www.pudn.com > sip-1[1].5.0.part02.rar > mh.c
/* * Program: MH 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: 23 February 1992 * Last Edited: 28 August 2000 * * Copyright 2000 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#include #include extern int errno; /* just in case */ #include "mail.h" #include "osdep.h" #include #include #include #include "mh.h" #include "misc.h" #include "dummy.h" /* MH mail routines */ /* Driver dispatch used by MAIL */ DRIVER mhdriver = { "mh", /* driver name */ /* driver flags */ DR_MAIL|DR_LOCAL|DR_NOFAST|DR_NAMESPACE|DR_NOSTICKY, (DRIVER *) NIL, /* next driver */ mh_valid, /* mailbox is valid for us */ mh_parameters, /* manipulate parameters */ mh_scan, /* scan mailboxes */ mh_list, /* find mailboxes */ mh_lsub, /* find subscribed mailboxes */ mh_subscribe, /* subscribe to mailbox */ mh_unsubscribe, /* unsubscribe from mailbox */ mh_create, /* create mailbox */ mh_delete, /* delete mailbox */ mh_rename, /* rename mailbox */ NIL, /* status of mailbox */ mh_open, /* open mailbox */ mh_close, /* close mailbox */ mh_fast, /* fetch message "fast" attributes */ NIL, /* fetch message flags */ NIL, /* fetch overview */ NIL, /* fetch message envelopes */ mh_header, /* fetch message header */ mh_text, /* fetch message body */ NIL, /* fetch partial message text */ NIL, /* unique identifier */ NIL, /* message number */ NIL, /* modify flags */ NIL, /* per-message modify flags */ NIL, /* search for message based on criteria */ NIL, /* sort messages */ NIL, /* thread messages */ mh_ping, /* ping mailbox to see if still alive */ mh_check, /* check for new messages */ mh_expunge, /* expunge deleted messages */ mh_copy, /* copy messages to another mailbox */ mh_append, /* append string message to mailbox */ NIL /* garbage collect stream */ }; /* prototype stream */ MAILSTREAM mhproto = {&mhdriver}; /* MH mail validate mailbox * Accepts: mailbox name * Returns: our driver if name is valid, NIL otherwise */ DRIVER *mh_valid (char *name) { char tmp[MAILTMPLEN]; return mh_isvalid (name,tmp,T) ? &mhdriver : NIL; } /* MH mail test for valid mailbox * Accepts: mailbox name * temporary buffer to use * syntax only test flag * Returns: T if valid, NIL otherwise */ static char *mh_profile = NIL; /* holds MH profile */ static char *mh_path = NIL; /* holds MH path name */ static long mh_once = 0; /* already through this code */ int mh_isvalid (char *name,char *tmp,long synonly) { struct stat sbuf; /* name must be #MHINBOX or #mh/... */ if (strcmp (ucase (strcpy (tmp,name)),"#MHINBOX") && !(tmp[0] == '#' && tmp[1] == 'M' && tmp[2] == 'H' && tmp[3] == '/')) { errno = EINVAL; /* bogus name */ return NIL; } if (!mh_path) { /* have MH path yet? */ char *s,*t,*v; int fd; if (mh_once++) return NIL; /* only do this code once */ if (!mh_profile) { /* have MH profile? */ sprintf (tmp,"%s/%s",myhomedir (),MHPROFILE); mh_profile = cpystr (tmp); } if ((fd = open (tmp,O_RDONLY,NIL)) < 0) { strcat (tmp," not found, mh format names disabled"); mm_log (tmp,WARN); return NIL; } fstat (fd,&sbuf); /* yes, get size and read file */ read (fd,(t = (char *) fs_get (sbuf.st_size + 1)),sbuf.st_size); close (fd); /* don't need the file any more */ t[sbuf.st_size] = '\0'; /* tie it off */ /* parse profile file */ for (s = strtok (t,"\r\n"); s && *s; s = strtok (NIL,"\r\n")) { /* found space in line? */ if (v = strpbrk (s," \t")) { *v++ = '\0'; /* tie off, is keyword "Path:"? */ if (!strcmp (lcase (s),"path:")) { /* skip whitespace */ while ((*v == ' ') || (*v == '\t')) ++v; if (*v == '/') s = v; /* absolute path? */ else sprintf (s = tmp,"%s/%s",myhomedir (),v); mh_path = cpystr (s); /* copy name */ break; /* don't need to look at