--- /dev/null
+/* ========================================================================
+ * Copyright 1988-2007 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: MTX mail routines
+ *
+ * Author: Mark Crispin
+ * Networks and Distributed Computing
+ * Computing & Communications
+ * University of Washington
+ * Administration Building, AG-44
+ * Seattle, WA 98195
+ * Internet: MRC@CAC.Washington.EDU
+ *
+ * Date: 22 May 1990
+ * Last Edited: 15 June 2007
+ */
+
+
+/* FILE TIME SEMANTICS
+ *
+ * The atime is the last read time of the file.
+ * The mtime is the last flags update time of the file.
+ * The ctime is the last write time of the file.
+ */
+
+#include <stdio.h>
+#include <ctype.h>
+#include <errno.h>
+extern int errno; /* just in case */
+#include "mail.h"
+#include "osdep.h"
+#include <fcntl.h>
+#include <time.h>
+#include <sys/stat.h>
+#include <sys/utime.h>
+#include "misc.h"
+#include "dummy.h"
+#include "fdstring.h"
+\f
+/* MTX I/O stream local data */
+
+typedef struct mtx_local {
+ unsigned int shouldcheck: 1; /* if ping should do a check instead */
+ unsigned int mustcheck: 1; /* if ping must do a check instead */
+ int fd; /* file descriptor for I/O */
+ off_t filesize; /* file size parsed */
+ time_t filetime; /* last file time */
+ time_t lastsnarf; /* last snarf time */
+ unsigned char *buf; /* temporary buffer */
+ unsigned long buflen; /* current size of temporary buffer */
+} MTXLOCAL;
+
+
+/* Convenient access to local data */
+
+#define LOCAL ((MTXLOCAL *) stream->local)
+
+
+/* Function prototypes */
+
+DRIVER *mtx_valid (char *name);
+int mtx_isvalid (char *name,char *file);
+void *mtx_parameters (long function,void *value);
+void mtx_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents);
+void mtx_list (MAILSTREAM *stream,char *ref,char *pat);
+void mtx_lsub (MAILSTREAM *stream,char *ref,char *pat);
+long mtx_create (MAILSTREAM *stream,char *mailbox);
+long mtx_delete (MAILSTREAM *stream,char *mailbox);
+long mtx_rename (MAILSTREAM *stream,char *old,char *newname);
+long mtx_status (MAILSTREAM *stream,char *mbx,long flags);
+MAILSTREAM *mtx_open (MAILSTREAM *stream);
+void mtx_close (MAILSTREAM *stream,long options);
+void mtx_flags (MAILSTREAM *stream,char *sequence,long flags);
+char *mtx_header (MAILSTREAM *stream,unsigned long msgno,
+ unsigned long *length,long flags);
+long mtx_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags);
+void mtx_flag (MAILSTREAM *stream,char *sequence,char *flag,long flags);
+void mtx_flagmsg (MAILSTREAM *stream,MESSAGECACHE *elt);
+long mtx_ping (MAILSTREAM *stream);
+void mtx_check (MAILSTREAM *stream);
+void mtx_snarf (MAILSTREAM *stream);
+long mtx_expunge (MAILSTREAM *stream,char *sequence,long options);
+long mtx_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options);
+long mtx_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data);
+
+long mtx_parse (MAILSTREAM *stream);
+MESSAGECACHE *mtx_elt (MAILSTREAM *stream,unsigned long msgno);
+void mtx_read_flags (MAILSTREAM *stream,MESSAGECACHE *elt);
+void mtx_update_status (MAILSTREAM *stream,unsigned long msgno,long syncflag);
+unsigned long mtx_hdrpos (MAILSTREAM *stream,unsigned long msgno,
+ unsigned long *size);
+
+\f
+/* MTX mail routines */
+
+
+/* Driver dispatch used by MAIL */
+
+DRIVER mtxdriver = {
+ "mtx", /* driver name */
+ /* driver flags */
+ DR_LOCAL|DR_MAIL|DR_CRLF|DR_NOSTICKY,
+ (DRIVER *) NIL, /* next driver */
+ mtx_valid, /* mailbox is valid for us */
+ mtx_parameters, /* manipulate parameters */
+ mtx_scan, /* scan mailboxes */
+ mtx_list, /* list mailboxes */
+ mtx_lsub, /* list subscribed mailboxes */
+ NIL, /* subscribe to mailbox */
+ NIL, /* unsubscribe from mailbox */
+ mtx_create, /* create mailbox */
+ mtx_delete, /* delete mailbox */
+ mtx_rename, /* rename mailbox */
+ mail_status_default, /* status of mailbox */
+ mtx_open, /* open mailbox */
+ mtx_close, /* close mailbox */
+ mtx_flags, /* fetch message "fast" attributes */
+ mtx_flags, /* fetch message flags */
+ NIL, /* fetch overview */
+ NIL, /* fetch message envelopes */
+ mtx_header, /* fetch message header */
+ mtx_text, /* fetch message body */
+ NIL, /* fetch partial message text */
+ NIL, /* unique identifier */
+ NIL, /* message number */
+ mtx_flag, /* modify flags */
+ mtx_flagmsg, /* per-message modify flags */
+ NIL, /* search for message based on criteria */
+ NIL, /* sort messages */
+ NIL, /* thread messages */
+ mtx_ping, /* ping mailbox to see if still alive */
+ mtx_check, /* check for new messages */
+ mtx_expunge, /* expunge deleted messages */
+ mtx_copy, /* copy messages to another mailbox */
+ mtx_append, /* append string message to mailbox */
+ NIL /* garbage collect stream */
+};
+
+ /* prototype stream */
+MAILSTREAM mtxproto = {&mtxdriver};
+\f
+/* MTX mail validate mailbox
+ * Accepts: mailbox name
+ * Returns: our driver if name is valid, NIL otherwise
+ */
+
+DRIVER *mtx_valid (char *name)
+{
+ char tmp[MAILTMPLEN];
+ return mtx_isvalid (name,tmp) ? &mtxdriver : NIL;
+}
+
+
+/* MTX mail test for valid mailbox
+ * Accepts: mailbox name
+ * buffer to return file name
+ * Returns: T if valid, NIL otherwise
+ */
+
+int mtx_isvalid (char *name,char *file)
+{
+ int fd;
+ int ret = NIL;
+ char *s,tmp[MAILTMPLEN];
+ struct stat sbuf;
+ struct utimbuf times;
+ errno = EINVAL; /* assume invalid argument */
+ /* if file, get its status */
+ if ((s = dummy_file (file,name)) && !stat (s,&sbuf) &&
+ ((sbuf.st_mode & S_IFMT) == S_IFREG)) {
+ if (!sbuf.st_size)errno = 0;/* empty file */
+ else if ((fd = open (file,O_BINARY|O_RDONLY,NIL)) >= 0) {
+ memset (tmp,'\0',MAILTMPLEN);
+ if ((read (fd,tmp,64) >= 0) && (s = strchr (tmp,'\015')) &&
+ (s[1] == '\012')) { /* valid format? */
+ *s = '\0'; /* tie off header */
+ /* must begin with dd-mmm-yy" */
+ ret = (((tmp[2] == '-' && tmp[6] == '-') ||
+ (tmp[1] == '-' && tmp[5] == '-')) &&
+ (s = strchr (tmp+18,',')) && strchr (s+2,';')) ? T : NIL;
+ }
+ else errno = -1; /* bogus format */
+ close (fd); /* close the file */
+ /* \Marked status? */
+ if (sbuf.st_ctime > sbuf.st_atime) {
+ /* preserve atime and mtime */
+ times.actime = sbuf.st_atime;
+ times.modtime = sbuf.st_mtime;
+ utime (file,×); /* set the times */
+ }
+ }
+ }
+ /* in case INBOX but not mtx format */
+ else if ((errno == ENOENT) && !compare_cstring (name,"INBOX")) errno = -1;
+ return ret; /* return what we should */
+}
+
+
+/* MTX manipulate driver parameters
+ * Accepts: function code
+ * function-dependent value
+ * Returns: function-dependent return value
+ */
+
+void *mtx_parameters (long function,void *value)
+{
+ return NIL;
+}
+\f
+/* MTX mail scan mailboxes
+ * Accepts: mail stream
+ * reference
+ * pattern to search
+ * string to scan
+ */
+
+void mtx_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents)
+{
+ if (stream) dummy_scan (NIL,ref,pat,contents);
+}
+
+
+/* MTX mail list mailboxes
+ * Accepts: mail stream
+ * reference
+ * pattern to search
+ */
+
+void mtx_list (MAILSTREAM *stream,char *ref,char *pat)
+{
+ if (stream) dummy_list (NIL,ref,pat);
+}
+
+
+/* MTX mail list subscribed mailboxes
+ * Accepts: mail stream
+ * reference
+ * pattern to search
+ */
+
+void mtx_lsub (MAILSTREAM *stream,char *ref,char *pat)
+{
+ if (stream) dummy_lsub (NIL,ref,pat);
+}
+\f
+/* MTX mail create mailbox
+ * Accepts: MAIL stream
+ * mailbox name to create
+ * Returns: T on success, NIL on failure
+ */
+
+long mtx_create (MAILSTREAM *stream,char *mailbox)
+{
+ char *s,mbx[MAILTMPLEN];
+ if (s = dummy_file (mbx,mailbox)) return dummy_create (stream,s);
+ sprintf (mbx,"Can't create %.80s: invalid name",mailbox);
+ mm_log (mbx,ERROR);
+ return NIL;
+}
+
+
+/* MTX mail delete mailbox
+ * Accepts: MAIL stream
+ * mailbox name to delete
+ * Returns: T on success, NIL on failure
+ */
+
+long mtx_delete (MAILSTREAM *stream,char *mailbox)
+{
+ return mtx_rename (stream,mailbox,NIL);
+}
+\f
+/* MTX mail rename mailbox
+ * Accepts: MAIL stream
+ * old mailbox name
+ * new mailbox name (or NIL for delete)
+ * Returns: T on success, NIL on failure
+ */
+
+long mtx_rename (MAILSTREAM *stream,char *old,char *newname)
+{
+ long ret = LONGT;
+ char c,*s,tmp[MAILTMPLEN],file[MAILTMPLEN],lock[MAILTMPLEN];
+ int fd,ld;
+ struct stat sbuf;
+ if (!dummy_file (file,old) ||
+ (newname && (!((s = mailboxfile (tmp,newname)) && *s) ||
+ ((s = strrchr (tmp,'\\')) && !s[1])))) {
+ sprintf (tmp,newname ?
