mx.c
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上传日期:2007-01-04
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- /*
- * Program: MX mail routines
- *
- * Author(s): Mark Crispin
- * Networks and Distributed Computing
- * Computing & Communications
- * University of Washington
- * Administration Building, AG-44
- * Seattle, WA 98195
- * Internet: MRC@CAC.Washington.EDU
- *
- * Date: 3 May 1996
- * Last Edited: 12 November 1999
- *
- * Copyright 1999 by the University of Washington
- *
- * Permission to use, copy, modify, and distribute this software and its
- * documentation for any purpose and without fee is hereby granted, provided
- * that the above copyright notice appears in all copies and that both the
- * above copyright notice and this permission notice appear in supporting
- * documentation, and that the name of the University of Washington not be
- * used in advertising or publicity pertaining to distribution of the software
- * without specific, written prior permission. This software is made
- * available "as is", and
- * THE UNIVERSITY OF WASHINGTON DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED,
- * WITH REGARD TO THIS SOFTWARE, INCLUDING WITHOUT LIMITATION ALL IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, AND IN
- * NO EVENT SHALL THE UNIVERSITY OF WASHINGTON BE LIABLE FOR ANY SPECIAL,
- * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
- * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, TORT
- * (INCLUDING NEGLIGENCE) OR STRICT LIABILITY, ARISING OUT OF OR IN CONNECTION
- * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- *
- */
- #include <stdio.h>
- #include <ctype.h>
- #include <errno.h>
- extern int errno; /* just in case */
- #include "mail.h"
- #include "osdep.h"
- #include <pwd.h>
- #include <sys/stat.h>
- #include <sys/time.h>
- #include "mx.h"
- #include "misc.h"
- #include "dummy.h"
- /* MX mail routines */
- /* Driver dispatch used by MAIL */
- DRIVER mxdriver = {
- "mx", /* driver name */
- /* driver flags */
- DR_MAIL|DR_LOCAL|DR_NOFAST|DR_CRLF,
- (DRIVER *) NIL, /* next driver */
- mx_valid, /* mailbox is valid for us */
- mx_parameters, /* manipulate parameters */
- mx_scan, /* scan mailboxes */
- mx_list, /* find mailboxes */
- mx_lsub, /* find subscribed mailboxes */
- mx_subscribe, /* subscribe to mailbox */
- mx_unsubscribe, /* unsubscribe from mailbox */
- mx_create, /* create mailbox */
- mx_delete, /* delete mailbox */
- mx_rename, /* rename mailbox */
- NIL, /* status of mailbox */
- mx_open, /* open mailbox */
- mx_close, /* close mailbox */
- mx_fast, /* fetch message "fast" attributes */
- NIL, /* fetch message flags */
- NIL, /* fetch overview */
- NIL, /* fetch message envelopes */
- mx_header, /* fetch message header only */
- mx_text, /* fetch message body only */
- NIL, /* fetch partial message test */
- NIL, /* unique identifier */
- NIL, /* message number */
- mx_flag, /* modify flags */
- mx_flagmsg, /* per-message modify flags */
- NIL, /* search for message based on criteria */
- NIL, /* sort messages */
- NIL, /* thread messages */
- mx_ping, /* ping mailbox to see if still alive */
- mx_check, /* check for new messages */
- mx_expunge, /* expunge deleted messages */
- mx_copy, /* copy messages to another mailbox */
- mx_append, /* append string message to mailbox */
- NIL /* garbage collect stream */
- };
- /* prototype stream */
- MAILSTREAM mxproto = {&mxdriver};
- /* MX mail validate mailbox
- * Accepts: mailbox name
- * Returns: our driver if name is valid, NIL otherwise
- */
- DRIVER *mx_valid (char *name)
- {
- char tmp[MAILTMPLEN];
- return mx_isvalid (name,tmp) ? &mxdriver : NIL;
- }
- /* MX mail test for valid mailbox
- * Accepts: mailbox name
- * temporary buffer to use
- * Returns: T if valid, NIL otherwise
- */
- int mx_isvalid (char *name,char *tmp)
- {
- struct stat sbuf;
- errno = NIL; /* zap error */
- /* validate name as directory */
- return (!stat (MXINDEX (tmp,name),&sbuf) &&
- ((sbuf.st_mode & S_IFMT) == S_IFREG));
- }
- /* MX manipulate driver parameters
- * Accepts: function code
