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/* ========================================================================
* Copyright 1988-2008 University of Washington
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
*
* ========================================================================
*/
/*
* 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: 6 January 2008
*/
#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 "misc.h"
#include "dummy.h"
#include "fdstring.h"
/* Index file */
#define MXINDEXNAME "/.mxindex"
#define MXINDEX(d,s) strcat (mx_file (d,s),MXINDEXNAME)
/* MX I/O stream local data */
typedef struct mx_local {
int fd; /* file descriptor of open index */
unsigned char *buf; /* temporary buffer */
unsigned long buflen; /* current size of temporary buffer */
unsigned long cachedtexts; /* total size of all cached texts */
time_t scantime; /* last time directory scanned */
} MXLOCAL;
/* Convenient access to local data */
#define LOCAL ((MXLOCAL *) stream->local)
/* Function prototypes */
DRIVER *mx_valid (char *name);
int mx_isvalid (char *name,char *tmp);
int mx_namevalid (char *name);
void *mx_parameters (long function,void *value);
long mx_dirfmttest (char *name);
void mx_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents);
long mx_scan_contents (char *name,char *contents,unsigned long csiz,
unsigned long fsiz);
void mx_list (MAILSTREAM *stream,char *ref,char *pat);
void mx_lsub (MAILSTREAM *stream,char *ref,char *pat);
long mx_subscribe (MAILSTREAM *stream,char *mailbox);
long mx_unsubscribe (MAILSTREAM *stream,char *mailbox);
long mx_create (MAILSTREAM *stream,char *mailbox);
long mx_delete (MAILSTREAM *stream,char *mailbox);
long mx_rename (MAILSTREAM *stream,char *old,char *newname);
int mx_rename_work (char *src,size_t srcl,char *dst,size_t dstl,char *name);
MAILSTREAM *mx_open (MAILSTREAM *stream);
void mx_close (MAILSTREAM *stream,long options);
void mx_fast (MAILSTREAM *stream,char *sequence,long flags);
char *mx_fast_work (MAILSTREAM *stream,MESSAGECACHE *elt);
char *mx_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *length,
long flags);
long mx_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags);
void mx_flag (MAILSTREAM *stream,char *sequence,char *flag,long flags);
void mx_flagmsg (MAILSTREAM *stream,MESSAGECACHE *elt);
long mx_ping (MAILSTREAM *stream);
void mx_check (MAILSTREAM *stream);
long mx_expunge (MAILSTREAM *stream,char *sequence,long options);
long mx_copy (MAILSTREAM *stream,char *sequence,char *mailbox,
long options);
long mx_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data);
long mx_append_msg (MAILSTREAM *stream,char *flags,MESSAGECACHE *elt,
STRING *st,SEARCHSET *set);
int mx_select (struct direct *name);
int mx_numsort (const void *d1,const void *d2);
char *mx_file (char *dst,char *name);
long mx_lockindex (MAILSTREAM *stream);
void mx_unlockindex (MAILSTREAM *stream);
void mx_setdate (char *file,MESSAGECACHE *elt);
/* MX mail routines */
/* Driver dispatch used by MAIL */
DRIVER mxdriver = {
"mx", /* driver name */
/* driver flags */
DR_MAIL|DR_LOCAL|DR_NOFAST|DR_CRLF|DR_LOCKING|DR_DIRFMT,
(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 */
mail_status_default, /* 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 with errno holding dir stat error
*/
