1 /** \file fetchmail.h header file for fetchmail */
5 * For license terms, see the file COPYING in this directory.
8 /* We need this for HAVE_STDARG_H, etc */
13 /* We need this for size_t */
14 #include <sys/types.h>
16 /* We need this for time_t */
17 #if TIME_WITH_SYS_TIME
18 # include <sys/time.h>
22 # include <sys/time.h>
28 #ifdef HAVE_SYS_SOCKET_H
29 #include <sys/socket.h>
31 #ifdef HAVE_NET_SOCKET_H
32 #include <net/socket.h>
37 /* Import Trio if needed */
38 #if !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF)
39 # include "trio/trio.h"
42 /* We need this for strstr */
43 #if !defined(HAVE_STRSTR) && !defined(strstr)
44 char *strstr(const char *, const char *);
47 /* constants designating the various supported protocols */
57 #define SMTP_PORT "smtp"
58 #define SMTP_PORT_NUM 25
59 #define KPOP_PORT "kpop"
62 #define SIMAP_PORT 993
63 #define SPOP3_PORT 995
67 * We need to distinguish between mailbox and mailbag protocols.
68 * Under a mailbox protocol wwe're pulling mail for a speecific user.
69 * Under a mailbag protocol we're fetching mail for an entire domain.
71 #define MAILBOX_PROTOCOL(ctl) ((ctl)->server.protocol < P_ETRN)
73 /* authentication types */
74 #define A_ANY 0 /* use the first method that works */
75 #define A_PASSWORD 1 /* password authentication */
76 #define A_NTLM 2 /* Microsoft NTLM protocol */
77 #define A_CRAM_MD5 3 /* CRAM-MD5 shrouding (RFC2195) */
78 #define A_OTP 4 /* One-time password (RFC1508) */
79 #define A_KERBEROS_V4 5 /* authenticate w/ Kerberos V4 */
80 #define A_KERBEROS_V5 6 /* authenticate w/ Kerberos V5 */
81 #define A_GSSAPI 7 /* authenticate with GSSAPI */
82 #define A_SSH 8 /* authentication at session level */
83 #define A_MSN 9 /* same as NTLM with keyword MSN */
84 #define A_EXTERNAL 10 /* external authentication (client cert) */
86 /* some protocols or authentication types (KERBEROS, GSSAPI, SSH) don't
87 * require a password */
88 #define NO_PASSWORD(ctl) \
89 ((ctl)->server.authenticate == A_OTP \
90 || (ctl)->server.authenticate == A_KERBEROS_V4 \
91 || (ctl)->server.authenticate == A_KERBEROS_V5 \
92 || (ctl)->server.authenticate == A_GSSAPI \
93 || (ctl)->server.authenticate == A_SSH \
94 || (ctl)->server.authenticate == A_EXTERNAL \
95 || (ctl)->server.protocol == P_ETRN)
98 * Definitions for buffer sizes. We get little help on setting maxima
99 * from IMAP RFCs up to 2060, so these are mostly from POP3.