- * function-dependent value
- * Returns: function-dependent return value
- */
- void *mx_parameters (long function,void *value)
- {
- return NIL;
- }
- /* MX scan mailboxes
- * Accepts: mail stream
- * reference
- * pattern to search
- * string to scan
- */
- void mx_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents)
- {
- if (stream) mm_log ("Scan not valid for mx mailboxes",ERROR);
- }
- /* MX list mailboxes
- * Accepts: mail stream
- * reference
- * pattern to search
- */
- void mx_list (MAILSTREAM *stream,char *ref,char *pat)
- {
- char *s,test[MAILTMPLEN],file[MAILTMPLEN];
- long i = 0;
- /* get canonical form of name */
- if (stream && dummy_canonicalize (test,ref,pat)) {
- /* found any wildcards? */
- if (s = strpbrk (test,"%*")) {
- /* yes, copy name up to that point */
- strncpy (file,test,i = s - test);
- file[i] = ' '; /* tie off */
- }
- else strcpy (file,test); /* use just that name then */
- /* find directory name */
- if (s = strrchr (file,'/')) {
- *s = ' '; /* found, tie off at that point */
- s = file;
- }
- /* do the work */
- mx_list_work (stream,s,test,0);
- }
- }
- /* MX list subscribed mailboxes
- * Accepts: mail stream
- * reference
- * pattern to search
- */
- void mx_lsub (MAILSTREAM *stream,char *ref,char *pat)
- {
- if (stream) dummy_lsub (NIL,ref,pat);
- }
- /* MX list mailboxes worker routine
- * Accepts: mail stream
- * directory name to search
- * search pattern
- * search level
- */
- void mx_list_work (MAILSTREAM *stream,char *dir,char *pat,long level)
- {
- DIR *dp;
- struct direct *d;
- struct stat sbuf;
- char *cp,*np,curdir[MAILTMPLEN],name[MAILTMPLEN];
- /* make mailbox and directory names */
- if ((np = name + strlen (strcpy (name,dir ? dir : ""))) != name) *np++ = '/';
- cp = curdir + strlen (strcat ((mx_file(curdir,dir ? dir:myhomedir())),"/"));
- if (dp = opendir (curdir)) { /* open directory */
- while (d = readdir (dp)) { /* scan, ignore . and numeric names */
- if ((d->d_name[0] != '.') && !mx_select (d)) {
- if (level < (long) mail_parameters (NIL,GET_LISTMAXLEVEL,NIL)) {
- strcpy (cp,d->d_name);/* make directory name */
- strcpy (np,d->d_name);/* make mx name of directory name */
- if (dmatch (name,pat,'/') && !stat (curdir,&sbuf) &&
- ((sbuf.st_mode &= S_IFMT) == S_IFDIR))
- mx_list_work (stream,name,pat,level+1);
- }
- }
- else if (!strcmp (d->d_name,MXINDEXNAME+1) && pmatch_full (dir,pat,'/'))
- mm_list (stream,'/',dir,NIL);
- }
- closedir (dp); /* all done, flush directory */
- }
- }
- /* MX mail subscribe to mailbox
- * Accepts: mail stream
- * mailbox to add to subscription list
- * Returns: T on success, NIL on failure
- */
- long mx_subscribe (MAILSTREAM *stream,char *mailbox)
- {
- return sm_subscribe (mailbox);
- }
- /* MX mail unsubscribe to mailbox
- * Accepts: mail stream
- * mailbox to delete from subscription list
- * Returns: T on success, NIL on failure
- */
- long mx_unsubscribe (MAILSTREAM *stream,char *mailbox)
- {
- return sm_unsubscribe (mailbox);
- }
- /* MX mail create mailbox
- * Accepts: mail stream
- * mailbox name to create
- * Returns: T on success, NIL on failure
- */
- long mx_create (MAILSTREAM *stream,char *mailbox)
- {
- int fd;
- char *s,tmp[MAILTMPLEN],mbx[MAILTMPLEN];
- /* assume error */
- sprintf (tmp,"Can't create mailbox %.80s: invalid MX-format name",mailbox);
- /* make sure valid name */
- for (s = mailbox; s && *s;) {
- if (isdigit (*s)) s++; /* digit, check this node further... */
- /* all digit node, barf */
- else if (*s == '/') s = NIL;
- /* non-digit in node, skip to next node */
- else if (s = strchr (s+1,'/')) s++;
- else tmp[0] = NIL; /* no more nodes, good name */
- }
- if (tmp[0]); /* was there an error in the name? */
- /* must not already exist */
- else if (mx_isvalid (mailbox,tmp))
- sprintf (tmp,"Can't create mailbox %.80s: mailbox already exists",mailbox);
- /* create directory */
- else if (!dummy_create_path (stream,strcat (mx_file (mbx,mailbox),"/")))
- sprintf (tmp,"Can't create mailbox leaf %.80s: %s",
- mailbox,strerror (errno));
- /* create index file */
