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mx.c
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C/C++ Source or Header
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1998-09-25
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32KB
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1,035 lines
/*
* Program: MX mail routines
*
* Author(s): Mark Crispin
* Networks and Distributed Computing
* Computing & Communications
* University of Washington
* Administration Building, AG-44
* Seattle, WA 98195
* Internet: MRC@CAC.Washington.EDU
*
* Date: 3 May 1996
* Last Edited: 23 September 1998
*
* Copyright 1998 by the University of Washington
*
* Permission to use, copy, modify, and distribute this software and its
* documentation for any purpose and without fee is hereby granted, provided
* that the above copyright notice appears in all copies and that both the
* above copyright notice and this permission notice appear in supporting
* documentation, and that the name of the University of Washington not be
* used in advertising or publicity pertaining to distribution of the software
* without specific, written prior permission. This software is made
* available "as is", and
* THE UNIVERSITY OF WASHINGTON DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED,
* WITH REGARD TO THIS SOFTWARE, INCLUDING WITHOUT LIMITATION ALL IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, AND IN
* NO EVENT SHALL THE UNIVERSITY OF WASHINGTON BE LIABLE FOR ANY SPECIAL,
* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, TORT
* (INCLUDING NEGLIGENCE) OR STRICT LIABILITY, ARISING OUT OF OR IN CONNECTION
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#include <stdio.h>
#include <ctype.h>
#include <errno.h>
extern int errno; /* just in case */
#include "mail.h"
#include "osdep.h"
#include <pwd.h>
#include <sys/stat.h>
#include <sys/time.h>
#include "mx.h"
#include "misc.h"
#include "dummy.h"
/* MX mail routines */
/* Driver dispatch used by MAIL */
DRIVER mxdriver = {
"mx", /* driver name */
/* driver flags */
DR_MAIL|DR_LOCAL|DR_NOFAST|DR_CRLF,
(DRIVER *) NIL, /* next driver */
mx_valid, /* mailbox is valid for us */
mx_parameters, /* manipulate parameters */
mx_scan, /* scan mailboxes */
mx_list, /* find mailboxes */
mx_lsub, /* find subscribed mailboxes */
mx_subscribe, /* subscribe to mailbox */
mx_unsubscribe, /* unsubscribe from mailbox */
mx_create, /* create mailbox */
mx_delete, /* delete mailbox */
mx_rename, /* rename mailbox */
NIL, /* status of mailbox */
mx_open, /* open mailbox */
mx_close, /* close mailbox */
mx_fast, /* fetch message "fast" attributes */
NIL, /* fetch message flags */
NIL, /* fetch overview */
NIL, /* fetch message envelopes */
mx_header, /* fetch message header only */
mx_text, /* fetch message body only */
NIL, /* fetch partial message test */
NIL, /* unique identifier */
NIL, /* message number */
mx_flag, /* modify flags */
mx_flagmsg, /* per-message modify flags */
NIL, /* search for message based on criteria */
NIL, /* sort messages */
NIL, /* thread messages */
mx_ping, /* ping mailbox to see if still alive */
mx_check, /* check for new messages */
mx_expunge, /* expunge deleted messages */
mx_copy, /* copy messages to another mailbox */
mx_append, /* append string message to mailbox */
NIL /* garbage collect stream */
};
/* prototype stream */
MAILSTREAM mxproto = {&mxdriver};
/* MX mail validate mailbox
* Accepts: mailbox name
* Returns: our driver if name is valid, NIL otherwise
*/
DRIVER *mx_valid (char *name)
{
char tmp[MAILTMPLEN];
return mx_isvalid (name,tmp) ? &mxdriver : NIL;
}
/* MX mail test for valid mailbox
* Accepts: mailbox name
* temporary buffer to use
