1856 lines
62 KiB
C
1856 lines
62 KiB
C
/* ========================================================================
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* Copyright 1988-2007 University of Washington
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*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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*
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* ========================================================================
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*/
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/*
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* Program: MBX mail routines
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*
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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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* Seattle, WA 98195
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* Internet: MRC@CAC.Washington.EDU
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*
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* Date: 3 October 1995
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* Last Edited: 11 October 2007
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*/
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/* FILE TIME SEMANTICS
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*
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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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*/
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#include <stdio.h>
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#include <ctype.h>
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#include <errno.h>
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extern int errno; /* just in case */
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#include "mail.h"
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#include "osdep.h"
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#include <pwd.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include "misc.h"
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#include "dummy.h"
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#include "fdstring.h"
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/* Build parameters */
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#define HDRSIZE 2048
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/* Kludge to make Cygwin happy */
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#ifndef O_BINARY
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#define O_BINARY 0
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#endif
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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 long lastpid; /* PID of last writer */
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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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} MBXLOCAL;
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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 *tmp,int *ld,char *lock,
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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 flags);
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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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char *mbx_file (char *dst,char *name);
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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 flags);
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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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DRIVER mbxdriver = {
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"mbx", /* driver name */
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DR_LOCAL|DR_MAIL|DR_CRLF|DR_LOCKING,
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/* driver flags */
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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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mbx_status, /* 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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};
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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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*/
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DRIVER *mbx_valid (char *name)
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{
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char tmp[MAILTMPLEN];
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int fd = mbx_isvalid (NIL,name,tmp,NIL,NIL,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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return &mbxdriver;
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}
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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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* mailbox name
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* scratch buffer
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* returned lock fd
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* returned lock 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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*/
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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 *tmp,int *ld,char *lock,
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long flags)
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{
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int fd,upd;
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int ret = -1;
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unsigned long i;
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long j,k;
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off_t pos;
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char c,*s,*t,hdr[HDRSIZE];
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struct stat sbuf;
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time_t tp[2];
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int error = EINVAL; /* assume invalid argument */
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if (ld) *ld = -1; /* initially no lock */
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if ((s = mbx_file (tmp,name)) && !stat (s,&sbuf) &&
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((fd = open (tmp,(flags ? O_RDWR : O_RDONLY)|O_BINARY,NIL)) >= 0)) {
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error = -1; /* bogus format */
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/* I love cretinous C compilers -- don't you? */
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if (read (fd,hdr,HDRSIZE) == HDRSIZE)
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if ((hdr[0] == '*') && (hdr[1] == 'm') && (hdr[2] == 'b') &&
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(hdr[3] == 'x') && (hdr[4] == '*') && (hdr[5] == '\015') &&
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(hdr[6] == '\012') && isxdigit (hdr[7]) && isxdigit (hdr[8]))
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if (isxdigit (hdr[9]) && isxdigit (hdr[10]) && isxdigit (hdr[11]) &&
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isxdigit (hdr[12]) && isxdigit (hdr[13]) && isxdigit (hdr[14]) &&
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isxdigit (c = hdr[15]) && isxdigit (hdr[16]))
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if (isxdigit (hdr[17]) && isxdigit (hdr[18]) &&
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isxdigit (hdr[19]) && isxdigit (hdr[20]) &&
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isxdigit (hdr[21]) && isxdigit (hdr[22]) &&
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(hdr[23] == '\015') && (hdr[24] == '\012')) {
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ret = fd; /* mbx format */
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if (stream) { /* lock if making mini-stream */
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if (flock (fd,LOCK_SH) ||
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(flags && ((*ld = lockfd (fd,lock,LOCK_EX)) < 0))) ret = -1;
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/* reread data now that locked */
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else if (lseek (fd,0,L_SET) ||
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(read (fd,hdr,HDRSIZE) != HDRSIZE)) ret = -1;
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else {
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*stream = (MAILSTREAM *) memset (fs_get (sizeof (MAILSTREAM)),
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0,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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i++, s = t + 2) {
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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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}
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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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pos += (j + k)) {
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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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hdr[j] = '\0';
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if ((s = strchr (hdr,'\015')) && (s[1] == '\012')) {
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*s = '\0';
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k = s + 2 - hdr;
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if ((s = strchr (hdr,',')) &&
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(j = strtol (s+1,&s,10)) && (*s == ';') &&
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(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)) &&
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(i <= (*stream)->uid_last)) {
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if (!i) {
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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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write (fd,hdr,8);
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upd = T;
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}
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continue;
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}
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}
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}
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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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j = k = 0;
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}
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}
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if (upd) { /* need to update hdr with new UIDLAST? */
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lseek (fd,15,L_SET);
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sprintf (hdr,"%08lx",(*stream)->uid_last);
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write (fd,hdr,8);
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}
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}
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}
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}
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}
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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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tp[0] = sbuf.st_atime; /* preserve atime and mtime */
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tp[1] = sbuf.st_mtime;