- else if (((fd = open (MXINDEX (tmp,mailbox),O_WRONLY|O_CREAT|O_EXCL,
- (int) mail_parameters (NIL,GET_MBXPROTECTION,mailbox)))
- <0 ) || close (fd))
- sprintf (tmp,"Can't create mailbox index %.80s: %s",
- mailbox,strerror (errno));
- /* success */
- else return set_mbx_protections (mailbox,mbx) &&
- set_mbx_protections (mailbox,tmp);
- mm_log (tmp,ERROR); /* some error */
- return NIL;
- }
- /* MX mail delete mailbox
- * mailbox name to delete
- * Returns: T on success, NIL on failure
- */
- long mx_delete (MAILSTREAM *stream,char *mailbox)
- {
- DIR *dirp;
- struct direct *d;
- char *s;
- char tmp[MAILTMPLEN];
- if (!mx_isvalid (mailbox,tmp))
- sprintf (tmp,"Can't delete mailbox %.80s: no such mailbox",mailbox);
- /* delete index */
- else if (unlink (MXINDEX (tmp,mailbox)))
- sprintf (tmp,"Can't delete mailbox %.80s index: %s",
- mailbox,strerror (errno));
- else { /* get directory name */
- *(s = strrchr (tmp,'/')) = ' ';
- if (dirp = opendir (tmp)) { /* open directory */
- *s++ = '/'; /* restore delimiter */
- /* massacre messages */
- while (d = readdir (dirp)) if (mx_select (d)) {
- strcpy (s,d->d_name); /* make path */
- unlink (tmp); /* sayonara */
- }
- closedir (dirp); /* flush directory */
- }
- /* success if can remove the directory */
- if (!rmdir (mx_file (tmp,mailbox))) return T;
- sprintf (tmp,"Can't delete mailbox %.80s: %s",mailbox,strerror (errno));
- }
- mm_log (tmp,ERROR); /* something failed */
- return NIL;
- }
- /* MX mail rename mailbox
- * Accepts: MX mail stream
- * old mailbox name
- * new mailbox name
- * Returns: T on success, NIL on failure
- */
- long mx_rename (MAILSTREAM *stream,char *old,char *newname)
- {
- char c,*s,tmp[MAILTMPLEN],tmp1[MAILTMPLEN];
- struct stat sbuf;
- if (!mx_isvalid (old,tmp))
- sprintf (tmp,"Can't rename mailbox %.80s: no such mailbox",old);
- /* new mailbox name must not be valid */
- else if (mx_isvalid (newname,tmp))
- sprintf (tmp,"Can't rename to mailbox %.80s: destination already exists",
- newname);
- /* success if can rename the directory */
- else { /* found superior to destination name? */
- if (s = strrchr (mx_file (tmp1,newname),'/')) {
- c = *++s; /* remember first character of inferior */
- *s = ' '; /* tie off to get just superior */
- /* name doesn't exist, create it */
- if ((stat (tmp1,&sbuf) || ((sbuf.st_mode & S_IFMT) != S_IFDIR)) &&
- !dummy_create (stream,tmp1)) return NIL;
- *s = c; /* restore full name */
- }
- if (!rename (mx_file (tmp,old),tmp1)) {
- /* recreate file if renamed INBOX */
- if (!strcmp (ucase (strcpy (tmp,old)),"INBOX"))
- mx_create (NIL,"INBOX");
- return T;
- }
- sprintf (tmp,"Can't rename mailbox %.80s to %.80s: %s",
- old,newname,strerror (errno));
- }
- mm_log (tmp,ERROR); /* something failed */
- return NIL;
- }
- /* MX mail open
- * Accepts: stream to open
- * Returns: stream on success, NIL on failure
- */
- MAILSTREAM *mx_open (MAILSTREAM *stream)
- {
- char tmp[MAILTMPLEN];
- /* return prototype for OP_PROTOTYPE call */
- if (!stream) return user_flags (&mxproto);
- if (stream->local) fatal ("mx recycle stream");
- stream->local = fs_get (sizeof (MXLOCAL));
- /* note if an INBOX or not */
- stream->inbox = !strcmp (ucase (strcpy (tmp,stream->mailbox)),"INBOX");
- mx_file (tmp,stream->mailbox);/* get directory name */
- LOCAL->dir = cpystr (tmp); /* copy directory name for later */
- /* make temporary buffer */
- LOCAL->buf = (char *) fs_get ((LOCAL->buflen = MAXMESSAGESIZE) + 1);
- LOCAL->scantime = 0; /* not scanned yet */
- LOCAL->fd = -1; /* no index yet */
- LOCAL->cachedtexts = 0; /* no cached texts */
- stream->sequence++; /* bump sequence number */
- /* parse mailbox */
- stream->nmsgs = stream->recent = 0;
- if (mx_ping (stream) && !(stream->nmsgs || stream->silent))
- mm_log ("Mailbox is empty",(long) NIL);
- stream->perm_seen = stream->perm_deleted = stream->perm_flagged =
- stream->perm_answered = stream->perm_draft = stream->rdonly ? NIL : T;
- stream->perm_user_flags = stream->rdonly ? NIL : 0xffffffff;
- stream->kwd_create = (stream->user_flags[NUSERFLAGS-1] || stream->rdonly) ?
