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/* ========================================================================
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* Copyright 1988-2007 University of Washington
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* ========================================================================
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* Program: MBX mail routines
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* Author: Mark Crispin
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* Networks and Distributed Computing
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* Computing & Communications
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* University of Washington
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* Administration Building, AG-44
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* Internet: MRC@CAC.Washington.EDU
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* Date: 3 October 1995
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* Last Edited: 5 January 2007
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/* FILE TIME SEMANTICS
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* The atime is the last read time of the file.
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* The mtime is the last flags update time of the file.
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* The ctime is the last write time of the file.
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extern int errno; /* just in case */
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#include <sys/utime.h>
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/* Build parameters */
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/* MBX I/O stream local data */
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typedef struct mbx_local {
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unsigned int flagcheck: 1; /* if ping should sweep for flags */
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unsigned int expok: 1; /* if expunging OK in ping */
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unsigned int expunged : 1; /* if one or more expunged messages */
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int fd; /* file descriptor for I/O */
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int ld; /* lock file descriptor */
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int ffuserflag; /* first free user flag */
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off_t filesize; /* file size parsed */
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time_t filetime; /* last file time */
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time_t lastsnarf; /* last snarf time */
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unsigned char *buf; /* temporary buffer */
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unsigned long buflen; /* current size of temporary buffer */
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char lock[MAILTMPLEN]; /* buffer to write lock name */
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/* Convenient access to local data */
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#define LOCAL ((MBXLOCAL *) stream->local)
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/* Function prototypes */
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DRIVER *mbx_valid (char *name);
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int mbx_isvalid (MAILSTREAM **stream,char *name,char *file,long flags);
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void *mbx_parameters (long function,void *value);
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void mbx_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents);
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void mbx_list (MAILSTREAM *stream,char *ref,char *pat);
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void mbx_lsub (MAILSTREAM *stream,char *ref,char *pat);
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long mbx_create (MAILSTREAM *stream,char *mailbox);
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long mbx_delete (MAILSTREAM *stream,char *mailbox);
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long mbx_rename (MAILSTREAM *stream,char *old,char *newname);
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long mbx_status (MAILSTREAM *stream,char *mbx,long flags);
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MAILSTREAM *mbx_open (MAILSTREAM *stream);
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void mbx_close (MAILSTREAM *stream,long options);
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void mbx_abort (MAILSTREAM *stream);
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void mbx_flags (MAILSTREAM *stream,char *sequence,long flags);
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char *mbx_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *length,
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long mbx_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags);
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void mbx_flag (MAILSTREAM *stream,char *sequence,char *flag,long flags);
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void mbx_flagmsg (MAILSTREAM *stream,MESSAGECACHE *elt);
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long mbx_ping (MAILSTREAM *stream);
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void mbx_check (MAILSTREAM *stream);
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long mbx_expunge (MAILSTREAM *stream,char *sequence,long options);
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void mbx_snarf (MAILSTREAM *stream);
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long mbx_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options);
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long mbx_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data);
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long mbx_parse (MAILSTREAM *stream);
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MESSAGECACHE *mbx_elt (MAILSTREAM *stream,unsigned long msgno,long expok);
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unsigned long mbx_read_flags (MAILSTREAM *stream,MESSAGECACHE *elt);
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void mbx_update_header (MAILSTREAM *stream);
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void mbx_update_status (MAILSTREAM *stream,unsigned long msgno,long flags);
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unsigned long mbx_hdrpos (MAILSTREAM *stream,unsigned long msgno,
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unsigned long *size,char **hdr);
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unsigned long mbx_rewrite (MAILSTREAM *stream,unsigned long *reclaimed,
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long mbx_flaglock (MAILSTREAM *stream);
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/* MBX mail routines */
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/* Driver dispatch used by MAIL */
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"mbx", /* driver name */
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DR_LOCAL|DR_MAIL|DR_CRLF|DR_LOCKING,
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(DRIVER *) NIL, /* next driver */
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mbx_valid, /* mailbox is valid for us */
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mbx_parameters, /* manipulate parameters */
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mbx_scan, /* scan mailboxes */
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mbx_list, /* list mailboxes */
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mbx_lsub, /* list subscribed mailboxes */
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NIL, /* subscribe to mailbox */
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NIL, /* unsubscribe from mailbox */
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mbx_create, /* create mailbox */
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mbx_delete, /* delete mailbox */
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mbx_rename, /* rename mailbox */
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mail_status_default, /* status of mailbox */
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mbx_open, /* open mailbox */
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mbx_close, /* close mailbox */
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mbx_flags, /* fetch message "fast" attributes */
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mbx_flags, /* fetch message flags */
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NIL, /* fetch overview */
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NIL, /* fetch message envelopes */
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mbx_header, /* fetch message header */
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mbx_text, /* fetch message body */
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NIL, /* fetch partial message text */
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NIL, /* unique identifier */
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NIL, /* message number */
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mbx_flag, /* modify flags */
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mbx_flagmsg, /* per-message modify flags */
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NIL, /* search for message based on criteria */
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NIL, /* sort messages */
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NIL, /* thread messages */
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mbx_ping, /* ping mailbox to see if still alive */
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mbx_check, /* check for new messages */
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mbx_expunge, /* expunge deleted messages */
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mbx_copy, /* copy messages to another mailbox */
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mbx_append, /* append string message to mailbox */
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NIL /* garbage collect stream */
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/* prototype stream */
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MAILSTREAM mbxproto = {&mbxdriver};
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/* MBX mail validate mailbox
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* Accepts: mailbox name
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* Returns: our driver if name is valid, NIL otherwise
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DRIVER *mbx_valid (char *name)
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char tmp[MAILTMPLEN];
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int fd = mbx_isvalid (NIL,name,tmp,NIL);
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if (fd < 0) return NIL;
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close (fd); /* don't need the fd now */
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/* MBX mail test for valid mailbox
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* Accepts: returned stream with valid mailbox keywords
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* buffer to write file name
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* RW flags or NIL for readonly
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* Returns: file descriptor if valid, NIL otherwise
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#define MBXISVALIDNOUID 0x1 /* RW, don't do UID action */
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#define MBXISVALIDUID 0x2 /* RW, do UID action */
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int mbx_isvalid (MAILSTREAM **stream,char *name,char *file,long flags)
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char c,*s,*t,hdr[HDRSIZE];
