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/* ========================================================================
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* Copyright 1988-2006 University of Washington
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* ========================================================================
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* Program: Berkeley mail routines
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* Author: Mark Crispin
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* Networks and Distributed Computing
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* Computing & Communications
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* University of Washington
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* Administration Building, AG-44
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* Internet: MRC@CAC.Washington.EDU
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* Last Edited: 30 August 2006
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* This file is dedicated with affection to those Merry Marvels of Musical
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* -> The Incomparable Leland Stanford Junior University Marching Band <-
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* who entertain, awaken, and outrage Stanford fans in the fact of repeated
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* losing seasons and shattered Rose Bowl dreams [Cardinal just don't have
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/* Berkeley I/O stream local data */
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typedef struct bezerk_local {
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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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char *buf; /* temporary buffer */
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/* Convenient access to local data */
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#define LOCAL ((BEZERKLOCAL *) stream->local)
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/* Function prototypes */
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DRIVER *bezerk_valid (char *name);
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long bezerk_isvalid (char *name,char *tmp);
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int bezerk_valid_line (char *s,char **rx,int *rzn);
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void *bezerk_parameters (long function,void *value);
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void bezerk_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents);
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void bezerk_list (MAILSTREAM *stream,char *ref,char *pat);
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void bezerk_lsub (MAILSTREAM *stream,char *ref,char *pat);
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long bezerk_create (MAILSTREAM *stream,char *mailbox);
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long bezerk_delete (MAILSTREAM *stream,char *mailbox);
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long bezerk_rename (MAILSTREAM *stream,char *old,char *newname);
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MAILSTREAM *bezerk_open (MAILSTREAM *stream);
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void bezerk_close (MAILSTREAM *stream,long options);
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char *bezerk_header (MAILSTREAM *stream,unsigned long msgno,
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unsigned long *length,long flags);
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long bezerk_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,
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long bezerk_ping (MAILSTREAM *stream);
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void bezerk_check (MAILSTREAM *stream);
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long bezerk_expunge (MAILSTREAM *stream,char *sequence,long options);
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long bezerk_copy (MAILSTREAM *stream,char *sequence,char *mailbox,
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long bezerk_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data);
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int bezerk_append_msg (MAILSTREAM *stream,FILE *sf,char *flags,char *date,
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void bezerk_gc (MAILSTREAM *stream,long gcflags);
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char *bezerk_file (char *dst,char *name);
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long bezerk_badname (char *tmp,char *s);
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long bezerk_parse (MAILSTREAM *stream);
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unsigned long bezerk_hdrpos (MAILSTREAM *stream,unsigned long msgno,
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/* Berkeley mail routines */
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/* Driver dispatch used by MAIL */
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DRIVER bezerkdriver = {
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"bezerk", /* driver name */