- NIL : T; /* can we create new user flags? */
- return stream; /* return stream to caller */
- }
- /* MX mail close
- * Accepts: MAIL stream
- * close options
- */
- void mx_close (MAILSTREAM *stream,long options)
- {
- if (LOCAL) { /* only if a file is open */
- int silent = stream->silent;
- stream->silent = T; /* note this stream is dying */
- if (options & CL_EXPUNGE) mx_expunge (stream);
- if (LOCAL->dir) fs_give ((void **) &LOCAL->dir);
- /* free local scratch buffer */
- if (LOCAL->buf) fs_give ((void **) &LOCAL->buf);
- /* nuke the local data */
- fs_give ((void **) &stream->local);
- stream->dtb = NIL; /* log out the DTB */
- stream->silent = silent; /* reset silent state */
- }
- }
- /* MX mail fetch fast information
- * Accepts: MAIL stream
- * sequence
- * option flags
- */
- void mx_fast (MAILSTREAM *stream,char *sequence,long flags)
- {
- unsigned long i;
- MESSAGECACHE *elt;
- if (stream && LOCAL &&
- ((flags & FT_UID) ? mail_uid_sequence (stream,sequence) :
- mail_sequence (stream,sequence)))
- for (i = 1; i <= stream->nmsgs; i++)
- if ((elt = mail_elt (stream,i))->sequence) mx_fast_work (stream,elt);
- }
- /* MX mail fetch fast information
- * Accepts: MAIL stream
- * message cache element
- * Returns: name of message file
- */
- char *mx_fast_work (MAILSTREAM *stream,MESSAGECACHE *elt)
- {
- struct stat sbuf;
- struct tm *tm;
- /* build message file name */
- sprintf (LOCAL->buf,"%s/%lu",LOCAL->dir,elt->private.uid);
- if (!elt->rfc822_size) { /* have size yet? */
- stat (LOCAL->buf,&sbuf); /* get size of message */
- /* make plausible IMAPish date string */
- tm = gmtime (&sbuf.st_mtime);
- elt->day = tm->tm_mday; elt->month = tm->tm_mon + 1;
- elt->year = tm->tm_year + 1900 - BASEYEAR;
- elt->hours = tm->tm_hour; elt->minutes = tm->tm_min;
- elt->seconds = tm->tm_sec;
- elt->zhours = 0; elt->zminutes = 0; elt->zoccident = 0;
- elt->rfc822_size = sbuf.st_size;
- }
- return LOCAL->buf; /* return file name */
- }
- /* MX mail fetch message header
- * Accepts: MAIL stream
- * message # to fetch
- * pointer to returned header text length
- * option flags
- * Returns: message header in RFC822 format
- */
- char *mx_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *length,
- long flags)
- {
- unsigned long i;
- int fd;
- MESSAGECACHE *elt;
- *length = 0; /* default to empty */
- if (flags & FT_UID) return "";/* UID call "impossible" */
- elt = mail_elt (stream,msgno);/* get elt */
- if (!elt->private.msg.header.text.data) {
- /* purge cache if too big */
- if (LOCAL->cachedtexts > max (stream->nmsgs * 4096,2097152)) {
- mail_gc (stream,GC_TEXTS);/* just can't keep that much */
- LOCAL->cachedtexts = 0;
- }
- if ((fd = open (mx_fast_work (stream,elt),O_RDONLY,NIL)) < 0) return "";
- /* is buffer big enough? */
- if (elt->rfc822_size > LOCAL->buflen) {
- fs_give ((void **) &LOCAL->buf);
- LOCAL->buf = (char *) fs_get ((LOCAL->buflen = elt->rfc822_size) + 1);
- }
- /* slurp message */
- read (fd,LOCAL->buf,elt->rfc822_size);
- /* tie off file */
- LOCAL->buf[elt->rfc822_size] = ' ';
- close (fd); /* flush message file */
- /* find end of header */
- if (elt->rfc822_size < 4) i = 0;
- else for (i = 4; (i < elt->rfc822_size) &&
- !((LOCAL->buf[i - 4] == ' 15') &&
- (LOCAL->buf[i - 3] == ' 12') &&
- (LOCAL->buf[i - 2] == ' 15') &&
- (LOCAL->buf[i - 1] == ' 12')); i++);
- /* copy header */
- cpytxt (&elt->private.msg.header.text,LOCAL->buf,i);
- cpytxt (&elt->private.msg.text.text,LOCAL->buf+i,elt->rfc822_size - i);
- /* add to cached size */
- LOCAL->cachedtexts += elt->rfc822_size;
- }
- *length = elt->private.msg.header.text.size;
- return (char *) elt->private.msg.header.text.data;
- }
- /* MX mail fetch message text (body only)
- * Accepts: MAIL stream
- * message # to fetch
- * pointer to returned stringstruct
- * option flags
- * Returns: T on success, NIL on failure
- */
- long mx_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags)
- {
- unsigned long i;
- MESSAGECACHE *elt;
- /* UID call "impossible" */
- if (flags & FT_UID) return NIL;
- elt = mail_elt (stream,msgno);
- /* snarf message if don't have it yet */
- if (!elt->private.msg.text.text.data) {
- mx_header (stream,msgno,&i,flags);
- if (!elt->private.msg.text.text.data) return NIL;
- }
- /* mark as seen */
- if (!(flags & FT_PEEK) && mx_lockindex (stream)) {
- elt->seen = T;
- mx_unlockindex (stream);
- mm_flags (stream,msgno);
- }
- INIT (bs,mail_string,elt->private.msg.text.text.data,
- elt->private.msg.text.text.size);
- return T;
- }
- /* MX mail modify flags
- * Accepts: MAIL stream
- * sequence
- * flag(s)
- * option flags
- */
- void mx_flag (MAILSTREAM *stream,char *sequence,char *flag,long flags)
- {
- mx_unlockindex (stream); /* finished with index */
- }
- /* MX per-message modify flags
- * Accepts: MAIL stream
- * message cache element
- */
- void mx_flagmsg (MAILSTREAM *stream,MESSAGECACHE *elt)
- {