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struct utimbuf times;
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errno = EINVAL; /* assume invalid argument */
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/* if file, get its status */
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if ((s = dummy_file (file,name)) && !stat (s,&sbuf) &&
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((sbuf.st_mode & S_IFMT) == S_IFREG) &&
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((fd = open (file,(flags ? O_RDWR : O_RDONLY)|O_BINARY,NIL)) >= 0)) {
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errno = -1; /* assume bogus format */
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if (((((j = read (fd,hdr,HDRSIZE)) == HDRSIZE) && (hdr[0] == '*')) ||
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/* locked, set byte 0 to "*", read rest */
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((j < 0) && (lseek (fd,1,L_SET) == 1) &&
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(read (fd,hdr+1,HDRSIZE-1) == (HDRSIZE-1)) && (hdr[0] = '*'))) &&
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(hdr[1] == 'm') && (hdr[2] == 'b') && (hdr[3] == 'x') &&
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(hdr[4] == '*') && (hdr[5] == '\015') && (hdr[6] == '\012') &&
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isxdigit (hdr[7]) && isxdigit (hdr[8]) && isxdigit (hdr[9]) &&
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isxdigit (hdr[10]) && isxdigit (hdr[11]) && isxdigit (hdr[12]) &&
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isxdigit (hdr[13]) && isxdigit (hdr[14]) && isxdigit (c = hdr[15]) &&
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isxdigit (hdr[16]) && isxdigit (hdr[17]) && isxdigit (hdr[18]) &&
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isxdigit (hdr[19]) && isxdigit (hdr[20]) && isxdigit (hdr[21]) &&
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isxdigit (hdr[22]) && (hdr[23] == '\015') && (hdr[24] == '\012')) {
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if (stream) { /* stream specified? */
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*stream = (MAILSTREAM *) memset (fs_get (sizeof (MAILSTREAM)),0,
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sizeof (MAILSTREAM));
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hdr[15] = '\0'; /* tie off UIDVALIDITY */
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(*stream)->uid_validity = strtoul (hdr+7,NIL,16);
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hdr[15] = c; /* now get UIDLAST */
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(*stream)->uid_last = strtoul (hdr+15,NIL,16);
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/* parse user flags */
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for (i = 0, s = hdr + 25;
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(i < NUSERFLAGS) && (t = strchr (s,'\015')) && (t - s);
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*t = '\0'; /* tie off flag */
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if (strlen (s) <= MAXUSERFLAG)
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(*stream)->user_flags[i] = cpystr (s);
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/* make sure have true UIDLAST */
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if (flags & MBXISVALIDUID) {
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for (upd = NIL,pos = 2048, k = 0; pos < sbuf.st_size;
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/* read header for this message */
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lseek (fd,pos,L_SET);
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if ((j = read (fd,hdr,64)) >= 0) {
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if ((s = strchr (hdr,'\015')) && (s[1] == '\012')) {
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if ((s = strchr (hdr,',')) && (j = strtol (s+1,&s,10)) &&
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(*s == ';') && (s = strchr (s+1,'-'))) {
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/* get UID if there is any */
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i = strtoul (++s,&t,16);
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if (!*t && (t == (s + 8)) && (i <= (*stream)->uid_last)) {
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lseek (fd,pos + s - hdr,L_SET);
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sprintf (hdr,"%08lx",++(*stream)->uid_last);
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ret = -1; /* error, give up */
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*stream = mail_close (*stream);
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pos = sbuf.st_size + 1;
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if (upd) { /* need to update hdr with new UIDLAST? */
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sprintf (hdr,"%08lx",(*stream)->uid_last);
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if (ret != fd) close (fd); /* close the file */
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else lseek (fd,0,L_SET); /* else rewind to start */
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/* \Marked status? */
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if (sbuf.st_ctime > sbuf.st_atime) {
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/* preserve atime and mtime */
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times.actime = sbuf.st_atime;
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times.modtime = sbuf.st_mtime;
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utime (file,×); /* set the times */
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/* in case INBOX but not mbx format */
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else if ((errno == ENOENT) && !compare_cstring (name,"INBOX")) errno = -1;
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return ret; /* return what we should */
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/* MBX manipulate driver parameters
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* Accepts: function code
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* function-dependent value
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* Returns: function-dependent return value
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void *mbx_parameters (long function,void *value)
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switch ((int) function) {
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case SET_ONETIMEEXPUNGEATPING:
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if (value) ((MBXLOCAL *) ((MAILSTREAM *) value)->local)->expok = T;
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case GET_ONETIMEEXPUNGEATPING:
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if (value) ret = (void *)
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(((MBXLOCAL *) ((MAILSTREAM *) value)->local)->expok ? VOIDT : NIL);
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/* MBX mail scan mailboxes
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* Accepts: mail stream
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void mbx_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents)
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if (stream) dummy_scan (NIL,ref,pat,contents);
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/* MBX mail list mailboxes
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* Accepts: mail stream
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void mbx_list (MAILSTREAM *stream,char *ref,char *pat)
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if (stream) dummy_list (NIL,ref,pat);
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/* MBX mail list subscribed mailboxes
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* Accepts: mail stream
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void mbx_lsub (MAILSTREAM *stream,char *ref,char *pat)
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if (stream) dummy_lsub (NIL,ref,pat);
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/* MBX mail create mailbox
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* Accepts: MAIL stream
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* mailbox name to create
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* Returns: T on success, NIL on failure
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long mbx_create (MAILSTREAM *stream,char *mailbox)
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char *s,mbx[MAILTMPLEN],tmp[HDRSIZE];
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if (!(s = dummy_file (mbx,mailbox))) {
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sprintf (mbx,"Can't create %.80s: invalid name",mailbox);
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/* create underlying file */
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else if (dummy_create (stream,s)) {
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/* done if made directory */
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if ((s = strrchr (s,'\\')) && !s[1]) return T;
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if ((fd = open (mbx,O_WRONLY|O_BINARY,NIL)) < 0) {
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sprintf (tmp,"Can't reopen mailbox node %.80s: %s",mbx,strerror (errno));
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unlink (mbx); /* delete the file */
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memset (tmp,'\0',HDRSIZE);/* initialize header */
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sprintf (s = tmp,"*mbx*\015\012%08lx00000000\015\012",
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(unsigned long) time (0));
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for (i = 0; i < NUSERFLAGS; ++i)
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sprintf (s += strlen (s),"%s\015\012",
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(stream && stream->user_flags[i]) ? stream->user_flags[i] :
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if (write (fd,tmp,HDRSIZE) != HDRSIZE) {
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sprintf (tmp,"Can't initialize mailbox node %.80s: %s",
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mbx,strerror (errno));
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unlink (mbx); /* delete the file */
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else ret = T; /* success */
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close (fd); /* close file */
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/* MBX mail delete mailbox
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* Accepts: MAIL stream
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* mailbox name to delete
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* Returns: T on success, NIL on failure
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long mbx_delete (MAILSTREAM *stream,char *mailbox)
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return mbx_rename (stream,mailbox,NIL);
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/* MBX mail rename mailbox
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* Accepts: MAIL stream
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* new mailbox name (or NIL for delete)
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* Returns: T on success, NIL on failure
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long mbx_rename (MAILSTREAM *stream,char *old,char *newname)
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char c,*s,tmp[MAILTMPLEN],file[MAILTMPLEN],lock[MAILTMPLEN];
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if (!dummy_file (file,old) ||
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(newname && (!((s = mailboxfile (tmp,newname)) && *s) ||
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((s = strrchr (tmp,'\\')) && !s[1])))) {
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sprintf (tmp,newname ?
