/*
* Program: MH 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: 23 February 1992
* Last Edited: 4 January 1996
*
* Copyright 1996 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 "mh.h"
#include "rfc822.h"
#include "misc.h"
#include "dummy.h"
/* MH mail routines */
/* Driver dispatch used by MAIL */
DRIVER mhdriver = {
"mh", /* driver name */
/* driver flags */
DR_MAIL|DR_LOCAL|DR_NOFAST|DR_NAMESPACE,
(DRIVER *) NIL, /* next driver */
mh_valid, /* mailbox is valid for us */
mh_parameters, /* manipulate parameters */
mh_scan, /* scan mailboxes */
mh_list, /* find mailboxes */
mh_lsub, /* find subscribed mailboxes */
mh_subscribe, /* subscribe to mailbox */
mh_unsubscribe, /* unsubscribe from mailbox */
mh_create, /* create mailbox */
mh_delete, /* delete mailbox */
mh_rename, /* rename mailbox */
NIL, /* status of mailbox */
mh_open, /* open mailbox */
mh_close, /* close mailbox */
mh_fetchfast, /* fetch message "fast" attributes */
mh_fetchflags, /* fetch message flags */
mh_fetchstructure, /* fetch message envelopes */
mh_fetchheader, /* fetch message header only */
mh_fetchtext, /* fetch message body only */
mh_fetchbody, /* fetch message body section */
NIL, /* unique identifier */
mh_setflag, /* set message flag */
mh_clearflag, /* clear message flag */
NIL, /* search for message based on criteria */
mh_ping, /* ping mailbox to see if still alive */
mh_check, /* check for new messages */
mh_expunge, /* expunge deleted messages */
mh_copy, /* copy messages to another mailbox */
mh_append, /* append string message to mailbox */
mh_gc /* garbage collect stream */
};
/* prototype stream */
MAILSTREAM mhproto = {&mhdriver};
/* MH mail validate mailbox
* Accepts: mailbox name
* Returns: our driver if name is valid, NIL otherwise
*/
DRIVER *mh_valid (char *name)
{
char tmp[MAILTMPLEN];
return mh_isvalid (name,tmp,T) ? &mhdriver : NIL;
}
/* MH mail test for valid mailbox
* Accepts: mailbox name
* temporary buffer to use
* syntax only test flag
* Returns: T if valid, NIL otherwise
*/
static char *mh_path = NIL; /* holds MH path name */
static long mh_once = 0; /* already through this code */
int mh_isvalid (char *name,char *tmp,long synonly)
{
struct stat sbuf;
if (!mh_path) { /* have MH path yet? */
char *s,*s1,*t,*v;
int fd;
if (mh_once++) return NIL; /* only do this code once */
sprintf (tmp,"%s/%s",myhomedir (),MHPROFILE);
if ((fd = open (tmp,O_RDONLY,NIL)) < 0) return NIL;
fstat (fd,&sbuf); /* yes, get size and read file */
read (fd,(s1 = t = (char *) fs_get (sbuf.st_size + 1)),sbuf.st_size);
close (fd); /* don't need the file any more */
t[sbuf.st_size] = '\0'; /* tie it off */
/* parse profile file */
while (*(s = t) && (t = strchr (s,'\n'))) {
*t++ = '\0'; /* tie off line */
if (v = strchr (s,' ')) { /* found space in line? */
*v = '\0'; /* tie off, is keyword "Path:"? */
if (!strcmp (lcase (s),"path:")) {
if (*++v == '/') s = v;
else sprintf (s = tmp,"%s/%s",myhomedir (),v);
mh_path = cpystr (s); /* copy name */
break; /* don't need to look at rest of file */
}
}
}
fs_give ((void **) &s1); /* flush profile text */
if (!mh_path) { /* default path if not in the profile */
sprintf (tmp,"%s/%s",myhomedir (),MHPATH);
mh_path = cpystr (tmp);
}
}
/* name must be #MHINBOX or #mh/... */
if (strcmp (ucase (strcpy (tmp,name)),"#MHINBOX") &&
!(tmp[0] == '#' && tmp[1] == 'M' && tmp[2] == 'H' && tmp[3] == '/')) {
errno = EINVAL; /* bogus name */
return NIL;
}
/* all done if syntax only check */
if (synonly && tmp[0] == '#') return T;
errno = NIL; /* zap error */
/* validate name as directory */
return ((stat (mh_file (tmp,name),&sbuf) == 0) &&
