Edit File: mix.c
/* ======================================================================== * Copyright 1988-2008 University of Washington * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * * ======================================================================== */ /* * Program: MIX mail routines * * Author(s): Mark Crispin * UW Technology * University of Washington * Seattle, WA 98195 * Internet: MRC@Washington.EDU * * Date: 1 March 2006 * Last Edited: 7 May 2008 */ #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 "misc.h" #include "dummy.h" #include "fdstring.h" /* MIX definitions */ #define MEGABYTE (1024*1024) #define MIXDATAROLL MEGABYTE /* size at which we roll to a new file */ /* MIX files */ #define MIXNAME ".mix" /* prefix for all MIX file names */ #define MIXMETA "meta" /* suffix for metadata */ #define MIXINDEX "index" /* suffix for index */ #define MIXSTATUS "status" /* suffix for status */ #define MIXSORTCACHE "sortcache"/* suffix for sortcache */ #define METAMAX (MEGABYTE-1) /* maximum metadata file size (sanity check) */ /* MIX file formats */ /* sequence format (all but msg files) */ #define SEQFMT "S%08lx\015\012" /* metadata file format */ #define MTAFMT "V%08lx\015\012L%08lx\015\012N%08lx\015\012" /* index file record format */ #define IXRFMT ":%08lx:%04d%02d%02d%02d%02d%02d%c%02d%02d:%08lx:%08lx:%08lx:%08lx:%08lx:\015\012" /* status file record format */ #define STRFMT ":%08lx:%08lx:%04x:%08lx:\015\012" /* message file header format */ #define MSRFMT "%s%08lx:%04d%02d%02d%02d%02d%02d%c%02d%02d:%08lx:\015\012" #define MSGTOK ":msg:" #define MSGTSZ (sizeof(MSGTOK)-1) /* sortcache file record format */ #define SCRFMT ":%08lx:%08lx:%08lx:%08lx:%08lx:%c%08lx:%08lx:%08lx:\015\012" /* MIX I/O stream local data */ typedef struct mix_local { unsigned long curmsg; /* current message file number */ unsigned long newmsg; /* current new message file number */ time_t lastsnarf; /* last snarf time */ int msgfd; /* file description of current msg file */ int mfd; /* file descriptor of open metadata */ unsigned long metaseq; /* metadata sequence */ char *index; /* mailbox index name */ unsigned long indexseq; /* index sequence */ char *status; /* mailbox status name */ unsigned long statusseq; /* status sequence */ char *sortcache; /* mailbox sortcache name */ unsigned long sortcacheseq; /* sortcache sequence */ unsigned char *buf; /* temporary buffer */ unsigned long buflen; /* current size of temporary buffer */ unsigned int expok : 1; /* non-zero if expunge reports OK */ unsigned int internal : 1; /* internally opened, do not validate */ } MIXLOCAL; #define MIXBURP struct mix_burp MIXBURP { unsigned long fileno; /* message file number */ char *name; /* message file name */ SEARCHSET *tail; /* tail of ranges */ SEARCHSET set; /* set of retained ranges */ MIXBURP *next; /* next file to burp */ }; /* Convenient access to local data */ #define LOCAL ((MIXLOCAL *) stream->local) /* Function prototypes */ DRIVER *mix_valid (char *name); long mix_isvalid (char *name,char *meta); void *mix_parameters (long function,void *value); long mix_dirfmttest (char *name); void mix_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents); long mix_scan_contents (char *name,char *contents,unsigned long csiz, unsigned long fsiz); void mix_list (MAILSTREAM *stream,char *ref,char *pat); void mix_lsub (MAILSTREAM *stream,char *ref,char *pat); long mix_subscribe (MAILSTREAM *stream,char *mailbox); long mix_unsubscribe (MAILSTREAM *stream,char *mailbox); long mix_create (MAILSTREAM *stream,char *mailbox); long mix_delete (MAILSTREAM *stream,char *mailbox); long mix_rename (MAILSTREAM *stream,char *old,char *newname); int mix_rselect (struct direct *name); MAILSTREAM *mix_open (MAILSTREAM *stream); void mix_close (MAILSTREAM *stream,long options); void mix_abort (MAILSTREAM *stream); char *mix_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *length, long flags); long mix_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags); void mix_flag (MAILSTREAM *stream,char *sequence,char *flag,long flags); unsigned long *mix_sort (MAILSTREAM *stream,char *charset,SEARCHPGM *spg, SORTPGM *pgm,long flags); THREADNODE *mix_thread (MAILSTREAM *stream,char *type,char *charset, SEARCHPGM *spg,long flags); long mix_ping (MAILSTREAM *stream); void mix_check (MAILSTREAM *stream); long mix_expunge (MAILSTREAM *stream,char *sequence,long options); int mix_select (struct direct *name); int mix_msgfsort (const void *d1,const void *d2); long mix_addset (SEARCHSET **set,unsigned long start,unsigned long size); long mix_burp (MAILSTREAM *stream,MIXBURP *burp,unsigned long *reclaimed); long mix_burp_check (SEARCHSET *set,size_t size,char *file); long mix_copy (MAILSTREAM *stream,char *sequence,char *mailbox, long options); long mix_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data); long mix_append_msg (MAILSTREAM *stream,FILE *f,char *flags,MESSAGECACHE *delt, STRING *msg,SEARCHSET *set,unsigned long seq); FILE *mix_parse (MAILSTREAM *stream,FILE **idxf,long iflags,long sflags); char *mix_meta_slurp (MAILSTREAM *stream,unsigned long *seq); long mix_meta_update (MAILSTREAM *stream); long mix_index_update (MAILSTREAM *stream,FILE *idxf,long flag); long mix_status_update (MAILSTREAM *stream,FILE *statf,long flag); FILE *mix_data_open (MAILSTREAM *stream,int *fd,long *size, unsigned long newsize); FILE *mix_sortcache_open (MAILSTREAM *stream); long mix_sortcache_update (MAILSTREAM *stream,FILE **sortcache); char *mix_read_record (FILE *f,char *buf,unsigned long buflen,char *type); unsigned long mix_read_sequence (FILE *f); char *mix_dir (char *dst,char *name); char *mix_file (char *dst,char *dir,char *name); char *mix_file_data (char *dst,char *dir,unsigned long data); unsigned long mix_modseq (unsigned long oldseq); /* MIX mail routines */ /* Driver dispatch used by MAIL */ DRIVER mixdriver = { "mix", /* driver name */ /* driver flags */ DR_MAIL|DR_LOCAL|DR_NOFAST|DR_CRLF|DR_LOCKING|DR_DIRFMT|DR_MODSEQ, (DRIVER *) NIL, /* next driver */ mix_valid, /* mailbox is valid for us */ mix_parameters, /* manipulate parameters */ mix_scan, /* scan mailboxes */ mix_list, /* find mailboxes */ mix_lsub, /* find subscribed mailboxes */ mix_subscribe, /* subscribe to mailbox */ mix_unsubscribe, /* unsubscribe from mailbox */ mix_create, /* create mailbox */ mix_delete, /* delete mailbox */ mix_rename, /* rename mailbox */ mail_status_default, /* status of mailbox */ mix_open, /* open mailbox */ mix_close, /* close mailbox */ NIL, /* fetch message "fast" attributes */ NIL, /* fetch message flags */ NIL, /* fetch overview */ NIL, /* fetch message envelopes */ mix_header, /* fetch message header only */ mix_text, /* fetch message body only */ NIL, /* fetch partial message test */ NIL, /* unique identifier */ NIL, /* message number */ mix_flag, /* modify flags */ NIL, /* per-message modify flags */ NIL, /* search for message based on criteria */ mix_sort, /* sort messages */ mix_thread, /* thread messages */ mix_ping, /* ping mailbox to see if still alive */ mix_check, /* check for new messages */ mix_expunge, /* expunge deleted messages */ mix_copy, /* copy messages to another mailbox */ mix_append, /* append string message to mailbox */ NIL /* garbage collect stream */ }; /* prototype stream */ MAILSTREAM mixproto = {&mixdriver}; /* MIX mail validate mailbox * Accepts: mailbox name * Returns: our driver if name is valid, NIL otherwise */ DRIVER *mix_valid (char *name) { char tmp[MAILTMPLEN]; return mix_isvalid (name,tmp) ? &mixdriver : NIL; } /* MIX mail test for valid mailbox * Accepts: mailbox name * buffer to return meta name * Returns: T if valid, NIL otherwise, metadata name written in both cases */ long mix_isvalid (char *name,char *meta) { char dir[MAILTMPLEN]; struct stat sbuf; /* validate name as directory */ if (!(errno = ((strlen (name) > NETMAXMBX) ? ENAMETOOLONG : NIL)) && *mix_dir (dir,name) && mix_file (meta,dir,MIXMETA) && !stat (dir,&sbuf) && ((sbuf.st_mode & S_IFMT) == S_IFDIR)) { /* name is directory; is it mix? */ if (!stat (meta,&sbuf) && ((sbuf.st_mode & S_IFMT) == S_IFREG)) return LONGT; else errno = NIL; /* directory but not mix */ } return NIL; } /* MIX manipulate driver parameters * Accepts: function code * function-dependent value * Returns: function-dependent return value */ void *mix_parameters (long function,void *value) { void *ret = NIL; switch ((int) function) { case GET_INBOXPATH: if (value) ret = mailboxfile ((char *) value,"~/INBOX"); break; case GET_DIRFMTTEST: ret = (void *) mix_dirfmttest; break; case GET_SCANCONTENTS: ret = (void *) mix_scan_contents; break; case SET_ONETIMEEXPUNGEATPING: if (value) ((MIXLOCAL *) ((MAILSTREAM *) value)->local)->expok = T; case GET_ONETIMEEXPUNGEATPING: if (value) ret = (void *) (((MIXLOCAL *) ((MAILSTREAM *) value)->local)->expok ? VOIDT : NIL); break; } return ret; } /* MIX test for directory format internal node * Accepts: candidate node name * Returns: T if internal name, NIL otherwise */ long mix_dirfmttest (char *name) { /* belongs to MIX if starts with .mix */ return strncmp (name,MIXNAME,sizeof (MIXNAME) - 1) ? NIL : LONGT; } /* MIX mail scan mailboxes * Accepts: mail stream * reference * pattern to search * string to scan */ void mix_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents) { if (stream) dummy_scan (NIL,ref,pat,contents); } /* MIX scan mailbox for contents * Accepts: mailbox name * desired contents * contents size * file size (ignored) * Returns: NIL if contents not found, T if found */ long mix_scan_contents (char *name,char *contents,unsigned long csiz, unsigned long fsiz) { long i,nfiles; void *a; char *s; long ret = NIL; size_t namelen = strlen (name); struct stat sbuf; struct direct **names = NIL; if ((nfiles = scandir (name,&names,mix_select,mix_msgfsort)) > 0) for (i = 0; i < nfiles; ++i) { if (!ret) { sprintf (s = (char *) fs_get (namelen + strlen (names[i]->d_name) + 2), "%s/%s",name,names[i]->d_name); if (!stat (s,&sbuf) && (csiz <= sbuf.st_size)) ret = dummy_scan_contents (s,contents,csiz,sbuf.st_size); fs_give ((void **) &s); } fs_give ((void **) &names[i]); } /* free directory list */ if (a = (void *) names) fs_give ((void **) &a); return ret; } /* MIX list mailboxes * Accepts: mail stream * reference * pattern to search */ void mix_list (MAILSTREAM *stream,char *ref,char *pat) { if (stream) dummy_list (NIL,ref,pat); } /* MIX list subscribed mailboxes * Accepts: mail stream * reference * pattern to search */ void mix_lsub (MAILSTREAM *stream,char *ref,char *pat) { if (stream) dummy_lsub (NIL,ref,pat); } /* MIX mail subscribe to mailbox * Accepts: mail stream * mailbox to add to subscription list * Returns: T on success, NIL on failure */ long mix_subscribe (MAILSTREAM *stream,char *mailbox) { return sm_subscribe (mailbox); } /* MIX mail unsubscribe to mailbox * Accepts: mail stream * mailbox to delete from subscription list * Returns: T on success, NIL on failure */ long mix_unsubscribe (MAILSTREAM *stream,char *mailbox) { return sm_unsubscribe (mailbox); } /* MIX mail create mailbox * Accepts: mail stream * mailbox name to create * Returns: T on success, NIL on failure */ long mix_create (MAILSTREAM *stream,char *mailbox) { DRIVER *test; FILE *f; int c,i; char *t,tmp[MAILTMPLEN],file[MAILTMPLEN]; char *s = strrchr (mailbox,'/'); unsigned long now = time (NIL); long ret = NIL; /* always create \NoSelect if trailing / */ if (s && !s[1]) return dummy_create (stream,mailbox); /* validate name */ if (mix_dirfmttest (s ? s + 1 : mailbox)) sprintf(tmp,"Can't create mailbox %.80s: invalid MIX-format name",mailbox); /* must not already exist */ else if ((test = mail_valid (NIL,mailbox,NIL)) && strcmp (test->name,"dummy")) sprintf (tmp,"Can't create mailbox %.80s: mailbox already exists",mailbox); /* create directory and metadata */ else if (!dummy_create_path (stream, mix_file (file,mix_dir (tmp,mailbox),MIXMETA), get_dir_protection (mailbox))) sprintf (tmp,"Can't create mailbox %.80s: %.80s",mailbox,strerror (errno)); else if (!