101 #define HOSTLEN 635 /* max hostname length (RFC1123) */
102 #define POPBUFSIZE 512 /* max length of response (RFC1939) */
103 #define IDLEN 128 /* max length of UID (RFC1939) */
105 /* per RFC1939 this should be 40, but Microsoft Exchange ignores that limit */
106 #define USERNAMELEN 128 /* max POP3 arg length */
108 /* clear a netBSD kernel parameter out of the way */
112 * The RFC822 limit on message line size is just 998. But
113 * make this *way* oversized; idiot DOS-world mailers that
114 * don't line-wrap properly often ship entire paragraphs as
117 #define MSGBUFSIZE 8192
119 #define NAMELEN 64 /* max username length */
120 #define PASSWORDLEN 64 /* max password length */
121 #define DIGESTLEN 33 /* length of MD5 digest */
123 /* exit code values */
124 /* NOTE THAT PS_SUCCESS MUST ALWAYS BE 0 - SOME PARTS OF THE CODE
125 * RELY ON THIS VALUE! */
126 #define PS_SUCCESS 0 /* successful receipt of messages */
127 #define PS_NOMAIL 1 /* no mail available */
128 #define PS_SOCKET 2 /* socket I/O woes */
129 #define PS_AUTHFAIL 3 /* user authorization failed */
130 #define PS_PROTOCOL 4 /* protocol violation */
131 #define PS_SYNTAX 5 /* command-line syntax error */
132 #define PS_IOERR 6 /* bad permissions on rc file */
133 #define PS_ERROR 7 /* protocol error */
134 #define PS_EXCLUDE 8 /* client-side exclusion error */
135 #define PS_LOCKBUSY 9 /* server responded lock busy */
136 #define PS_SMTP 10 /* SMTP error */
137 #define PS_DNS 11 /* fatal DNS error */
138 #define PS_BSMTP 12 /* output batch could not be opened */
139 #define PS_MAXFETCH 13 /* poll ended by fetch limit */
140 #define PS_SERVBUSY 14 /* server is busy */
141 /* leave space for more codes */
142 #define PS_UNDEFINED 23 /* something I hadn't thought of */
143 #define PS_TRANSIENT 24 /* transient failure (internal use) */
144 #define PS_REFUSED 25 /* mail refused (internal use) */
145 #define PS_RETAINED 26 /* message retained (internal use) */
146 #define PS_REPOLL 28 /* repoll immediately with changed parameters (internal use) */
147 #define PS_IDLETIMEOUT 29 /* timeout on imap IDLE (internal use) */
148 #define PS_UNTAGGED 30 /* untagged response on imap command (internal use) */
150 /* output noise level */
151 #define O_SILENT 0 /* mute, max squelch, etc. */
152 #define O_NORMAL 1 /* user-friendly */
153 #define O_VERBOSE 2 /* chatty */
154 #define O_DEBUG 3 /* prolix */
155 #define O_MONITOR O_VERBOSE
157 #define SIZETICKER 1024 /* print 1 dot per this many bytes */
160 * We #ifdef this and use flag rather than bool
161 * to avoid a type clash with curses.h
169 /* we need to use zero as a flag-uninitialized value */
173 /** run control data */
176 char *logfile; /** where to write log information */
177 char *idfile; /** where to store UID data */
178 char *pidfile; /** where to record the PID of daemon mode processes */
179 const char *postmaster;
181 int poll_interval; /** poll interval in seconds (daemon mode, 0 == off) */
198 flag mark; /* UID-index information */
199 #define UID_UNSEEN 0 /* hasn't been seen */
200 #define UID_SEEN 1 /* seen, but not deleted */
201 #define UID_DELETED 2 /* this message has been marked deleted */
202 #define UID_EXPUNGED 3 /* this message has been expunged */
212 struct method /* describe methods for protocol state machine */
214 const char *name; /* protocol name */
215 const char *service; /* service port (unencrypted) */
216 const char *sslservice; /* service port (SSL) */
217 flag tagged; /* if true, generate & expect command tags */
218 flag delimited; /* if true, accept "." message delimiter */
219 int (*parse_response)(int, char *);
220 /* response_parsing function */
221 int (*getauth)(int, struct query *, char *);
222 /* authorization fetcher */
223 int (*getrange)(int, struct query *, const char *, int *, int *, int *);
224 /* get message range to fetch */