(sbuf.st_mode & S_IFMT) == S_IFDIR);
}
/* MH manipulate driver parameters
* Accepts: function code
* function-dependent value
* Returns: function-dependent return value
*/
void *mh_parameters (long function,void *value)
{
return NIL;
}
/* MH scan mailboxes
* Accepts: mail stream
* reference
* pattern to search
* string to scan
*/
void mh_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents)
{
char tmp[MAILTMPLEN];
if (mh_canonicalize (tmp,ref,pat))
mm_log ("Scan not valid for mh mailboxes",WARN);
}
/* MH list mailboxes
* Accepts: mail stream
* reference
* pattern to search
*/
void mh_list (MAILSTREAM *stream,char *ref,char *pat)
{
char *s,test[MAILTMPLEN],file[MAILTMPLEN];
long i = 0;
/* get canonical form of name */
if (mh_canonicalize (test,ref,pat)) {
if (test[3] == '/') { /* looking down levels? */
/* yes, found any wildcards? */
if (s = strpbrk (test,"%*")) {
/* yes, copy name up to that point */
strncpy (file,test+4,i = s - (test+4));
file[i] = '\0'; /* tie off */
}
else strcpy (file,test+4);/* 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 */
mh_list_work (stream,"#mh",s,test,0);
}
/* always an INBOX */
if (pmatch ("#MHINBOX",test))
mm_list (stream,NIL,"#MHINBOX",LATT_NOINFERIORS);
}
}
/* MH list subscribed mailboxes
* Accepts: mail stream
* reference
* pattern to search
*/
void mh_lsub (MAILSTREAM *stream,char *ref,char *pat)
{
void *sdb = NIL;
char *s,test[MAILTMPLEN];
/* get canonical form of name */
if (mh_canonicalize (test,ref,pat) && (s = sm_read (&sdb))) {
do if (pmatch_full (s,test,'/')) mm_lsub (stream,'/',s,NIL);
while (s = sm_read (&sdb)); /* until no more subscriptions */
}
}
/* MH list mailboxes worker routine
* Accepts: mail stream
* base directory
* directory name to search
* search pattern
* search level
*/
void mh_list_work (MAILSTREAM *stream,char *base,char *dir,char *pat,
long level)
{
DIR *dp;
struct direct *d;
struct stat sbuf;
char *cp,*np,curdir[MAILTMPLEN],name[MAILTMPLEN];
/* build MH name to search */
if (dir) sprintf (name,"%s/%s/",base,dir);
else sprintf (name,"%s/",base);
/* make directory name, punt if bogus */
if (!mh_file (curdir,name)) return;
cp = curdir + strlen (curdir);/* end of directory name */
np = name + strlen (name); /* end of MH name */
if (dp = opendir (curdir)) { /* open directory */
while (d = readdir (dp)) /* scan directory, ignore all . names */
if (d->d_name[0] != '.') {/* build file name */
strcpy (cp,d->d_name); /* make directory name */
if (!stat (curdir,&sbuf) && ((sbuf.st_mode &= S_IFMT) == S_IFDIR)) {
strcpy (np,d->d_name);/* make mh name of directory name */
/* yes, an MH name if full match */
if (pmatch_full (name,pat,'/')) mm_list (stream,'/',name,NIL);
/* check if should recurse */
if (dmatch (name,pat,'/') &&
(level < (long) mail_parameters (NIL,GET_LISTMAXLEVEL,NIL)))
mh_list_work (stream,base,curdir,pat,level+1);
}
}
closedir (dp); /* all done, flush directory */
}
}
/* MH mail subscribe to mailbox
* Accepts: mail stream
* mailbox to add to subscription list
* Returns: T on success, NIL on failure
*/
long mh_subscribe (MAILSTREAM *stream,char *mailbox)
{
char tmp[MAILTMPLEN];
return sm_subscribe (mailbox);
}
/* MH mail unsubscribe to mailbox
* Accepts: mail stream
* mailbox to delete from subscription list
* Returns: T on success, NIL on failure
*/
long mh_unsubscribe (MAILSTREAM *stream,char *mailbox)
{
char tmp[MAILTMPLEN];
return sm_unsubscribe (mailbox);
}
/* MH mail create mailbox
* Accepts: mail stream
* mailbox name to create
* Returns: T on success, NIL on failure
*/
long mh_create (MAILSTREAM *stream,char *mailbox)
{