* Returns: T if valid, NIL otherwise
*/
int mx_isvalid (char *name,char *tmp)
{
struct stat sbuf;
errno = NIL; /* zap error */
/* validate name as directory */
return (!stat (MXINDEX (tmp,name),&sbuf) &&
((sbuf.st_mode & S_IFMT) == S_IFREG));
}
/* MX manipulate driver parameters
* Accepts: function code
* function-dependent value
* Returns: function-dependent return value
*/
void *mx_parameters (long function,void *value)
{
return NIL;
}
/* MX scan mailboxes
* Accepts: mail stream
* reference
* pattern to search
* string to scan
*/
void mx_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents)
{
if (stream) mm_log ("Scan not valid for mx mailboxes",ERROR);
}
/* MX list mailboxes
* Accepts: mail stream
* reference
* pattern to search
*/
void mx_list (MAILSTREAM *stream,char *ref,char *pat)
{
char *s,test[MAILTMPLEN],file[MAILTMPLEN];
long i = 0;
/* get canonical form of name */
if (stream && dummy_canonicalize (test,ref,pat)) {
/* found any wildcards? */
if (s = strpbrk (test,"%*")) {
/* yes, copy name up to that point */
strncpy (file,test,i = s - test);
file[i] = '\0'; /* tie off */
}
else strcpy (file,test); /* use just that name then */
/* find directory name */
if (s = strrchr (file,'/')) {
*s = '\0'; /* found, tie off at that point */
s = file;
}
/* do the work */
mx_list_work (stream,s,test,0);
}
}
/* MX list subscribed mailboxes
* Accepts: mail stream
* reference
* pattern to search
*/
void mx_lsub (MAILSTREAM *stream,char *ref,char *pat)
{
if (stream) dummy_lsub (NIL,ref,pat);
}
/* MX list mailboxes worker routine
* Accepts: mail stream
* directory name to search
* search pattern
* search level
*/
void mx_list_work (MAILSTREAM *stream,char *dir,char *pat,long level)
{
DIR *dp;
struct direct *d;
struct stat sbuf;
char *cp,*np,curdir[MAILTMPLEN],name[MAILTMPLEN],tmp[MAILTMPLEN];
/* make mailbox and directory names */
if ((np = name + strlen (strcpy (name,dir ? dir : ""))) != name) *np++ = '/';
cp = curdir + strlen (strcat ((mx_file(curdir,dir ? dir:myhomedir())),"/"));
if (dp = opendir (curdir)) { /* open directory */
while (d = readdir (dp)) { /* scan directory, ignore all . names */
if (d->d_name[0] != '.') {/* build file name */
if (level < (long) mail_parameters (NIL,GET_LISTMAXLEVEL,NIL)) {
strcpy (cp,d->d_name);/* make directory name */
strcpy (np,d->d_name);/* make mx name of directory name */
if (dmatch (name,pat,'/') && !stat (curdir,&sbuf) &&
((sbuf.st_mode &= S_IFMT) == S_IFDIR))
mx_list_work (stream,name,pat,level+1);
}
}
else if (!strcmp (d->d_name,MXINDEXNAME+1) && pmatch_full (dir,pat,'/'))
mm_list (stream,'/',dir,NIL);
}
closedir (dp); /* all done, flush directory */
}
}
/* MX mail subscribe to mailbox
* Accepts: mail stream
* mailbox to add to subscription list
* Returns: T on success, NIL on failure
*/
long mx_subscribe (MAILSTREAM *stream,char *mailbox)
{
char tmp[MAILTMPLEN];
return sm_subscribe (mailbox);
}
/* MX mail unsubscribe to mailbox
* Accepts: mail stream
* mailbox to delete from subscription list
* Returns: T on success, NIL on failure
*/
long mx_unsubscribe (MAILSTREAM *stream,char *mailbox)
{
char tmp[MAILTMPLEN];
return sm_unsubscribe (mailbox);
}
/* MX mail create mailbox
* Accepts: mail stream
* mailbox name to create
* Returns: T on success, NIL on failure
*/
long mx_create (MAILSTREAM *stream,char *mailbox)
{
int fd;
char tmp[MAILTMPLEN],mbx[MAILTMPLEN];
if (mx_isvalid (mailbox,tmp)) /* must not already exist */
sprintf (tmp,"Can't create mailbox %.80s: mailbox already exists",mailbox);
/* create directory */
else if (!dummy_create_path (stream,strcat (mx_file (mbx,mailbox),"/")))
sprintf (tmp,"Can't create mailbox leaf %.80s: %s",
mailbox,strerror (errno));
/* create index file */