int mx_isvalid (char *name,char *tmp)
{
struct stat sbuf;
errno = NIL; /* zap error */
if ((strlen (name) <= NETMAXMBX) && *mx_file (tmp,name) &&
!stat (tmp,&sbuf) && ((sbuf.st_mode & S_IFMT) == S_IFDIR)) {
/* name is directory; is it mx? */
if (!stat (MXINDEX (tmp,name),&sbuf) &&
((sbuf.st_mode & S_IFMT) == S_IFREG)) return T;
errno = NIL; /* directory but not mx */
}
else if (!compare_cstring (name,"INBOX")) errno = NIL;
return NIL;
}
/* MX mail test for valid mailbox
* Accepts: mailbox name
* Returns: T if valid, NIL otherwise
*/
int mx_namevalid (char *name)
{
char *s = (*name == '/') ? name + 1 : name;
while (s && *s) { /* make sure valid name */
if (isdigit (*s)) s++; /* digit, check this node further... */
else if (*s == '/') break; /* all digit node, barf */
/* non-digit, skip to next node or return */
else if (!((s = strchr (s+1,'/')) && *++s)) return T;
}
return NIL; /* all numeric or empty node */
}
/* MX manipulate driver parameters
* Accepts: function code
* function-dependent value
* Returns: function-dependent return value
*/
void *mx_parameters (long function,void *value)
{
void *ret = NIL;
switch ((int) function) {
case GET_INBOXPATH:
if (value) ret = mailboxfile ((char *) value,"~/INBOX");
break;
case GET_DIRFMTTEST:
ret = (void *) mx_dirfmttest;
break;
case GET_SCANCONTENTS:
ret = (void *) mx_scan_contents;
break;
}
return ret;
}
/* MX test for directory format internal node
* Accepts: candidate node name
* Returns: T if internal name, NIL otherwise
*/
long mx_dirfmttest (char *name)
{
int c;
/* success if index name or all-numberic */
if (strcmp (name,MXINDEXNAME+1))
while (c = *name++) if (!isdigit (c)) return NIL;
return LONGT;
}
/* 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) dummy_scan (NIL,ref,pat,contents);
}
/* MX scan mailbox for contents
* Accepts: mailbox name
* desired contents
* contents size
* file size (ignored)
* Returns: NIL if contents not found, T if found
*/
long mx_scan_contents (char *name,char *contents,unsigned long csiz,
unsigned long fsiz)
{
long i,nfiles;
void *a;
char *s;
long ret = NIL;
size_t namelen = strlen (name);
struct stat sbuf;
struct direct **names = NIL;
if ((nfiles = scandir (name,&names,mx_select,mx_numsort)) > 0)
for (i = 0; i < nfiles; ++i) {
if (!ret) {
sprintf (s = (char *) fs_get (namelen + strlen (names[i]->d_name) + 2),
"%s/%s",name,names[i]->d_name);
if (!stat (s,&sbuf) && (csiz <= sbuf.st_size))
ret = dummy_scan_contents (s,contents,csiz,sbuf.st_size);
fs_give ((void **) &s);
}
fs_give ((void **) &names[i]);
}
/* free directory list */
if (a = (void *) names) fs_give ((void **) &a);
return ret;
}
/* MX list mailboxes
* Accepts: mail stream
* reference
* pattern to search
*/
void mx_list (MAILSTREAM *stream,char *ref,char *pat)
{
if (stream) dummy_list (NIL,ref,pat);
}
/* 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 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)
{
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)
{
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)
{
DRIVER *test;
int fd;
char *s,tmp[MAILTMPLEN];
int mask = umask (0);
long ret = NIL;
if (!mx_namevalid (mailbox)) /* validate name */
sprintf (tmp,"Can't create mailbox %.80s: invalid MX-format name",mailbox);
/* must not already exist */
else if ((test = mail_valid (NIL,mailbox,NIL)) &&
strcmp (test->name,"dummy"))
