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news.c
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C/C++ Source or Header
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1996-05-15
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35KB
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1,316 lines
/*
* Program: Netnews mail routines
*
* Author: Mark Crispin
* Networks and Distributed Computing
* Computing & Communications
* University of Washington
* Administration Building, AG-44
* Seattle, WA 98195
* Internet: MRC@CAC.Washington.EDU
*
* Date: 4 September 1991
* Last Edited: 15 May 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 <sys/stat.h>
#include <sys/time.h>
#include "news.h"
#include "rfc822.h"
#include "misc.h"
#include "newsrc.h"
/* Netnews mail routines */
/* Driver dispatch used by MAIL */
DRIVER newsdriver = {
"news", /* driver name */
(DRIVER *) NIL, /* next driver */
news_valid, /* mailbox is valid for us */
news_parameters, /* manipulate parameters */
news_find, /* find mailboxes */
news_find_bboards, /* find bboards */
news_find_all, /* find all mailboxes */
news_find_all_bboards, /* find all bboards */
news_subscribe, /* subscribe to mailbox */
news_unsubscribe, /* unsubscribe from mailbox */
news_subscribe_bboard, /* subscribe to bboard */
news_unsubscribe_bboard, /* unsubscribe from bboard */
news_create, /* create mailbox */
news_delete, /* delete mailbox */
news_rename, /* rename mailbox */
news_open, /* open mailbox */
news_close, /* close mailbox */
news_fetchfast, /* fetch message "fast" attributes */
news_fetchflags, /* fetch message flags */
news_fetchstructure, /* fetch message envelopes */
news_fetchheader, /* fetch message header only */
news_fetchtext, /* fetch message body only */
news_fetchbody, /* fetch message body section */
news_setflag, /* set message flag */
news_clearflag, /* clear message flag */
news_search, /* search for message based on criteria */
news_ping, /* ping mailbox to see if still alive */
news_check, /* check for new messages */
news_expunge, /* expunge deleted messages */
news_copy, /* copy messages to another mailbox */
news_move, /* move messages to another mailbox */
news_append, /* append string message to mailbox */
news_gc /* garbage collect stream */
};
/* prototype stream */
MAILSTREAM newsproto = {&newsdriver};
/* Netnews mail validate mailbox
* Accepts: mailbox name
* Returns: our driver if name is valid, NIL otherwise
*/
DRIVER *news_valid (name)
char *name;
{
int fd;
char *s,*t,*u;
char tmp[MAILTMPLEN];
struct stat sbuf;
DRIVER *ret = NIL;
/* looks plausible and news installed? */
if (name && (*name == '*') && !(strchr (name,'/')) &&
!stat ((char *) mail_parameters (NIL,GET_NEWSSPOOL,NIL),&sbuf) &&
((fd = open ((char *) mail_parameters (NIL,GET_NEWSACTIVE,NIL),O_RDONLY,
NIL)) >= 0)) {
fstat (fd,&sbuf); /* get size of active file */
/* slurp in active file */
read (fd,t = s = (char *) fs_get (sbuf.st_size+1),sbuf.st_size);
s[sbuf.st_size] = '\0'; /* tie off file */
close (fd); /* flush file */
lcase (strcpy (tmp,name+1));/* make sure compare with lower case */
while (*t && (u = strchr (t,' '))) {
*u++ = '\0'; /* tie off at end of name */
if (!strcmp (tmp,t)) { /* name matches? */
ret = &newsdriver; /* seems to be a valid name */
break;
}
t = 1 + strchr (u,'\n'); /* next line */
}
fs_give ((void **) &s); /* flush data */
}
return ret; /* return status */
}
/* News manipulate driver parameters
* Accepts: function code
* function-dependent value
* Returns: function-dependent return value
*/
void *news_parameters (function,value)
long function;