else if (((fd = open (MXINDEX (tmp,mailbox),O_WRONLY|O_CREAT|O_EXCL,
(int) mail_parameters (NIL,GET_MBXPROTECTION,mailbox)))
<0 ) || close (fd))
sprintf (tmp,"Can't create mailbox index %.80s: %s",
mailbox,strerror (errno));
/* success */
else return set_mbx_protections (mailbox,mbx) &&
set_mbx_protections (mailbox,tmp);
mm_log (tmp,ERROR); /* some error */
return NIL;
}
/* MX mail delete mailbox
* mailbox name to delete
* Returns: T on success, NIL on failure
*/
long mx_delete (MAILSTREAM *stream,char *mailbox)
{
DIR *dirp;
struct direct *d;
char *s;
char tmp[MAILTMPLEN];
if (!mx_isvalid (mailbox,tmp))
sprintf (tmp,"Can't delete mailbox %.80s: no such mailbox",mailbox);
/* delete index */
else if (unlink (MXINDEX (tmp,mailbox)))
sprintf (tmp,"Can't delete mailbox %.80s index: %s",
mailbox,strerror (errno));
else { /* get directory name */
*(s = strrchr (tmp,'/')) = '\0';
if (dirp = opendir (tmp)) { /* open directory */
*s++ = '/'; /* restore delimiter */
/* massacre messages */
while (d = readdir (dirp)) if (mx_select (d)) {
strcpy (s,d->d_name); /* make path */
unlink (tmp); /* sayonara */
}
closedir (dirp); /* flush directory */
}
/* success if can remove the directory */
if (!rmdir (mx_file (tmp,mailbox))) return T;
sprintf (tmp,"Can't delete mailbox %.80s: %s",mailbox,strerror (errno));
}
mm_log (tmp,ERROR); /* something failed */
return NIL;
}
/* MX mail rename mailbox
* Accepts: MX mail stream
* old mailbox name
* new mailbox name
* Returns: T on success, NIL on failure
*/
long mx_rename (MAILSTREAM *stream,char *old,char *newname)
{
char c,*s,tmp[MAILTMPLEN],tmp1[MAILTMPLEN];
struct stat sbuf;
if (!mx_isvalid (old,tmp))
sprintf (tmp,"Can't rename mailbox %.80s: no such mailbox",old);
/* new mailbox name must not be valid */
else if (mx_isvalid (newname,tmp))
sprintf (tmp,"Can't rename to mailbox %.80s: destination already exists",
newname);
/* success if can rename the directory */
else { /* found superior to destination name? */
if (s = strrchr (mx_file (tmp1,newname),'/')) {
c = *++s; /* remember first character of inferior */
*s = '\0'; /* tie off to get just superior */
/* name doesn't exist, create it */
if ((stat (tmp1,&sbuf) || ((sbuf.st_mode & S_IFMT) != S_IFDIR)) &&
!dummy_create (stream,tmp1)) return NIL;
*s = c; /* restore full name */
}
if (!rename (mx_file (tmp,old),tmp1)) return T;
sprintf (tmp,"Can't rename mailbox %.80s to %.80s: %s",
old,newname,strerror (errno));
}
mm_log (tmp,ERROR); /* something failed */
return NIL;
}
/* MX mail open
* Accepts: stream to open
* Returns: stream on success, NIL on failure
*/
MAILSTREAM *mx_open (MAILSTREAM *stream)
{
int i;
char tmp[MAILTMPLEN];
/* return prototype for OP_PROTOTYPE call */
if (!stream) return user_flags (&mxproto);
if (stream->local) fatal ("mx recycle stream");
stream->local = fs_get (sizeof (MXLOCAL));
/* note if an INBOX or not */
LOCAL->inbox = !strcmp (ucase (strcpy (tmp,stream->mailbox)),"INBOX");
mx_file (tmp,stream->mailbox);/* get directory name */
LOCAL->dir = cpystr (tmp); /* copy directory name for later */
/* make temporary buffer */
LOCAL->buf = (char *) fs_get ((LOCAL->buflen = MAXMESSAGESIZE) + 1);
LOCAL->scantime = 0; /* not scanned yet */
LOCAL->fd = -1; /* no index yet */
stream->sequence++; /* bump sequence number */
/* parse mailbox */
stream->nmsgs = stream->recent = 0;
if (mx_ping (stream) && !(stream->nmsgs || stream->silent))
mm_log ("Mailbox is empty",(long) NIL);
stream->perm_seen = stream->perm_deleted = stream->perm_flagged =
stream->perm_answered = stream->perm_draft = stream->rdonly ? NIL : T;
stream->perm_user_flags = stream->rdonly ? NIL : 0xffffffff;
stream->kwd_create = (stream->user_flags[NUSERFLAGS-1] || stream->rdonly) ?