char tmp[MAILTMPLEN];
if (!(mailbox[0] == '#' && (mailbox[1] == 'm' || mailbox[1] == 'M') &&
(mailbox[2] == 'h' || mailbox[2] == 'H') && mailbox[3] == '/')) {
sprintf (tmp,"Can't create mailbox %s: invalid MH-format name",mailbox);
mm_log (tmp,ERROR);
return NIL;
}
/* must not already exist */
if (mh_isvalid (mailbox,tmp,NIL)) {
sprintf (tmp,"Can't create mailbox %s: mailbox already exists",mailbox);
mm_log (tmp,ERROR);
return NIL;
}
if (!mh_path) return NIL; /* sorry */
sprintf (tmp,"%s/%s",mh_path,mailbox + 4);
if (mkdir (tmp,0700)) { /* try to make it */
sprintf (tmp,"Can't create mailbox %s: %s",mailbox,strerror (errno));
mm_log (tmp,ERROR);
return NIL;
}
return T; /* return success */
}
/* MH mail delete mailbox
* mailbox name to delete
* Returns: T on success, NIL on failure
*/
long mh_delete (MAILSTREAM *stream,char *mailbox)
{
DIR *dirp;
struct direct *d;
int i;
char tmp[MAILTMPLEN];
if (!(mailbox[0] == '#' && (mailbox[1] == 'm' || mailbox[1] == 'M') &&
(mailbox[2] == 'h' || mailbox[2] == 'H') && mailbox[3] == '/')) {
sprintf (tmp,"Can't delete mailbox %s: invalid MH-format name",mailbox);
mm_log (tmp,ERROR);
return NIL;
}
/* is mailbox valid? */
if (!mh_isvalid (mailbox,tmp,NIL)){
sprintf (tmp,"Can't delete mailbox %s: no such mailbox",mailbox);
mm_log (tmp,ERROR);
return NIL;
}
/* get name of directory */
i = strlen (mh_file (tmp,mailbox));
if (dirp = opendir (tmp)) { /* open directory */
tmp[i++] = '/'; /* now apply trailing delimiter */
while (d = readdir (dirp)) /* massacre all numeric or comma files */
if (mh_select (d) || *d->d_name == ',') {
strcpy (tmp + i,d->d_name);
unlink (tmp); /* sayonara */
}
closedir (dirp); /* flush directory */
}
/* try to remove the directory */
if (rmdir (mh_file (tmp,mailbox))) {
sprintf (tmp,"Can't delete mailbox %s: %s",mailbox,strerror (errno));
mm_log (tmp,ERROR);
return NIL;
}
return T; /* return success */
}
/* MH mail rename mailbox
* Accepts: MH mail stream
* old mailbox name
* new mailbox name
* Returns: T on success, NIL on failure
*/
long mh_rename (MAILSTREAM *stream,char *old,char *newname)
{
char tmp[MAILTMPLEN],tmp1[MAILTMPLEN];
if (!(old[0] == '#' && (old[1] == 'm' || old[1] == 'M') &&
(old[2] == 'h' || old[2] == 'H') && old[3] == '/')) {
sprintf (tmp,"Can't delete mailbox %s: invalid MH-format name",old);
mm_log (tmp,ERROR);
return NIL;
}
/* old mailbox name must be valid */
if (!mh_isvalid (old,tmp,NIL)) {
sprintf (tmp,"Can't rename mailbox %s: no such mailbox",old);
mm_log (tmp,ERROR);
return NIL;
}
if (!(newname[0] == '#' && (newname[1] == 'm' || newname[1] == 'M') &&
(newname[2] == 'h' || newname[2] == 'H') && newname[3] == '/')) {
sprintf (tmp,"Can't rename to mailbox %s: invalid MH-format name",newname);
mm_log (tmp,ERROR);
return NIL;
}
/* new mailbox name must not be valid */
if (mh_isvalid (newname,tmp,NIL)) {
sprintf (tmp,"Can't rename to mailbox %s: destination already exists",
newname);
mm_log (tmp,ERROR);
return NIL;
}
/* try to rename the directory */
if (rename (mh_file (tmp,old),mh_file (tmp1,newname))) {
sprintf (tmp,"Can't rename mailbox %s to %s: %s",old,newname,
strerror (errno));
mm_log (tmp,ERROR);
return NIL;
}
return T; /* return success */
}
/* MH mail open
* Accepts: stream to open
* Returns: stream on success, NIL on failure
*/
MAILSTREAM *mh_open (MAILSTREAM *stream)
{
char tmp[MAILTMPLEN];
if (!stream) return &mhproto; /* return prototype for OP_PROTOTYPE call */
if (LOCAL) { /* close old file if stream being recycled */
mh_close (stream,NIL); /* dump and save the changes */
stream->dtb = &mhdriver; /* reattach this driver */