(f = fopen (file,"w"))) sprintf (tmp,"Can't re-open metadata %.80s: %.80s",mailbox, strerror (errno)); else { /* success, write initial metadata */ fprintf (f,SEQFMT,now); fprintf (f,MTAFMT,now,0,now); for (i = 0, c = 'K'; (i < NUSERFLAGS) && (t = (stream && stream->user_flags[i]) ? stream->user_flags[i] : default_user_flag (i)) && *t; ++i) { putc (c,f); /* write another keyword */ fputs (t,f); c = ' '; /* delimiter is now space */ } fclose (f); set_mbx_protections (mailbox,file); /* point to suffix */ s = file + strlen (file) - (sizeof (MIXMETA) - 1); strcpy (s,MIXINDEX); /* create index */ if (!dummy_create_path (stream,file,get_dir_protection (mailbox))) sprintf (tmp,"Can't create mix mailbox index: %.80s",strerror (errno)); else { set_mbx_protections (mailbox,file); strcpy (s,MIXSTATUS); /* create status */ if (!dummy_create_path (stream,file,get_dir_protection (mailbox))) sprintf (tmp,"Can't create mix mailbox status: %.80s", strerror (errno)); else { set_mbx_protections (mailbox,file); sprintf (s,"%08lx",now);/* message file */ if (!dummy_create_path (stream,file,get_dir_protection (mailbox))) sprintf (tmp,"Can't create mix mailbox data: %.80s", strerror (errno)); else { set_mbx_protections (mailbox,file); ret = LONGT; /* declare success at this point */ } } } } if (!ret) MM_LOG (tmp,ERROR); /* some error */ return ret; } /* MIX mail delete mailbox * mailbox name to delete * Returns: T on success, NIL on failure */ long mix_delete (MAILSTREAM *stream,char *mailbox) { DIR *dirp; struct direct *d; int fd = -1; char *s,tmp[MAILTMPLEN]; if (!mix_isvalid (mailbox,tmp)) sprintf (tmp,"Can't delete mailbox %.80s: no such mailbox",mailbox); else if (((fd = open (tmp,O_RDWR,NIL)) < 0) || flock (fd,LOCK_EX|LOCK_NB)) sprintf (tmp,"Can't lock mailbox for delete: %.80s",mailbox); /* delete metadata */ else if (unlink (tmp)) sprintf (tmp,"Can't delete mailbox %.80s index: %80s", mailbox,strerror (errno)); else { close (fd); /* close descriptor on deleted metadata */ /* get directory name */ *(s = strrchr (tmp,'/')) = '\0'; if (dirp = opendir (tmp)) { /* open directory */ *s++ = '/'; /* restore delimiter */ /* massacre messages */ while (d = readdir (dirp)) if (mix_dirfmttest (d->d_name)) { strcpy (s,d->d_name); /* make path */ unlink (tmp); /* sayonara */ } closedir (dirp); /* flush directory */ *(s = strrchr (tmp,'/')) = '\0'; if (rmdir (tmp)) { /* try to remove the directory */ sprintf (tmp,"Can't delete name %.80s: %.80s", mailbox,strerror (errno)); MM_LOG (tmp,WARN); } } return T; /* always success */ } if (fd >= 0) close (fd); /* close any descriptor on metadata */ MM_LOG (tmp,ERROR); /* something failed */ return NIL; } /* MIX mail rename mailbox * Accepts: MIX mail stream * old mailbox name * new mailbox name * Returns: T on success, NIL on failure */ long mix_rename (MAILSTREAM *stream,char *old,char *newname) { char c,*s,tmp[MAILTMPLEN],tmp1[MAILTMPLEN]; struct stat sbuf; int fd = -1; if (!mix_isvalid (old,tmp)) sprintf (tmp,"Can't rename mailbox %.80s: no such mailbox",old); else if (((fd = open (tmp,O_RDWR,NIL)) < 0) || flock (fd,LOCK_EX|LOCK_NB)) sprintf (tmp,"Can't lock mailbox for rename: %.80s",old); else if (mix_dirfmttest ((s = strrchr (newname,'/')) ? s + 1 : newname)) sprintf (tmp,"Can't rename to mailbox %.80s: invalid MIX-format name", newname); /* new mailbox name must not be valid */ else if (mix_isvalid (newname,tmp)) sprintf (tmp,"Can't rename to mailbox %.80s: destination already exists", newname); else { mix_dir (tmp,old); /* build old directory name */ mix_dir (tmp1,newname); /* and new directory name */ /* easy if not INBOX */ if (compare_cstring (old,"INBOX")) { /* found superior to destination name? */ if (s = strrchr (tmp1,'/')) { 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_path (stream,tmp1,get_dir_protection (newname))) return NIL; *s = c; /* restore full name */ } if (!rename (tmp,tmp1)) { close (fd); /* close descriptor on metadata */ return LONGT; } } /* RFC 3501 requires this */ else if (dummy_create_path (stream,strcat (tmp1,"/"), get_dir_protection (newname))) { void *a; int i,n,lasterror; char *src,*dst; struct direct **names = NIL; size_t srcl = strlen (tmp); size_t dstl = strlen (tmp1); /* rename each mix file to new directory */ for (i = lasterror = 0,n = scandir (tmp,&names,mix_rselect,alphasort); i < n; ++i) { size_t len = strlen (names[i]->d_name); sprintf (src = (char *) fs_get (srcl + len + 2),"%s/%s", tmp,names[i]->d_name); sprintf (dst = (char *) fs_get (dstl + len + 1),"%s%s", tmp1,names[i]->d_name); if (rename (src,dst)) lasterror = errno; fs_give ((void **) &src); fs_give ((void **) &dst); fs_give ((void **) &names[i]); } /* free directory list */ if (a = (void *) names) fs_give ((void **) &a); if (lasterror) errno = lasterror; else { close (fd); /* close descriptor on metadata */ return mix_create (NIL,"INBOX"); } } sprintf (tmp,"Can't rename mailbox %.80s to %.80s: %.80s", old,newname,strerror (errno)); } if (fd >= 0) close (fd); /* close any descriptor on metadata */ MM_LOG (tmp,ERROR); /* something failed */ return NIL; } /* MIX test for mix name * Accepts: candidate directory name * Returns: T if mix file name, NIL otherwise */ int mix_rselect (struct direct *name) { return mix_dirfmttest (name->d_name); } /* MIX mail open * Accepts: stream to open * Returns: stream on success, NIL on failure */ MAILSTREAM *mix_open (MAILSTREAM *stream) { short silent; /* return prototype for OP_PROTOTYPE call */ if (!stream) return user_flags (&mixproto); if (stream->local) fatal ("mix recycle stream"); stream->local = memset (fs_get (sizeof (MIXLOCAL)),0,sizeof (MIXLOCAL)); /* note if an INBOX or not */ stream->inbox = !compare_cstring (stream->mailbox,"INBOX"); /* make temporary buffer */ LOCAL->buf = (char *) fs_get (CHUNKSIZE); LOCAL->buflen = CHUNKSIZE - 1; /* set stream->mailbox to be directory name */ mix_dir (LOCAL->buf,stream->mailbox); fs_give ((void **) &stream->mailbox); stream->mailbox = cpystr (LOCAL->buf); LOCAL->msgfd = -1; /* currently no file open */ if (!(((!stream->rdonly && /* open metadata file */ ((LOCAL->mfd = open (mix_file (LOCAL->buf,stream->mailbox,MIXMETA), O_RDWR,NIL)) >= 0)) || ((stream->rdonly = T) && ((LOCAL->mfd = open (mix_file (LOCAL->buf,stream->mailbox,MIXMETA), O_RDONLY,NIL)) >= 0))) && !flock (LOCAL->mfd,LOCK_SH))) { MM_LOG ("Error opening mix metadata file",ERROR); mix_abort (stream); stream = NIL; /* open fails */ } else { /* metadata open, complete open */ LOCAL->index = cpystr (mix_file (LOCAL->buf,stream->mailbox,MIXINDEX)); LOCAL->status = cpystr (mix_file (LOCAL->buf,stream->mailbox,MIXSTATUS)); LOCAL->sortcache = cpystr (mix_file (LOCAL->buf,stream->mailbox, MIXSORTCACHE)); stream->sequence++; /* bump sequence number */ /* parse mailbox */ stream->nmsgs = stream->recent = 0; if (silent = stream->silent) LOCAL->internal = T; stream->silent = T; if (mix_ping (stream)) { /* do initial ping */ /* try burping in case we are exclusive */ if (!stream->rdonly) mix_expunge (stream,"",NIL); if (!(stream->nmsgs || stream->silent)) MM_LOG ("Mailbox is empty",(long) NIL); stream->silent = silent; /* now notify upper level */ mail_exists (stream,stream->nmsgs); 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 = /* can we create new user flags? */ (stream->user_flags[NUSERFLAGS-1] || stream->rdonly) ? NIL : T; } else { /* got murdelyzed in ping */ mix_abort (stream); stream = NIL; } } return stream; /* return stream to caller */ } /* MIX mail close * Accepts: MAIL stream * close options */ void mix_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 */ /* burp-only or expunge */ mix_expunge (stream,(options & CL_EXPUNGE) ? NIL : "",NIL); mix_abort (stream); stream->silent = silent; /* reset silent state */ } } /* MIX mail abort stream * Accepts: MAIL stream */ void mix_abort (MAILSTREAM *stream) { if (LOCAL) { /* only if a file is open */ /* close current message file if open */ if (LOCAL->msgfd >= 0) close (LOCAL->msgfd); /* close current metadata file if open */ if (LOCAL->mfd >= 0) close (LOCAL->mfd); if (LOCAL->index) fs_give ((void **) &LOCAL->index); if (LOCAL->status) fs_give ((void **) &LOCAL->status); if (LOCAL->sortcache) fs_give ((void **) &LOCAL->sortcache); /* 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 */ } } /* MIX 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 *mix_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *length, long flags) { unsigned long i,j,k; int fd; char *s,tmp[MAILTMPLEN]; MESSAGECACHE *elt; if (length) *length = 0; /* default return */ if (flags & FT_UID) return "";/* UID call "impossible" */ elt = mail_elt (stream,msgno);/* get elt */ /* is message in current message file? */ if ((LOCAL->msgfd < 0) || (elt->private.spare.data != LOCAL->curmsg)) { if (LOCAL->msgfd >= 0) close (LOCAL->msgfd); if ((LOCAL->msgfd = open (mix_file_data (LOCAL->buf,stream->mailbox, elt->private.spare.data), O_RDONLY,NIL)) < 0) return ""; /* got file */ LOCAL->curmsg = elt->private.spare.data; } lseek (LOCAL->msgfd,elt->private.special.offset,L_SET); /* size of special data and header */ j = elt->private.msg.header.offset + elt->private.msg.header.text.size; if (j > LOCAL->buflen) { /* is buffer big enough? */ /* no, make one that is */ fs_give ((void **) &LOCAL->buf); LOCAL->buf = (char *) fs_get ((LOCAL->buflen = j) + 1); } /* Maybe someday validate internaldate too */ /* slurp special data + header, validate */ if ((read (LOCAL->msgfd,LOCAL->buf,j) == j) && !strncmp (LOCAL->buf,MSGTOK,MSGTSZ) && (elt->private.uid == strtoul ((char *) LOCAL->buf + MSGTSZ,&s,16)) && (*s++ == ':') && (s = strchr (s,':')) && (k = strtoul (s+1,&s,16)) && (*s++ == ':') && (s < (char *) (LOCAL->buf + elt->private.msg.header.offset))) { /* won, set offset and size of message */ i = elt->private.msg.header.offset; *length = elt->private.msg.header.text.size; if (k != elt->rfc822_size) { sprintf (tmp,"Inconsistency in mix message size, uid=%lx (%lu != %lu)", elt->private.uid,elt->rfc822_size,k); MM_LOG (tmp,WARN); } } else { /* document the problem */ LOCAL->buf[100] = '\0'; /* tie off buffer at no more than 100 octets */ /* or at newline, whichever is first */ if (s = strpbrk (LOCAL->buf,"\015\012")) *s = '\0'; sprintf (tmp,"Error reading mix message header, uid=%lx, s=%.0lx, h=%s", elt->private.uid,elt->rfc822_size,LOCAL->buf); MM_LOG (tmp,ERROR); *length = i = j = 0; /* default to empty */ } LOCAL->buf[j] = '\0'; /* tie off buffer at the end */ return (char *) LOCAL->buf + i; } /* MIX 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 mix_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags) { unsigned long i; FDDATA d; MESSAGECACHE *elt; /* UID call "impossible" */ if (flags & FT_UID) return NIL; elt = mail_elt (stream,msgno); /* is message in current message file? */ if ((LOCAL->msgfd < 0) || (elt->private.spare.data != LOCAL->curmsg)) { if (LOCAL->msgfd >= 0) close (LOCAL->msgfd); if ((LOCAL->msgfd = open (mix_file_data (LOCAL->buf,stream->mailbox, elt->private.spare.data), O_RDONLY,NIL)) < 0) return NIL; /* got file */ LOCAL->curmsg = elt->private.spare.data; } /* doing non-peek fetch? */ if (!(flags & FT_PEEK) && !elt->seen) { FILE *idxf; /* yes, process metadata/index/status */ FILE *statf = mix_parse (stream,&idxf,NIL,LONGT); elt->seen = T; /* mark as seen */ MM_FLAGS (stream,elt->msgno); /* update status file if possible */ if (statf && !stream->rdonly) { elt->private.mod = LOCAL->statusseq = mix_modseq (LOCAL->statusseq); mix_status_update (stream,statf,NIL); } if (idxf) fclose (idxf); /* release index and status file */ if (statf) fclose (statf); } d.fd = LOCAL->msgfd; /* set up file descriptor */ /* offset of message text */ d.pos = elt->private.special.offset + elt->private.msg.header.offset + elt->private.msg.header.text.size; d.chunk = LOCAL->buf; /* initial buffer chunk */ d.chunksize = CHUNKSIZE; /* chunk size */ INIT (bs,fd_string,&d,elt->rfc822_size - elt->private.msg.header.text.size); return T; } /* MIX mail modify flags * Accepts: MAIL stream * sequence * flag(s) * option flags */ void mix_flag (MAILSTREAM *stream,char *sequence,char *flag,long flags) { MESSAGECACHE *elt; unsigned long i,uf,ffkey; long f; short nf; FILE *idxf; FILE *statf = mix_parse (stream,&idxf,NIL,LONGT); unsigned long seq = mix_modseq (LOCAL->statusseq); /* find first free key */ for (ffkey = 0; (ffkey < NUSERFLAGS) && stream->user_flags[ffkey]; ++ffkey); /* parse sequence and flags */ if (((flags & ST_UID) ? mail_uid_sequence (stream,sequence) : mail_sequence (stream,sequence)) && ((f = mail_parse_flags (stream,flag,&uf)) || uf)) { /* alter flags */ for (i = 1,nf = (flags & ST_SET) ? T : NIL; i <= stream->nmsgs; i++) if ((elt = mail_elt (stream,i))->sequence) { struct { /* old flags */ unsigned int seen : 1; unsigned int deleted : 1; unsigned int flagged : 1; unsigned int answered : 1; unsigned int draft : 1; unsigned long user_flags; } old; old.seen = elt->seen; old.deleted = elt->deleted; old.flagged = elt->flagged; old.answered = elt->answered; old.draft = elt->draft; old.user_flags = elt->user_flags; if (f&fSEEN) elt->seen = nf; if (f&fDELETED) elt->deleted = nf; if (f&fFLAGGED) elt->flagged = nf; if (f&fANSWERED) elt->answered = nf; if (f&fDRAFT) elt->draft = nf; /* user flags */ if (flags & ST_SET) elt->user_flags |= uf; else elt->user_flags &= ~uf; if ((old.seen != elt->seen) || (old.deleted != elt->deleted) || (old.flagged != elt->flagged) || (old.answered != elt->answered) || (old.draft != elt->draft) || (old.user_flags != elt->user_flags)) { if (!stream->rdonly) elt->private.mod = LOCAL->statusseq = seq; MM_FLAGS (stream,elt->msgno); } } /* update status file after change */ if (statf && (seq == LOCAL->statusseq)) mix_status_update (stream,statf,NIL); /* update metadata if created a keyword */ if ((ffkey < NUSERFLAGS) && stream->user_flags[ffkey] && !mix_meta_update (stream)) MM_LOG ("Error updating mix metadata after keyword creation",ERROR); } if (statf) fclose (statf); /* release status file if still open */ if (idxf) fclose (idxf); /* release index file */ } /* MIX mail sort messages * Accepts: mail stream * character set * search program * sort program * option flags * Returns: vector of sorted message sequences or NIL if error */ unsigned long *mix_sort (MAILSTREAM *stream,char *charset,SEARCHPGM *spg, SORTPGM *pgm,long flags) { unsigned long *ret; FILE *sortcache = mix_sortcache_open (stream); ret = mail_sort_msgs (stream,charset,spg,pgm,flags); mix_sortcache_update (stream,&sortcache); return ret; } /* MIX mail thread messages * Accepts: mail stream * thread type * character set * search program * option flags * Returns: thread node tree or NIL if error */ THREADNODE *mix_thread (MAILSTREAM *stream,char *type,char *charset, SEARCHPGM *spg,long flags) { THREADNODE *ret; FILE *sortcache = mix_sortcache_open (stream); ret = mail_thread_msgs (stream,type,charset,spg,flags,mail_sort_msgs); mix_sortcache_update (stream,&sortcache); return ret; } /* MIX mail ping mailbox * Accepts: MAIL stream * Returns: T if stream alive, else NIL */ static int snarfing = 0; /* lock against recursive snarfing */ long mix_ping (MAILSTREAM *stream) { FILE *idxf,*statf; struct stat sbuf; STRING msg; MESSAGECACHE *elt; int mfd,ifd,sfd; unsigned long i,msglen; char *message,date[MAILTMPLEN],flags[MAILTMPLEN]; MAILSTREAM *sysibx = NIL; long ret = NIL; long snarfok = LONGT; /* time to snarf? */ if (stream->inbox && !stream->rdonly && !snarfing && (time (0) >= (LOCAL->lastsnarf + (time_t) mail_parameters (NIL,GET_SNARFINTERVAL,NIL)))) { appenduid_t au = (appenduid_t) mail_parameters (NIL,GET_APPENDUID,NIL); copyuid_t cu = (copyuid_t) mail_parameters (NIL,GET_COPYUID,NIL); MM_CRITICAL (stream); /* go critical */ snarfing = T; /* don't recursively snarf */ /* disable APPENDUID/COPYUID callbacks */ mail_parameters (NIL,SET_APPENDUID,NIL); mail_parameters (NIL,SET_COPYUID,NIL); /* sizes match and anything in sysinbox? */ if (!stat (sysinbox (),&sbuf) && ((sbuf.st_mode & S_IFMT) == S_IFREG) && sbuf.st_size && (sysibx = mail_open (sysibx,sysinbox (),OP_SILENT)) && !sysibx->rdonly && sysibx->nmsgs) { /* for each message in sysibx mailbox */ for (i = 1; snarfok && (i <= sysibx->nmsgs); ++i) if (!(elt = mail_elt (sysibx,i))->deleted && (message = mail_fetch_message (sysibx,i,&msglen,FT_PEEK)) && msglen) { mail_date (date,elt); /* make internal date string */ /* make flag string */ flags[0] = flags[1] = '\0'; if (elt->seen) strcat (flags," \\Seen"); if (elt->flagged) strcat (flags," \\Flagged"); if (elt->answered) strcat (flags," \\Answered"); if (elt->draft) strcat (flags," \\Draft"); flags[0] = '('; strcat (flags,")"); INIT (&msg,mail_string,message,msglen); if (snarfok = mail_append_full (stream,"INBOX",flags,date,&msg)) { char sequence[15]; sprintf (sequence,"%lu",i); mail_flag (sysibx,sequence,"\\Deleted",ST_SET); } } /* now expunge all those messages */ if (snarfok) mail_expunge (sysibx); else { sprintf (LOCAL->buf,"Can't copy new mail at message: %lu",i - 1); MM_LOG (LOCAL->buf,WARN); } } if (sysibx) mail_close (sysibx); /* reenable APPENDUID/COPYUID */ mail_parameters (NIL,SET_APPENDUID,(void *) au); mail_parameters (NIL,SET_COPYUID,(void *) cu); snarfing = NIL; /* no longer snarfing */ MM_NOCRITICAL (stream); /* release critical */ LOCAL->lastsnarf = time (0);/* note time of last snarf */ } /* expunging OK if global flag set */ if (mail_parameters (NIL,GET_EXPUNGEATPING,NIL)) LOCAL->expok = T; /* process metadata/index/status */ if (statf = mix_parse (stream,&idxf,LONGT, (LOCAL->internal ? NIL : LONGT))) { fclose (statf); /* just close the status file */ ret = LONGT; /* declare success */ } if (idxf) fclose (idxf); /* release index file */ LOCAL->expok = NIL; /* expunge no longer OK */ if (!ret) mix_abort (stream); /* murdelyze stream if ping fails */ return ret; } /* MIX mail checkpoint mailbox (burp only) * Accepts: MAIL stream */ void mix_check (MAILSTREAM *stream) { if (stream->rdonly) /* won't do on readonly files! */ MM_LOG ("Checkpoint ignored on readonly mailbox",NIL); /* do burp-only expunge action */ if (mix_expunge (stream,"",NIL)) MM_LOG ("Check completed",(long) NIL); } /* MIX mail expunge mailbox * Accepts: MAIL stream * sequence to expunge if non-NIL, empty string for burp only * expunge options * Returns: T on success, NIL if failure */ long mix_expunge (MAILSTREAM *stream,char *sequence,long options) { FILE *idxf = NIL; FILE *statf = NIL; MESSAGECACHE *elt; int ifd,sfd; long ret; unsigned long i; unsigned long nexp = 0; unsigned long reclaimed = 0; int burponly = (sequence && !*sequence); LOCAL->expok = T; /* expunge during ping is OK */ if (!