NIL : T; /* can we create new user flags? */
return stream; /* return stream to caller */
}
/* MX mail close
* Accepts: MAIL stream
* close options
*/
void mx_close (MAILSTREAM *stream,long options)
{
if (LOCAL) { /* only if a file is open */
int silent = stream->silent;
stream->silent = T; /* note this stream is dying */
if (options & CL_EXPUNGE) mx_expunge (stream);
if (LOCAL->dir) fs_give ((void **) &LOCAL->dir);
/* free local scratch 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 */
stream->silent = silent; /* reset silent state */
}
}
/* MX mail fetch fast information
* Accepts: MAIL stream
* sequence
* option flags
*/
void mx_fast (MAILSTREAM *stream,char *sequence,long flags)
{
unsigned long i;
MESSAGECACHE *elt;
if (stream && LOCAL &&
((flags & FT_UID) ? mail_uid_sequence (stream,sequence) :
mail_sequence (stream,sequence)))
for (i = 1; i <= stream->nmsgs; i++)
if ((elt = mail_elt (stream,i))->sequence) mx_fast_work (stream,elt);
}
/* MX mail fetch fast information
* Accepts: MAIL stream
* message cache element
* Returns: name of message file
*/
char *mx_fast_work (MAILSTREAM *stream,MESSAGECACHE *elt)
{
struct stat sbuf;
struct tm *tm;
/* build message file name */
sprintf (LOCAL->buf,"%s/%lu",LOCAL->dir,elt->private.uid);
if (!elt->rfc822_size) { /* have size yet? */
stat (LOCAL->buf,&sbuf); /* get size of message */
/* make plausible IMAPish date string */
tm = gmtime (&sbuf.st_mtime);
elt->day = tm->tm_mday; elt->month = tm->tm_mon + 1;
elt->year = tm->tm_year + 1900 - BASEYEAR;
elt->hours = tm->tm_hour; elt->minutes = tm->tm_min;
elt->seconds = tm->tm_sec;
elt->zhours = 0; elt->zminutes = 0; elt->zoccident = 0;
elt->rfc822_size = sbuf.st_size;
}
return LOCAL->buf; /* return file name */
}
/* MX 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 *mx_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *length,
long flags)
{
unsigned long i;
int fd;
MESSAGECACHE *elt;
*length = 0; /* default to empty */
if (flags & FT_UID) return "";/* UID call "impossible" */
elt = mail_elt (stream,msgno);/* get elt */
if (!elt->private.msg.header.text.data) {
if ((fd = open (mx_fast_work (stream,elt),O_RDONLY,NIL)) < 0) return "";
/* is buffer big enough? */
if (elt->rfc822_size > LOCAL->buflen) {
fs_give ((void **) &LOCAL->buf);
LOCAL->buf = (char *) fs_get ((LOCAL->buflen = elt->rfc822_size) + 1);
}
/* slurp message */
read (fd,LOCAL->buf,elt->rfc822_size);
/* tie off file */
LOCAL->buf[elt->rfc822_size] = '\0';
close (fd); /* flush message file */
/* find end of header */
if (elt->rfc822_size < 4) i = 0;
else for (i = 4; (i < elt->rfc822_size) &&
!((LOCAL->buf[i - 4] == '\015') &&
(LOCAL->buf[i - 3] == '\012') &&
(LOCAL->buf[i - 2] == '\015') &&
(LOCAL->buf[i - 1] == '\012')); i++);
/* copy header */
cpytxt (&elt->private.msg.header.text,LOCAL->buf,i);
cpytxt (&elt->private.msg.text.text,LOCAL->buf+i,elt->rfc822_size - i);
}
*length = elt->private.msg.header.text.size;
return (char *) elt->private.msg.header.text.data;
}
/* MX mail fetch message text (body only)
* Accepts: MAIL stream
* message # to fetch
* pointer to returned stringstruct
* option flags
* Returns: T on success, NIL on failure
*/
long mx_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags)
{
unsigned long i;
MESSAGECACHE *elt;
/* UID call "impossible" */
if (flags & FT_UID) return NIL;
elt = mail_elt (stream,msgno);
/* snarf message if don't have it yet */
if (!elt->private.msg.text.text.data) {
mx_header (stream,msgno,&i,flags);
if (!elt->private.msg.text.text.data) return NIL;
}
/* mark as seen */
if (!(flags & FT_PEEK) && mx_lockindex (stream)) {
elt->seen = T;
mx_unlockindex (stream);
mm_flags (stream,msgno);
}