- mx_lockindex (stream); /* lock index if not already locked */
- }
- /* MX mail ping mailbox
- * Accepts: MAIL stream
- * Returns: T if stream alive, else NIL
- */
- long mx_ping (MAILSTREAM *stream)
- {
- MAILSTREAM *sysibx = NIL;
- MESSAGECACHE *elt,*selt;
- struct stat sbuf;
- char *s,tmp[MAILTMPLEN];
- int fd;
- unsigned long i,j,r,old;
- long nmsgs = stream->nmsgs;
- long recent = stream->recent;
- int silent = stream->silent;
- if (stat (LOCAL->dir,&sbuf)) return NIL;
- stream->silent = T; /* don't pass up mm_exists() events yet */
- if (sbuf.st_ctime != LOCAL->scantime) {
- struct direct **names = NIL;
- long nfiles = scandir (LOCAL->dir,&names,mx_select,mx_numsort);
- if (nfiles < 0) nfiles = 0; /* in case error */
- old = stream->uid_last;
- /* note scanned now */
- LOCAL->scantime = sbuf.st_ctime;
- /* scan directory */
- for (i = 0; i < nfiles; ++i) {
- /* if newly seen, add to list */
- if ((j = atoi (names[i]->d_name)) > old) {
- /* swell the cache */
- mail_exists (stream,++nmsgs);
- stream->uid_last = (elt = mail_elt (stream,nmsgs))->private.uid = j;
- elt->valid = T; /* note valid flags */
- if (old) { /* other than the first pass? */
- elt->recent = T; /* yup, mark as recent */
- recent++; /* bump recent count */
- }
- }
- fs_give ((void **) &names[i]);
- }
- /* free directory */
- if (s = (void *) names) fs_give ((void **) &s);
- }
- stream->nmsgs = nmsgs; /* don't upset mail_uid() */
- /* if INBOX, snarf from system INBOX */
- if (mx_lockindex (stream) && stream->inbox) {
- old = stream->uid_last;
- /* paranoia check */
- if (!strcmp (sysinbox (),stream->mailbox)) {
- stream->silent = silent;
- return NIL;
- }
- mm_critical (stream); /* go critical */
- stat (sysinbox (),&sbuf); /* see if anything there */
- /* can get sysinbox mailbox? */
- if (sbuf.st_size && (sysibx = mail_open (sysibx,sysinbox (),OP_SILENT))
- && (!sysibx->rdonly) && (r = sysibx->nmsgs)) {
- for (i = 1; i <= r; ++i) {/* for each message in sysinbox mailbox */
- /* build file name we will use */
- sprintf (LOCAL->buf,"%s/%lu",LOCAL->dir,++old);
- /* snarf message from Berkeley mailbox */
- selt = mail_elt (sysibx,i);
- if (((fd = open (LOCAL->buf,O_WRONLY|O_CREAT|O_EXCL,
- S_IREAD|S_IWRITE)) >= 0) &&
- (s = mail_fetchheader_full (sysibx,i,NIL,&j,FT_PEEK)) &&
- (write (fd,s,j) == j) &&
- (s = mail_fetchtext_full (sysibx,i,&j,FT_PEEK)) &&
- (write (fd,s,j) == j) && !fsync (fd) && !close (fd)) {
- /* swell the cache */
- mail_exists (stream,++nmsgs);
- stream->uid_last = /* create new elt, note its file number */
- (elt = mail_elt (stream,nmsgs))->private.uid = old;
- recent++; /* bump recent count */
- /* set up initial flags and date */
- elt->valid = elt->recent = T;
- elt->seen = selt->seen;
- elt->deleted = selt->deleted;
- elt->flagged = selt->flagged;
- elt->answered = selt->answered;
- elt->draft = selt->draft;
- elt->day = selt->day;elt->month = selt->month;elt->year = selt->year;
- elt->hours = selt->hours;elt->minutes = selt->minutes;
- elt->seconds = selt->seconds;
- elt->zhours = selt->zhours; elt->zminutes = selt->zminutes;
- elt->zoccident = selt->zoccident;
- mx_setdate (LOCAL->buf,elt);
- }
- else { /* failed to snarf */
- if (fd) { /* did it ever get opened? */
- close (fd); /* close descriptor */
- unlink (LOCAL->buf);/* flush this file */
- }
- stream->silent = silent;
- return NIL; /* note that something is badly wrong */
- }
- sprintf (tmp,"%lu",i); /* delete it from the sysinbox */
- mail_flag (sysibx,tmp,"\Deleted",ST_SET);
- }
- stat (LOCAL->dir,&sbuf); /* update scan time */
- LOCAL->scantime = sbuf.st_ctime;
- mail_expunge (sysibx); /* now expunge all those messages */
- }
- if (sysibx) mail_close (sysibx);
- mm_nocritical (stream); /* release critical */
- }
- mx_unlockindex (stream); /* done with index */
- stream->silent = silent; /* can pass up events now */
- mail_exists (stream,nmsgs); /* notify upper level of mailbox size */
- mail_recent (stream,recent);
- return T; /* return that we are alive */
- }
- /* MX mail check mailbox
- * Accepts: MAIL stream
- */
- void mx_check (MAILSTREAM *stream)
- {
- if (mx_ping (stream)) mm_log ("Check completed",(long) NIL);
- }
- /* MX mail expunge mailbox
- * Accepts: MAIL stream
- */
- void mx_expunge (MAILSTREAM *stream)
- {
- MESSAGECACHE *elt;
- unsigned long i = 1;
- unsigned long n = 0;
- unsigned long recent = stream->recent;
- if (mx_lockindex (stream)) { /* lock the index */
- mm_critical (stream); /* go critical */
- while (i <= stream->nmsgs) {/* for each message */
- /* if deleted, need to trash it */
- if ((elt = mail_elt (stream,i))->deleted) {
- sprintf (LOCAL->buf,"%s/%lu",LOCAL->dir,elt->private.uid);
- if (unlink (LOCAL->buf)) {/* try to delete the message */
- sprintf (LOCAL->buf,"Expunge of message %lu failed, aborted: %s",i,
- strerror (errno));
- mm_log (LOCAL->buf,(long) NIL);
- break;
- }
- /* note uncached */
- LOCAL->cachedtexts -= ((elt->private.msg.header.text.data ?
