer timed us out");
1749 default: PEERBADMSG("peer sent unexpected message");
1751 case 435: ARTICLE_DEALTWITH(0,0,unwanted); /* IHAVE says they have it */
1752 case 438: ARTICLE_DEALTWITH(1,0,unwanted); /* CHECK/TAKETHIS: they have it */
1754 case 235: ARTICLE_DEALTWITH(0,1,accepted); /* IHAVE says thanks */
1755 case 239: ARTICLE_DEALTWITH(1,1,accepted); /* TAKETHIS says thanks */
1757 case 437: ARTICLE_DEALTWITH(0,0,rejected); /* IHAVE says rejected */
1758 case 439: ARTICLE_DEALTWITH(1,0,rejected); /* TAKETHIS says rejected */
1760 case 238: /* CHECK says send it */
1762 case 335: /* IHAVE says send it */
1764 assert(art->state == art_Unchecked);
1765 art->ipf->counts[art->state][RC_accepted]++;
1766 art->state= art_Wanted;
1767 LIST_ADDTAIL(conn->priority, art);
1770 case 431: /* CHECK or TAKETHIS says try later */
1772 case 436: /* IHAVE says try later */
1775 if (fprintf(defer, "%s %s\n", TokenToText(art->token), art->messageid) <0
1777 sysfatal("write to defer file %s",path_defer);
1778 article_done(conn, art, RC_deferred);
1783 conn_maybe_write(conn);
1784 check_assign_articles();
1785 return OOP_CONTINUE;
1789 /*========== monitoring of input files ==========*/
1791 static void feedfile_eof(InputFile *ipf) {
1792 assert(ipf != main_input_file); /* promised by tailing_try_read */
1793 inputfile_reading_stop(ipf);
1795 if (ipf == flushing_input_file) {
1796 assert(sms==sm_SEPARATED || sms==sm_DROPPING);
1797 if (main_input_file) inputfile_reading_start(main_input_file);
1798 statemc_check_flushing_done();
1799 } else if (ipf == backlog_input_file) {
1800 statemc_check_backlog_done();
1802 abort(); /* supposed to wait rather than get EOF on main input file */
1806 static InputFile *open_input_file(const char *path) {
1807 int fd= open(path, O_RDWR);
1809 if (errno==ENOENT) return 0;
1810 sysfatal("unable to open input file %s", path);
1814 InputFile *ipf= xmalloc(sizeof(*ipf) + strlen(path) + 1);
1815 memset(ipf,0,sizeof(*ipf));
1818 strcpy(ipf->path, path);
1823 static void close_input_file(InputFile *ipf) { /* does not free */
1824 assert(!ipf->readable_callback); /* must have had ->on_cancel */
1825 assert(!ipf->filemon); /* must have had inputfile_reading_stop */
1826 assert(!ipf->rd); /* must have had inputfile_reading_stop */
1827 assert(!ipf->inprogress); /* no dangling pointers pointing here */
1828 xclose_perhaps(&ipf->fd, "input file ", ipf->path);
1832 /*---------- dealing with articles read in the input file ----------*/
1834 static void *feedfile_got_bad_data(InputFile *ipf, off_t offset,
1835 const char *data, const char *how) {
1836 warn("corrupted file: %s, offset %lu: %s: in %s",
1837 ipf->path, (unsigned long)offset, how, sanitise(data));
1838 ipf->readcount_err++;
1839 if (ipf->readcount_err > max_bad_data_initial +
1840 (ipf->readcount_ok+ipf->readcount_blank) / max_bad_data_ratio)
1841 die("too much garbage in input file! (%d errs, %d ok, %d blank)",
1842 ipf->readcount_err, ipf->readcount_ok, ipf->readcount_blank);
1843 return OOP_CONTINUE;
1846 static void *feedfile_read_err(oop_source *lp, oop_read *rd,
1847 oop_rd_event ev, const char *errmsg,
1848 int errnoval, const char *data, size_t recsz,
1850 InputFile *ipf= ipf_v;
1851 assert(ev == OOP_RD_SYSTEM);
1853 sysdie("error reading input file: %s, offset %lu",
1854 ipf->path, (unsigned long)ipf->offset);
1857 static void *feedfile_got_article(oop_source *lp, oop_read *rd,
1858 oop_rd_event ev, const char *errmsg,
1859 int errnoval, const char *data, size_t recsz,
1861 InputFile *ipf= ipf_v;
1863 char tokentextbuf[sizeof(TOKEN)*2+3];
1865 if (!data) { feedfile_eof(ipf); return OOP_CONTINUE; }
1867 off_t old_offset= ipf->offset;
1868 ipf->offset += recsz + 1;
1870 #define X_BAD_DATA(m) return feedfile_got_bad_data(ipf,old_offset,data,m);
1872 if (ev==OOP_RD_PARTREC)
1873 feedfile_got_bad_data(ipf,old_offset,data,"missing final newline");
1874 /* but process it anyway */
1876 if (ipf->skippinglong) {
1877 if (ev==OOP_RD_OK) ipf->skippinglong= 0; /* fine now */
1878 return OOP_CONTINUE;
1880 if (ev==OOP_RD_LONG) {
1881 ipf->skippinglong= 1;
1882 X_BAD_DATA("overly long line");
1885 if (memchr(data,'\0',recsz)) X_BAD_DATA("nul byte");
1886 if (!recsz) X_BAD_DATA("empty line");
1889 if (strspn(data," ") != recsz) X_BAD_DATA("line partially blanked");
1890 ipf->readcount_blank++;
1891 return OOP_CONTINUE;
1894 char *space= strchr(data,' ');
1895 int tokenlen= space-data;
1896 int midlen= (int)recsz-tokenlen-1;
1897 if (midlen <= 2) X_BAD_DATA("no room for messageid");
1898 if (space[1]!='<' || space[midlen]!='>') X_BAD_DATA("invalid messageid");
1900 if (tokenlen != sizeof(TOKEN)*2+2) X_BAD_DATA("token wrong length");
1901 memcpy(tokentextbuf, data, tokenlen);
1902 tokentextbuf[tokenlen]= 0;
1903 if (!IsToken(tokentextbuf)) X_BAD_DATA("token wrong syntax");
1905 ipf->readcount_ok++;
1907 art= xmalloc(sizeof(*art) - 1 + midlen + 1);
1908 art->state= art_Unchecked;