+ "Can't rename mailbox %.80s to %.80s: invalid name" :
+ "Can't delete mailbox %.80s: invalid name",
+ old,newname);
+ mm_log (tmp,ERROR);
+ return NIL;
+ }
+ if ((fd = open (file,O_BINARY|O_RDWR,NIL)) < 0) {
+ sprintf (tmp,"Can't open mailbox %.80s: %s",old,strerror (errno));
+ mm_log (tmp,ERROR);
+ return NIL;
+ }
+ /* get exclusive parse/append permission */
+ if ((ld = lockname (lock,file,LOCK_EX)) < 0) {
+ mm_log ("Unable to lock rename mailbox",ERROR);
+ return NIL;
+ }
+ /* lock out other users */
+ if (flock (fd,LOCK_EX|LOCK_NB)) {
+ close (fd); /* couldn't lock, give up on it then */
+ sprintf (tmp,"Mailbox %.80s is in use by another process",old);
+ mm_log (tmp,ERROR);
+ unlockfd (ld,lock); /* release exclusive parse/append permission */
+ return NIL;
+ }
+\f
+ if (newname) { /* want rename? */
+ /* found superior to destination name? */
+ if ((s = strrchr (tmp,'\\')) && (s != tmp) &&
+ ((tmp[1] != ':') || (s != tmp + 2))) {
+ c = s[1]; /* remember character after delimiter */
+ *s = s[1] = '\0'; /* tie off name at delimiter */
+ /* name doesn't exist, create it */
+ if (stat (tmp,&sbuf) || ((sbuf.st_mode & S_IFMT) != S_IFDIR)) {
+ *s = '\\'; /* restore delimiter */
+ if (!dummy_create (stream,tmp)) ret = NIL;
+ }
+ else *s = '\\'; /* restore delimiter */
+ s[1] = c; /* restore character after delimiter */
+ }
+ flock (fd,LOCK_UN); /* release lock on the file */
+ close (fd); /* pacify NTFS */
+ /* rename the file */
+ if (ret && rename (file,tmp)) {
+ sprintf (tmp,"Can't rename mailbox %.80s to %.80s: %s",old,newname,
+ strerror (errno));
+ mm_log (tmp,ERROR);
+ ret = NIL; /* set failure */
+ }
+ }
+ else {
+ flock (fd,LOCK_UN); /* release lock on the file */
+ close (fd); /* pacify NTFS */
+ if (unlink (file)) {
+ sprintf (tmp,"Can't delete mailbox %.80s: %.80s",old,strerror (errno));
+ mm_log (tmp,ERROR);
+ ret = NIL; /* set failure */
+ }
+ }
+ unlockfd (ld,lock); /* release exclusive parse/append permission */
+ return ret; /* return success */
+}
+\f
+/* MTX mail open
+ * Accepts: stream to open
+ * Returns: stream on success, NIL on failure
+ */
+
+MAILSTREAM *mtx_open (MAILSTREAM *stream)
+{
+ int fd,ld;
+ char tmp[MAILTMPLEN];
+ /* return prototype for OP_PROTOTYPE call */
+ if (!stream) return &mtxproto;
+ if (stream->local) fatal ("mtx recycle stream");
+ /* canonicalize the mailbox name */
+ if (!dummy_file (tmp,stream->mailbox)) {
+ sprintf (tmp,"Can't open - invalid name: %.80s",stream->mailbox);
+ mm_log (tmp,ERROR);
+ }
+ if (stream->rdonly ||
+ (fd = open (tmp,O_BINARY|O_RDWR,NIL)) < 0) {
+ if ((fd = open (tmp,O_BINARY|O_RDONLY,NIL)) < 0) {
+ sprintf (tmp,"Can't open mailbox: %.80s",strerror (errno));
+ mm_log (tmp,ERROR);
+ return NIL;
+ }
+ else if (!stream->rdonly) { /* got it, but readonly */
+ mm_log ("Can't get write access to mailbox, access is readonly",WARN);
+ stream->rdonly = T;
+ }
+ }
+ stream->local = fs_get (sizeof (MTXLOCAL));
+ LOCAL->fd = fd; /* bind the file */
+ LOCAL->buf = (char *) fs_get (CHUNKSIZE);
+ LOCAL->buflen = CHUNKSIZE - 1;
+ /* note if an INBOX or not */
+ stream->inbox = !compare_cstring (stream->mailbox,"INBOX");
+ fs_give ((void **) &stream->mailbox);
+ stream->mailbox = cpystr (tmp);
+ /* get shared parse permission */
+ if ((ld = lockname (tmp,stream->mailbox,LOCK_SH)) < 0) {
+ mm_log ("Unable to lock open mailbox",ERROR);
+ return NIL;
+ }
+ flock (LOCAL->fd,LOCK_SH); /* lock the file */
+ unlockfd (ld,tmp); /* release shared parse permission */
+ LOCAL->filesize = 0; /* initialize parsed file size */
+ LOCAL->filetime = 0; /* time not set up yet */
+ LOCAL->mustcheck = LOCAL->shouldcheck = NIL;
+ stream->sequence++; /* bump sequence number */
+ stream->uid_validity = (unsigned long) time (0);
+ /* parse mailbox */
+ stream->nmsgs = stream->recent = 0;
+ if (mtx_ping (stream) && !stream->nmsgs)
+ mm_log ("Mailbox is empty",(long) NIL);
+ if (!LOCAL) return NIL; /* failure if stream died */
+ 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;
+ return stream; /* return stream to caller */
+}
+\f
+/* MTX mail close
+ * Accepts: MAIL stream
+ * close options
+ */
+
+void mtx_close (MAILSTREAM *stream,long options)
+{
+ if (stream && LOCAL) { /* only if a file is open */
+ int silent = stream->silent;
+ stream->silent = T; /* note this stream is dying */
+ if (options & CL_EXPUNGE) mtx_expunge (stream,NIL,NIL);
+ stream->silent = silent; /* restore previous status */
+ flock (LOCAL->fd,LOCK_UN); /* unlock local file */
+ close (LOCAL->fd); /* close the local file */
+ /* free local text 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 */
+ }
+}
+
+
+/* MTX mail fetch flags
+ * Accepts: MAIL stream
+ * sequence
+ * option flags
+ * Sniffs at file to see if some other process changed the flags
+ */
+
+void mtx_flags (MAILSTREAM *stream,char *sequence,long flags)
+{
+ unsigned long i;
+ if (mtx_ping (stream) && /* ping mailbox, get new status for messages */
+ ((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) mtx_elt (stream,i);
+}
+\f
+/* MTX 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 *mtx_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *length,
+ long flags)
+{
+ *length = 0; /* default to empty */
+ if (flags & FT_UID) return "";/* UID call "impossible" */
+ /* get to header position */
+ lseek (LOCAL->fd,mtx_hdrpos (stream,msgno,length),L_SET);
+ /* is buffer big enough? */
+ if (*length > LOCAL->buflen) {
+ fs_give ((void **) &LOCAL->buf);
+ LOCAL->buf = (char *) fs_get ((LOCAL->buflen = *length) + 1);
+ }
+ LOCAL->buf[*length] = '\0'; /* tie off string */
+ /* slurp the data */
+ read (LOCAL->fd,LOCAL->buf,*length);
+ return LOCAL->buf;
+}
+\f
+/* MTX mail fetch message text (body only)
+ * Accepts: MAIL stream
+ * message # to fetch
+ * pointer to returned header text length
+ * option flags
+ * Returns: T, always
+ */
+
+long mtx_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags)
+{
+ FDDATA d;
+ unsigned long i,j;
+ MESSAGECACHE *elt;
+ /* UID call "impossible" */
+ if (flags & FT_UID) return NIL;
+ elt = mtx_elt (stream,msgno); /* get message status */
+ /* if message not seen */
+ if (!(flags & FT_PEEK) && !elt->seen) {
+ elt->seen = T; /* mark message as seen */
+ /* recalculate status */
+ mtx_update_status (stream,msgno,NIL);
+ mm_flags (stream,msgno);
+ }
+ /* find header position */
+ i = mtx_hdrpos (stream,msgno,&j);
+ d.fd = LOCAL->fd; /* set up file descriptor */
+ d.pos = i + j;
+ d.chunk = LOCAL->buf; /* initial buffer chunk */
+ d.chunksize = CHUNKSIZE;
+ INIT (bs,fd_string,&d,elt->rfc822_size - j);
+ return T; /* success */
+}
+\f
+/* MTX mail modify flags
+ * Accepts: MAIL stream
+ * sequence
+ * flag(s)
+ * option flags
+ */
+
+void mtx_flag (MAILSTREAM *stream,char *sequence,char *flag,long flags)
+{
+ struct utimbuf times;
+ struct stat sbuf;
+ if (!stream->rdonly) { /* make sure the update takes */
+ fsync (LOCAL->fd);
+ fstat (LOCAL->fd,&sbuf); /* get current write time */
+ times.modtime = LOCAL->filetime = sbuf.st_mtime;
+ times.actime = time (0); /* make sure read comes after all that */
+ utime (stream->mailbox,×);
+ }
+}
+
+
+/* MTX mail per-message modify flags
+ * Accepts: MAIL stream
+ * message cache element
+ */
+
+void mtx_flagmsg (MAILSTREAM *stream,MESSAGECACHE *elt)
+{
+ struct stat sbuf;
+ /* maybe need to do a checkpoint? */
+ if (LOCAL->filetime && !LOCAL->shouldcheck) {
+ fstat (LOCAL->fd,&sbuf); /* get current write time */
+ if (LOCAL->filetime < sbuf.st_mtime) LOCAL->shouldcheck = T;
+ LOCAL->filetime = 0; /* don't do this test for any other messages */
+ }
+ /* recalculate status */
+ mtx_update_status (stream,elt->msgno,NIL);
+}
+\f
+/* MTX mail ping mailbox
+ * Accepts: MAIL stream
+ * Returns: T if stream still alive, NIL if not
+ */
+
+long mtx_ping (MAILSTREAM *stream)
+{
+ unsigned long i = 1;
+ long r = T;
+ int ld;
+ char lock[MAILTMPLEN];
+ struct stat sbuf;
+ if (stream && LOCAL) { /* only if stream already open */
+ fstat (LOCAL->fd,&sbuf); /* get current file poop */
+ if (LOCAL->filetime && !(LOCAL->mustcheck || LOCAL->shouldcheck) &&
+ (LOCAL->filetime < sbuf.st_mtime)) LOCAL->shouldcheck = T;
+ /* check for changed message status */
+ if (LOCAL->mustcheck || LOCAL->shouldcheck) {
+ LOCAL->filetime = sbuf.st_mtime;
+ if (LOCAL->shouldcheck) /* babble when we do this unilaterally */
+ mm_notify (stream,"[CHECK] Checking for flag updates",NIL);
+ while (i <= stream->nmsgs) mtx_elt (stream,i++);
+ LOCAL->mustcheck = LOCAL->shouldcheck = NIL;
+ }
+ /* get shared parse/append permission */
+ if ((sbuf.st_size != LOCAL->filesize) &&
+ ((ld = lockname (lock,stream->mailbox,LOCK_SH)) >= 0)) {
+ /* parse resulting mailbox */
+ r = (mtx_parse (stream)) ? T : NIL;
+ unlockfd (ld,lock); /* release shared parse/append permission */
+ }
+ }
+ return r; /* return result of the parse */
+}
+
+
+/* MTX mail check mailbox (reparses status too)
+ * Accepts: MAIL stream
+ */
+
+void mtx_check (MAILSTREAM *stream)
+{
+ /* mark that a check is desired */
+ if (LOCAL) LOCAL->mustcheck = T;
+ if (mtx_ping (stream)) mm_log ("Check completed",(long) NIL);
+}
+\f
+/* MTX mail expunge mailbox
+ * sequence to expunge if non-NIL
+ * expunge options
+ * Returns: T, always
+ */
+
+long mtx_expunge (MAILSTREAM *stream,char *sequence,long options)
+{
+ long ret;
+ struct utimbuf times;
+ struct stat sbuf;
+ off_t pos = 0;
+ int ld;
+ unsigned long i = 1;
+ unsigned long j,k,m,recent;
+ unsigned long n = 0;
+ unsigned long delta = 0;
+ char lock[MAILTMPLEN];
+ MESSAGECACHE *elt;
+ if (!(ret = (sequence ? ((options & EX_UID) ?