mail_free_cache (stream); /* clean up cache */
}
stream->local = fs_get (sizeof (MHLOCAL));
/* note if an INBOX or not */
LOCAL->inbox = !strcmp (ucase (strcpy (tmp,stream->mailbox)),"#MHINBOX");
mh_file (tmp,stream->mailbox);/* get directory name */
LOCAL->dir = cpystr (tmp); /* copy directory name for later */
LOCAL->hdr = NIL; /* no current header */
/* make temporary buffer */
LOCAL->buf = (char *) fs_get ((LOCAL->buflen = MAXMESSAGESIZE) + 1);
LOCAL->scantime = 0; /* not scanned yet */
stream->sequence++; /* bump sequence number */
/* parse mailbox */
stream->nmsgs = stream->recent = 0;
if (mh_ping (stream) && !(stream->nmsgs || stream->silent))
mm_log ("Mailbox is empty",(long) NIL);
return stream; /* return stream to caller */
}
/* MH mail close
* Accepts: MAIL stream
* close options
*/
void mh_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) mh_expunge (stream);
if (LOCAL->dir) fs_give ((void **) &LOCAL->dir);
mh_gc (stream,GC_TEXTS); /* free local cache */
/* free local scratch buffer */
if (LOCAL->buf) fs_give ((void **) &LOCAL->buf);
if (LOCAL->hdr) fs_give ((void **) &LOCAL->hdr);
/* nuke the local data */
fs_give ((void **) &stream->local);
stream->dtb = NIL; /* log out the DTB */
}
}
/* MH mail fetch fast information
* Accepts: MAIL stream
* sequence
* option flags
*/
void mh_fetchfast (MAILSTREAM *stream,char *sequence,long flags)
{
long i;
BODY *b;
/* ugly and slow */
if (stream && LOCAL && ((flags & FT_UID) ?
mail_uid_sequence (stream,sequence) :
mail_sequence (stream,sequence)))
for (i = 1; i <= stream->nmsgs; i++)
if (mail_elt (stream,i)->sequence)
mh_fetchstructure (stream,i,&b,flags & ~FT_UID);
}
/* MH mail fetch flags
* Accepts: MAIL stream
* sequence
* option flags
*/
void mh_fetchflags (MAILSTREAM *stream,char *sequence,long flags)
{
return; /* no-op for local mail */
}
/* MH mail fetch message structure
* Accepts: MAIL stream
* message # to fetch
* pointer to return body
* option flags
* Returns: envelope of this message, body returned in body value
*
* Fetches the "fast" information as well
*/
ENVELOPE *mh_fetchstructure (MAILSTREAM *stream,unsigned long msgno,
BODY **body,long flags)
{
char *h;
LONGCACHE *lelt;
ENVELOPE **env;
STRING bs;
BODY **b;
unsigned long hdrsize;
MESSAGECACHE *elt;
unsigned long i;
if (flags & FT_UID) { /* UID form of call */
for (i = 1; i <= stream->nmsgs; i++)
if (mail_uid (stream,i) == msgno)
return mh_fetchstructure (stream,i,body,flags & ~FT_UID);
return NIL; /* didn't find the UID */
}
elt = mail_elt (stream,msgno);
if (stream->scache) { /* short cache */
if (msgno != stream->msgno){/* flush old poop if a different message */
mail_free_envelope (&stream->env);
mail_free_body (&stream->body);
}
stream->msgno = msgno;
env = &stream->env; /* get pointers to envelope and body */
b = &stream->body;
}
else { /* long cache */
lelt = mail_lelt (stream,msgno);
env = &lelt->env; /* get pointers to envelope and body */
b = &lelt->body;
}
if ((body && !*b) || !*env) { /* have the poop we need? */
mail_free_envelope (env); /* flush old envelope and body */
mail_free_body (b);
h = mh_fetchheader (stream,msgno,NIL,&hdrsize,NIL);
/* only if want body */
if (body) INIT (&bs,mail_string,
(void *) (stream->text ? stream->text : ""),elt->data2);
/* parse envelope and body */
rfc822_parse_msg (env,body ? b : NIL,h,hdrsize,body ? &bs : NIL,
mylocalhost (),LOCAL->buf);
}
if (body) *body = *b; /* return the body */
return *env; /* return the envelope */
}
/* MH mail fetch message header
* Accepts: MAIL stream
* message # to fetch
* lines to fetch
* pointer to returned header text length
* option flags