1909 art->midlen= midlen;
1910 art->ipf= ipf; ipf->inprogress++;
1911 art->token= TextToToken(tokentextbuf);
1912 art->offset= old_offset;
1913 art->blanklen= recsz;
1914 strcpy(art->messageid, space+1);
1915 LIST_ADDTAIL(queue, art);
1917 if (sms==sm_NORMAL && ipf==main_input_file &&
1918 ipf->offset >= target_max_feedfile_size)
1919 statemc_start_flush("feed file size");
1921 check_assign_articles();
1922 return OOP_CONTINUE;
1925 /*========== tailing input file ==========*/
1927 static void *tailing_rable_call_time(oop_source *loop, struct timeval tv,
1929 InputFile *ipf= user;
1930 return ipf->readable_callback(loop, &ipf->readable,
1931 ipf->readable_callback_user);
1934 static void tailing_on_cancel(struct oop_readable *rable) {
1935 InputFile *ipf= (void*)rable;
1937 if (ipf->filemon) filemon_stop(ipf);
1938 loop->cancel_time(loop, OOP_TIME_NOW, tailing_rable_call_time, ipf);
1939 ipf->readable_callback= 0;
1942 static void tailing_queue_readable(InputFile *ipf) {
1943 /* lifetime of ipf here is OK because destruction will cause
1944 * on_cancel which will cancel this callback */
1945 loop->on_time(loop, OOP_TIME_NOW, tailing_rable_call_time, ipf);
1948 static int tailing_on_readable(struct oop_readable *rable,
1949 oop_readable_call *cb, void *user) {
1950 InputFile *ipf= (void*)rable;
1952 tailing_on_cancel(rable);
1953 ipf->readable_callback= cb;
1954 ipf->readable_callback_user= user;
1957 tailing_queue_readable(ipf);
1961 static ssize_t tailing_try_read(struct oop_readable *rable, void *buffer,
1963 InputFile *ipf= (void*)rable;
1965 ssize_t r= read(ipf->fd, buffer, length);
1967 if (errno==EINTR) continue;
1971 if (ipf==main_input_file) {
1974 } else if (ipf==flushing_input_file) {
1976 assert(sms==sm_SEPARATED || sms==sm_DROPPING);
1977 } else if (ipf==backlog_input_file) {
1983 tailing_queue_readable(ipf);
1988 /*---------- filemon implemented with inotify ----------*/
1990 #if defined(HAVE_SYS_INOTIFY_H) && !defined(HAVE_FILEMON)
1991 #define HAVE_FILEMON
1993 #include <sys/inotify.h>
1995 static int filemon_inotify_fd;
1996 static int filemon_inotify_wdmax;
1997 static InputFile **filemon_inotify_wd2ipf;
1999 struct Filemon_Perfile {
2003 static void filemon_method_startfile(InputFile *ipf, Filemon_Perfile *pf) {
2004 int wd= inotify_add_watch(filemon_inotify_fd, ipf->path, IN_MODIFY);
2005 if (wd < 0) sysfatal("inotify_add_watch %s", ipf->path);
2007 if (wd >= filemon_inotify_wdmax) {
2009 filemon_inotify_wd2ipf= xrealloc(filemon_inotify_wd2ipf,
2010 sizeof(*filemon_inotify_wd2ipf) * newmax);
2011 memset(filemon_inotify_wd2ipf + filemon_inotify_wdmax, 0,
2012 sizeof(*filemon_inotify_wd2ipf) * (newmax - filemon_inotify_wdmax));
2013 filemon_inotify_wdmax= newmax;
2016 assert(!filemon_inotify_wd2ipf[wd]);
2017 filemon_inotify_wd2ipf[wd]= ipf;
2019 debug("filemon inotify startfile %p wd=%d wdmax=%d",
2020 ipf, wd, filemon_inotify_wdmax);
2025 static void filemon_method_stopfile(InputFile *ipf, Filemon_Perfile *pf) {
2027 debug("filemon inotify stopfile %p wd=%d", ipf, wd);
2028 int r= inotify_rm_watch(filemon_inotify_fd, wd);
2029 if (r) sysdie("inotify_rm_watch");
2030 filemon_inotify_wd2ipf[wd]= 0;
2033 static void *filemon_inotify_readable(oop_source *lp, int fd,
2034 oop_event e, void *u) {
2035 struct inotify_event iev;
2037 int r= read(filemon_inotify_fd, &iev, sizeof(iev));
2039 if (isewouldblock(errno)) break;
2040 sysdie("read from inotify master");
2041 } else if (r==sizeof(iev)) {
2042 assert(iev.wd >= 0 && iev.wd < filemon_inotify_wdmax);
2044 die("inotify read %d bytes wanted struct of %d", r, (int)sizeof(iev));
2046 InputFile *ipf= filemon_inotify_wd2ipf[iev.wd];
2047 debug("filemon inotify readable read %d wd=%p", iev.wd, ipf);
2048 filemon_callback(ipf);
2050 return OOP_CONTINUE;
2053 static int filemon_method_init(void) {
2054 filemon_inotify_fd= inotify_init();
2055 if (filemon_inotify_fd<0) {
2056 syswarn("filemon/inotify: inotify_init failed");
2059 xsetnonblock(filemon_inotify_fd, 1);
2060 loop->on_fd(loop, filemon_inotify_fd, OOP_READ, filemon_inotify_readable, 0);
2062 debug("filemon inotify init filemon_inotify_fd=%d", filemon_inotify_fd);
2066 #endif /* HAVE_INOTIFY && !HAVE_FILEMON */
2068 /*---------- filemon dummy implementation ----------*/
2070 #if !defined(HAVE_FILEMON)
2072 struct Filemon_Perfile { int dummy; };
2074 static int filemon_method_init(void) {
2075 warn("filemon/dummy: no filemon method compiled in");
2078 static void filemon_method_startfile(InputFile *ipf, Filemon_Perfile *pf) { }
2079 static void filemon_method_stopfile(InputFile *ipf, Filemon_Perfile *pf) { }
2081 #endif /* !HAVE_FILEMON */
2083 /*---------- filemon generic interface ----------*/
2085 static void filemon_start(InputFile *ipf) {
2086 assert(!ipf->filemon);
2088 ipf->filemon= xmalloc(sizeof(*ipf->filemon));
2089 memset(ipf->filemon, 0, sizeof(*ipf->filemon));
2090 filemon_method_startfile(ipf, ipf->filemon);