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set_utime_from_tp (tmp,tp); /* set the times */
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}
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}
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/* in case INBOX but not mbx format */
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else if (((error = errno) == ENOENT) && !compare_cstring (name,"INBOX"))
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error = -1;
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if ((ret < 0) && ld && (*ld >= 0)) {
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unlockfd (*ld,lock);
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*ld = -1;
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}
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errno = error; /* return as last error */
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return ret; /* return what we should */
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}
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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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*/
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void *mbx_parameters (long function,void *value)
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{
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void *ret = NIL;
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switch ((int) function) {
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case GET_INBOXPATH:
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if (value) ret = mbx_file ((char *) value,"INBOX");
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break;
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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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break;
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}
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return ret;
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}
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/* MBX mail scan mailboxes
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* Accepts: mail stream
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* reference
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* pattern to search
|
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* string to scan
|
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*/
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void mbx_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents)
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{
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if (stream) dummy_scan (NIL,ref,pat,contents);
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}
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/* MBX mail list mailboxes
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* Accepts: mail stream
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* reference
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* pattern to search
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*/
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void mbx_list (MAILSTREAM *stream,char *ref,char *pat)
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{
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if (stream) dummy_list (NIL,ref,pat);
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}
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/* MBX mail list subscribed mailboxes
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* Accepts: mail stream
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* reference
|
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* pattern to search
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*/
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void mbx_lsub (MAILSTREAM *stream,char *ref,char *pat)
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{
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if (stream) dummy_lsub (NIL,ref,pat);
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}
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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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*/
|
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long mbx_create (MAILSTREAM *stream,char *mailbox)
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{
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char *s,*t,mbx[MAILTMPLEN],tmp[HDRSIZE];
|
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long ret = NIL;
|
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int i,fd;
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if (!(s = mbx_file (mbx,mailbox))) {
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sprintf (mbx,"Can't create %.80s: invalid name",mailbox);
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MM_LOG (mbx,ERROR);
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}
|
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/* create underlying file */
|
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else if (dummy_create_path (stream,s,get_dir_protection (mailbox))) {
|
||
/* done if made directory */
|
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if ((s = strrchr (s,'/')) && !s[1]) return T;
|
||
if ((fd = open (mbx,O_WRONLY|O_BINARY,NIL)) < 0) {
|
||
sprintf (tmp,"Can't reopen mailbox node %.80s: %s",mbx,strerror (errno));
|
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MM_LOG (tmp,ERROR);
|
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unlink (mbx); /* delete the file */
|
||
}
|
||
else {
|
||
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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t = (stream && stream->user_flags[i]) ? stream->user_flags[i] :
|
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((t = default_user_flag (i)) ? t : "");
|
||
sprintf (s += strlen (s),"%s\015\012",t);
|
||
}
|
||
if (write (fd,tmp,HDRSIZE) != HDRSIZE) {
|
||
sprintf (tmp,"Can't initialize mailbox node %.80s: %s",
|
||
mbx,strerror (errno));
|
||
MM_LOG (tmp,ERROR);
|
||
unlink (mbx); /* delete the file */
|
||
}
|
||
else ret = T; /* success */
|
||
close (fd); /* close file */
|
||
}
|
||
}
|
||
/* set proper protections */
|
||
return ret ? set_mbx_protections (mailbox,mbx) : NIL;
|
||
}
|
||
|
||
|
||
/* MBX mail delete mailbox
|
||
* Accepts: MAIL stream
|
||
* mailbox name to delete
|
||
* Returns: T on success, NIL on failure
|
||
*/
|
||
|
||
long mbx_delete (MAILSTREAM *stream,char *mailbox)
|
||
{
|
||
return mbx_rename (stream,mailbox,NIL);
|
||
}
|
||
|
||
/* MBX mail rename mailbox
|
||
* Accepts: MAIL stream
|
||
* old mailbox name
|
||
* new mailbox name (or NIL for delete)
|
||
* Returns: T on success, NIL on failure
|
||
*/
|
||
|
||
long mbx_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 (!mbx_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;
|
||
}
|
||
else if ((fd = open (file,O_RDWR|O_BINARY,NIL)) < 0) {
|
||
sprintf (tmp,"Can't open mailbox %.80s: %s",old,strerror (errno));
|
||
MM_LOG (tmp,ERROR);
|
||
return NIL;
|
||
}
|
||
/* get parse/append permission */
|
||
if ((ld = lockfd (fd,lock,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;
|
||
}
|
||
|
||
if (newname) { /* want rename? */
|
||
/* found superior to destination name? */
|
||
if (s = strrchr (tmp,'/')) {
|
||
c = *++s; /* remember first character of inferior */
|
||
*s = '\0'; /* tie off to get just superior */
|
||
/* superior name doesn't exist, create it */
|
||
if ((stat (tmp,&sbuf) || ((sbuf.st_mode & S_IFMT) != S_IFDIR)) &&
|
||
!dummy_create_path (stream,tmp,get_dir_protection (newname)))
|
||
ret = NIL;
|
||
else *s = c; /* restore full name */
|
||
}
|
||
/* 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 if (unlink (file)) {
|
||
sprintf (tmp,"Can't delete mailbox %.80s: %s",old,strerror (errno));
|
||
MM_LOG (tmp,ERROR);
|
||
ret = NIL; /* set failure */
|
||
}
|
||
flock (fd,LOCK_UN); /* release lock on the file */
|
||
unlockfd (ld,lock); /* release exclusive parse/append permission */
|
||
close (fd); /* close the file */
|
||
/* recreate file if renamed INBOX */
|
||
if (ret && !compare_cstring (old,"INBOX")) mbx_create (NIL,"INBOX");
|
||
return ret; /* return success */
|
||
}
|
||
|
||
/* MBX Mail status
|
||
* Accepts: mail stream
|
||
* mailbox name
|
||
* status flags
|
||
* Returns: T on success, NIL on failure
|
||
*/
|
||
|
||
long mbx_status (MAILSTREAM *stream,char *mbx,long flags)
|
||
{
|
||
MAILSTATUS status;
|
||
unsigned long i;
|
||
MAILSTREAM *tstream = NIL;
|
||
MAILSTREAM *systream = NIL;
|
||
/* make temporary stream (unless this mbx) */
|
||
if (!stream && !(stream = tstream =
|
||
mail_open (NIL,mbx,OP_READONLY|OP_SILENT)))
|
||
return NIL;
|
||
status.flags = flags; /* return status values */
|
||
status.messages = stream->nmsgs;
|
||
status.recent = stream->recent;
|
||
if (flags & SA_UNSEEN) /* must search to get unseen messages */
|
||
for (i = 1,status.unseen = 0; i <= stream->nmsgs; i++)
|
||
if (!mail_elt (stream,i)->seen) status.unseen++;
|
||
status.uidnext = stream->uid_last + 1;
|
||
status.uidvalidity = stream->uid_validity;
|
||
/* calculate post-snarf results */
|
||
if (!status.recent && stream->inbox &&
|
||
(systream = mail_open (NIL,sysinbox (),OP_READONLY|OP_SILENT))) {
|
||
status.messages += systream->nmsgs;
|
||
status.recent += systream->recent;
|
||
if (flags & SA_UNSEEN) /* must search to get unseen messages */
|
||
for (i = 1; i <= systream->nmsgs; i++)
|
||
if (!mail_elt (systream,i)->seen) status.unseen++;
|
||
/* kludge but probably good enough */
|
||
status.uidnext += systream->nmsgs;
|
||
}
|
||
MM_STATUS(stream,mbx,&status);/* pass status to main program */
|
||
if (tstream) mail_close (tstream);
|
||
if (systream) mail_close (systream);
|
||
return T; /* success */
|
||
}
|
||
|
||
/* MBX mail open
|
||
* Accepts: stream to open
|
||
* Returns: stream on success, NIL on failure
|
||
*/
|
||
|
||
MAILSTREAM *mbx_open (MAILSTREAM *stream)
|
||
{
|
||
int fd,ld;
|
||
short silent;
|
||
char tmp[MAILTMPLEN];
|
||
blocknotify_t bn = (blocknotify_t) mail_parameters (NIL,GET_BLOCKNOTIFY,NIL);
|
||
/* return prototype for OP_PROTOTYPE call */
|
||
if (!stream) return user_flags (&mbxproto);
|
||
if (stream->local) fatal ("mbx recycle stream");
|
||
/* canonicalize the mailbox name */
|
||
if (!mbx_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_RDWR|O_BINARY,NIL)) < 0) {
|
||
if ((fd = open (tmp,O_RDONLY|O_BINARY,NIL)) < 0) {
|
||
sprintf (tmp,"Can't open mailbox: %s",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 = memset (fs_get (sizeof (MBXLOCAL)),NIL,sizeof (MBXLOCAL));
|
||
LOCAL->fd = fd; /* bind the file */
|
||
LOCAL->ld = -1; /* no flaglock */
|
||
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 parse/append permission */
|
||
if ((ld = lockfd (LOCAL->fd,tmp,LOCK_EX)) < 0) {
|
||
MM_LOG ("Unable to lock open mailbox",ERROR);
|
||
return NIL;
|
||
}
|
||
(*bn) (BLOCK_FILELOCK,NIL);
|
||
flock (LOCAL->fd,LOCK_SH); /* lock the file */
|
||
(*bn) (BLOCK_NONE,NIL);
|
||
unlockfd (ld,tmp); /* release shared parse permission */
|
||
LOCAL->filesize = HDRSIZE; /* initialize parsed file size */
|
||
/* time not set up yet */
|
||
LOCAL->lastsnarf = LOCAL->filetime = 0;
|
||
LOCAL->expok = LOCAL->flagcheck = NIL;
|
||
stream->sequence++; /* bump sequence number */
|
||
/* parse mailbox */
|
||
stream->nmsgs = stream->recent = 0;
|
||
silent = stream->silent; /* defer events */
|
||
stream->silent = T;
|
||
if (mbx_ping (stream) && !stream->nmsgs)
|
||
MM_LOG ("Mailbox is empty",(long) NIL);
|
||
stream->silent = silent; /* now notify upper level */
|
||
mail_exists (stream,stream->nmsgs);
|
||
mail_recent (stream,stream->recent);
|
||
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;
|
||
stream->kwd_create = (stream->user_flags[NUSERFLAGS-1] || stream->rdonly) ?