rest of file */ } } } fs_give ((void **) &t); /* flush profile text */ if (!mh_path) { /* default path if not in the profile */ sprintf (tmp,"%s/%s",myhomedir (),MHPATH); mh_path = cpystr (tmp); } } if (synonly) return T; /* all done if syntax only check */ errno = NIL; /* zap error */ /* validate name as directory */ return ((stat (mh_file (tmp,name),&sbuf) == 0) && (sbuf.st_mode & S_IFMT) == S_IFDIR); } /* MH manipulate driver parameters * Accepts: function code * function-dependent value * Returns: function-dependent return value */ void *mh_parameters (long function,void *value) { void *ret = NIL; switch ((int) function) { case SET_MHPROFILE: if (mh_profile) fs_give ((void **) &mh_profile); mh_profile = cpystr ((char *) value); case GET_MHPROFILE: ret = (void *) mh_profile; break; case SET_MHPATH: if (mh_path) fs_give ((void **) &mh_path); mh_path = cpystr ((char *) value); case GET_MHPATH: ret = (void *) mh_path; break; } return ret; } /* MH scan mailboxes * Accepts: mail stream * reference * pattern to search * string to scan */ void mh_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents) { char tmp[MAILTMPLEN]; if (mh_canonicalize (tmp,ref,pat)) mm_log ("Scan not valid for mh mailboxes",ERROR); } /* MH list mailboxes * Accepts: mail stream * reference * pattern to search */ void mh_list (MAILSTREAM *stream,char *ref,char *pat) { char *s,test[MAILTMPLEN],file[MAILTMPLEN]; long i = 0; if (!pat || !*pat) { /* empty pattern? */ if (mh_canonicalize (test,ref,"*")) { /* tie off name at root */ if (s = strchr (test,'/')) *++s = '\0'; else test[0] = '\0'; mm_list (stream,'/',test,LATT_NOSELECT); } } /* get canonical form of name */ else if (mh_canonicalize (test,ref,pat)) { if (test[3] == '/') { /* looking down levels? */ /* yes, found any wildcards? */ if (s = strpbrk (test,"%*")) { /* yes, copy name up to that point */ strncpy (file,test+4,i = s - (test+4)); file[i] = '\0'; /* tie off */ } else strcpy (file,test+4);/* use just that name then */ /* find directory name */ if (s = strrchr (file,'/')) { *s = '\0'; /* found, tie off at that point */ s = file; } /* do the work */ mh_list_work (stream,s,test,0); } /* always an INBOX */ if (pmatch ("#MHINBOX",ucase (test))) mm_list (stream,NIL,"#MHINBOX",LATT_NOINFERIORS); } } /* MH list subscribed mailboxes * Accepts: mail stream * reference * pattern to search */ void mh_lsub (MAILSTREAM *stream,char *ref,char *pat) { void *sdb = NIL; char *s,test[MAILTMPLEN]; /* get canonical form of name */ if (mh_canonicalize (test,ref,pat) && (s = sm_read (&sdb))) { do if (pmatch_full (s,test,'/')) mm_lsub (stream,'/',s,NIL); while (s = sm_read (&sdb)); /* until no more subscriptions */ } } /* MH list mailboxes worker routine * Accepts: mail stream * directory name to search * search pattern * search level */ void mh_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]; /* build MH name to search */ if (dir) sprintf (name,"#mh/%s/",dir); else strcpy (name,"#mh/"); /* make directory name, punt if bogus */ if (!mh_file (curdir,name)) return; cp = curdir + strlen (curdir);/* end of directory name */ np = name + strlen (name); /* end of MH name */ if (dp = opendir (curdir)) { /* open directory */ while (d = readdir (dp)) /* scan, ignore . and numeric names */ if ((d->d_name[0] != '.') && !mh_select (d)) { strcpy (cp,d->d_name); /* make directory name */ if (!stat (curdir,&sbuf) && ((sbuf.st_mode & S_IFMT) == S_IFDIR)) { strcpy (np,d->d_name);/* make mh name of directory name */ /* yes, an MH name if full match */ if (pmatch_full (name,pat,'/')) mm_list (stream,'/',name,NIL); /* check if should recurse */ if (dmatch (name,pat,'/') && (level < (long) mail_parameters (NIL,GET_LISTMAXLEVEL,NIL))) mh_list_work (stream,name+4,pat,level+1); } } closedir (dp); /* all done, flush directory */ } } /* MH mail subscribe to mailbox * Accepts: mail stream * mailbox to add to subscription list * Returns: T on success, NIL on failure */ long mh_subscribe (MAILSTREAM *stream,char *mailbox) { return sm_subscribe (mailbox); } /* MH mail unsubscribe to mailbox * Accepts: mail stream * mailbox to delete from subscription list * Returns: T on success, NIL on failure */ long mh_unsubscribe (MAILSTREAM *stream,char *mailbox) { return sm_unsubscribe (mailbox); } /* MH mail create mailbox * Accepts: mail stream * mailbox name to create * Returns: T on success, NIL on failure */ long mh_create (MAILSTREAM *stream,char *mailbox) { char *s,tmp[MAILTMPLEN]; /* assume error */ sprintf (tmp,"Can't create mailbox %.80s: invalid MH-format name",mailbox); if (mailbox[0] == '#' && (mailbox[1] == 'm' || mailbox[1] == 'M') && (mailbox[2] == 'h' || mailbox[2] == 'H') && mailbox[3] == '/') /* make sure valid name */ for (s = mailbox + 4; 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? */ mm_log (tmp,ERROR); /* yes, log it */ return NIL; } /* must not already exist */ if (mh_isvalid (mailbox,tmp,NIL)) { sprintf (tmp,"Can't create mailbox %.80s: mailbox already exists",mailbox); mm_log (tmp,ERROR); return NIL; } if (!mh_path) return NIL; /* sorry */ /* try to make it */ if (!(mh_file (tmp,mailbox) && dummy_create_path (stream,strcat (tmp,"/")))){ sprintf (tmp,"Can't create mailbox %.80s: %s",mailbox,strerror (errno)); mm_log (tmp,ERROR); return NIL; } return T; /* return success */ } /* MH mail delete mailbox * mailbox name to delete * Returns: T on success, NIL on failure */ long mh_delete (MAILSTREAM *stream,char *mailbox) { DIR *dirp; struct direct *d; int i; char tmp[MAILTMPLEN]; if (!(mailbox[0] == '#' && (mailbox[1] == 'm' || mailbox[1] == 'M') && (mailbox[2] == 'h' || mailbox[2] == 'H') && mailbox[3] == '/')) { sprintf (tmp,"Can't delete mailbox %.80s: invalid MH-format name",mailbox); mm_log (tmp,ERROR); return NIL; } /* is mailbox valid? */ if (!mh_isvalid (mailbox,tmp,NIL)){ sprintf (tmp,"Can't delete mailbox %.80s: no such mailbox",mailbox); mm_log (tmp,ERROR); return NIL; } /* get name of directory */ i = strlen (mh_file (tmp,mailbox)); if (dirp = opendir (tmp)) { /* open directory */ tmp[i++] = '/'; /* now apply trailing delimiter */ while (d = readdir (dirp)) /* massacre all numeric or comma files */ if (mh_select (d) || (*d->d_name == ',') || !strcmp (d->d_name,MHSEQUENCE)) { strcpy (tmp + i,d->d_name); unlink (tmp); /* sayonara */ } closedir (dirp); /* flush directory */ } /* try to remove the directory */ if (rmdir (mh_file (tmp,mailbox))) { sprintf (tmp,"Can't delete mailbox %.80s: %s",mailbox,strerror (errno)); mm_log (tmp,ERROR); return NIL; } return T; /* return success */ } /* MH mail rename mailbox * Accepts: MH mail stream * old mailbox name * new mailbox name * Returns: T on success, NIL on failure */ long mh_rename (MAILSTREAM *stream,char *old,char *newname) { char c,*s,tmp[MAILTMPLEN],tmp1[MAILTMPLEN]; struct stat sbuf; if (!(old[0] == '#' && (old[1] == 'm' || old[1] == 'M') && (old[2] == 'h' || old[2] == 'H') && old[3] == '/')) sprintf (tmp,"Can't delete mailbox %.80s: invalid MH-format name",old); /* old mailbox name must be valid */ else if (!mh_isvalid (old,tmp,NIL)) sprintf (tmp,"Can't rename mailbox %.80s: no such mailbox",old); else if (!