+ mail_uid_sequence (stream,sequence) :
+ mail_sequence (stream,sequence)) : LONGT) &&
+ mtx_ping (stream))); /* parse sequence if given, ping stream */
+ else if (stream->rdonly) mm_log ("Expunge ignored on readonly mailbox",WARN);
+ else {
+ if (LOCAL->filetime && !LOCAL->shouldcheck) {
+ fstat (LOCAL->fd,&sbuf); /* get current write time */
+ if (LOCAL->filetime < sbuf.st_mtime) LOCAL->shouldcheck = T;
+ }
+ /* get exclusive parse/append permission */
+ if ((ld = lockname (lock,stream->mailbox,LOCK_EX)) < 0)
+ mm_log ("Unable to lock expunge mailbox",ERROR);
+ /* make sure see any newly-arrived messages */
+ else if (!mtx_parse (stream));
+ /* get exclusive access */
+ else if (flock (LOCAL->fd,LOCK_EX|LOCK_NB)) {
+ flock (LOCAL->fd,LOCK_SH);/* recover previous lock */
+ mm_log ("Can't expunge because mailbox is in use by another process",
+ ERROR);
+ unlockfd (ld,lock); /* release exclusive parse/append permission */
+ }
+\f
+ else {
+ mm_critical (stream); /* go critical */
+ recent = stream->recent; /* get recent now that pinged and locked */
+ /* for each message */
+ while (i <= stream->nmsgs) {
+ /* get cache element */
+ elt = mtx_elt (stream,i);
+ /* number of bytes to smash or preserve */
+ k = elt->private.special.text.size + elt->rfc822_size;
+ /* if need to expunge this message */
+ if (elt->deleted && (sequence ? elt->sequence : T)) {
+ /* if recent, note one less recent message */
+ if (elt->recent) --recent;
+ delta += k; /* number of bytes to delete */
+ /* notify upper levels */
+ mail_expunged (stream,i);
+ n++; /* count up one more expunged message */
+ }
+ else if (i++ && delta) {/* preserved message */
+ /* first byte to preserve */
+ j = elt->private.special.offset;
+ do { /* read from source position */
+ m = min (k,LOCAL->buflen);
+ lseek (LOCAL->fd,j,L_SET);
+ read (LOCAL->fd,LOCAL->buf,m);
+ pos = j - delta; /* write to destination position */
+ while (T) {
+ lseek (LOCAL->fd,pos,L_SET);
+ if (write (LOCAL->fd,LOCAL->buf,m) > 0) break;
+ mm_notify (stream,strerror (errno),WARN);
+ mm_diskerror (stream,errno,T);
+ }
+ pos += m; /* new position */
+ j += m; /* next chunk, perhaps */
+ } while (k -= m); /* until done */
+ /* note the new address of this text */
+ elt->private.special.offset -= delta;
+ }
+ /* preserved but no deleted messages */
+ else pos = elt->private.special.offset + k;
+ }
+ if (n) { /* truncate file after last message */
+ if (pos != (LOCAL->filesize -= delta)) {
+ sprintf (LOCAL->buf,
+ "Calculated size mismatch %lu != %lu, delta = %lu",
+ (unsigned long) pos,(unsigned long) LOCAL->filesize,delta);
+ mm_log (LOCAL->buf,WARN);
+ LOCAL->filesize = pos;/* fix it then */
+ }
+ ftruncate (LOCAL->fd,LOCAL->filesize);
+ sprintf (LOCAL->buf,"Expunged %lu messages",n);
+ /* output the news */
+ mm_log (LOCAL->buf,(long) NIL);
+ }
+ else mm_log ("No messages deleted, so no update needed",(long) NIL);
+ fsync (LOCAL->fd); /* force disk update */
+ fstat (LOCAL->fd,&sbuf); /* get new write time */
+ times.modtime = LOCAL->filetime = sbuf.st_mtime;
+ times.actime = time (0); /* reset atime to now */
+ utime (stream->mailbox,×);
+ mm_nocritical (stream); /* release critical */
+ /* notify upper level of new mailbox size */
+ mail_exists (stream,stream->nmsgs);
+ mail_recent (stream,recent);
+ flock (LOCAL->fd,LOCK_SH);/* allow sharers again */
+ unlockfd (ld,lock); /* release exclusive parse/append permission */
+ }
+ }
+ return ret;
+}
+\f
+/* MTX mail copy message(s)
+ * Accepts: MAIL stream
+ * sequence
+ * destination mailbox
+ * copy options
+ * Returns: T if success, NIL if failed
+ */
+
+long mtx_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options)
+{
+ struct stat sbuf;
+ struct utimbuf times;
+ MESSAGECACHE *elt;
+ unsigned long i,j,k;
+ long ret = LONGT;
+ int fd,ld;
+ char file[MAILTMPLEN],lock[MAILTMPLEN];
+ mailproxycopy_t pc =
+ (mailproxycopy_t) mail_parameters (stream,GET_MAILPROXYCOPY,NIL);
+ /* make sure valid mailbox */
+ if (!mtx_isvalid (mailbox,file)) switch (errno) {
+ case ENOENT: /* no such file? */
+ mm_notify (stream,"[TRYCREATE] Must create mailbox before copy",NIL);
+ return NIL;
+ case 0: /* merely empty file? */
+ break;
+ case EACCES: /* file protected */
+ sprintf (LOCAL->buf,"Can't access destination: %.80s",mailbox);
+ MM_LOG (LOCAL->buf,ERROR);
+ return NIL;
+ case EINVAL:
+ if (pc) return (*pc) (stream,sequence,mailbox,options);
+ sprintf (LOCAL->buf,"Invalid MTX-format mailbox name: %.80s",mailbox);
+ mm_log (LOCAL->buf,ERROR);
+ return NIL;
+ default:
+ if (pc) return (*pc) (stream,sequence,mailbox,options);
+ sprintf (LOCAL->buf,"Not a MTX-format mailbox: %.80s",mailbox);
+ mm_log (LOCAL->buf,ERROR);
+ return NIL;
+ }
+ if (!((options & CP_UID) ? mail_uid_sequence (stream,sequence) :
+ mail_sequence (stream,sequence))) return NIL;
+ /* got file? */
+ if ((fd = open (file,O_BINARY|O_RDWR|O_CREAT,S_IREAD|S_IWRITE)) < 0) {
+ sprintf (LOCAL->buf,"Unable to open copy mailbox: %.80s",strerror (errno));
+ mm_log (LOCAL->buf,ERROR);
+ return NIL;
+ }
+ mm_critical (stream); /* go critical */
+ /* get exclusive parse/append permission */
+ if (flock (fd,LOCK_SH) || ((ld = lockname (lock,file,LOCK_EX)) < 0)) {
+ mm_log ("Unable to lock copy mailbox",ERROR);
+ mm_nocritical (stream);
+ return NIL;
+ }
+ fstat (fd,&sbuf); /* get current file size */
+ lseek (fd,sbuf.st_size,L_SET);/* move to end of file */
+\f
+ /* for each requested message */
+ for (i = 1; ret && (i <= stream->nmsgs); i++)
+ if ((elt = mail_elt (stream,i))->sequence) {
+ lseek (LOCAL->fd,elt->private.special.offset,L_SET);
+ /* number of bytes to copy */
+ k = elt->private.special.text.size + elt->rfc822_size;
+ do { /* read from source position */
+ j = min (k,LOCAL->buflen);
+ read (LOCAL->fd,LOCAL->buf,j);
+ if (write (fd,LOCAL->buf,j) < 0) ret = NIL;
+ } while (ret && (k -= j));/* until done */
+ }
+ /* make sure all the updates take */
+ if (!(ret && (ret = !fsync (fd)))) {
+ sprintf (LOCAL->buf,"Unable to write message: %s",strerror (errno));
+ mm_log (LOCAL->buf,ERROR);
+ ftruncate (fd,sbuf.st_size);
+ }
+ /* set atime to now-1 if successful copy */
+ if (ret) times.actime = time (0) - 1;
+ /* else preserved \Marked status */
+ else times.actime = (sbuf.st_ctime > sbuf.st_atime) ?
+ sbuf.st_atime : time (0);
+ times.modtime = sbuf.st_mtime;/* preserve mtime */
+ utime (file,×); /* set the times */
+ unlockfd (ld,lock); /* release exclusive parse/append permission */
+ close (fd); /* close the file */
+ mm_nocritical (stream); /* release critical */
+ /* delete all requested messages */
+ if (ret && (options & CP_MOVE)) {
+ for (i = 1; i <= stream->nmsgs; i++)
+ if ((elt = mtx_elt (stream,i))->sequence) {
+ elt->deleted = T; /* mark message deleted */
+ /* recalculate status */
+ mtx_update_status (stream,i,NIL);
+ }
+ if (!stream->rdonly) { /* make sure the update takes */
+ fsync (LOCAL->fd);
+ fstat (LOCAL->fd,&sbuf); /* get current write time */
+ times.modtime = LOCAL->filetime = sbuf.st_mtime;
+ times.actime = time (0); /* make sure atime remains greater */
+ utime (stream->mailbox,×);
+ }
+ }
+ if (ret && mail_parameters (NIL,GET_COPYUID,NIL))
+ mm_log ("Can not return meaningful COPYUID with this mailbox format",WARN);
+ return ret;
+}
+\f
+/* MTX mail append message from stringstruct
+ * Accepts: MAIL stream
+ * destination mailbox
+ * append callback
+ * data for callback
+ * Returns: T if append successful, else NIL
+ */
+
+long mtx_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data)
+{
+ struct stat sbuf;
+ int fd,ld,c;
+ char *flags,*date,tmp[MAILTMPLEN],file[MAILTMPLEN],lock[MAILTMPLEN];
+ struct utimbuf times;
+ FILE *df;
+ MESSAGECACHE elt;
+ long f;
+ unsigned long i,uf;
+ STRING *message;
+ long ret = LONGT;
+ /* default stream to prototype */
+ if (!stream) stream = &mtxproto;
+ /* make sure valid mailbox */
+ if (!mtx_isvalid (mailbox,file)) switch (errno) {
+ case ENOENT: /* no such file? */
+ if (!compare_cstring (mailbox,"INBOX")) mtx_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 EACCES: /* file protected */
+ sprintf (tmp,"Can't access destination: %.80s",mailbox);
+ MM_LOG (tmp,ERROR);
+ return NIL;
+ case EINVAL:
+ sprintf (tmp,"Invalid MTX-format mailbox name: %.80s",mailbox);
+ mm_log (tmp,ERROR);
+ return NIL;
+ default:
+ sprintf (tmp,"Not a MTX-format mailbox: %.80s",mailbox);
+ mm_log (tmp,ERROR);
+ return NIL;
+ }
+ /* get first message */
+ if (!(*af) (stream,data,&flags,&date,&message)) return NIL;
+\f
+ /* open destination mailbox */
+ if (((fd = open (file,O_BINARY|O_WRONLY|O_APPEND|O_CREAT,S_IREAD|S_IWRITE))
+ < 0) || !(df = fdopen (fd,"ab"))) {
+ sprintf (tmp,"Can't open append mailbox: %s",strerror (errno));
+ mm_log (tmp,ERROR);
+ return NIL;
+ }
+ /* get parse/append permission */
+ if (flock (fd,LOCK_SH) || ((ld = lockname (lock,file,LOCK_EX)) < 0)) {
+ mm_log ("Unable to lock append mailbox",ERROR);
+ close (fd);
+ return NIL;
+ }
+ mm_critical (stream); /* go critical */
+ fstat (fd,&sbuf); /* get current file size */
+ errno = 0;
+ do { /* parse flags */
+ if (!SIZE (message)) { /* guard against zero-length */
+ mm_log ("Append of zero-length message",ERROR);
+ ret = NIL;
+ break;
+ }
+ f = mail_parse_flags (stream,flags,&i);
+ /* reverse bits (dontcha wish we had CIRC?) */
+ for (uf = 0; i; uf |= 1 << (29 - find_rightmost_bit (&i)));
+ if (date) { /* parse date if given */
+ if (!mail_parse_date (&elt,date)) {
+ sprintf (tmp,"Bad date in append: %.80s",date);
+ mm_log (tmp,ERROR);
+ ret = NIL; /* mark failure */
+ break;
+ }
+ mail_date (tmp,&elt); /* write preseved date */
+ }
+ else internal_date (tmp); /* get current date in IMAP format */
+ /* write header */
+ if (fprintf (df,"%s,%lu;%010lo%02lo\015\012",tmp,i = SIZE (message),uf,
+ (unsigned long) f) < 0) ret = NIL;
+ else { /* write message */
+ if (i) do c = 0xff & SNX (message);
+ while ((putc (c,df) != EOF) && --i);
+ /* get next message */
+ if (i || !(*af) (stream,data,&flags,&date,&message)) ret = NIL;
+ }
+ } while (ret && message);
+ /* if error... */
+ if (!ret || (fflush (df) == EOF)) {
+ ftruncate (fd,sbuf.st_size);/* revert file */
+ close (fd); /* make sure fclose() doesn't corrupt us */
+ if (errno) {
+ sprintf (tmp,"Message append failed: %s",strerror (errno));
+ mm_log (tmp,ERROR);
+ }
+ ret = NIL;
+ }
+ if (ret) times.actime = time (0) - 1;
+ /* else preserved \Marked status */
+ else times.actime = (sbuf.st_ctime > sbuf.st_atime) ?