2093 static void filemon_stop(InputFile *ipf) {
2094 if (!ipf->filemon) return;
2095 filemon_method_stopfile(ipf, ipf->filemon);
2100 static void filemon_callback(InputFile *ipf) {
2101 if (ipf && ipf->readable_callback) /* so filepoll() can be naive */
2102 ipf->readable_callback(loop, &ipf->readable, ipf->readable_callback_user);
2105 /*---------- interface to start and stop an input file ----------*/
2107 static const oop_rd_style feedfile_rdstyle= {
2108 OOP_RD_DELIM_STRIP, '\n',
2110 OOP_RD_SHORTREC_LONG,
2113 static void inputfile_reading_start(InputFile *ipf) {
2115 ipf->readable.on_readable= tailing_on_readable;
2116 ipf->readable.on_cancel= tailing_on_cancel;
2117 ipf->readable.try_read= tailing_try_read;
2118 ipf->readable.delete_tidy= 0; /* we never call oop_rd_delete_{tidy,kill} */
2119 ipf->readable.delete_kill= 0;
2121 ipf->readable_callback= 0;
2122 ipf->readable_callback_user= 0;
2124 ipf->rd= oop_rd_new(loop, &ipf->readable, 0,0);
2127 int r= oop_rd_read(ipf->rd, &feedfile_rdstyle, MAX_LINE_FEEDFILE,
2128 feedfile_got_article,ipf, feedfile_read_err, ipf);
2129 if (r) sysdie("unable start reading feedfile %s",ipf->path);
2132 static void inputfile_reading_stop(InputFile *ipf) {
2134 oop_rd_cancel(ipf->rd);
2135 oop_rd_delete(ipf->rd);
2137 assert(!ipf->filemon); /* we shouldn't be monitoring it now */
2141 /*========== interaction with innd - state machine ==========*/
2143 /* See official state diagram at top of file. We implement
2154 |`---------------------------------------------------.
2156 |`---------------- - - - |
2157 D ENOENT | D EXISTS see OVERALL STATES diagram |
2158 | for full startup logic |
2161 | ============ try to |
2167 | | F IS SO BIG WE SHOULD FLUSH, OR TIMEOUT |
2168 ^ | hardlink F to D |
2171 | | our handle onto F is now onto D |
2174 | |<-------------------<---------------------<---------+
2176 | | spawn inndcomm flush |
2178 | ================== |
2179 | FLUSHING[-ABSENT] |
2181 | main D tail/none |
2182 | ================== |
2184 | | INNDCOMM FLUSH FAILS ^
2185 | |`----------------------->----------. |
2187 | | NO SUCH SITE V |
2188 ^ |`--------------->----. ==================== |
2189 | | \ FLUSHFAILED[-ABSENT] |
2191 | | FLUSH OK \ main D tail/none |
2192 | | open F \ ==================== |
2194 | | \ | TIME TO RETRY |
2195 | |`------->----. ,---<---'\ `----------------'
2196 | | D NONE | | D NONE `----.
2198 | ============= V V ============
2199 | SEPARATED-1 | | DROPPING-1
2200 | flsh->rd!=0 | | flsh->rd!=0
2201 | [Separated] | | [Dropping]
2202 | main F idle | | main none
2203 | old D tail | | old D tail
2204 | ============= | | ============
2206 ^ | EOF ON D | | defer | EOF ON D
2208 | =============== | | ===============
2209 | SEPARATED-2 | | DROPPING-2
2210 | flsh->rd==0 | V flsh->rd==0
2211 | [Finishing] | | [Dropping]
2212 | main F tail | `. main none
2213 | old D closed | `. old D closed
2214 | =============== V `. ===============
2216 | | ALL D PROCESSED `. | ALL D PROCESSED
2217 | V install defer as backlog `. | install defer
2218 ^ | close D `. | close D
2219 | | unlink D `. | unlink D
2222 `----------' ==============
2242 static void startup_set_input_file(InputFile *f) {
2243 assert(!main_input_file);
2245 inputfile_reading_start(f);
2248 static void statemc_lock(void) {
2250 struct stat stab, stabf;
2253 lockfd= open(path_lock, O_CREAT|O_RDWR, 0600);
2254 if (lockfd<0) sysfatal("open lockfile %s", path_lock);
2257 memset(&fl,0,sizeof(fl));
2259 fl.l_whence= SEEK_SET;
2260 int r= fcntl(lockfd, F_SETLK, &fl);
2262 if (errno==EACCES || isewouldblock(errno)) {
2263 if (quiet_multiple) exit(0);
2264 fatal("another duct holds the lockfile");
2266 sysfatal("fcntl F_SETLK lockfile %s", path_lock);
2269 xfstat_isreg(lockfd, &stabf, path_lock, "lockfile");
2271 xlstat_isreg(path_lock, &stab, &lock_noent, "lockfile");
2273 if (!lock_noent && samefile(&stab, &stabf))
2276 xclose(lockfd, "stale lockfile ", path_lock);
2279 FILE *lockfile= fdopen(lockfd, "w");
2280 if (!lockfile) sysdie("fdopen lockfile");
2282 int r= ftruncate(lockfd, 0);
2283 if (r) sysdie("truncate lockfile to write new info");
2285 if (fprintf(lockfile, "pid %ld\nsite %s\nfeedfile %s\nfqdn %s\n",
2286 (unsigned long)self_pid,
2287 sitename, feedfile, remote_host) == EOF ||
2289 sysfatal("write info to lockfile %s", path_lock);
2291 debug("startup: locked");
2294 static void statemc_init(void) {
2295 struct stat stabdefer;
2297 search_backlog_file();
2300 xlstat_isreg(path_defer, &stabdefer, &defer_noent, "defer file");
2302 debug("startup: ductdefer ENOENT");
2304 debug("startup: ductdefer nlink=%ld", (long)stabdefer.st_nlink);
2305 switch (stabdefer.st_nlink==1) {
2307 open_defer(); /* so that we will later close it and rename it */
2310 xunlink(path_defer, "stale defer file link"
2311 " (presumably hardlink to backlog file)");
2314 die("defer file %s has unexpected link count %d",