(newname[0] == '#' && (newname[1] == 'm' || newname[1] == 'M') && (newname[2] == 'h' || newname[2] == 'H') && newname[3] == '/')) sprintf (tmp,"Can't rename to mailbox %.80s: invalid MH-format name", newname); /* new mailbox name must not be valid */ else if (mh_isvalid (newname,tmp,NIL)) 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 (mh_file (tmp1,newname),'/')) { c = *++s; /* remember first character of inferior */ *s = '\0'; /* 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 (mh_file (tmp,old),tmp1)) return T; sprintf (tmp,"Can't rename mailbox %.80s to %.80s: %s", old,newname,strerror (errno)); } mm_log (tmp,ERROR); /* something failed */ return NIL; } /* MH mail open * Accepts: stream to open * Returns: stream on success, NIL on failure */ MAILSTREAM *mh_open (MAILSTREAM *stream) { char tmp[MAILTMPLEN]; if (!stream) return &mhproto; /* return prototype for OP_PROTOTYPE call */ if (stream->local) fatal ("mh recycle stream"); stream->local = fs_get (sizeof (MHLOCAL)); /* note if an INBOX or not */ stream->inbox = !strcmp (ucase (strcpy (tmp,stream->mailbox)),"#MHINBOX"); mh_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->cachedtexts = 0; /* no cached texts */ stream->sequence++; /* bump sequence number */ /* parse mailbox */ stream->nmsgs = stream->recent = 0; if (!mh_ping (stream)) return NIL; if (!(stream->nmsgs || stream->silent)) mm_log ("Mailbox is empty",(long) NIL); return stream; /* return stream to caller */ } /* MH mail close * Accepts: MAIL stream * close options */ void mh_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) mh_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 */ } } /* MH mail fetch fast information * Accepts: MAIL stream * sequence * option flags */ void mh_fast (MAILSTREAM *stream,char *sequence,long flags) { unsigned long i,j; /* ugly and slow */ if (stream && LOCAL && ((flags & FT_UID) ? mail_uid_sequence (stream,sequence) : mail_sequence (stream,sequence))) for (i = 1; i <= stream->nmsgs; i++) if (mail_elt (stream,i)->sequence) mh_header (stream,i,&j,NIL); } /* MH 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 *mh_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *length, long flags) { unsigned long i,hdrsize; int fd; char *t; struct stat sbuf; struct tm *tm; 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; } /* build message file name */ sprintf (LOCAL->buf,"%s/%lu",LOCAL->dir,elt->private.uid); if ((fd = open (LOCAL->buf,O_RDONLY,NIL)) < 0) return ""; fstat (fd,&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; /* 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] = '\0'; close (fd); /* flush message file */ /* find end of header */ for (i = 0,t = LOCAL->buf; *t && !(i && (*t == '\n')); i = (*t++ == '\n')); /* number of header bytes */ hdrsize = (*t ? ++t : t) - LOCAL->buf; elt->rfc822_size = /* size of entire message in CRLF form */ (elt->private.msg.header.text.size = strcrlfcpy ((char **) &elt->private.msg.header.text.data,&i,LOCAL->buf, hdrsize)) + (elt->private.msg.text.text.size = strcrlfcpy ((char **) &elt->private.msg.text.text.data,&i,t, sbuf.st_size - hdrsize)); /* add to cached size */ LOCAL->cachedtexts += elt->rfc822_size; } *length = elt->private.msg.header.text.size; return (char *) elt->private.msg.header.text.data; } /* MH 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 mh_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);/* get elt */ /* snarf message if don't have it yet */ if (!elt->private.msg.text.text.data) { mh_header (stream,msgno,&i,flags); if (!elt->private.msg.text.text.data) return NIL; } if (!