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"Can't rename mailbox %.80s to %.80s: invalid name" :
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"Can't delete mailbox %.80s: invalid name",
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else if ((fd = open (file,O_RDWR|O_BINARY,NIL)) < 0) {
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sprintf (tmp,"Can't open mailbox %.80s: %s",old,strerror (errno));
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/* get parse/append permission */
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if ((ld = lockname (lock,file,LOCK_EX)) < 0) {
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mm_log ("Unable to lock rename mailbox",ERROR);
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/* lock out other users */
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if (flock (fd,LOCK_EX|LOCK_NB)) {
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close (fd); /* couldn't lock, give up on it then */
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sprintf (tmp,"Mailbox %.80s is in use by another process",old);
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unlockfd (ld,lock); /* release exclusive parse/append permission */
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if (newname) { /* want rename? */
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/* found superior to destination name? */
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if ((s = strrchr (tmp,'\\')) && (s != tmp) &&
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((tmp[1] != ':') || (s != tmp + 2))) {
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c = s[1]; /* remember character after delimiter */
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*s = s[1] = '\0'; /* tie off name at delimiter */
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/* name doesn't exist, create it */
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if (stat (tmp,&sbuf) || ((sbuf.st_mode & S_IFMT) != S_IFDIR)) {
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*s = '\\'; /* restore delimiter */
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if (!dummy_create (stream,tmp)) ret = NIL;
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else *s = '\\'; /* restore delimiter */
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s[1] = c; /* restore character after delimiter */
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flock (fd,LOCK_UN); /* release lock on the file */
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close (fd); /* pacify NTFS */
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/* rename the file */
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if (ret && rename (file,tmp)) {
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sprintf (tmp,"Can't rename mailbox %.80s to %.80s: %s",old,newname,
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ret = NIL; /* set failure */
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flock (fd,LOCK_UN); /* release lock on the file */
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close (fd); /* pacify NTFS */
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sprintf (tmp,"Can't delete mailbox %.80s: %s",old,strerror (errno));
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ret = NIL; /* set failure */
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unlockfd (ld,lock); /* release exclusive parse/append permission */
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/* recreate file if renamed INBOX */
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if (ret && !compare_cstring (old,"INBOX")) mbx_create (NIL,"INBOX");
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return ret; /* return success */
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* Accepts: stream to open
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* Returns: stream on success, NIL on failure
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MAILSTREAM *mbx_open (MAILSTREAM *stream)
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char tmp[MAILTMPLEN];
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if (!stream) return &mbxproto;/* return prototype for OP_PROTOTYPE call */
497
if (stream->local) fatal ("mbx recycle stream");
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/* canonicalize the mailbox name */
499
if (!dummy_file (tmp,stream->mailbox)) {
500
sprintf (tmp,"Can't open - invalid name: %.80s",stream->mailbox);
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if (stream->rdonly ||
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(fd = open (tmp,O_RDWR|O_BINARY,NIL)) < 0) {
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if ((fd = open (tmp,O_RDONLY|O_BINARY,NIL)) < 0) {
506
sprintf (tmp,"Can't open mailbox: %s",strerror (errno));
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else if (!stream->rdonly) { /* got it, but readonly */
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mm_log ("Can't get write access to mailbox, access is readonly",WARN);
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stream->local = memset (fs_get (sizeof (MBXLOCAL)),NIL,sizeof (MBXLOCAL));
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LOCAL->fd = fd; /* bind the file */
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LOCAL->ld = -1; /* no flaglock */
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LOCAL->buf = (char *) fs_get (CHUNKSIZE);
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LOCAL->buflen = CHUNKSIZE - 1;
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/* note if an INBOX or not */
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stream->inbox = !compare_cstring (stream->mailbox,"INBOX");
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fs_give ((void **) &stream->mailbox);
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stream->mailbox = cpystr (tmp);
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/* get parse/append permission */
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if ((ld = lockname (tmp,stream->mailbox,LOCK_EX)) < 0) {
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mm_log ("Unable to lock open mailbox",ERROR);
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flock (LOCAL->fd,LOCK_SH); /* lock the file */
531
unlockfd (ld,tmp); /* release shared parse permission */
532
LOCAL->filesize = HDRSIZE; /* initialize parsed file size */
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LOCAL->filetime = 0; /* time not set up yet */
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LOCAL->expok = LOCAL->flagcheck = NIL;
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stream->sequence++; /* bump sequence number */
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stream->nmsgs = stream->recent = 0;
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silent = stream->silent; /* defer events */
540
if (mbx_ping (stream) && !stream->nmsgs)
541
mm_log ("Mailbox is empty",(long) NIL);
542
stream->silent = silent; /* now notify upper level */
543
mail_exists (stream,stream->nmsgs);
544
mail_recent (stream,stream->recent);
545
if (!LOCAL) return NIL; /* failure if stream died */
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stream->perm_seen = stream->perm_deleted = stream->perm_flagged =
547
stream->perm_answered = stream->perm_draft = stream->rdonly ? NIL : T;
548
stream->perm_user_flags = stream->rdonly ? NIL : 0xffffffff;
549
stream->kwd_create = (stream->user_flags[NUSERFLAGS-1] || stream->rdonly) ?
550
NIL : T; /* can we create new user flags? */
551
return stream; /* return stream to caller */
555
* Accepts: MAIL stream
559
void mbx_close (MAILSTREAM *stream,long options)
561
if (stream && LOCAL) { /* only if a file is open */
562
int silent = stream->silent;
563
stream->silent = T; /* note this stream is dying */
564
/* do an expunge if requested */
565
if (options & CL_EXPUNGE) mbx_expunge (stream,NIL,NIL);
566
else { /* otherwise do a checkpoint to purge */
567
LOCAL->expok = T; /* possible expunged messages */
570
stream->silent = silent; /* restore previous status */
576
/* MBX mail abort stream
577
* Accepts: MAIL stream
580
void mbx_abort (MAILSTREAM *stream)
582
if (stream && LOCAL) { /* only if a file is open */
583
flock (LOCAL->fd,LOCK_UN); /* unlock local file */
584
close (LOCAL->fd); /* close the local file */
585
/* free local text buffer */
586
if (LOCAL->buf) fs_give ((void **) &LOCAL->buf);
587
/* nuke the local data */
588
fs_give ((void **) &stream->local);
589
stream->dtb = NIL; /* log out the DTB */
594
/* MBX mail fetch flags
595
* Accepts: MAIL stream
598
* Sniffs at file to see if some other process changed the flags
601
void mbx_flags (MAILSTREAM *stream,char *sequence,long flags)
605
if (mbx_ping (stream) && /* ping mailbox, get new status for messages */
606
((flags & FT_UID) ? mail_uid_sequence (stream,sequence) :
607
mail_sequence (stream,sequence)))
608
for (i = 1; i <= stream->nmsgs; i++)
609
if ((elt = mail_elt (stream,i))->sequence && !elt->valid)
610
mbx_elt (stream,i,NIL);
613
/* MBX mail fetch message header
614
* Accepts: MAIL stream
616
* pointer to returned header text length
618
* Returns: message header in RFC822 format
621
char *mbx_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *length,
626
*length = 0; /* default to empty */
627
