1372 lines
45 KiB
C
1372 lines
45 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: MTX 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: 22 May 1990
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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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/* MTX I/O stream local data */
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typedef struct mtx_local {
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unsigned int shouldcheck: 1; /* if ping should do a check instead */
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unsigned int mustcheck: 1; /* if ping must do a check instead */
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int fd; /* file descriptor for I/O */
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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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} MTXLOCAL;
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/* Convenient access to local data */
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#define LOCAL ((MTXLOCAL *) stream->local)
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/* Function prototypes */
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DRIVER *mtx_valid (char *name);
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int mtx_isvalid (char *name,char *tmp);
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void *mtx_parameters (long function,void *value);
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void mtx_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents);
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void mtx_list (MAILSTREAM *stream,char *ref,char *pat);
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void mtx_lsub (MAILSTREAM *stream,char *ref,char *pat);
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long mtx_create (MAILSTREAM *stream,char *mailbox);
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long mtx_delete (MAILSTREAM *stream,char *mailbox);
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long mtx_rename (MAILSTREAM *stream,char *old,char *newname);
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long mtx_status (MAILSTREAM *stream,char *mbx,long flags);
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MAILSTREAM *mtx_open (MAILSTREAM *stream);
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void mtx_close (MAILSTREAM *stream,long options);
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void mtx_flags (MAILSTREAM *stream,char *sequence,long flags);
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char *mtx_header (MAILSTREAM *stream,unsigned long msgno,
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unsigned long *length,long flags);
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long mtx_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags);
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void mtx_flag (MAILSTREAM *stream,char *sequence,char *flag,long flags);
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void mtx_flagmsg (MAILSTREAM *stream,MESSAGECACHE *elt);
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long mtx_ping (MAILSTREAM *stream);
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void mtx_check (MAILSTREAM *stream);
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void mtx_snarf (MAILSTREAM *stream);
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long mtx_expunge (MAILSTREAM *stream,char *sequence,long options);
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long mtx_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options);
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long mtx_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data);
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char *mtx_file (char *dst,char *name);
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long mtx_parse (MAILSTREAM *stream);
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MESSAGECACHE *mtx_elt (MAILSTREAM *stream,unsigned long msgno);
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void mtx_read_flags (MAILSTREAM *stream,MESSAGECACHE *elt);
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void mtx_update_status (MAILSTREAM *stream,unsigned long msgno,long syncflag);
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unsigned long mtx_hdrpos (MAILSTREAM *stream,unsigned long msgno,
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unsigned long *size);
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/* MTX mail routines */
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/* Driver dispatch used by MAIL */
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DRIVER mtxdriver = {
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"mtx", /* driver name */
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/* driver flags */
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DR_LOCAL|DR_MAIL|DR_CRLF|DR_NOSTICKY|DR_LOCKING,
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(DRIVER *) NIL, /* next driver */
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mtx_valid, /* mailbox is valid for us */
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mtx_parameters, /* manipulate parameters */
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mtx_scan, /* scan mailboxes */
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mtx_list, /* list mailboxes */
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mtx_lsub, /* list subscribed mailboxes */
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NIL, /* subscribe to mailbox */
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NIL, /* unsubscribe from mailbox */
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dummy_create, /* create mailbox */
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mtx_delete, /* delete mailbox */
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mtx_rename, /* rename mailbox */
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mtx_status, /* status of mailbox */
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mtx_open, /* open mailbox */
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mtx_close, /* close mailbox */
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mtx_flags, /* fetch message "fast" attributes */
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mtx_flags, /* fetch message flags */
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NIL, /* fetch overview */
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NIL, /* fetch message envelopes */
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mtx_header, /* fetch message header */
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mtx_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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mtx_flag, /* modify flags */
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mtx_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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mtx_ping, /* ping mailbox to see if still alive */
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mtx_check, /* check for new messages */
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mtx_expunge, /* expunge deleted messages */
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mtx_copy, /* copy messages to another mailbox */