(ret = burponly || !sequence || ((options & EX_UID) ? mail_uid_sequence (stream,sequence) : mail_sequence (stream,sequence))) || stream->rdonly); /* read index and open status exclusive */ else if (statf = mix_parse (stream,&idxf,LONGT, LOCAL->internal ? NIL : LONGT)) { /* expunge unless just burping */ if (!burponly) for (i = 1; i <= stream->nmsgs;) { elt = mail_elt (stream,i);/* need to expunge this message? */ if (sequence ? elt->sequence : elt->deleted) { ++nexp; /* yes, make it so */ mail_expunged (stream,i); } else ++i; /* otherwise advance to next message */ } /* burp if can get exclusive access */ if (!flock (LOCAL->mfd,LOCK_EX|LOCK_NB)) { void *a; struct direct **names = NIL; long nfiles = scandir (stream->mailbox,&names,mix_select,mix_msgfsort); if (nfiles > 0) { /* if have message files */ MIXBURP *burp,*cur; /* initialize burp list */ for (i = 0, burp = cur = NIL; i < nfiles; ++i) { MIXBURP *nxt = (MIXBURP *) memset (fs_get (sizeof (MIXBURP)),0, sizeof (MIXBURP)); /* another file found */ if (cur) cur = cur->next = nxt; else cur = burp = nxt; cur->name = names[i]->d_name; cur->fileno = strtoul (cur->name + sizeof (MIXNAME) - 1,NIL,16); cur->tail = &cur->set; fs_give ((void **) &names[i]); } /* now load ranges */ for (i = 1, cur = burp; ret && (i <= stream->nmsgs); i++) { /* is this message in current set? */ elt = mail_elt (stream,i); if (cur && (elt->private.spare.data != cur->fileno)) { /* restart if necessary */ if (elt->private.spare.data < cur->fileno) cur = burp; /* hunt for appropriate mailbox */ while (cur && (elt->private.spare.data > cur->fileno)) cur = cur->next; /* ought to have found it now... */ if (cur && (elt->private.spare.data != cur->fileno)) cur = NIL; } /* if found, add to set */ if (cur) ret = mix_addset (&cur->tail,elt->private.special.offset, elt->private.msg.header.offset + elt->rfc822_size); else { /* uh-oh */ sprintf (LOCAL->buf,"Can't locate mix message file %.08lx", elt->private.spare.data); MM_LOG (LOCAL->buf,ERROR); ret = NIL; } } if (ret) /* if no errors, burp all files */ for (cur = burp; ret && cur; cur = cur->next) { /* if non-empty, burp it */ if (cur->set.last) ret = mix_burp (stream,cur,&reclaimed); /* empty, delete it unless new msg file */ else if (mix_file_data (LOCAL->buf,stream->mailbox,cur->fileno) && ((cur->fileno == LOCAL->newmsg) ? truncate (LOCAL->buf,0) : unlink (LOCAL->buf))) { sprintf (LOCAL->buf, "Can't delete empty message file %.80s: %.80s", cur->name,strerror (errno)); MM_LOG (LOCAL->buf,WARN); } } } else MM_LOG ("No mix message files found during expunge",WARN); /* free directory list */ if (a = (void *) names) fs_give ((void **) &a); } /* either way, re-acquire shared lock */ if (flock (LOCAL->mfd,LOCK_SH|LOCK_NB)) fatal ("Unable to re-acquire metadata shared lock!"); /* Do this step even if ret is NIL (meaning some burp problem)! */ if (nexp || reclaimed) { /* rewrite index and status if changed */ LOCAL->indexseq = mix_modseq (LOCAL->indexseq); if (mix_index_update (stream,idxf,NIL)) { LOCAL->statusseq = mix_modseq (LOCAL->statusseq); /* set failure if update fails */ ret = mix_status_update (stream,statf,NIL); } } } if (statf) fclose (statf); /* close status if still open */ if (idxf) fclose (idxf); /* close index if still open */ LOCAL->expok = NIL; /* cancel expok */ if (ret) { /* only if success */ char *s = NIL; if (nexp) sprintf (s = LOCAL->buf,"Expunged %lu messages",nexp); else if (reclaimed) sprintf (s=LOCAL->buf,"Reclaimed %lu bytes of expunged space",reclaimed); else if (!burponly) s = stream->rdonly ? "Expunge ignored on readonly mailbox" : "No messages deleted, so no update needed"; if (s) MM_LOG (s,(long) NIL); } return ret; } /* MIX test for message file name * Accepts: candidate directory name * Returns: T if message file name, NIL otherwise * * ".mix" with no suffix was used by experimental versions */ int mix_select (struct direct *name) { char c,*s; /* make sure name has prefix */ if (mix_dirfmttest (name->d_name)) { for (c = *(s = name->d_name + sizeof (MIXNAME) - 1); c && isxdigit (c); c = *s++); if (!c) return T; /* all-hex or no suffix */ } return NIL; /* not suffix or non-hex */ } /* MIX msg file name comparision * Accepts: first candidate directory entry * second candidate directory entry * Returns: -1 if d1 < d2, 0 if d1 == d2, 1 d1 > d2 */ int mix_msgfsort (const void *d1,const void *d2) { char *n1 = (*(struct direct **) d1)->d_name + sizeof (MIXNAME) - 1; char *n2 = (*(struct direct **) d2)->d_name + sizeof (MIXNAME) - 1; return compare_ulong (*n1 ? strtoul (n1,NIL,16) : 0, *n2 ? strtoul (n2,NIL,16) : 0); } /* MIX add a range to a set * Accepts: pointer to set to add * start of set * size of set * Returns: T if success, set updated, NIL otherwise */ long mix_addset (SEARCHSET **set,unsigned long start,unsigned long size) { SEARCHSET *s = *set; if (start < s->last) { /* sanity check */ char tmp[MAILTMPLEN]; sprintf (tmp,"Backwards-running mix index %lu < %lu",start,s->last); MM_LOG (tmp,ERROR); return NIL; } /* range initially empty? */ if (!s->last) s->first = start; else if (start > s->last) /* no, start new range if can't append */ (*set = s = s->next = mail_newsearchset ())->first = start; s->last = start + size; /* end of current range */ return LONGT; } /* MIX burp message file * Accepts: MAIL stream * current burp block for this message * Returns: T if successful, NIL if failed */ static char *staterr = "Error in stat of mix message file %.80s: %.80s"; static char *truncerr = "Error truncating mix message file %.80s: %.80s"; long mix_burp (MAILSTREAM *stream,MIXBURP *burp,unsigned long *reclaimed) { MESSAGECACHE *elt; SEARCHSET *set; struct stat sbuf; off_t rpos,wpos; size_t size,wsize,wpending,written; int fd; FILE *f; void *s; unsigned long i; long ret = NIL; /* build file name */ mix_file_data (LOCAL->buf,stream->mailbox,burp->fileno); /* need to burp at start or multiple ranges? */ if (!burp->set.first && !burp->set.next) { /* easy case, single range at start of file */ if (stat (LOCAL->buf,&sbuf)) { sprintf (LOCAL->buf,staterr,burp->name,strerror (errno)); MM_LOG (LOCAL->buf,ERROR); } /* is this range sane? */ else if (mix_burp_check (&burp->set,sbuf.st_size,LOCAL->buf)) { /* if matches range then no burp needed! */ if (burp->set.last == sbuf.st_size) ret = LONGT; /* just need to remove cruft at end */ else if (ret = !truncate (LOCAL->buf,burp->set.last)) *reclaimed += sbuf.st_size - burp->set.last; else { sprintf (LOCAL->buf,truncerr,burp->name,strerror (errno)); MM_LOG (LOCAL->buf,ERROR); } } } /* have to do more work, get the file */ else if (((fd = open (LOCAL->buf,O_RDWR,NIL)) < 0) || !(f = fdopen (fd,"r+b"))) { sprintf (LOCAL->buf,"Error opening mix message file %.80s: %.80s", burp->name,strerror (errno)); MM_LOG (LOCAL->buf,ERROR); if (fd >= 0) close (fd); /* in case fdopen() failure */ } else if (fstat (fd,&sbuf)) { /* get file size */ sprintf (LOCAL->buf,staterr,burp->name,strerror (errno)); MM_LOG (LOCAL->buf,ERROR); fclose (f); } /* only if sane */ else if (mix_burp_check (&burp->set,sbuf.st_size,LOCAL->buf)) { /* make sure each range starts with token */ for (set = &burp->set; set; set = set->next) if (fseek (f,set->first,SEEK_SET) || (fread (LOCAL->buf,1,MSGTSZ,f) != MSGTSZ) || strncmp (LOCAL->buf,MSGTOK,MSGTSZ)) { sprintf (LOCAL->buf,"Bad message token in mix message file at %lu", set->first); MM_LOG (LOCAL->buf,ERROR); fclose (f); return NIL; /* burp fails for this file */ } /* burp out each old message */ for (set = &burp->set, wpos = 0; set; set = set->next) { /* move down this range */ for (rpos = set->first, size = set->last - set->first; size; size -= wsize) { if (rpos != wpos) { /* data to skip at start? */ /* no, slide this buffer down */ wsize = min (size,LOCAL->buflen); /* failure is not an option here */ while (fseek (f,rpos,SEEK_SET) || (fread (LOCAL->buf,1,wsize,f) != wsize)) { MM_NOTIFY (stream,strerror (errno),WARN); MM_DISKERROR (stream,errno,T); } /* nor here */ while (fseek (f,wpos,SEEK_SET)) { MM_NOTIFY (stream,strerror (errno),WARN); MM_DISKERROR (stream,errno,T); } /* and especially not here */ for (s = LOCAL->buf, wpending = wsize; wpending; wpending -= written) if (!(written = fwrite (LOCAL->buf,1,wpending,f))) { MM_NOTIFY (stream,strerror (errno),WARN); MM_DISKERROR (stream,errno,T); } } else wsize = size; /* nothing to skip, say we wrote it all */ rpos += wsize; wpos += wsize; } } while (fflush (f)) { /* failure also not an option here... */ MM_NOTIFY (stream,strerror (errno),WARN); MM_DISKERROR (stream,errno,T); } if (ftruncate (fd,wpos)) { /* flush cruft at end of file */ sprintf (LOCAL->buf,truncerr,burp->name,strerror (errno)); MM_LOG (LOCAL->buf,WARN); } else *reclaimed += rpos - wpos; ret = !fclose (f); /* close file */ /* slide down message positions in index */ for (i = 1,rpos = 0; i <= stream->nmsgs; ++i) if ((elt = mail_elt (stream,i))->private.spare.data == burp->fileno) { elt->private.special.offset = rpos; rpos += elt->private.msg.header.offset + elt->rfc822_size; } /* debugging */ if (rpos != wpos) fatal ("burp size consistency check!"); } return ret; } /* MIX burp sanity check to make sure not burping off end of file * Accepts: burp set * file size * file name * Returns: T if sane, NIL if insane */ long mix_burp_check (SEARCHSET *set,size_t size,char *file) { do if (set->last > size) { /* sanity check */ char tmp[MAILTMPLEN]; sprintf (tmp,"Unexpected short mix message file %.80s %lu < %lu", file,size,set->last); MM_LOG (tmp,ERROR); return NIL; /* don't burp this file at all */ } while (set = set->next); return LONGT; } /* MIX mail copy message(s) * Accepts: MAIL stream * sequence * destination mailbox * copy options * Returns: T if copy successful, else NIL */ long mix_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options) { FDDATA d; STRING st; char tmp[2*MAILTMPLEN]; long ret = mix_isvalid (mailbox,LOCAL->buf); mailproxycopy_t pc = (mailproxycopy_t) mail_parameters (stream,GET_MAILPROXYCOPY,NIL); MAILSTREAM *astream = NIL; FILE *idxf = NIL; FILE *msgf = NIL; FILE *statf = NIL; if (!ret) switch (errno) { /* make sure valid mailbox */ case NIL: /* no error in stat() */ if (pc) return (*pc) (stream,sequence,mailbox,options); sprintf (tmp,"Not a MIX-format mailbox: %.80s",mailbox); MM_LOG (tmp,ERROR); break; default: /* some stat() error */ MM_NOTIFY (stream,"[TRYCREATE] Must create mailbox before copy",NIL); break; } /* get sequence to copy */ else if (!