+ sbuf.st_atime : time (0);
+ times.modtime = sbuf.st_mtime;/* preserve mtime */
+ utime (file,×); /* set the times */
+ fclose (df); /* close the file */
+ unlockfd (ld,lock); /* release exclusive parse/append permission */
+ mm_nocritical (stream); /* release critical */
+ if (ret && mail_parameters (NIL,GET_APPENDUID,NIL))
+ mm_log ("Can not return meaningful APPENDUID with this mailbox format",
+ WARN);
+ return ret;
+}
+\f
+/* Internal routines */
+
+
+/* MTX mail parse mailbox
+ * Accepts: MAIL stream
+ * Returns: T if parse OK
+ * NIL if failure, stream aborted
+ */
+
+long mtx_parse (MAILSTREAM *stream)
+{
+ struct stat sbuf;
+ MESSAGECACHE *elt = NIL;
+ unsigned char c,*s,*t,*x;
+ char tmp[MAILTMPLEN];
+ unsigned long i,j;
+ long curpos = LOCAL->filesize;
+ long nmsgs = stream->nmsgs;
+ long recent = stream->recent;
+ short added = NIL;
+ short silent = stream->silent;
+ fstat (LOCAL->fd,&sbuf); /* get status */
+ if (sbuf.st_size < curpos) { /* sanity check */
+ sprintf (tmp,"Mailbox shrank from %ld to %ld!",curpos,sbuf.st_size);
+ mm_log (tmp,ERROR);
+ mtx_close (stream,NIL);
+ return NIL;
+ }
+ stream->silent = T; /* don't pass up mm_exists() events yet */
+ while (sbuf.st_size - curpos){/* while there is stuff to parse */
+ /* get to that position in the file */
+ lseek (LOCAL->fd,curpos,L_SET);
+ if ((i = read (LOCAL->fd,LOCAL->buf,64)) <= 0) {
+ sprintf (tmp,"Unable to read internal header at %lu, size = %lu: %s",
+ (unsigned long) curpos,(unsigned long) sbuf.st_size,
+ i ? strerror (errno) : "no data read");
+ mm_log (tmp,ERROR);
+ mtx_close (stream,NIL);
+ return NIL;
+ }
+ LOCAL->buf[i] = '\0'; /* tie off buffer just in case */
+ if (!((s = strchr (LOCAL->buf,'\015')) && (s[1] == '\012'))) {
+ sprintf (tmp,"Unable to find CRLF at %lu in %lu bytes, text: %s",
+ (unsigned long) curpos,i,(char *) LOCAL->buf);
+ mm_log (tmp,ERROR);
+ mtx_close (stream,NIL);
+ return NIL;
+ }
+ *s = '\0'; /* tie off header line */
+ i = (s + 2) - LOCAL->buf; /* note start of text offset */
+ if (!((s = strchr (LOCAL->buf,',')) && (t = strchr (s+1,';')))) {
+ sprintf (tmp,"Unable to parse internal header at %lu: %s",
+ (unsigned long) curpos,(char *) LOCAL->buf);
+ mm_log (tmp,ERROR);
+ mtx_close (stream,NIL);
+ return NIL;
+ }
+ *s++ = '\0'; *t++ = '\0'; /* tie off fields */
+\f
+ added = T; /* note that a new message was added */
+ /* swell the cache */
+ mail_exists (stream,++nmsgs);
+ /* instantiate an elt for this message */
+ (elt = mail_elt (stream,nmsgs))->valid = T;
+ elt->private.uid = ++stream->uid_last;
+ /* note file offset of header */
+ elt->private.special.offset = curpos;
+ /* in case error */
+ elt->private.special.text.size = 0;
+ /* header size not known yet */
+ elt->private.msg.header.text.size = 0;
+ x = s; /* parse the header components */
+ if (mail_parse_date (elt,LOCAL->buf) &&
+ (elt->rfc822_size = strtoul (s,(char **) &s,10)) && (!(s && *s)) &&
+ isdigit (t[0]) && 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]) && !t[12])
+ elt->private.special.text.size = i;
+ else { /* oops */
+ sprintf (tmp,"Unable to parse internal header elements at %ld: %s,%s;%s",
+ curpos,(char *) LOCAL->buf,(char *) x,(char *) t);
+ mm_log (tmp,ERROR);
+ mtx_close (stream,NIL);
+ return NIL;
+ }
+ /* make sure didn't run off end of file */
+ if ((curpos += (elt->rfc822_size + i)) > sbuf.st_size) {
+ sprintf (tmp,"Last message (at %lu) runs past end of file (%lu > %lu)",
+ elt->private.special.offset,(unsigned long) curpos,
+ (unsigned long) sbuf.st_size);
+ mm_log (tmp,ERROR);
+ mtx_close (stream,NIL);
+ return NIL;
+ }
+ c = t[10]; /* remember first system flags byte */
+ t[10] = '\0'; /* tie off flags */
+ j = strtoul (t,NIL,8); /* get user flags value */
+ t[10] = c; /* restore first system flags byte */
+ /* set up all valid user flags (reversed!) */
+ while (j) if (((i = 29 - find_rightmost_bit (&j)) < NUSERFLAGS) &&
+ stream->user_flags[i]) elt->user_flags |= 1 << i;
+ /* calculate system flags */
+ if ((j = ((t[10]-'0') * 8) + t[11]-'0') & fSEEN) elt->seen = T;
+ if (j & fDELETED) elt->deleted = T;
+ if (j & fFLAGGED) elt->flagged = T;
+ if (j & fANSWERED) elt->answered = T;
+ if (j & fDRAFT) elt->draft = T;
+ if (!(j & fOLD)) { /* newly arrived message? */
+ elt->recent = T;
+ recent++; /* count up a new recent message */
+ /* mark it as old */
+ mtx_update_status (stream,nmsgs,NIL);
+ }
+ }
+ fsync (LOCAL->fd); /* make sure all the fOLD flags take */
+ /* update parsed file size and time */
+ LOCAL->filesize = sbuf.st_size;
+ fstat (LOCAL->fd,&sbuf); /* get status again to ensure time is right */
+ LOCAL->filetime = sbuf.st_mtime;
+ if (added && !stream->rdonly){/* make sure atime updated */
+ struct utimbuf times;
+ times.actime = time (0);
+ times.modtime = LOCAL->filetime;
+ utime (stream->mailbox,×);
+ }
+ stream->silent = silent; /* can pass up events now */
+ mail_exists (stream,nmsgs); /* notify upper level of new mailbox size */
+ mail_recent (stream,recent); /* and of change in recent messages */
+ return LONGT; /* return the winnage */
+}
+\f
+/* MTX get cache element with status updating from file
+ * Accepts: MAIL stream
+ * message number
+ * Returns: cache element
+ */
+
+MESSAGECACHE *mtx_elt (MAILSTREAM *stream,unsigned long msgno)
+{
+ MESSAGECACHE *elt = mail_elt (stream,msgno);
+ 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;
+ mtx_read_flags (stream,elt);
+ 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))
+ mm_flags (stream,msgno); /* let top level know */
+ return elt;
+}
+\f
+/* MTX read flags from file
+ * Accepts: MAIL stream
+ * Returns: cache element
+ */
+
+void mtx_read_flags (MAILSTREAM *stream,MESSAGECACHE *elt)
+{
+ unsigned long i,j;
+ /* noop if readonly and have valid flags */
+ if (stream->rdonly && elt->valid) return;
+ /* set the seek pointer */
+ lseek (LOCAL->fd,(off_t) elt->private.special.offset +
+ elt->private.special.text.size - 14,L_SET);
+ /* read the new flags */
+ if (read (LOCAL->fd,LOCAL->buf,12) < 0) {
+ sprintf (LOCAL->buf,"Unable to read new status: %s",strerror (errno));
+ fatal (LOCAL->buf);
+ }
+ /* calculate system flags */
+ i = (((LOCAL->buf[10]-'0') * 8) + LOCAL->buf[11]-'0');
+ elt->seen = i & fSEEN ? T : NIL; elt->deleted = i & fDELETED ? T : NIL;
+ elt->flagged = i & fFLAGGED ? T : NIL;
+ elt->answered = i & fANSWERED ? T : NIL; elt->draft = i & fDRAFT ? T : NIL;
+ LOCAL->buf[10] = '\0'; /* tie off flags */
+ j = strtoul(LOCAL->buf,NIL,8);/* get user flags value */
+ /* set up all valid user flags (reversed!) */
+ while (j) if (((i = 29 - find_rightmost_bit (&j)) < NUSERFLAGS) &&
+ stream->user_flags[i]) elt->user_flags |= 1 << i;
+ elt->valid = T; /* have valid flags now */
+}
+\f
+/* MTX update status string
+ * Accepts: MAIL stream
+ * message number
+ * flag saying whether or not to sync
+ */
+
+void mtx_update_status (MAILSTREAM *stream,unsigned long msgno,long syncflag)
+{
+ struct utimbuf times;
+ struct stat sbuf;
+ MESSAGECACHE *elt = mail_elt (stream,msgno);
+ unsigned long j,k = 0;
+ /* readonly */
+ if (stream->rdonly || !elt->valid) mtx_read_flags (stream,elt);
+ else { /* readwrite */
+ j = elt->user_flags; /* get user flags */
+ /* reverse bits (dontcha wish we had CIRC?) */
+ while (j) k |= 1 << (29 - find_rightmost_bit (&j));
+ /* print new flag string */
+ sprintf (LOCAL->buf,"%010lo%02o",k,(unsigned)
+ (fOLD + (fSEEN * elt->seen) + (fDELETED * elt->deleted) +
+ (fFLAGGED * elt->flagged) + (fANSWERED * elt->answered) +
+ (fDRAFT * elt->draft)));
+ while (T) { /* get to that place in the file */
+ lseek (LOCAL->fd,(off_t) elt->private.special.offset +
+ elt->private.special.text.size - 14,L_SET);
+ /* write new flags */
+ if (write (LOCAL->fd,LOCAL->buf,12) > 0) break;
+ mm_notify (stream,strerror (errno),WARN);
+ mm_diskerror (stream,errno,T);
+ }
+ if (syncflag) { /* sync if requested */
+ fsync (LOCAL->fd);
+ fstat (LOCAL->fd,&sbuf); /* get new write time */
+ times.modtime = LOCAL->filetime = sbuf.st_mtime;
+ times.actime = time (0); /* make sure read is later */
+ utime (stream->mailbox,×);
+ }
+ }
+}
+\f
+/* MTX locate header for a message
+ * Accepts: MAIL stream
+ * message number
+ * pointer to returned header size
+ * Returns: position of header in file
+ */
+
+unsigned long mtx_hdrpos (MAILSTREAM *stream,unsigned long msgno,
+ unsigned long *size)
+{
+ unsigned long siz;
+ long i = 0;
+ int q = 0;
+ char *s,tmp[MAILTMPLEN];
+ MESSAGECACHE *elt = mtx_elt (stream,msgno);
+ unsigned long ret = elt->private.special.offset +
+ elt->private.special.text.size;
+ /* is header size known? */
+ if (!(*size = elt->private.msg.header.text.size)) {
+ lseek (LOCAL->fd,ret,L_SET);/* get to header position */
+ /* search message for CRLF CRLF */
+ for (siz = 1,s = tmp; siz <= elt->rfc822_size; siz++) {
+ /* read another buffer as necessary */
+ if ((--i <= 0) && /* buffer empty? */
+ (read (LOCAL->fd,s = tmp,
+ i = min (elt->rfc822_size - siz,(long) MAILTMPLEN)) < 0))
+ return ret; /* I/O error? */
+ switch (q) { /* sniff at buffer */
+ case 0: /* first character */
+ q = (*s++ == '\015') ? 1 : 0;
+ break;
+ case 1: /* second character */
+ q = (*s++ == '\012') ? 2 : 0;
+ break;
+ case 2: /* third character */
+ q = (*s++ == '\015') ? 3 : 0;
+ break;
+ case 3: /* fourth character */
+ if (*s++ == '\012') { /* have the sequence? */
+ /* yes, note for later */
+ elt->private.msg.header.text.size = *size = siz;
+ return ret;
+ }
+ q = 0; /* lost... */
+ break;
+ }
+ }
+ /* header consumes entire message */
+ elt->private.msg.header.text.size = *size = elt->rfc822_size;
+ }
+ return ret;
+}
--- /dev/null
+/* ========================================================================
+ * Copyright 1988-2007 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: MTX mail routines
+ *
+ * Author: Mark Crispin
+ * Networks and Distributed Computing
+ * Computing & Communications
+ * University of Washington
+ * Administration Building, AG-44
+ * Seattle, WA 98195
+ * Internet: MRC@CAC.Washington.EDU
+ *
+ * Date: 22 May 1990
+ * Last Edited: 15 June 2007
+ */
+
+
+/* FILE TIME SEMANTICS
+ *
+ * The atime is the last read time of the file.