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mtx_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 mtxproto = {&mtxdriver};
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/* MTX 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 *mtx_valid (char *name)
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{
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char tmp[MAILTMPLEN];
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return mtx_isvalid (name,tmp) ? &mtxdriver : NIL;
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}
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/* MTX mail test for valid mailbox
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* Accepts: mailbox name
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* Returns: T if valid, NIL otherwise
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*/
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int mtx_isvalid (char *name,char *tmp)
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{
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int fd;
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int ret = NIL;
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char *s,file[MAILTMPLEN];
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struct stat sbuf;
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time_t tp[2];
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errno = EINVAL; /* assume invalid argument */
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/* if file, get its status */
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if ((s = mtx_file (file,name)) && !stat (s,&sbuf)) {
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if (!sbuf.st_size) { /* allow empty file if INBOX */
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if ((s = mailboxfile (tmp,name)) && !*s) ret = T;
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else errno = 0; /* empty file */
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}
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else if ((fd = open (file,O_RDONLY,NIL)) >= 0) {
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memset (tmp,'\0',MAILTMPLEN);
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if ((read (fd,tmp,64) >= 0) && (s = strchr (tmp,'\015')) &&
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(s[1] == '\012')) { /* valid format? */
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*s = '\0'; /* tie off header */
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/* must begin with dd-mmm-yy" */
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ret = (((tmp[2] == '-' && tmp[6] == '-') ||
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(tmp[1] == '-' && tmp[5] == '-')) &&
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(s = strchr (tmp+18,',')) && strchr (s+2,';')) ? T : NIL;
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}
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else errno = -1; /* bogus format */
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close (fd); /* close the file */
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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(file,tp); /* set the times */
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}
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}
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}
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/* in case INBOX but not mtx 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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}
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/* MTX 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 *mtx_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 = mtx_file ((char *) value,"INBOX");
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break;
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}
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return ret;
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}
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/* MTX 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 mtx_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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/* MTX 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 mtx_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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/* MTX 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 mtx_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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/* MTX 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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*/
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long mtx_delete (MAILSTREAM *stream,char *mailbox)
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{
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return mtx_rename (stream,mailbox,NIL);
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}
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/* MTX mail rename mailbox
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* Accepts: MAIL stream
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* old mailbox name
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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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*/
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long mtx_rename (MAILSTREAM *stream,char *old,char *newname)
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{
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long ret = T;
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char c,*s,tmp[MAILTMPLEN],file[MAILTMPLEN],lock[MAILTMPLEN];
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int fd,ld;
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struct stat sbuf;
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if (!mtx_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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old,newname);
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MM_LOG (tmp,ERROR);
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return NIL;
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}
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else if ((fd = open (file,O_RDWR,NIL)) < 0) {
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sprintf (tmp,"Can't open mailbox %.80s: %s",old,strerror (errno));
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MM_LOG (tmp,ERROR);
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return NIL;
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}
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/* get exclusive parse/append permission */
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if ((ld = lockfd (fd,lock,LOCK_EX)) < 0) {
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MM_LOG ("Unable to lock rename mailbox",ERROR);
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return NIL;
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}
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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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MM_LOG (tmp,ERROR);
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unlockfd (ld,lock); /* release exclusive parse/append permission */