* Returns: message header in RFC822 format
*/
char *mh_fetchheader (MAILSTREAM *stream,unsigned long msgno,
STRINGLIST *lines,unsigned long *len,long flags)
{
unsigned long i,hdrsize;
int fd;
char *s,*b,*t;
long m = msgno - 1;
struct stat sbuf;
struct tm *tm;
MESSAGECACHE *elt;
if (flags & FT_UID) { /* UID form of call */
for (i = 1; i <= stream->nmsgs; i++)
if (mail_uid (stream,i) == msgno)
return mh_fetchheader (stream,i,lines,len,flags & ~FT_UID);
return ""; /* didn't find the UID */
}
elt = mail_elt (stream,msgno);/* get elt */
/* build message file name */
sprintf (LOCAL->buf,"%s/%lu",LOCAL->dir,elt->uid);
if (stream->msgno != msgno) {
mh_gc (stream,GC_TEXTS); /* invalidate current cache */
if ((fd = open (LOCAL->buf,O_RDONLY,NIL)) >= 0) {
fstat (fd,&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;
/* slurp message */
read (fd,s = (char *) fs_get (sbuf.st_size +1),sbuf.st_size);
s[sbuf.st_size] = '\0'; /* tie off file */
close (fd); /* flush message file */
stream->msgno = msgno; /* note current message number */
/* find end of header */
for (i = 0,b = s; *b && !(i && (*b == '\n')); i = (*b++ == '\n'));
hdrsize = (*b ? ++b:b)-s; /* number of header bytes */
elt->rfc822_size = /* size of entire message in CRLF form */
(elt->data1 = strcrlfcpy (&LOCAL->hdr,&i,s,hdrsize)) +
(elt->data2 = strcrlfcpy(&stream->text,&i,b,sbuf.st_size - hdrsize));
fs_give ((void **) &s); /* flush old data */
}
}
if (!(s = LOCAL->hdr)) { /* if no header found */
s = ""; /* dummy string */
i = 0; /* empty */
}
else if (lines) { /* if want filtering, filter copy of text */
i = mail_filter (strcpy (LOCAL->buf,LOCAL->hdr),elt->data1,lines,flags);
s = LOCAL->buf;
}
else i = elt->data1; /* header length */
if (len) *len = i; /* return header length */
return s; /* return header */
}
/* MH mail fetch message text (body only)
* Accepts: MAIL stream
* message # to fetch
* pointer to returned message length
* option flags
* Returns: message text in RFC822 format
*/
char *mh_fetchtext (MAILSTREAM *stream,unsigned long msgno,
unsigned long *len,long flags)
{
MESSAGECACHE *elt;
unsigned long i;
if (flags & FT_UID) { /* UID form of call */
for (i = 1; i <= stream->nmsgs; i++)
if (mail_uid (stream,i) == msgno)
return mh_fetchtext (stream,i,len,flags & ~FT_UID);
return ""; /* didn't find the UID */
}
elt = mail_elt (stream,msgno);/* get elt */
/* snarf message if don't have it yet */
if (stream->msgno != msgno) mh_fetchheader (stream,msgno,NIL,NIL,flags);
if (!(flags & FT_PEEK)) elt->seen = T;
if (len) *len = elt->data2;
return stream->text ? stream->text : "";
}
/* MH fetch message body as a structure
* Accepts: Mail stream
* message # to fetch
* section specifier
* pointer to length
* Returns: pointer to section of message body
*/
char *mh_fetchbody (MAILSTREAM *stream,unsigned long msgno,char *s,
unsigned long *len,long flags)
{
BODY *b;
PART *pt;
char *base;
unsigned long offset = 0;
unsigned long i,size = 0;
unsigned short enc = ENC7BIT;
MESSAGECACHE *elt;
if (flags & FT_UID) { /* UID form of call */
for (i = 1; i <= stream->nmsgs; i++)
if (mail_uid (stream,i) == msgno)
return mh_fetchbody (stream,i,s,len,flags & ~FT_UID);
return NIL; /* didn't find the UID */
}
elt = mail_elt (stream,msgno);/* get elt */
/* make sure have a body */
if (!(mh_fetchstructure (stream,msgno,&b,flags & ~FT_UID) && b && s && *s &&
isdigit (*s) && (base = mh_fetchtext (stream,msgno,NIL,FT_PEEK))))
return NIL;
if (!(i = strtoul (s,&s,10))) /* section 0 */
return *s ? NIL : mh_fetchheader (stream,msgno,NIL,len,flags);
do { /* until find desired body part */
/* multipart content? */