sprintf (tmp,"Can't create mailbox %.80s: mailbox already exists",mailbox);
/* create directory */
else if (!dummy_create_path (stream,MXINDEX (tmp,mailbox),
get_dir_protection (mailbox)))
sprintf (tmp,"Can't create mailbox %.80s: %s",mailbox,strerror (errno));
else { /* success */
/* set index protection */
set_mbx_protections (mailbox,tmp);
/* tie off directory name */
*(s = strrchr (tmp,'/') + 1) = '\0';
/* set directory protection */
set_mbx_protections (mailbox,tmp);
ret = LONGT;
}
umask (mask); /* restore mask */
if (!ret) MM_LOG (tmp,ERROR); /* some error */
return ret;
}
/* 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 */
*(s = strrchr (tmp,'/')) = '\0';
if (rmdir (tmp)) { /* try to remove the directory */
sprintf (tmp,"Can't delete name %.80s: %s",mailbox,strerror (errno));
MM_LOG (tmp,WARN);
}
}
return T; /* always success */
}
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);
else if (!mx_namevalid (newname))
sprintf (tmp,"Can't rename to mailbox %.80s: invalid MX-format name",
newname);
/* 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);
else {
mx_file (tmp,old); /* build old directory name */
mx_file (tmp1,newname); /* and new directory name */
/* easy if not INBOX */
if (compare_cstring (old,"INBOX")) {
/* 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_path (stream,tmp1,get_dir_protection (newname)))
return NIL;
*s = c; /* restore full name */
}
if (!rename (tmp,tmp1)) return LONGT;
}
/* RFC 3501 requires this */
else if (dummy_create_path (stream,strcat (tmp1,"/"),
get_dir_protection (newname))) {
void *a;
int i,n,lasterror;
struct direct **names = NIL;
size_t srcl = strlen (tmp);
size_t dstl = strlen (tmp1);
/* rename each mx file to new directory */
for (i = lasterror = 0,n = scandir (tmp,&names,mx_select,mx_numsort);
i < n; ++i) {
if (mx_rename_work (tmp,srcl,tmp1,dstl,names[i]->d_name))
lasterror = errno;
fs_give ((void **) &names[i]);
}
/* free directory list */
if (a = (void *) names) fs_give ((void **) &a);
if (lasterror || mx_rename_work (tmp,srcl,tmp1,dstl,MXINDEXNAME+1))
errno = lasterror;
else return mx_create (NIL,"INBOX");
}
sprintf (tmp,"Can't rename mailbox %.80s to %.80s: %s",
old,newname,strerror (errno));
}
MM_LOG (tmp,ERROR); /* something failed */
return NIL;
}
/* MX rename worker routine
* Accepts: source directory name
* source directory name length
* destination directory name
* destination directory name length
* name of node to move
* Returns: zero if success, non-zero if error
*/
int mx_rename_work (char *src,size_t srcl,char *dst,size_t dstl,char *name)
{
int ret;
size_t len = strlen (name);
char *s = (char *) fs_get (srcl + len + 2);
char *d = (char *) fs_get (dstl + len + 1);
sprintf (s,"%s/%s",src,name);
sprintf (d,"%s%s",dst,name);
ret = rename (s,d);
fs_give ((void **) &s);
fs_give ((void **) &d);
return ret;
}
/* MX mail open
* Accepts: stream to open
* Returns: stream on success, NIL on failure
*/
MAILSTREAM *mx_open (MAILSTREAM *stream)
{
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 */
stream->inbox = !compare_cstring (stream->mailbox,"INBOX");
mx_file (tmp,stream->mailbox);/* get directory name */
/* canonicalize mailbox name */
fs_give ((void **) &stream->mailbox);
stream->mailbox = cpystr (tmp);
/* make temporary buffer */
LOCAL->buf = (char *) fs_get (CHUNKSIZE);