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return NIL;
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}
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if (newname) { /* want rename? */
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if (s = strrchr (tmp,'/')) {/* found superior to destination name? */
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c = *++s; /* remember first character of inferior */
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*s = '\0'; /* tie off to get just superior */
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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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!dummy_create_path (stream,tmp,get_dir_protection (newname)))
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ret = NIL;
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else *s = c; /* restore full name */
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}
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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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strerror (errno));
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MM_LOG (tmp,ERROR);
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ret = NIL; /* set failure */
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}
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}
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else if (unlink (file)) {
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sprintf (tmp,"Can't delete mailbox %.80s: %s",old,strerror (errno));
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MM_LOG (tmp,ERROR);
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ret = NIL; /* set failure */
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}
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flock (fd,LOCK_UN); /* release lock on the file */
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close (fd); /* close the file */
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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")) dummy_create (NIL,"INBOX.MTX");
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return ret; /* return success */
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}
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/* Mtx Mail status
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* Accepts: mail stream
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* mailbox name
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* status flags
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* Returns: T on success, NIL on failure
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*/
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long mtx_status (MAILSTREAM *stream,char *mbx,long flags)
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{
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MAILSTATUS status;
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unsigned long i;
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MAILSTREAM *tstream = NIL;
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MAILSTREAM *systream = NIL;
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/* make temporary stream (unless this mbx) */
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if (!stream && !(stream = tstream =
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mail_open (NIL,mbx,OP_READONLY|OP_SILENT))) return NIL;
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status.flags = flags; /* return status values */
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status.messages = stream->nmsgs;
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status.recent = stream->recent;
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if (flags & SA_UNSEEN) /* must search to get unseen messages */
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for (i = 1,status.unseen = 0; i <= stream->nmsgs; i++)
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if (!mail_elt (stream,i)->seen) status.unseen++;
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status.uidnext = stream->uid_last + 1;
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status.uidvalidity = stream->uid_validity;
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/* calculate post-snarf results */
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if (!status.recent && stream->inbox &&
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(systream = mail_open (NIL,sysinbox (),OP_READONLY|OP_SILENT))) {
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status.messages += systream->nmsgs;
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status.recent += systream->recent;
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if (flags & SA_UNSEEN) /* must search to get unseen messages */
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for (i = 1; i <= systream->nmsgs; i++)
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if (!mail_elt (systream,i)->seen) status.unseen++;
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/* kludge but probably good enough */
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status.uidnext += systream->nmsgs;
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}
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MM_STATUS(stream,mbx,&status);/* pass status to main program */
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if (tstream) mail_close (tstream);
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if (systream) mail_close (systream);
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return T; /* success */
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}
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|
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/* MTX mail open
|
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* Accepts: stream to open
|
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* Returns: stream on success, NIL on failure
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*/
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MAILSTREAM *mtx_open (MAILSTREAM *stream)
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{
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int fd,ld;
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char tmp[MAILTMPLEN];
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blocknotify_t bn = (blocknotify_t) mail_parameters (NIL,GET_BLOCKNOTIFY,NIL);
|
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/* return prototype for OP_PROTOTYPE call */
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if (!stream) return user_flags (&mtxproto);
|
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if (stream->local) fatal ("mtx recycle stream");
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user_flags (stream); /* set up user flags */
|
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/* canonicalize the mailbox name */
|
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if (!mtx_file (tmp,stream->mailbox)) {
|
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sprintf (tmp,"Can't open - invalid name: %.80s",stream->mailbox);
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MM_LOG (tmp,ERROR);
|
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}
|
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if (stream->rdonly ||