if (b->type == TYPEMULTIPART) {
pt = b->contents.part; /* yes, find desired part */
while (--i && (pt = pt->next));
if (!pt) return NIL; /* bad specifier */
/* note new body, check valid nesting */
if (((b = &pt->body)->type == TYPEMULTIPART) && !*s) return NIL;
offset = pt->offset; /* get new offset */
}
else if (i != 1) return NIL;/* otherwise must be section 1 */
/* need to go down further? */
if (i = *s) switch (b->type) {
case TYPEMESSAGE: /* embedded message */
if (!((*s++ == '.') && isdigit (*s))) return NIL;
/* get message's body if non-zero */
if (i = strtoul (s,&s,10)) {
offset = b->contents.msg.offset;
b = b->contents.msg.body;
}
else { /* want header */
size = b->contents.msg.offset - offset;
b = NIL; /* make sure the code below knows */
}
break;
case TYPEMULTIPART: /* multipart, get next section */
if ((*s++ == '.') && (i = strtol (s,&s,10)) > 0) break;
default: /* bogus subpart specification */
return NIL;
}
} while (i);
if (b) { /* looking at a non-multipart body? */
if (b->type == TYPEMULTIPART) return NIL;
size = b->size.ibytes; /* yes, get its size */
enc = b->encoding;
}
else if (!size) return NIL; /* lose if not getting a header */
/* if message not seen */
if (flags & ~FT_PEEK) elt->seen = T;
return rfc822_contents (&LOCAL->buf,&LOCAL->buflen,len,base+offset,size,enc);
}
/* MH mail set flag
* Accepts: MAIL stream
* sequence
* flag(s)
* option flags
*/
void mh_setflag (MAILSTREAM *stream,char *sequence,char *flag,long flags)
{
MESSAGECACHE *elt;
unsigned long i,uf;
long f = mail_parse_flags (stream,flag,&uf);
if (!f) return; /* no-op if no flags to modify */
/* get sequence and loop on it */
if ((flags & ST_UID) ? mail_uid_sequence (stream,sequence) :
mail_sequence (stream,sequence))
for (i = 1; i <= stream->nmsgs; i++)
if ((elt = mail_elt (stream,i))->sequence) {
/* set all requested flags */
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;
}
}
/* MH mail clear flag
* Accepts: MAIL stream
* sequence
* flag(s)
* option flags
*/
void mh_clearflag (MAILSTREAM *stream,char *sequence,char *flag,long flags)
{
MESSAGECACHE *elt;
unsigned long i,uf;
long f = mail_parse_flags (stream,flag,&uf);
if (!f) return; /* no-op if no flags to modify */
/* get sequence and loop on it */
if ((flags & ST_UID) ? mail_uid_sequence (stream,sequence) :
mail_sequence (stream,sequence))
for (i = 1; i <= stream->nmsgs; i++)
if ((elt = mail_elt (stream,i))->sequence) {
/* clear all requested flags */
if (f&fSEEN) elt->seen = NIL;
if (f&fDELETED) elt->deleted = NIL;
if (f&fFLAGGED) elt->flagged = NIL;
if (f&fANSWERED) elt->answered = NIL;
if (f&fDRAFT) elt->draft = NIL;
}
}
/* MH mail ping mailbox
* Accepts: MAIL stream
* Returns: T if stream alive, else NIL
*/
long mh_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;
stat (LOCAL->dir,&sbuf);
if (sbuf.st_ctime != LOCAL->scantime) {
struct direct **names = NIL;
long nfiles = scandir (LOCAL->dir,&names,mh_select,mh_numsort);
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) {
stream->uid_last = (elt = mail_elt (stream,++nmsgs))->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 */
}
else { /* see if already read */
sprintf (tmp,"%s/%s",LOCAL->dir,names[i]->d_name);
stat (tmp,&sbuf); /* get inode poop */
if (sbuf.st_atime > sbuf.st_mtime) elt->seen = T;
}
}
fs_give ((void **) &names[i]);
}
/* free directory */
if (names) fs_give ((void **) &names);
}
if (LOCAL->inbox) { /* if INBOX, snarf from system INBOX */
old = stream->uid_last;
/* paranoia check */
if (!strcmp (sysinbox (),stream->mailbox)) 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_INTERNAL)) &&
(write (fd,s,j) == j) &&