(ret = ((options & CP_UID) ? mail_uid_sequence (stream,sequence) : mail_sequence (stream,sequence)))); /* acquire stream to append */ else if (ret = ((astream = mail_open (NIL,mailbox,OP_SILENT)) && !astream->rdonly && (((MIXLOCAL *) astream->local)->expok = T) && (statf = mix_parse (astream,&idxf,LONGT,NIL))) ? LONGT : NIL) { int fd; unsigned long i; MESSAGECACHE *elt; unsigned long newsize,hdrsize,size; MIXLOCAL *local = (MIXLOCAL *) astream->local; unsigned long seq = mix_modseq (local->metaseq); /* make sure new modseq fits */ if (local->indexseq > seq) seq = local->indexseq + 1; if (local->statusseq > seq) seq = local->statusseq + 1; /* calculate size of per-message header */ sprintf (local->buf,MSRFMT,MSGTOK,0,0,0,0,0,0,0,'+',0,0,0); hdrsize = strlen (local->buf); MM_CRITICAL (stream); /* go critical */ astream->silent = T; /* no events here */ /* calculate size that will be added */ for (i = 1, newsize = 0; i <= stream->nmsgs; ++i) if ((elt = mail_elt (stream,i))->sequence) newsize += hdrsize + elt->rfc822_size; /* open data file */ if (msgf = mix_data_open (astream,&fd,&size,newsize)) { char *t; unsigned long j,uid,uidv; copyuid_t cu = (copyuid_t) mail_parameters (NIL,GET_COPYUID,NIL); SEARCHSET *source = cu ? mail_newsearchset () : NIL; SEARCHSET *dest = cu ? mail_newsearchset () : NIL; for (i = 1,uid = uidv = 0; ret && (i <= stream->nmsgs); ++i) if (((elt = mail_elt (stream,i))->sequence) && elt->rfc822_size) { /* is message in current message file? */ if ((LOCAL->msgfd < 0) || (elt->private.spare.data != LOCAL->curmsg)) { if (LOCAL->msgfd >= 0) close (LOCAL->msgfd); if ((LOCAL->msgfd = open (mix_file_data (LOCAL->buf, stream->mailbox, elt->private.spare.data), O_RDONLY,NIL)) >= 0) LOCAL->curmsg = elt->private.spare.data; } if (LOCAL->msgfd < 0) ret = NIL; else { /* got file */ d.fd = LOCAL->msgfd;/* set up file descriptor */ /* start of message */ d.pos = elt->private.special.offset + elt->private.msg.header.offset; d.chunk = LOCAL->buf; d.chunksize = CHUNKSIZE; INIT (&st,fd_string,&d,elt->rfc822_size); /* init flag string */ tmp[0] = tmp[1] = '\0'; if (j = elt->user_flags) do if ((t = stream->user_flags[find_rightmost_bit (&j)]) && *t) strcat (strcat (tmp," "),t); while (j); if (elt->seen) strcat (tmp," \\Seen"); if (elt->deleted) strcat (tmp," \\Deleted"); if (elt->flagged) strcat (tmp," \\Flagged"); if (elt->answered) strcat (tmp," \\Answered"); if (elt->draft) strcat (tmp," \\Draft"); tmp[0] = '('; /* wrap list */ strcat (tmp,")"); /* if append OK, add to source set */ if ((ret = mix_append_msg (astream,msgf,tmp,elt,&st,dest, seq)) && source) mail_append_set (source,mail_uid (stream,i)); } } /* finish write if success */ if (ret && (ret = !fflush (msgf))) { fclose (msgf); /* all good, close the msg file now */ /* write new metadata, index, and status */ local->metaseq = local->indexseq = local->statusseq = seq; if (ret = (mix_meta_update (astream) && mix_index_update (astream,idxf,LONGT))) { /* success, delete if doing a move */ if (options & CP_MOVE) for (i = 1; i <= stream->nmsgs; i++) if ((elt = mail_elt (stream,i))->sequence) { elt->deleted = T; if (!stream->rdonly) elt->private.mod = LOCAL->statusseq = seq; MM_FLAGS (stream,elt->msgno); } /* done with status file now */ mix_status_update (astream,statf,LONGT); /* return sets if doing COPYUID */ if (cu) (*cu) (stream,mailbox,astream->uid_validity,source,dest); source = dest = NIL; /* don't free these sets now */ } } else { /* error */ if (errno) { /* output error message if system call error */ sprintf (tmp,"Message copy failed: %.80s",strerror (errno)); MM_LOG (tmp,ERROR); } ftruncate (fd,size); /* revert file */ close (fd); /* make sure that fclose doesn't corrupt us */ fclose (msgf); /* free the stdio resources */ } /* flush any sets remaining */ mail_free_searchset (&source); mail_free_searchset (&dest); } else { /* message file open failed */ sprintf (tmp,"Error opening copy message file: %.80s", strerror (errno)); MM_LOG (tmp,ERROR); ret = NIL; } MM_NOCRITICAL (stream); } else MM_LOG ("Can't open copy mailbox",ERROR); if (statf) fclose (statf); /* close status if still open */ if (idxf) fclose (idxf); /* close index if still open */ /* finished with append stream */ if (astream) mail_close (astream); return ret; /* return state */ } /* MIX mail append message from stringstruct * Accepts: MAIL stream * destination mailbox * append callback * data for callback * Returns: T if append successful, else NIL */ long mix_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data) { STRING *message; char *flags,*date,tmp[MAILTMPLEN]; /* N.B.: can't use LOCAL->buf for tmp */ long ret = mix_isvalid (mailbox,tmp); /* default stream to prototype */ if (!stream) stream = user_flags (&mixproto); if (!ret) switch (errno) { /* if not valid mailbox */ case ENOENT: /* no such file? */ if (ret = compare_cstring (mailbox,"INBOX") ? NIL : mix_create (NIL,"INBOX")) break; MM_NOTIFY (stream,"[TRYCREATE] Must create mailbox before append",NIL); break; default: sprintf (tmp,"Not a MIX-format mailbox: %.80s",mailbox); MM_LOG (tmp,ERROR); break; } /* get first message */ if (ret && MM_APPEND (af) (stream,data,&flags,&date,&message)) { MAILSTREAM *astream; FILE *idxf = NIL; FILE *msgf = NIL; FILE *statf = NIL; if (ret = ((astream = mail_open (NIL,mailbox,OP_SILENT)) && !astream->rdonly && (((MIXLOCAL *) astream->local)->expok = T) && (statf = mix_parse (astream,&idxf,LONGT,NIL))) ? LONGT : NIL) { int fd; unsigned long size,hdrsize; MESSAGECACHE elt; MIXLOCAL *local = (MIXLOCAL *) astream->local; unsigned long seq = mix_modseq (local->metaseq); /* make sure new modseq fits */ if (local->indexseq > seq) seq = local->indexseq + 1; if (local->statusseq > seq) seq = local->statusseq + 1; /* calculate size of per-message header */ sprintf (local->buf,MSRFMT,MSGTOK,0,0,0,0,0,0,0,'+',0,0,0); hdrsize = strlen (local->buf); MM_CRITICAL (astream); /* go critical */ astream->silent = T; /* no events here */ /* open data file */ if (msgf = mix_data_open (astream,&fd,&size,hdrsize + SIZE (message))) { appenduid_t au = (appenduid_t) mail_parameters (NIL,GET_APPENDUID,NIL); SEARCHSET *dst = au ? mail_newsearchset () : NIL; while (ret && message) {/* while good to go and have messages */ errno = NIL; /* in case one of these causes failure */ /* guard against zero-length */ if (!(ret = SIZE (message))) MM_LOG ("Append of zero-length message",ERROR); else if (date && !(ret = mail_parse_date (&elt,date))) { sprintf (tmp,"Bad date in append: %.80s",date); MM_LOG (tmp,ERROR); } else { if (!date) { /* if date not specified, use now */ internal_date (tmp); mail_parse_date (&elt,tmp); } ret = mix_append_msg (astream,msgf,flags,&elt,message,dst,seq) && MM_APPEND (af) (stream,data,&flags,&date,&message); } } /* finish write if success */ if (ret && (ret = !fflush (msgf))) { fclose (msgf); /* all good, close the msg file now */ /* write new metadata, index, and status */ local->metaseq = local->indexseq = local->statusseq = seq; if ((ret = (mix_meta_update (astream) && mix_index_update (astream,idxf,LONGT) && mix_status_update (astream,statf,LONGT))) && au) { (*au) (mailbox,astream->uid_validity,dst); dst = NIL; /* don't free this set now */ } } else { /* failure */ if (errno) { /* output error message if system call error */ sprintf (tmp,"Message append failed: %.80s",strerror (errno)); MM_LOG (tmp,ERROR); } ftruncate (fd,size); /* revert all writes to file*/ close (fd); /* make sure that fclose doesn't corrupt us */ fclose (msgf); /* free the stdio resources */ } /* flush any set remaining */ mail_free_searchset (&dst); } else { /* message file open failed */ sprintf (tmp,"Error opening append message file: %.80s", strerror (errno)); MM_LOG (tmp,ERROR); ret = NIL; } MM_NOCRITICAL (astream); /* release critical */ } else MM_LOG ("Can't open append mailbox",ERROR); if (statf) fclose (statf); /* close status if still open */ if (idxf) fclose (idxf); /* close index if still open */ if (astream) mail_close (astream); } return ret; } /* MIX mail append single message * Accepts: MAIL stream * flags for new message if non-NIL * elt with source date if non-NIL * stringstruct of message text * searchset to place UID * modseq of message * Returns: T if success, NIL if failure */ long mix_append_msg (MAILSTREAM *stream,FILE *f,char *flags,MESSAGECACHE *delt, STRING *msg,SEARCHSET *set,unsigned long seq) { MESSAGECACHE *elt; int c,cs; unsigned long i,j,k,uf,hoff; long sf; stream->kwd_create = NIL; /* don't copy unknown keywords */ sf = mail_parse_flags (stream,flags,&uf); /* swell the cache */ mail_exists (stream,++stream->nmsgs); /* assign new UID from metadata */ (elt = mail_elt (stream,stream->nmsgs))->private.uid = ++stream->uid_last; elt->private.mod = seq; /* set requested modseq in status */ elt->rfc822_size = SIZE (msg);/* copy message size and date to index */ elt->year = delt->year; elt->month = delt->month; elt->day = delt->day; elt->hours = delt->hours; elt->minutes = delt->minutes; elt->seconds = delt->seconds; elt->zoccident = delt->zoccident; elt->zhours = delt->zhours; elt->zminutes = delt->zminutes; /* * Do NOT set elt->valid here! mix_status_update() uses it to determine * whether a message should be marked as old. */ if (sf&fSEEN) elt->seen = T; /* copy flags to status */ if (sf&fDELETED) elt->deleted = T; if (sf&fFLAGGED) elt->flagged = T; if (sf&fANSWERED) elt->answered = T; if (sf&fDRAFT) elt->draft = T; elt->user_flags |= uf; /* message is in new message file */ elt->private.spare.data = LOCAL->newmsg; /* offset to message internal header */ elt->private.special.offset = ftell (f); /* build header for message */ fprintf (f,MSRFMT,MSGTOK,elt->private.uid, elt->year + BASEYEAR,elt->month,elt->day, elt->hours,elt->minutes,elt->seconds, elt->zoccident ? '-' : '+',elt->zhours,elt->zminutes, elt->rfc822_size); /* offset to header from internal header */ elt->private.msg.header.offset = ftell (f) - elt->private.special.offset; for (cs = 0; SIZE (msg); ) { /* copy message */ if (elt->private.msg.header.text.size) { if (msg->cursize) /* blat entire chunk if have it */ for (j = msg->cursize; j; j -= k) if (!(k = fwrite (msg->curpos,1,j,f))) return NIL; SETPOS (msg,GETPOS (msg) + msg->cursize); } else { /* still searching for delimiter */ c = 0xff & SNX (msg); /* get source character */ if (putc (c,f) == EOF) return NIL; switch (cs) { /* decide what to do based on state */ case 0: /* previous char ordinary */ if (c == '\015') cs = 1;/* advance if CR */ break; case 1: /* previous CR, advance if LF */ cs = (c == '\012') ? 2 : 0; break; case 2: /* previous CRLF, advance if CR */ cs = (c == '\015') ? 3 : 0; break; case 3: /* previous CRLFCR, done if LF */ if (c == '\012') elt->private.msg.header.text.size = elt->rfc822_size - SIZE (msg); cs = 0; /* reset mechanism */ break; } } } /* if no delimiter, header is entire msg */ if (!elt->private.msg.header.text.size) elt->private.msg.header.text.size = elt->rfc822_size; /* add this message to set */ mail_append_set (set,elt->private.uid); return LONGT; /* success */ } /* MIX mail read metadata, index, and status * Accepts: MAIL stream * returned index file * index file flags (non-NIL if want to add/remove messages) * status file flags (non-NIL if want to update elt->valid and old) * Returns: open status file, or NIL if failure * * Note that this routine can return an open index file even if it fails! */ static char *shortmsg = "message %lu (UID=%.08lx) truncated by %lu byte(s) (%lu < %lu)"; FILE *mix_parse (MAILSTREAM *stream,FILE **idxf,long iflags,long sflags) { int fd; unsigned long i; char *s,*t; struct stat sbuf; FILE *statf = NIL; short metarepairneeded = 0; short indexrepairneeded = 0; short silent = stream->silent; *idxf = NIL; /* in case error */ /* readonly means no updates */ if (stream->rdonly) iflags = sflags = NIL; /* open index file */ if ((fd = open (LOCAL->index,iflags ? O_RDWR : O_RDONLY,NIL)) < 0) MM_LOG ("Error opening mix index file",ERROR); /* acquire exclusive access and FILE */ else if (!flock (fd,iflags ? LOCK_EX : LOCK_SH) && !