+ * The mtime is the last flags update time of the file.
+ * The ctime is the last write time of the file.
+ */
+
+#include <stdio.h>
+#include <ctype.h>
+#include <errno.h>
+extern int errno; /* just in case */
+#include "mail.h"
+#include "osdep.h"
+#include <fcntl.h>
+#include <time.h>
+#include <sys/stat.h>
+#include <sys/utime.h>
+#include "misc.h"
+#include "dummy.h"
+#include "fdstring.h"
+\f
+/* MTX I/O stream local data */
+
+typedef struct mtx_local {
+ unsigned int shouldcheck: 1; /* if ping should do a check instead */
+ unsigned int mustcheck: 1; /* if ping must do a check instead */
+ int fd; /* file descriptor for I/O */
+ off_t filesize; /* file size parsed */
+ time_t filetime; /* last file time */
+ time_t lastsnarf; /* last snarf time */
+ unsigned char *buf; /* temporary buffer */
+ unsigned long buflen; /* current size of temporary buffer */
+} MTXLOCAL;
+
+
+/* Convenient access to local data */
+
+#define LOCAL ((MTXLOCAL *) stream->local)
+
+
+/* Function prototypes */
+
+DRIVER *mtx_valid (char *name);
+int mtx_isvalid (char *name,char *file);
+void *mtx_parameters (long function,void *value);
+void mtx_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents);
+void mtx_list (MAILSTREAM *stream,char *ref,char *pat);
+void mtx_lsub (MAILSTREAM *stream,char *ref,char *pat);
+long mtx_create (MAILSTREAM *stream,char *mailbox);
+long mtx_delete (MAILSTREAM *stream,char *mailbox);
+long mtx_rename (MAILSTREAM *stream,char *old,char *newname);
+long mtx_status (MAILSTREAM *stream,char *mbx,long flags);
+MAILSTREAM *mtx_open (MAILSTREAM *stream);
+void mtx_close (MAILSTREAM *stream,long options);
+void mtx_flags (MAILSTREAM *stream,char *sequence,long flags);
+char *mtx_header (MAILSTREAM *stream,unsigned long msgno,
+ unsigned long *length,long flags);
+long mtx_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags);
+void mtx_flag (MAILSTREAM *stream,char *sequence,char *flag,long flags);
+void mtx_flagmsg (MAILSTREAM *stream,MESSAGECACHE *elt);
+long mtx_ping (MAILSTREAM *stream);
+void mtx_check (MAILSTREAM *stream);
+void mtx_snarf (MAILSTREAM *stream);
+long mtx_expunge (MAILSTREAM *stream,char *sequence,long options);
+long mtx_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options);
+long mtx_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data);
+
+long mtx_parse (MAILSTREAM *stream);
+MESSAGECACHE *mtx_elt (MAILSTREAM *stream,unsigned long msgno);
+void mtx_read_flags (MAILSTREAM *stream,MESSAGECACHE *elt);
+void mtx_update_status (MAILSTREAM *stream,unsigned long msgno,long syncflag);
+unsigned long mtx_hdrpos (MAILSTREAM *stream,unsigned long msgno,
+ unsigned long *size);
+
+\f
+/* MTX mail routines */
+
+
+/* Driver dispatch used by MAIL */
+
+DRIVER mtxdriver = {
+ "mtx", /* driver name */
+ /* driver flags */
+ DR_LOCAL|DR_MAIL|DR_CRLF|DR_NOSTICKY,
+ (DRIVER *) NIL, /* next driver */
+ mtx_valid, /* mailbox is valid for us */
+ mtx_parameters, /* manipulate parameters */
+ mtx_scan, /* scan mailboxes */
+ mtx_list, /* list mailboxes */
+ mtx_lsub, /* list subscribed mailboxes */
+ NIL, /* subscribe to mailbox */
+ NIL, /* unsubscribe from mailbox */
+ mtx_create, /* create mailbox */
+ mtx_delete, /* delete mailbox */
+ mtx_rename, /* rename mailbox */
+ mail_status_default, /* status of mailbox */
+ mtx_open, /* open mailbox */
+ mtx_close, /* close mailbox */
+ mtx_flags, /* fetch message "fast" attributes */
+ mtx_flags, /* fetch message flags */
+ NIL, /* fetch overview */
+ NIL, /* fetch message envelopes */
+ mtx_header, /* fetch message header */
+ mtx_text, /* fetch message body */
+ NIL, /* fetch partial message text */
+ NIL, /* unique identifier */
+ NIL, /* message number */
+ mtx_flag, /* modify flags */
+ mtx_flagmsg, /* per-message modify flags */
+ NIL, /* search for message based on criteria */
+ NIL, /* sort messages */
+ NIL, /* thread messages */
+ mtx_ping, /* ping mailbox to see if still alive */
+ mtx_check, /* check for new messages */
+ mtx_expunge, /* expunge deleted messages */
+ mtx_copy, /* copy messages to another mailbox */
+ mtx_append, /* append string message to mailbox */
+ NIL /* garbage collect stream */
+};
+
+ /* prototype stream */
+MAILSTREAM mtxproto = {&mtxdriver};
+\f
+/* MTX mail validate mailbox
+ * Accepts: mailbox name
+ * Returns: our driver if name is valid, NIL otherwise
+ */
+
+DRIVER *mtx_valid (char *name)
+{
+ char tmp[MAILTMPLEN];
+ return mtx_isvalid (name,tmp) ? &mtxdriver : NIL;
+}
+
+
+/* MTX mail test for valid mailbox
+ * Accepts: mailbox name
+ * buffer to return file name
+ * Returns: T if valid, NIL otherwise
+ */
+
+int mtx_isvalid (char *name,char *file)
+{
+ int fd;
+ int ret = NIL;
+ char *s,tmp[MAILTMPLEN];
+ struct stat sbuf;
+ struct utimbuf times;
+ errno = EINVAL; /* assume invalid argument */
+ /* if file, get its status */
+ if ((s = dummy_file (file,name)) && !stat (s,&sbuf) &&
+ ((sbuf.st_mode & S_IFMT) == S_IFREG)) {
+ if (!sbuf.st_size)errno = 0;/* empty file */
+ else if ((fd = open (file,O_BINARY|O_RDONLY,NIL)) >= 0) {
+ memset (tmp,'\0',MAILTMPLEN);
+ if ((read (fd,tmp,64) >= 0) && (s = strchr (tmp,'\015')) &&
+ (s[1] == '\012')) { /* valid format? */
+ *s = '\0'; /* tie off header */
+ /* must begin with dd-mmm-yy" */
+ ret = (((tmp[2] == '-' && tmp[6] == '-') ||
+ (tmp[1] == '-' && tmp[5] == '-')) &&
+ (s = strchr (tmp+18,',')) && strchr (s+2,';')) ? T : NIL;
+ }
+ else errno = -1; /* bogus format */
+ close (fd); /* close the file */
+ /* \Marked status? */
+ if (sbuf.st_ctime > sbuf.st_atime) {
+ /* preserve atime and mtime */
+ times.actime = sbuf.st_atime;
+ times.modtime = sbuf.st_mtime;
+ utime (file,×); /* set the times */
+ }
+ }
+ }
+ /* in case INBOX but not mtx format */
+ else if ((errno == ENOENT) && !compare_cstring (name,"INBOX")) errno = -1;
+ return ret; /* return what we should */
+}
+
+
+/* MTX manipulate driver parameters
+ * Accepts: function code
+ * function-dependent value
+ * Returns: function-dependent return value
+ */
+
+void *mtx_parameters (long function,void *value)
+{
+ return NIL;
+}
+\f
+/* MTX mail scan mailboxes
+ * Accepts: mail stream
+ * reference
+ * pattern to search
+ * string to scan
+ */
+
+void mtx_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents)
+{
+ if (stream) dummy_scan (NIL,ref,pat,contents);
+}
+
+
+/* MTX mail list mailboxes
+ * Accepts: mail stream
+ * reference
+ * pattern to search
+ */
+
+void mtx_list (MAILSTREAM *stream,char *ref,char *pat)
+{
+ if (stream) dummy_list (NIL,ref,pat);
+}
+
+
+/* MTX mail list subscribed mailboxes
+ * Accepts: mail stream
+ * reference
+ * pattern to search
+ */
+
+void mtx_lsub (MAILSTREAM *stream,char *ref,char *pat)
+{
+ if (stream) dummy_lsub (NIL,ref,pat);
+}
+\f
+/* MTX mail create mailbox
+ * Accepts: MAIL stream
+ * mailbox name to create
+ * Returns: T on success, NIL on failure
+ */
+
+long mtx_create (MAILSTREAM *stream,char *mailbox)
+{
+ char *s,mbx[MAILTMPLEN];
+ if (s = dummy_file (mbx,mailbox)) return dummy_create (stream,s);
+ sprintf (mbx,"Can't create %.80s: invalid name",mailbox);
+ mm_log (mbx,ERROR);
+ return NIL;
+}
+
+
+/* MTX mail delete mailbox
+ * Accepts: MAIL stream
+ * mailbox name to delete
+ * Returns: T on success, NIL on failure
+ */
+
+long mtx_delete (MAILSTREAM *stream,char *mailbox)
+{
+ return mtx_rename (stream,mailbox,NIL);
+}
+\f
+/* MTX mail rename mailbox
+ * Accepts: MAIL stream
+ * old mailbox name
+ * new mailbox name (or NIL for delete)
+ * Returns: T on success, NIL on failure
+ */
+
+long mtx_rename (MAILSTREAM *stream,char *old,char *newname)
+{
+ long ret = LONGT;
+ char c,*s,tmp[MAILTMPLEN],file[MAILTMPLEN],lock[MAILTMPLEN];
+ int fd,ld;
+ struct stat sbuf;
+ if (!dummy_file (file,old) ||
+ (newname && (!((s = mailboxfile (tmp,newname)) && *s) ||
+ ((s = strrchr (tmp,'\\')) && !s[1])))) {
+ sprintf (tmp,newname ?