|
||
NIL : T; /* can we create new user flags? */
|
||
return stream; /* return stream to caller */
|
||
}
|
||
|
||
/* MBX mail close
|
||
* Accepts: MAIL stream
|
||
* close options
|
||
*/
|
||
|
||
void mbx_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 */
|
||
/* do an expunge if requested */
|
||
if (options & CL_EXPUNGE) mbx_expunge (stream,NIL,NIL);
|
||
else { /* otherwise do a checkpoint to purge */
|
||
LOCAL->expok = T; /* possible expunged messages */
|
||
mbx_ping (stream);
|
||
}
|
||
stream->silent = silent; /* restore previous status */
|
||
mbx_abort (stream);
|
||
}
|
||
}
|
||
|
||
|
||
/* MBX mail abort stream
|
||
* Accepts: MAIL stream
|
||
*/
|
||
|
||
void mbx_abort (MAILSTREAM *stream)
|
||
{
|
||
if (stream && LOCAL) { /* only if a file is open */
|
||
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 */
|
||
}
|
||
}
|
||
|
||
|
||
/* MBX mail fetch flags
|
||
* Accepts: MAIL stream
|
||
* sequence
|
||
* option flags
|
||
* Sniffs at file to see if some other process changed the flags
|
||
*/
|
||
|
||
void mbx_flags (MAILSTREAM *stream,char *sequence,long flags)
|
||
{
|
||
MESSAGECACHE *elt;
|
||
unsigned long i;
|
||
if (mbx_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 ((elt = mail_elt (stream,i))->sequence && !elt->valid)
|
||
mbx_elt (stream,i,NIL);
|
||
}
|
||
|
||
/* MBX 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 *mbx_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *length,
|
||
long flags)
|
||
{
|
||
unsigned long i;
|
||
char *s;
|
||
*length = 0; /* default to empty */
|
||
if (flags & FT_UID) return "";/* UID call "impossible" */
|
||
/* get header position, possibly header */
|
||
i = mbx_hdrpos (stream,msgno,length,&s);
|
||
if (!s) { /* mbx_hdrpos() returned header? */
|
||
lseek (LOCAL->fd,i,L_SET); /* no, get to header position */
|
||
/* is buffer big enough? */
|
||
if (*length > LOCAL->buflen) {
|
||
fs_give ((void **) &LOCAL->buf);
|
||
LOCAL->buf = (char *) fs_get ((LOCAL->buflen = *length) + 1);
|
||
}
|
||
/* slurp the data */
|
||
read (LOCAL->fd,s = LOCAL->buf,*length);
|
||
}
|
||
s[*length] = '\0'; /* tie off string */
|
||
return s;
|
||
}
|
||
|
||
/* MBX mail fetch message text (body only)
|
||
* Accepts: MAIL stream
|
||
* message # to fetch
|
||
* pointer to returned header text length
|
||
* option flags
|
||
* Returns: T on success, NIL on failure
|
||
*/
|
||
|
||
long mbx_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;
|
||
/* get message status */
|
||
elt = mbx_elt (stream,msgno,NIL);
|
||
/* if message not seen */
|
||
if (!(flags & FT_PEEK) && !elt->seen && mbx_flaglock (stream)) {
|
||
elt->seen = T; /* mark message as seen */
|
||
/* recalculate status */
|
||
mbx_update_status (stream,msgno,NIL);
|
||
MM_FLAGS (stream,msgno);
|
||
/* update flags */
|
||
mbx_flag (stream,NIL,NIL,NIL);
|
||
}
|
||
if (!LOCAL) return NIL; /* mbx_flaglock() could have aborted */
|
||
/* find header position */
|
||
i = mbx_hdrpos (stream,msgno,&j,NIL);
|
||
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 LONGT; /* success */
|
||
}
|
||
|
||
/* MBX mail modify flags
|
||
* Accepts: MAIL stream
|
||
* sequence
|
||
* flag(s)
|
||
* option flags
|
||
* Unlocks flag lock
|
||
*/
|
||
|
||
void mbx_flag (MAILSTREAM *stream,char *sequence,char *flag,long flags)
|
||
{
|
||
time_t tp[2];
|
||
struct stat sbuf;
|
||
unsigned long oldpid = LOCAL->lastpid;
|
||
/* make sure the update takes */
|
||
if (!stream->rdonly && LOCAL && (LOCAL->fd >= 0) && (LOCAL->ld >= 0)) {
|
||
fsync (LOCAL->fd);
|
||
fstat (LOCAL->fd,&sbuf); /* get current write time */
|
||
tp[1] = LOCAL->filetime = sbuf.st_mtime;
|
||
/* we are the last flag updater */
|
||
LOCAL->lastpid = (unsigned long) getpid ();
|
||
/* update header if needed */
|
||
if (((LOCAL->ffuserflag < NUSERFLAGS) &&
|
||
stream->user_flags[LOCAL->ffuserflag]) || (oldpid != LOCAL->lastpid))
|
||
mbx_update_header (stream);
|
||
tp[0] = time (0); /* make sure read comes after all that */
|
||
set_utime_from_tp(stream->mailbox,tp);
|
||
}
|
||
if (LOCAL->ld >= 0) { /* unlock now */
|
||
unlockfd (LOCAL->ld,LOCAL->lock);
|
||
LOCAL->ld = -1;
|
||
}
|
||
}
|
||
|
||
|
||
/* MBX mail per-message modify flags
|
||
* Accepts: MAIL stream
|
||
* message cache element
|
||
*/
|
||
|
||
void mbx_flagmsg (MAILSTREAM *stream,MESSAGECACHE *elt)
|
||
{
|
||
if (mbx_flaglock (stream)) mbx_update_status (stream,elt->msgno,NIL);
|
||
}
|
||
|
||
/* MBX mail ping mailbox
|
||
* Accepts: MAIL stream
|
||
* Returns: T if stream still alive, NIL if not
|
||
*/
|
||
|
||
long mbx_ping (MAILSTREAM *stream)
|
||
{
|
||
unsigned long i,pos;
|
||
long ret = NIL;
|
||
int ld;
|
||
char lock[MAILTMPLEN];
|
||
MESSAGECACHE *elt;
|
||
struct stat sbuf;
|
||
if (stream && LOCAL) { /* only if stream already open */
|
||
int snarf = stream->inbox && !stream->rdonly;
|
||
ret = LONGT; /* assume OK */
|
||
fstat (LOCAL->fd,&sbuf); /* get current file poop */
|
||
/* allow expunge if permitted at ping */
|
||
if (mail_parameters (NIL,GET_EXPUNGEATPING,NIL)) LOCAL->expok = T;
|
||
/* if external modification */
|
||
if (LOCAL->filetime && (LOCAL->filetime < sbuf.st_mtime))
|
||
LOCAL->flagcheck = T; /* upgrade to flag checking */
|
||
/* new mail or flagcheck handling needed? */
|
||
if (((sbuf.st_size - LOCAL->filesize) || LOCAL->flagcheck ||
|
||
!stream->nmsgs || snarf) &&
|
||
((ld = lockfd (LOCAL->fd,lock,LOCK_EX)) >= 0)) {
|
||
/* reparse header if not flagchecking */
|
||
if (!LOCAL->flagcheck) ret = mbx_parse (stream);
|
||
/* sweep mailbox for changed message status */
|
||
else if (ret = mbx_parse (stream)) {
|
||
unsigned long recent = 0;
|
||
LOCAL->filetime = sbuf.st_mtime;
|
||
for (i = 1; i <= stream->nmsgs; )
|
||
if (elt = mbx_elt (stream,i,LOCAL->expok)) {
|
||
if (elt->recent) ++recent;
|
||
++i;
|
||
}
|
||
mail_recent (stream,recent);
|
||
LOCAL->flagcheck = NIL; /* got all the updates */
|
||
}
|
||
/* always reparse header at least */
|
||
if (ret && snarf) { /* snarf new messages if still OK */
|
||
mbx_snarf (stream);
|
||
/* parse snarfed messages */
|
||
ret = mbx_parse (stream);
|
||
}
|
||
unlockfd (ld,lock); /* release shared parse/append permission */
|
||
}
|
||
if (ret) { /* must still be alive */
|
||
if (!LOCAL->expunged) /* look for holes if none known yet */
|
||
for (i = 1, pos = HDRSIZE;
|
||
!LOCAL->expunged && (i <= stream->nmsgs);
|
||
i++, pos += elt->private.special.text.size + elt->rfc822_size)
|
||
if ((elt = mail_elt (stream,i))->private.special.offset != pos)
|
||
LOCAL->expunged = T;/* found a hole */
|
||
/* burp any holes */
|
||
if (LOCAL->expunged && !stream->rdonly) {
|
||
if (mbx_rewrite (stream,&i,NIL)) fatal ("expunge on check");
|
||
if (i) { /* any space reclaimed? */
|
||
LOCAL->expunged = NIL;/* no more pending expunge */
|
||
sprintf (LOCAL->buf,"Reclaimed %lu bytes of expunged space",i);
|
||
MM_LOG (LOCAL->buf,(long) NIL);
|
||
}
|
||
}
|
||
LOCAL->expok = NIL; /* no more expok */
|
||
}
|
||
}
|
||
return ret; /* return result of the parse */
|
||
}
|
||
|
||
/* MBX mail check mailbox (reparses status too)
|
||
* Accepts: MAIL stream
|
||
*/
|
||
|
||
void mbx_check (MAILSTREAM *stream)
|
||
{
|
||
if (LOCAL) LOCAL->expok = T; /* mark that a check is desired */
|
||
if (mbx_ping (stream)) MM_LOG ("Check completed",(long) NIL);
|
||
}
|
||
|
||
|
||
/* MBX mail expunge mailbox
|
||
* Accepts: MAIL stream
|
||
* sequence to expunge if non-NIL
|
||
* expunge options
|
||
* Returns: T if success, NIL if failure
|
||
*/
|
||
|
||
long mbx_expunge (MAILSTREAM *stream,char *sequence,long options)
|
||
{
|
||
long ret;
|
||
unsigned long nexp,reclaimed;
|
||
if (ret = sequence ? ((options & EX_UID) ?