void *value;
{
return NIL;
}
/* Netnews mail find list of mailboxes
* Accepts: mail stream
* pattern to search
*/
void news_find (stream,pat)
MAILSTREAM *stream;
char *pat;
{
/* Always a no-op */
}
/* Netnews mail find list of bboards
* Accepts: mail stream
* pattern to search
*/
void news_find_bboards (stream,pat)
MAILSTREAM *stream;
char *pat;
{
char *t;
void *s = NIL;
struct stat sbuf;
/* read from newsrc if have local news spool */
if (!(stat ((char *) mail_parameters (NIL,GET_NEWSSPOOL,NIL),&sbuf) ||
stat ((char *) mail_parameters (NIL,GET_NEWSACTIVE,NIL),&sbuf) ||
(stream && stream->anonymous))) newsrc_find (pat);
while (t = sm_read (&s)) /* get data from subscription manager */
if ((*t == '*') && pmatch (t+1,pat)) mm_bboard (t+1);
}
/* Netnews mail find list of all mailboxes
* Accepts: mail stream
* pattern to search
*/
void news_find_all (stream,pat)
MAILSTREAM *stream;
char *pat;
{
/* Always a no-op */
}
/* Netnews mail find list of all bboards
* Accepts: mail stream
* pattern to search
*/
void news_find_all_bboards (stream,pat)
MAILSTREAM *stream;
char *pat;
{
int fd;
char patx[MAILTMPLEN];
char *s,*t,*u;
struct stat sbuf;
lcase (strcpy (patx,pat)); /* make sure compare with lower case */
if ((!stat ((char *) mail_parameters (NIL,GET_NEWSSPOOL,NIL),&sbuf)) &&
((fd = open ((char *) mail_parameters (NIL,GET_NEWSACTIVE,NIL),O_RDONLY,
NIL)) >= 0)) {
fstat (fd,&sbuf); /* get file size and read data */
read (fd,s = (char *) fs_get (sbuf.st_size + 1),sbuf.st_size);
close (fd); /* close file */
s[sbuf.st_size] = '\0'; /* tie off string */
if (t = strtok (s,"\n")) do if (u = strchr (t,' ')) {
*u = '\0'; /* tie off at end of name */
if (pmatch (lcase (t),patx)) mm_bboard (t);
} while (t = strtok (NIL,"\n"));
fs_give ((void **) &s);
}
}
/* Netnews mail subscribe to mailbox
* Accepts: mail stream
* mailbox to add to subscription list
* Returns: T on success, NIL on failure
*/
long news_subscribe (stream,mailbox)
MAILSTREAM *stream;
char *mailbox;
{
return NIL; /* never valid for netnews */
}
/* Netnews mail unsubscribe to mailbox
* Accepts: mail stream
* mailbox to delete from subscription list
* Returns: T on success, NIL on failure
*/
long news_unsubscribe (stream,mailbox)
MAILSTREAM *stream;
char *mailbox;
{
return NIL; /* never valid for netnews */
}
/* Netnews mail subscribe to bboard
* Accepts: mail stream
* bboard to add to subscription list
* Returns: T on success, NIL on failure
*/
long news_subscribe_bboard (stream,mailbox)
MAILSTREAM *stream;
char *mailbox;
{
return newsrc_update (mailbox,':');
}
/* Netnews mail unsubscribe to bboard
* Accepts: mail stream
* bboard to delete from subscription list
* Returns: T on success, NIL on failure
*/
long news_unsubscribe_bboard (stream,mailbox)
MAILSTREAM *stream;
char *mailbox;
{
return newsrc_update (mailbox,'!');
}
/* Netnews mail create mailbox
* Accepts: mail stream
* mailbox name to create
* Returns: T on success, NIL on failure
*/
long news_create (stream,mailbox)
MAILSTREAM *stream;
char *mailbox;
{
return NIL; /* never valid for netnews */
}
/* Netnews mail delete mailbox
* mailbox name to delete
* Returns: T on success, NIL on failure
*/
long news_delete (stream,mailbox)
MAILSTREAM *stream;
char *mailbox;
{
return NIL; /* never valid for netnews */
}
/* Netnews mail rename mailbox
* Accepts: mail stream
* old mailbox name
* new mailbox name
* Returns: T on success, NIL on failure
*/
long news_rename (stream,old,new)
MAILSTREAM *stream;
char *old;
char *new;
{
return NIL; /* never valid for netnews */
}
/* Netnews mail open
* Accepts: stream to open
* Returns: stream on success, NIL on failure