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DR_LOCAL|DR_MAIL|DR_LOWMEM|DR_CRLF|DR_NOSTICKY,
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(DRIVER *) NIL, /* next driver */
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bezerk_valid, /* mailbox is valid for us */
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bezerk_parameters, /* manipulate parameters */
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bezerk_scan, /* scan mailboxes */
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bezerk_list, /* list mailboxes */
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bezerk_lsub, /* list subscribed mailboxes */
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NIL, /* subscribe to mailbox */
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NIL, /* unsubscribe from mailbox */
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bezerk_create, /* create mailbox */
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bezerk_delete, /* delete mailbox */
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bezerk_rename, /* rename mailbox */
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mail_status_default, /* status of mailbox */
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bezerk_open, /* open mailbox */
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bezerk_close, /* close mailbox */
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NIL, /* fetch message "fast" attributes */
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NIL, /* fetch message flags */
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NIL, /* fetch overview */
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NIL, /* fetch message envelopes */
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bezerk_header, /* fetch message header */
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bezerk_text, /* fetch message text */
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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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NIL, /* modify flags */
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NIL, /* 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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bezerk_ping, /* ping mailbox to see if still alive */
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bezerk_check, /* check for new messages */
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bezerk_expunge, /* expunge deleted messages */
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bezerk_copy, /* copy messages to another mailbox */
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bezerk_append, /* append string message to mailbox */
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NIL /* garbage collect stream */
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/* prototype stream */
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MAILSTREAM bezerkproto = {&bezerkdriver};
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/* Berkeley mail validate mailbox
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* Accepts: mailbox name
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* Returns: our driver if name is valid, NIL otherwise
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DRIVER *bezerk_valid (char *name)
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char tmp[MAILTMPLEN];
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return bezerk_isvalid (name,tmp) ? &bezerkdriver : (DRIVER *) NIL;
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/* Berkeley 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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long bezerk_isvalid (char *name,char *tmp)
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errno = EINVAL; /* assume invalid argument */
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/* if file, get its status */
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if ((*name != '{') && mailboxfile (tmp,name) && !stat (tmp,&sbuf)) {
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if (!sbuf.st_size)errno = 0;/* empty file */
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else if ((fd = open (tmp,O_BINARY|O_RDONLY,NIL)) >= 0) {
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memset (tmp,'\0',MAILTMPLEN);
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errno = -1; /* in case bezerk_valid_line fails */
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if (read (fd,tmp,MAILTMPLEN-1) >= 0)
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ret = bezerk_valid_line (tmp,NIL,NIL);
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close (fd); /* close the file */
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/* in case INBOX but not bezerk format */
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else if ((errno == ENOENT) && ((name[0] == 'I') || (name[0] == 'i')) &&
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((name[1] == 'N') || (name[1] == 'n')) &&
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((name[2] == 'B') || (name[2] == 'b')) &&
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((name[3] == 'O') || (name[3] == 'o')) &&
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((name[4] == 'X') || (name[4] == 'x')) && !name[5]) errno = -1;
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return ret; /* return what we should */