225 int (*getsizes)(int, int, int *);
226 /* get sizes of messages */
227 int (*getpartialsizes)(int, int, int, int *);
228 /* get sizes of subset of messages */
229 int (*is_old)(int, struct query *, int);
230 /* check for old message */
231 int (*fetch_headers)(int, struct query *, int, int *);
232 /* fetch header from a given message */
233 int (*fetch_body)(int, struct query *, int, int *);
234 /* fetch a given message */
235 int (*trail)(int, struct query *, const char *);
236 /* eat trailer of a message */
237 int (*delete_msg)(int, struct query *, int);
239 int (*mark_seen)(int, struct query *, int);
240 /* mark as seen method */
241 int (*end_mailbox_poll)(int, struct query *);
242 /* end-of-mailbox processing */
243 int (*logout_cmd)(int, struct query *);
245 flag retry; /* can getrange poll for new messages? */
248 enum badheader { BHREJECT = 0, BHACCEPT };
250 struct hostdata /* shared among all user connections to given server */
253 char *pollname; /* poll label of host */
254 char *via; /* "true" server name if non-NULL */
255 struct idlist *akalist; /* server name first, then akas */
256 struct idlist *localdomains; /* list of pass-through domains */
257 int protocol; /* protocol type */
258 const char *service; /* service name */
259 int interval; /* # cycles to skip between polls */
260 int authenticate; /* authentication mode to try */
261 int timeout; /* inactivity timout in seconds */
262 char *envelope; /* envelope address list header */
263 int envskip; /* skip to numbered envelope header */
264 char *qvirtual; /* prefix removed from local user id */
265 flag skip; /* suppress poll in implicit mode? */
266 flag dns; /* do DNS lookup on multidrop? */
267 flag uidl; /* use RFC1725 UIDLs? */
269 flag sdps; /* use Demon Internet SDPS *ENV */
270 #endif /* SDPS_ENABLE */
271 flag checkalias; /* resolve aliases by comparing IPs? */
272 flag tracepolls; /* if TRUE, add poll trace info to Received */
273 char *principal; /* Kerberos principal for mail service */
274 char *esmtp_name, *esmtp_password; /* ESMTP AUTH information */
275 enum badheader badheader; /* bad-header {pass|reject} */
277 #if defined(linux) || defined(__FreeBSD__)
285 struct interface_pair_s *interface_pair;
288 char *plugin,*plugout;
290 /* computed for internal use */
291 const struct method *base_protocol; /* relevant protocol method table */
292 int poll_count; /* count of polls so far */
293 char *queryname; /* name to attempt DNS lookup on */
294 char *truename; /* "true name" of server host */
295 struct sockaddr *trueaddr; /* IP address of truename */
296 size_t trueaddr_len; /* size of trueaddr data */
297 struct hostdata *lead_server; /* ptr to lead query for this server */
299 int workarounds; /* track which workarounds the user was warned about */
303 * bit flags to set in workarounds after the corresponding warning,
304 * which we assume to be server-specific, has been printed,
305 * so we don't spam our users in daemon mode.
307 #define WKA_TOP (1L << 0) /* Maillennium TOP -> RETR override warning */
311 /* mailserver connection controls */
312 struct hostdata server;
315 struct idlist *localnames; /* including calling user's name */
316 int wildcard; /* should unmatched names be passed through */
317 char *remotename; /* remote login name to use */
318 char *password; /* remote password to use */
319 struct idlist *mailboxes; /* list of mailboxes to check */
321 /* per-forwarding-target data */
322 struct idlist *smtphunt; /* list of SMTP hosts to try forwarding to */
323 struct idlist *domainlist; /* domainlist to fetch from */
324 char *smtpaddress; /* address to force in RCPT TO */
325 char *smtpname; /* full RCPT TO name, including domain */
326 struct idlist *antispam; /* list of listener's antispam response */
327 const char *mda; /* local MDA to pass mail to */
328 char *bsmtp; /* BSMTP output file */