*/
MAILSTREAM *news_open (stream)
MAILSTREAM *stream;
{
long i,nmsgs,j,k;
char c = NIL,*s,*t,tmp[MAILTMPLEN];
struct direct **names;
/* return prototype for OP_PROTOTYPE call */
if (!stream) return &newsproto;
if (LOCAL) { /* close old file if stream being recycled */
news_close (stream); /* dump and save the changes */
stream->dtb = &newsdriver; /* reattach this driver */
mail_free_cache (stream); /* clean up cache */
}
lcase (stream->mailbox); /* build news directory name */
sprintf (s = tmp,"%s/%s",(char *) mail_parameters (NIL,GET_NEWSSPOOL,NIL),
stream->mailbox + 1);
while (s = strchr (s,'.')) *s = '/';
/* scan directory */
if ((nmsgs = scandir (tmp,&names,news_select,news_numsort)) >= 0) {
stream->local = fs_get (sizeof (NEWSLOCAL));
LOCAL->dirty = NIL; /* no update to .newsrc needed yet */
LOCAL->dir = cpystr (tmp); /* copy directory name for later */
LOCAL->name = cpystr (stream->mailbox + 1);
/* create cache */
LOCAL->number = (unsigned long *) fs_get (nmsgs * sizeof (unsigned long));
LOCAL->header = (char **) fs_get (nmsgs * sizeof (char *));
LOCAL->body = (char **) fs_get (nmsgs * sizeof (char *));
for (i = 0; i<nmsgs; ++i) { /* initialize cache */
LOCAL->number[i] = atoi (names[i]->d_name);
fs_give ((void **) &names[i]);
LOCAL->header[i] = LOCAL->body[i] = NIL;
}
fs_give ((void **) &names); /* free directory */
/* make temporary buffer */
LOCAL->buf = (char *) fs_get ((LOCAL->buflen = MAXMESSAGESIZE) + 1);
stream->sequence++; /* bump sequence number */
stream->rdonly = T; /* make sure higher level knows readonly */
mail_exists (stream,nmsgs); /* notify upper level that messages exist */
/* read .newsrc entries */
mail_recent (stream,newsrc_read (LOCAL->name,stream,LOCAL->number));
/* notify if empty bboard */
if (!(stream->nmsgs || stream->silent)) {
sprintf (tmp,"Newsgroup %s is empty",LOCAL->name);
mm_log (tmp,WARN);
}
}
return LOCAL ? stream : NIL; /* if stream is alive, return to caller */
}
/* Netnews file name selection test
* Accepts: candidate directory entry
* Returns: T to use file name, NIL to skip it
*/
int news_select (name)
struct direct *name;
{
char c;
char *s = name->d_name;
while (c = *s++) if (!isdigit (c)) return NIL;
return T;
}
/* Netnews 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 news_numsort (d1,d2)
struct direct **d1;
struct direct **d2;
{
return (atoi ((*d1)->d_name) - atoi ((*d2)->d_name));
}
/* Netnews mail close
* Accepts: MAIL stream
*/
void news_close (stream)
MAILSTREAM *stream;
{
if (LOCAL) { /* only if a file is open */
news_check (stream); /* dump final checkpoint */
if (LOCAL->dir) fs_give ((void **) &LOCAL->dir);
if (LOCAL->name) fs_give ((void **) &LOCAL->name);
news_gc (stream,GC_TEXTS); /* free local cache */
fs_give ((void **) &LOCAL->number);
fs_give ((void **) &LOCAL->header);
fs_give ((void **) &LOCAL->body);
/* 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 */
}
}
/* Netnews mail fetch fast information
* Accepts: MAIL stream
* sequence
*/
void news_fetchfast (stream,sequence)
MAILSTREAM *stream;
char *sequence;
{
long i;
/* ugly and slow */
if (stream && LOCAL && mail_sequence (stream,sequence))
for (i = 1; i <= stream->nmsgs; i++)
if (mail_elt (stream,i)->sequence)
news_fetchheader (stream,i);
}
/* Netnews mail fetch flags
* Accepts: MAIL stream
* sequence
*/
void news_fetchflags (stream,sequence)
MAILSTREAM *stream;
char *sequence;
{
return; /* no-op for local mail */
}
/* Netnews mail fetch envelope
* Accepts: MAIL stream
* message # to fetch
* pointer to return body
* Returns: envelope of this message, body returned in body value
*