- elt->private.msg.header.text.size : 0) +
- (elt->private.msg.text.text.data ?
- elt->private.msg.text.text.size : 0));
- mail_gc_msg (&elt->private.msg,GC_ENV | GC_TEXTS);
- if(elt->recent)--recent;/* if recent, note one less recent message */
- mail_expunged(stream,i);/* notify upper levels */
- n++; /* count up one more expunged message */
- }
- else i++; /* otherwise try next message */
- }
- if (n) { /* output the news if any expunged */
- sprintf (LOCAL->buf,"Expunged %lu messages",n);
- mm_log (LOCAL->buf,(long) NIL);
- }
- else mm_log ("No messages deleted, so no update needed",(long) NIL);
- mm_nocritical (stream); /* release critical */
- mx_unlockindex (stream); /* finished with index */
- }
- /* notify upper level of new mailbox size */
- mail_exists (stream,stream->nmsgs);
- mail_recent (stream,recent);
- }
- /* MX mail copy message(s)
- * Accepts: MAIL stream
- * sequence
- * destination mailbox
- * copy options
- * Returns: T if copy successful, else NIL
- */
- long mx_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options)
- {
- STRING st;
- MESSAGECACHE *elt;
- struct stat sbuf;
- int fd;
- unsigned long i,j;
- char *t,flags[MAILTMPLEN],date[MAILTMPLEN];
- /* copy the messages */
- if ((options & CP_UID) ? mail_uid_sequence (stream,sequence) :
- mail_sequence (stream,sequence))
- for (i = 1; i <= stream->nmsgs; i++)
- if ((elt = mail_elt (stream,i))->sequence) {
- if ((fd = open (mx_fast_work (stream,elt),O_RDONLY,NIL))<0) return NIL;
- fstat (fd,&sbuf); /* get size of message */
- /* is buffer big enough? */
- if (sbuf.st_size > LOCAL->buflen) {
- fs_give ((void **) &LOCAL->buf);
- LOCAL->buf = (char *) fs_get ((LOCAL->buflen = sbuf.st_size) + 1);
- }
- /* slurp message */
- read (fd,LOCAL->buf,sbuf.st_size);
- /* tie off file */
- LOCAL->buf[sbuf.st_size] = ' ';
- close (fd); /* flush message file */
- INIT (&st,mail_string,(void *) LOCAL->buf,sbuf.st_size);
- /* init flag string */
- flags[0] = flags[1] = ' ';
- if (j = elt->user_flags) do
- if (t = stream->user_flags[find_rightmost_bit (&j)])
- strcat (strcat (flags," "),t);
- while (j);
- if (elt->seen) strcat (flags," \Seen");
- if (elt->deleted) strcat (flags," \Deleted");
- if (elt->flagged) strcat (flags," \Flagged");
- if (elt->answered) strcat (flags," \Answered");
- if (elt->draft) strcat (flags," \Draft");
- flags[0] = '('; /* open list */
- strcat (flags,")"); /* close list */
- mail_date (date,elt); /* generate internal date */
- if (!mail_append_full (NIL,mailbox,flags,date,&st)) return NIL;
- if (options & CP_MOVE) elt->deleted = T;
- }
- return T; /* return success */
- }
- /* MX mail append message from stringstruct
- * Accepts: MAIL stream
- * destination mailbox
- * stringstruct of messages to append
- * Returns: T if append successful, else NIL
- */
- long mx_append (MAILSTREAM *stream,char *mailbox,char *flags,char *date,
- STRING *message)
- {
- MESSAGECACHE *elt,selt;
- MAILSTREAM *astream;
- int fd;
- char *s,tmp[MAILTMPLEN];
- long f;
- long i = 0;
- long size = SIZE (message);
- long ret = LONGT;
- unsigned long uf;
- if (date) { /* want to preserve date? */
- /* yes, parse date into an elt */
- if (!mail_parse_date (&selt,date)) {
- sprintf (tmp,"Bad date in append: %.80s",date);
- mm_log (tmp,ERROR);
- return NIL;
- }
- }
- /* N.B.: can't use LOCAL->buf for tmp */
- /* make sure valid mailbox */
- if (!mx_isvalid (mailbox,tmp)) switch (errno) {
- case ENOENT: /* no such file? */
- if (((mailbox[0] == 'I') || (mailbox[0] == 'i')) &&
- ((mailbox[1] == 'N') || (mailbox[1] == 'n')) &&
- ((mailbox[2] == 'B') || (mailbox[2] == 'b')) &&