2315 path_defer, stabdefer.st_nlink);
2319 struct stat stab_f, stab_d;
2322 InputFile *file_d= open_input_file(path_flushing);
2323 if (file_d) xfstat_isreg(file_d->fd, &stab_d, path_flushing,"flushing file");
2325 xlstat_isreg(feedfile, &stab_f, &noent_f, "feedfile");
2327 if (!noent_f && file_d && samefile(&stab_f, &stab_d)) {
2328 debug("startup: F==D => Hardlinked");
2329 xunlink(feedfile, "feed file (during startup)"); /* => Moved */
2334 debug("startup: F ENOENT => Moved");
2335 if (file_d) startup_set_input_file(file_d);
2336 spawn_inndcomm_flush("feedfile missing at startup");
2337 /* => Flushing, sms:=FLUSHING */
2340 debug("startup: F!=D => Separated");
2341 startup_set_input_file(file_d);
2342 SMS(SEPARATED, 0, "found both old and current feed files");
2344 debug("startup: F exists, D ENOENT => Normal");
2345 InputFile *file_f= open_input_file(feedfile);
2346 if (!file_f) die("feed file vanished during startup");
2347 startup_set_input_file(file_f);
2348 SMS(NORMAL, spontaneous_flush_periods, "normal startup");
2353 static void statemc_start_flush(const char *why) { /* Normal => Flushing */
2354 assert(sms == sm_NORMAL);
2356 debug("starting flush (%s) (%lu >?= %lu) (%d)",
2358 (unsigned long)(main_input_file ? main_input_file->offset : 0),
2359 (unsigned long)target_max_feedfile_size,
2362 int r= link(feedfile, path_flushing);
2363 if (r) sysfatal("link feedfile %s to flushing file %s",
2364 feedfile, path_flushing);
2367 xunlink(feedfile, "old feedfile link");
2370 spawn_inndcomm_flush(why); /* => Flushing FLUSHING */
2373 static void statemc_period_poll(void) {
2374 if (!sm_period_counter) return;
2375 sm_period_counter--;
2376 assert(sm_period_counter>=0);
2378 if (sm_period_counter) return;
2381 statemc_start_flush("periodic"); /* Normal => Flushing; => FLUSHING */
2383 case sm_FLUSHFAILED:
2384 spawn_inndcomm_flush("retry"); /* Moved => Flushing; => FLUSHING */
2391 static int inputfile_is_done(InputFile *ipf) {
2393 if (ipf->inprogress) return 0; /* new article in the meantime */
2394 if (ipf->rd) return 0; /* not had EOF */
2398 static void notice_processed(InputFile *ipf, const char *what,
2400 #define RCI_NOTHING(x) /* nothing */
2401 #define RCI_TRIPLE_FMT(x) " " #x "=" RCI_TRIPLE_FMT_BASE
2402 #define RCI_TRIPLE_VALS(x) , RCI_TRIPLE_VALS_BASE(ipf->counts, [RC_##x])
2404 #define CNT(art,rc) (ipf->counts[art_##art][RC_##rc])
2406 info("processed %s%s read=%d (+bl=%d,+err=%d)"
2407 " offered=%d (ch=%d,nc=%d) accepted=%d (ch=%d,nc=%d)"
2408 RESULT_COUNTS(RCI_NOTHING, RCI_TRIPLE_FMT)
2411 ipf->readcount_ok, ipf->readcount_blank, ipf->readcount_err,
2412 CNT(Unchecked,sent) + CNT(Unsolicited,sent)
2413 , CNT(Unchecked,sent), CNT(Unsolicited,sent),
2414 CNT(Wanted,accepted) + CNT(Unsolicited,accepted)
2415 , CNT(Wanted,accepted), CNT(Unsolicited,accepted)
2416 RESULT_COUNTS(RCI_NOTHING, RCI_TRIPLE_VALS)
2422 static void statemc_check_backlog_done(void) {
2423 InputFile *ipf= backlog_input_file;
2424 if (!inputfile_is_done(ipf)) return;
2426 const char *slash= strrchr(ipf->path, '/');
2427 const char *leaf= slash ? slash+1 : ipf->path;
2428 const char *under= strchr(slash, '_');
2429 const char *rest= under ? under+1 : leaf;
2430 if (!strncmp(rest,"backlog",7)) rest += 7;
2431 notice_processed(ipf,"backlog ",rest);
2433 close_input_file(ipf);
2434 if (unlink(ipf->path)) {
2435 if (errno != ENOENT)
2436 sysdie("could not unlink processed backlog file %s", ipf->path);
2437 warn("backlog file %s vanished while we were reading it"
2438 " so we couldn't remove it (but it's done now, anyway)",
2442 backlog_input_file= 0;
2443 search_backlog_file();
2447 static void statemc_check_flushing_done(void) {
2448 InputFile *ipf= flushing_input_file;
2449 if (!inputfile_is_done(ipf)) return;
2451 assert(sms==sm_SEPARATED || sms==sm_DROPPING);
2453 notice_processed(ipf,"feedfile","");
2457 xunlink(path_flushing, "old flushing file");
2459 close_input_file(flushing_input_file);
2460 free(flushing_input_file);
2461 flushing_input_file= 0;
2463 if (sms==sm_SEPARATED) {
2464 notice("flush complete");
2465 SMS(NORMAL, spontaneous_flush_periods, "flush complete");
2466 } else if (sms==sm_DROPPING) {
2467 SMS(DROPPED, 0, "old flush complete");
2468 search_backlog_file();
2469 notice("feed dropped, but will continue until backlog is finished");
2473 static void *statemc_check_input_done(oop_source *lp, struct timeval now,
2475 assert(!inputfile_is_done(main_input_file));
2476 statemc_check_flushing_done();
2477 statemc_check_backlog_done();
2478 return OOP_CONTINUE;
2481 static void queue_check_input_done(void) {
2482 loop->on_time(loop, OOP_TIME_NOW, statemc_check_input_done, 0);
2485 static void statemc_setstate(StateMachineState newsms, int periods,
2486 const char *forlog, const char *why) {
2488 sm_period_counter= periods;
2490 const char *xtra= "";
2493 case sm_FLUSHFAILED:
2494 if (!main_input_file) xtra= "-ABSENT";
2498 xtra= flushing_input_file->rd ? "-1" : "-2";