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* Accepts: pointer to candidate string to validate as a From header
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* return pointer to end of date/time field
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* return pointer to offset from t of time (hours of ``mmm dd hh:mm'')
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* return pointer to offset from t of time zone (if non-zero)
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* Returns: t,ti,zn set if valid From string, else ti is NIL
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int bezerk_valid_line (char *s,char **rx,int *rzn)
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/* line must begin with "From " */
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if ((*s != 'F') || (s[1] != 'r') || (s[2] != 'o') || (s[3] != 'm') ||
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(s[4] != ' ')) return NIL;
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/* find end of line */
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for (x = s + 5; *x && *x != '\012'; x++);
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if (!x) return NIL; /* end of line not found */
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if (x[-1] == '\015') x--; /* ignore CR */
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if ((x - s < 27)) return NIL; /* line too short */
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if (x - s >= 41) { /* possible search for " remote from " */
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for (zn = -1; x[zn] != ' '; zn--);
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if ((x[zn-1] == 'm') && (x[zn-2] == 'o') && (x[zn-3] == 'r') &&
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(x[zn-4] == 'f') && (x[zn-5] == ' ') && (x[zn-6] == 'e') &&
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(x[zn-7] == 't') && (x[zn-8] == 'o') && (x[zn-9] == 'm') &&
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(x[zn-10] == 'e') && (x[zn-11] == 'r') && (x[zn-12] == ' '))
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if (x[-5] == ' ') { /* ends with year? */
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if (x[-8] == ':') zn = 0,ti = -5;
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/* three letter timezone? */
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else if (x[-9] == ' ') ti = zn = -9;
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/* numeric timezone? */
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else if ((x[-11]==' ') && ((x[-10]=='+') || (x[-10]=='-'))) ti = zn = -11;
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else if (x[-4] == ' ') { /* no year and three leter timezone? */
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if (x[-9] == ' ') zn = -4,ti = -9;
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else if (x[-6] == ' ') { /* no year and numeric timezone? */
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if ((x[-11] == ' ') && ((x[-5] == '+') || (x[-5] == '-')))
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/* time must be www mmm dd hh:mm[:ss] */
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if (ti && !((x[ti - 3] == ':') &&
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(x[ti -= ((x[ti - 6] == ':') ? 9 : 6)] == ' ') &&
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(x[ti - 3] == ' ') && (x[ti - 7] == ' ') &&
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(x[ti - 11] == ' '))) return NIL;
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if (rx) *rx = x; /* set return values */
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/* Berkeley manipulate driver parameters
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* Accepts: function code
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* function-dependent value
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* Returns: function-dependent return value
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void *bezerk_parameters (long function,void *value)
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/* Berkeley mail scan mailboxes
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* Accepts: mail stream
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void bezerk_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents)
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if (stream) dummy_scan (NIL,ref,pat,contents);
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/* Berkeley mail list mailboxes
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* Accepts: mail stream
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void bezerk_list (MAILSTREAM *stream,char *ref,char *pat)
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if (stream) dummy_list (stream,ref,pat);
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/* Berkeley mail list subscribed mailboxes
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* Accepts: mail stream
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void bezerk_lsub (MAILSTREAM *stream,char *ref,char *pat)
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if (stream) dummy_lsub (stream,ref,pat);
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/* Berkeley mail create mailbox