if (flags & FT_UID) return "";/* UID call "impossible" */
628
/* get header position, possibly header */
629
i = mbx_hdrpos (stream,msgno,length,&s);
630
if (!s) { /* mbx_hdrpos() returned header? */
631
lseek (LOCAL->fd,i,L_SET); /* no, get to header position */
632
/* is buffer big enough? */
633
if (*length > LOCAL->buflen) {
634
fs_give ((void **) &LOCAL->buf);
635
LOCAL->buf = (char *) fs_get ((LOCAL->buflen = *length) + 1);
638
read (LOCAL->fd,s = LOCAL->buf,*length);
640
s[*length] = '\0'; /* tie off string */
644
/* MBX mail fetch message text (body only)
645
* Accepts: MAIL stream
647
* pointer to returned header text length
652
long mbx_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags)
657
/* UID call "impossible" */
658
if (flags & FT_UID) return NIL;
659
/* get message status */
660
elt = mbx_elt (stream,msgno,NIL);
661
/* if message not seen */
662
if (!(flags & FT_PEEK) && !elt->seen && mbx_flaglock (stream)) {
663
elt->seen = T; /* mark message as seen */
664
/* recalculate status */
665
mbx_update_status (stream,msgno,NIL);
666
mm_flags (stream,msgno);
668
mbx_flag (stream,NIL,NIL,NIL);
670
if (LOCAL) { /* find header position */
671
i = mbx_hdrpos (stream,msgno,&j,NIL);
672
d.fd = LOCAL->fd; /* set up file descriptor */
674
d.chunk = LOCAL->buf; /* initial buffer chunk */
675
d.chunksize = CHUNKSIZE;
676
INIT (bs,fd_string,&d,elt->rfc822_size - j);
678
else i = 0; /* mbx_flaglock() could have aborted */
679
return T; /* success */
682
/* MBX mail modify flags
683
* Accepts: MAIL stream
689
void mbx_flag (MAILSTREAM *stream,char *sequence,char *flag,long flags)
691
struct utimbuf times;
693
/* make sure the update takes */
694
if (!stream->rdonly && LOCAL && (LOCAL->fd >= 0) && (LOCAL->ld >= 0)) {
696
fstat (LOCAL->fd,&sbuf); /* get current write time */
697
times.modtime = LOCAL->filetime = sbuf.st_mtime;
699
if ((LOCAL->ffuserflag < NUSERFLAGS) &&
700
stream->user_flags[LOCAL->ffuserflag]) mbx_update_header (stream);
701
times.actime = time (0); /* make sure read comes after all that */
702
utime (stream->mailbox,×);
703
unlockfd (LOCAL->ld,LOCAL->lock);
709
/* MBX mail per-message modify flags
710
* Accepts: MAIL stream
711
* message cache element
714
void mbx_flagmsg (MAILSTREAM *stream,MESSAGECACHE *elt)
716
if (mbx_flaglock (stream)) mbx_update_status (stream,elt->msgno,NIL);
719
/* MBX mail ping mailbox
720
* Accepts: MAIL stream
721
* Returns: T if stream still alive, NIL if not
724
long mbx_ping (MAILSTREAM *stream)
729
char lock[MAILTMPLEN];
732
if (stream && LOCAL) { /* only if stream already open */
733
ret = LONGT; /* assume OK */
734
fstat (LOCAL->fd,&sbuf); /* get current file poop */
735
/* allow expunge if permitted at ping */
736
if (mail_parameters (NIL,GET_EXPUNGEATPING,NIL)) LOCAL->expok = T;
737
/* if external modification */
738
if (LOCAL->filetime && (LOCAL->filetime < sbuf.st_mtime))
739
LOCAL->flagcheck = T; /* upgrade to flag checking */
740
/* new mail or flagcheck handling needed? */
741
if (((i = (sbuf.st_size - LOCAL->filesize)) || LOCAL->flagcheck ||
743
((ld = lockname (lock,stream->mailbox,LOCK_EX)) >= 0)) {
744
if (LOCAL->flagcheck) { /* sweep mailbox for changed message status */
745
if (ret = mbx_parse (stream)) {
746
LOCAL->filetime = sbuf.st_mtime;
747
for (i = 1; i <= stream->nmsgs; )
748
if (mbx_elt (stream,i,LOCAL->expok)) ++i;
749
LOCAL->flagcheck =NIL;/* got all the updates */
752
else if (i) ret = mbx_parse (stream);
753
unlockfd (ld,lock); /* release shared parse/append permission */
755
if (ret) { /* must still be alive */
756
if (!LOCAL->expunged) /* look for holes if none known yet */
757
for (i = 1, pos = HDRSIZE;
758
!LOCAL->expunged && (i <= stream->nmsgs);
759
i++, pos += elt->private.special.text.size + elt->rfc822_size)
760
if ((elt = mail_elt (stream,i))->private.special.offset != pos)
761
LOCAL->expunged = T;/* found a hole */
763
if (LOCAL->expunged && !stream->rdonly) {
764
if (mbx_rewrite (stream,&i,NIL)) fatal ("expunge on check");
765
if (i) { /* any space reclaimed? */
766
LOCAL->expunged = NIL;/* no more pending expunge */
767
sprintf (LOCAL->buf,"Reclaimed %lu bytes of expunged space",i);
768
mm_log (LOCAL->buf,(long) NIL);
771
LOCAL->expok = NIL; /* no more expok */
774
return ret; /* return result of the parse */
777
/* MBX mail check mailbox (reparses status too)
778
* Accepts: MAIL stream
781
void mbx_check (MAILSTREAM *stream)
783
if (LOCAL) LOCAL->expok = T; /* mark that a check is desired */
784
if (mbx_ping (stream)) mm_log ("Check completed",(long) NIL);
788
/* MBX mail expunge mailbox
789
* Accepts: MAIL stream
790
* sequence to expunge if non-NIL
792
* Returns: T if success, NIL if failure
795
long mbx_expunge (MAILSTREAM *stream,char *sequence,long options)
798
unsigned long nexp,reclaimed;
799
if (ret = sequence ? ((options & EX_UID) ?
800
mail_uid_sequence (stream,sequence) :
801
mail_sequence (stream,sequence)) : LONGT) {
802
if (!mbx_ping (stream)); /* do nothing if stream dead */
803
else if (stream->rdonly) /* won't do on readonly files! */
804
mm_log ("Expunge ignored on readonly mailbox",WARN);
805
/* if expunged any messages */
806
else if (nexp = mbx_rewrite (stream,&reclaimed,sequence ? -1 : 1)) {
807
sprintf (LOCAL->buf,"Expunged %lu messages",nexp);
808
mm_log (LOCAL->buf,(long) NIL);
810
else if (reclaimed) { /* or if any prior expunged space reclaimed */
811
sprintf (LOCAL->buf,"Reclaimed %lu bytes of expunged space",reclaimed);
812
mm_log (LOCAL->buf,(long) NIL);
814
else mm_log ("No messages deleted, so no update needed",(long) NIL);
819
/* MBX mail copy message(s)
820
* Accepts: MAIL stream
822
* destination mailbox
824
* Returns: T if success, NIL if failed
827
long mbx_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options)
830
struct utimbuf times;
832
unsigned long i,j,k,m;
835
char *s,*t,file[MAILTMPLEN],lock[MAILTMPLEN];
837
(mailproxycopy_t) mail_parameters (stream,GET_MAILPROXYCOPY,NIL);
838
copyuid_t cu = (copyuid_t) mail_parameters (NIL,GET_COPYUID,NIL);
839
SEARCHSET *source = cu ? mail_newsearchset () : NIL;
840
SEARCHSET *dest = cu ? mail_newsearchset () : NIL;
841
MAILSTREAM *dstream = NIL;
842
if (!((options & CP_UID) ? mail_uid_sequence (stream,sequence) :
843
mail_sequence (stream,sequence))) return NIL;
844
/* make sure valid mailbox */
845
if ((fd = mbx_isvalid (&dstream,mailbox,file,
846
cu ? MBXISVALIDUID : MBXISVALIDNOUID)) < 0)
848
case ENOENT: /* no such file? */
849
mm_notify (stream,"[TRYCREATE] Must create mailbox before copy",NIL);
852
if (pc) return (*pc) (stream,sequence,mailbox,options);
853
sprintf (LOCAL->buf,"Invalid MBX-format mailbox name: %.80s",mailbox);
854
mm_log (LOCAL->buf,ERROR);
857
if (pc) return (*pc) (stream,sequence,mailbox,options);
858
sprintf (LOCAL->buf,"Not a MBX-format mailbox: %.80s",mailbox);
859
mm_log (LOCAL->buf,ERROR);
863
if ((fd = open (dummy_file (file,mailbox),O_RDWR|O_CREAT|O_BINARY,
864
S_IREAD|S_IWRITE)) < 0) {
865
sprintf (LOCAL->buf,"Unable to open copy mailbox: %s",strerror (errno));
866
mm_log (LOCAL->buf,ERROR);
869
mm_critical (stream); /* go critical */
870
/* get parse/append permission */
871
if (flock (fd,LOCK_SH) || ((ld = lockname (lock,file,LOCK_EX)) < 0)) {
872
mm_log ("Unable to lock copy mailbox",ERROR);
873
mm_nocritical (stream);
876
fstat (fd,&sbuf); /* get current file size */
877
lseek (fd,sbuf.st_size,L_SET);/* move to end of file */
879
/* for each requested message */
880
for (i = 1; ret && (i <= stream->nmsgs); i++)
881
if ((elt = mail_elt (stream,i))->sequence) {
882
lseek (LOCAL->fd,elt->private.special.offset +
883
elt->private.special.text.size,L_SET);
884
mail_date(LOCAL->buf,elt);/* build target header */
885
/* get target keyword mask */
886
for (j = elt->user_flags, k = 0; j; )
887
if (s = stream->user_flags[find_rightmost_bit (&j)])
888
for (m = 0; (m < NUSERFLAGS) && (t = dstream->user_flags[m]); m++)
889
if (!compare_cstring (s,t) && (k |= 1 << m)) break;
890
sprintf (LOCAL->buf+strlen(LOCAL->buf),",%lu;%08lx%04x-%08lx\015\012",
891
elt->rfc822_size,k,(unsigned)
892
((fSEEN * elt->seen) + (fDELETED * elt->deleted) +
893
(fFLAGGED * elt->flagged) + (fANSWERED * elt->answered) +
894
(fDRAFT * elt->draft)),cu ? ++dstream->uid_last : 0);
895
/* write target header */
896
if (ret = (write (fd,LOCAL->buf,strlen (LOCAL->buf)) > 0)) {
897
for (k = elt->rfc822_size; ret && (j = min (k,LOCAL->buflen)); k -= j){
898
read (LOCAL->fd,LOCAL->buf,j);
899
ret = write (fd,LOCAL->buf,j) >= 0;
901
if (cu) { /* need to pass back new UID? */
902
mail_append_set (source,mail_uid (stream,i));
903
mail_append_set (dest,dstream->uid_last);
908
/* make sure all the updates take */
909
if (!(ret && (ret = !fsync (fd)))) {
910
sprintf (LOCAL->buf,"Unable to write message: %s",strerror (errno));
911
mm_log (LOCAL->buf,ERROR);
912
ftruncate (fd,sbuf.st_size);
914
if (cu && ret) { /* return sets if doing COPYUID */
915
(*cu) (stream,mailbox,dstream->uid_validity,source,dest);
916
lseek (fd,15,L_SET); /* update UIDLAST */
917
sprintf (LOCAL->buf,"%08lx",dstream->uid_last);
918
write (fd,LOCAL->buf,8);
920
else { /* flush any sets we may have built */
921
mail_free_searchset (&source);
922
mail_free_searchset (&dest);
924
/* set atime to now-1 if successful copy */
925
if (ret) times.actime = time (0) - 1;
926
/* else preserved \Marked status */
927
else times.actime = (sbuf.st_ctime > sbuf.st_atime) ?