|
||
mail_uid_sequence (stream,sequence) :
|
||
mail_sequence (stream,sequence)) : LONGT) {
|
||
if (!mbx_ping (stream)); /* do nothing if stream dead */
|
||
else if (stream->rdonly) /* won't do on readonly files! */
|
||
MM_LOG ("Expunge ignored on readonly mailbox",WARN);
|
||
/* if expunged any messages */
|
||
else if (nexp = mbx_rewrite (stream,&reclaimed,sequence ? -1 : 1)) {
|
||
sprintf (LOCAL->buf,"Expunged %lu messages",nexp);
|
||
MM_LOG (LOCAL->buf,(long) NIL);
|
||
}
|
||
else if (reclaimed) { /* or if any prior expunged space reclaimed */
|
||
sprintf (LOCAL->buf,"Reclaimed %lu bytes of expunged space",reclaimed);
|
||
MM_LOG (LOCAL->buf,(long) NIL);
|
||
}
|
||
else MM_LOG ("No messages deleted, so no update needed",(long) NIL);
|
||
}
|
||
return ret;
|
||
}
|
||
|
||
/* MBX mail snarf messages from system inbox
|
||
* Accepts: MAIL stream, already locked
|
||
*/
|
||
|
||
void mbx_snarf (MAILSTREAM *stream)
|
||
{
|
||
unsigned long i = 0;
|
||
unsigned long j,r,hdrlen,txtlen;
|
||
struct stat sbuf;
|
||
char *hdr,*txt,tmp[MAILTMPLEN];
|
||
MESSAGECACHE *elt;
|
||
MAILSTREAM *sysibx = NIL;
|
||
/* give up if can't get exclusive permission */
|
||
if ((time (0) >= (LOCAL->lastsnarf +
|
||
(long) mail_parameters (NIL,GET_SNARFINTERVAL,NIL))) &&
|
||
strcmp (sysinbox (),stream->mailbox)) {
|
||
MM_CRITICAL (stream); /* go critical */
|
||
/* sizes match and anything in sysinbox? */
|
||
if (!stat (sysinbox (),&sbuf) && sbuf.st_size &&
|
||
!fstat (LOCAL->fd,&sbuf) && (sbuf.st_size == LOCAL->filesize) &&
|
||
(sysibx = mail_open (sysibx,sysinbox (),OP_SILENT)) &&
|
||
(!sysibx->rdonly) && (r = sysibx->nmsgs)) {
|
||
/* yes, go to end of file in our mailbox */
|
||
lseek (LOCAL->fd,sbuf.st_size,L_SET);
|
||
/* for each message in sysibx mailbox */
|
||
while (r && (++i <= sysibx->nmsgs)) {
|
||
/* snarf message from system INBOX */
|
||
hdr = cpystr (mail_fetchheader_full (sysibx,i,NIL,&hdrlen,NIL));
|
||
txt = mail_fetchtext_full (sysibx,i,&txtlen,FT_PEEK);
|
||
/* if have a message */
|
||
if (j = hdrlen + txtlen) {
|
||
/* build header line */
|
||
mail_date (LOCAL->buf,elt = mail_elt (sysibx,i));
|
||
sprintf (LOCAL->buf + strlen (LOCAL->buf),
|
||
",%lu;00000000%04x-00000000\015\012",j,(unsigned)
|
||
((fSEEN * elt->seen) +
|
||
(fDELETED * elt->deleted) + (fFLAGGED * elt->flagged) +
|
||
(fANSWERED * elt->answered) + (fDRAFT * elt->draft)));
|
||
/* copy message */
|
||
if ((write (LOCAL->fd,LOCAL->buf,strlen (LOCAL->buf)) < 0) ||
|
||
(write (LOCAL->fd,hdr,hdrlen) < 0) ||
|
||
(write (LOCAL->fd,txt,txtlen) < 0)) r = 0;
|
||
}
|
||
fs_give ((void **) &hdr);
|
||
}
|
||
|
||
/* make sure all the updates take */
|
||
if (fsync (LOCAL->fd)) r = 0;
|
||
if (r) { /* delete all the messages we copied */
|
||
if (r == 1) strcpy (tmp,"1");
|
||
else sprintf (tmp,"1:%lu",r);
|
||
mail_setflag (sysibx,tmp,"\\Deleted");
|
||
mail_expunge (sysibx); /* now expunge all those messages */
|
||
}
|
||
else {
|
||
sprintf (LOCAL->buf,"Can't copy new mail: %s",strerror (errno));
|
||
MM_LOG (LOCAL->buf,WARN);
|
||
ftruncate (LOCAL->fd,sbuf.st_size);
|
||
}
|
||
fstat (LOCAL->fd,&sbuf); /* yes, get current file size */
|
||
LOCAL->filetime = sbuf.st_mtime;
|
||
}
|
||
if (sysibx) mail_close (sysibx);
|
||
MM_NOCRITICAL (stream); /* release critical */
|
||
LOCAL->lastsnarf = time (0);/* note time of last snarf */
|
||
}
|
||
}
|
||
|
||
/* MBX mail copy message(s)
|
||
* Accepts: MAIL stream
|
||
* sequence
|
||
* destination mailbox
|
||
* copy options
|
||
* Returns: T if success, NIL if failed
|
||
*/
|
||
|
||
long mbx_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options)
|
||
{
|
||
struct stat sbuf;
|
||
time_t tp[2];
|
||
MESSAGECACHE *elt;
|
||
unsigned long i,j,k,m;
|
||
long ret = LONGT;
|
||
int fd,ld;
|
||
char *s,*t,file[MAILTMPLEN],lock[MAILTMPLEN];
|
||
mailproxycopy_t pc =
|
||
(mailproxycopy_t) mail_parameters (stream,GET_MAILPROXYCOPY,NIL);
|
||
copyuid_t cu = (copyuid_t) mail_parameters (NIL,GET_COPYUID,NIL);
|
||
SEARCHSET *source = cu ? mail_newsearchset () : NIL;
|
||
SEARCHSET *dest = cu ? mail_newsearchset () : NIL;
|
||
MAILSTREAM *dstream = NIL;
|
||
if (!((options & CP_UID) ? mail_uid_sequence (stream,sequence) :
|
||
mail_sequence (stream,sequence))) return NIL;
|
||
/* make sure valid mailbox */
|
||
if ((fd = mbx_isvalid (&dstream,mailbox,file,&ld,lock,
|
||
cu ? MBXISVALIDUID : MBXISVALIDNOUID)) < 0)
|
||
switch (errno) {
|
||
case ENOENT: /* no such file? */
|
||
MM_NOTIFY (stream,"[TRYCREATE] Must create mailbox before copy",NIL);
|
||
return NIL;
|
||
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 MBX-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 MBX-format mailbox: %.80s",mailbox);
|
||
MM_LOG (LOCAL->buf,ERROR);
|
||
return NIL;
|
||
}
|
||
MM_CRITICAL (stream); /* go critical */
|
||
fstat (fd,&sbuf); /* get current file size */
|
||
lseek (fd,sbuf.st_size,L_SET);/* move to end of file */
|
||
|
||
/* 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 +
|
||
elt->private.special.text.size,L_SET);
|
||
mail_date(LOCAL->buf,elt);/* build target header */
|
||
/* get target keyword mask */
|
||
for (j = elt->user_flags, k = 0; j; )
|
||
if (s = stream->user_flags[find_rightmost_bit (&j)])
|
||
for (m = 0; (m < NUSERFLAGS) && (t = dstream->user_flags[m]); m++)
|
||
if (!compare_cstring (s,t) && (k |= 1 << m)) break;
|
||
sprintf (LOCAL->buf+strlen(LOCAL->buf),",%lu;%08lx%04x-%08lx\015\012",
|
||
elt->rfc822_size,k,(unsigned)
|
||
((fSEEN * elt->seen) + (fDELETED * elt->deleted) +
|
||
(fFLAGGED * elt->flagged) + (fANSWERED * elt->answered) +
|
||
(fDRAFT * elt->draft)),cu ? ++dstream->uid_last : 0);
|
||
/* write target header */
|
||
if (ret = (write (fd,LOCAL->buf,strlen (LOCAL->buf)) > 0)) {
|
||
for (k = elt->rfc822_size; ret && (j = min (k,LOCAL->buflen)); k -= j){
|
||
read (LOCAL->fd,LOCAL->buf,j);
|
||
ret = write (fd,LOCAL->buf,j) >= 0;
|
||
}
|
||
if (cu) { /* need to pass back new UID? */
|
||
mail_append_set (source,mail_uid (stream,i));
|
||
mail_append_set (dest,dstream->uid_last);
|
||
}
|
||
}
|
||
}
|
||
|
||
/* 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);
|
||
}
|
||
if (cu && ret) { /* return sets if doing COPYUID */
|
||
(*cu) (stream,mailbox,dstream->uid_validity,source,dest);
|
||
lseek (fd,15,L_SET); /* update UIDLAST */
|
||
sprintf (LOCAL->buf,"%08lx",dstream->uid_last);
|
||
write (fd,LOCAL->buf,8);
|
||
}
|
||
else { /* flush any sets we may have built */
|
||
mail_free_searchset (&source);
|
||
mail_free_searchset (&dest);
|
||
}
|
||
if (ret) tp[0] = time (0) - 1;/* set atime to now-1 if successful copy */
|
||
/* else preserve \Marked status */
|
||
else tp[0] = (sbuf.st_ctime > sbuf.st_atime) ? sbuf.st_atime : time(0);
|
||
tp[1] = sbuf.st_mtime; /* preserve mtime */
|
||
set_utime_from_tp(file,tp); /* set the times */
|
||
close (fd); /* close the file */
|
||
MM_NOCRITICAL (stream); /* release critical */
|
||
unlockfd (ld,lock); /* release exclusive parse/append permission */
|
||