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* Accepts: MAIL stream
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* mailbox name to create
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* Returns: T on success, NIL on failure
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long bezerk_create (MAILSTREAM *stream,char *mailbox)
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return dummy_create (stream,mailbox);
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/* Berkeley mail delete mailbox
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* Accepts: MAIL stream
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* mailbox name to delete
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* Returns: T on success, NIL on failure
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long bezerk_delete (MAILSTREAM *stream,char *mailbox)
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return dummy_delete (stream,mailbox);
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/* Berkeley mail rename mailbox
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* Accepts: MAIL stream
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* new mailbox name (or NIL for delete)
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* Returns: T on success, NIL on failure
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long bezerk_rename (MAILSTREAM *stream,char *old,char *newname)
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return dummy_rename (stream,old,newname);
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/* Berkeley 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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MAILSTREAM *bezerk_open (MAILSTREAM *stream)
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char tmp[MAILTMPLEN];
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/* return prototype for OP_PROTOTYPE call */
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if (!stream) return &bezerkproto;
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if (stream->local) fatal ("bezerk recycle stream");
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if (!mailboxfile (tmp,stream->mailbox))
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return (MAILSTREAM *) bezerk_badname (tmp,stream->mailbox);
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if (((fd = open (tmp,O_BINARY|O_RDONLY,NIL)) < 0)) {
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sprintf (tmp,"Can't open mailbox: %s",strerror (errno));
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stream->rdonly = T; /* this driver is readonly */
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stream->local = fs_get (sizeof (BEZERKLOCAL));
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/* canonicalize the stream mailbox name */
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fs_give ((void **) &stream->mailbox);
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if (s = strchr ((s = strrchr (tmp,'\\')) ? s : tmp,'.')) *s = '\0';
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stream->mailbox = cpystr (tmp);
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LOCAL->fd = fd; /* note the file */
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LOCAL->filesize = 0; /* initialize parsed file size */
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LOCAL->buf = NIL; /* initially no local buffer */
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stream->sequence++; /* bump sequence number */
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stream->uid_validity = time (0);
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stream->nmsgs = stream->recent = 0;
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if (!bezerk_ping (stream)) return NIL;
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if (!stream->nmsgs) mm_log ("Mailbox is empty",(long) NIL);
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stream->perm_seen = stream->perm_deleted =
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stream->perm_flagged = stream->perm_answered = stream->perm_draft = NIL;
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stream->perm_user_flags = NIL;
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return stream; /* return stream to caller */
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/* Berkeley mail close
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* Accepts: MAIL stream
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void bezerk_close (MAILSTREAM *stream,long options)
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if (stream && LOCAL) { /* only if a file is open */
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int silent = stream->silent;
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if (options & CL_EXPUNGE) bezerk_expunge (stream,NIL,NIL);
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close (LOCAL->fd); /* close the local file */
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if (LOCAL->buf) fs_give ((void **) &LOCAL->buf);
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/* nuke the local data */
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fs_give ((void **) &stream->local);
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stream->dtb = NIL; /* log out the DTB */