|
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(fd = open (tmp,O_RDWR,NIL)) < 0) {
|
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if ((fd = open (tmp,O_RDONLY,NIL)) < 0) {
|
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sprintf (tmp,"Can't open mailbox: %.80s",strerror (errno));
|
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MM_LOG (tmp,ERROR);
|
||
return NIL;
|
||
}
|
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else if (!stream->rdonly) { /* got it, but readonly */
|
||
MM_LOG ("Can't get write access to mailbox, access is readonly",WARN);
|
||
stream->rdonly = T;
|
||
}
|
||
}
|
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stream->local = fs_get (sizeof (MTXLOCAL));
|
||
LOCAL->fd = fd; /* bind the file */
|
||
LOCAL->buf = (char *) fs_get (CHUNKSIZE);
|
||
LOCAL->buflen = CHUNKSIZE - 1;
|
||
/* note if an INBOX or not */
|
||
stream->inbox = !compare_cstring (stream->mailbox,"INBOX");
|
||
fs_give ((void **) &stream->mailbox);
|
||
stream->mailbox = cpystr (tmp);
|
||
/* get shared parse permission */
|
||
if ((ld = lockfd (fd,tmp,LOCK_SH)) < 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 = 0; /* initialize parsed file size */
|
||
/* time not set up yet */
|
||
LOCAL->lastsnarf = LOCAL->filetime = 0;
|
||
LOCAL->mustcheck = LOCAL->shouldcheck = NIL;
|
||
stream->sequence++; /* bump sequence number */
|
||
/* parse mailbox */
|
||
stream->nmsgs = stream->recent = 0;
|
||
if (mtx_ping (stream) && !stream->nmsgs)
|
||
MM_LOG ("Mailbox is empty",(long) NIL);
|
||
if (!LOCAL) return NIL; /* failure if stream died */
|
||
stream->perm_seen = stream->perm_deleted =
|
||
stream->perm_flagged = stream->perm_answered = stream->perm_draft =
|
||
stream->rdonly ? NIL : T;
|
||
stream->perm_user_flags = stream->rdonly ? NIL : 0xffffffff;
|
||
return stream; /* return stream to caller */
|
||
}
|
||
|
||
/* MTX mail close
|
||
* Accepts: MAIL stream
|
||
* close options
|
||
*/
|
||
|
||
void mtx_close (MAILSTREAM *stream,long options)
|
||
{
|
||
if (stream && LOCAL) { /* only if a file is open */
|
||
int silent = stream->silent;
|
||
stream->silent = T; /* note this stream is dying */
|
||
if (options & CL_EXPUNGE) mtx_expunge (stream,NIL,NIL);
|
||
stream->silent = silent; /* restore previous status */
|
||
flock (LOCAL->fd,LOCK_UN); /* unlock local file */
|
||
close (LOCAL->fd); /* close the local file */
|
||
/* free local text buffer */
|
||
if (LOCAL->buf) fs_give ((void **) &LOCAL->buf);
|
||
/* nuke the local data */
|
||
fs_give ((void **) &stream->local);
|
||
stream->dtb = NIL; /* log out the DTB */
|
||
}
|
||
}
|
||
|
||
|
||
/* MTX mail fetch flags
|
||
* Accepts: MAIL stream
|
||
* sequence
|
||
* option flags
|
||
* Sniffs at file to see if some other process changed the flags
|
||
*/
|
||
|
||
void mtx_flags (MAILSTREAM *stream,char *sequence,long flags)
|
||
{
|
||
unsigned long i;
|
||
if (mtx_ping (stream) && /* ping mailbox, get new status for messages */
|
||
((flags & FT_UID) ? mail_uid_sequence (stream,sequence) :
|
||
mail_sequence (stream,sequence)))
|
||
for (i = 1; i <= stream->nmsgs; i++)
|
||
if (mail_elt (stream,i)->sequence) mtx_elt (stream,i);
|
||
}
|
||
|
||
/* MTX mail fetch message header
|
||
* Accepts: MAIL stream
|
||
* message # to fetch
|
||
* pointer to returned header text length
|
||
* option flags
|
||
* Returns: message header in RFC822 format
|
||
*/
|
||
|
||
char *mtx_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *length,
|
||
long flags)
|
||
{
|
||
*length = 0; /* default to empty */
|
||
if (flags & FT_UID) return "";/* UID call "impossible" */
|
||
/* get to header position */
|
||
lseek (LOCAL->fd,mtx_hdrpos (stream,msgno,length),L_SET);
|
||
/* is buffer big enough? */
|
||
if (*length > LOCAL->buflen) {
|
||
fs_give ((void **) &LOCAL->buf);
|
||
LOCAL->buf = (char *) fs_get ((LOCAL->buflen = *length) + 1);
|
||
}
|
||
LOCAL->buf[*length] = '\0'; /* tie off string */
|
||
/* slurp the data */
|
||
read (LOCAL->fd,LOCAL->buf,*length);
|
||
return (char *) LOCAL->buf;
|
||
}
|
||
|
||
/* MTX mail fetch message text (body only)
|
||
* Accepts: MAIL stream
|
||
* message # to fetch
|
||
* pointer to returned header text length
|
||
* option flags
|
||
* Returns: T, always
|
||
*/
|
||
|
||
long mtx_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags)
|
||
{
|
||
FDDATA d;
|
||
unsigned long i,j;
|
||
MESSAGECACHE *elt;
|
||
/* UID call "impossible" */
|
||
if (flags & FT_UID) return NIL;
|
||
elt = mtx_elt (stream,msgno); /* get message status */
|
||
/* if message not seen */
|
||
if (!(flags & FT_PEEK) && !elt->seen) {
|
||
elt->seen = T; /* mark message as seen */
|
||
/* recalculate status */
|
||
mtx_update_status (stream,msgno,NIL);
|
||
MM_FLAGS (stream,msgno);
|
||
}
|
||
/* find header position */
|
||
i = mtx_hdrpos (stream,msgno,&j);
|
||
d.fd = LOCAL->fd; /* set up file descriptor */
|
||
d.pos = i + j;
|
||
d.chunk = LOCAL->buf; /* initial buffer chunk */
|
||
d.chunksize = CHUNKSIZE;
|
||
INIT (bs,fd_string,&d,elt->rfc822_size - j);
|
||
return T; /* success */
|
||
}
|
||
|
||
/* MTX mail modify flags
|
||
* Accepts: MAIL stream
|
||
* sequence
|
||
* flag(s)
|
||
* option flags
|
||
*/
|
||
|
||
void mtx_flag (MAILSTREAM *stream,char *sequence,char *flag,long flags)
|
||
{
|
||
time_t tp[2];
|
||
struct stat sbuf;
|
||
if (!stream->rdonly) { /* make sure the update takes */
|
||
fsync (LOCAL->fd);
|
||
fstat (LOCAL->fd,&sbuf); /* get current write time */
|
||
tp[1] = LOCAL->filetime = sbuf.st_mtime;
|
||
tp[0] = time (0); /* make sure read comes after all that */
|
||
set_utime_from_tp(stream->mailbox,tp);
|
||
}
|
||
}
|
||
|
||
|
||
/* MTX mail per-message modify flags
|
||
* Accepts: MAIL stream
|
||
* message cache element
|
||
*/
|
||
|
||
void mtx_flagmsg (MAILSTREAM *stream,MESSAGECACHE *elt)
|
||
{
|
||
struct stat sbuf;
|
||
/* maybe need to do a checkpoint? */
|
||
if (LOCAL->filetime && !LOCAL->shouldcheck) {
|
||
fstat (LOCAL->fd,&sbuf); /* get current write time */
|
||
if (LOCAL->filetime < sbuf.st_mtime) LOCAL->shouldcheck = T;
|
||
LOCAL->filetime = 0; /* don't do this test for any other messages */
|
||
}
|
||
/* recalculate status */
|
||
mtx_update_status (stream,elt->msgno,NIL);
|
||
}
|
||
|
||
/* MTX mail ping mailbox
|
||
* Accepts: MAIL stream
|
||
* Returns: T if stream still alive, NIL if not
|
||
*/
|
||
|
||
long mtx_ping (MAILSTREAM *stream)
|
||
{
|
||
unsigned long i = 1;
|
||
long r = T;
|
||
int ld;
|
||
char lock[MAILTMPLEN];
|
||
struct stat sbuf;
|
||
if (stream && LOCAL) { /* only if stream already open */
|
||
fstat (LOCAL->fd,&sbuf); /* get current file poop */
|
||
if (LOCAL->filetime && !(LOCAL->mustcheck || LOCAL->shouldcheck) &&
|
||
(LOCAL->filetime < sbuf.st_mtime)) LOCAL->shouldcheck = T;
|
||
/* check for changed message status */
|
||
if (LOCAL->mustcheck || LOCAL->shouldcheck) {
|
||
LOCAL->filetime = sbuf.st_mtime;
|
||
if (LOCAL->shouldcheck) /* babble when we do this unilaterally */
|
||
MM_NOTIFY (stream,"[CHECK] Checking for flag updates",NIL);
|
||
while (i <= stream->nmsgs) mtx_elt (stream,i++);
|
||
LOCAL->mustcheck = LOCAL->shouldcheck = NIL;
|
||
}
|
||
/* get shared parse/append permission */
|
||
if ((sbuf.st_size != LOCAL->filesize) &&
|
||
((ld = lockfd (LOCAL->fd,lock,LOCK_SH)) >= 0)) {
|
||
/* parse resulting mailbox */
|
||
r = (mtx_parse (stream)) ? T : NIL;