/* delete all requested messages */
|
||
if (ret && (options & CP_MOVE) && mbx_flaglock (stream)) {
|
||
for (i = 1; i <= stream->nmsgs; i++) if (mail_elt (stream,i)->sequence) {
|
||
/* mark message deleted */
|
||
mbx_elt (stream,i,NIL)->deleted = T;
|
||
/* recalculate status */
|
||
mbx_update_status (stream,i,NIL);
|
||
}
|
||
/* update flags */
|
||
mbx_flag (stream,NIL,NIL,NIL);
|
||
}
|
||
if (dstream != stream) mail_close (dstream);
|
||
return ret;
|
||
}
|
||
|
||
/* MBX mail append message from stringstruct
|
||
* Accepts: MAIL stream
|
||
* destination mailbox
|
||
* append callback
|
||
* data for callback
|
||
* Returns: T if append successful, else NIL
|
||
*/
|
||
|
||
long mbx_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data)
|
||
{
|
||
struct stat sbuf;
|
||
int fd,ld;
|
||
char *flags,*date,tmp[MAILTMPLEN],file[MAILTMPLEN],lock[MAILTMPLEN];
|
||
time_t tp[2];
|
||
FILE *df;
|
||
MESSAGECACHE elt;
|
||
long f;
|
||
unsigned long i,uf;
|
||
STRING *message;
|
||
long ret = NIL;
|
||
MAILSTREAM *dstream = NIL;
|
||
appenduid_t au = (appenduid_t) mail_parameters (NIL,GET_APPENDUID,NIL);
|
||
SEARCHSET *dst = au ? mail_newsearchset () : NIL;
|
||
/* make sure valid mailbox */
|
||
if ((fd = mbx_isvalid (&dstream,mailbox,file,&ld,lock,
|
||
au ? MBXISVALIDUID : MBXISVALIDNOUID)) < 0)
|
||
switch (errno) {
|
||
case ENOENT: /* no such file? */
|
||
if (compare_cstring (mailbox,"INBOX")) {
|
||
MM_NOTIFY (stream,"[TRYCREATE] Must create mailbox before append",NIL);
|
||
return NIL;
|
||
}
|
||
/* can create INBOX here */
|
||
mbx_create (dstream = stream ? stream : user_flags (&mbxproto),"INBOX");
|
||
if ((fd = mbx_isvalid (&dstream,mailbox,file,&ld,lock,
|
||
au ? MBXISVALIDUID : MBXISVALIDNOUID)) >= 0)
|
||
break;
|
||
case EACCES: /* file protected */
|
||
sprintf (tmp,"Can't access destination: %.80s",mailbox);
|
||
MM_LOG (tmp,ERROR);
|
||
return NIL;
|
||
case EINVAL:
|
||
sprintf (tmp,"Invalid MBX-format mailbox name: %.80s",mailbox);
|
||
MM_LOG (tmp,ERROR);
|
||
return NIL;
|
||
default:
|
||
sprintf (tmp,"Not a MBX-format mailbox: %.80s",mailbox);
|
||
MM_LOG (tmp,ERROR);
|
||
return NIL;
|
||
}
|
||
|
||
/* get first message */
|
||
if (!MM_APPEND (af) (dstream,data,&flags,&date,&message)) close (fd);
|
||
else if (!(df = fdopen (fd,"r+b"))) {
|
||
MM_LOG ("Unable to reopen append mailbox",ERROR);
|
||
close (fd);
|
||
}
|
||
else {
|
||
MM_CRITICAL (dstream); /* go critical */
|
||
fstat (fd,&sbuf); /* get current file size */
|
||
fseek (df,sbuf.st_size,SEEK_SET);
|
||
errno = 0;
|
||
for (ret = LONGT; ret && message; ) {
|
||
if (!SIZE (message)) { /* guard against zero-length */
|
||
MM_LOG ("Append of zero-length message",ERROR);
|
||
ret = NIL;
|
||
break;
|
||
}
|
||
f = mail_parse_flags (dstream,flags,&uf);
|
||
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;%08lx%04lx-%08lx\015\012",tmp,i = SIZE (message),
|
||
uf,(unsigned long) f,au ? ++dstream->uid_last : 0) < 0)
|
||
ret = NIL;
|
||
else { /* write message */
|
||
size_t j;
|
||
if (!message->cursize) SETPOS (message,GETPOS (message));
|
||
while (i && (j = fwrite (message->curpos,1,message->cursize,df))) {
|
||
i -= j;
|
||
SETPOS (message,GETPOS (message) + j);
|
||
}
|
||
/* get next message */
|
||
if (i || !MM_APPEND (af) (dstream,data,&flags,&date,&message))
|
||
ret = NIL;
|
||
else if (au) mail_append_set (dst,dstream->uid_last);
|
||
}
|
||
}
|
||
|
||
/* if error... */
|
||
if (!ret || (fflush (df) == EOF)) {
|
||
/* revert file */
|
||
ftruncate (fd,sbuf.st_size);
|
||
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 (au && ret) { /* return sets if doing APPENDUID */
|
||
(*au) (mailbox,dstream->uid_validity,dst);
|
||
fseek (df,15,SEEK_SET); /* update UIDLAST */
|
||
fprintf (df,"%08lx",dstream->uid_last);
|
||
}
|
||
else mail_free_searchset (&dst);
|
||
/* set atime to now-1 if successful copy */
|
||
if (ret) tp[0] = time (0) - 1;
|
||
/* else preserve \Marked status */
|
||
else tp[0] = (sbuf.st_ctime > sbuf.st_atime) ? sbuf.st_atime : time(0);
|
||
tp[1] = sbuf.st_mtime; /* preserve mtime */
|
||
set_utime_from_tp(file,tp); /* set the times */
|
||
fclose (df); /* close the file */
|
||
MM_NOCRITICAL (dstream); /* release critical */
|
||
}
|
||
unlockfd (ld,lock); /* release exclusive parse/append permission */
|
||
if (dstream != stream) mail_close (dstream);
|
||
return ret;
|
||
}
|
||
|
||
/* Internal routines */
|
||
|
||
|
||
/* MBX mail generate file string
|
||
* Accepts: temporary buffer to write into
|
||
* mailbox name string
|
||
* Returns: local file string or NIL if failure
|
||
*/
|
||
|
||
char *mbx_file (char *dst,char *name)
|
||
{
|
||
char *s = mailboxfile (dst,name);
|
||
return (s && !*s) ? mailboxfile (dst,"~/INBOX") : s;
|
||
}
|
||
|
||
/* MBX mail parse mailbox
|
||
* Accepts: MAIL stream
|
||
* Returns: T if parse OK
|
||
* NIL if failure, stream aborted
|
||
*/
|
||
|
||
long mbx_parse (MAILSTREAM *stream)
|
||
{
|
||
struct stat sbuf;
|
||
MESSAGECACHE *elt = NIL;
|
||
unsigned char c,*s,*t,*x;
|
||
char tmp[MAILTMPLEN];
|
||
unsigned long i,j,k,m;
|
||
off_t curpos = LOCAL->filesize;
|
||
unsigned long nmsgs = stream->nmsgs;
|
||
unsigned long recent = stream->recent;
|
||
unsigned long lastuid = 0;
|
||
short dirty = NIL;
|
||
short added = NIL;
|
||
short silent = stream->silent;
|
||
short uidwarn = T;
|
||
fstat (LOCAL->fd,&sbuf); /* get status */
|
||
if (sbuf.st_size < curpos) { /* sanity check */
|
||
sprintf (tmp,"Mailbox shrank from %lu to %lu!",
|
||
(unsigned long) curpos,(unsigned long) sbuf.st_size);
|
||
MM_LOG (tmp,ERROR);
|
||
mbx_abort (stream);
|
||
return NIL;
|
||
}
|
||
lseek (LOCAL->fd,0,L_SET); /* rewind file */
|
||
/* read internal header */
|
||
read (LOCAL->fd,LOCAL->buf,HDRSIZE);
|
||
LOCAL->buf[HDRSIZE] = '\0'; /* tie off header */
|
||
c = LOCAL->buf[15]; /* save first character of last UID */
|
||
LOCAL->buf[15] = '\0';
|
||
/* parse UID validity */
|
||
stream->uid_validity = strtoul (LOCAL->buf + 7,NIL,16);
|
||
LOCAL->buf[15] = c; /* restore first character of last UID */
|
||
/* parse last UID */
|
||
i = strtoul (LOCAL->buf + 15,NIL,16);
|
||
stream->uid_last = stream->rdonly ? max (i,stream->uid_last) : i;
|
||
/* parse user flags */
|
||
for (i = 0, s = LOCAL->buf + 25;
|
||
(i < NUSERFLAGS) && (t = strchr (s,'\015')) && (t - s);
|
||
i++, s = t + 2) {
|
||
*t = '\0'; /* tie off flag */
|
||
if (!stream->user_flags[i] && (strlen (s) <= MAXUSERFLAG))
|
||
stream->user_flags[i] = cpystr (s);
|
||
}
|
||
LOCAL->ffuserflag = (int) i; /* first free user flag */
|
||
|
||
/* get current last flag updater PID */
|
||
i = (isxdigit (LOCAL->buf[HDRSIZE-10]) && isxdigit (LOCAL->buf[HDRSIZE-9]) &&
|
||
isxdigit (LOCAL->buf[HDRSIZE-8]) && isxdigit (LOCAL->buf[HDRSIZE-7]) &&
|
||
isxdigit (LOCAL->buf[HDRSIZE-6]) && isxdigit (LOCAL->buf[HDRSIZE-5]) &&
|
||
isxdigit (LOCAL->buf[HDRSIZE-4]) && isxdigit (LOCAL->buf[HDRSIZE-3]) &&
|
||
(LOCAL->buf[HDRSIZE-2] == '\015') && (LOCAL->buf[HDRSIZE-1] == '\012'))?