INIT (bs,mail_string,elt->private.msg.text.text.data,
elt->private.msg.text.text.size);
return T;
}
/* MX mail modify flags
* Accepts: MAIL stream
* sequence
* flag(s)
* option flags
*/
void mx_flag (MAILSTREAM *stream,char *sequence,char *flag,long flags)
{
mx_unlockindex (stream); /* finished with index */
}
/* MX per-message modify flags
* Accepts: MAIL stream
* message cache element
*/
void mx_flagmsg (MAILSTREAM *stream,MESSAGECACHE *elt)
{
mx_lockindex (stream); /* lock index if not already locked */
}
/* MX mail ping mailbox
* Accepts: MAIL stream
* Returns: T if stream alive, else NIL
*/
long mx_ping (MAILSTREAM *stream)
{
MAILSTREAM *sysibx = NIL;
MESSAGECACHE *elt,*selt;
struct stat sbuf;
char *s,tmp[MAILTMPLEN];
int fd;
unsigned long i,j,r,old;
long nmsgs = stream->nmsgs;
long recent = stream->recent;
int silent = stream->silent;
if (stat (LOCAL->dir,&sbuf)) return NIL;
stream->silent = T; /* don't pass up mm_exists() events yet */
if (sbuf.st_ctime != LOCAL->scantime) {
struct direct **names = NIL;
long nfiles = scandir (LOCAL->dir,&names,mx_select,mx_numsort);
if (nfiles < 0) nfiles = 0; /* in case error */
old = stream->uid_last;
/* note scanned now */
LOCAL->scantime = sbuf.st_ctime;
/* scan directory */
for (i = 0; i < nfiles; ++i) {
/* if newly seen, add to list */
if ((j = atoi (names[i]->d_name)) > old) {
/* swell the cache */
mail_exists (stream,++nmsgs);
stream->uid_last = (elt = mail_elt (stream,nmsgs))->private.uid = j;
elt->valid = T; /* note valid flags */
if (old) { /* other than the first pass? */
elt->recent = T; /* yup, mark as recent */
recent++; /* bump recent count */
}
}
fs_give ((void **) &names[i]);
}
/* free directory */
if (names) fs_give ((void **) &names);
}
stream->nmsgs = nmsgs; /* don't upset mail_uid() */
/* if INBOX, snarf from system INBOX */
if (mx_lockindex (stream) && LOCAL->inbox) {
old = stream->uid_last;
/* paranoia check */
if (!strcmp (sysinbox (),stream->mailbox)) {
stream->silent = silent;
return NIL;
}
mm_critical (stream); /* go critical */
stat (sysinbox (),&sbuf); /* see if anything there */
/* can get sysinbox mailbox? */
if (sbuf.st_size && (sysibx = mail_open (sysibx,sysinbox (),OP_SILENT))
&& (!sysibx->rdonly) && (r = sysibx->nmsgs)) {
for (i = 1; i <= r; ++i) {/* for each message in sysinbox mailbox */
/* build file name we will use */
sprintf (LOCAL->buf,"%s/%lu",LOCAL->dir,++old);
/* snarf message from Berkeley mailbox */
selt = mail_elt (sysibx,i);
if (((fd = open (LOCAL->buf,O_WRONLY|O_CREAT|O_EXCL,
S_IREAD|S_IWRITE)) >= 0) &&
(s = mail_fetchheader_full (sysibx,i,NIL,&j,FT_PEEK)) &&
(write (fd,s,j) == j) &&
(s = mail_fetchtext_full (sysibx,i,&j,FT_PEEK)) &&
(write (fd,s,j) == j) && !fsync (fd) && !close (fd)) {
/* swell the cache */
mail_exists (stream,++nmsgs);
stream->uid_last = /* create new elt, note its file number */
(elt = mail_elt (stream,nmsgs))->private.uid = old;
recent++; /* bump recent count */
/* set up initial flags and date */
elt->valid = elt->recent = T;
elt->seen = selt->seen;
elt->deleted = selt->deleted;
elt->flagged = selt->flagged;
elt->answered = selt->answered;
elt->draft = selt->draft;
elt->day = selt->day;elt->month = selt->month;elt->year = selt->year;
elt->hours = selt->hours;elt->minutes = selt->minutes;
elt->seconds = selt->seconds;
elt->zhours = selt->zhours; elt->zminutes = selt->zminutes;
elt->zoccident = selt->zoccident;
mx_setdate (LOCAL->buf,elt);
}
else { /* failed to snarf */
if (fd) { /* did it ever get opened? */
close (fd); /* close descriptor */
unlink (LOCAL->buf);/* flush this file */
}
stream->silent = silent;
return NIL; /* note that something is badly wrong */
}
sprintf (tmp,"%lu",i); /* delete it from the sysinbox */