LOCAL->buflen = CHUNKSIZE - 1;
LOCAL->scantime = 0; /* not scanned yet */
LOCAL->fd = -1; /* no index yet */
LOCAL->cachedtexts = 0; /* no cached texts */
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,NIL,NIL);
/* 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",stream->mailbox,elt->private.uid);
/* have size yet? */
if (!elt->rfc822_size && !stat (LOCAL->buf,&sbuf)) {
/* 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 (char *) 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) {
/* purge cache if too big */
if (LOCAL->cachedtexts > max (stream->nmsgs * 4096,2097152)) {
mail_gc (stream,GC_TEXTS);/* just can't keep that much */
LOCAL->cachedtexts = 0;
}
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);
/* add to cached size */
LOCAL->cachedtexts += elt->rfc822_size;
}
*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 (stream->mailbox,&sbuf)) return NIL;
stream->silent = T; /* don't pass up exists events yet */
if (sbuf.st_ctime != LOCAL->scantime) {
struct direct **names = NIL;
long nfiles = scandir (stream->mailbox,&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 (s = (void *) names) fs_give ((void **) &s);
}
stream->nmsgs = nmsgs; /* don't upset mail_uid() */
/* if INBOX, snarf from system INBOX */
if (mx_lockindex (stream) && stream->inbox &&
!strcmp (sysinbox (),stream->mailbox)) {
old = stream->uid_last;
MM_CRITICAL (stream); /* go critical */
/* see if anything in system inbox */
if (!stat (sysinbox (),&sbuf) && 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",stream->mailbox,++old);
/* snarf message from Berkeley mailbox */
selt = mail_elt (sysibx,i);
if (((fd = open (LOCAL->buf,O_WRONLY|O_CREAT|O_EXCL,
(long) mail_parameters (NIL,GET_MBXPROTECTION,NIL)))
>= 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);
sprintf (tmp,"%lu",i);/* delete it from the sysinbox */
mail_flag (sysibx,tmp,"\\Deleted",ST_SET);
}
else { /* failed to snarf */
if (fd) { /* did it ever get opened? */
close (fd); /* close descriptor */
unlink (LOCAL->buf);/* flush this file */
}
sprintf (tmp,"Message copy to MX mailbox failed: %.80s",
s,strerror (errno));
MM_LOG (tmp,ERROR);
r = 0; /* stop the snarf in its tracks */
}
}
/* update scan time */
if (!stat (stream->mailbox,&sbuf)) 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
* sequence to expunge if non-NIL
* expunge options
* Returns: T, always
*/
long mx_expunge (MAILSTREAM *stream,char *sequence,long options)
{
long ret;
MESSAGECACHE *elt;
unsigned long i = 1;
unsigned long n = 0;
unsigned long recent = stream->recent;
if (ret = (sequence ? ((options & EX_UID) ?
mail_uid_sequence (stream,sequence) :
mail_sequence (stream,sequence)) : LONGT) &&
mx_lockindex (stream)) { /* lock the index */
MM_CRITICAL (stream); /* go critical */
while (i <= stream->nmsgs) {/* for each message */
elt = mail_elt (stream,i);/* if deleted, need to trash it */
if (elt->deleted && (sequence ? elt->sequence : T)) {
sprintf (LOCAL->buf,"%s/%lu",stream->mailbox,elt->private.uid);
if (unlink (LOCAL->buf)) {/* try to delete the message */
sprintf (LOCAL->buf,"Expunge of message %lu failed, aborted: %s",i,
strerror (errno));
MM_LOG (LOCAL->buf,(long) NIL);
break;
}
/* note uncached */
LOCAL->cachedtexts -= ((elt->private.msg.header.text.data ?
elt->private.msg.header.text.size : 0) +
(elt->private.msg.text.text.data ?