* Fetches the "fast" information as well
*/
ENVELOPE *news_fetchstructure (stream,msgno,body)
MAILSTREAM *stream;
long msgno;
BODY **body;
{
char *h,*t;
LONGCACHE *lelt;
ENVELOPE **env;
STRING bs;
BODY **b;
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 = news_fetchheader (stream,msgno);
/* can't use fetchtext since it'll set seen */
t = LOCAL->body[msgno - 1] ? LOCAL->body[msgno - 1] : "";
INIT (&bs,mail_string,(void *) t,strlen (t));
/* parse envelope and body */
rfc822_parse_msg (env,body ? b : NIL,h,strlen (h),&bs,BADHOST,LOCAL->buf);
}
if (body) *body = *b; /* return the body */
return *env; /* return the envelope */
}
/* Netnews mail fetch message header
* Accepts: MAIL stream
* message # to fetch
* Returns: message header in RFC822 format
*/
char *news_fetchheader (stream,msgno)
MAILSTREAM *stream;
long msgno;
{
unsigned long i,hdrsize;
int fd;
char *s,*b;
long m = msgno - 1;
struct stat sbuf;
struct tm *tm;
MESSAGECACHE *elt = mail_elt (stream,msgno);
/* build message file name */
sprintf (LOCAL->buf,"%s/%lu",LOCAL->dir,LOCAL->number[m]);
if (!LOCAL->header[m] && ((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 */
/* 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 */
strcrlfcpy (&LOCAL->header[m],&i,s,hdrsize) +
strcrlfcpy (&LOCAL->body[m],&i,b,sbuf.st_size - hdrsize);
fs_give ((void **) &s); /* flush old data */
}
return LOCAL->header[m] ? LOCAL->header[m] : "";
}
/* Netnews mail fetch message text (only)
body only;
* Accepts: MAIL stream
* message # to fetch
* Returns: message text in RFC822 format
*/
char *news_fetchtext (stream,msgno)
MAILSTREAM *stream;
long msgno;
{
long i = msgno - 1;
MESSAGECACHE *elt = mail_elt (stream,msgno);
/* snarf message in case don't have it yet */
news_fetchheader (stream,msgno);
elt->seen = T; /* mark as seen */
return LOCAL->body[i] ? LOCAL->body[i] : "";
}
/* Netnews 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 *news_fetchbody (stream,m,s,len)
MAILSTREAM *stream;
long m;
char *s;
unsigned long *len;
{
BODY *b;
PART *pt;
unsigned long i;
char *base;
unsigned long offset = 0;
MESSAGECACHE *elt = mail_elt (stream,m);
/* make sure have a body */
if (!(news_fetchstructure (stream,m,&b) && b && s && *s &&
((i = strtol (s,&s,10)) > 0) && (base = news_fetchtext (stream,m))))
return NIL;
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, calculate new base */
offset = b->contents.msg.offset;
b = b->contents.msg.body; /* get its body, drop into multipart case */
case TYPEMULTIPART: /* multipart, get next section */
if ((*s++ == '.') && (i = strtol (s,&s,10)) > 0) break;
default: /* bogus subpart specification */
return NIL;
}
} while (i);
/* lose if body bogus */
if ((!b) || b->type == TYPEMULTIPART) return NIL;
elt->seen = T; /* mark as seen */
return rfc822_contents (&LOCAL->buf,&LOCAL->buflen,len,base + offset,
b->size.ibytes,b->encoding);
}
/* Netnews mail set flag
* Accepts: MAIL stream
* sequence
* flag(s)
*/
void news_setflag (stream,sequence,flag)
MAILSTREAM *stream;
char *sequence;
char *flag;
{
MESSAGECACHE *elt;
long i;
short f = news_getflags (stream,flag);
if (!f) return; /* no-op if no flags to modify */
/* get sequence and loop on it */
if (mail_sequence (stream,sequence)) for (i = 0; i < stream->nmsgs; i++)
if ((elt = mail_elt (stream,i + 1))->sequence) {
if (f&fSEEN) elt->seen=T; /* set all requested flags */
if (f&fDELETED) { /* deletion also purges the cache */
elt->deleted = T; /* mark deleted */
LOCAL->dirty = T; /* mark dirty */
if (LOCAL->header[i]) fs_give ((void **) &LOCAL->header[i]);
if (LOCAL->body[i]) fs_give ((void **) &LOCAL->body[i]);
}