928
sbuf.st_atime : time (0);
929
times.modtime = sbuf.st_mtime;/* preserve mtime */
930
utime (file,×); /* set the times */
931
unlockfd (ld,lock); /* release exclusive parse/append permission */
932
close (fd); /* close the file */
933
mm_nocritical (stream); /* release critical */
934
/* delete all requested messages */
935
if (ret && (options & CP_MOVE) && mbx_flaglock (stream)) {
936
for (i = 1; i <= stream->nmsgs; i++) if (mail_elt (stream,i)->sequence) {
937
/* mark message deleted */
938
mbx_elt (stream,i,NIL)->deleted = T;
939
/* recalculate status */
940
mbx_update_status (stream,i,NIL);
943
mbx_flag (stream,NIL,NIL,NIL);
945
if (dstream != stream) mail_close (dstream);
949
/* MBX mail append message from stringstruct
950
* Accepts: MAIL stream
951
* destination mailbox
954
* Returns: T if append successful, else NIL
957
long mbx_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data)
961
char *flags,*date,tmp[MAILTMPLEN],file[MAILTMPLEN],lock[MAILTMPLEN];
962
struct utimbuf times;
969
MAILSTREAM *dstream = NIL;
970
appenduid_t au = (appenduid_t) mail_parameters (NIL,GET_APPENDUID,NIL);
971
SEARCHSET *dst = au ? mail_newsearchset () : NIL;
972
/* make sure valid mailbox */
973
/* make sure valid mailbox */
974
if ((fd = mbx_isvalid (&dstream,mailbox,file,
975
au ? MBXISVALIDUID : MBXISVALIDNOUID)) < 0)
977
case ENOENT: /* no such file? */
978
if (compare_cstring (mailbox,"INBOX")) {
979
mm_notify (stream,"[TRYCREATE] Must create mailbox before append",NIL);
982
/* can create INBOX here */
983
mbx_create (dstream = stream ? stream : &mbxproto,"INBOX");
986
sprintf (tmp,"Invalid MBX-format mailbox name: %.80s",mailbox);
990
sprintf (tmp,"Not a MBX-format mailbox: %.80s",mailbox);
995
/* get first message */
996
if (!(*af) (dstream,data,&flags,&date,&message)) close (fd);
997
/* get parse/append permission */
998
else if (flock (fd,LOCK_SH) || ((ld = lockname (lock,file,LOCK_EX)) < 0)) {
999
mm_log ("Unable to lock append mailbox",ERROR);
1002
else if (!(df = fdopen (fd,"r+b"))) {
1003
MM_LOG ("Unable to reopen append mailbox",ERROR);
1008
mm_critical (dstream); /* go critical */
1009
fstat (fd,&sbuf); /* get current file size */
1010
fseek (df,sbuf.st_size,SEEK_SET);
1012
for (ret = LONGT; ret && message; ) {
1013
if (!SIZE (message)) { /* guard against zero-length */
1014
mm_log ("Append of zero-length message",ERROR);
1018
f = mail_parse_flags (dstream,flags,&uf);
1019
if (date) { /* parse date if given */
1020
if (!mail_parse_date (&elt,date)) {
1021
sprintf (tmp,"Bad date in append: %.80s",date);
1023
ret = NIL; /* mark failure */
1026
mail_date (tmp,&elt); /* write preseved date */
1028
else internal_date (tmp); /* get current date in IMAP format */
1030
if (fprintf (df,"%s,%lu;%08lx%04lx-%08lx\015\012",tmp,i = SIZE (message),
1031
uf,(unsigned long) f,++dstream->uid_last) < 0) ret = NIL;
1032
else { /* write message */
1034
if (!message->cursize) SETPOS (message,GETPOS (message));
1035
while (i && (j = fwrite (message->curpos,1,message->cursize,df))) {
1037
SETPOS (message,GETPOS (message) + j);
1039
/* get next message */
1040
if (i || !(*af) (dstream,data,&flags,&date,&message)) ret = NIL;
1041
else if (au) mail_append_set (dst,dstream->uid_last);
1046
if (!ret || (fflush (df) == EOF)) {
1048
ftruncate (fd,sbuf.st_size);
1049
close (fd); /* make sure fclose() doesn't corrupt us */
1051
sprintf (tmp,"Message append failed: %s",strerror (errno));
1056
/* return sets if doing APPENDUID */
1057
if (au && ret) (*au) (mailbox,dstream->uid_validity,dst);
1058
else mail_free_searchset (&dst);
1059
fseek (df,15,SEEK_SET); /* update UIDLAST */
1060
fprintf (df,"%08lx",dstream->uid_last);
1061
if (ret) times.actime = time (0) - 1;
1062
/* else preserve \Marked status */
1063
else times.actime = (sbuf.st_ctime > sbuf.st_atime) ?