329 char listener; /* what's the listener's wire protocol? */
330 #define SMTP_MODE 'S'
331 #define LMTP_MODE 'L'
332 char *preconnect; /* pre-connection command to execute */
333 char *postconnect; /* post-connection command to execute */
335 /* per-user control flags */
336 flag keep; /* if TRUE, leave messages undeleted */
337 flag fetchall; /* if TRUE, fetch all (not just unseen) */
338 flag flush; /* if TRUE, delete messages already seen */
339 flag limitflush; /* if TRUE, delete oversized mails */
340 flag rewrite; /* if TRUE, canonicalize recipient addresses */
341 flag stripcr; /* if TRUE, strip CRs in text */
342 flag forcecr; /* if TRUE, force CRs before LFs in text */
343 flag pass8bits; /* if TRUE, ignore Content-Transfer-Encoding */
344 flag dropstatus; /* if TRUE, drop Status lines in mail */
345 flag dropdelivered; /* if TRUE, drop Delivered-To lines in mail */
346 flag mimedecode; /* if TRUE, decode MIME-armored messages */
347 flag idle; /* if TRUE, idle after each poll */
348 int limit; /* limit size of retrieved messages */
349 int warnings; /* size warning interval */
350 int fetchlimit; /* max # msgs to get in single poll */
351 int fetchsizelimit; /* max # msg sizes to get in a request */
352 int fastuidl; /* do binary search for new UIDLs? */
353 int fastuidlcount; /* internal count for frequency of binary search */
354 int batchlimit; /* max # msgs to pass in single SMTP session */
355 int expunge; /* max # msgs to pass between expunges */
356 flag use_ssl; /* use SSL encrypted session */
357 char *sslkey; /* optional SSL private key file */
358 char *sslcert; /* optional SSL certificate file */
359 char *sslproto; /** force transport protocol (ssl2|ssl3|ssl23|tls1) - if NULL,
360 use ssl23 for SSL and opportunistic tls1 for non-SSL connections. */
361 char *sslcertpath; /* Trusted certificate directory for checking the server cert */
362 flag sslcertck; /* Strictly check the server cert. */
363 char *sslcommonname; /* CommonName to expect from server */
364 char *sslfingerprint; /* Fingerprint to check against */
365 char *properties; /* passthrough properties for extensions */
367 /* internal use -- per-poll state */
368 flag active; /* should we actually poll this server? */
369 char *destaddr; /* destination host for this query */
370 int errcount; /* count transient errors in last pass */
371 int authfailcount; /* count of authorization failures */
372 int wehaveauthed; /* We've managed to logon at least once! */
373 int wehavesentauthnote; /* We've sent an authorization failure note */
374 int wedged; /* wedged by auth failures or timeouts? */
375 char *smtphost; /* actual SMTP host we connected to */
376 char smtphostmode; /* what's the actual SMTP host's wire protocol? */
377 int smtp_socket; /* socket descriptor for SMTP connection */
378 unsigned int uid; /* UID of user to deliver to */
379 struct idlist *skipped; /* messages skipped on the mail server */
380 struct idlist *oldsaved, *newsaved;
381 struct idlist **oldsavedend;
382 char lastdigest[DIGESTLEN]; /* last MD5 hash seen on this connection */
383 char *folder; /* folder currently being polled */
385 /* internal use -- per-message state */
386 int mimemsg; /* bitmask indicating MIME body-type */
387 unsigned char digest[DIGESTLEN]; /* md5 digest buffer */
389 /* internal use -- housekeeping */
390 struct query *next; /* next query control block in chain */
393 struct msgblk /* message header parsed for open_sink() */
395 char *headers; /* raw message headers */
396 struct idlist *recipients; /* addressees */
397 char return_path[HOSTLEN + USERNAMELEN + 4];
404 * Numeric option handling. Numeric option value of zero actually means
405 * it's unspecified. Value less than zero is zero. The reason for this
406 * screwy encoding is so we can zero out an option block in order to set the
407 * numeric flags in it to unspecified.