if (f&fFLAGGED) elt->flagged = T;
if (f&fANSWERED) elt->answered = T;
}
}
/* Netnews mail clear flag
* Accepts: MAIL stream
* sequence
* flag(s)
*/
void news_clearflag (stream,sequence,flag)
MAILSTREAM *stream;
char *sequence;
char *flag;
{
MESSAGECACHE *elt;
long i;
short f = news_getflags (stream,flag);
if (!f) return; /* no-op if no flags to modify */
/* get sequence and loop on it */
if (mail_sequence (stream,sequence)) for (i = 0; i < stream->nmsgs; i++)
if ((elt = mail_elt (stream,i + 1))->sequence) {
/* clear all requested flags */
if (f&fSEEN) elt->seen = NIL;
if (f&fDELETED) {
elt->deleted = NIL; /* undelete */
LOCAL->dirty = T; /* mark stream as dirty */
}
if (f&fFLAGGED) elt->flagged = NIL;
if (f&fANSWERED) elt->answered = NIL;
}
}
/* Netnews mail search for messages
* Accepts: MAIL stream
* search criteria
*/
void news_search (stream,criteria)
MAILSTREAM *stream;
char *criteria;
{
long i,n;
char *d;
search_t f;
/* initially all searched */
for (i = 1; i <= stream->nmsgs; ++i) mail_elt (stream,i)->searched = T;
/* get first criterion */
if (criteria && (criteria = strtok (criteria," "))) {
/* for each criterion */
for (; criteria; (criteria = strtok (NIL," "))) {
f = NIL; d = NIL; n = 0; /* init then scan the criterion */
switch (*ucase (criteria)) {
case 'A': /* possible ALL, ANSWERED */
if (!strcmp (criteria+1,"LL")) f = news_search_all;
else if (!strcmp (criteria+1,"NSWERED")) f = news_search_answered;
break;
case 'B': /* possible BCC, BEFORE, BODY */
if (!strcmp (criteria+1,"CC"))
f = news_search_string (news_search_bcc,&d,&n);
else if (!strcmp (criteria+1,"EFORE"))
f = news_search_date (news_search_before,&n);
else if (!strcmp (criteria+1,"ODY"))
f = news_search_string (news_search_body,&d,&n);
break;
case 'C': /* possible CC */
if (!strcmp (criteria+1,"C"))
f = news_search_string (news_search_cc,&d,&n);
break;
case 'D': /* possible DELETED */
if (!strcmp (criteria+1,"ELETED")) f = news_search_deleted;
break;
case 'F': /* possible FLAGGED, FROM */
if (!strcmp (criteria+1,"LAGGED")) f = news_search_flagged;
else if (!strcmp (criteria+1,"ROM"))
f = news_search_string (news_search_from,&d,&n);
break;
case 'K': /* possible KEYWORD */
if (!strcmp (criteria+1,"EYWORD"))
f = news_search_flag (news_search_keyword,&d);
break;
case 'N': /* possible NEW */
if (!strcmp (criteria+1,"EW")) f = news_search_new;
break;
case 'O': /* possible OLD, ON */
if (!strcmp (criteria+1,"LD")) f = news_search_old;
else if (!strcmp (criteria+1,"N"))
f = news_search_date (news_search_on,&n);
break;
case 'R': /* possible RECENT */
if (!strcmp (criteria+1,"ECENT")) f = news_search_recent;
break;
case 'S': /* possible SEEN, SINCE, SUBJECT */
if (!strcmp (criteria+1,"EEN")) f = news_search_seen;
else if (!strcmp (criteria+1,"INCE"))
f = news_search_date (news_search_since,&n);
else if (!strcmp (criteria+1,"UBJECT"))
f = news_search_string (news_search_subject,&d,&n);
break;
case 'T': /* possible TEXT, TO */
if (!strcmp (criteria+1,"EXT"))
f = news_search_string (news_search_text,&d,&n);
else if (!strcmp (criteria+1,"O"))
f = news_search_string (news_search_to,&d,&n);
break;
case 'U': /* possible UN* */
if (criteria[1] == 'N') {
if (!strcmp (criteria+2,"ANSWERED")) f = news_search_unanswered;
else if (!strcmp (criteria+2,"DELETED")) f = news_search_undeleted;
else if (!strcmp (criteria+2,"FLAGGED")) f = news_search_unflagged;
else if (!strcmp (criteria+2,"KEYWORD"))
f = news_search_flag (news_search_unkeyword,&d);
else if (!strcmp (criteria+2,"SEEN")) f = news_search_unseen;
}
break;
default: /* we will barf below */
break;
}
if (!f) { /* if can't determine any criteria */