1064
sbuf.st_atime : time (0);
1065
/* preserve mtime */
1066
times.modtime = sbuf.st_mtime;
1067
utime (file,×); /* set the times */
1068
fclose (df); /* close the file */
1069
unlockfd (ld,lock); /* release exclusive parse/append permission */
1070
mm_nocritical (dstream); /* release critical */
1072
if (dstream != stream) mail_close (dstream);
1076
/* Internal routines */
1079
/* MBX mail parse mailbox
1080
* Accepts: MAIL stream
1081
* Returns: T if parse OK
1082
* NIL if failure, stream aborted
1085
long mbx_parse (MAILSTREAM *stream)
1088
MESSAGECACHE *elt = NIL;
1089
unsigned char c,*s,*t,*x;
1090
char tmp[MAILTMPLEN];
1091
unsigned long i,j,k,m;
1092
off_t curpos = LOCAL->filesize;
1093
unsigned long nmsgs = stream->nmsgs;
1094
unsigned long recent = stream->recent;
1095
unsigned long lastuid = 0;
1098
short silent = stream->silent;
1100
fstat (LOCAL->fd,&sbuf); /* get status */
1101
if (sbuf.st_size < curpos) { /* sanity check */
1102
sprintf (tmp,"Mailbox shrank from %lu to %lu!",
1103
(unsigned long) curpos,(unsigned long) sbuf.st_size);
1108
lseek (LOCAL->fd,0,L_SET); /* rewind file */
1109
/* read internal header */
1110
read (LOCAL->fd,LOCAL->buf,HDRSIZE);
1111
LOCAL->buf[HDRSIZE] = '\0'; /* tie off header */
1112
c = LOCAL->buf[15]; /* save first character of last UID */
1113
LOCAL->buf[15] = '\0';
1114
/* parse UID validity */
1115
stream->uid_validity = strtoul (LOCAL->buf + 7,NIL,16);
1116
LOCAL->buf[15] = c; /* restore first character of last UID */
1117
/* parse last UID */
1118
i = strtoul (LOCAL->buf + 15,NIL,16);
1119
stream->uid_last = stream->rdonly ? max (i,stream->uid_last) : i;
1120
/* parse user flags */
1121
for (i = 0, s = LOCAL->buf + 25;
1122
(i < NUSERFLAGS) && (t = strchr (s,'\015')) && (t - s);
1124
*t = '\0'; /* tie off flag */
1125
if (!stream->user_flags[i] && (strlen (s) <= MAXUSERFLAG))
1126
stream->user_flags[i] = cpystr (s);
1128
LOCAL->ffuserflag = (int) i; /* first free user flag */
1130
stream->silent = T; /* don't pass up mm_exists() events yet */
1131
while (sbuf.st_size - curpos){/* while there is stuff to parse */
1132
/* get to that position in the file */
1133
lseek (LOCAL->fd,curpos,L_SET);
1134
if ((i = read (LOCAL->fd,LOCAL->buf,64)) <= 0) {
1135
sprintf (tmp,"Unable to read internal header at %lu, size = %lu: %s",
1136
(unsigned long) curpos,(unsigned long) sbuf.st_size,
1137
i ? strerror (errno) : "no data read");
1142
LOCAL->buf[i] = '\0'; /* tie off buffer just in case */
1143
if (!((s = strchr (LOCAL->buf,'\015')) && (s[1] == '\012'))) {
1144
sprintf (tmp,"Unable to find CRLF at %lu in %lu bytes, text: %.80s",
1145
(unsigned long) curpos,i,(char *) LOCAL->buf);
1150
*s = '\0'; /* tie off header line */
1151
i = (s + 2) - LOCAL->buf; /* note start of text offset */
1152
if (!((s = strchr (LOCAL->buf,',')) && (t = strchr (s+1,';')))) {
1153
sprintf (tmp,"Unable to parse internal header at %lu: %.80s",
1154
(unsigned long) curpos,(char *) LOCAL->buf);
1159
if (!(isxdigit (t[1]) && isxdigit (t[2]) && isxdigit (t[3]) &&
1160
isxdigit (t[4]) && isxdigit (t[5]) && isxdigit (t[6]) &&
1161
isxdigit (t[7]) && isxdigit (t[8]) && isxdigit (t[9]) &&
1162
isxdigit (t[10]) && isxdigit (t[11]) && isxdigit (t[12]))) {
1163
sprintf (tmp,"Unable to parse message flags at %lu: %.80s",
1164
(unsigned long) curpos,(char *) LOCAL->buf);
1169
if ((t[13] != '-') || t[22] ||
1170
!(isxdigit (t[14]) && isxdigit (t[15]) && isxdigit (t[16]) &&
1171
isxdigit (t[17]) && isxdigit (t[18]) && isxdigit (t[19]) &&
1172
isxdigit (t[20]) && isxdigit (t[21]))) {
1173
sprintf (tmp,"Unable to parse message UID at %lu: %.80s",
1174
(unsigned long) curpos,(char *) LOCAL->buf);
1180
*s++ = '\0'; *t++ = '\0'; /* break up fields */
1181
/* get message size */
1182
if (!(j = strtoul (s,(char **) &x,10)) && (!(x && *x))) {
1183
sprintf (tmp,"Unable to parse message size at %lu: %.80s,%.80s;%.80s",
1184
(unsigned long) curpos,(char *) LOCAL->buf,(char *) s,
1190
/* make sure didn't run off end of file */
1191
if (((off_t) (curpos + i + j)) > sbuf.st_size) {
1192
sprintf (tmp,"Last message (at %lu) runs past end of file (%lu > %lu)",
1193
(unsigned long) curpos,(unsigned long) (curpos + i + j),
1194
(unsigned long) sbuf.st_size);
1200
if ((m = strtoul (t+13,NIL,16)) &&
1201
((m <= lastuid) || (m > stream->uid_last))) {
1203
sprintf (tmp,"Invalid UID %08lx in message %lu, rebuilding UIDs",
1207
/* restart UID validity */
1208
stream->uid_validity = (unsigned long) time (0);
1210
m = 0; /* lose this UID */
1211
dirty = T; /* mark dirty, set new lastuid */
1212
stream->uid_last = lastuid;
1215
t[12] = '\0'; /* parse system flags */
1216
if ((k = strtoul (t+8,NIL,16)) & fEXPUNGED) {
1217
if (m) lastuid = m; /* expunge message, update last UID seen */
1218
else { /* no UID assigned? */
1219
lastuid = ++stream->uid_last;
1223
else { /* not expunged, swell the cache */
1224
added = T; /* note that a new message was added */
1225
mail_exists (stream,++nmsgs);
1226
/* instantiate an elt for this message */
1227
(elt = mail_elt (stream,nmsgs))->valid = T;
1228
/* parse the date */
1229
if (!mail_parse_date (elt,LOCAL->buf)) {
1230
sprintf (tmp,"Unable to parse message date at %lu: %.80s",
1231
(unsigned long) curpos,(char *) LOCAL->buf);
1236
/* note file offset of header */
1237
elt->private.special.offset = curpos;
1238
/* and internal header size */
1239
elt->private.special.text.size = i;
1240
/* header size not known yet */
1241
elt->private.msg.header.text.size = 0;
1242
elt->rfc822_size = j; /* note message size */
1243
/* calculate system flags */
1244
if (k & fSEEN) elt->seen = T;
1245
if (k & fDELETED) elt->deleted = T;
1246
if (k & fFLAGGED) elt->flagged = T;
1247
if (k & fANSWERED) elt->answered = T;
1248
if (k & fDRAFT) elt->draft = T;
1249
t[8] = '\0'; /* get user flags value */
1250
elt->user_flags = strtoul (t,NIL,16);
1251
/* UID already assigned? */
1252
if (!(elt->private.uid = m) || !(k & fOLD)) {
1253
elt->recent = T; /* no, mark as recent */
1254
++recent; /* count up a new recent message */
1255
dirty = T; /* and must rewrite header */
1256
/* assign new UID */
1257
if (!elt->private.uid) elt->private.uid = ++stream->uid_last;
1258
mbx_update_status (stream,elt->msgno,NIL);
1260
/* update last parsed UID */
1261
lastuid = elt->private.uid;
1263
curpos += i + j; /* update position */
1266
if (dirty && !stream->rdonly){/* update header */
1267
mbx_update_header (stream);
1268
fsync (LOCAL->fd); /* make sure all the UID updates take */
1270
/* update parsed file size and time */
1271
LOCAL->filesize = sbuf.st_size;
1272
fstat (LOCAL->fd,&sbuf); /* get status again to ensure time is right */
1273
LOCAL->filetime = sbuf.st_mtime;
1274
if (added && !stream->rdonly){/* make sure atime updated */
1275
struct utimbuf times;
1276
times.actime = time (0);
1277
times.modtime = LOCAL->filetime;
1278
utime (stream->mailbox,×);
1280