+ "Can't rename mailbox %.80s to %.80s: invalid name" :
+ "Can't delete mailbox %.80s: invalid name",
+ old,newname);
+ mm_log (tmp,ERROR);
+ return NIL;
+ }
+ if ((fd = open (file,O_BINARY|O_RDWR,NIL)) < 0) {
+ sprintf (tmp,"Can't open mailbox %.80s: %s",old,strerror (errno));
+ mm_log (tmp,ERROR);
+ return NIL;
+ }
+ /* get exclusive parse/append permission */
+ if ((ld = lockname (lock,file,LOCK_EX)) < 0) {
+ mm_log ("Unable to lock rename mailbox",ERROR);
+ return NIL;
+ }
+ /* lock out other users */
+ if (flock (fd,LOCK_EX|LOCK_NB)) {
+ close (fd); /* couldn't lock, give up on it then */
+ sprintf (tmp,"Mailbox %.80s is in use by another process",old);
+ mm_log (tmp,ERROR);
+ unlockfd (ld,lock); /* release exclusive parse/append permission */
+ return NIL;
+ }
+\f
+ if (newname) { /* want rename? */
+ /* found superior to destination name? */
+ if ((s = strrchr (tmp,'\\')) && (s != tmp) &&
+ ((tmp[1] != ':') || (s != tmp + 2))) {
+ c = s[1]; /* remember character after delimiter */
+ *s = s[1] = '\0'; /* tie off name at delimiter */
+ /* name doesn't exist, create it */
+ if (stat (tmp,&sbuf) || ((sbuf.st_mode & S_IFMT) != S_IFDIR)) {
+ *s = '\\'; /* restore delimiter */
+ if (!dummy_create (stream,tmp)) ret = NIL;
+ }
+ else *s = '\\'; /* restore delimiter */
+ s[1] = c; /* restore character after delimiter */
+ }
+ flock (fd,LOCK_UN); /* release lock on the file */
+ close (fd); /* pacify NTFS */
+ /* rename the file */
+ if (ret && rename (file,tmp)) {
+ sprintf (tmp,"Can't rename mailbox %.80s to %.80s: %s",old,newname,
+ strerror (errno));
+ mm_log (tmp,ERROR);
+ ret = NIL; /* set failure */
+ }
+ }
+ else {
+ flock (fd,LOCK_UN); /* release lock on the file */
+ close (fd); /* pacify NTFS */
+ if (unlink (file)) {
+ sprintf (tmp,"Can't delete mailbox %.80s: %.80s",old,strerror (errno));
+ mm_log (tmp,ERROR);
+ ret = NIL; /* set failure */
+ }
+ }
+ unlockfd (ld,lock); /* release exclusive parse/append permission */
+ return ret; /* return success */
+}
+\f
+/* MTX mail open
+ * Accepts: stream to open
+ * Returns: stream on success, NIL on failure
+ */
+
+MAILSTREAM *mtx_open (MAILSTREAM *stream)
+{
+ int fd,ld;
+ char tmp[MAILTMPLEN];
+ /* return prototype for OP_PROTOTYPE call */
+ if (!stream) return &mtxproto;
+ if (stream->local) fatal ("mtx recycle stream");
+ /* canonicalize the mailbox name */
+ if (!dummy_file (tmp,stream->mailbox)) {
+ sprintf (tmp,"Can't open - invalid name: %.80s",stream->mailbox);
+ mm_log (tmp,ERROR);
+ }
+ if (stream->rdonly ||
+ (fd = open (tmp,O_BINARY|O_RDWR,NIL)) < 0) {
+ if ((fd = open (tmp,O_BINARY|O_RDONLY,NIL)) < 0) {
+ sprintf (tmp,"Can't open mailbox: %.80s",strerror (errno));
+ mm_log (tmp,ERROR);
+ return NIL;
+ }
+ else if (!stream->rdonly) { /* got it, but readonly */
+ mm_log ("Can't get write access to mailbox, access is readonly",WARN);
+ stream->rdonly = T;
+ }
+ }
+ stream->local = fs_get (sizeof (MTXLOCAL));
+ LOCAL->fd = fd; /* bind the file */
+ LOCAL->buf = (char *) fs_get (CHUNKSIZE);
+ LOCAL->buflen = CHUNKSIZE - 1;
+ /* note if an INBOX or not */
+ stream->inbox = !compare_cstring (stream->mailbox,"INBOX");
+ fs_give ((void **) &stream->mailbox);
+ stream->mailbox = cpystr (tmp);
+ /* get shared parse permission */
+ if ((ld = lockname (tmp,stream->mailbox,LOCK_SH)) < 0) {
+ mm_log ("Unable to lock open mailbox",ERROR);
+ return NIL;
+ }
+ flock (LOCAL->fd,LOCK_SH); /* lock the file */
+ unlockfd (ld,tmp); /* release shared parse permission */
+ LOCAL->filesize = 0; /* initialize parsed file size */
+ LOCAL->filetime = 0; /* time not set up yet */
+ LOCAL->mustcheck = LOCAL->shouldcheck = NIL;
+ stream->sequence++; /* bump sequence number */
+ stream->uid_validity = (unsigned long) time (0);
+ /* parse mailbox */
+ stream->nmsgs = stream->recent = 0;
+ if (mtx_ping (stream) && !stream->nmsgs)
+ mm_log ("Mailbox is empty",(long) NIL);
+ if (!LOCAL) return NIL; /* failure if stream died */
+ 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;
+ return stream; /* return stream to caller */
+}
+\f
+/* MTX mail close
+ * Accepts: MAIL stream
+ * close options
+ */
+
+void mtx_close (MAILSTREAM *stream,long options)
+{
+ if (stream && LOCAL) { /* only if a file is open */
+ int silent = stream->silent;
+ stream->silent = T; /* note this stream is dying */
+ if (options & CL_EXPUNGE) mtx_expunge (stream,NIL,NIL);
+ stream->silent = silent; /* restore previous status */
+ flock (LOCAL->fd,LOCK_UN); /* unlock local file */
+ close (LOCAL->fd); /* close the local file */
+ /* free local text 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 */
+ }
+}
+
+
+/* MTX mail fetch flags
+ * Accepts: MAIL stream
+ * sequence
+ * option flags
+ * Sniffs at file to see if some other process changed the flags
+ */
+
+void mtx_flags (MAILSTREAM *stream,char *sequence,long flags)
+{
+ unsigned long i;
+ if (mtx_ping (stream) && /* ping mailbox, get new status for messages */
+ ((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) mtx_elt (stream,i);
+}
+\f
+/* MTX 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 *mtx_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *length,
+ long flags)
+{
+ *length = 0; /* default to empty */
+ if (flags & FT_UID) return "";/* UID call "impossible" */
+ /* get to header position */
+ lseek (LOCAL->fd,mtx_hdrpos (stream,msgno,length),L_SET);
+ /* is buffer big enough? */
+ if (*length > LOCAL->buflen) {
+ fs_give ((void **) &LOCAL->buf);
+ LOCAL->buf = (char *) fs_get ((LOCAL->buflen = *length) + 1);
+ }
+ LOCAL->buf[*length] = '\0'; /* tie off string */
+ /* slurp the data */
+ read (LOCAL->fd,LOCAL->buf,*length);
+ return LOCAL->buf;
+}
+\f
+/* MTX mail fetch message text (body only)
+ * Accepts: MAIL stream
+ * message # to fetch
+ * pointer to returned header text length
+ * option flags
+ * Returns: T, always
+ */
+
+long mtx_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags)
+{
+ FDDATA d;
+ unsigned long i,j;
+ MESSAGECACHE *elt;
+ /* UID call "impossible" */
+ if (flags & FT_UID) return NIL;
+ elt = mtx_elt (stream,msgno); /* get message status */
+ /* if message not seen */
+ if (!(flags & FT_PEEK) && !elt->seen) {
+ elt->seen = T; /* mark message as seen */
+ /* recalculate status */
+ mtx_update_status (stream,msgno,NIL);
+ mm_flags (stream,msgno);
+ }
+ /* find header position */
+ i = mtx_hdrpos (stream,msgno,&j);
+ d.fd = LOCAL->fd; /* set up file descriptor */
+ d.pos = i + j;
+ d.chunk = LOCAL->buf; /* initial buffer chunk */
+ d.chunksize = CHUNKSIZE;
+ INIT (bs,fd_string,&d,elt->rfc822_size - j);
+ return T; /* success */
+}
+\f
+/* MTX mail modify flags
+ * Accepts: MAIL stream
+ * sequence
+ * flag(s)
+ * option flags
+ */
+
+void mtx_flag (MAILSTREAM *stream,char *sequence,char *flag,long flags)
+{
+ struct utimbuf times;
+ struct stat sbuf;
+ if (!stream->rdonly) { /* make sure the update takes */
+ fsync (LOCAL->fd);
+ fstat (LOCAL->fd,&sbuf); /* get current write time */
+ times.modtime = LOCAL->filetime = sbuf.st_mtime;
+ times.actime = time (0); /* make sure read comes after all that */
+ utime (stream->mailbox,×);
+ }
+}
+
+
+/* MTX mail per-message modify flags
+ * Accepts: MAIL stream
+ * message cache element
+ */
+
+void mtx_flagmsg (MAILSTREAM *stream,MESSAGECACHE *elt)
+{
+ struct stat sbuf;
+ /* maybe need to do a checkpoint? */
+ if (LOCAL->filetime && !LOCAL->shouldcheck) {
+ fstat (LOCAL->fd,&sbuf); /* get current write time */
+ if (LOCAL->filetime < sbuf.st_mtime) LOCAL->shouldcheck = T;
+ LOCAL->filetime = 0; /* don't do this test for any other messages */
+ }
+ /* recalculate status */
+ mtx_update_status (stream,elt->msgno,NIL);
+}
+\f
+/* MTX mail ping mailbox
+ * Accepts: MAIL stream
+ * Returns: T if stream still alive, NIL if not
+ */
+
+long mtx_ping (MAILSTREAM *stream)
+{
+ unsigned long i = 1;
+ long r = T;
+ int ld;
+ char lock[MAILTMPLEN];
+ struct stat sbuf;
+ if (stream && LOCAL) { /* only if stream already open */
+ fstat (LOCAL->fd,&sbuf); /* get current file poop */
+ if (LOCAL->filetime && !(LOCAL->mustcheck || LOCAL->shouldcheck) &&
+ (LOCAL->filetime < sbuf.st_mtime)) LOCAL->shouldcheck = T;
+ /* check for changed message status */
+ if (LOCAL->mustcheck || LOCAL->shouldcheck) {
+ LOCAL->filetime = sbuf.st_mtime;
+ if (LOCAL->shouldcheck) /* babble when we do this unilaterally */
+ mm_notify (stream,"[CHECK] Checking for flag updates",NIL);
+ while (i <= stream->nmsgs) mtx_elt (stream,i++);
+ LOCAL->mustcheck = LOCAL->shouldcheck = NIL;
+ }
+ /* get shared parse/append permission */
+ if ((sbuf.st_size != LOCAL->filesize) &&
+ ((ld = lockname (lock,stream->mailbox,LOCK_SH)) >= 0)) {
+ /* parse resulting mailbox */
+ r = (mtx_parse (stream)) ? T : NIL;
+ unlockfd (ld,lock); /* release shared parse/append permission */
+ }
+ }
+ return r; /* return result of the parse */
+}
+
+
+/* MTX mail check mailbox (reparses status too)
+ * Accepts: MAIL stream
+ */
+
+void mtx_check (MAILSTREAM *stream)
+{
+ /* mark that a check is desired */
+ if (LOCAL) LOCAL->mustcheck = T;
+ if (mtx_ping (stream)) mm_log ("Check completed",(long) NIL);
+}
+\f
+/* MTX mail expunge mailbox
+ * sequence to expunge if non-NIL
+ * expunge options
+ * Returns: T, always
+ */
+
+long mtx_expunge (MAILSTREAM *stream,char *sequence,long options)
+{
+ long ret;
+ struct utimbuf times;
+ struct stat sbuf;
+ off_t pos = 0;
+ int ld;
+ unsigned long i = 1;
+ unsigned long j,k,m,recent;
+ unsigned long n = 0;
+ unsigned long delta = 0;
+ char lock[MAILTMPLEN];
+ MESSAGECACHE *elt;
+ if (!(ret = (sequence ? ((options & EX_UID) ?