sprintf (LOCAL->buf,"Unknown search criterion: %.80s",criteria);
mm_log (LOCAL->buf,ERROR);
return;
}
/* run the search criterion */
for (i = 1; i <= stream->nmsgs; ++i)
if (mail_elt (stream,i)->searched && !(*f) (stream,i,d,n))
mail_elt (stream,i)->searched = NIL;
}
/* report search results to main program */
for (i = 1; i <= stream->nmsgs; ++i)
if (mail_elt (stream,i)->searched) mail_searched (stream,i);
}
}
/* Netnews mail ping mailbox
* Accepts: MAIL stream
* Returns: T if stream alive, else NIL
*/
long news_ping (stream)
MAILSTREAM *stream;
{
return T; /* always alive */
}
/* Netnews mail check mailbox
* Accepts: MAIL stream
*/
void news_check (stream)
MAILSTREAM *stream;
{
/* never do if no updates */
if (LOCAL->dirty) newsrc_write (LOCAL->name,stream,LOCAL->number);
}
/* Netnews mail expunge mailbox
* Accepts: MAIL stream
*/
void news_expunge (stream)
MAILSTREAM *stream;
{
if (!stream->silent) mm_log ("Expunge ignored on readonly mailbox",NIL);
}
/* Netnews mail copy message(s)
s;
* Accepts: MAIL stream
* sequence
* destination mailbox
* Returns: T if copy successful, else NIL
*/
long news_copy (stream,sequence,mailbox)
MAILSTREAM *stream;
char *sequence;
char *mailbox;
{
mm_log ("Copy not valid for netnews",ERROR);
return NIL;
}
/* Netnews mail move message(s)
s;
* Accepts: MAIL stream
* sequence
* destination mailbox
* Returns: T if move successful, else NIL
*/
long news_move (stream,sequence,mailbox)
MAILSTREAM *stream;
char *sequence;
char *mailbox;
{
mm_log ("Move not valid for netnews",ERROR);
return NIL;
}
/* Netnews mail append message from stringstruct
* Accepts: MAIL stream
* destination mailbox
* stringstruct of messages to append
* Returns: T if append successful, else NIL
*/
long news_append (stream,mailbox,flags,date,message)
MAILSTREAM *stream;
char *mailbox;
char *flags;
char *date;
STRING *message;
{
mm_log ("Append not valid for netnews",ERROR);
return NIL;
}
/* Netnews garbage collect stream
* Accepts: Mail stream
* garbage collection flags
*/
void news_gc (stream,gcflags)
MAILSTREAM *stream;
long gcflags;
{
unsigned long i;
if (gcflags & GC_TEXTS) /* garbage collect texts? */
/* flush texts from cache */
for (i = 0; i < stream->nmsgs; i++) {
if (LOCAL->header[i]) fs_give ((void **) &LOCAL->header[i]);
if (LOCAL->body[i]) fs_give ((void **) &LOCAL->body[i]);
}
}
/* Internal routines */
/* Parse flag list
* Accepts: MAIL stream
* flag list as a character string
* Returns: flag command list
*/
short news_getflags (stream,flag)
MAILSTREAM *stream;
char *flag;
{
char *t,tmp[MAILTMPLEN],err[MAILTMPLEN];
short f = 0;
short i,j;
if (flag && *flag) { /* no-op if no flag string */
/* check if a list and make sure valid */
if ((i = (*flag == '(')) ^ (flag[strlen (flag)-1] == ')')) {
mm_log ("Bad flag list",ERROR);
return NIL;
}
/* copy the flag string w/o list construct */
strncpy (tmp,flag+i,(j = strlen (flag) - (2*i)));
tmp[j] = '\0';
t = ucase (tmp); /* uppercase only from now on */
while (t && *t) { /* parse the flags */
if (*t == '\\') { /* system flag? */
switch (*++t) { /* dispatch based on first character */
case 'S': /* possible \Seen flag */
if (t[1] == 'E' && t[2] == 'E' && t[3] == 'N') i = fSEEN;
t += 4; /* skip past flag name */
break;
case 'D': /* possible \Deleted flag */
if (t[1] == 'E' && t[2] == 'L' && t[3] == 'E' && t[4] == 'T' &&
t[5] == 'E' && t[6] == 'D') i = fDELETED;
t += 7; /* skip past flag name */
break;
case 'F': /* possible \Flagged flag */
if (t[1] == 'L' && t[2] == 'A' && t[3] == 'G' && t[4] == 'G' &&
t[5] == 'E' && t[6] == 'D') i = fFLAGGED;
t += 7; /* skip past flag name */