stream->silent = silent; /* can pass up events now */
1281
mail_exists (stream,nmsgs); /* notify upper level of new mailbox size */
1282
mail_recent (stream,recent); /* and of change in recent messages */
1283
return LONGT; /* return the winnage */
1286
/* MBX get cache element with status updating from file
1287
* Accepts: MAIL stream
1290
* Returns: cache element
1293
MESSAGECACHE *mbx_elt (MAILSTREAM *stream,unsigned long msgno,long expok)
1295
MESSAGECACHE *elt = mail_elt (stream,msgno);
1296
struct { /* old flags */
1297
unsigned int seen : 1;
1298
unsigned int deleted : 1;
1299
unsigned int flagged : 1;
1300
unsigned int answered : 1;
1301
unsigned int draft : 1;
1302
unsigned long user_flags;
1304
old.seen = elt->seen; old.deleted = elt->deleted; old.flagged = elt->flagged;
1305
old.answered = elt->answered; old.draft = elt->draft;
1306
old.user_flags = elt->user_flags;
1308
if (mbx_read_flags (stream,elt) && expok) {
1309
mail_expunged (stream,elt->msgno);
1310
return NIL; /* return this message was expunged */
1312
if ((old.seen != elt->seen) || (old.deleted != elt->deleted) ||
1313
(old.flagged != elt->flagged) || (old.answered != elt->answered) ||
1314
(old.draft != elt->draft) || (old.user_flags != elt->user_flags))
1315
mm_flags (stream,msgno); /* let top level know */
1319
/* MBX read flags from file
1320
* Accepts: MAIL stream
1322
* Returns: non-NIL if message expunged
1325
unsigned long mbx_read_flags (MAILSTREAM *stream,MESSAGECACHE *elt)
1329
fstat (LOCAL->fd,&sbuf); /* get status */
1330
/* make sure file size is good */
1331
if (sbuf.st_size < LOCAL->filesize) {
1332
sprintf (LOCAL->buf,"Mailbox shrank from %lu to %lu in flag read!",
1333
(unsigned long) LOCAL->filesize,(unsigned long) sbuf.st_size);
1336
/* set the seek pointer */
1337
lseek (LOCAL->fd,(off_t) elt->private.special.offset +
1338
elt->private.special.text.size - 24,L_SET);
1339
/* read the new flags */
1340
if (read (LOCAL->fd,LOCAL->buf,14) < 0) {
1341
sprintf (LOCAL->buf,"Unable to read new status: %s",strerror (errno));
1344
if ((LOCAL->buf[0] != ';') || (LOCAL->buf[13] != '-')) {
1345
LOCAL->buf[14] = '\0'; /* tie off buffer for error message */
1346
sprintf (LOCAL->buf+50,"Invalid flags for message %lu (%lu %lu): %s",
1347
elt->msgno,elt->private.special.offset,
1348
elt->private.special.text.size,(char *) LOCAL->buf);
1349
fatal (LOCAL->buf+50);
1351
LOCAL->buf[13] = '\0'; /* tie off buffer */
1352
/* calculate system flags */
1353
i = strtoul (LOCAL->buf+9,NIL,16);
1354
elt->seen = i & fSEEN ? T : NIL;
1355
elt->deleted = i & fDELETED ? T : NIL;
1356
elt->flagged = i & fFLAGGED ? T : NIL;
1357
elt->answered = i & fANSWERED ? T : NIL;
1358
elt->draft = i & fDRAFT ? T : NIL;
1359
LOCAL->expunged |= i & fEXPUNGED ? T : NIL;
1360
LOCAL->buf[9] = '\0'; /* tie off flags */
1361
/* get user flags value */
1362
elt->user_flags = strtoul (LOCAL->buf+1,NIL,16);
1363
elt->valid = T; /* have valid flags now */
1364
return i & fEXPUNGED;
1367
/* MBX update header
1368
* Accepts: MAIL stream
1371
#define NTKLUDGEOFFSET 7
1373
void mbx_update_header (MAILSTREAM *stream)
1376
char *s = LOCAL->buf;
1377
memset (s,'\0',HDRSIZE); /* initialize header */
1378
sprintf (s,"*mbx*\015\012%08lx%08lx\015\012",
1379
stream->uid_validity,stream->uid_last);
1380
for (i = 0; (i < NUSERFLAGS) && stream->user_flags[i]; ++i)
1381
sprintf (s += strlen (s),"%s\015\012",stream->user_flags[i]);
1382
LOCAL->ffuserflag = i; /* first free user flag */
1383
/* can we create more user flags? */
1384
stream->kwd_create = (i < NUSERFLAGS) ? T : NIL;
1385
/* write reserved lines */
1386
while (i++ < NUSERFLAGS) strcat (s,"\015\012");
1387
while (T) { /* rewind file */
1388
lseek (LOCAL->fd,NTKLUDGEOFFSET,L_SET);
1389
/* write new header */
1390
if (write (LOCAL->fd,LOCAL->buf + NTKLUDGEOFFSET,
1391
HDRSIZE - NTKLUDGEOFFSET) > 0) break;
1392
mm_notify (stream,strerror (errno),WARN);
1393
mm_diskerror (stream,errno,T);
1397
/* MBX update status string
1398
* Accepts: MAIL stream
1403
void mbx_update_status (MAILSTREAM *stream,unsigned long msgno,long flags)
1406
MESSAGECACHE *elt = mail_elt (stream,msgno);
1408
if (stream->rdonly || !elt->valid) mbx_read_flags (stream,elt);
1409
else { /* readwrite */
1410
fstat (LOCAL->fd,&sbuf); /* get status */
1411
/* make sure file size is good */
1412
if (sbuf.st_size < LOCAL->filesize) {
1413
sprintf (LOCAL->buf,"Mailbox shrank from %lu to %lu in flag update!",
1414
(unsigned long) LOCAL->filesize,(unsigned long) sbuf.st_size);
1417
/* set the seek pointer */
1418
lseek (LOCAL->fd,(off_t) elt->private.special.offset +
1419
elt->private.special.text.size - 24,L_SET);
1420
/* read the new flags */
1421
if (read (LOCAL->fd,LOCAL->buf,14) < 0) {
1422
sprintf (LOCAL->buf,"Unable to read old status: %s",strerror (errno));
1425
if ((LOCAL->buf[0] != ';') || (LOCAL->buf[13] != '-')) {
1426
LOCAL->buf[14] = '\0'; /* tie off buffer for error message */
1427
sprintf (LOCAL->buf+50,"Invalid flags for message %lu (%lu %lu): %s",
1428
elt->msgno,elt->private.special.offset,
1429
elt->private.special.text.size,(char *) LOCAL->buf);
1430
fatal (LOCAL->buf+50);
1432
/* print new flag string */
1433
sprintf (LOCAL->buf,"%08lx%04x-%08lx",elt->user_flags,(unsigned)
1434
(((elt->deleted && flags) ?
1435
fEXPUNGED : (strtoul (LOCAL->buf+9,NIL,16)) & fEXPUNGED) +
1436
(fSEEN * elt->seen) + (fDELETED * elt->deleted) +
1437
(fFLAGGED * elt->flagged) + (fANSWERED * elt->answered) +
1438
(fDRAFT * elt->draft) + fOLD),elt->private.uid);
1439
while (T) { /* get to that place in the file */
1440
lseek (LOCAL->fd,(off_t) elt->private.special.offset +
1441
elt->private.special.text.size - 23,L_SET);
1442
/* write new flags and UID */
1443
if (write (LOCAL->fd,LOCAL->buf,21) > 0) break;
1444
mm_notify (stream,strerror (errno),WARN);
1445
mm_diskerror (stream,errno,T);
1450
/* MBX locate header for a message
1451
* Accepts: MAIL stream
1453
* pointer to returned header size
1454
* pointer to possible returned header
1455
* Returns: position of header in file
1458
#define HDRBUFLEN 16384 /* good enough for most headers */
1459
#define SLOP 4 /* CR LF CR LF */
1461
unsigned long mbx_hdrpos (MAILSTREAM *stream,unsigned long msgno,
1462
unsigned long *size,char **hdr)
1464
unsigned long siz,done;
1466
unsigned char *s,*t,*te;
1467
MESSAGECACHE *elt = mail_elt (stream,msgno);
1468
unsigned long ret = elt->private.special.offset +
1469
elt->private.special.text.size;
1470
if (hdr) *hdr = NIL; /* assume no header returned */
1471
/* is header size known? */
1472
if (*size = elt->private.msg.header.text.size) return ret;
1473
/* paranoia check */
1474
if (LOCAL->buflen < (HDRBUFLEN + SLOP))
1475
fatal ("LOCAL->buf smaller than HDRBUFLEN");
1476
lseek (LOCAL->fd,ret,L_SET); /* get to header position */
1477
/* read HDRBUFLEN chunks with 4 byte slop */
1478
for (done = siz = 0, s = LOCAL->buf;