+ mail_uid_sequence (stream,sequence) :
+ mail_sequence (stream,sequence)) : LONGT) &&
+ mtx_ping (stream))); /* parse sequence if given, ping stream */
+ else if (stream->rdonly) mm_log ("Expunge ignored on readonly mailbox",WARN);
+ else {
+ if (LOCAL->filetime && !LOCAL->shouldcheck) {
+ fstat (LOCAL->fd,&sbuf); /* get current write time */
+ if (LOCAL->filetime < sbuf.st_mtime) LOCAL->shouldcheck = T;
+ }
+ /* get exclusive parse/append permission */
+ if ((ld = lockname (lock,stream->mailbox,LOCK_EX)) < 0)
+ mm_log ("Unable to lock expunge mailbox",ERROR);
+ /* make sure see any newly-arrived messages */
+ else if (!mtx_parse (stream));
+ /* get exclusive access */
+ else if (flock (LOCAL->fd,LOCK_EX|LOCK_NB)) {
+ flock (LOCAL->fd,LOCK_SH);/* recover previous lock */
+ mm_log ("Can't expunge because mailbox is in use by another process",
+ ERROR);
+ unlockfd (ld,lock); /* release exclusive parse/append permission */
+ }
+\f
+ else {
+ mm_critical (stream); /* go critical */
+ recent = stream->recent; /* get recent now that pinged and locked */
+ /* for each message */
+ while (i <= stream->nmsgs) {
+ /* get cache element */
+ elt = mtx_elt (stream,i);
+ /* number of bytes to smash or preserve */
+ k = elt->private.special.text.size + elt->rfc822_size;
+ /* if need to expunge this message */
+ if (elt->deleted && (sequence ? elt->sequence : T)) {
+ /* if recent, note one less recent message */
+ if (elt->recent) --recent;
+ delta += k; /* number of bytes to delete */
+ /* notify upper levels */
+ mail_expunged (stream,i);
+ n++; /* count up one more expunged message */
+ }
+ else if (i++ && delta) {/* preserved message */
+ /* first byte to preserve */
+ j = elt->private.special.offset;
+ do { /* read from source position */
+ m = min (k,LOCAL->buflen);
+ lseek (LOCAL->fd,j,L_SET);
+ read (LOCAL->fd,LOCAL->buf,m);
+ pos = j - delta; /* write to destination position */
+ while (T) {
+ lseek (LOCAL->fd,pos,L_SET);
+ if (write (LOCAL->fd,LOCAL->buf,m) > 0) break;
+ mm_notify (stream,strerror (errno),WARN);
+ mm_diskerror (stream,errno,T);
+ }
+ pos += m; /* new position */
+ j += m; /* next chunk, perhaps */
+ } while (k -= m); /* until done */
+ /* note the new address of this text */
+ elt->private.special.offset -= delta;
+ }
+ /* preserved but no deleted messages */
+ else pos = elt->private.special.offset + k;
+ }
+ if (n) { /* truncate file after last message */
+ if (pos != (LOCAL->filesize -= delta)) {
+ sprintf (LOCAL->buf,
+ "Calculated size mismatch %lu != %lu, delta = %lu",
+ (unsigned long) pos,(unsigned long) LOCAL->filesize,delta);
+ mm_log (LOCAL->buf,WARN);
+ LOCAL->filesize = pos;/* fix it then */
+ }
+ ftruncate (LOCAL->fd,LOCAL->filesize);
+ sprintf (LOCAL->buf,"Expunged %lu messages",n);
+ /* output the news */
+ mm_log (LOCAL->buf,(long) NIL);
+ }
+ else mm_log ("No messages deleted, so no update needed",(long) NIL);
+ fsync (LOCAL->fd); /* force disk update */
+ fstat (LOCAL->fd,&sbuf); /* get new write time */
+ times.modtime = LOCAL->filetime = sbuf.st_mtime;
+ times.actime = time (0); /* reset atime to now */
+ utime (stream->mailbox,×);
+ mm_nocritical (stream); /* release critical */
+ /* notify upper level of new mailbox size */
+ mail_exists (stream,stream->nmsgs);
+ mail_recent (stream,recent);
+ flock (LOCAL->fd,LOCK_SH);/* allow sharers again */
+ unlockfd (ld,lock); /* release exclusive parse/append permission */
+ }
+ }
+ return ret;
+}
+\f
+/* MTX mail copy message(s)
+ * Accepts: MAIL stream
+ * sequence
+ * destination mailbox
+ * copy options
+ * Returns: T if success, NIL if failed
+ */
+
+long mtx_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options)
+{
+ struct stat sbuf;
+ struct utimbuf times;
+ MESSAGECACHE *elt;
+ unsigned long i,j,k;
+ long ret = LONGT;
+ int fd,ld;
+ char file[MAILTMPLEN],lock[MAILTMPLEN];
+ mailproxycopy_t pc =
+ (mailproxycopy_t) mail_parameters (stream,GET_MAILPROXYCOPY,NIL);
+ /* make sure valid mailbox */
+ if (!mtx_isvalid (mailbox,file)) switch (errno) {
+ case ENOENT: /* no such file? */
+ mm_notify (stream,"[TRYCREATE] Must create mailbox before copy",NIL);
+ return NIL;
+ case 0: /* merely empty file? */
+ break;
+ case EACCES: /* file protected */
+ sprintf (LOCAL->buf,"Can't access destination: %.80s",mailbox);
+ MM_LOG (LOCAL->buf,ERROR);
+ return NIL;
+ case EINVAL:
+ if (pc) return (*pc) (stream,sequence,mailbox,options);
+ sprintf (LOCAL->buf,"Invalid MTX-format mailbox name: %.80s",mailbox);
+ mm_log (LOCAL->buf,ERROR);
+ return NIL;
+ default:
+ if (pc) return (*pc) (stream,sequence,mailbox,options);
+ sprintf (LOCAL->buf,"Not a MTX-format mailbox: %.80s",mailbox);
+ mm_log (LOCAL->buf,ERROR);
+ return NIL;
+ }
+ if (!((options & CP_UID) ? mail_uid_sequence (stream,sequence) :
+ mail_sequence (stream,sequence))) return NIL;
+ /* got file? */
+ if ((fd = open (file,O_BINARY|O_RDWR|O_CREAT,S_IREAD|S_IWRITE)) < 0) {
+ sprintf (LOCAL->buf,"Unable to open copy mailbox: %.80s",strerror (errno));
+ mm_log (LOCAL->buf,ERROR);
+ return NIL;
+ }
+ mm_critical (stream); /* go critical */
+ /* get exclusive parse/append permission */
+ if (flock (fd,LOCK_SH) || ((ld = lockname (lock,file,LOCK_EX)) < 0)) {
+ mm_log ("Unable to lock copy mailbox",ERROR);
+ mm_nocritical (stream);
+ return NIL;
+ }
+ fstat (fd,&sbuf); /* get current file size */
+ lseek (fd,sbuf.st_size,L_SET);/* move to end of file */
+\f
+ /* for each requested message */
+ for (i = 1; ret && (i <= stream->nmsgs); i++)
+ if ((elt = mail_elt (stream,i))->sequence) {
+ lseek (LOCAL->fd,elt->private.special.offset,L_SET);
+ /* number of bytes to copy */
+ k = elt->private.special.text.size + elt->rfc822_size;
+ do { /* read from source position */
+ j = min (k,LOCAL->buflen);
+ read (LOCAL->fd,LOCAL->buf,j);
+ if (write (fd,LOCAL->buf,j) < 0) ret = NIL;
+ } while (ret && (k -= j));/* until done */
+ }
+ /* make sure all the updates take */
+ if (!(ret && (ret = !fsync (fd)))) {
+ sprintf (LOCAL->buf,"Unable to write message: %s",strerror (errno));
+ mm_log (LOCAL->buf,ERROR);
+ ftruncate (fd,sbuf.st_size);
+ }
+ /* set atime to now-1 if successful copy */
+ if (ret) times.actime = time (0) - 1;
+ /* else preserved \Marked status */
+ else times.actime = (sbuf.st_ctime > sbuf.st_atime) ?
+ sbuf.st_atime : time (0);
+ times.modtime = sbuf.st_mtime;/* preserve mtime */
+ utime (file,×); /* set the times */
+ unlockfd (ld,lock); /* release exclusive parse/append permission */
+ close (fd); /* close the file */
+ mm_nocritical (stream); /* release critical */
+ /* delete all requested messages */
+ if (ret && (options & CP_MOVE)) {
+ for (i = 1; i <= stream->nmsgs; i++)
+ if ((elt = mtx_elt (stream,i))->sequence) {
+ elt->deleted = T; /* mark message deleted */
+ /* recalculate status */
+ mtx_update_status (stream,i,NIL);
+ }
+ if (!stream->rdonly) { /* make sure the update takes */
+ fsync (LOCAL->fd);
+ fstat (LOCAL->fd,&sbuf); /* get current write time */
+ times.modtime = LOCAL->filetime = sbuf.st_mtime;
+ times.actime = time (0); /* make sure atime remains greater */
+ utime (stream->mailbox,×);
+ }
+ }
+ if (ret && mail_parameters (NIL,GET_COPYUID,NIL))
+ mm_log ("Can not return meaningful COPYUID with this mailbox format",WARN);
+ return ret;
+}
+\f
+/* MTX mail append message from stringstruct
+ * Accepts: MAIL stream
+ * destination mailbox
+ * append callback
+ * data for callback
+ * Returns: T if append successful, else NIL
+ */
+
+long mtx_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data)
+{
+ struct stat sbuf;
+ int fd,ld,c;
+ char *flags,*date,tmp[MAILTMPLEN],file[MAILTMPLEN],lock[MAILTMPLEN];
+ struct utimbuf times;
+ FILE *df;
+ MESSAGECACHE elt;
+ long f;
+ unsigned long i,uf;
+ STRING *message;
+ long ret = LONGT;
+ /* default stream to prototype */
+ if (!stream) stream = &mtxproto;
+ /* make sure valid mailbox */
+ if (!mtx_isvalid (mailbox,file)) switch (errno) {
+ case ENOENT: /* no such file? */
+ if (!compare_cstring (mailbox,"INBOX")) mtx_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 EACCES: /* file protected */
+ sprintf (tmp,"Can't access destination: %.80s",mailbox);
+ MM_LOG (tmp,ERROR);
+ return NIL;
+ case EINVAL:
+ sprintf (tmp,"Invalid MTX-format mailbox name: %.80s",mailbox);
+ mm_log (tmp,ERROR);
+ return NIL;
+ default:
+ sprintf (tmp,"Not a MTX-format mailbox: %.80s",mailbox);
+ mm_log (tmp,ERROR);
+ return NIL;
+ }
+ /* get first message */
+ if (!(*af) (stream,data,&flags,&date,&message)) return NIL;
+\f
+ /* open destination mailbox */
+ if (((fd = open (file,O_BINARY|O_WRONLY|O_APPEND|O_CREAT,S_IREAD|S_IWRITE))
+ < 0) || !(df = fdopen (fd,"ab"))) {
+ sprintf (tmp,"Can't open append mailbox: %s",strerror (errno));
+ mm_log (tmp,ERROR);
+ return NIL;
+ }
+ /* get parse/append permission */
+ if (flock (fd,LOCK_SH) || ((ld = lockname (lock,file,LOCK_EX)) < 0)) {
+ mm_log ("Unable to lock append mailbox",ERROR);
+ close (fd);
+ return NIL;
+ }
+ mm_critical (stream); /* go critical */
+ fstat (fd,&sbuf); /* get current file size */
+ errno = 0;
+ do { /* parse flags */
+ if (!SIZE (message)) { /* guard against zero-length */
+ mm_log ("Append of zero-length message",ERROR);
+ ret = NIL;
+ break;
+ }
+ f = mail_parse_flags (stream,flags,&i);
+ /* reverse bits (dontcha wish we had CIRC?) */
+ for (uf = 0; i; uf |= 1 << (29 - find_rightmost_bit (&i)));
+ if (date) { /* parse date if given */
+ if (!mail_parse_date (&elt,date)) {
+ sprintf (tmp,"Bad date in append: %.80s",date);
+ mm_log (tmp,ERROR);
+ ret = NIL; /* mark failure */
+ break;
+ }
+ mail_date (tmp,&elt); /* write preseved date */
+ }
+ else internal_date (tmp); /* get current date in IMAP format */
+ /* write header */
+ if (fprintf (df,"%s,%lu;%010lo%02lo\015\012",tmp,i = SIZE (message),uf,
+ (unsigned long) f) < 0) ret = NIL;
+ else { /* write message */
+ if (i) do c = 0xff & SNX (message);
+ while ((putc (c,df) != EOF) && --i);
+ /* get next message */
+ if (i || !(*af) (stream,data,&flags,&date,&message)) ret = NIL;
+ }
+ } while (ret && message);
+ /* if error... */
+ if (!ret || (fflush (df) == EOF)) {
+ ftruncate (fd,sbuf.st_size);/* revert file */
+ close (fd); /* make sure fclose() doesn't corrupt us */
+ if (errno) {
+ sprintf (tmp,"Message append failed: %s",strerror (errno));
+ mm_log (tmp,ERROR);
+ }
+ ret = NIL;
+ }
+ if (ret) times.actime = time (0) - 1;
+ /* else preserved \Marked status */
+ else times.actime = (sbuf.st_ctime > sbuf.st_atime) ?