2504 info("state %s%s[%d] %s",forlog,xtra,periods,why);
2506 info("state %s%s %s",forlog,xtra,why);
2510 /*---------- defer and backlog files ----------*/
2512 static void open_defer(void) {
2517 defer= fopen(path_defer, "a+");
2518 if (!defer) sysfatal("could not open defer file %s", path_defer);
2520 /* truncate away any half-written records */
2522 xfstat_isreg(fileno(defer), &stab, path_defer, "newly opened defer file");
2524 if (stab.st_size > LONG_MAX)
2525 die("defer file %s size is far too large", path_defer);
2530 long orgsize= stab.st_size;
2531 long truncto= stab.st_size;
2533 if (!truncto) break; /* was only (if anything) one half-truncated record */
2534 if (fseek(defer, truncto-1, SEEK_SET) < 0)
2535 sysdie("seek in defer file %s while truncating partial", path_defer);
2540 sysdie("failed read from defer file %s", path_defer);
2542 die("defer file %s shrank while we were checking it!", path_defer);
2548 if (stab.st_size != truncto) {
2549 warn("truncating half-record at end of defer file %s -"
2550 " shrinking by %ld bytes from %ld to %ld",
2551 path_defer, orgsize - truncto, orgsize, truncto);
2554 sysfatal("could not flush defer file %s", path_defer);
2555 if (ftruncate(fileno(defer), truncto))
2556 sysdie("could not truncate defer file %s", path_defer);
2559 info("continuing existing defer file %s (%ld bytes)",
2560 path_defer, orgsize);
2562 if (fseek(defer, truncto, SEEK_SET))
2563 sysdie("could not seek to new end of defer file %s", path_defer);
2566 static void close_defer(void) {
2571 xfstat_isreg(fileno(defer), &stab, path_defer, "defer file");
2573 if (fclose(defer)) sysfatal("could not close defer file %s", path_defer);
2576 time_t now= xtime();
2578 char *backlog= xasprintf("%s_backlog_%lu.%lu", feedfile,
2580 (unsigned long)stab.st_ino);
2581 if (link(path_defer, backlog))
2582 sysfatal("could not install defer file %s as backlog file %s",
2583 path_defer, backlog);
2584 if (unlink(path_defer))
2585 sysdie("could not unlink old defer link %s to backlog file %s",
2586 path_defer, backlog);
2590 if (until_backlog_nextscan < 0 ||
2591 until_backlog_nextscan > backlog_retry_minperiods + 1)
2592 until_backlog_nextscan= backlog_retry_minperiods + 1;
2595 static void poll_backlog_file(void) {
2596 if (until_backlog_nextscan < 0) return;
2597 if (until_backlog_nextscan-- > 0) return;
2598 search_backlog_file();
2601 static void search_backlog_file(void) {
2602 /* returns non-0 iff there are any backlog files */
2607 const char *oldest_path=0;
2608 time_t oldest_mtime=0, now;
2610 if (backlog_input_file) return;
2614 r= glob(globpat_backlog, GLOB_ERR|GLOB_MARK|GLOB_NOSORT, 0, &gl);
2618 sysfatal("failed to expand backlog pattern %s", globpat_backlog);
2620 fatal("out of memory expanding backlog pattern %s", globpat_backlog);
2622 for (i=0; i<gl.gl_pathc; i++) {
2623 const char *path= gl.gl_pathv[i];
2625 if (strchr(path,'#') || strchr(path,'~')) {
2626 debug("backlog file search skipping %s", path);
2629 r= stat(path, &stab);
2631 syswarn("failed to stat backlog file %s", path);
2634 if (!S_ISREG(stab.st_mode)) {
2635 warn("backlog file %s is not a plain file (or link to one)", path);
2638 if (!oldest_path || stab.st_mtime < oldest_mtime) {
2640 oldest_mtime= stab.st_mtime;
2643 case GLOB_NOMATCH: /* fall through */
2646 sysdie("glob expansion of backlog pattern %s gave unexpected"
2647 " nonzero (error?) return value %d", globpat_backlog, r);
2651 debug("backlog scan: none");
2653 if (sms==sm_DROPPED) {
2654 notice("feed dropped and our work is complete");
2656 int r= unlink(path_control);
2657 if (r && errno!=ENOENT)
2658 syswarn("failed to remove control symlink for old feed");
2660 xunlink(path_lock, "lockfile for old feed");
2663 until_backlog_nextscan= backlog_spontrescan_periods;
2668 double age= difftime(now, oldest_mtime);
2669 long age_deficiency= (backlog_retry_minperiods * period_seconds) - age;
2671 if (age_deficiency <= 0) {
2672 debug("backlog scan: found age=%f deficiency=%ld oldest=%s",
2673 age, age_deficiency, oldest_path);
2675 backlog_input_file= open_input_file(oldest_path);
2676 if (!backlog_input_file) {
2677 warn("backlog file %s vanished as we opened it", oldest_path);
2681 inputfile_reading_start(backlog_input_file);
2682 until_backlog_nextscan= -1;
2686 until_backlog_nextscan= age_deficiency / period_seconds;
2688 if (backlog_spontrescan_periods >= 0 &&
2689 until_backlog_nextscan > backlog_spontrescan_periods)
2690 until_backlog_nextscan= backlog_spontrescan_periods;
2692 debug("backlog scan: young age=%f deficiency=%ld nextscan=%d oldest=%s",
2693 age, age_deficiency, until_backlog_nextscan, oldest_path);
2700 /*========== flushing the feed ==========*/
2702 static pid_t inndcomm_child;
2703 static int inndcomm_sentinel_fd;
2705 static void *inndcomm_event(oop_source *lp, int fd, oop_event e, void *u) {
2706 assert(inndcomm_child);
2707 assert(fd == inndcomm_sentinel_fd);