1479
(i = min ((long) (elt->rfc822_size - done),(long) HDRBUFLEN)) &&
1480
(read (LOCAL->fd,s,i) == i);
1481
done += i, siz += (t - LOCAL->buf) - SLOP, s = LOCAL->buf + SLOP) {
1482
te = (t = s + i) - 12; /* calculate end of fast scan */
1483
/* fast scan for CR */
1484
for (s = LOCAL->buf; s < te;)
1485
if (((*s++ == '\015') || (*s++ == '\015') || (*s++ == '\015') ||
1486
(*s++ == '\015') || (*s++ == '\015') || (*s++ == '\015') ||
1487
(*s++ == '\015') || (*s++ == '\015') || (*s++ == '\015') ||
1488
(*s++ == '\015') || (*s++ == '\015') || (*s++ == '\015')) &&
1489
(*s == '\012') && (*++s == '\015') && (*++s == '\012')) {
1490
*size = elt->private.msg.header.text.size = siz + (++s - LOCAL->buf);
1491
if (hdr) *hdr = LOCAL->buf;
1494
for (te = t - 3; (s < te);) /* final character-at-a-time scan */
1495
if ((*s++ == '\015') && (*s == '\012') && (*++s == '\015') &&
1497
*size = elt->private.msg.header.text.size = siz + (++s - LOCAL->buf);
1498
if (hdr) *hdr = LOCAL->buf;
1501
if (i <= SLOP) break; /* end of data */
1502
/* slide over last 4 bytes */
1503
memmove (LOCAL->buf,t - SLOP,SLOP);
1504
hdr = NIL; /* can't return header this way */
1506
/* not found: header consumes entire message */
1507
elt->private.msg.header.text.size = *size = elt->rfc822_size;
1508
if (hdr) *hdr = LOCAL->buf; /* possibly return header too */
1512
/* MBX mail rewrite mailbox
1513
* Accepts: MAIL stream
1514
* pointer to return reclaimed size
1515
* flags (0 = no expunge, 1 = expunge deleted, -1 = expunge sequence)
1516
* Returns: number of expunged messages
1519
unsigned long mbx_rewrite (MAILSTREAM *stream,unsigned long *reclaimed,
1522
struct utimbuf times;
1526
unsigned long i,j,k,m,delta;
1527
unsigned long n = *reclaimed = 0;
1528
unsigned long recent = 0;
1529
char lock[MAILTMPLEN];
1531
/* get parse/append permission */
1532
if ((ld = lockname (lock,stream->mailbox,LOCK_EX)) < 0) {
1533
mm_log ("Unable to lock expunge mailbox",ERROR);
1536
fstat (LOCAL->fd,&sbuf); /* get current write time */
1537
if (LOCAL->filetime && !LOCAL->flagcheck &&
1538
(LOCAL->filetime < sbuf.st_mtime)) LOCAL->flagcheck = T;
1539
if (!mbx_parse (stream)) { /* make sure see any newly-arrived messages */
1540
unlockfd (ld,lock); /* failed?? */
1543
if (LOCAL->flagcheck) { /* sweep flags if need flagcheck */
1544
LOCAL->filetime = sbuf.st_mtime;
1545
for (i = 1; i <= stream->nmsgs; ++i) mbx_elt (stream,i,NIL);
1546
LOCAL->flagcheck = NIL;
1549
/* get exclusive access */
1550
if (!flock (LOCAL->fd,LOCK_EX|LOCK_NB)) {
1551
mm_critical (stream); /* go critical */
1552
for (i = 1,delta = 0,pos = ppos = HDRSIZE; i <= stream->nmsgs; ) {
1553
/* note if message not at predicted location */
1554
if (m = (elt = mbx_elt (stream,i,NIL))->private.special.offset - ppos) {
1555
ppos = elt->private.special.offset;
1556
*reclaimed += m; /* note reclaimed message space */
1557
delta += m; /* and as expunge delta */
1559
/* number of bytes to smash or preserve */
1560
ppos += (k = elt->private.special.text.size + elt->rfc822_size);
1561
/* if need to expunge this message*/
1562
if (flags && elt->deleted && ((flags > 0) || elt->sequence)) {
1563
delta += k; /* number of bytes to delete */
1564
mail_expunged(stream,i);/* notify upper levels */
1565
n++; /* count up one more expunged message */
1567
else { /* preserved message */
1568
i++; /* count this message */
1569
if (elt->recent) ++recent;
1570
if (delta) { /* moved, note first byte to preserve */
1571
j = elt->private.special.offset;
1572
do { /* read from source position */
1573
m = min (k,LOCAL->buflen);
1574
lseek (LOCAL->fd,j,L_SET);
1575
read (LOCAL->fd,LOCAL->buf,m);
1576
pos = j - delta; /* write to destination position */
1578
lseek (LOCAL->fd,pos,L_SET);
1579
if (write (LOCAL->fd,LOCAL->buf,m) > 0) break;
1580
mm_notify (stream,strerror (errno),WARN);
1581
mm_diskerror (stream,errno,T);
1583
pos += m; /* new position */
1584
j += m; /* next chunk, perhaps */
1585
} while (k -= m); /* until done */
1586
/* note the new address of this text */
1587
elt->private.special.offset -= delta;
1589
/* preserved but no deleted messages yet */
1590
else pos = elt->private.special.offset + k;
1593
/* deltaed file size match position? */
1594
if (m = (LOCAL->filesize -= delta) - pos) {
1595
*reclaimed += m; /* probably an fEXPUNGED msg */
1596
LOCAL->filesize = pos; /* set correct size */
1598
/* truncate file after last message */
1599
ftruncate (LOCAL->fd,LOCAL->filesize);
1600
fsync (LOCAL->fd); /* force disk update */
1601
mm_nocritical (stream); /* release critical */
1602
flock (LOCAL->fd,LOCK_SH); /* allow sharers again */
1603
unlockfd (ld,lock); /* release exclusive parse/append permission */
1606
else { /* can't get exclusive */
1607
flock (LOCAL->fd,LOCK_SH); /* recover previous shared mailbox lock */
1608
unlockfd (ld,lock); /* release exclusive parse/append permission */
1609
/* do hide-expunge when shared */
1610
if (flags) for (i = 1; i <= stream->nmsgs; ) {
1611
if (elt = mbx_elt (stream,i,T)) {
1612
/* make the message invisible */
1613
if (elt->deleted && ((flags > 0) || elt->sequence)) {
1614
mbx_update_status (stream,elt->msgno,LONGT);
1615
/* notify upper levels */
1616
mail_expunged (stream,i);
1617
n++; /* count up one more expunged message */
1620
i++; /* preserved message */
1621
if (elt->recent) ++recent;
1624
else n++; /* count up one more expunged message */
1626
fsync (LOCAL->fd); /* force disk update */
1628
fstat (LOCAL->fd,&sbuf); /* get new write time */
1629
times.modtime = LOCAL->filetime = sbuf.st_mtime;
1630
times.actime = time (0); /* reset atime to now */
1631
utime (stream->mailbox,×);
1632
/* notify upper level of new mailbox size */
1633
mail_exists (stream,stream->nmsgs);
1634
mail_recent (stream,recent);
1635
return n; /* return number of expunged messages */
1638
/* MBX mail lock for flag updating
1640
* Returns: T if successful, NIL if failure
1643
long mbx_flaglock (MAILSTREAM *stream)
1648
char lock[MAILTMPLEN];
1649
/* no-op if readonly or already locked */
1650
if (!stream->rdonly && LOCAL && (LOCAL->fd >= 0) && (LOCAL->ld < 0)) {
1652
if ((ld = lockname (lock,stream->mailbox,LOCK_EX)) < 0) return NIL;
1653
if (!LOCAL->flagcheck) { /* don't do this if flagcheck already needed */
1654
if (LOCAL->filetime) { /* know previous time? */
1655
fstat (LOCAL->fd,&sbuf);/* get current write time */
1656
if (LOCAL->filetime < sbuf.st_mtime) LOCAL->flagcheck = T;
1657
LOCAL->filetime = 0; /* don't do this test for any other messages */
1659
if (!mbx_parse (stream)) {/* parse mailbox */
1660
unlockfd (ld,lock); /* shouldn't happen */
1663
if (LOCAL->flagcheck) /* invalidate cache if flagcheck */
1664
for (i = 1; i <= stream->nmsgs; ++i) mail_elt (stream,i)->valid = NIL;
1666
LOCAL->ld = ld; /* copy to stream for subseuent calls */
1667
memcpy (LOCAL->lock,lock,MAILTMPLEN);
added
removed
imap/src/osdep/nt/mbxnt.c