|
||
unlockfd (ld,lock); /* release shared parse/append permission */
|
||
}
|
||
if (LOCAL) { /* stream must still be alive */
|
||
/* snarf if this is a read-write inbox */
|
||
if (stream->inbox && !stream->rdonly) {
|
||
mtx_snarf (stream);
|
||
fstat (LOCAL->fd,&sbuf);/* see if file changed now */
|
||
if ((sbuf.st_size != LOCAL->filesize) &&
|
||
((ld = lockfd (LOCAL->fd,lock,LOCK_SH)) >= 0)) {
|
||
/* parse resulting mailbox */
|
||
r = (mtx_parse (stream)) ? T : NIL;
|
||
unlockfd (ld,lock); /* release shared parse/append permission */
|
||
}
|
||
}
|
||
}
|
||
}
|
||
return r; /* return result of the parse */
|
||
}
|
||
|
||
|
||
/* MTX mail check mailbox (reparses status too)
|
||
* Accepts: MAIL stream
|
||
*/
|
||
|
||
void mtx_check (MAILSTREAM *stream)
|
||
{
|
||
/* mark that a check is desired */
|
||
if (LOCAL) LOCAL->mustcheck = T;
|
||
if (mtx_ping (stream)) MM_LOG ("Check completed",(long) NIL);
|
||
}
|
||
|
||
/* MTX mail snarf messages from system inbox
|
||
* Accepts: MAIL stream
|
||
*/
|
||
|
||
void mtx_snarf (MAILSTREAM *stream)
|
||
{
|
||
unsigned long i = 0;
|
||
unsigned long j,r,hdrlen,txtlen;
|
||
struct stat sbuf;
|
||
char *hdr,*txt,lock[MAILTMPLEN],tmp[MAILTMPLEN];
|
||
MESSAGECACHE *elt;
|
||
MAILSTREAM *sysibx = NIL;
|
||
int ld;
|
||
/* give up if can't get exclusive permission */
|
||
if ((time (0) >= (LOCAL->lastsnarf +
|
||
(long) mail_parameters (NIL,GET_SNARFINTERVAL,NIL))) &&
|
||
strcmp (sysinbox (),stream->mailbox) &&
|
||
((ld = lockfd (LOCAL->fd,lock,LOCK_EX)) >= 0)) {
|
||
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) {
|
||
/* calculate header line */
|
||
mail_date (LOCAL->buf,elt = mail_elt (sysibx,i));
|
||
sprintf (LOCAL->buf + strlen (LOCAL->buf),
|
||
",%lu;0000000000%02o\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_flag (sysibx,tmp,"\\Deleted",ST_SET);
|
||
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 */
|
||
unlockfd (ld,lock); /* release exclusive parse/append permission */
|
||
LOCAL->lastsnarf = time (0);/* note time of last snarf */
|
||
}
|
||
}
|
||
|
||
/* MTX mail expunge mailbox
|
||
* Accepts: MAIL stream
|
||
* sequence to expunge if non-NIL
|
||
* expunge options
|
||
* Returns: T, always
|
||
*/
|
||
|
||
long mtx_expunge (MAILSTREAM *stream,char *sequence,long options)
|
||
{
|
||
long ret;
|
||
time_t tp[2];
|
||
struct stat sbuf;
|
||
off_t pos = 0;
|
||
int ld;
|
||
unsigned long i = 1;
|
||
unsigned long j,k,m,recent;
|
||
unsigned long n = 0;
|
||
unsigned long delta = 0;
|
||
char lock[MAILTMPLEN];
|
||
MESSAGECACHE *elt;
|
||
blocknotify_t bn = (blocknotify_t) mail_parameters (NIL,GET_BLOCKNOTIFY,NIL);
|
||
if (!(ret = (sequence ? ((options & EX_UID) ?
|
||
mail_uid_sequence (stream,sequence) :
|
||
mail_sequence (stream,sequence)) : LONGT) &&
|
||
mtx_ping (stream))); /* parse sequence if given, ping stream */
|
||
else if (stream->rdonly) MM_LOG ("Expunge ignored on readonly mailbox",WARN);
|
||
else {
|
||
if (LOCAL->filetime && !LOCAL->shouldcheck) {
|
||
fstat (LOCAL->fd,&sbuf); /* get current write time */
|
||
if (LOCAL->filetime < sbuf.st_mtime) LOCAL->shouldcheck = T;
|
||
}
|
||
/* 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 exclusive parse/append permission */
|
||
if ((ld = lockfd (LOCAL->fd,lock,LOCK_EX)) < 0)
|
||
MM_LOG ("Unable to lock expunge mailbox",ERROR);
|
||
/* make sure see any newly-arrived messages */
|
||
else if (!mtx_parse (stream));
|
||
/* get exclusive access */
|
||
else if (flock (LOCAL->fd,LOCK_EX|LOCK_NB)) {
|
||
(*bn) (BLOCK_FILELOCK,NIL);
|
||
flock (LOCAL->fd,LOCK_SH);/* recover previous lock */
|
||
(*bn) (BLOCK_NONE,NIL);
|
||
MM_LOG ("Can't expunge because mailbox is in use by another process",
|
||
ERROR);
|
||
unlockfd (ld,lock); /* release exclusive parse/append permission */
|
||
}
|
||
|
||
else {
|
||
MM_CRITICAL (stream); /* go critical */
|
||
recent = stream->recent; /* get recent now that pinged and locked */
|
||
/* for each message */
|
||
while (i <= stream->nmsgs) {
|
||
/* get cache element */
|
||
elt = mtx_elt (stream,i);
|
||
/* number of bytes to smash or preserve */
|
||
k = elt->private.special.text.size + elt->rfc822_size;
|
||
/* if need to expunge this message */
|
||
if (elt->deleted && (sequence ? elt->sequence : T)) {
|
||
/* if recent, note one less recent message */
|
||
if (elt->recent) --recent;
|
||
delta += k; /* number of bytes to delete */
|
||
/* notify upper levels */
|
||
mail_expunged (stream,i);
|
||
n++; /* count up one more expunged message */
|
||
}
|
||
else if (i++ && delta) {/* preserved message */
|
||
/* first byte to preserve */
|
||
j = elt->private.special.offset;
|
||
do { /* read from source position */
|
||
m = min (k,LOCAL->buflen);
|
||
lseek (LOCAL->fd,j,L_SET);
|
||
read (LOCAL->fd,LOCAL->buf,m);
|
||
pos = j - delta; /* write to destination position */
|
||
lseek (LOCAL->fd,pos,L_SET);
|
||
while (T) {
|
||
lseek (LOCAL->fd,pos,L_SET);
|
||
if (write (LOCAL->fd,LOCAL->buf,m) > 0) break;
|
||
MM_NOTIFY (stream,strerror (errno),WARN);
|
||
MM_DISKERROR (stream,errno,T);
|
||
}
|
||
pos += m; /* new position */
|
||
j += m; /* next chunk, perhaps */
|
||
} while (k -= m); /* until done */
|
||
/* note the new address of this text */
|
||
elt->private.special.offset -= delta;
|
||
}
|
||
/* preserved but no deleted messages */
|
||
else pos = elt->private.special.offset + k;
|
||
}
|
||
if (n) { /* truncate file after last message */
|
||
if (pos != (LOCAL->filesize -= delta)) {
|
||
sprintf (LOCAL->buf,
|
||
"Calculated size mismatch %lu != %lu, delta = %lu",
|
||
(unsigned long) pos,(unsigned long) LOCAL->filesize,delta);
|
||
MM_LOG (LOCAL->buf,WARN);
|
||
LOCAL->filesize = pos;/* fix it then */
|
||
}
|
||
ftruncate (LOCAL->fd,LOCAL->filesize);
|
||
sprintf (LOCAL->buf,"Expunged %lu messages",n);
|
||
/* output the news */
|
||
MM_LOG (LOCAL->buf,(long) NIL);
|
||
}
|
||
else MM_LOG ("No messages deleted, so no update needed",(long) NIL);
|
||
fsync (LOCAL->fd); /* force disk update */
|
||
fstat (LOCAL->fd,&sbuf); /* get new write time */
|
||
tp[1] = LOCAL->filetime = sbuf.st_mtime;
|
||
tp[0] = time (0); /* reset atime to now */
|
||
set_utime_from_tp(stream->mailbox,tp);
|
||
MM_NOCRITICAL (stream); /* release critical */
|
||
/* notify upper level of new mailbox size */
|
||
mail_exists (stream,stream->nmsgs);
|
||
mail_recent (stream,recent);
|
||
(*bn) (BLOCK_FILELOCK,NIL);
|
||
flock (LOCAL->fd,LOCK_SH);/* allow sharers again */
|
||
(*bn) (BLOCK_NONE,NIL);
|
||
unlockfd (ld,lock); /* release exclusive parse/append permission */
|
||
}
|
||
}
|
||
return ret;
|
||
}
|
||
|
||
/* MTX mail copy message(s)
|
||
* Accepts: MAIL stream
|
||
* sequence
|
||
* destination mailbox
|
||
* copy options
|
||
* Returns: T if success, NIL if failed
|
||
*/
|
||
|
||
long mtx_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options)
|
||
{
|
||
struct stat sbuf;
|
||
time_t tp[2];
|
||
MESSAGECACHE *elt;
|
||
unsigned long i,j,k;
|
||
long ret = LONGT;
|
||
int fd,ld;
|
||
char file[MAILTMPLEN],lock[MAILTMPLEN];
|
||
mailproxycopy_t pc =
|
||
(mailproxycopy_t) mail_parameters (stream,GET_MAILPROXYCOPY,NIL);
|
||
/* make sure valid mailbox */
|
||
if (!mtx_isvalid (mailbox,LOCAL->buf)) switch (errno) {
|
||
case ENOENT: /* no such file? */
|
||
MM_NOTIFY (stream,"[TRYCREATE] Must create mailbox before copy",NIL);
|
||
return NIL;
|
||