break;
case 'A': /* possible \Answered flag */
if (t[1] == 'N' && t[2] == 'S' && t[3] == 'W' && t[4] == 'E' &&
t[5] == 'R' && t[6] == 'E' && t[7] == 'D') i = fANSWERED;
t += 8; /* skip past flag name */
break;
default: /* unknown */
i = 0;
break;
}
/* add flag to flags list */
if (i && ((*t == '\0') || (*t++ == ' '))) f |= i;
}
else { /* no user flags yet */
t = strtok (t," "); /* isolate flag name */
sprintf (err,"Unknown flag: %.80s",t);
t = strtok (NIL," "); /* get next flag */
mm_log (err,ERROR);
}
}
}
return f;
}
/* Search support routines
* Accepts: MAIL stream
* message number
* pointer to additional data
* pointer to temporary buffer
* Returns: T if search matches, else NIL
*/
char news_search_all (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return T; /* ALL always succeeds */
}
char news_search_answered (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return mail_elt (stream,msgno)->answered ? T : NIL;
}
char news_search_deleted (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return mail_elt (stream,msgno)->deleted ? T : NIL;
}
char news_search_flagged (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return mail_elt (stream,msgno)->flagged ? T : NIL;
}
char news_search_keyword (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return NIL; /* keywords not supported yet */
}
char news_search_new (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
MESSAGECACHE *elt = mail_elt (stream,msgno);
return (elt->recent && !elt->seen) ? T : NIL;
}
char news_search_old (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return mail_elt (stream,msgno)->recent ? NIL : T;
}
char news_search_recent (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return mail_elt (stream,msgno)->recent ? T : NIL;
}
char news_search_seen (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return mail_elt (stream,msgno)->seen ? T : NIL;
}
char news_search_unanswered (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return mail_elt (stream,msgno)->answered ? NIL : T;
}
char news_search_undeleted (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return mail_elt (stream,msgno)->deleted ? NIL : T;
}
char news_search_unflagged (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return mail_elt (stream,msgno)->flagged ? NIL : T;
}
char news_search_unkeyword (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return T; /* keywords not supported yet */
}
char news_search_unseen (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return mail_elt (stream,msgno)->seen ? NIL : T;
}
char news_search_before (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return (char) (news_msgdate (stream,msgno) < n);
}
char news_search_on (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return (char) (news_msgdate (stream,msgno) == n);
}
char news_search_since (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
/* everybody interprets "since" as .GE. */
return (char) (news_msgdate (stream,msgno) >= n);
}
unsigned long news_msgdate (stream,msgno)
MAILSTREAM *stream;
long msgno;
{
struct stat sbuf;
struct tm *tm;
MESSAGECACHE *elt = mail_elt (stream,msgno);
if (!elt->day) { /* get date if don't have it yet */
/* build message file name */
sprintf (LOCAL->buf,"%s/%lu",LOCAL->dir,LOCAL->number[msgno - 1]);
stat (LOCAL->buf,&sbuf); /* get message date */
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;
}
return (long) (elt->year << 9) + (elt->month << 5) + elt->day;
}
char news_search_body (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
long i = msgno - 1;
news_fetchheader (stream,msgno);
return LOCAL->body[i] ?