(flags & FT_PEEK)) { /* mark as seen */ mail_elt (stream,msgno)->seen = T; mm_flags (stream,msgno); } if (!elt->private.msg.text.text.data) return NIL; INIT (bs,mail_string,elt->private.msg.text.text.data, elt->private.msg.text.text.size); return T; } /* MH mail ping mailbox * Accepts: MAIL stream * Returns: T if stream alive, else NIL */ long mh_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)) { /* directory exists? */ if (stream->inbox) return T; sprintf (tmp,"Can't open mailbox %.80s: no such mailbox",stream->mailbox); mm_log (tmp,ERROR); 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,mh_select,mh_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) { 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 */ } else { /* see if already read */ sprintf (tmp,"%s/%s",LOCAL->dir,names[i]->d_name); stat (tmp,&sbuf); /* get inode poop */ if (sbuf.st_atime > sbuf.st_mtime) elt->seen = T; } } fs_give ((void **) &names[i]); } /* free directory */ if (s = (void *) names) fs_give ((void **) &s); } /* if INBOX, snarf from system INBOX */ if (stream->inbox && strcmp (sysinbox (),stream->mailbox)) { old = stream->uid_last; 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_INTERNAL)) && (write (fd,s,j) == j) && (s = mail_fetchtext_full (sysibx,i,&j,FT_INTERNAL|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; mh_setdate (LOCAL->buf,elt); } else { /* failed to snarf */ if (fd) { /* did it ever get opened? */ mm_log ("Message copy to MH mailbox failed",ERROR); close (fd); /* close descriptor */ unlink (LOCAL->buf);/* flush this file */ } else { sprintf (tmp,"Can't add message: %s",strerror (errno)); mm_log (tmp,ERROR); } 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 */ } 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 */ } /* MH mail check mailbox * Accepts: MAIL stream */ void mh_check (MAILSTREAM *stream) { /* Perhaps in the future this will preserve flags */ if (mh_ping (stream)) mm_log ("Check completed",(long) NIL); } /* MH mail expunge mailbox * Accepts: MAIL stream */ void mh_expunge (MAILSTREAM *stream) { MESSAGECACHE *elt; unsigned long i = 1; unsigned long n = 0; unsigned long recent = stream->recent; 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 */ /* notify upper level of new mailbox size */ mail_exists (stream,stream->nmsgs); mail_recent (stream,recent); } /* MH mail copy message(s) * Accepts: MAIL stream * sequence * destination mailbox * copy options * Returns: T if copy successful, else NIL */ long mh_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options) { STRING st; MESSAGECACHE *elt; struct stat sbuf; int fd; unsigned long i; char 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) { sprintf (LOCAL->buf,"%s/%lu",LOCAL->dir,elt->private.uid); if ((fd = open (LOCAL->buf,O_RDONLY,NIL)) < 0) return NIL; fstat (fd,&sbuf); /* get size of message */ if (!elt->day) { /* make plausible IMAPish date string */ struct tm *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; } /* 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] = '\0'; close (fd); /* flush message file */ INIT (&st,mail_string,(void *) LOCAL->buf,sbuf.st_size); /* init flag string */ flags[0] = flags[1] = '\0'; 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 */ } /* MH mail append message from stringstruct * Accepts: MAIL stream * destination mailbox * append callback * data for callback * Returns: T if append successful, else NIL */ long mh_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data) { struct direct **names; int fd; char c,*flags,*date,*s,tmp[MAILTMPLEN]; STRING *message; MESSAGECACHE elt; long i,size,last,nfiles; long ret = LONGT; /* default stream to prototype */ if (!stream) stream = &mhproto; /* make sure valid mailbox */ if (!mh_isvalid (mailbox,tmp,NIL)) switch (errno) { case ENOENT: /* no such file? */ if ((mailbox[0] == '#') && ((mailbox[1] == 'M') || (mailbox[1] == 'm')) && ((mailbox[2] == 'H') || (mailbox[2] == 'h')) && ((mailbox[3] == 'I') || (mailbox[3] == 'i')) && ((mailbox[4] == 'N') || (mailbox[4] == 'n')) && ((mailbox[5] == 'B') || (mailbox[5] == 'b')) && ((mailbox[6] == 'O') || (mailbox[6] == 'o')) && ((mailbox[7] == 'X') || (mailbox[7] == 'x')) && !mailbox[8]) mh_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 MH-format mailbox name: %.80s",mailbox); mm_log (tmp,ERROR); return NIL; default: sprintf (tmp,"Not a MH-format mailbox: %.80s",mailbox); mm_log (tmp,ERROR); return NIL; } /* get first message */ if (!