case 0: /* merely empty file? */
|
||
break;
|
||
case EACCES: /* file protected */
|
||
sprintf (LOCAL->buf,"Can't access destination: %.80s",mailbox);
|
||
MM_LOG (LOCAL->buf,ERROR);
|
||
return NIL;
|
||
case EINVAL:
|
||
if (pc) return (*pc) (stream,sequence,mailbox,options);
|
||
sprintf (LOCAL->buf,"Invalid MTX-format mailbox name: %.80s",mailbox);
|
||
MM_LOG (LOCAL->buf,ERROR);
|
||
return NIL;
|
||
default:
|
||
if (pc) return (*pc) (stream,sequence,mailbox,options);
|
||
sprintf (LOCAL->buf,"Not a MTX-format mailbox: %.80s",mailbox);
|
||
MM_LOG (LOCAL->buf,ERROR);
|
||
return NIL;
|
||
}
|
||
if (!((options & CP_UID) ? mail_uid_sequence (stream,sequence) :
|
||
mail_sequence (stream,sequence))) return NIL;
|
||
/* got file? */
|
||
if ((fd = open (mtx_file (file,mailbox),O_RDWR,NIL)) < 0) {
|
||
sprintf (LOCAL->buf,"Unable to open copy mailbox: %s",strerror (errno));
|
||
MM_LOG (LOCAL->buf,ERROR);
|
||
return NIL;
|
||
}
|
||
MM_CRITICAL (stream); /* go critical */
|
||
/* get exclusive parse/append permission */
|
||
if (flock (fd,LOCK_SH) || ((ld = lockfd (fd,lock,LOCK_EX)) < 0)) {
|
||
MM_LOG ("Unable to lock copy mailbox",ERROR);
|
||
MM_NOCRITICAL (stream);
|
||
return NIL;
|
||
}
|
||
fstat (fd,&sbuf); /* get current file size */
|
||
lseek (fd,sbuf.st_size,L_SET);/* move to end of file */
|
||
|
||
/* for each requested message */
|
||
for (i = 1; ret && (i <= stream->nmsgs); i++)
|
||
if ((elt = mail_elt (stream,i))->sequence) {
|
||
lseek (LOCAL->fd,elt->private.special.offset,L_SET);
|
||
/* number of bytes to copy */
|
||
k = elt->private.special.text.size + elt->rfc822_size;
|
||
do { /* read from source position */
|
||
j = min (k,LOCAL->buflen);
|
||
read (LOCAL->fd,LOCAL->buf,j);
|
||
if (write (fd,LOCAL->buf,j) < 0) ret = NIL;
|
||
} while (ret && (k -= j));/* until done */
|
||
}
|
||
/* make sure all the updates take */
|
||
if (!(ret && (ret = !fsync (fd)))) {
|
||
sprintf (LOCAL->buf,"Unable to write message: %s",strerror (errno));
|
||
MM_LOG (LOCAL->buf,ERROR);
|
||
ftruncate (fd,sbuf.st_size);
|
||
}
|
||
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 */
|
||
unlockfd (ld,lock); /* release exclusive parse/append permission */
|
||
MM_NOCRITICAL (stream); /* release critical */
|
||
/* delete all requested messages */
|
||
if (ret && (options & CP_MOVE)) {
|
||
for (i = 1; i <= stream->nmsgs; i++)
|
||
if ((elt = mtx_elt (stream,i))->sequence) {
|
||
elt->deleted = T; /* mark message deleted */
|
||
/* recalculate status */
|
||
mtx_update_status (stream,i,NIL);
|
||
}
|
||
if (!stream->rdonly) { /* make sure the update takes */
|
||
fsync (LOCAL->fd);
|
||
fstat (LOCAL->fd,&sbuf); /* get current write time */
|
||
tp[1] = LOCAL->filetime = sbuf.st_mtime;
|
||
tp[0] = time (0); /* make sure atime remains greater */
|
||
set_utime_from_tp(stream->mailbox,tp);
|
||
}
|
||
}
|
||
if (ret && mail_parameters (NIL,GET_COPYUID,NIL))
|
||
MM_LOG ("Can not return meaningful COPYUID with this mailbox format",WARN);
|
||
return ret;
|
||
}
|
||
|
||
/* MTX mail append message from stringstruct
|
||
* Accepts: MAIL stream
|
||
* destination mailbox
|
||
* append callback
|
||
* data for callback
|
||
* Returns: T if append successful, else NIL
|
||
*/
|
||
|
||
long mtx_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data)
|
||
{
|
||
struct stat sbuf;
|
||
int fd,ld,c;
|
||
char *flags,*date,tmp[MAILTMPLEN],file[MAILTMPLEN],lock[MAILTMPLEN];
|
||
time_t tp[2];
|
||
FILE *df;
|
||
MESSAGECACHE elt;
|
||
long f;
|
||
unsigned long i,uf;
|
||
STRING *message;
|
||
long ret = LONGT;
|
||
/* default stream to prototype */
|
||
if (!stream) stream = user_flags (&mtxproto);
|
||
/* make sure valid mailbox */
|
||
if (!mtx_isvalid (mailbox,tmp)) switch (errno) {
|
||
case ENOENT: /* no such file? */
|
||
if (!compare_cstring (mailbox,"INBOX")) dummy_create (NIL,"INBOX.MTX");
|
||
else {
|
||
MM_NOTIFY (stream,"[TRYCREATE] Must create mailbox before append",NIL);
|
||
return NIL;
|
||
}
|
||
/* falls through */
|
||
case 0: /* merely empty file? */
|
||
break;
|
||
case EACCES: /* file protected */
|
||
sprintf (tmp,"Can't access destination: %.80s",mailbox);
|
||
MM_LOG (tmp,ERROR);
|
||
return NIL;
|
||
case EINVAL:
|
||
sprintf (tmp,"Invalid MTX-format mailbox name: %.80s",mailbox);
|
||
MM_LOG (tmp,ERROR);
|
||
return NIL;
|
||
default:
|
||
sprintf (tmp,"Not a MTX-format mailbox: %.80s",mailbox);
|
||
MM_LOG (tmp,ERROR);
|
||
return NIL;
|
||
}
|
||
/* get first message */
|
||
if (!MM_APPEND (af) (stream,data,&flags,&date,&message)) return NIL;
|
||
|
||
/* open destination mailbox */
|
||
if (((fd = open (mtx_file (file,mailbox),O_WRONLY|O_APPEND,NIL)) < 0) ||
|
||
!(df = fdopen (fd,"ab"))) {
|
||
sprintf (tmp,"Can't open append mailbox: %s",strerror (errno));
|
||
MM_LOG (tmp,ERROR);
|
||
return NIL;
|
||
}
|
||
/* get parse/append permission */
|
||
if (flock (fd,LOCK_SH) || ((ld = lockfd (fd,lock,LOCK_EX)) < 0)) {
|
||
MM_LOG ("Unable to lock append mailbox",ERROR);
|
||
close (fd);
|
||
return NIL;
|
||
}
|
||
MM_CRITICAL (stream); /* go critical */
|
||
fstat (fd,&sbuf); /* get current file size */
|
||
errno = 0;
|
||
do { /* parse flags */
|
||
if (!SIZE (message)) { /* guard against zero-length */
|
||
MM_LOG ("Append of zero-length message",ERROR);
|
||
ret = NIL;
|
||
break;
|
||
}
|
||
f = mail_parse_flags (stream,flags,&i);
|
||
/* reverse bits (dontcha wish we had CIRC?) */
|
||
for (uf = 0; i; uf |= 1 << (29 - find_rightmost_bit (&i)));
|
||
if (date) { /* parse date if given */
|
||
if (!mail_parse_date (&elt,date)) {
|
||
sprintf (tmp,"Bad date in append: %.80s",date);
|
||
MM_LOG (tmp,ERROR);
|
||
ret = NIL; /* mark failure */
|
||
break;
|
||
}
|
||
mail_date (tmp,&elt); /* write preseved date */
|
||
}
|
||
else internal_date (tmp); /* get current date in IMAP format */
|
||
/* write header */
|
||
if (fprintf (df,"%s,%lu;%010lo%02lo\015\012",tmp,i = SIZE (message),uf,
|
||
(unsigned long) f) < 0) ret = NIL;
|
||
else { /* write message */
|
||
if (i) do c = 0xff & SNX (message);
|
||
while ((putc (c,df) != EOF) && --i);
|
||
/* get next message */
|
||
if (i || !MM_APPEND (af) (stream,data,&flags,&date,&message)) ret = NIL;
|
||
}
|
||
} while (ret && message);
|
||
/* if error... */
|
||
if (!ret || (fflush (df) == EOF)) {
|
||
ftruncate (fd,sbuf.st_size);/* revert file */
|
||
close (fd); /* make sure fclose() doesn't corrupt us */
|
||
if (errno) {
|
||
sprintf (tmp,"Message append failed: %s",strerror (errno));
|
||
MM_LOG (tmp,ERROR);
|
||
}
|
||
ret = NIL;
|
||
}
|
||
if (ret) 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 */
|
||
fclose (df); /* close the file */
|
||
unlockfd (ld,lock); /* release exclusive parse/append permission */
|
||
MM_NOCRITICAL (stream); /* release critical */
|
||
if (ret && mail_parameters (NIL,GET_APPENDUID,NIL))
|
||
MM_LOG ("Can not return meaningful APPENDUID with this mailbox format",
|
||
WARN);
|
||
return ret;
|
||
}
|
||
|
||
/* Internal routines */
|
||
|
||
|
||
/* MTX mail generate file string
|
||
* Accepts: temporary buffer to write into
|
||
* mailbox name string
|
||
* Returns: local file string or NIL if failure
|
||
*/
|
||
|
||
char *mtx_file (char *dst,char *name)
|
||
{
|
||
char tmp[MAILTMPLEN];
|
||
char *s = mailboxfile (dst,name);
|
||
/* return our standard inbox */
|
||
return (s && !*s) ? mailboxfile (dst,mtx_isvalid ("~/INBOX",tmp) ?