+ sbuf.st_atime : time (0);
+ times.modtime = sbuf.st_mtime;/* preserve mtime */
+ utime (file,×); /* set the times */
+ fclose (df); /* close the file */
+ unlockfd (ld,lock); /* release exclusive parse/append permission */
+ mm_nocritical (stream); /* release critical */
+ if (ret && mail_parameters (NIL,GET_APPENDUID,NIL))
+ mm_log ("Can not return meaningful APPENDUID with this mailbox format",
+ WARN);
+ return ret;
+}
+\f
+/* Internal routines */
+
+
+/* MTX mail parse mailbox
+ * Accepts: MAIL stream
+ * Returns: T if parse OK
+ * NIL if failure, stream aborted
+ */
+
+long mtx_parse (MAILSTREAM *stream)
+{
+ struct stat sbuf;
+ MESSAGECACHE *elt = NIL;
+ unsigned char c,*s,*t,*x;
+ char tmp[MAILTMPLEN];
+ unsigned long i,j;
+ long curpos = LOCAL->filesize;
+ long nmsgs = stream->nmsgs;
+ long recent = stream->recent;
+ short added = NIL;
+ short silent = stream->silent;
+ fstat (LOCAL->fd,&sbuf); /* get status */
+ if (sbuf.st_size < curpos) { /* sanity check */
+ sprintf (tmp,"Mailbox shrank from %ld to %ld!",curpos,sbuf.st_size);
+ mm_log (tmp,ERROR);
+ mtx_close (stream,NIL);
+ return NIL;
+ }
+ stream->silent = T; /* don't pass up mm_exists() events yet */
+ while (sbuf.st_size - curpos){/* while there is stuff to parse */
+ /* get to that position in the file */
+ lseek (LOCAL->fd,curpos,L_SET);
+ if ((i = read (LOCAL->fd,LOCAL->buf,64)) <= 0) {
+ sprintf (tmp,"Unable to read internal header at %lu, size = %lu: %s",
+ (unsigned long) curpos,(unsigned long) sbuf.st_size,
+ i ? strerror (errno) : "no data read");
+ mm_log (tmp,ERROR);
+ mtx_close (stream,NIL);
+ return NIL;
+ }
+ LOCAL->buf[i] = '\0'; /* tie off buffer just in case */
+ if (!((s = strchr (LOCAL->buf,'\015')) && (s[1] == '\012'))) {
+ sprintf (tmp,"Unable to find CRLF at %lu in %lu bytes, text: %s",
+ (unsigned long) curpos,i,(char *) LOCAL->buf);
+ mm_log (tmp,ERROR);
+ mtx_close (stream,NIL);
+ return NIL;
+ }
+ *s = '\0'; /* tie off header line */
+ i = (s + 2) - LOCAL->buf; /* note start of text offset */
+ if (!((s = strchr (LOCAL->buf,',')) && (t = strchr (s+1,';')))) {
+ sprintf (tmp,"Unable to parse internal header at %lu: %s",
+ (unsigned long) curpos,(char *) LOCAL->buf);
+ mm_log (tmp,ERROR);
+ mtx_close (stream,NIL);
+ return NIL;
+ }
+ *s++ = '\0'; *t++ = '\0'; /* tie off fields */
+\f
+ added = T; /* note that a new message was added */
+ /* swell the cache */
+ mail_exists (stream,++nmsgs);
+ /* instantiate an elt for this message */
+ (elt = mail_elt (stream,nmsgs))->valid = T;
+ elt->private.uid = ++stream->uid_last;
+ /* note file offset of header */
+ elt->private.special.offset = curpos;
+ /* in case error */
+ elt->private.special.text.size = 0;
+ /* header size not known yet */
+ elt->private.msg.header.text.size = 0;
+ x = s; /* parse the header components */
+ if (mail_parse_date (elt,LOCAL->buf) &&
+ (elt->rfc822_size = strtoul (s,(char **) &s,10)) && (!(s && *s)) &&
+ isdigit (t[0]) && 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]) && !t[12])
+ elt->private.special.text.size = i;
+ else { /* oops */
+ sprintf (tmp,"Unable to parse internal header elements at %ld: %s,%s;%s",
+ curpos,(char *) LOCAL->buf,(char *) x,(char *) t);
+ mm_log (tmp,ERROR);
+ mtx_close (stream,NIL);
+ return NIL;
+ }
+ /* make sure didn't run off end of file */
+ if ((curpos += (elt->rfc822_size + i)) > sbuf.st_size) {
+ sprintf (tmp,"Last message (at %lu) runs past end of file (%lu > %lu)",
+ elt->private.special.offset,(unsigned long) curpos,
+ (unsigned long) sbuf.st_size);
+ mm_log (tmp,ERROR);
+ mtx_close (stream,NIL);
+ return NIL;
+ }
+ c = t[10]; /* remember first system flags byte */
+ t[10] = '\0'; /* tie off flags */
+ j = strtoul (t,NIL,8); /* get user flags value */
+ t[10] = c; /* restore first system flags byte */
+ /* set up all valid user flags (reversed!) */
+ while (j) if (((i = 29 - find_rightmost_bit (&j)) < NUSERFLAGS) &&
+ stream->user_flags[i]) elt->user_flags |= 1 << i;
+ /* calculate system flags */
+ if ((j = ((t[10]-'0') * 8) + t[11]-'0') & fSEEN) elt->seen = T;
+ if (j & fDELETED) elt->deleted = T;
+ if (j & fFLAGGED) elt->flagged = T;
+ if (j & fANSWERED) elt->answered = T;
+ if (j & fDRAFT) elt->draft = T;
+ if (!(j & fOLD)) { /* newly arrived message? */
+ elt->recent = T;
+ recent++; /* count up a new recent message */
+ /* mark it as old */
+ mtx_update_status (stream,nmsgs,NIL);
+ }
+ }
+ fsync (LOCAL->fd); /* make sure all the fOLD flags take */
+ /* update parsed file size and time */
+ LOCAL->filesize = sbuf.st_size;
+ fstat (LOCAL->fd,&sbuf); /* get status again to ensure time is right */
+ LOCAL->filetime = sbuf.st_mtime;
+ if (added && !stream->rdonly){/* make sure atime updated */
+ struct utimbuf times;
+ times.actime = time (0);
+ times.modtime = LOCAL->filetime;
+ utime (stream->mailbox,×);
+ }
+ stream->silent = silent; /* can pass up events now */
+ mail_exists (stream,nmsgs); /* notify upper level of new mailbox size */
+ mail_recent (stream,recent); /* and of change in recent messages */
+ return LONGT; /* return the winnage */
+}
+\f
+/* MTX get cache element with status updating from file
+ * Accepts: MAIL stream
+ * message number
+ * Returns: cache element
+ */
+
+MESSAGECACHE *mtx_elt (MAILSTREAM *stream,unsigned long msgno)
+{
+ MESSAGECACHE *elt = mail_elt (stream,msgno);
+ 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;
+ mtx_read_flags (stream,elt);
+ 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))
+ mm_flags (stream,msgno); /* let top level know */
+ return elt;
+}
+\f
+/* MTX read flags from file
+ * Accepts: MAIL stream
+ * Returns: cache element
+ */
+
+void mtx_read_flags (MAILSTREAM *stream,MESSAGECACHE *elt)
+{
+ unsigned long i,j;
+ /* noop if readonly and have valid flags */
+ if (stream->rdonly && elt->valid) return;
+ /* set the seek pointer */
+ lseek (LOCAL->fd,(off_t) elt->private.special.offset +
+ elt->private.special.text.size - 14,L_SET);
+ /* read the new flags */
+ if (read (LOCAL->fd,LOCAL->buf,12) < 0) {
+ sprintf (LOCAL->buf,"Unable to read new status: %s",strerror (errno));
+ fatal (LOCAL->buf);
+ }
+ /* calculate system flags */
+ i = (((LOCAL->buf[10]-'0') * 8) + LOCAL->buf[11]-'0');
+ elt->seen = i & fSEEN ? T : NIL; elt->deleted = i & fDELETED ? T : NIL;
+ elt->flagged = i & fFLAGGED ? T : NIL;
+ elt->answered = i & fANSWERED ? T : NIL; elt->draft = i & fDRAFT ? T : NIL;
+ LOCAL->buf[10] = '\0'; /* tie off flags */
+ j = strtoul(LOCAL->buf,NIL,8);/* get user flags value */
+ /* set up all valid user flags (reversed!) */
+ while (j) if (((i = 29 - find_rightmost_bit (&j)) < NUSERFLAGS) &&
+ stream->user_flags[i]) elt->user_flags |= 1 << i;
+ elt->valid = T; /* have valid flags now */
+}
+\f
+/* MTX update status string
+ * Accepts: MAIL stream
+ * message number
+ * flag saying whether or not to sync
+ */
+
+void mtx_update_status (MAILSTREAM *stream,unsigned long msgno,long syncflag)
+{
+ struct utimbuf times;
+ struct stat sbuf;
+ MESSAGECACHE *elt = mail_elt (stream,msgno);
+ unsigned long j,k = 0;
+ /* readonly */
+ if (stream->rdonly || !elt->valid) mtx_read_flags (stream,elt);
+ else { /* readwrite */
+ j = elt->user_flags; /* get user flags */
+ /* reverse bits (dontcha wish we had CIRC?) */
+ while (j) k |= 1 << (29 - find_rightmost_bit (&j));
+ /* print new flag string */
+ sprintf (LOCAL->buf,"%010lo%02o",k,(unsigned)
+ (fOLD + (fSEEN * elt->seen) + (fDELETED * elt->deleted) +
+ (fFLAGGED * elt->flagged) + (fANSWERED * elt->answered) +
+ (fDRAFT * elt->draft)));
+ while (T) { /* get to that place in the file */
+ lseek (LOCAL->fd,(off_t) elt->private.special.offset +
+ elt->private.special.text.size - 14,L_SET);
+ /* write new flags */
+ if (write (LOCAL->fd,LOCAL->buf,12) > 0) break;
+ mm_notify (stream,strerror (errno),WARN);
+ mm_diskerror (stream,errno,T);
+ }
+ if (syncflag) { /* sync if requested */
+ fsync (LOCAL->fd);
+ fstat (LOCAL->fd,&sbuf); /* get new write time */
+ times.modtime = LOCAL->filetime = sbuf.st_mtime;
+ times.actime = time (0); /* make sure read is later */
+ utime (stream->mailbox,×);
+ }
+ }
+}
+\f
+/* MTX locate header for a message
+ * Accepts: MAIL stream
+ * message number
+ * pointer to returned header size
+ * Returns: position of header in file
+ */
+
+unsigned long mtx_hdrpos (MAILSTREAM *stream,unsigned long msgno,
+ unsigned long *size)
+{
+ unsigned long siz;
+ long i = 0;
+ int q = 0;
+ char *s,tmp[MAILTMPLEN];
+ MESSAGECACHE *elt = mtx_elt (stream,msgno);
+ unsigned long ret = elt->private.special.offset +
+ elt->private.special.text.size;
+ /* is header size known? */
+ if (!(*size = elt->private.msg.header.text.size)) {
+ lseek (LOCAL->fd,ret,L_SET);/* get to header position */
+ /* search message for CRLF CRLF */
+ for (siz = 1,s = tmp; siz <= elt->rfc822_size; siz++) {
+ /* read another buffer as necessary */
+ if ((--i <= 0) && /* buffer empty? */
+ (read (LOCAL->fd,s = tmp,
+ i = min (elt->rfc822_size - siz,(long) MAILTMPLEN)) < 0))
+ return ret; /* I/O error? */
+ switch (q) { /* sniff at buffer */
+ case 0: /* first character */
+ q = (*s++ == '\015') ? 1 : 0;
+ break;
+ case 1: /* second character */
+ q = (*s++ == '\012') ? 2 : 0;
+ break;
+ case 2: /* third character */
+ q = (*s++ == '\015') ? 3 : 0;
+ break;
+ case 3: /* fourth character */
+ if (*s++ == '\012') { /* have the sequence? */
+ /* yes, note for later */
+ elt->private.msg.header.text.size = *size = siz;
+ return ret;
+ }
+ q = 0; /* lost... */
+ break;
+ }
+ }
+ /* header consumes entire message */
+ elt->private.msg.header.text.size = *size = elt->rfc822_size;
+ }
+ return ret;
+}
projects / uw-imap / commitdiff