mail_flag (sysibx,tmp,"\\Deleted",ST_SET);
}
stat (LOCAL->dir,&sbuf); /* update scan time */
LOCAL->scantime = sbuf.st_ctime;
mail_expunge (sysibx); /* now expunge all those messages */
}
if (sysibx) mail_close (sysibx);
mm_nocritical (stream); /* release critical */
}
mx_unlockindex (stream); /* done with index */
stream->silent = silent; /* can pass up events now */
mail_exists (stream,nmsgs); /* notify upper level of mailbox size */
mail_recent (stream,recent);
return T; /* return that we are alive */
}
/* MX mail check mailbox
* Accepts: MAIL stream
*/
void mx_check (MAILSTREAM *stream)
{
if (mx_ping (stream)) mm_log ("Check completed",(long) NIL);
}
/* MX mail expunge mailbox
* Accepts: MAIL stream
*/
void mx_expunge (MAILSTREAM *stream)
{
MESSAGECACHE *elt;
unsigned long j;
unsigned long i = 1;
unsigned long n = 0;
unsigned long recent = stream->recent;
if (mx_lockindex (stream)) { /* lock the index */
mm_critical (stream); /* go critical */
while (i <= stream->nmsgs) {/* for each message */
/* if deleted, need to trash it */
if ((elt = mail_elt (stream,i))->deleted) {
sprintf (LOCAL->buf,"%s/%lu",LOCAL->dir,elt->private.uid);
if (unlink (LOCAL->buf)) {/* try to delete the message */
sprintf (LOCAL->buf,"Expunge of message %ld failed, aborted: %s",i,
strerror (errno));
mm_log (LOCAL->buf,(long) NIL);
break;
}
mail_gc_msg (&elt->private.msg,GC_ENV | GC_TEXTS);
if(elt->recent)--recent;/* if recent, note one less recent message */
mail_expunged(stream,i);/* notify upper levels */
n++; /* count up one more expunged message */
}
else i++; /* otherwise try next message */
}
if (n) { /* output the news if any expunged */
sprintf (LOCAL->buf,"Expunged %ld messages",n);
mm_log (LOCAL->buf,(long) NIL);
}
else mm_log ("No messages deleted, so no update needed",(long) NIL);
mm_nocritical (stream); /* release critical */
mx_unlockindex (stream); /* finished with index */
}
/* notify upper level of new mailbox size */
mail_exists (stream,stream->nmsgs);
mail_recent (stream,recent);
}
/* MX mail copy message(s)
* Accepts: MAIL stream
* sequence
* destination mailbox
* copy options
* Returns: T if copy successful, else NIL
*/
long mx_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options)
{
STRING st;
MESSAGECACHE *elt;
struct stat sbuf;
int fd;
unsigned long i,j;
char *t,flags[MAILTMPLEN],date[MAILTMPLEN];
/* copy the messages */
if ((options & CP_UID) ? mail_uid_sequence (stream,sequence) :
mail_sequence (stream,sequence))
for (i = 1; i <= stream->nmsgs; i++)
if ((elt = mail_elt (stream,i))->sequence) {
if ((fd = open (mx_fast_work (stream,elt),O_RDONLY,NIL))<0) return NIL;
fstat (fd,&sbuf); /* get size of message */
/* is buffer big enough? */
if (sbuf.st_size > LOCAL->buflen) {
fs_give ((void **) &LOCAL->buf);
LOCAL->buf = (char *) fs_get ((LOCAL->buflen = sbuf.st_size) + 1);
}
/* slurp message */
read (fd,LOCAL->buf,sbuf.st_size);
/* tie off file */
LOCAL->buf[sbuf.st_size] = '\0';
close (fd); /* flush message file */
INIT (&st,mail_string,(void *) LOCAL->buf,sbuf.st_size);
flags[0] = '\0'; /* init flag string */
if (j = elt->user_flags) do
if (t = stream->user_flags[find_rightmost_bit (&j)])
strcat (strcat (flags," "),t);
while (j);
if (elt->seen) strcat (flags," \\Seen");
if (elt->deleted) strcat (flags," \\Deleted");
if (elt->flagged) strcat (flags," \\Flagged");
if (elt->answered) strcat (flags," \\Answered");
if (elt->draft) strcat (flags," \\Draft");
flags[0] = '('; /* open list */
strcat (flags,")"); /* close list */
mail_date (date,elt); /* generate internal date */
if (!mail_append_full (stream,mailbox,flags,date,&st)) return NIL;
if (options & CP_MOVE) elt->deleted = T;
}
return T; /* return success */
}