(s = mail_fetchtext_full (sysibx,i,&j,FT_INTERNAL)) &&
(write (fd,s,j) == j) && !fsync (fd) && !close (fd)) {
/* create new elt, note its file number */
stream->uid_last = (elt = mail_elt (stream,++nmsgs))->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;
/* should set the file date too */
}
else { /* failed to snarf */
if (fd) { /* did it ever get opened? */
close (fd); /* close descriptor */
unlink (LOCAL->buf);/* flush this file */
}
return NIL; /* note that something is badly wrong */
}
selt->deleted = T; /* delete it from the sysinbox */
}
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 */
}
mail_exists (stream,nmsgs); /* notify upper level of mailbox size */
mail_recent (stream,recent);
return T; /* return that we are alive */
}
/* MH mail check mailbox
* Accepts: MAIL stream
*/
void mh_check (MAILSTREAM *stream)
{
/* Perhaps in the future this will preserve flags */
if (mh_ping (stream)) mm_log ("Check completed",(long) NIL);
}
/* MH mail expunge mailbox
* Accepts: MAIL stream
*/
void mh_expunge (MAILSTREAM *stream)
{
MESSAGECACHE *elt;
unsigned long j;
unsigned long i = 1;
unsigned long n = 0;
unsigned long recent = stream->recent;
mh_gc (stream,GC_TEXTS); /* invalidate texts */
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->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;
}
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 */
/* notify upper level of new mailbox size */
mail_exists (stream,stream->nmsgs);
mail_recent (stream,recent);
}
/* MH mail copy message(s)
* Accepts: MAIL stream
* sequence
* destination mailbox
* copy options
* Returns: T if copy successful, else NIL
*/
long mh_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options)
{
STRING st;
MESSAGECACHE *elt;
struct stat sbuf;
int fd;
long i;
char *s,tmp[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) {
sprintf (LOCAL->buf,"%s/%lu",LOCAL->dir,elt->uid);
if ((fd = open (LOCAL->buf,O_RDONLY,NIL)) < 0) return NIL;
fstat (fd,&sbuf); /* get size of message */
/* slurp message */
read (fd,s = (char *) fs_get (sbuf.st_size +1),sbuf.st_size);
s[sbuf.st_size] = '\0'; /* tie off file */
close (fd); /* flush message file */
INIT (&st,mail_string,(void *) s,sbuf.st_size);
sprintf (LOCAL->buf,"%s%s%s%s%s)",
elt->seen ? " \\Seen" : "",
elt->deleted ? " \\Deleted" : "",
elt->flagged ? " \\Flagged" : "",
elt->answered ? " \\Answered" : "",
elt->draft ? " \\Draft" : "",
(elt->seen || elt->deleted || elt->flagged || elt->answered ||
elt->draft) ? "" : " ");
LOCAL->buf[0] = '('; /* open list */
mail_date (tmp,elt); /* generate internal date */
if (!mh_append (stream,mailbox,LOCAL->buf,tmp,&st)) {
fs_give((void **) &s);/* give back temporary space */
return NIL;
}
fs_give ((void **) &s); /* give back temporary space */
if (options & CP_MOVE) elt->deleted = T;
}
return T; /* return success */
}
/* MH mail append message from stringstruct
* Accepts: MAIL stream
* destination mailbox
* stringstruct of messages to append
* Returns: T if append successful, else NIL
*/
long mh_append (MAILSTREAM *stream,char *mailbox,char *flags,char *date,
STRING *message)
{
struct stat sbuf;
struct direct **names;
int fd;
char c,*s,*t,tmp[MAILTMPLEN];
MESSAGECACHE elt;
long i,last,nfiles;
long size = 0;
long ret = LONGT;
unsigned long uf;
short f = mail_parse_flags (stream ? stream : &mhproto,flags,&uf);
if (date) { /* want to preserve date? */
/* yes, parse date into an elt */
if (!mail_parse_date (&elt,date)) {
sprintf (tmp,"Bad date in append: %s",date);
mm_log (tmp,ERROR);
return NIL;
}
}
/* N.B.: can't use LOCAL->buf for tmp */
/* make sure valid mailbox */