|
||
strtoul (LOCAL->buf + HDRSIZE - 8,NIL,16) : 0;
|
||
/* set flagcheck if lastpid changed */
|
||
if (LOCAL->lastpid && (LOCAL->lastpid != i)) LOCAL->flagcheck = T;
|
||
LOCAL->lastpid = i; /* set as last PID */
|
||
stream->silent = T; /* don't pass up 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);
|
||
mbx_abort (stream);
|
||
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: %.80s",
|
||
(unsigned long) curpos,i,(char *) LOCAL->buf);
|
||
MM_LOG (tmp,ERROR);
|
||
mbx_abort (stream);
|
||
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: %.80s",
|
||
(unsigned long) curpos,(char *) LOCAL->buf);
|
||
MM_LOG (tmp,ERROR);
|
||
mbx_abort (stream);
|
||
return NIL;
|
||
}
|
||
if (!(isxdigit (t[1]) && isxdigit (t[2]) && isxdigit (t[3]) &&
|
||
isxdigit (t[4]) && isxdigit (t[5]) && isxdigit (t[6]) &&
|
||
isxdigit (t[7]) && isxdigit (t[8]) && isxdigit (t[9]) &&
|
||
isxdigit (t[10]) && isxdigit (t[11]) && isxdigit (t[12]))) {
|
||
sprintf (tmp,"Unable to parse message flags at %lu: %.80s",
|
||
(unsigned long) curpos,(char *) LOCAL->buf);
|
||
MM_LOG (tmp,ERROR);
|
||
mbx_abort (stream);
|
||
return NIL;
|
||
}
|
||
if ((t[13] != '-') || t[22] ||
|
||
!(isxdigit (t[14]) && isxdigit (t[15]) && isxdigit (t[16]) &&
|
||
isxdigit (t[17]) && isxdigit (t[18]) && isxdigit (t[19]) &&
|
||
isxdigit (t[20]) && isxdigit (t[21]))) {
|
||
sprintf (tmp,"Unable to parse message UID at %lu: %.80s",
|
||
(unsigned long) curpos,(char *) LOCAL->buf);
|
||
MM_LOG (tmp,ERROR);
|
||
mbx_abort (stream);
|
||
return NIL;
|
||
}
|
||
|
||
*s++ = '\0'; *t++ = '\0'; /* break up fields */
|
||
/* get message size */
|
||
if (!(j = strtoul (s,(char **) &x,10)) && (!(x && *x))) {
|
||
sprintf (tmp,"Unable to parse message size at %lu: %.80s,%.80s;%.80s",
|
||
(unsigned long) curpos,(char *) LOCAL->buf,(char *) s,
|
||
(char *) t);
|
||
MM_LOG (tmp,ERROR);
|
||
mbx_abort (stream);
|
||
return NIL;
|
||
}
|
||
/* make sure didn't run off end of file */
|
||
if (((off_t) (curpos + i + j)) > sbuf.st_size) {
|
||
sprintf (tmp,"Last message (at %lu) runs past end of file (%lu > %lu)",
|
||
(unsigned long) curpos,(unsigned long) (curpos + i + j),
|
||
(unsigned long) sbuf.st_size);
|
||
MM_LOG (tmp,ERROR);
|
||
mbx_abort (stream);
|
||
return NIL;
|
||
}
|
||
/* parse UID */
|
||
if ((m = strtoul (t+13,NIL,16)) &&
|
||
((m <= lastuid) || (m > stream->uid_last))) {
|
||
if (uidwarn) {
|
||
sprintf (tmp,"Invalid UID %08lx in message %lu, rebuilding UIDs",
|
||
m,nmsgs+1);
|
||
MM_LOG (tmp,WARN);
|
||
uidwarn = NIL;
|
||
/* restart UID validity */
|
||
stream->uid_validity = time (0);
|
||
}
|
||
m = 0; /* lose this UID */
|
||
dirty = T; /* mark dirty, set new lastuid */
|
||
stream->uid_last = lastuid;
|
||
}
|
||
|
||
t[12] = '\0'; /* parse system flags */
|
||
if ((k = strtoul (t+8,NIL,16)) & fEXPUNGED) {
|
||
if (m) lastuid = m; /* expunge message, update last UID seen */
|
||
else { /* no UID assigned? */
|
||
lastuid = ++stream->uid_last;
|
||
dirty = T;
|
||
}
|
||
}
|
||
else { /* not expunged, swell the cache */
|
||
added = T; /* note that a new message was added */
|
||
mail_exists (stream,++nmsgs);
|
||
/* instantiate an elt for this message */
|
||
(elt = mail_elt (stream,nmsgs))->valid = T;
|
||
/* parse the date */
|
||
if (!mail_parse_date (elt,LOCAL->buf)) {
|
||
sprintf (tmp,"Unable to parse message date at %lu: %.80s",
|
||
(unsigned long) curpos,(char *) LOCAL->buf);
|
||
MM_LOG (tmp,ERROR);
|
||
mbx_abort (stream);
|
||
return NIL;
|
||
}
|
||
/* note file offset of header */
|
||
elt->private.special.offset = curpos;
|
||
/* and internal header size */
|
||
elt->private.special.text.size = i;
|
||
/* header size not known yet */
|
||
elt->private.msg.header.text.size = 0;
|
||
elt->rfc822_size = j; /* note message size */
|
||
/* calculate system flags */
|
||
if (k & fSEEN) elt->seen = T;
|
||
if (k & fDELETED) elt->deleted = T;
|
||
if (k & fFLAGGED) elt->flagged = T;
|
||
if (k & fANSWERED) elt->answered = T;
|
||
if (k & fDRAFT) elt->draft = T;
|
||
t[8] = '\0'; /* get user flags value */
|
||
elt->user_flags = strtoul (t,NIL,16);
|
||
/* UID already assigned? */
|
||
if (!(elt->private.uid = m) || !(k & fOLD)) {
|
||
elt->recent = T; /* no, mark as recent */
|
||
++recent; /* count up a new recent message */
|
||
dirty = T; /* and must rewrite header */
|
||
/* assign new UID */
|
||
if (!elt->private.uid) elt->private.uid = ++stream->uid_last;
|
||
mbx_update_status (stream,elt->msgno,NIL);
|
||
}
|
||
/* update last parsed UID */
|
||
lastuid = elt->private.uid;
|
||
}
|
||
curpos += i + j; /* update position */
|
||
}
|
||
|
||
if (dirty && !stream->rdonly){/* update header */
|
||
mbx_update_header (stream);
|
||
fsync (LOCAL->fd); /* make sure all the UID updates 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 */
|
||
time_t tp[2];
|
||
tp[0] = time (0);
|
||
tp[1] = LOCAL->filetime;
|
||
set_utime_from_tp(stream->mailbox,tp);
|
||
}
|
||
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 */
|
||
}
|
||
|
||
/* MBX get cache element with status updating from file
|
||
* Accepts: MAIL stream
|
||
* message number
|
||
* expunge OK flag
|
||
* Returns: cache element
|
||
*/
|
||
|
||
MESSAGECACHE *mbx_elt (MAILSTREAM *stream,unsigned long msgno,long expok)
|
||
{
|
||
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;
|
||
/* get new flags */
|
||
if (mbx_read_flags (stream,elt) && expok) {
|
||
mail_expunged (stream,elt->msgno);
|
||
return NIL; /* return this message was expunged */
|
||
}
|
||
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;
|
||
}
|
||
|
||
/* MBX read flags from file
|
||
* Accepts: MAIL stream
|
||
* cache element
|
||
* Returns: non-NIL if message expunged
|
||
*/
|
||
|
||
unsigned long mbx_read_flags (MAILSTREAM *stream,MESSAGECACHE *elt)
|
||
{
|
||
unsigned long i;
|
||
struct stat sbuf;
|
||
fstat (LOCAL->fd,&sbuf); /* get status */
|
||
/* make sure file size is good */
|
||
if (sbuf.st_size < LOCAL->filesize) {
|
||
sprintf (LOCAL->buf,"Mailbox shrank from %lu to %lu in flag read!",
|
||
(unsigned long) LOCAL->filesize,(unsigned long) sbuf.st_size);
|
||
fatal (LOCAL->buf);
|
||
}
|
||
/* set the seek pointer */
|
||
lseek (LOCAL->fd,(off_t) elt->private.special.offset +
|
||
elt->private.special.text.size - 24,L_SET);
|
||
/* read the new flags */
|
||
if (read (LOCAL->fd,LOCAL->buf,14) < 0) {
|
||
sprintf (LOCAL->buf,"Unable to read new status: %s",strerror (errno));
|
||
fatal (LOCAL->buf);
|
||
}
|
||
if ((LOCAL->buf[0] != ';') || (LOCAL->buf[13] != '-')) {
|
||
LOCAL->buf[14] = '\0'; /* tie off buffer for error message */
|
||
sprintf (LOCAL->buf+50,"Invalid flags for message %lu (%lu %lu): %s",
|
||
elt->msgno,elt->private.special.offset,
|
||
elt->private.special.text.size,(char *) LOCAL->buf);
|
||
fatal (LOCAL->buf+50);
|
||
}
|
||
LOCAL->buf[13] = '\0'; /* tie off buffer */
|
||
/* calculate system flags */
|
||
i = strtoul (LOCAL->buf+9,NIL,16);
|
||
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->expunged |= i & fEXPUNGED ? T : NIL;
|
||
LOCAL->buf[9] = '\0'; /* tie off flags */
|
||
/* get user flags value */
|
||
elt->user_flags = strtoul (LOCAL->buf+1,NIL,16);