elt->private.msg.text.text.size : 0));
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 %lu 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);
}
return ret;
}
/* 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)
{
FDDATA d;
STRING st;
MESSAGECACHE *elt;
MAILSTREAM *astream;
struct stat sbuf;
int fd;
unsigned long i,j,uid,uidv;
char *t,tmp[MAILTMPLEN];
long ret;
mailproxycopy_t pc =
(mailproxycopy_t) mail_parameters (stream,GET_MAILPROXYCOPY,NIL);
/* make sure valid mailbox */
if (!mx_valid (mailbox)) switch (errno) {
case NIL: /* no error in stat() */
if (pc) return (*pc) (stream,sequence,mailbox,options);
sprintf (LOCAL->buf,"Not a MX-format mailbox: %.80s",mailbox);
MM_LOG (LOCAL->buf,ERROR);
return NIL;
default: /* some stat() error */
MM_NOTIFY (stream,"[TRYCREATE] Must create mailbox before copy",NIL);
return NIL;
}
/* copy the messages */
if (!(ret = ((options & CP_UID) ? mail_uid_sequence (stream,sequence) :
mail_sequence (stream,sequence))));
/* acquire stream to append to */
else if (!(astream = mail_open (NIL,mailbox,OP_SILENT))) {
MM_LOG ("Can't open copy mailbox",ERROR);
ret = NIL;
}
else {
MM_CRITICAL (stream); /* go critical */
if (!(ret = mx_lockindex (astream)))
MM_LOG ("Message copy failed: unable to lock index",ERROR);
else {
copyuid_t cu = (copyuid_t) mail_parameters (NIL,GET_COPYUID,NIL);
SEARCHSET *source = cu ? mail_newsearchset () : NIL;
SEARCHSET *dest = cu ? mail_newsearchset () : NIL;
for (i = 1,uid = uidv = 0; ret && (i <= stream->nmsgs); i++)
if ((elt = mail_elt (stream,i))->sequence) {
if (ret = ((fd = open (mx_fast_work (stream,elt),O_RDONLY,NIL))
>= 0)) {
fstat (fd,&sbuf); /* get size of message */
d.fd = fd; /* set up file descriptor */
d.pos = 0; /* start of file */
d.chunk = LOCAL->buf;
d.chunksize = CHUNKSIZE;
INIT (&st,fd_string,&d,sbuf.st_size);
/* init flag string */
tmp[0] = tmp[1] = '\0';
if (j = elt->user_flags) do
if (t = stream->user_flags[find_rightmost_bit (&j)])
strcat (strcat (tmp," "),t);
while (j);
if (elt->seen) strcat (tmp," \\Seen");
if (elt->deleted) strcat (tmp," \\Deleted");
if (elt->flagged) strcat (tmp," \\Flagged");
if (elt->answered) strcat (tmp," \\Answered");
if (elt->draft) strcat (tmp," \\Draft");
tmp[0] = '('; /* open list */
strcat (tmp,")"); /* close list */
if (ret = mx_append_msg (astream,tmp,elt,&st,dest)) {
/* add to source set if needed */
if (source) mail_append_set (source,mail_uid (stream,i));
/* delete if doing a move */
if (options & CP_MOVE) elt->deleted = T;
}
}
}
/* return sets if doing COPYUID */
if (cu && ret) (*cu) (stream,mailbox,astream->uid_validity,source,dest);
else { /* flush any sets we may have built */
mail_free_searchset (&source);
mail_free_searchset (&dest);
}
mx_unlockindex (astream); /* unlock index */
}
MM_NOCRITICAL (stream);
mail_close (astream); /* finished with append stream */
}
return ret; /* return success */
}
/* MX mail append message from stringstruct
* Accepts: MAIL stream
* destination mailbox
* append callback
* data for callback
* Returns: T if append successful, else NIL
*/
long mx_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data)
{
MESSAGECACHE elt;
MAILSTREAM *astream;
char *flags,*date,tmp[MAILTMPLEN];
STRING *message;
long ret = LONGT;
/* default stream to prototype */
if (!stream) stream = user_flags (&mxproto);
/* 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 (!compare_cstring (mailbox,"INBOX")) 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;
}
/* get first message */
if (!MM_APPEND (af) (stream,data,&flags,&date,&message)) return NIL;
if (!(astream = mail_open (NIL,mailbox,OP_SILENT))) {
MM_LOG ("Can't open append mailbox",ERROR);
return NIL;
}
MM_CRITICAL (astream); /* go critical */