- ((mailbox[3] == 'O') || (mailbox[3] == 'o')) &&
- ((mailbox[4] == 'X') || (mailbox[4] == 'x')) && !mailbox[5])
- mx_create (NIL,"INBOX");
- else {
- mm_notify (stream,"[TRYCREATE] Must create mailbox before append",NIL);
- return NIL;
- }
- /* falls through */
- case 0: /* merely empty file? */
- break;
- case EINVAL:
- sprintf (tmp,"Invalid MX-format mailbox name: %.80s",mailbox);
- mm_log (tmp,ERROR);
- return NIL;
- default:
- sprintf (tmp,"Not a MX-format mailbox: %.80s",mailbox);
- mm_log (tmp,ERROR);
- return NIL;
- }
- if (!(astream = mail_open (NIL,mailbox,OP_SILENT))) {
- sprintf (tmp,"Can't open append mailbox: %s",strerror (errno));
- mm_log (tmp,ERROR);
- return NIL;
- }
- /* parse flags */
- f = mail_parse_flags (astream,flags,&uf);
- if (mx_lockindex (astream)) { /* lock the index */
- mx_file (tmp,mailbox); /* make message name */
- sprintf (tmp + strlen (tmp),"/%lu",++astream->uid_last);
- if ((fd = open (tmp,O_WRONLY|O_CREAT|O_EXCL,S_IREAD|S_IWRITE)) < 0) {
- sprintf (tmp,"Can't create append message: %s",strerror (errno));
- mm_log (tmp,ERROR);
- return NIL;
- }
- s = (char *) fs_get (size); /* copy message */
- for (i = 0; i < size; s[i++] = SNX (message));
- mm_critical (stream); /* go critical */
- /* write the data */
- if ((write (fd,s,size) < 0) || fsync (fd)) {
- unlink (tmp); /* delete mailbox */
- sprintf (tmp,"Message append failed: %s",strerror (errno));
- mm_log (tmp,ERROR);
- ret = NIL;
- }
- close (fd); /* close the file */
- /* set the date for this message */
- if (date) mx_setdate (tmp,&selt);
- /* swell the cache */
- mail_exists (astream,++astream->nmsgs);
- /* copy flags */
- (elt = mail_elt (astream,astream->nmsgs))->private.uid = astream->uid_last;
- if (f&fSEEN) elt->seen = T;
- if (f&fDELETED) elt->deleted = T;
- if (f&fFLAGGED) elt->flagged = T;
- if (f&fANSWERED) elt->answered = T;
- if (f&fDRAFT) elt->draft = T;
- elt->user_flags |= uf;
- mx_unlockindex (astream); /* unlock index */
- }
- else {
- mm_log ("Message append failed: unable to lock index",ERROR);
- ret = NIL;
- }
- mm_nocritical (stream); /* release critical */
- fs_give ((void **) &s); /* flush the buffer */
- mail_close (astream);
- return ret;
- }
- /* Internal routines */
- /* MX file name selection test
- * Accepts: candidate directory entry
- * Returns: T to use file name, NIL to skip it
- */
- int mx_select (struct direct *name)
- {
- char c;
- char *s = name->d_name;
- while (c = *s++) if (!isdigit (c)) return NIL;
- return T;
- }
- /* MX file name comparision
- * Accepts: first candidate directory entry
- * second candidate directory entry
- * Returns: negative if d1 < d2, 0 if d1 == d2, postive if d1 > d2
- */
- int mx_numsort (const void *d1,const void *d2)
- {
- return atoi ((*(struct direct **) d1)->d_name) -
- atoi ((*(struct direct **) d2)->d_name);
- }
- /* MX mail build file name
- * Accepts: destination string
- * source
- * Returns: destination
- */
- char *mx_file (char *dst,char *name)
- {
- char *s;
- if (!(mailboxfile (dst,name) && *dst)) sprintf (dst,"%s/INBOX",myhomedir ());
- /* tie off unnecessary trailing / */
- else if ((s = strrchr (dst,'/')) && !s[1]) *s = ' ';
- return dst;
- }
- /* MX read and lock index
- * Accepts: MAIL stream
- * Returns: T if success, NIL if failure
- */
- long mx_lockindex (MAILSTREAM *stream)
- {
- unsigned long uf,sf,uid;
- int k = 0;
- unsigned long msgno = 1;
- struct stat sbuf;
- char *s,*t,*idx,tmp[MAILTMPLEN];
- MESSAGECACHE *elt;
- blocknotify_t bn = (blocknotify_t) mail_parameters (NIL,GET_BLOCKNOTIFY,NIL);
- if ((LOCAL->fd < 0) && /* get index file, no-op if already have it */