(*af) (stream,data,&flags,&date,&message)) return NIL; if ((nfiles = scandir (tmp,&names,mh_select,mh_numsort)) > 0) { /* largest number */ last = atoi (names[nfiles-1]->d_name); for (i = 0; i < nfiles; ++i) /* free directory */ fs_give ((void **) &names[i]); } else last = 0; /* no messages here yet */ if (s = (void *) names) fs_give ((void **) &s); mm_critical (stream); /* go critical */ do { if (date) { /* want to preserve date? */ /* yes, parse date into an elt */ if (!mail_parse_date (&elt,date)) { sprintf (tmp,"Bad date in append: %.80s",date); mm_log (tmp,ERROR); ret = NIL; break; } } mh_file (tmp,mailbox); /* build file name we will use */ sprintf (tmp + strlen (tmp),"/%ld",++last); if ((fd = open (tmp,O_WRONLY|O_CREAT|O_EXCL,S_IREAD|S_IWRITE)) < 0) { sprintf (tmp,"Can't open append message: %s",strerror (errno)); mm_log (tmp,ERROR); ret = NIL; break; } /* copy the data w/o CR's */ for (size = 0,i = SIZE (message),s = (char *) fs_get (i + 1); i; --i) if ((c = SNX (message)) != '\015') s[size++] = c; /* write the data */ if ((write (fd,s,size) < 0) || fsync (fd)) { unlink (tmp); /* delete message */ sprintf (tmp,"Message append failed: %s",strerror (errno)); mm_log (tmp,ERROR); ret = NIL; } fs_give ((void **) &s); /* flush the buffer */ close (fd); /* close the file */ if (ret) { /* set the date for this message */ if (date) mh_setdate (tmp,&elt); /* get next message */ if (!(*af) (stream,data,&flags,&date,&message)) ret = NIL; } } while (ret && message); mm_nocritical (stream); /* release critical */ return ret; } /* Internal routines */ /* MH file name selection test * Accepts: candidate directory entry * Returns: T to use file name, NIL to skip it */ int mh_select (struct direct *name) { char c; char *s = name->d_name; while (c = *s++) if (!isdigit (c)) return NIL; return T; } /* MH 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 mh_numsort (const void *d1,const void *d2) { return atoi ((*(struct direct **) d1)->d_name) - atoi ((*(struct direct **) d2)->d_name); } /* MH mail build file name * Accepts: destination string * source * Returns: destination */ char *mh_file (char *dst,char *name) { char *s,tmp[MAILTMPLEN]; /* build composite name */ sprintf (dst,"%s/%.900s",mh_path, strcmp (ucase (strcpy (tmp,name)),"#MHINBOX") ? name + 4 : "inbox"); /* tie off unnecessary trailing / */ if ((s = strrchr (dst,'/')) && !s[1] && (s[-1] == '/')) *s = '\0'; return dst; } /* MH canonicalize name * Accepts: buffer to write name * reference * pattern * Returns: T if success, NIL if failure */ long mh_canonicalize (char *pattern,char *ref,char *pat) { char tmp[MAILTMPLEN]; if (ref && *ref) { /* have a reference */ strcpy (pattern,ref); /* copy reference to pattern */ /* # overrides mailbox field in reference */ if (*pat == '#') strcpy (pattern,pat); /* pattern starts, reference ends, with / */ else if ((*pat == '/') && (pattern[strlen (pattern) - 1] == '/')) strcat (pattern,pat + 1); /* append, omitting one of the period */ else strcat (pattern,pat); /* anything else is just appended */ } else strcpy (pattern,pat); /* just have basic name */ return (mh_isvalid (pattern,tmp,T)); } /* Set date for message * Accepts: file name * elt containing date */ void mh_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 */ }