|
||
"~/INBOX" : "INBOX.MTX") : s;
|
||
}
|
||
|
||
/* MTX mail parse mailbox
|
||
* Accepts: MAIL stream
|
||
* Returns: T if parse OK
|
||
* NIL if failure, stream aborted
|
||
*/
|
||
|
||
long mtx_parse (MAILSTREAM *stream)
|
||
{
|
||
struct stat sbuf;
|
||
MESSAGECACHE *elt = NIL;
|
||
unsigned char c,*s,*t,*x;
|
||
char tmp[MAILTMPLEN];
|
||
unsigned long i,j;
|
||
long curpos = LOCAL->filesize;
|
||
long nmsgs = stream->nmsgs;
|
||
long recent = stream->recent;
|
||
short added = NIL;
|
||
short silent = stream->silent;
|
||
fstat (LOCAL->fd,&sbuf); /* get status */
|
||
if (sbuf.st_size < curpos) { /* sanity check */
|
||
sprintf (tmp,"Mailbox shrank from %lu to %lu!",
|
||
(unsigned long) curpos,(unsigned long) sbuf.st_size);
|
||
MM_LOG (tmp,ERROR);
|
||
mtx_close (stream,NIL);
|
||
return NIL;
|
||
}
|
||
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);
|
||
mtx_close (stream,NIL);
|
||
return NIL;
|
||
}
|
||
LOCAL->buf[i] = '\0'; /* tie off buffer just in case */
|
||
if (!((s = strchr (LOCAL->buf,'\015')) && (s[1] == '\012'))) {
|
||
sprintf (tmp,"Unable to find CRLF at %lu in %lu bytes, text: %s",
|
||
(unsigned long) curpos,i,(char *) LOCAL->buf);
|
||
MM_LOG (tmp,ERROR);
|
||
mtx_close (stream,NIL);
|
||
return NIL;
|
||
}
|
||
*s = '\0'; /* tie off header line */
|
||
i = (s + 2) - LOCAL->buf; /* note start of text offset */
|
||
if (!((s = strchr (LOCAL->buf,',')) && (t = strchr (s+1,';')))) {
|
||
sprintf (tmp,"Unable to parse internal header at %lu: %s",
|
||
(unsigned long) curpos,(char *) LOCAL->buf);
|
||
MM_LOG (tmp,ERROR);
|
||
mtx_close (stream,NIL);
|
||
return NIL;
|
||
}
|
||
*s++ = '\0'; *t++ = '\0'; /* tie off fields */
|
||
|
||
added = T; /* note that a new message was added */
|
||
/* swell the cache */
|
||
mail_exists (stream,++nmsgs);
|
||
/* instantiate an elt for this message */
|
||
(elt = mail_elt (stream,nmsgs))->valid = T;
|
||
elt->private.uid = ++stream->uid_last;
|
||
/* note file offset of header */
|
||
elt->private.special.offset = curpos;
|
||
/* in case error */
|
||
elt->private.special.text.size = 0;
|
||
/* header size not known yet */
|
||
elt->private.msg.header.text.size = 0;
|
||
x = s; /* parse the header components */
|
||
if (mail_parse_date (elt,LOCAL->buf) &&
|
||
(elt->rfc822_size = strtoul (s,(char **) &s,10)) && (!(s && *s)) &&
|
||
isdigit (t[0]) && isdigit (t[1]) && isdigit (t[2]) &&
|
||
isdigit (t[3]) && isdigit (t[4]) && isdigit (t[5]) &&
|
||
isdigit (t[6]) && isdigit (t[7]) && isdigit (t[8]) &&
|
||
isdigit (t[9]) && isdigit (t[10]) && isdigit (t[11]) && !t[12])
|
||
elt->private.special.text.size = i;
|
||
else { /* oops */
|
||
sprintf (tmp,"Unable to parse internal header elements at %ld: %s,%s;%s",
|
||
curpos,(char *) LOCAL->buf,(char *) x,(char *) t);
|
||
MM_LOG (tmp,ERROR);
|
||
mtx_close (stream,NIL);
|
||
return NIL;
|
||
}
|
||
/* make sure didn't run off end of file */
|
||
if ((curpos += (elt->rfc822_size + i)) > sbuf.st_size) {
|
||
sprintf (tmp,"Last message (at %lu) runs past end of file (%lu > %lu)",
|
||
elt->private.special.offset,(unsigned long) curpos,
|
||
(unsigned long) sbuf.st_size);
|
||
MM_LOG (tmp,ERROR);
|
||
mtx_close (stream,NIL);
|
||
return NIL;
|
||
}
|
||
c = t[10]; /* remember first system flags byte */
|
||
t[10] = '\0'; /* tie off flags */
|
||
j = strtoul (t,NIL,8); /* get user flags value */
|
||
t[10] = c; /* restore first system flags byte */
|
||
/* set up all valid user flags (reversed!) */
|
||
while (j) if (((i = 29 - find_rightmost_bit (&j)) < NUSERFLAGS) &&
|
||
stream->user_flags[i]) elt->user_flags |= 1 << i;
|
||
/* calculate system flags */
|
||
if ((j = ((t[10]-'0') * 8) + t[11]-'0') & fSEEN) elt->seen = T;
|
||
if (j & fDELETED) elt->deleted = T;
|
||
if (j & fFLAGGED) elt->flagged = T;
|
||
if (j & fANSWERED) elt->answered = T;
|
||
if (j & fDRAFT) elt->draft = T;
|
||
if (!(j & fOLD)) { /* newly arrived message? */
|
||
elt->recent = T;
|
||
recent++; /* count up a new recent message */
|
||
/* mark it as old */
|
||
mtx_update_status (stream,nmsgs,NIL);
|
||
}
|
||
}
|
||
fsync (LOCAL->fd); /* make sure all the fOLD flags take */
|
||
/* update parsed file size and time */
|
||
LOCAL->filesize = sbuf.st_size;
|
||
fstat (LOCAL->fd,&sbuf); /* get status again to ensure time is right */
|
||
LOCAL->filetime = sbuf.st_mtime;
|
||
if (added && !stream->rdonly){/* make sure atime updated */
|
||
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 */
|
||
}
|
||
|
||
/* MTX get cache element with status updating from file
|
||
* Accepts: MAIL stream
|
||
* message number
|
||
* Returns: cache element
|
||
*/
|
||
|
||
MESSAGECACHE *mtx_elt (MAILSTREAM *stream,unsigned long msgno)
|
||
{
|
||
MESSAGECACHE *elt = mail_elt (stream,msgno);
|
||
struct { /* old flags */
|
||
unsigned int seen : 1;
|
||
unsigned int deleted : 1;
|
||
unsigned int flagged : 1;
|
||