/* lock the index */
if (!(ret = mx_lockindex (astream)))
MM_LOG ("Message append failed: unable to lock index",ERROR);
else {
appenduid_t au = (appenduid_t) mail_parameters (NIL,GET_APPENDUID,NIL);
SEARCHSET *dst = au ? mail_newsearchset () : NIL;
do {
/* guard against zero-length */
if (!(ret = SIZE (message)))
MM_LOG ("Append of zero-length message",ERROR);
else if (date && !(ret = mail_parse_date (&elt,date))) {
sprintf (tmp,"Bad date in append: %.80s",date);
MM_LOG (tmp,ERROR);
}
else ret = mx_append_msg (astream,flags,date ? &elt : NIL,message,dst)&&
MM_APPEND (af) (stream,data,&flags,&date,&message);
} while (ret && message);
/* return sets if doing APPENDUID */
if (au && ret) (*au) (mailbox,astream->uid_validity,dst);
else mail_free_searchset (&dst);
mx_unlockindex (astream); /* unlock index */
}
MM_NOCRITICAL (astream); /* release critical */
mail_close (astream);
return ret;
}
/* MX mail append single message
* Accepts: MAIL stream
* flags for new message if non-NIL
* elt with source date if non-NIL
* stringstruct of message text
* searchset to place UID
* Returns: T if success, NIL if failure
*/
long mx_append_msg (MAILSTREAM *stream,char *flags,MESSAGECACHE *elt,
STRING *st,SEARCHSET *set)
{
char tmp[MAILTMPLEN];
int fd;
unsigned long uf;
long f = mail_parse_flags (stream,flags,&uf);
/* make message file name */
sprintf (tmp,"%s/%lu",stream->mailbox,++stream->uid_last);
if ((fd = open (tmp,O_WRONLY|O_CREAT|O_EXCL,
(long) mail_parameters (NIL,GET_MBXPROTECTION,NIL))) < 0) {
sprintf (tmp,"Can't create append message: %s",strerror (errno));
MM_LOG (tmp,ERROR);
return NIL;
}
while (SIZE (st)) { /* copy the file */
if (st->cursize && (write (fd,st->curpos,st->cursize) < 0)) {
unlink (tmp); /* delete file */
close (fd); /* close the file */
sprintf (tmp,"Message append failed: %s",strerror (errno));
MM_LOG (tmp,ERROR);
return NIL;
}
SETPOS (st,GETPOS (st) + st->cursize);
}
close (fd); /* close the file */
if (elt) mx_setdate (tmp,elt);/* set file date */
/* swell the cache */
mail_exists (stream,++stream->nmsgs);
/* copy flags */
mail_append_set (set,(elt = mail_elt (stream,stream->nmsgs))->private.uid =
stream->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;
return LONGT;
}
/* 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)
{
char *s;
/* empty string if mailboxfile fails */
if (!mailboxfile (dst,name)) *dst = '\0';
/* driver-selected INBOX */
else if (!*dst) mailboxfile (dst,"~/INBOX");
/* tie off unnecessary trailing / */
else if ((s = strrchr (dst,'/')) && !s[1]) *s = '\0';
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[2*MAILTMPLEN];
MESSAGECACHE *elt;
blocknotify_t bn = (blocknotify_t) mail_parameters (NIL,GET_BLOCKNOTIFY,NIL);
if ((LOCAL->fd < 0) && /* get index file, no-op if already have it */
(LOCAL->fd = open (strcat (strcpy (tmp,stream->mailbox),MXINDEXNAME),
O_RDWR|O_CREAT,
(long) mail_parameters (NIL,GET_MBXPROTECTION,NIL)))
>= 0) {
(*bn) (BLOCK_FILELOCK,NIL);
flock (LOCAL->fd,LOCK_EX); /* get exclusive lock */
(*bn) (BLOCK_NONE,NIL);
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] &&
(strlen (t) <= MAXUSERFLAG)) 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
*/
#define MXIXBUFLEN 2048
void mx_unlockindex (MAILSTREAM *stream)
{
unsigned long i,j;
off_t size = 0;
char *s,tmp[MXIXBUFLEN + 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) > MXIXBUFLEN) {
write (LOCAL->fd,tmp,j = s - tmp);
size += j;
*(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,(unsigned)
((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,j = s - tmp);
size += j;
}
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 */
}
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