if (!mh_isvalid (mailbox,tmp,NIL)) switch (errno) {
case ENOENT: /* no such file? */
mm_notify (stream,"[TRYCREATE] Must create mailbox before append",NIL);
return NIL;
case 0: /* merely empty file? */
break;
case EINVAL:
sprintf (tmp,"Invalid MH-format mailbox name: %s",mailbox);
mm_log (tmp,ERROR);
return NIL;
default:
sprintf (tmp,"Not a MH-format mailbox: %s",mailbox);
mm_log (tmp,ERROR);
return NIL;
}
mh_file (tmp,mailbox); /* build file name we will use */
if (nfiles = scandir (tmp,&names,mh_select,mh_numsort)) {
/* largest number */
last = atoi (names[nfiles-1]->d_name);
for (i = 0; i < nfiles; ++i) /* free directory */
fs_give ((void **) &names[i]);
}
else last = 0; /* no messages here yet */
if (names) fs_give ((void **) &names);
sprintf (tmp + strlen (tmp),"/%lu",++last);
if ((fd = open (tmp,O_WRONLY|O_CREAT|O_EXCL,S_IREAD|S_IWRITE)) < 0) {
sprintf (tmp,"Can't open append mailbox: %s",strerror (errno));
mm_log (tmp,ERROR);
return NIL;
}
i = SIZE (message); /* get size of message */
s = (char *) fs_get (i + 1); /* get space for the data */
/* copy the data w/o CR's */
while (i--) if ((c = SNX (message)) != '\015') s[size++] = c;
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 */
mm_nocritical (stream); /* release critical */
fs_give ((void **) &s); /* flush the buffer */
return ret;
}
/* MH garbage collect stream
* Accepts: Mail stream
* garbage collection flags
*/
void mh_gc (MAILSTREAM *stream,long gcflags)
{
unsigned long i;
if (gcflags & GC_TEXTS) { /* garbage collect texts? */
/* flush texts from cache */
if (LOCAL->hdr) fs_give ((void **) &LOCAL->hdr);
if (stream->text) fs_give ((void **) &stream->text);
stream->msgno = 0; /* invalidate stream text */
}
}
/* Internal routines */
/* MH file name selection test
* Accepts: candidate directory entry
* Returns: T to use file name, NIL to skip it
*/
int mh_select (struct direct *name)
{
char c;
char *s = name->d_name;
while (c = *s++) if (!isdigit (c)) return NIL;
return T;
}
/* MH 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 mh_numsort (const void *d1,const void *d2)
{
return atoi ((*(struct direct **) d1)->d_name) -
atoi ((*(struct direct **) d2)->d_name);
}
/* MH mail build file name
* Accepts: destination string
* source
* Returns: destination
*/
char *mh_file (char *dst,char *name)
{
char tmp[MAILTMPLEN];
/* build composite name */
sprintf (dst,"%s/%s",mh_path,strcmp (ucase (strcpy (tmp,name)),"#MHINBOX") ?
name + 4 : "inbox");
return dst;
}
/* MH canonicalize name
* Accepts: buffer to write name
* reference
* pattern
* Returns: T if success, NIL if failure
*/
long mh_canonicalize (char *pattern,char *ref,char *pat)
{
if (ref && *ref) { /* have a reference */
strcpy (pattern,ref); /* copy reference to pattern */
/* # overrides mailbox field in reference */
if (*pat == '#') strcpy (pattern,pat);
/* pattern starts, reference ends, with / */
else if ((*pat == '/') && (pattern[strlen (pattern) - 1] == '/'))
strcat (pattern,pat + 1); /* append, omitting one of the period */
else strcat (pattern,pat); /* anything else is just appended */
}
else strcpy (pattern,pat); /* just have basic name */
return ((pattern[0] == '#') &&
((pattern[1] == 'm') || (pattern[1] == 'M')) &&
((pattern[1] == 'h') || (pattern[1] == 'H')) &&
((pattern[3] == '/') ||
(((pattern[3] == 'i') || (pattern[3] == 'I')) &&
((pattern[4] == 'n') || (pattern[4] == 'N')) &&
((pattern[5] == 'b') || (pattern[5] == 'B')) &&
((pattern[6] == 'o') || (pattern[6] == 'O')) &&
((pattern[7] == 'x') || (pattern[7] == 'X')) && !pattern[8]))) ?
T : NIL;
}
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