/* MX mail append message from stringstruct
* Accepts: MAIL stream
* destination mailbox
* stringstruct of messages to append
* Returns: T if append successful, else NIL
*/
long mx_append (MAILSTREAM *stream,char *mailbox,char *flags,char *date,
STRING *message)
{
MESSAGECACHE *elt,selt;
MAILSTREAM *astream;
struct stat sbuf;
int fd,ifd;
char c,*s,*t,tmp[MAILTMPLEN];
long f;
long i = 0;
long size = SIZE (message);
long ret = LONGT;
unsigned long uf,j;
if (date) { /* want to preserve date? */
/* yes, parse date into an elt */
if (!mail_parse_date (&selt,date)) {
sprintf (tmp,"Bad date in append: %.80s",date);
mm_log (tmp,ERROR);
return NIL;
}
}
/* N.B.: can't use LOCAL->buf for tmp */
/* make sure valid mailbox */
if (!mx_isvalid (mailbox,tmp)) switch (errno) {
case ENOENT: /* no such file? */
if (((mailbox[0] == 'I') || (mailbox[0] == 'i')) &&
((mailbox[1] == 'N') || (mailbox[1] == 'n')) &&
((mailbox[2] == 'B') || (mailbox[2] == 'b')) &&
((mailbox[3] == 'O') || (mailbox[3] == 'o')) &&
((mailbox[4] == 'X') || (mailbox[4] == 'x')) && !mailbox[5])
mx_create (NIL,"INBOX");
else {
mm_notify (stream,"[TRYCREATE] Must create mailbox before append",NIL);
return NIL;
}
/* falls through */
case 0: /* merely empty file? */
break;
case EINVAL:
sprintf (tmp,"Invalid MX-format mailbox name: %.80s",mailbox);
mm_log (tmp,ERROR);
return NIL;
default:
sprintf (tmp,"Not a MX-format mailbox: %.80s",mailbox);
mm_log (tmp,ERROR);
return NIL;
}
if (!(astream = mail_open (NIL,mailbox,OP_SILENT))) {
sprintf (tmp,"Can't open append mailbox: %s",strerror (errno));
mm_log (tmp,ERROR);
return NIL;
}
/* parse flags */
f = mail_parse_flags (astream,flags,&uf);
if (mx_lockindex (astream)) { /* lock the index */
mx_file (tmp,mailbox); /* make message name */
sprintf (tmp + strlen (tmp),"/%lu",++astream->uid_last);
if ((fd = open (tmp,O_WRONLY|O_CREAT|O_EXCL,S_IREAD|S_IWRITE)) < 0) {
sprintf (tmp,"Can't create append message: %s",strerror (errno));
mm_log (tmp,ERROR);
return NIL;
}
s = (char *) fs_get (size); /* copy message */
for (i = 0; i < size; s[i++] = SNX (message));
mm_critical (stream); /* go critical */
/* write the data */
if ((write (fd,s,size) < 0) || fsync (fd)) {
unlink (tmp); /* delete mailbox */
sprintf (tmp,"Message append failed: %s",strerror (errno));
mm_log (tmp,ERROR);
ret = NIL;
}
close (fd); /* close the file */
/* set the date for this message */
if (date) mx_setdate (tmp,&selt);
/* copy flags */
(elt = mail_elt (astream,++astream->nmsgs))->private.uid =
astream->uid_last;
if (f&fSEEN) elt->seen = T;
if (f&fDELETED) elt->deleted = T;
if (f&fFLAGGED) elt->flagged = T;
if (f&fANSWERED) elt->answered = T;
if (f&fDRAFT) elt->draft = T;
elt->user_flags |= uf;
mx_unlockindex (astream); /* unlock index */
}
else {
mm_log ("Message append failed: unable to lock index",ERROR);
ret = NIL;
}
mm_nocritical (stream); /* release critical */
fs_give ((void **) &s); /* flush the buffer */
mail_close (astream);
return ret;
}
/* Internal routines */
/* MX file name selection test
* Accepts: candidate directory entry
* Returns: T to use file name, NIL to skip it
*/
int mx_select (struct direct *name)
{
char c;
char *s = name->d_name;
while (c = *s++) if (!isdigit (c)) return NIL;
return T;
}
/* MX file name comparision
* Accepts: first candidate directory entry
* second candidate directory entry
* Returns: negative if d1 < d2, 0 if d1 == d2, postive if d1 > d2
*/
int mx_numsort (const void *d1,const void *d2)
{
return atoi ((*(struct direct **) d1)->d_name) -
atoi ((*(struct direct **) d2)->d_name);
}
/* MX mail build file name
* Accepts: destination string
* source
* Returns: destination
*/
char *mx_file (char *dst,char *name)
{