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/* Berkeley mail fetch message header
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* Accepts: MAIL stream
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* pointer to returned header text length
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* Returns: message header in RFC822 format
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char *bezerk_header (MAILSTREAM *stream,unsigned long msgno,
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unsigned long *length,long flags)
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char tmp[MAILTMPLEN];
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*length = 0; /* default to empty */
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if (flags & FT_UID) return "";/* UID call "impossible" */
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/* get to header position */
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lseek (LOCAL->fd,bezerk_hdrpos (stream,msgno,length),L_SET);
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/* is buffer big enough? */
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if (LOCAL->buf) fs_give ((void **) &LOCAL->buf);
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LOCAL->buf = (char *) fs_get ((size_t) *length + 1);
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LOCAL->buf[*length] = '\0'; /* tie off string */
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read (LOCAL->fd,LOCAL->buf,(size_t) *length);
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/* Berkeley mail fetch message text (body only)
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* Accepts: MAIL stream
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* pointer to returned header text length
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long bezerk_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags)
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unsigned long hdrsize,hdrpos;
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/* UID call "impossible" */
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if (flags & FT_UID) return NIL;
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elt = mail_elt (stream,msgno);/* if message not seen */
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/* mark message as seen */
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if (elt->seen && !(flags & FT_PEEK)) {
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mm_flags (stream,msgno);
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/* get location of text data */
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hdrpos = bezerk_hdrpos (stream,msgno,&hdrsize);
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d.fd = LOCAL->fd; /* set initial stringstruct */
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d.pos = hdrpos + hdrsize;
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/* flush old buffer */
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if (LOCAL->buf) fs_give ((void **) &LOCAL->buf);
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d.chunk = LOCAL->buf = (char *) fs_get ((size_t) d.chunksize = CHUNKSIZE);
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INIT (bs,fd_string,(void *) &d,elt->rfc822_size - hdrsize);
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return T; /* success */
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/* Berkeley mail ping mailbox
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* Accepts: MAIL stream
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* Returns: T if stream still alive, NIL if not
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long bezerk_ping (MAILSTREAM *stream)
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/* punt if stream no longer alive */
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if (!(stream && LOCAL)) return NIL;
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/* parse mailbox, punt if parse dies */
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return (bezerk_parse (stream)) ? T : NIL;
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/* Berkeley mail check mailbox (reparses status too)
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* Accepts: MAIL stream
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void bezerk_check (MAILSTREAM *stream)
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if (bezerk_ping (stream)) { /* ping mailbox */
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/* get new message status */
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while (i <= stream->nmsgs) mail_elt (stream,i++);
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mm_log ("Check completed",(long) NIL);
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/* Berkeley mail expunge mailbox
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* Accepts: MAIL stream
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* sequence to expunge if non-NIL
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long bezerk_expunge (MAILSTREAM *stream,char *sequence,long options)
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if (!stream->silent) mm_log ("Expunge ignored on readonly mailbox",WARN);
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/* Berkeley mail copy message(s)