(*idxf = fdopen (fd,iflags ? "r+b" : "rb"))) { MM_LOG ("Error obtaining stream on mix index file",ERROR); flock (fd,LOCK_UN); /* relinquish lock */ close (fd); } /* slurp metadata */ else if (s = mix_meta_slurp (stream,&i)) { unsigned long j = 0; /* non-zero if UIDVALIDITY/UIDLAST changed */ if (i != LOCAL->metaseq) { /* metadata changed? */ char *t,*k; LOCAL->metaseq = i; /* note new metadata sequence */ while (s && *s) { /* parse entire metadata file */ /* locate end of line */ if (s = strstr (t = s,"\015\012")) { *s = '\0'; /* tie off line */ s += 2; /* skip past CRLF */ switch (*t++) { /* parse line */ case 'V': /* UIDVALIDITY */ if (!isxdigit (*t) || !(i = strtoul (t,&t,16))) { MM_LOG ("Error in mix metadata file UIDVALIDITY record",ERROR); return NIL; /* give up */ } if (i != stream->uid_validity) j = stream->uid_validity = i; break; case 'L': /* new UIDLAST */ if (!isxdigit (*t)) { MM_LOG ("Error in mix metadata file UIDLAST record",ERROR); return NIL; /* give up */ } if ((i = strtoul (t,&t,16)) != stream->uid_last) j = stream->uid_last = i; break; case 'N': /* new message file */ if (!isxdigit (*t)) { MM_LOG ("Error in mix metadata file new msg record",ERROR); return NIL; /* give up */ } if ((i = strtoul (t,&t,16)) != stream->uid_last) LOCAL->newmsg = i; break; case 'K': /* new keyword list */ for (i = 0; t && *t && (i < NUSERFLAGS); ++i) { if (t = strchr (k = t,' ')) *t++ = '\0'; /* make sure keyword non-empty */ if (*k && (strlen (k) <= MAXUSERFLAG)) { /* in case value changes (shouldn't happen) */ if (stream->user_flags[i] && strcmp (stream->user_flags[i],k)){ char tmp[MAILTMPLEN]; sprintf (tmp,"flag rename old=%.80s new=%.80s", stream->user_flags[i],k); MM_LOG (tmp,WARN); fs_give ((void **) &stream->user_flags[i]); } if (!stream->user_flags[i]) stream->user_flags[i] = cpystr (k); } else break; /* empty keyword */ } if ((i < NUSERFLAGS) && stream->user_flags[i]) { MM_LOG ("Error in mix metadata file keyword record",ERROR); return NIL; /* give up */ } else if (i == NUSERFLAGS) stream->kwd_create = NIL; break; } } if (t && *t) { /* junk in line */ MM_LOG ("Error in mix metadata record",ERROR); return NIL; /* give up */ } } } /* get sequence */ if (!(i = mix_read_sequence (*idxf)) || (i < LOCAL->indexseq)) { MM_LOG ("Error in mix index file sequence record",ERROR); return NIL; /* give up */ } /* sequence changed from last time? */ else if (j || (i > LOCAL->indexseq)) { unsigned long uid,nmsgs,curfile,curfilesize,curpos; char *t,*msg,tmp[MAILTMPLEN]; /* start with no messages */ curfile = curfilesize = curpos = nmsgs = 0; /* update sequence iff expunging OK */ if (LOCAL->expok) LOCAL->indexseq = i; /* get first elt */ while ((s = mix_read_record (*idxf,LOCAL->buf,LOCAL->buflen,"index")) && *s) switch (*s) { case ':': /* message record */ if (!(isxdigit (*++s) && (uid = strtoul (s,&t,16)))) msg = "UID"; else if (!((*t++ == ':') && isdigit (*t) && isdigit (t[1]) && isdigit (t[2]) && isdigit (t[3]) && isdigit (t[4]) && isdigit (t[5]) && isdigit (t[6]) && isdigit (t[7]) && isdigit (t[8]) && isdigit (t[9]) && isdigit (t[10]) && isdigit (t[11]) && isdigit (t[12]) && isdigit (t[13]) && ((t[14] == '+') || (t[14] == '-')) && isdigit (t[15]) && isdigit (t[16]) && isdigit (t[17]) && isdigit (t[18]))) msg = "internaldate"; else if ((*(s = t+19) != ':') || !isxdigit (*++s)) msg = "size"; else { unsigned int y = (((*t - '0') * 1000) + ((t[1] - '0') * 100) + ((t[2] - '0') * 10) + t[3] - '0') - BASEYEAR; unsigned int m = ((t[4] - '0') * 10) + t[5] - '0'; unsigned int d = ((t[6] - '0') * 10) + t[7] - '0'; unsigned int hh = ((t[8] - '0') * 10) + t[9] - '0'; unsigned int mm = ((t[10] - '0') * 10) + t[11] - '0'; unsigned int ss = ((t[12] - '0') * 10) + t[13] - '0'; unsigned int z = (t[14] == '-') ? 1 : 0; unsigned int zh = ((t[15] - '0') * 10) + t[16] - '0'; unsigned int zm = ((t[17] - '0') * 10) + t[18] - '0'; unsigned long size = strtoul (s,&s,16); if ((*s++ == ':') && isxdigit (*s)) { unsigned long file = strtoul (s,&s,16); if ((*s++ == ':') && isxdigit (*s)) { unsigned long pos = strtoul (s,&s,16); if ((*s++ == ':') && isxdigit (*s)) { unsigned long hpos = strtoul (s,&s,16); if ((*s++ == ':') && isxdigit (*s)) { unsigned long hsiz = strtoul (s,&s,16); if (uid > stream->uid_last) { sprintf (tmp,"mix index invalid UID (%08lx < %08lx)", uid,stream->uid_last); if (stream->rdonly) { MM_LOG (tmp,ERROR); return NIL; } strcat (tmp,", repaired"); MM_LOG (tmp,WARN); stream->uid_last = uid; metarepairneeded = T; } /* ignore expansion values */ if (*s++ == ':') { MESSAGECACHE *elt; ++nmsgs; /* this is another mesage */ /* within current known range of messages? */ while (nmsgs <= stream->nmsgs) { /* yes, get corresponding elt */ elt = mail_elt (stream,nmsgs); /* existing message with matching data? */ if (uid == elt->private.uid) { /* beware of Dracula's resurrection */ if (elt->private.ghost) { sprintf (tmp,"mix index data unexpunged UID: %lx", uid); MM_LOG (tmp,ERROR); return NIL; } /* also of static data changing */ if ((size != elt->rfc822_size) || (file != elt->private.spare.data) || (pos != elt->private.special.offset) || (hpos != elt->private.msg.header.offset) || (hsiz != elt->private.msg.header.text.size) || (y != elt->year) || (m != elt->month) || (d != elt->day) || (hh != elt->hours) || (mm != elt->minutes) || (ss != elt->seconds) || (z != elt->zoccident) || (zh != elt->zhours) || (zm != elt->zminutes)) { sprintf (tmp,"mix index data mismatch: %lx",uid); MM_LOG (tmp,ERROR); return NIL; } break; } /* existing msg with lower UID is expunged */ else if (uid > elt->private.uid) { if (LOCAL->expok) mail_expunged (stream,nmsgs); else {/* message expunged, but not yet for us */ ++nmsgs; elt->private.ghost = T; } } else { /* unexpected message record */ sprintf (tmp,"mix index UID mismatch (%lx < %lx)", uid,elt->private.uid); MM_LOG (tmp,ERROR); return NIL; } } /* time to create a new message? */ if (nmsgs > stream->nmsgs) { /* defer announcing until later */ stream->silent = T; mail_exists (stream,nmsgs); stream->silent = silent; (elt = mail_elt (stream,nmsgs))->recent = T; elt->private.uid = uid; elt->rfc822_size = size; elt->private.spare.data = file; elt->private.special.offset = pos; elt->private.msg.header.offset = hpos; elt->private.msg.header.text.size = hsiz; elt->year = y; elt->month = m; elt->day = d; elt->hours = hh; elt->minutes = mm; elt->seconds = ss; elt->zoccident = z; elt->zhours = zh; elt->zminutes = zm; /* message in same file? */ if (curfile == file) { if (pos < curpos) { MESSAGECACHE *plt = mail_elt (stream,elt->msgno-1); /* uh-oh, calculate delta? */ i = curpos - pos; sprintf (tmp,shortmsg,plt->msgno,plt->private.uid, i,pos,curpos); /* possible to fix? */ if (!stream->rdonly && LOCAL->expok && (i < plt->rfc822_size)) { plt->rfc822_size -= i; if (plt->rfc822_size < plt->private.msg.header.text.size) plt->private.msg.header.text.size = plt->rfc822_size; strcat (tmp,", repaired"); indexrepairneeded = T; } MM_LOG (tmp,WARN); } } else { /* new file, restart */ if (stat (mix_file_data (LOCAL->buf,stream->mailbox, curfile = file),&sbuf)) { sprintf (tmp,"Missing mix data file: %.500s", LOCAL->buf); MM_LOG (tmp,ERROR); return NIL; } curfile = file; curfilesize = sbuf.st_size; } /* position of message in file */ curpos = pos + elt->private.msg.header.offset + elt->rfc822_size; /* short file? */ if (curfilesize < curpos) { /* uh-oh, calculate delta? */ i = curpos - curfilesize; sprintf (tmp,shortmsg,elt->msgno,elt->private.uid, i,curfilesize,curpos); /* possible to fix? */ if (!stream->rdonly && LOCAL->expok && (i < elt->rfc822_size)) { elt->rfc822_size -= i; if (elt->rfc822_size < elt->private.msg.header.text.size) elt->private.msg.header.text.size = elt->rfc822_size; strcat (tmp,", repaired"); indexrepairneeded = T; } MM_LOG (tmp,WARN); } } break; } else msg = "expansion"; } else msg = "header size"; } else msg = "header position"; } else msg = "message position"; } else msg = "file#"; } sprintf (tmp,"Error in %s in mix index file: %.500s",msg,s); MM_LOG (tmp,ERROR); return NIL; default: sprintf (tmp,"Unknown record in mix index file: %.500s",s); MM_LOG (tmp,ERROR); return NIL; } if (!s) return NIL; /* barfage from mix_read_record() */ /* expunge trailing messages not in index */ if (LOCAL->expok) while (nmsgs < stream->nmsgs) mail_expunged (stream,stream->nmsgs); } /* repair metadata and index if needed */ if ((metarepairneeded ? mix_meta_update (stream) : T) && (indexrepairneeded ? mix_index_update (stream,*idxf,NIL) : T)) { MESSAGECACHE *elt; int fd; unsigned long uid,uf,sf,mod; char *s; int updatep = NIL; /* open status file */ if ((fd = open (LOCAL->status, stream->rdonly ? O_RDONLY : O_RDWR,NIL)) < 0) MM_LOG ("Error opening mix status file",ERROR); /* acquire exclusive access and FILE */ else if (!flock (fd,stream->rdonly ? LOCK_SH : LOCK_EX) && !(statf = fdopen (fd,stream->rdonly ? "rb" : "r+b"))) { MM_LOG ("Error obtaining stream on mix status file",ERROR); flock (fd,LOCK_UN); /* relinquish lock */ close (fd); } /* get sequence */ else if (!