unsigned int answered : 1;
|
||
unsigned int draft : 1;
|
||
unsigned long user_flags;
|
||
} old;
|
||
old.seen = elt->seen; old.deleted = elt->deleted; old.flagged = elt->flagged;
|
||
old.answered = elt->answered; old.draft = elt->draft;
|
||
old.user_flags = elt->user_flags;
|
||
mtx_read_flags (stream,elt);
|
||
if ((old.seen != elt->seen) || (old.deleted != elt->deleted) ||
|
||
(old.flagged != elt->flagged) || (old.answered != elt->answered) ||
|
||
(old.draft != elt->draft) || (old.user_flags != elt->user_flags))
|
||
MM_FLAGS (stream,msgno); /* let top level know */
|
||
return elt;
|
||
}
|
||
|
||
/* MTX read flags from file
|
||
* Accepts: MAIL stream
|
||
* Returns: cache element
|
||
*/
|
||
|
||
void mtx_read_flags (MAILSTREAM *stream,MESSAGECACHE *elt)
|
||
{
|
||
unsigned long i,j;
|
||
/* noop if readonly and have valid flags */
|
||
if (stream->rdonly && elt->valid) return;
|
||
/* set the seek pointer */
|
||
lseek (LOCAL->fd,(off_t) elt->private.special.offset +
|
||
elt->private.special.text.size - 14,L_SET);
|
||
/* read the new flags */
|
||
if (read (LOCAL->fd,LOCAL->buf,12) < 0) {
|
||
sprintf (LOCAL->buf,"Unable to read new status: %s",strerror (errno));
|
||
fatal (LOCAL->buf);
|
||
}
|
||
/* calculate system flags */
|
||
i = (((LOCAL->buf[10]-'0') * 8) + LOCAL->buf[11]-'0');
|
||
elt->seen = i & fSEEN ? T : NIL; elt->deleted = i & fDELETED ? T : NIL;
|
||
elt->flagged = i & fFLAGGED ? T : NIL;
|
||
elt->answered = i & fANSWERED ? T : NIL; elt->draft = i & fDRAFT ? T : NIL;
|
||
LOCAL->buf[10] = '\0'; /* tie off flags */
|
||
j = strtoul(LOCAL->buf,NIL,8);/* get user flags value */
|
||
/* set up all valid user flags (reversed!) */
|
||
while (j) if (((i = 29 - find_rightmost_bit (&j)) < NUSERFLAGS) &&
|
||
stream->user_flags[i]) elt->user_flags |= 1 << i;
|
||
elt->valid = T; /* have valid flags now */
|
||
}
|
||
|
||
/* MTX update status string
|
||
* Accepts: MAIL stream
|
||
* message number
|
||
* flag saying whether or not to sync
|
||
*/
|
||
|
||
void mtx_update_status (MAILSTREAM *stream,unsigned long msgno,long syncflag)
|
||
{
|
||
time_t tp[2];
|
||
struct stat sbuf;
|
||
MESSAGECACHE *elt = mail_elt (stream,msgno);
|
||
unsigned long j,k = 0;
|
||
/* readonly */
|
||
if (stream->rdonly || !elt->valid) mtx_read_flags (stream,elt);
|
||
else { /* readwrite */
|
||
j = elt->user_flags; /* get user flags */
|
||
/* reverse bits (dontcha wish we had CIRC?) */
|
||
while (j) k |= 1 << (29 - find_rightmost_bit (&j));
|
||
/* print new flag string */
|
||
sprintf (LOCAL->buf,"%010lo%02o",k,(unsigned)
|
||
(fOLD + (fSEEN * elt->seen) + (fDELETED * elt->deleted) +
|
||
(fFLAGGED * elt->flagged) + (fANSWERED * elt->answered) +
|
||
(fDRAFT * elt->draft)));
|
||
/* get to that place in the file */
|
||
lseek (LOCAL->fd,(off_t) elt->private.special.offset +
|
||
elt->private.special.text.size - 14,L_SET);
|
||
/* write new flags */
|
||
write (LOCAL->fd,LOCAL->buf,12);
|
||
if (syncflag) { /* sync if requested */
|
||
fsync (LOCAL->fd);
|
||
fstat (LOCAL->fd,&sbuf); /* get new write time */
|
||
tp[1] = LOCAL->filetime = sbuf.st_mtime;
|
||
tp[0] = time (0); /* make sure read is later */
|
||
set_utime_from_tp(stream->mailbox,tp);
|
||
}
|
||
}
|
||
}
|
||
|
||
/* MTX locate header for a message
|
||
* Accepts: MAIL stream
|
||
* message number
|
||
* pointer to returned header size
|
||
* Returns: position of header in file
|
||
*/
|
||
|
||
unsigned long mtx_hdrpos (MAILSTREAM *stream,unsigned long msgno,
|
||
unsigned long *size)
|
||
{
|
||
unsigned long siz;
|
||
long i = 0;
|
||
int q = 0;
|
||
char *s,tmp[MAILTMPLEN];
|
||
MESSAGECACHE *elt = mtx_elt (stream,msgno);
|
||
unsigned long ret = elt->private.special.offset +
|
||
elt->private.special.text.size;
|
||
/* is header size known? */
|
||
if (!(*size = elt->private.msg.header.text.size)) {
|
||
lseek (LOCAL->fd,ret,L_SET);/* get to header position */
|
||
/* search message for CRLF CRLF */
|
||
for (siz = 1,s = tmp; siz <= elt->rfc822_size; siz++) {
|
||
/* read another buffer as necessary */
|
||
if ((--i <= 0) && /* buffer empty? */
|
||
(read (LOCAL->fd,s = tmp,
|
||
i = min (elt->rfc822_size - siz,(long) MAILTMPLEN)) < 0))
|
||
return ret; /* I/O error? */
|
||
switch (q) { /* sniff at buffer */
|
||
case 0: /* first character */
|
||
q = (*s++ == '\015') ? 1 : 0;
|
||
break;
|
||
case 1: /* second character */
|
||
q = (*s++ == '\012') ? 2 : 0;
|
||
break;
|
||
case 2: /* third character */
|
||
q = (*s++ == '\015') ? 3 : 0;
|
||
break;
|
||
case 3: /* fourth character */
|
||
if (*s++ == '\012') { /* have the sequence? */
|
||
/* yes, note for later */
|
||
elt->private.msg.header.text.size = *size = siz;
|
||
return ret;
|
||
}
|
||
q = 0; /* lost... */
|
||
break;
|
||
}
|
||
}
|
||
/* header consumes entire message */
|
||
elt->private.msg.header.text.size = *size = elt->rfc822_size;
|
||
}
|
||
return ret;
|
||
}
|