2708 int status= xwaitpid(&inndcomm_child, "inndcomm");
2711 cancel_fd_read_except(fd);
2712 xclose_perhaps(&fd, "inndcomm sentinel pipe",0);
2713 inndcomm_sentinel_fd= 0;
2715 assert(!flushing_input_file);
2717 if (WIFEXITED(status)) {
2718 switch (WEXITSTATUS(status)) {
2720 case INNDCOMMCHILD_ESTATUS_FAIL:
2723 case INNDCOMMCHILD_ESTATUS_NONESUCH:
2724 notice("feed has been dropped by innd, finishing up");
2725 flushing_input_file= main_input_file;
2726 tailing_queue_readable(flushing_input_file);
2727 /* we probably previously returned EAGAIN from our fake read method
2728 * when in fact we were at EOF, so signal another readable event
2729 * so we actually see the EOF */
2733 if (flushing_input_file) {
2734 SMS(DROPPING, 0, "feed dropped by innd, but must finish last flush");
2737 SMS(DROPPED, 0, "feed dropped by innd");
2738 search_backlog_file();
2740 return OOP_CONTINUE;
2744 flushing_input_file= main_input_file;
2745 tailing_queue_readable(flushing_input_file);
2747 main_input_file= open_input_file(feedfile);
2748 if (!main_input_file)
2749 die("flush succeeded but feedfile %s does not exist!", feedfile);
2751 if (flushing_input_file) {
2752 SMS(SEPARATED, spontaneous_flush_periods, "recovery flush complete");
2755 SMS(NORMAL, spontaneous_flush_periods, "flush complete");
2757 return OOP_CONTINUE;
2760 goto unexpected_exitstatus;
2763 } else if (WIFSIGNALED(status) && WTERMSIG(status) == SIGALRM) {
2764 warn("flush timed out trying to talk to innd");
2767 unexpected_exitstatus:
2768 report_child_status("inndcomm child", status);
2772 SMS(FLUSHFAILED, flushfail_retry_periods, "flush failed, will retry");
2773 return OOP_CONTINUE;
2776 static void inndcommfail(const char *what) {
2777 syswarn("error communicating with innd: %s failed: %s", what, ICCfailure);
2778 exit(INNDCOMMCHILD_ESTATUS_FAIL);
2781 void spawn_inndcomm_flush(const char *why) { /* Moved => Flushing */
2784 notice("flushing %s",why);
2786 assert(sms==sm_NORMAL || sms==sm_FLUSHFAILED);
2787 assert(!inndcomm_child);
2788 assert(!inndcomm_sentinel_fd);
2790 if (pipe(pipefds)) sysfatal("create pipe for inndcomm child sentinel");
2792 inndcomm_child= xfork("inndcomm child");
2794 if (!inndcomm_child) {
2795 const char *flushargv[2]= { sitename, 0 };
2799 xclose(pipefds[0], "(in child) inndcomm sentinel parent's end",0);
2800 /* parent spots the autoclose of pipefds[1] when we die or exit */
2802 if (simulate_flush>=0) {
2803 warn("SIMULATING flush child status %d", simulate_flush);
2804 if (simulate_flush>128) raise(simulate_flush-128);
2805 else exit(simulate_flush);
2808 alarm(inndcomm_flush_timeout);
2809 r= ICCopen(); if (r) inndcommfail("connect");
2810 r= ICCcommand('f',flushargv,&reply); if (r<0) inndcommfail("transmit");
2811 if (!r) exit(0); /* yay! */
2813 if (!strcmp(reply, "1 No such site")) exit(INNDCOMMCHILD_ESTATUS_NONESUCH);
2814 syswarn("innd ctlinnd flush failed: innd said %s", reply);
2815 exit(INNDCOMMCHILD_ESTATUS_FAIL);
2820 xclose(pipefds[1], "inndcomm sentinel child's end",0);
2821 inndcomm_sentinel_fd= pipefds[0];
2822 assert(inndcomm_sentinel_fd);
2823 on_fd_read_except(inndcomm_sentinel_fd, inndcomm_event);
2825 SMS(FLUSHING, 0, why);
2828 /*========== main program ==========*/
2830 static void postfork_inputfile(InputFile *ipf) {
2832 xclose(ipf->fd, "(in child) input file ", ipf->path);
2835 static void postfork_stdio(FILE *f, const char *what, const char *what2) {
2836 /* we have no stdio streams that are buffered long-term */
2838 if (fclose(f)) sysdie("(in child) close %s%s", what, what2?what2:0);
2841 static void postfork(void) {
2842 if (signal(SIGPIPE, SIG_DFL) == SIG_ERR)
2843 sysdie("(in child) failed to reset SIGPIPE");
2845 postfork_inputfile(main_input_file);
2846 postfork_inputfile(flushing_input_file);
2849 for (conn=LIST_HEAD(conns); conn; conn=LIST_NEXT(conn))
2850 conn_closefd(conn,"(in child) ");
2852 postfork_stdio(defer, "defer file ", path_defer);
2855 typedef struct Every Every;
2857 struct timeval interval;
2862 static void every_schedule(Every *e, struct timeval base);
2864 static void *every_happens(oop_source *lp, struct timeval base, void *e_v) {
2867 if (!e->fixed_rate) xgettimeofday(&base);
2868 every_schedule(e, base);
2869 return OOP_CONTINUE;
2872 static void every_schedule(Every *e, struct timeval base) {
2873 struct timeval when;
2874 timeradd(&base, &e->interval, &when);
2875 loop->on_time(loop, when, every_happens, e);
2878 static void every(int interval, int fixed_rate, void (*f)(void)) {
2879 Every *e= xmalloc(sizeof(*e));
2880 e->interval.tv_sec= interval;
2881 e->interval.tv_usec= 0;
2882 e->fixed_rate= fixed_rate;
2885 xgettimeofday(&now);
2886 every_schedule(e, now);
2889 static void filepoll(void) {
2890 filemon_callback(main_input_file);
2891 filemon_callback(flushing_input_file);
2894 static char *debug_report_ipf(InputFile *ipf) {
2895 if (!ipf) return xasprintf("none");