search (LOCAL->body[i],strlen (LOCAL->body[i]),d,n) : NIL;
}
char news_search_subject (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
char *t = news_fetchstructure (stream,msgno,NIL)->subject;
return t ? search (t,strlen (t),d,n) : NIL;
}
char news_search_text (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
char *t = news_fetchheader (stream,msgno);
return (t && search (t,strlen (t),d,n)) ||
news_search_body (stream,msgno,d,n);
}
char news_search_bcc (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
ADDRESS *a = news_fetchstructure (stream,msgno,NIL)->bcc;
LOCAL->buf[0] = '\0'; /* initially empty string */
/* get text for address */
rfc822_write_address (LOCAL->buf,a);
return search (LOCAL->buf,(long) strlen (LOCAL->buf),d,n);
}
char news_search_cc (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
ADDRESS *a = news_fetchstructure (stream,msgno,NIL)->cc;
LOCAL->buf[0] = '\0'; /* initially empty string */
/* get text for address */
rfc822_write_address (LOCAL->buf,a);
return search (LOCAL->buf,(long) strlen (LOCAL->buf),d,n);
}
char news_search_from (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
ADDRESS *a = news_fetchstructure (stream,msgno,NIL)->from;
LOCAL->buf[0] = '\0'; /* initially empty string */
/* get text for address */
rfc822_write_address (LOCAL->buf,a);
return search (LOCAL->buf,(long) strlen (LOCAL->buf),d,n);
}
char news_search_to (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
ADDRESS *a = news_fetchstructure (stream,msgno,NIL)->to;
LOCAL->buf[0] = '\0'; /* initially empty string */
/* get text for address */
rfc822_write_address (LOCAL->buf,a);
return search (LOCAL->buf,(long) strlen (LOCAL->buf),d,n);
}
/* Search parsers */
/* Parse a date
* Accepts: function to return
* pointer to date integer to return
* Returns: function to return
*/
search_t news_search_date (f,n)
search_t f;
long *n;
{
long i;
char *s;
MESSAGECACHE elt;
/* parse the date and return fn if OK */
return (news_search_string (f,&s,&i) && mail_parse_date (&elt,s) &&
(*n = (elt.year << 9) + (elt.month << 5) + elt.day)) ? f : NIL;
}
/* Parse a flag
* Accepts: function to return
* pointer to string to return
* Returns: function to return
*/
search_t news_search_flag (f,d)
search_t f;
char **d;
{
/* get a keyword, return if OK */
return (*d = strtok (NIL," ")) ? f : NIL;
}
/* Parse a string
* Accepts: function to return
* pointer to string to return
* pointer to string length to return
* Returns: function to return
*/
search_t news_search_string (f,d,n)
search_t f;
char **d;
long *n;
{
char *end = " ";
char *c = strtok (NIL,""); /* remainder of criteria */
if (!c) return NIL; /* missing argument */
switch (*c) { /* see what the argument is */
case '{': /* literal string */
*n = strtol (c+1,d,10); /* get its length */
if ((*(*d)++ == '}') && (*(*d)++ == '\015') && (*(*d)++ == '\012') &&
(!(*(c = *d + *n)) || (*c == ' '))) {
char e = *--c;
*c = DELIM; /* make sure not a space */
strtok (c," "); /* reset the strtok mechanism */
*c = e; /* put character back */
break;
}
case '\0': /* catch bogons */
case ' ':
return NIL;
case '"': /* quoted string */
if (strchr (c+1,'"')) end = "\"";
else return NIL;
default: /* atomic string */
if (*d = strtok (c,end)) *n = strlen (*d);
else return NIL;
break;
}
return f;
}