409 #define NUM_VALUE_IN(n) (((n) == 0) ? -1 : (n))
410 #define NUM_VALUE_OUT(n) (((n) < 0) ? 0 : (n))
411 #define NUM_NONZERO(n) ((n) > 0)
412 #define NUM_ZERO(n) ((n) < 0)
413 #define NUM_SPECIFIED(n) ((n) != 0)
415 #define MULTIDROP(ctl) (ctl->wildcard || \
416 ((ctl)->localnames && (ctl)->localnames->next))
419 * Note: tags are generated with an a%04d format from a 1-origin
420 * integer sequence number. Length 4 permits transaction numbers
421 * up to 9999, so we force rollover with % 10000. There's no special
422 * reason for this format other than to look like the exmples in the
425 #define TAGLEN 6 /* 'a' + 4 digits + NUL */
426 extern char tag[TAGLEN];
429 /* list of hosts assembled from run control file and command line */
430 extern struct query cmd_opts, *querylist;
432 /* what's returned by envquery */
433 extern void envquery(int, char **);
435 /* controls the detail level of status/progress messages written to stderr */
436 extern int outlevel; /* see the O_.* constants above */
437 extern int yydebug; /* enable parse debugging */
439 /* these get computed */
440 extern int batchcount; /* count of messages sent in current batch */
441 extern flag peek_capable; /* can we read msgs without setting seen? */
443 /* miscellaneous global controls */
444 extern struct runctl run; /* global controls for this run */
445 extern flag nodetach; /* if TRUE, don't detach daemon process */
446 extern flag quitmode; /* if --quit was set */
447 extern int quitind; /* optind after position of last --quit option */
448 extern flag check_only; /* if --check was set */
449 extern char *rcfile; /* path name of rc file */
450 extern int linelimit; /* limit # lines retrieved per site */
451 extern flag versioninfo; /* emit only version info */
452 extern char *user; /* name of invoking user */
453 extern char *home; /* home directory of invoking user */
454 extern char *fmhome; /* fetchmail home directory */
455 extern int pass; /* number of re-polling pass */
456 extern flag configdump; /* dump control blocks as Python dictionary */
457 extern const char *fetchmailhost; /* either "localhost" or an FQDN */
458 extern int suppress_tags; /* suppress tags in tagged protocols? */
459 extern char shroud[PASSWORDLEN*2+3]; /* string to shroud in debug output */
461 extern char *sdps_envfrom;
462 extern char *sdps_envto;
463 #endif /* SDPS_ENABLE */
465 extern const char *iana_charset; /* IANA assigned charset name */
467 /* from ucs/norm_charmap.c */
468 const char *norm_charmap(const char *name);
470 /* prototypes for globally callable functions */
472 /* from /usr/include/sys/cdefs.h */
473 #if !defined __GNUC__ || __GNUC__ < 2
474 # define __attribute__(xyz) /* Ignore. */
477 /* error.c: Error reporting */
478 #if defined(HAVE_STDARG_H)
479 void report_init(int foreground);
480 /** Flush partial message, suppress program name tag for next report printout. */
481 void report_flush(FILE *fp);
482 void report (FILE *fp, const char *format, ...)
483 __attribute__ ((format (printf, 2, 3)))
485 void report_build (FILE *fp, const char *format, ...)
486 __attribute__ ((format (printf, 2, 3)))
488 void report_complete (FILE *fp, const char *format, ...)
489 __attribute__ ((format (printf, 2, 3)))
491 void report_at_line (FILE *fp, int, const char *, unsigned int, const char *, ...)
492 __attribute__ ((format (printf, 5, 6)))
496 void report_build ();
497 void report_complete ();
498 void report_at_line ();
501 /* driver.c -- main driver loop */
502 void set_timeout(int);
503 int is_idletimeout(void);
504 void resetidletimeout(void);
505 int do_protocol(struct query *, const struct method *);
507 /* transact.c: transaction support */
508 void init_transact(const struct method *);
509 int readheaders(int sock,
514 flag *suppress_readbody);
515 int readbody(int sock, struct query *ctl, flag forward, int len);
516 #if defined(HAVE_STDARG_H)
517 void gen_send(int sock, const char *, ... )
518 __attribute__ ((format (printf, 2, 3)))