- (LOCAL->fd = open (strcat (strcpy (tmp,LOCAL->dir),MXINDEXNAME),
- O_RDWR|O_CREAT,S_IREAD|S_IWRITE)) >= 0) {
- (*bn) (BLOCK_FILELOCK,NIL);
- flock (LOCAL->fd,LOCK_EX); /* get exclusive lock */
- (*bn) (BLOCK_NONE,NIL);
- fstat (LOCAL->fd,&sbuf); /* get size of index */
- /* slurp index */
- read (LOCAL->fd,s = idx = (char *) fs_get (sbuf.st_size + 1),sbuf.st_size);
- idx[sbuf.st_size] = ' '; /* tie off index */
- /* parse index */
- if (sbuf.st_size) while (s && *s) switch (*s) {
- case 'V': /* UID validity record */
- stream->uid_validity = strtoul (s+1,&s,16);
- break;
- case 'L': /* UID last record */
- stream->uid_last = strtoul (s+1,&s,16);
- break;
- case 'K': /* keyword */
- /* find end of keyword */
- if (s = strchr (t = ++s,'n')) {
- *s++ = ' '; /* tie off keyword */
- /* copy keyword */
- if ((k < NUSERFLAGS) && !stream->user_flags[k])
- stream->user_flags[k] = cpystr (t);
- k++; /* one more keyword */
- }
- break;
- case 'M': /* message status record */
- uid = strtoul (s+1,&s,16);/* get UID for this message */
- if (*s == ';') { /* get user flags */
- uf = strtoul (s+1,&s,16);
- if (*s == '.') { /* get system flags */
- sf = strtoul (s+1,&s,16);
- while ((msgno <= stream->nmsgs) && (mail_uid (stream,msgno) < uid))
- msgno++; /* find message number for this UID */
- if ((msgno <= stream->nmsgs) && (mail_uid (stream,msgno) == uid)) {
- (elt = mail_elt (stream,msgno))->valid = T;
- elt->user_flags=uf; /* set user and system flags in elt */
- if (sf & fSEEN) elt->seen = T;
- if (sf & fDELETED) elt->deleted = T;
- if (sf & fFLAGGED) elt->flagged = T;
- if (sf & fANSWERED) elt->answered = T;
- if (sf & fDRAFT) elt->draft = T;
- }
- break;
- }
- }
- default: /* bad news */
- sprintf (tmp,"Error in index: %.80s",s);
- mm_log (tmp,ERROR);
- *s = NIL; /* ignore remainder of index */
- }
- else { /* new index */
- stream->uid_validity = time (0);
- user_flags (stream); /* init stream with default user flags */
- }
- fs_give ((void **) &idx); /* flush index */
- }
- return (LOCAL->fd >= 0) ? T : NIL;
- }
- /* MX write and unlock index
- * Accepts: MAIL stream
- */
- void mx_unlockindex (MAILSTREAM *stream)
- {
- unsigned long i,j;
- off_t size = 0;
- char *s,tmp[MAILTMPLEN + 64];
- MESSAGECACHE *elt;
- if (LOCAL->fd >= 0) {
- lseek (LOCAL->fd,0,L_SET); /* rewind file */
- /* write header */
- sprintf (s = tmp,"V%08lxL%08lx",stream->uid_validity,stream->uid_last);
- for (i = 0; (i < NUSERFLAGS) && stream->user_flags[i]; ++i)
- sprintf (s += strlen (s),"K%sn",stream->user_flags[i]);
- /* write messages */
- for (i = 1; i <= stream->nmsgs; i++) {
- /* filled buffer? */
- if (((s += strlen (s)) - tmp) > MAILTMPLEN) {
- write (LOCAL->fd,tmp,j = s - tmp);
- size += j;
- *(s = tmp) = ' '; /* dump out and restart buffer */
- }
- elt = mail_elt (stream,i);
- sprintf(s,"M%08lx;%08lx.%04x",elt->private.uid,elt->user_flags,(unsigned)
- ((fSEEN * elt->seen) + (fDELETED * elt->deleted) +
- (fFLAGGED * elt->flagged) + (fANSWERED * elt->answered) +
- (fDRAFT * elt->draft)));
- }
- /* write tail end of buffer */
- if ((s += strlen (s)) != tmp) {
- write (LOCAL->fd,tmp,j = s - tmp);
- size += j;
- }
- ftruncate (LOCAL->fd,size);
- flock (LOCAL->fd,LOCK_UN); /* unlock the index */
- close (LOCAL->fd); /* finished with file */
- LOCAL->fd = -1; /* no index now */
- }
- }
- /* Set date for message
- * Accepts: file name
- * elt containing date
- */
- void mx_setdate (char *file,MESSAGECACHE *elt)
- {
- time_t tp[2];
- tp[0] = time (0); /* atime is now */
- tp[1] = mail_longdate (elt); /* modification time */
- utime (file,tp); /* set the times */
- }