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* Accepts: MAIL stream
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* destination mailbox
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* Returns: T if success, NIL if failed
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long bezerk_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options)
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char tmp[MAILTMPLEN];
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(mailproxycopy_t) mail_parameters (stream,GET_MAILPROXYCOPY,NIL);
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if (!((options & CP_UID) ? mail_uid_sequence (stream,sequence) :
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mail_sequence (stream,sequence))) return NIL;
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/* make sure valid mailbox */
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if (!bezerk_isvalid (mailbox,tmp) && errno) {
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mm_notify (stream,"[TRYCREATE] Must create mailbox before append",
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else if (pc) return (*pc) (stream,sequence,mailbox,options);
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else if (mailboxfile (tmp,mailbox)) {
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sprintf (tmp,"Not a Bezerk-format mailbox: %s",mailbox);
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else bezerk_badname (tmp,mailbox);
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/* open the destination */
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if (!mailboxfile (tmp,mailbox) ||
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(fd = open (tmp,O_BINARY|O_WRONLY|O_APPEND|O_CREAT,
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S_IREAD|S_IWRITE)) < 0) {
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sprintf (tmp,"Unable to open copy mailbox: %s",strerror (errno));
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mm_critical (stream); /* go critical */
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fstat (fd,&sbuf); /* get current file size */
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/* for each requested message */
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for (i = 1; i <= stream->nmsgs; i++)
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if ((elt = mail_elt (stream,i))->sequence) {
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lseek (LOCAL->fd,elt->private.special.offset,SEEK_SET);
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/* number of bytes to copy */
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j = elt->private.msg.full.offset + elt->rfc822_size;
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do { /* read from source position */
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k = min (j,(unsigned long) MAILTMPLEN);
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read (LOCAL->fd,tmp,(unsigned int) k);
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if (write (fd,tmp,(unsigned int) k) < 0) {
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sprintf (tmp,"Unable to write message: %s",strerror (errno));
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chsize (fd,sbuf.st_size);
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close (fd); /* punt */
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mm_nocritical (stream);
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} while (j -= k); /* until done */
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close (fd); /* close the file */
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mm_nocritical (stream); /* release critical */
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/* delete all requested messages */
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if (options & CP_MOVE) for (i = 1; i <= stream->nmsgs; i++)
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if ((elt = mail_elt (stream,i))->sequence) elt->deleted = T;
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if (mail_parameters (NIL,GET_COPYUID,NIL))
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mm_log ("Can not return meaningful COPYUID with this mailbox format",WARN);
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/* Berkeley mail append message from stringstruct
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* Accepts: MAIL stream
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* destination mailbox
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* Returns: T if append successful, else NIL
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#define BUFLEN MAILTMPLEN
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long bezerk_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data)
575
char *flags,*date,buf[BUFLEN],tmp[MAILTMPLEN],file[MAILTMPLEN];
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/* default stream to prototype */
581
if (!stream) stream = &bezerkproto;
582
/* make sure valid mailbox */
583
if (!bezerk_isvalid (mailbox,tmp) && errno) {
584
if (errno == ENOENT) {
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if (((mailbox[0] == 'I') || (mailbox[0] == 'i')) &&
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((mailbox[1] == 'N') || (mailbox[1] == 'n')) &&