520 int gen_recv(int sock, char *buf, int size);
521 int gen_transact(int sock, const char *, ... )
522 __attribute__ ((format (printf, 2, 3)))
529 extern struct msgblk msgblk;
531 /* use these to track what was happening when the nonresponse timer fired */
532 #define GENERAL_WAIT 0 /* unknown wait type */
533 #define OPEN_WAIT 1 /* waiting from mailserver open */
534 #define SERVER_WAIT 2 /* waiting for mailserver response */
535 #define LISTENER_WAIT 3 /* waiting for listener initialization */
536 #define FORWARDING_WAIT 4 /* waiting for listener response */
539 /* response hooks can use this to identify the query stage */
540 #define STAGE_GETAUTH 0
541 #define STAGE_GETRANGE 1
542 #define STAGE_GETSIZES 2
543 #define STAGE_FETCH 3
545 #define STAGE_LOGOUT 5
548 extern int mytimeout;
550 /* mark values for name lists */
551 #define XMIT_ACCEPT 1 /* accepted; matches local domain or name */
552 #define XMIT_REJECT 2 /* rejected; no match */
553 #define XMIT_RCPTBAD 3 /* SMTP listener rejected the name */
556 int interruptible_idle(int interval);
557 extern volatile int lastsig;
559 /* sink.c: forwarding */
560 void smtp_close(struct query *, int);
561 int smtp_open(struct query *);
562 int smtp_setup(struct query *);
563 char *rcpt_address(struct query *, const char *, int);
564 int stuffline(struct query *, char *);
565 int open_sink(struct query*, struct msgblk *, int*, int*);
566 void release_sink(struct query *);
567 int close_sink(struct query *, struct msgblk *, flag);
568 int open_warning_by_mail(struct query *);
569 #if defined(HAVE_STDARG_H)
570 void stuff_warning(const char *, struct query *, const char *, ... )
571 __attribute__ ((format (printf, 3, 4)))
574 void stuff_warning();
576 void close_warning_by_mail(struct query *, struct msgblk *);
578 /* rfc822.c: RFC822 header parsing */
579 char *reply_hack(char *, const char *, size_t *);
580 char *nxtaddr(const char *);
582 /* uid.c: UID support */
583 extern int dofastuidl;
585 void initialize_saved_lists(struct query *, const char *);
586 struct idlist *save_str(struct idlist **, const char *, flag);
587 void free_str_list(struct idlist **);
588 struct idlist *copy_str_list(struct idlist *idl);
589 void save_str_pair(struct idlist **, const char *, const char *);
590 void free_str_pair_list(struct idlist **);
591 int delete_str(struct idlist **, long);
592 struct idlist *str_in_list(struct idlist **, const char *, const flag);
593 int str_nr_in_list(struct idlist **, const char *);
594 int str_nr_last_in_list(struct idlist **, const char *);
595 void str_set_mark( struct idlist **, const char *, const flag);
596 int count_list( struct idlist **idl );
597 char *str_from_nr_list( struct idlist **idl, long number );
598 char *str_find(struct idlist **, long);
599 struct idlist *id_find(struct idlist **idl, long);
600 char *idpair_find(struct idlist **, const char *);
601 void append_str_list(struct idlist **, struct idlist **);
602 void expunge_uids(struct query *);
603 void uid_swap_lists(struct query *);
604 void uid_discard_new_list(struct query *ctl);
605 void uid_reset_num(struct query *ctl);
606 void write_saved_lists(struct query *, const char *);
609 int prc_parse_file(const char *, const flag);
610 int prc_filecheck(const char *, const flag);
613 void to64frombits(char *, const void *, int);
614 int from64tobits(void *, const char *, int maxlen);
617 /* Bit-mask returned by MimeBodyType */
618 #define MSG_IS_7BIT 0x01
619 #define MSG_IS_8BIT 0x02
620 #define MSG_NEEDS_DECODE 0x80
621 extern void UnMimeHeader(char *buf);
622 extern int MimeBodyType(char *hdrs, int WantDecode);
623 extern int UnMimeBodyline(char **buf, flag delimited, flag issoftline);
626 void interface_init(void);
627 void interface_parse(char *, struct hostdata *);
628 void interface_note_activity(struct hostdata *);
629 int interface_approve(struct hostdata *, flag domonitor);
633 /* protocol driver and methods */
634 int doPOP2 (struct query *);
635 int doPOP3 (struct query *);