(i = mix_read_sequence (statf)) || ((i < LOCAL->statusseq) && stream->nmsgs && (i != 1))) { sprintf (LOCAL->buf, "Error in mix status sequence record, i=%lx, seq=%lx", i,LOCAL->statusseq); MM_LOG (LOCAL->buf,ERROR); } /* sequence changed from last time? */ else if (i != LOCAL->statusseq) { /* update sequence, get first elt */ if (i > LOCAL->statusseq) LOCAL->statusseq = i; if (stream->nmsgs) { elt = mail_elt (stream,i = 1); /* read message records */ while ((t = s = mix_read_record (statf,LOCAL->buf,LOCAL->buflen, "status")) && *s && (*s++ == ':') && isxdigit (*s)) { uid = strtoul (s,&s,16); if ((*s++ == ':') && isxdigit (*s)) { uf = strtoul (s,&s,16); if ((*s++ == ':') && isxdigit (*s)) { sf = strtoul (s,&s,16); if ((*s++ == ':') && isxdigit (*s)) { mod = strtoul (s,&s,16); /* ignore expansion values */ if (*s++ == ':') { /* need to move ahead to next elt? */ while ((uid > elt->private.uid) && (i < stream->nmsgs)) elt = mail_elt (stream,++i); /* update elt if altered */ if ((uid == elt->private.uid) && (!elt->valid || (mod != elt->private.mod))) { elt->user_flags = uf; elt->private.mod = mod; elt->seen = (sf & fSEEN) ? T : NIL; elt->deleted = (sf & fDELETED) ? T : NIL; elt->flagged = (sf & fFLAGGED) ? T : NIL; elt->answered = (sf & fANSWERED) ? T : NIL; elt->draft = (sf & fDRAFT) ? T : NIL; /* announce if altered existing message */ if (elt->valid) MM_FLAGS (stream,elt->msgno); /* first time, is old message? */ else if (sf & fOLD) { /* yes, clear recent and set valid */ elt->recent = NIL; elt->valid = T; } /* recent, allowed to update its status? */ else if (sflags) { /* yes, set valid and check in status */ elt->valid = T; elt->private.mod = mix_modseq (elt->private.mod); updatep = T; } /* leave valid unset and recent if sflags not set */ } continue; /* everything looks good */ } } } } break; /* error somewhere */ } if (t && *t) { /* non-null means bogus record */ char msg[MAILTMPLEN]; sprintf (msg,"Error in mix status file message record%s: %.80s", stream->rdonly ? "" : ", fixing",t); MM_LOG (msg,WARN); /* update it if not readonly */ if (!stream->rdonly) updatep = T; } if (updatep) { /* need to update? */ LOCAL->statusseq = mix_modseq (LOCAL->statusseq); mix_status_update (stream,statf,LONGT); } } } } } if (statf) { /* still happy? */ unsigned long j; stream->silent = silent; /* now notify upper level */ mail_exists (stream,stream->nmsgs); for (i = 1, j = 0; i <= stream->nmsgs; ++i) if (mail_elt (stream,i)->recent) ++j; mail_recent (stream,j); } return statf; } /* MIX metadata file routines */ /* MIX read metadata * Accepts: MAIL stream * return pointer for modseq * Returns: pointer to metadata after modseq or NIL if failure */ char *mix_meta_slurp (MAILSTREAM *stream,unsigned long *seq) { struct stat sbuf; char *s; char *ret = NIL; if (fstat (LOCAL->mfd,&sbuf)) MM_LOG ("Error obtaining size of mix metatdata file",ERROR); if (sbuf.st_size > LOCAL->buflen) { /* should be just a few dozen bytes */ if (sbuf.st_size > METAMAX) fatal ("absurd mix metadata file size"); fs_give ((void **) &LOCAL->buf); LOCAL->buf = (char *) fs_get ((LOCAL->buflen = sbuf.st_size) + 1); } /* read current metadata file */ LOCAL->buf[sbuf.st_size] = '\0'; if (lseek (LOCAL->mfd,0,L_SET) || (read (LOCAL->mfd,s = LOCAL->buf,sbuf.st_size) != sbuf.st_size)) MM_LOG ("Error reading mix metadata file",ERROR); else if ((*s != 'S') || !isxdigit (s[1]) || ((*seq = strtoul (s+1,&s,16)) < LOCAL->metaseq) || (*s++ != '\015') || (*s++ != '\012')) MM_LOG ("Error in mix metadata file sequence record",ERROR); else ret = s; return ret; } /* MIX update metadata * Accepts: MAIL stream * Returns: T on success, NIL if error * * Index MUST be locked!! */ long mix_meta_update (MAILSTREAM *stream) { long ret; /* do nothing if stream readonly */ if (stream->rdonly) ret = LONGT; else { unsigned char c,*s,*ss,*t; unsigned long i; /* The worst-case metadata is limited to: * 4 * (1 + 8 + 2) + (NUSERFLAGS * (MAXUSERFLAG + 1)) * which comes out to 1994 octets. This is much smaller than the normal * CHUNKSIZE definition of 64K, and CHUNKSIZE is the smallest size of * LOCAL->buf. * * If more stuff gets added to the metadata, or if you change the value * of NUSERFLAGS, MAXUSERFLAG or CHUNKSIZE, be sure to recalculate the * above assertation. */ sprintf (LOCAL->buf,SEQFMT,LOCAL->metaseq = mix_modseq (LOCAL->metaseq)); sprintf (LOCAL->buf + strlen (LOCAL->buf),MTAFMT, stream->uid_validity,stream->uid_last,LOCAL->newmsg); for (i = 0, c = 'K', s = ss = LOCAL->buf + strlen (LOCAL->buf); (i < NUSERFLAGS) && (t = stream->user_flags[i]); ++i) { if (!*t) fatal ("impossible empty keyword"); *s++ = c; /* write delimiter */ while (*t) *s++ = *t++; /* write keyword */ c = ' '; /* delimiter is now space */ } if (s != ss) { /* tie off keywords line */ *s++ = '\015'; *s++ = '\012'; } /* calculate length of metadata */ if ((i = s - LOCAL->buf) > LOCAL->buflen) fatal ("impossible buffer overflow"); lseek (LOCAL->mfd,0,L_SET); /* rewind file */ /* write new metadata */ ret = (write (LOCAL->mfd,LOCAL->buf,i) == i) ? LONGT : NIL; ftruncate (LOCAL->mfd,i); /* and tie off at that point */ } return ret; } /* MIX index file routines */ /* MIX update index * Accepts: MAIL stream * open FILE * expansion check flag * Returns: T on success, NIL if error */ long mix_index_update (MAILSTREAM *stream,FILE *idxf,long flag) { unsigned long i; long ret = LONGT; if (!stream->rdonly) { /* do nothing if stream readonly */ if (flag) { /* need to do expansion check? */ char tmp[MAILTMPLEN]; size_t size; struct stat sbuf; /* calculate file size we need */ for (i = 1, size = 0; i <= stream->nmsgs; ++i) if (!mail_elt (stream,i)->private.ghost) ++size; if (size) { /* Winston Smith's first dairy entry */ sprintf (tmp,IXRFMT,0,14,4,4,13,0,0,'+',0,0,0,0,0,0,0); size *= strlen (tmp); } /* calculate file size we need */ sprintf (tmp,SEQFMT,LOCAL->indexseq); size += strlen (tmp); /* get current file size */ if (fstat (fileno (idxf),&sbuf)) { MM_LOG ("Error getting size of mix index file",ERROR); ret = NIL; } /* need to write additional space? */ else if (sbuf.st_size < size) { void *buf = fs_get (size -= sbuf.st_size); memset (buf,0,size); if (fseek (idxf,0,SEEK_END) || (fwrite (buf,1,size,idxf) != size) || fflush (idxf)) { fseek (idxf,sbuf.st_size,SEEK_SET); ftruncate (fileno (idxf),sbuf.st_size); MM_LOG ("Error extending mix index file",ERROR); ret = NIL; } fs_give ((void **) &buf); } } if (ret) { /* if still good to go */ rewind (idxf); /* let's start at the very beginning */ /* write modseq first */ fprintf (idxf,SEQFMT,LOCAL->indexseq); /* then write all messages */ for (i = 1; ret && (i <= stream->nmsgs); i++) { MESSAGECACHE *elt = mail_elt (stream,i); if (!elt->private.ghost)/* only write living messages */ fprintf (idxf,IXRFMT,elt->private.uid, elt->year + BASEYEAR,elt->month,elt->day, elt->hours,elt->minutes,elt->seconds, elt->zoccident ? '-' : '+',elt->zhours,elt->zminutes, elt->rfc822_size,elt->private.spare.data, elt->private.special.offset, elt->private.msg.header.offset, elt->private.msg.header.text.size); if (ferror (idxf)) { MM_LOG ("Error updating mix index file",ERROR); ret = NIL; } } if (fflush (idxf)) { MM_LOG ("Error flushing mix index file",ERROR); ret = NIL; } if (ret) ftruncate (fileno (idxf),ftell (idxf)); } } return ret; } /* MIX status file routines */ /* MIX update status * Accepts: MAIL stream * pointer to open FILE * expansion check flag * Returns: T on success, NIL if error */ long mix_status_update (MAILSTREAM *stream,FILE *statf,long flag) { unsigned long i; char tmp[MAILTMPLEN]; long ret = LONGT; if (!stream->rdonly) { /* do nothing if stream readonly */ if (flag) { /* need to do expansion check? */ char tmp[MAILTMPLEN]; size_t size; struct stat sbuf; /* calculate file size we need */ for (i = 1, size = 0; i <= stream->nmsgs; ++i) if (!mail_elt (stream,i)->private.ghost) ++size; if (size) { /* number of living messages */ sprintf (tmp,STRFMT,0,0,0,0); size *= strlen (tmp); } sprintf (tmp,SEQFMT,LOCAL->statusseq); size += strlen (tmp); /* get current file size */ if (fstat (fileno (statf),&sbuf)) { MM_LOG ("Error getting size of mix status file",ERROR); ret = NIL; } /* need to write additional space? */ else if (sbuf.st_size < size) { void *buf = fs_get (size -= sbuf.st_size); memset (buf,0,size); if (fseek (statf,0,SEEK_END) || (fwrite (buf,1,size,statf) != size) || fflush (statf)) { fseek (statf,sbuf.st_size,SEEK_SET); ftruncate (fileno (statf),sbuf.st_size); MM_LOG ("Error extending mix status file",ERROR); ret = NIL; } fs_give ((void **) &buf); } } if (ret) { /* if still good to go */ rewind (statf); /* let's start at the very beginning */ /* write sequence */ fprintf (statf,SEQFMT,LOCAL->statusseq); /* write message status records */ for (i = 1; ret && (i <= stream->nmsgs); ++i) { MESSAGECACHE *elt = mail_elt (stream,i); /* make sure all messages have a modseq */ if (!elt->private.mod) elt->private.mod = LOCAL->statusseq; if (!elt->private.ghost)/* only write living messages */ fprintf (statf,STRFMT,elt->private.uid,elt->user_flags, (fSEEN * elt->seen) + (fDELETED * elt->deleted) + (fFLAGGED * elt->flagged) + (fANSWERED * elt->answered) + (fDRAFT * elt->draft) + (elt->valid ? fOLD : NIL), elt->private.mod); if (ferror (statf)) { sprintf (tmp,"Error updating mix status file: %.80s", strerror (errno)); MM_LOG (tmp,ERROR); ret = NIL; } } if (ret && fflush (statf)) { MM_LOG ("Error flushing mix status file",ERROR); ret = NIL; } if (ret) ftruncate (fileno (statf),ftell (statf)); } } return ret; } /* MIX data file routines */ /* MIX open data file * Accepts: MAIL stream * pointer to returned fd if success * pointer to returned size if success * size of new data to be added * Returns: open FILE, or NIL if failure * * The curend test assumes that the last message of the mailbox is the furthest * point that the current data file extends, and thus that is all that needs to * be tested for short file prevention. */ FILE *mix_data_open (MAILSTREAM *stream,int *fd,long *size, unsigned long newsize) { FILE *msgf = NIL; struct stat sbuf; MESSAGECACHE *elt = stream->nmsgs ? mail_elt (stream,stream->nmsgs) : NIL; unsigned long curend = (elt && (elt->private.spare.data == LOCAL->newmsg)) ? elt->private.special.offset + elt->private.msg.header.offset + elt->rfc822_size : 0; /* allow create if curend 0 */ if ((*fd = open (mix_file_data (LOCAL->buf,stream->mailbox,LOCAL->newmsg), O_RDWR | (curend ? NIL : O_CREAT),NIL)) >= 0) { fstat (*fd,&sbuf); /* get current file size */ /* can we use this file? */ if ((curend <= sbuf.st_size) && (!sbuf.st_size || ((sbuf.st_size + newsize) <= MIXDATAROLL))) *size = sbuf.st_size; /* yes, return current size */ else { /* short file or becoming too long */ if (curend > sbuf.st_size) { char tmp[MAILTMPLEN]; sprintf (tmp,"short mix message file %.08lx (%ld > %ld), rolling", LOCAL->newmsg,curend,sbuf.st_size); MM_LOG (tmp,WARN); /* shouldn't happen */ } close (*fd); /* roll to a new file */ while ((*fd = open (mix_file_data (LOCAL->buf,stream->mailbox, LOCAL->newmsg = mix_modseq (LOCAL->newmsg)), O_RDWR | O_CREAT | O_EXCL,sbuf.st_mode)) < 0); *size = 0; /* brand new file */ fchmod (*fd,sbuf.st_mode);/* with same mode as previous file */ } } if (*fd >= 0) { /* have a data file? */ /* yes, get stdio and set position */ if (msgf = fdopen (*fd,"r+b")) fseek (msgf,*size,SEEK_SET); else close (*fd); /* fdopen() failed? */ } return msgf; /* return results */ } /* MIX open sortcache * Accepts: MAIL stream * Returns: open FILE, or NIL if failure or could only get readonly sortcache */ FILE *mix_sortcache_open (MAILSTREAM *stream) { int fd,refwd; unsigned long i,uid,sentdate,fromlen,tolen,cclen,subjlen,msgidlen,reflen; char *s,*t,*msg,tmp[MAILTMPLEN]; MESSAGECACHE *elt; SORTCACHE *sc; STRINGLIST *sl; struct stat sbuf; int rdonly = NIL; FILE *srtcf = NIL; mailcache_t mc = (mailcache_t) mail_parameters (NIL,GET_CACHE,NIL); fstat (LOCAL->mfd,&sbuf); if (!stream->nmsgs); /* do nothing if mailbox empty */ /* open sortcache file */ else if (((fd = open (LOCAL->sortcache,O_RDWR|O_CREAT,sbuf.st_mode)) < 0) && !