2897 const char *slash= strrchr(ipf->path,'/');
2898 const char *path= slash ? slash+1 : ipf->path;
2900 return xasprintf("%p/%s:ip=%ld,off=%ld,fd=%d%s",
2902 ipf->inprogress, (long)ipf->offset,
2903 ipf->fd, ipf->rd ? "" : ",!rd");
2906 static void period(void) {
2907 char *dipf_main= debug_report_ipf(main_input_file);
2908 char *dipf_flushing= debug_report_ipf(flushing_input_file);
2909 char *dipf_backlog= debug_report_ipf(backlog_input_file);
2912 " sms=%s[%d] conns=%d queue=%d until_connect=%d"
2913 " input_files main:%s flushing:%s backlog:%s"
2914 " children connecting=%ld inndcomm=%ld"
2916 sms_names[sms], sm_period_counter,
2917 conns.count, queue.count, until_connect,
2918 dipf_main, dipf_flushing, dipf_backlog,
2919 (long)connecting_child, (long)inndcomm_child
2923 free(dipf_flushing);
2926 if (until_connect) until_connect--;
2928 poll_backlog_file();
2929 if (!backlog_input_file) close_defer(); /* want to start on a new backlog */
2930 statemc_period_poll();
2931 check_assign_articles();
2936 /*========== option parsing ==========*/
2938 static void vbadusage(const char *fmt, va_list al) NORET_PRINTF(1,0);
2939 static void vbadusage(const char *fmt, va_list al) {
2940 char *m= xvasprintf(fmt,al);
2941 fprintf(stderr, "bad usage: %s\n"
2942 "say --help for help, or read the manpage\n",
2945 syslog(LOG_CRIT,"innduct: invoked with bad usage: %s",m);
2949 /*---------- generic option parser ----------*/
2951 static void badusage(const char *fmt, ...) NORET_PRINTF(1,2);
2952 static void badusage(const char *fmt, ...) {
2959 of_seconds= 001000u,
2960 of_boolean= 002000u,
2963 typedef struct Option Option;
2964 typedef void OptionParser(const Option*, const char *val);
2968 const char *lng, *formarg;
2974 static void parse_options(const Option *options, char ***argvp) {
2975 /* on return *argvp is first non-option arg; argc is not updated */
2978 const char *arg= *++(*argvp);
2980 if (*arg != '-') break;
2981 if (!strcmp(arg,"--")) { arg= *++(*argvp); break; }
2983 while ((a= *++arg)) {
2987 char *equals= strchr(arg,'=');
2988 int len= equals ? (equals - arg) : strlen(arg);
2989 for (o=options; o->shrt || o->lng; o++)
2990 if (strlen(o->lng) == len && !memcmp(o->lng,arg,len))
2992 badusage("unknown long option --%s",arg);
2995 if (equals) badusage("option --%s does not take a value",o->lng);
2997 } else if (equals) {
3001 if (!arg) badusage("option --%s needs a value for %s",
3002 o->lng, o->formarg);
3005 break; /* eaten the whole argument now */
3007 for (o=options; o->shrt || o->lng; o++)
3010 badusage("unknown short option -%c",a);
3017 if (!arg) badusage("option -%c needs a value for %s",
3018 o->shrt, o->formarg);
3021 break; /* eaten the whole argument now */
3027 #define DELIMPERHAPS(delim,str) (str) ? (delim) : "", (str) ? (str) : ""
3029 static void print_options(const Option *options, FILE *f) {
3031 for (o=options; o->shrt || o->lng; o++) {
3032 char shrt[2] = { o->shrt, 0 };
3033 char *optspec= xasprintf("%s%s%s%s%s",
3034 o->shrt ? "-" : "", shrt,
3035 o->shrt && o->lng ? "|" : "",
3036 DELIMPERHAPS("--", o->lng));
3037 fprintf(f, " %s%s%s\n", optspec, DELIMPERHAPS(" ", o->formarg));
3042 /*---------- specific option types ----------*/
3044 static void op_integer(const Option *o, const char *val) {
3047 unsigned long ul= strtoul(val,&ep,10);
3048 if (*ep || ep==val || errno || ul>INT_MAX)
3049 badusage("bad integer value for %s",o->lng);
3050 int *store= o->store;
3054 static void op_double(const Option *o, const char *val) {
3055 int *store= o->store;
3058 *store= strtod(val, &ep);
3059 if (*ep || ep==val || errno)
3060 badusage("bad floating point value for %s",o->lng);
3063 static void op_string(const Option *o, const char *val) {
3064 const char **store= o->store;
3068 static void op_seconds(const Option *o, const char *val) {
3069 int *store= o->store;
3073 double v= strtod(val,&ep);
3074 if (ep==val) badusage("bad time/duration value for %s",o->lng);
3076 if (!*ep || !strcmp(ep,"s") || !strcmp(ep,"sec")) unit= 1;
3077 else if (!strcmp(ep,"m") || !strcmp(ep,"min")) unit= 60;
3078 else if (!strcmp(ep,"h") || !strcmp(ep,"hour")) unit= 3600;
3079 else if (!strcmp(ep,"d") || !strcmp(ep,"day")) unit= 86400;
3080 else if (!strcmp(ep,"das")) unit= 10;
3081 else if (!strcmp(ep,"hs")) unit= 100;
3082 else if (!strcmp(ep,"ks")) unit= 1000;
3083 else if (!strcmp(ep,"Ms")) unit= 1000000;
3084 else badusage("bad units %s for time/duration value for %s",ep,o->lng);
3088 if (v > INT_MAX) badusage("time/duration value for %s out of range",o->lng);
3092 static void op_setint(const Option *o, const char *val) {
3093 int *store= o->store;
3097 /*---------- specific options ----------*/
3099 static void help(const Option *o, const char *val);
3101 static const Option innduct_options[]= {
3102 {'f',"feedfile", "F", &feedfile, op_string },
3103 {'q',"quiet-multiple", 0, &quiet_multiple, op_setint, 1 },