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((mailbox[2] == 'B') || (mailbox[2] == 'b')) &&
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((mailbox[3] == 'O') || (mailbox[3] == 'o')) &&
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((mailbox[4] == 'X') || (mailbox[4] == 'x')) && !mailbox[5])
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bezerk_create (NIL,"INBOX");
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mm_notify (stream,"[TRYCREATE] Must create mailbox before append",NIL);
596
else if (mailboxfile (tmp,mailbox)) {
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sprintf (tmp,"Not a Bezerk-format mailbox: %.80ss",mailbox);
600
else bezerk_badname (tmp,mailbox);
603
tzset (); /* initialize timezone stuff */
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/* get first message */
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if (!(*af) (stream,data,&flags,&date,&message)) return NIL;
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if (!(sf = tmpfile ())) { /* must have scratch file */
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sprintf (tmp,"Unable to create scratch file: %.80s",strerror (errno));
611
do { /* parse date */
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if (!date) rfc822_date (date = tmp);
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if (!mail_parse_date (&elt,date)) {
614
sprintf (tmp,"Bad date in append: %.80s",date);
617
else { /* user wants to suppress time zones? */
618
if (mail_parameters (NIL,GET_NOTIMEZONES,NIL)) {
619
time_t when = mail_longdate (&elt);
620
date = ctime (&when); /* use traditional date */
622
/* use POSIX-style date */
623
else date = mail_cdate (tmp,&elt);
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if (!SIZE (message)) mm_log ("Append of zero-length message",ERROR);
625
else if (!bezerk_append_msg (stream,sf,flags,date,message)) {
626
sprintf (tmp,"Error writing scratch file: %.80s",strerror (errno));
629
/* get next message */
630
else if ((*af) (stream,data,&flags,&date,&message)) continue;
632
fclose (sf); /* punt scratch file */
633
return NIL; /* give up */
634
} while (message); /* until no more messages */
635
if (fflush (sf) || fstat (fileno (sf),&sbuf)) {
636
sprintf (tmp,"Error finishing scratch file: %.80s",strerror (errno));
638
fclose (sf); /* punt scratch file */
639
return NIL; /* give up */
641
i = sbuf.st_size; /* size of scratch file */
643
mm_critical (stream); /* go critical */
644
/* open the destination */
645
if (!mailboxfile (tmp,mailbox) ||
646
((fd = open (tmp,O_BINARY|O_WRONLY|O_APPEND|O_CREAT,
647
S_IREAD|S_IWRITE)) < 0) ||
648
!(df = fdopen (fd,"ab"))) {
649
mm_nocritical (stream); /* done with critical */
650
sprintf (tmp,"Can't open append mailbox: %s",strerror (errno));
654
fstat (fd,&sbuf); /* get current file size */
655
while (i) /* until written all bytes */
656
if ((j = fread (buf,1,min ((long) BUFLEN,i),sf)) &&
657
(fwrite (buf,1,j,df) == j)) i -= j;
658
fclose (sf); /* done with scratch file */
659
/* make sure append wins */
660
if (i || (fflush (df) == EOF)) {
661
chsize (fd,sbuf.st_size); /* revert file */
662
close (fd); /* make sure fclose() doesn't corrupt us */
663
sprintf (buf,"Message append failed: %s",strerror (errno));
665
ret = NIL; /* return error */
668
mm_nocritical (stream); /* release critical */
669
if (ret && mail_parameters (NIL,GET_APPENDUID,NIL))
670
mm_log ("Can not return meaningful APPENDUID with this mailbox format",
675
/* Write single message to append scratch file
676
* Accepts: MAIL stream
679
* message stringstruct
680
* Returns: NIL if write error, else T
683
int bezerk_append_msg (MAILSTREAM *stream,FILE *sf,char *flags,char *date,
688
char tmp[MAILTMPLEN];
689
long f = mail_parse_flags (stream,flags,&uf);
690
/* build initial header */
691
if ((fprintf (sf,"From %s@%s %sStatus: ",
692
myusername (),mylocalhost (),date) < 0) ||
693
(f&fSEEN && (putc ('R',sf) == EOF)) ||
694
(fputs ("\nX-Status: ",sf) == EOF) ||
695
(f&fDELETED && (putc ('D',sf) == EOF)) ||
696
(f&fFLAGGED && (putc ('F',sf) == EOF)) ||
697
(f&fANSWERED && (putc ('A',sf) == EOF)) ||
698
(f&fDRAFT && (putc ('T',sf) == EOF)) ||
699
(fputs ("\nX-Keywords:",sf) == EOF)) return NIL;
700
while (uf) /* write user flags */
701
if (fprintf (sf," %s",stream->user_flags[find_rightmost_bit (&uf)]) < 0)
704
if (putc ('\n',sf) == EOF) return NIL;
705
while (SIZE (msg)) { /* copy text to scratch file */
706
/* possible delimiter if line starts with F */
707
if ((c = 0xff & SNX (msg)) == 'F') {
708
/* copy line to buffer */
709
for (i = 1,tmp[0] = c; SIZE (msg) && (c != '\n') && (i < MAILTMPLEN);)
710
if (((c = 0xff & SNX (msg)) != '\r') || !(SIZE (msg)) ||
711
(CHR (msg) != '\n')) tmp[i++] = c;
712
if ((i > 4) && (tmp[1] == 'r') && (tmp[2] == 'o') && (tmp[3] == 'm') &&
713
(tmp[4] == ' ')) { /* possible "From " line? */
714
/* yes, see if need to write a widget */
715
if (((c != '\n') || bezerk_valid_line (tmp,NIL,NIL)) &&
716
(putc ('>',sf) == EOF)) return NIL;
718
/* write buffered text */
719
if (fwrite (tmp,1,i,sf) != i) return NIL;
720
if (c == '\n') continue; /* all done if got a complete line */
722
/* copy line, toss out CR from CRLF */
723
do if (((c == '\r') && SIZE (msg) && ((c = 0xff & SNX (msg)) != '\n') &&
724
(putc ('\r',sf) == EOF)) || (putc (c,sf) == EOF)) return NIL;
725