if (!(mailboxfile (dst,name) && *dst)) sprintf (dst,"%s/INBOX",myhomedir ());
return dst;
}
/* MX read and lock index
* Accepts: MAIL stream
* Returns: T if success, NIL if failure
*/
long mx_lockindex (MAILSTREAM *stream)
{
unsigned long uf,sf,uid;
int k = 0;
unsigned long msgno = 1;
struct stat sbuf;
char *s,*t,*idx,tmp[MAILTMPLEN];
MESSAGECACHE *elt;
if ((LOCAL->fd < 0) && /* get index file, no-op if already have it */
(LOCAL->fd = open (strcat (strcpy (tmp,LOCAL->dir),MXINDEXNAME),
O_RDWR|O_CREAT,S_IREAD|S_IWRITE)) >= 0) {
flock (LOCAL->fd,LOCK_EX); /* get exclusive lock */
fstat (LOCAL->fd,&sbuf); /* get size of index */
/* slurp index */
read (LOCAL->fd,s = idx = (char *) fs_get (sbuf.st_size + 1),sbuf.st_size);
idx[sbuf.st_size] = '\0'; /* tie off index */
/* parse index */
if (sbuf.st_size) while (s && *s) switch (*s) {
case 'V': /* UID validity record */
stream->uid_validity = strtoul (s+1,&s,16);
break;
case 'L': /* UID last record */
stream->uid_last = strtoul (s+1,&s,16);
break;
case 'K': /* keyword */
/* find end of keyword */
if (s = strchr (t = ++s,'\n')) {
*s++ = '\0'; /* tie off keyword */
/* copy keyword */
if ((k < NUSERFLAGS) && !stream->user_flags[k])
stream->user_flags[k] = cpystr (t);
k++; /* one more keyword */
}
break;
case 'M': /* message status record */
uid = strtoul (s+1,&s,16);/* get UID for this message */
if (*s == ';') { /* get user flags */
uf = strtoul (s+1,&s,16);
if (*s == '.') { /* get system flags */
sf = strtoul (s+1,&s,16);
while ((msgno <= stream->nmsgs) && (mail_uid (stream,msgno) < uid))
msgno++; /* find message number for this UID */
if ((msgno <= stream->nmsgs) && (mail_uid (stream,msgno) == uid)) {
(elt = mail_elt (stream,msgno))->valid = T;
elt->user_flags=uf; /* set user and system flags in elt */
if (sf & fSEEN) elt->seen = T;
if (sf & fDELETED) elt->deleted = T;
if (sf & fFLAGGED) elt->flagged = T;
if (sf & fANSWERED) elt->answered = T;
if (sf & fDRAFT) elt->draft = T;
}
break;
}
}
default: /* bad news */
sprintf (tmp,"Error in index: %.80s",s);
mm_log (tmp,ERROR);
*s = NIL; /* ignore remainder of index */
}
else { /* new index */
stream->uid_validity = time (0);
user_flags (stream); /* init stream with default user flags */
}
fs_give ((void **) &idx); /* flush index */
}
return (LOCAL->fd >= 0) ? T : NIL;
}
/* MX write and unlock index
* Accepts: MAIL stream
*/
void mx_unlockindex (MAILSTREAM *stream)
{
unsigned long i;
off_t size = 0;
char *s,tmp[MAILTMPLEN + 64];
MESSAGECACHE *elt;
if (LOCAL->fd >= 0) {
lseek (LOCAL->fd,0,L_SET); /* rewind file */
/* write header */
sprintf (s = tmp,"V%08lxL%08lx",stream->uid_validity,stream->uid_last);
for (i = 0; (i < NUSERFLAGS) && stream->user_flags[i]; ++i)
sprintf (s += strlen (s),"K%s\n",stream->user_flags[i]);
/* write messages */
for (i = 1; i <= stream->nmsgs; i++) {
/* filled buffer? */
if (((s += strlen (s)) - tmp) > MAILTMPLEN) {
write (LOCAL->fd,tmp,size += s - tmp);
*(s = tmp) = '\0'; /* dump out and restart buffer */
}
elt = mail_elt (stream,i);
sprintf (s,"M%08lx;%08lx.%04x",elt->private.uid,elt->user_flags,
(fSEEN * elt->seen) + (fDELETED * elt->deleted) +
(fFLAGGED * elt->flagged) + (fANSWERED * elt->answered) +
(fDRAFT * elt->draft));
}
/* write tail end of buffer */
if ((s += strlen (s)) != tmp) write (LOCAL->fd,tmp,size += s - tmp);
ftruncate (LOCAL->fd,size);
flock (LOCAL->fd,LOCK_UN); /* unlock the index */
close (LOCAL->fd); /* finished with file */
LOCAL->fd = -1; /* no index now */
}
}
/* Set date for message
* Accepts: file name
* elt containing date
*/
void mx_setdate (char *file,MESSAGECACHE *elt)
{
time_t tp[2];
tp[0] = time (0); /* atime is now */
tp[1] = mail_longdate (elt); /* modification time */
utime (file,tp); /* set the times */
}