3104 {0,"no-daemon", 0, &become_daemon, op_setint, 0 },
3105 {0,"no-streaming", 0, &try_stream, op_setint, 0 },
3106 {'C',"inndconf", "F", &inndconffile, op_string },
3107 {'P',"port", "PORT", &port, op_integer },
3108 {0,"help", 0, 0, help },
3110 {0,"max-connections", "N", &max_connections, op_integer },
3111 {0,"max-queue-per-conn", "N", &max_queue_per_conn, op_integer },
3112 {0,"feedfile-flush-size","BYTES", &target_max_feedfile_size, op_integer },
3113 {0,"period-interval", "TIME", &period_seconds, op_seconds },
3115 {0,"connection-timeout", "TIME", &connection_setup_timeout, op_seconds },
3116 {0,"stuck-flush-timeout", "TIME", &inndcomm_flush_timeout, op_seconds },
3117 {0,"feedfile-poll", "TIME", &filepoll_seconds, op_seconds },
3119 {0,"no-check-proportion", "PERCENT", &nocheck_thresh, op_double },
3120 {0,"no-check-response-time","ARTICLES", &nocheck_decay, op_double },
3122 {0,"reconnect-interval", "PERIOD", &reconnect_delay_periods, op_seconds },
3123 {0,"flush-retry-interval", "PERIOD", &flushfail_retry_periods, op_seconds },
3124 {0,"earliest-deferred-retry","PERIOD", &backlog_retry_minperiods, op_seconds },
3125 {0,"backlog-rescan-interval","PERIOD",&backlog_spontrescan_periods,op_seconds},
3126 {0,"max-flush-interval", "PERIOD", &spontaneous_flush_periods,op_seconds },
3127 {0,"idle-timeout", "PERIOD", &need_activity_periods, op_seconds },
3129 {0,"max-bad-input-data-ratio","PERCENT", &max_bad_data_ratio, op_double },
3130 {0,"max-bad-input-data-init", "PERCENT", &max_bad_data_initial, op_integer },
3135 static void printusage(FILE *f) {
3136 fputs("usage: innduct [options] site [fqdn]\n"
3137 "available options are:\n", f);
3138 print_options(innduct_options, f);
3141 static void help(const Option *o, const char *val) {
3143 if (ferror(stdout) || fflush(stdout)) {
3144 perror("innduct: writing help");
3150 static void convert_to_periods_rndup(int *store) {
3151 *store += period_seconds-1;
3152 *store /= period_seconds;
3155 int main(int argc, char **argv) {
3161 parse_options(innduct_options, &argv);
3166 if (!sitename) badusage("need site name argument");
3167 remote_host= *argv++;
3168 if (*argv) badusage("too many non-option arguments");
3172 int r= innconf_read(inndconffile);
3173 if (!r) badusage("could not read inn.conf (more info on stderr)");
3175 if (!remote_host) remote_host= sitename;
3177 if (nocheck_thresh < 0 || nocheck_thresh > 100)
3178 badusage("nocheck threshold percentage must be between 0..100");
3179 nocheck_thresh *= 0.01;
3181 if (nocheck_decay < 0.1)
3182 badusage("nocheck decay articles must be at least 0.1");
3183 nocheck_decay= pow(0.5, 1.0/nocheck_decay);
3185 convert_to_periods_rndup(&reconnect_delay_periods);
3186 convert_to_periods_rndup(&flushfail_retry_periods);
3187 convert_to_periods_rndup(&backlog_retry_minperiods);
3188 convert_to_periods_rndup(&backlog_spontrescan_periods);
3189 convert_to_periods_rndup(&spontaneous_flush_periods);
3190 convert_to_periods_rndup(&need_activity_periods);
3192 if (max_bad_data_ratio < 0 || max_bad_data_ratio > 100)
3193 badusage("bad input data ratio must be between 0..100");
3194 max_bad_data_ratio *= 0.01;
3197 feedfile= xasprintf("%s/%s",innconf->pathoutgoing,sitename);
3198 } else if (!feedfile[0]) {
3199 badusage("feed filename must be nonempty");
3200 } else if (feedfile[strlen(feedfile)-1]=='/') {
3201 feedfile= xasprintf("%s%s",feedfile,sitename);
3204 const char *feedfile_forbidden= "?*[~#";
3206 while ((c= *feedfile_forbidden++))
3207 if (strchr(feedfile, c))
3208 badusage("feed filename may not contain metacharacter %c",c);
3212 path_lock= xasprintf("%s_lock", feedfile);
3213 path_flushing= xasprintf("%s_flushing", feedfile);
3214 path_defer= xasprintf("%s_defer", feedfile);
3215 path_control= xasprintf("%s_control", feedfile);
3216 globpat_backlog= xasprintf("%s_backlog*", feedfile);
3218 oop_source_sys *sysloop= oop_sys_new();
3219 if (!sysloop) sysdie("could not create liboop event loop");
3220 loop= (oop_source*)sysloop;
3222 if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
3223 sysdie("could not ignore SIGPIPE");
3228 if (become_daemon) {
3230 for (i=3; i<255; i++)
3231 /* do this now before we open syslog, etc. */
3233 openlog("innduct",LOG_NDELAY|LOG_PID,LOG_NEWS);
3235 int null= open("/dev/null",O_RDWR);
3236 if (null<0) sysfatal("failed to open /dev/null");
3240 xclose(null, "/dev/null original fd",0);
3242 pid_t child1= xfork("daemonise first fork");
3243 if (child1) _exit(0);
3245 pid_t sid= setsid();
3246 if (sid != child1) sysfatal("setsid failed");
3248 pid_t child2= xfork("daemonise second fork");
3249 if (child2) _exit(0);
3253 if (self_pid==-1) sysdie("getpid");
3264 if (!filemon_method_init()) {
3265 warn("filemon: no file monitoring available, polling");
3266 every(filepoll_seconds,0,filepoll);
3269 every(period_seconds,1,period);
3275 void *run= oop_sys_run(sysloop);
3276 assert(run == OOP_ERROR);
3277 sysdie("event loop failed");