636 int doIMAP (struct query *);
637 int doETRN (struct query *);
638 int doODMR (struct query *);
640 /* authentication functions */
641 int do_cram_md5(int sock, const char *command, struct query *ctl, const char *strip);
642 int do_rfc1731(int sock, const char *command, const char *truename);
643 int do_gssauth(int sock, const char *command, const char *service, const char *hostname, const char *username);
644 int do_otp(int sock, const char *command, struct query *ctl);
648 /* these should be of size PATH_MAX */
649 extern char currentwd[1024], rcfiledir[1024];
651 struct query *hostalloc(struct query *);
652 int parsecmdline (int, char **, struct runctl *, struct query *);
653 char *prependdir (const char *, const char *);
654 unsigned char *MD5Digest (unsigned const char *);
655 void hmac_md5 (const unsigned char *, size_t, const char *, size_t, unsigned char *, size_t);
656 int POP3_auth_rpa(char *, char *, int socket);
657 typedef RETSIGTYPE (*SIGHANDLERTYPE) (int);
658 void deal_with_sigchld(void);
659 RETSIGTYPE null_signal_handler(int sig);
660 SIGHANDLERTYPE set_signal_handler(int sig, SIGHANDLERTYPE handler);
661 int daemonize(const char *);
662 char *fm_getpassword(char *);
663 void escapes(const char *, char *);
664 char *visbuf(const char *);
665 const char *showproto(int);
666 void dump_config(struct runctl *runp, struct query *querylist);
667 int is_host_alias(const char *, struct query *, struct addrinfo **);
669 extern struct addrinfo *ai0, *ai1;
671 /** Try to obtain fully qualified hostname of current host. Exit with
672 * PS_DNS if \a required is true and there is a DNS error. Exit with
673 * PS_DNS if gethostname() fails, independent of the value of \a
676 * - fully qualified hostname if \a required is non-zero.
677 * - unqualified or fully qualified hostname if \a required is zero (0).
679 char *host_fqdn(int required /** exit with PS_DNS if the name cannot be qualified */);
680 char *rfc822timestamp(void);
682 char *rfc2047e(const char*, const char *);
684 void yyerror(const char *);
688 void itimerthread(void*);
689 /* Have to include these first to avoid errors from redefining getcwd
690 and chdir. They're re-include protected in EMX, so it's okay, I
694 /* Redefine getcwd and chdir to get drive-letter support so we can
695 find all of our lock files and stuff. */
696 #define getcwd _getcwd2
697 #define chdir _chdir2
701 # if !defined(strerror) && !defined(HAVE_DECL_STRERROR) /* On some systems, strerror is a macro */
702 char *strerror (int);
704 #endif /* HAVE_STRERROR */
706 #define STRING_DISABLED (char *)-1
707 #define STRING_DUMMY ""
711 #define S_IXGRP 0000010
716 char *stpcpy(char *, const char*);
721 #else /* !__CYGWIN__ */
723 #endif /* __CYGWIN__ */
725 extern int mailserver_socket_temp;
726 extern const char *program_name;
728 /* POSIX space characters,
729 * <tab>;<newline>;<vertical-tab>;<form-feed>;<carriage-return>;<space> */
730 #define POSIX_space "\t\n\v\f\r "
732 /* strlcpy/strlcat prototypes */
735 strlcat(char *dst, const char *src, size_t siz);
739 strlcpy(char *dst, const char *src, size_t siz);
742 /** Resolve the a TCP service name or a string containing only a decimal
743 * positive integer to a port number. Returns -1 for error. */
744 int servport(const char *service);
746 #ifndef HAVE_GETNAMEINFO
747 # define NI_NUMERICHOST 1
748 # define NI_NUMERICSERV 2
750 # define NI_NAMEREQD 8
754 int fm_getaddrinfo(const char *node, const char *serv, const struct addrinfo *hints, struct addrinfo **res);
755 void fm_freeaddrinfo(struct addrinfo *ai);
757 /* prototypes from tls.c */
758 int maybe_tls(struct query *ctl);
759 int must_tls(struct query *ctl);
761 /* prototype from rfc822valid.c */
762 int rfc822_valid_msgid(const unsigned char *);
764 /* macro to determine if we want to spam progress to stdout */
765 #define want_progress() \
766 ((outlevel >= O_VERBOSE || (outlevel > O_SILENT && run.showdots)) \
768 && (run.showdots || !is_a_file(1)))
771 /* fetchmail.h ends here */