|
||
elt->valid = T; /* have valid flags now */
|
||
return i & fEXPUNGED;
|
||
}
|
||
|
||
/* MBX update header
|
||
* Accepts: MAIL stream
|
||
*/
|
||
|
||
#ifndef CYGKLUDGEOFFSET
|
||
#define CYGKLUDGEOFFSET 0
|
||
#endif
|
||
|
||
void mbx_update_header (MAILSTREAM *stream)
|
||
{
|
||
int i;
|
||
char *s = LOCAL->buf;
|
||
memset (s,'\0',HDRSIZE); /* initialize header */
|
||
sprintf (s,"*mbx*\015\012%08lx%08lx\015\012",
|
||
stream->uid_validity,stream->uid_last);
|
||
for (i = 0; (i < NUSERFLAGS) && stream->user_flags[i]; ++i)
|
||
sprintf (s += strlen (s),"%s\015\012",stream->user_flags[i]);
|
||
LOCAL->ffuserflag = i; /* first free user flag */
|
||
/* can we create more user flags? */
|
||
stream->kwd_create = (i < NUSERFLAGS) ? T : NIL;
|
||
/* write reserved lines */
|
||
while (i++ < NUSERFLAGS) strcat (s,"\015\012");
|
||
sprintf (LOCAL->buf + HDRSIZE - 10,"%08lx\015\012",LOCAL->lastpid);
|
||
while (T) { /* rewind file */
|
||
lseek (LOCAL->fd,CYGKLUDGEOFFSET,L_SET);
|
||
/* write new header */
|
||
if (write (LOCAL->fd,LOCAL->buf + CYGKLUDGEOFFSET,
|
||
HDRSIZE - CYGKLUDGEOFFSET) > 0) break;
|
||
MM_NOTIFY (stream,strerror (errno),WARN);
|
||
MM_DISKERROR (stream,errno,T);
|
||
}
|
||
}
|
||
|
||
/* MBX update status string
|
||
* Accepts: MAIL stream
|
||
* message number
|
||
* flags
|
||
*/
|
||
|
||
void mbx_update_status (MAILSTREAM *stream,unsigned long msgno,long flags)
|
||
{
|
||
struct stat sbuf;
|
||
MESSAGECACHE *elt = mail_elt (stream,msgno);
|
||
/* readonly */
|
||
if (stream->rdonly || !elt->valid) mbx_read_flags (stream,elt);
|
||
else { /* readwrite */
|
||
fstat (LOCAL->fd,&sbuf); /* get status */
|
||
/* make sure file size is good */
|
||
if (sbuf.st_size < LOCAL->filesize) {
|
||
sprintf (LOCAL->buf,"Mailbox shrank from %lu to %lu in flag update!",
|
||
(unsigned long) LOCAL->filesize,(unsigned long) sbuf.st_size);
|
||
fatal (LOCAL->buf);
|
||
}
|
||
/* set the seek pointer */
|
||
lseek (LOCAL->fd,(off_t) elt->private.special.offset +
|
||
elt->private.special.text.size - 24,L_SET);
|
||
/* read the new flags */
|
||
if (read (LOCAL->fd,LOCAL->buf,14) < 0) {
|
||
sprintf (LOCAL->buf,"Unable to read old status: %s",strerror (errno));
|
||
fatal (LOCAL->buf);
|
||
}
|
||
if ((LOCAL->buf[0] != ';') || (LOCAL->buf[13] != '-')) {
|
||
LOCAL->buf[14] = '\0'; /* tie off buffer for error message */
|
||
sprintf (LOCAL->buf+50,"Invalid flags for message %lu (%lu %lu): %s",
|
||
elt->msgno,elt->private.special.offset,
|
||
elt->private.special.text.size,(char *) LOCAL->buf);
|
||
fatal (LOCAL->buf+50);
|
||
}
|
||
/* print new flag string */
|
||
sprintf (LOCAL->buf,"%08lx%04x-%08lx",elt->user_flags,(unsigned)
|
||
(((elt->deleted && flags) ?
|
||
fEXPUNGED : (strtoul (LOCAL->buf+9,NIL,16)) & fEXPUNGED) +
|
||
(fSEEN * elt->seen) + (fDELETED * elt->deleted) +
|
||
(fFLAGGED * elt->flagged) + (fANSWERED * elt->answered) +
|
||
(fDRAFT * elt->draft) + fOLD),elt->private.uid);
|
||
while (T) { /* get to that place in the file */
|
||
lseek (LOCAL->fd,(off_t) elt->private.special.offset +
|
||
elt->private.special.text.size - 23,L_SET);
|
||
/* write new flags and UID */
|
||
if (write (LOCAL->fd,LOCAL->buf,21) > 0) break;
|
||
MM_NOTIFY (stream,strerror (errno),WARN);
|
||
MM_DISKERROR (stream,errno,T);
|
||
}
|
||
}
|
||
}
|
||
|
||
/* MBX locate header for a message
|
||
* Accepts: MAIL stream
|
||
* message number
|
||
* pointer to returned header size
|
||
* pointer to possible returned header
|
||
* Returns: position of header in file
|
||
*/
|
||
|
||
#define HDRBUFLEN 16384 /* good enough for most headers */
|
||
#define SLOP 4 /* CR LF CR LF */
|
||
|
||
unsigned long mbx_hdrpos (MAILSTREAM *stream,unsigned long msgno,
|
||
unsigned long *size,char **hdr)
|
||
{
|
||
unsigned long siz,done;
|
||
long i;
|
||
unsigned char *s,*t,*te;
|
||
MESSAGECACHE *elt = mail_elt (stream,msgno);
|
||
unsigned long ret = elt->private.special.offset +
|
||
elt->private.special.text.size;
|
||
if (hdr) *hdr = NIL; /* assume no header returned */
|
||
/* is header size known? */
|
||
if (*size = elt->private.msg.header.text.size) return ret;
|
||
/* paranoia check */
|
||
if (LOCAL->buflen < (HDRBUFLEN + SLOP))
|
||
fatal ("LOCAL->buf smaller than HDRBUFLEN");
|
||
lseek (LOCAL->fd,ret,L_SET); /* get to header position */
|
||
/* read HDRBUFLEN chunks with 4 byte slop */
|
||
for (done = siz = 0, s = LOCAL->buf;
|
||
(i = min ((long) (elt->rfc822_size - done),(long) HDRBUFLEN)) &&
|
||
(read (LOCAL->fd,s,i) == i);
|
||
done += i, siz += (t - LOCAL->buf) - SLOP, s = LOCAL->buf + SLOP) {
|
||
te = (t = s + i) - 12; /* calculate end of fast scan */
|
||
/* fast scan for CR */
|
||
for (s = LOCAL->buf; s < te;)
|
||
if (((*s++ == '\015') || (*s++ == '\015') || (*s++ == '\015') ||
|
||
(*s++ == '\015') || (*s++ == '\015') || (*s++ == '\015') ||
|
||
(*s++ == '\015') || (*s++ == '\015') || (*s++ == '\015') ||
|
||
(*s++ == '\015') || (*s++ == '\015') || (*s++ == '\015')) &&
|
||
(*s == '\012') && (*++s == '\015') && (*++s == '\012')) {
|
||
*size = elt->private.msg.header.text.size = siz + (++s - LOCAL->buf);
|
||
if (hdr) *hdr = LOCAL->buf;
|
||
return ret;
|
||
}
|
||
for (te = t - 3; (s < te);) /* final character-at-a-time scan */
|
||
if ((*s++ == '\015') && (*s == '\012') && (*++s == '\015') &&
|
||
(*++s == '\012')) {
|
||
*size = elt->private.msg.header.text.size = siz + (++s - LOCAL->buf);
|
||
if (hdr) *hdr = LOCAL->buf;
|
||
return ret;
|
||
}
|
||
if (i <= SLOP) break; /* end of data */
|
||
/* slide over last 4 bytes */
|
||
memmove (LOCAL->buf,t - SLOP,SLOP);
|
||
hdr = NIL; /* can't return header this way */
|
||
}
|
||
/* not found: header consumes entire message */
|
||
elt->private.msg.header.text.size = *size = elt->rfc822_size;
|
||
if (hdr) *hdr = LOCAL->buf; /* possibly return header too */
|
||
return ret;
|
||
}
|
||
|
||
/* MBX mail rewrite mailbox
|
||
* Accepts: MAIL stream
|
||
* pointer to return reclaimed size
|
||
* flags (0 = no expunge, 1 = expunge deleted, -1 = expunge sequence)
|
||
* Returns: number of expunged messages
|
||
*/
|
||
|
||
unsigned long mbx_rewrite (MAILSTREAM *stream,unsigned long *reclaimed,
|
||
long flags)
|
||
{
|
||
time_t tp[2];
|
||
struct stat sbuf;
|
||
off_t pos,ppos;
|
||
int ld;
|
||
unsigned long i,j,k,m,delta;
|
||
unsigned long n = *reclaimed = 0;
|
||
unsigned long recent = 0;
|
||
char lock[MAILTMPLEN];
|
||
MESSAGECACHE *elt;
|
||
blocknotify_t bn = (blocknotify_t) mail_parameters (NIL,GET_BLOCKNOTIFY,NIL);
|
||
/* The cretins who designed flock() created a window of vulnerability in
|
||
* upgrading locks from shared to exclusive or downgrading from exclusive
|
||
* to shared. Rather than maintain the lock at shared status at a minimum,
|
||
* flock() actually *releases* the former lock. Obviously they never talked
|
||
* to any database guys. Fortunately, we have the parse/append permission
|
||
* lock. If we require this lock before going exclusive on the mailbox,
|
||
* another process can not sneak in and steal the exclusive mailbox lock on
|
||
* us, because it will block on trying to get parse/append permission first.