while ((c != '\n') && SIZE (msg) && ((c = 0xff & SNX (msg)) ? c : T));
727
/* write trailing newline and return */
728
return (putc ('\n',sf) == EOF) ? NIL : T;
732
/* Return bad file name error message
733
* Accepts: temporary buffer
735
* Returns: long NIL always
738
long bezerk_badname (char *tmp,char *s)
740
sprintf (tmp,"Invalid mailbox name: %s",s);
746
* Accepts: MAIL stream
747
* Returns: T if parse OK
748
* NIL if failure, stream aborted
751
long bezerk_parse (MAILSTREAM *stream)
755
char *s,*t,tmp[MAILTMPLEN + 1],*db,datemsg[100];
758
long curpos = LOCAL->filesize;
759
long nmsgs = stream->nmsgs;
760
long recent = stream->recent;
761
short silent = stream->silent;
762
fstat (LOCAL->fd,&sbuf); /* get status */
763
if (sbuf.st_size < curpos) { /* sanity check */
764
sprintf (tmp,"Mailbox shrank from %ld to %ld!",curpos,sbuf.st_size);
766
bezerk_close (stream,NIL);
769
stream->silent = T; /* don't pass up mm_exists() events yet */
770
db = datemsg + strlen (strcpy (datemsg,"Unparsable date: "));
771
/* while there is data to read */
772
while (i = sbuf.st_size - curpos){
773
/* get to that position in the file */
774
lseek (LOCAL->fd,curpos,SEEK_SET);
775
/* read first buffer's worth */
776
read (LOCAL->fd,tmp,j = (int) min (i,(long) MAILTMPLEN));
777
tmp[j] = '\0'; /* tie off buffer */
778
if (!(ti = bezerk_valid_line (tmp,&t,&zn))) {
779
mm_log ("Mailbox format invalidated (consult an expert), aborted",ERROR);
780
bezerk_close (stream,NIL);
784
/* swell the cache */
785
mail_exists (stream,++nmsgs);
786
/* instantiate an elt for this message */
787
(elt = mail_elt (stream,nmsgs))->valid = T;
788
elt->private.uid = ++stream->uid_last;
789
/* note file offset of header */
790
elt->private.special.offset = curpos;
791
/* note offset of message */
792
elt->private.msg.full.offset =
793
(s = ((*t == '\015') ? (t + 2) : (t + 1))) - tmp;
794
/* generate plausable IMAPish date string */
795
db[2] = db[6] = db[20] = '-'; db[11] = ' '; db[14] = db[17] = ':';
797
db[0] = t[ti - 2]; db[1] = t[ti - 1];
799
db[3] = t[ti - 6]; db[4] = t[ti - 5]; db[5] = t[ti - 4];
801
db[12] = t[ti + 1]; db[13] = t[ti + 2];
803
db[15] = t[ti + 4]; db[16] = t[ti + 5];
804
if (t[ti += 6] == ':') { /* ss if present */
805
db[18] = t[++ti]; db[19] = t[++ti];
806
ti++; /* move to space */
808
else db[18] = db[19] = '0'; /* assume 0 seconds */
809
/* yy -- advance over timezone if necessary */
810
if (++zn == ++ti) ti += (((t[zn] == '+') || (t[zn] == '-')) ? 6 : 4);
811
db[7] = t[ti]; db[8] = t[ti + 1]; db[9] = t[ti + 2]; db[10] = t[ti + 3];
812
t = zn ? (t + zn) : "LCL"; /* zzz */
813
db[21] = *t++; db[22] = *t++; db[23] = *t++;
814
if ((db[21] != '+') && (db[21] != '-')) db[24] = '\0';
815
else { /* numeric time zone */
816
db[20] = ' '; db[24] = *t++; db[25] = *t++; db[26] = '\0';
818
/* set internal date */
819
if (!mail_parse_date (elt,db)) mm_log (datemsg,WARN);
821
curpos += s - tmp; /* advance position after header */
822
t = strchr (s,'\012'); /* start of next line */
823
/* find start of next message */
824
while (!(bezerk_valid_line (s,NIL,NIL))) {
825
if (t) { /* have next line? */
826
t++; /* advance to new line */
827
curpos += t - s; /* update position and size */
828
elt->rfc822_size += ((t - s) + ((t[-2] == '\015') ? 0 : 1));
829
s = t; /* move to next line */
830
t = strchr (s,'\012');
832
else { /* try next buffer */
833
j = strlen (s); /* length of unread data in buffer */
834
if ((i = sbuf.st_size - curpos) && (i != j)) {
835
/* get to that position in the file */
836
lseek (LOCAL->fd,curpos,SEEK_SET);
837
/* read another buffer's worth */
838
read (LOCAL->fd,s = tmp,j = (int) min (i,(long) MAILTMPLEN));
839
tmp[j] = '\0'; /* tie off buffer */
840
if (!(t = strchr (s,'\012'))) fatal ("Line too long in mailbox");
843
curpos += j; /* last bit of data */
844
elt->rfc822_size += j;
850
/* update parsed file size */
851
LOCAL->filesize = sbuf.st_size;
852
stream->silent = silent; /* can pass up events now */
853
mail_exists (stream,nmsgs); /* notify upper level of new mailbox size */
854
mail_recent (stream,recent); /* and of change in recent messages */
855
return T; /* return the winnage */
858
/* Berkeley locate header for a message
859
* Accepts: MAIL stream
861
* pointer to returned header size
862
* Returns: position of header in file
865
unsigned long bezerk_hdrpos (MAILSTREAM *stream,unsigned long msgno,
872
char tmp[MAILTMPLEN];
873
MESSAGECACHE *elt = mail_elt (stream,msgno);
874
long pos = elt->private.special.offset + elt->private.msg.full.offset;
876
if (!(*size = elt->private.msg.header.text.size)) {
877
/* get to header position */
878
lseek (LOCAL->fd,pos,SEEK_SET);
879
/* search message for CRLF CRLF */
880
for (siz = 1; siz <= elt->rfc822_size; siz++) {
881
if (!i && /* buffer empty? */
882
(read (LOCAL->fd,s = tmp,
883
i = (size_t) min(elt->rfc822_size-siz,(long)MAILTMPLEN))<= 0))
886
/* two newline sequence? */
887
if ((c == '\012') && (*s == '\012')) {
888
/* yes, note for later */
889
elt->private.msg.header.text.size = (*size = siz);
890
return pos; /* return to caller */
892
else if ((c == '\012') && (*s == '\015')) {
893
/* yes, note for later */
894
elt->private.msg.header.text.size = (*size = siz + 1);
895
return pos; /* return to caller */
897
else c = *s++; /* next character */
900
return pos; /* have position */
added
removed
imap/src/osdep/dos/bezrkdos.c