(rdonly = ((fd = open (LOCAL->sortcache,O_RDONLY,NIL)) >= 0))) MM_LOG ("Error opening mix sortcache file",WARN); /* acquire lock and FILE */ else if (!flock (fd,rdonly ? LOCK_SH : LOCK_EX) && !(srtcf = fdopen (fd,rdonly ? "rb" : "r+b"))) { MM_LOG ("Error obtaining stream on mix sortcache file",WARN); flock (fd,LOCK_UN); /* relinquish lock */ close (fd); } else if (!(i = mix_read_sequence (srtcf)) || (i < LOCAL->sortcacheseq)) MM_LOG ("Error in mix sortcache file sequence record",WARN); /* sequence changed from last time? */ else if (i > LOCAL->sortcacheseq) { LOCAL->sortcacheseq = i; /* update sequence */ while ((s = t = mix_read_record (srtcf,LOCAL->buf,LOCAL->buflen, "sortcache")) && *s && (msg = "uid") && (*s++ == ':') && isxdigit (*s)) { uid = strtoul (s,&s,16); if ((*s++ == ':') && isxdigit (*s)) { sentdate = strtoul (s,&s,16); if ((*s++ == ':') && isxdigit (*s)) { fromlen = strtoul (s,&s,16); if ((*s++ == ':') && isxdigit (*s)) { tolen = strtoul (s,&s,16); if ((*s++ == ':') && isxdigit (*s)) { cclen = strtoul (s,&s,16); if ((*s++ == ':') && ((*s == 'R') || (*s == ' ')) && isxdigit (s[1])) { refwd = (*s++ == 'R') ? T : NIL; subjlen = strtoul (s,&s,16); if ((*s++ == ':') && isxdigit (*s)) { msgidlen = strtoul (s,&s,16); if ((*s++ == ':') && isxdigit (*s)) { reflen = strtoul (s,&s,16); /* ignore expansion values */ if (*s++ == ':') { if (i = mail_msgno (stream,uid)) { sc = (SORTCACHE *) (*mc) (stream,i,CH_SORTCACHE); sc->size = (elt = mail_elt (stream,i))->rfc822_size; sc->date = sentdate; sc->arrival = elt->day ? mail_longdate (elt) : 1; if (refwd) sc->refwd = T; if (fromlen) { if (sc->from) fseek (srtcf,fromlen + 2,SEEK_CUR); else if ((getc (srtcf) != 'F') || (fread (sc->from = (char *) fs_get(fromlen), 1,fromlen-1,srtcf) != (fromlen-1))|| (sc->from[fromlen-1] = '\0') || (getc (srtcf) != '\015') || (getc (srtcf) != '\012')) { msg = "from data"; break; } } if (tolen) { if (sc->to) fseek (srtcf,tolen + 2,SEEK_CUR); else if ((getc (srtcf) != 'T') || (fread (sc->to = (char *) fs_get (tolen), 1,tolen-1,srtcf) != (tolen - 1)) || (sc->to[tolen-1] = '\0') || (getc (srtcf) != '\015') || (getc (srtcf) != '\012')) { msg = "to data"; break; } } if (cclen) { if (sc->cc) fseek (srtcf,cclen + 2,SEEK_CUR); else if ((getc (srtcf) != 'C') || (fread (sc->cc = (char *) fs_get (cclen), 1,cclen-1,srtcf) != (cclen - 1)) || (sc->cc[cclen-1] = '\0') || (getc (srtcf) != '\015') || (getc (srtcf) != '\012')) { msg = "cc data"; break; } } if (subjlen) { if (sc->subject) fseek (srtcf,subjlen + 2,SEEK_CUR); else if ((getc (srtcf) != 'S') || (fread (sc->subject = (char *) fs_get (subjlen),1, subjlen-1,srtcf) != (subjlen-1))|| (sc->subject[subjlen-1] = '\0') || (getc (srtcf) != '\015') || (getc (srtcf) != '\012')) { msg = "subject data"; break; } } if (msgidlen) { if (sc->message_id) fseek (srtcf,msgidlen + 2,SEEK_CUR); else if ((getc (srtcf) != 'M') || (fread (sc->message_id = (char *) fs_get (msgidlen),1, msgidlen-1,srtcf) != (msgidlen-1))|| (sc->message_id[msgidlen-1] = '\0') || (getc (srtcf) != '\015') || (getc (srtcf) != '\012')) { msg = "message-id data"; break; } } if (reflen) { if (sc->references) fseek(srtcf,reflen + 2,SEEK_CUR); /* make sure it fits */ else { if (reflen >= LOCAL->buflen) { fs_give ((void **) &LOCAL->buf); LOCAL->buf = (char *) fs_get ((LOCAL->buflen = reflen) + 1); } if ((getc (srtcf) != 'R') || (fread (LOCAL->buf,1,reflen-1,srtcf) != (reflen - 1)) || (LOCAL->buf[reflen-1] = '\0') || (getc (srtcf) != '\015') || (getc (srtcf) != '\012')) { msg = "references data"; break; } for (s = LOCAL->buf,sl = NIL, sc->references = mail_newstringlist (); s && *s; s += i + 1) { if ((i = strtoul (s,&s,16)) && (*s++ == ':') && (s[i] == ':')) { if (sl) sl = sl->next = mail_newstringlist(); else sl = sc->references; s[i] = '\0'; sl->text.data = cpystr (s); sl->text.size = i; } else s = NIL; } if (!s || *s || (s != ((char *) LOCAL->buf + reflen - 1))) { msg = "references length consistency check"; break; } } } } /* UID not found, ignore this message */ else fseek (srtcf,((fromlen ? fromlen + 2 : 0) + (tolen ? tolen + 2 : 0) + (cclen ? cclen + 2 : 0) + (subjlen ? subjlen + 2 : 0) + (msgidlen ? msgidlen + 2 : 0) + (reflen ? reflen + 2 : 0)), SEEK_CUR); continue; } else msg = "expansion"; } else msg = "references"; } else msg = "message-id"; } else msg = "subject"; } else msg = "cc"; } else msg = "to"; } else msg = "from"; } else msg = "sentdate"; break; /* error somewhere */ } if (!t || *t) { /* error detected? */ if (t) { /* non-null means bogus record */ sprintf (tmp,"Error in %s in mix sortcache record: %.500s",msg,t); MM_LOG (tmp,WARN); } fclose (srtcf); /* either way, must punt */ srtcf = NIL; } } if (rdonly && srtcf) { /* can't update if readonly */ unlink (LOCAL->sortcache); /* try deleting it */ fclose (srtcf); /* so close it and return as if error */ srtcf = NIL; } else fchmod (fd,sbuf.st_mode); return srtcf; } /* MIX update and close sortcache * Accepts: MAIL stream * pointer to open FILE (if FILE is NIL, do nothing) * Returns: T on success, NIL on error */ long mix_sortcache_update (MAILSTREAM *stream,FILE **sortcache) { FILE *f = *sortcache; long ret = LONGT; if (f) { /* ignore if no file */ unsigned long i,j; mailcache_t mc = (mailcache_t) mail_parameters (NIL,GET_CACHE,NIL); for (i = 1; (i <= stream->nmsgs) && !((SORTCACHE *) (*mc) (stream,i,CH_SORTCACHE))->dirty; ++i); if (i <= stream->nmsgs) { /* only update if some entry is dirty */ rewind (f); /* let's start at the very beginning */ /* write sequence */ fprintf (f,SEQFMT,LOCAL->sortcacheseq = mix_modseq(LOCAL->sortcacheseq)); for (i = 1; ret && (i <= stream->nmsgs); ++i) { MESSAGECACHE *elt = mail_elt (stream,i); SORTCACHE *s = (SORTCACHE *) (*mc) (stream,i,CH_SORTCACHE); STRINGLIST *sl; s->dirty = NIL; /* no longer dirty */ if (sl = s->references) /* count length of references */ for (j = 1; sl && sl->text.data; sl = sl->next) j += 10 + sl->text.size; else j = 0; /* no references yet */ fprintf (f,SCRFMT,elt->private.uid,s->date, s->from ? strlen (s->from) + 1 : 0, s->to ? strlen (s->to) + 1 : 0,s->cc ? strlen (s->cc) + 1 : 0, s->refwd ? 'R' : ' ',s->subject ? strlen (s->subject) + 1: 0, s->message_id ? strlen (s->message_id) + 1 : 0,j); if (s->from) fprintf (f,"F%s\015\012",s->from); if (s->to) fprintf (f,"T%s\015\012",s->to); if (s->cc) fprintf (f,"C%s\015\012",s->cc); if (s->subject) fprintf (f,"S%s\015\012",s->subject); if (s->message_id) fprintf (f,"M%s\015\012",s->message_id); if (j) { /* any references to write? */ fputc ('R',f); /* yes, do so */ for (sl = s->references; sl && sl->text.data; sl = sl->next) fprintf (f,"%08lx:%s:",sl->text.size,sl->text.data); fputs ("\015\012",f); } if (ferror (f)) { MM_LOG ("Error updating mix sortcache file",WARN); ret = NIL; } } if (ret && fflush (f)) { MM_LOG ("Error flushing mix sortcache file",WARN); ret = NIL; } if (ret) ftruncate (fileno (f),ftell (f)); } if (fclose (f)) { MM_LOG ("Error closing mix sortcache file",WARN); ret = NIL; } } return ret; } /* MIX generic file routines */ /* MIX read record * Accepts: open FILE * buffer * buffer length * record type * Returns: buffer if success, else NIL (zero-length buffer means EOF) */ char *mix_read_record (FILE *f,char *buf,unsigned long buflen,char *type) { char *s,tmp[MAILTMPLEN]; /* ensure string tied off */ buf[buflen-2] = buf[buflen-1] = '\0'; while (fgets (buf,buflen-1,f)) { if (s = strchr (buf,'\012')) { if ((s != buf) && (s[-1] == '\015')) --s; *s = '\0'; /* tie off buffer */ if (s != buf) return buf; /* return if non-empty buffer */ sprintf (tmp,"Empty mix %s record",type); MM_LOG (tmp,WARN); } else if (buf[buflen-2]) { /* overlong record is bad news */ sprintf (tmp,"Oversize mix %s record: %.512s",type,buf); MM_LOG (tmp,ERROR); return NIL; } else { sprintf (tmp,"Truncated mix %s record: %.512s",type,buf); MM_LOG (tmp,WARN); return buf; /* pass to caller anyway */ } } buf[0] = '\0'; /* return empty buffer on EOF */ return buf; } /* MIX read sequence record * Accepts: open FILE * Returns: sequence value, or NIL if failure */ unsigned long mix_read_sequence (FILE *f) { unsigned long ret; char *s,tmp[MAILTMPLEN]; if (!mix_read_record (f,tmp,MAILTMPLEN-1,"sequence")) return NIL; switch (tmp[0]) { /* examine record */ case '\0': /* end of file */ ret = 1; /* start a new sequence regime */ break; case 'S': /* sequence record */ if (isxdigit (tmp[1])) { /* must be followed by hex value */ ret = strtoul (tmp+1,&s,16); if (!*s) break; /* and nothing more */ } /* drop into default case */ default: /* anything else is an error */ return NIL; /* return error */ } return ret; } /* MIX internal routines */ /* MIX mail build directory name * Accepts: destination string * source * Returns: destination or empty string if error */ char *mix_dir (char *dst,char *name) { char *s; /* empty string if mailboxfile fails */ if (!mailboxfile (dst,name)) *dst = '\0'; /* driver-selected INBOX */ else if (!*dst) mailboxfile (dst,"~/INBOX"); /* tie off unnecessary trailing / */ else if ((s = strrchr (dst,'/')) && !s[1]) *s = '\0'; return dst; } /* MIX mail build file name * Accepts: destination string * directory name * file name * Returns: destination */ char *mix_file (char *dst,char *dir,char *name) { sprintf (dst,"%.500s/%.80s%.80s",dir,MIXNAME,name); return dst; } /* MIX mail build file name from data file number * Accepts: destination string * directory name * data file number * Returns: destination */ char *mix_file_data (char *dst,char *dir,unsigned long data) { char tmp[MAILTMPLEN]; if (data) sprintf (tmp,"%08lx",data); else tmp[0] = '\0'; /* compatibility with experimental version */ return mix_file (dst,dir,tmp); } /* MIX mail get new modseq * Accepts: old modseq * Returns: new modseq value */ unsigned long mix_modseq (unsigned long oldseq) { /* normally time now */ unsigned long ret = (unsigned long) time (NIL); /* ensure that modseq doesn't go backwards */ if (ret <= oldseq) ret = oldseq + 1; return ret; }