|
||
*/
|
||
/* get parse/append permission */
|
||
if ((ld = lockfd (LOCAL->fd,lock,LOCK_EX)) < 0) {
|
||
MM_LOG ("Unable to lock mailbox for rewrite",ERROR);
|
||
return 0;
|
||
}
|
||
fstat (LOCAL->fd,&sbuf); /* get current write time */
|
||
if (LOCAL->filetime && !LOCAL->flagcheck &&
|
||
(LOCAL->filetime < sbuf.st_mtime)) LOCAL->flagcheck = T;
|
||
if (!mbx_parse (stream)) { /* make sure see any newly-arrived messages */
|
||
unlockfd (ld,lock); /* failed?? */
|
||
return 0;
|
||
}
|
||
if (LOCAL->flagcheck) { /* sweep flags if need flagcheck */
|
||
LOCAL->filetime = sbuf.st_mtime;
|
||
for (i = 1; i <= stream->nmsgs; ++i) mbx_elt (stream,i,NIL);
|
||
LOCAL->flagcheck = NIL;
|
||
}
|
||
|
||
/* get exclusive access */
|
||
if (!flock (LOCAL->fd,LOCK_EX|LOCK_NB)) {
|
||
MM_CRITICAL (stream); /* go critical */
|
||
for (i = 1,delta = 0,pos = ppos = HDRSIZE; i <= stream->nmsgs; ) {
|
||
/* note if message not at predicted location */
|
||
if (m = (elt = mbx_elt (stream,i,NIL))->private.special.offset - ppos) {
|
||
ppos = elt->private.special.offset;
|
||
*reclaimed += m; /* note reclaimed message space */
|
||
delta += m; /* and as expunge delta */
|
||
}
|
||
/* number of bytes to smash or preserve */
|
||
ppos += (k = elt->private.special.text.size + elt->rfc822_size);
|
||
/* if need to expunge this message*/
|
||
if (flags && elt->deleted && ((flags > 0) || elt->sequence)) {
|
||
delta += k; /* number of bytes to delete */
|
||
mail_expunged(stream,i);/* notify upper levels */
|
||
n++; /* count up one more expunged message */
|
||
}
|
||
else { /* preserved message */
|
||
i++; /* count this message */
|
||
if (elt->recent) ++recent;
|
||
if (delta) { /* moved, note 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 yet */
|
||
else pos = elt->private.special.offset + k;
|
||
}
|
||
}
|
||
/* deltaed file size match position? */
|
||
if (m = (LOCAL->filesize -= delta) - pos) {
|
||
*reclaimed += m; /* probably an fEXPUNGED msg */
|
||
LOCAL->filesize = pos; /* set correct size */
|
||
}
|
||
/* truncate file after last message */
|
||
ftruncate (LOCAL->fd,LOCAL->filesize);
|
||
fsync (LOCAL->fd); /* force disk update */
|
||
MM_NOCRITICAL (stream); /* release critical */
|
||
(*bn) (BLOCK_FILELOCK,NIL);
|
||
flock (LOCAL->fd,LOCK_SH); /* allow sharers again */
|
||
(*bn) (BLOCK_NONE,NIL);
|
||
}
|
||
|
||
else { /* can't get exclusive */
|
||
(*bn) (BLOCK_FILELOCK,NIL);
|
||
flock (LOCAL->fd,LOCK_SH); /* recover previous shared mailbox lock */
|
||
(*bn) (BLOCK_NONE,NIL);
|
||
/* do hide-expunge when shared */
|
||
if (flags) for (i = 1; i <= stream->nmsgs; ) {
|
||
if (elt = mbx_elt (stream,i,T)) {
|
||
/* make the message invisible */
|
||
if (elt->deleted && ((flags > 0) || elt->sequence)) {
|
||
mbx_update_status (stream,elt->msgno,LONGT);
|
||
/* notify upper levels */
|
||
mail_expunged (stream,i);
|
||
n++; /* count up one more expunged message */
|
||
}
|
||
else {
|
||
i++; /* preserved message */
|
||
if (elt->recent) ++recent;
|
||
}
|
||
}
|
||
else n++; /* count up one more expunged message */
|
||
}
|
||
fsync (LOCAL->fd); /* force disk update */
|
||
}
|
||
fstat (LOCAL->fd,&sbuf); /* get new write time */
|
||
tp[1] = LOCAL->filetime = sbuf.st_mtime;
|
||
tp[0] = time (0); /* reset atime to now */
|
||
set_utime_from_tp(stream->mailbox,tp);
|
||
unlockfd (ld,lock); /* release exclusive parse/append permission */
|
||
/* notify upper level of new mailbox size */
|
||
mail_exists (stream,stream->nmsgs);
|
||
mail_recent (stream,recent);
|
||
return n; /* return number of expunged messages */
|
||
}
|
||
|
||
/* MBX mail lock for flag updating
|
||
* Accepts: stream
|
||
* Returns: T if successful, NIL if failure
|
||
*/
|
||
|
||
long mbx_flaglock (MAILSTREAM *stream)
|
||
{
|
||
struct stat sbuf;
|
||
unsigned long i;
|
||
int ld;
|
||
char lock[MAILTMPLEN];
|
||
/* no-op if readonly or already locked */
|
||
if (!stream->rdonly && LOCAL && (LOCAL->fd >= 0) && (LOCAL->ld < 0)) {
|
||
/* lock now */
|
||
if ((ld = lockfd (LOCAL->fd,lock,LOCK_EX)) < 0) return NIL;
|
||
if (!LOCAL->flagcheck) { /* don't do this if flagcheck already needed */
|
||
if (LOCAL->filetime) { /* know previous time? */
|
||
fstat (LOCAL->fd,&sbuf);/* get current write time */
|
||
if (LOCAL->filetime < sbuf.st_mtime) LOCAL->flagcheck = T;
|
||
LOCAL->filetime = 0; /* don't do this test for any other messages */
|
||
}
|
||
if (!mbx_parse (stream)) {/* parse mailbox */
|
||
unlockfd (ld,lock); /* shouldn't happen */
|
||
return NIL;
|
||
}
|
||
if (LOCAL->flagcheck) /* invalidate cache if flagcheck */
|
||
for (i = 1; i <= stream->nmsgs; ++i) mail_elt (stream,i)->valid = NIL;
|
||
}
|
||
LOCAL->ld = ld; /* copy to stream for subsequent calls */
|
||
memcpy (LOCAL->lock,lock,MAILTMPLEN);
|
||
}
|
||
return LONGT;
|
||
}
|