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mh.c
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1994-01-09
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/*
* 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
*
* Andrew Cohen
* Internet: cohen@bucrf16.bu.edu
*
* Date: 23 February 1992
* Last Edited: 18 November 1993
*
* Copyright 1993 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 <netdb.h>
#include <errno.h>
extern int errno; /* just in case */
#include <sys/types.h>
#include "mail.h"
#include "osdep.h"
#include <pwd.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/time.h>
#include "mh.h"
#include "rfc822.h"
#include "misc.h"
/* MH mail routines */
/* Driver dispatch used by MAIL */
DRIVER mhdriver = {
"mh", /* driver name */
(DRIVER *) NIL, /* next driver */
mh_valid, /* mailbox is valid for us */
mh_parameters, /* manipulate parameters */
mh_find, /* find mailboxes */
mh_find_bboards, /* find bboards */
mh_find_all, /* find all mailboxes */
mh_find_all_bboards, /* find all bboards */
mh_subscribe, /* subscribe to mailbox */
mh_unsubscribe, /* unsubscribe from mailbox */
mh_subscribe_bboard, /* subscribe to bboard */
mh_unsubscribe_bboard, /* unsubscribe from bboard */
mh_create, /* create mailbox */
mh_delete, /* delete mailbox */
mh_rename, /* rename 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 */
mh_setflag, /* set message flag */
mh_clearflag, /* clear message flag */
mh_search, /* 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_move, /* move 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 (name)
char *name;
{
char tmp[MAILTMPLEN];
return mh_isvalid (name,tmp) ? &mhdriver : NIL;
}
/* MH mail test for valid mailbox
* Accepts: mailbox name
* Returns: T if valid, NIL otherwise
*/
int mh_isvalid (name,tmp)
char *name;
char *tmp;
{
struct stat sbuf;
/* if file, get its status */
return (*name != '{' && *name != '.' &&
(stat (mh_file (tmp,name),&sbuf) == 0) &&
(sbuf.st_mode & S_IFMT) == S_IFDIR);
}
/* MH mail build file name
* Accepts: destination string
* source
* Returns: destination
*/
char *mh_file (dst,name)
char *dst;
char *name;
{
#if 0
struct passwd *pw;
char *s,*t,tmp[MAILTMPLEN];
switch (*name) {
case '/': /* absolute file path */
strcpy (dst,name); /* copy the mailbox name */
break;
case '~': /* home directory */
if (name[1] == '/') t = myhomedir ();
else {
strcpy (tmp,name + 1); /* copy user name */
if (s = strchr (tmp,'/')) *s = '\0';
t = ((pw = getpwnam (tmp)) && pw->pw_dir) ? pw->pw_dir : "/NOSUCHUSER";
}
sprintf (dst,"%s%s",t,(s = strchr (name,'/')) ? s : "");
break;
default: /* relative path, goes in Mail folder */
sprintf (dst,"%s/Mail/%s",myhomedir (),name);
break;
}
#else
sprintf (dst,"%s/Mail/%s",myhomedir (),name);
#endif
return dst;
}
/* MH manipulate driver parameters
* Accepts: function code
* function-dependent value
* Returns: function-dependent return value
*/
void *mh_parameters (function,value)
long function;
void *value;
{
fatal ("Invalid mh_parameters function");
return NIL;
}
/* MH mail find list of mailboxes
* Accepts: mail stream
* pattern to search
*/
void mh_find (stream,pat)
MAILSTREAM *stream;
char *pat;
{
void *s = NIL;
char *t,tmp[MAILTMPLEN];
while (t = sm_read (&s)) /* read subscription database */
if ((*t != '{') && strcmp (t,"INBOX") && pmatch (t,pat) &&
mh_isvalid (t,tmp)) mm_mailbox (t);
}
/* MH mail find list of bboards
* Accepts: mail stream
* pattern to search
*/
void mh_find_bboards (stream,pat)
MAILSTREAM *stream;
char *pat;
{
/* Always a no-op */
}
/* MH mail find list of all mailboxes
* Accepts: mail stream
* pattern to search
*/
void mh_find_all (stream,pat)
MAILSTREAM *stream;
char *pat;
{
DIR *dirp;
struct direct *d;
char tmp[MAILTMPLEN],file[MAILTMPLEN];
int i = 0;
char *s,*t;
if (s = strrchr (pat,'/')) { /* directory specified in pattern? */
strncpy (file,pat,i = (++s) - pat);
file[i] = '\0'; /* tie off prefix */
t = mh_file (tmp,pat); /* make fully-qualified file name */
/* tie off directory name */
if (s = strrchr (t,'/')) *s = '\0';
}
else t = myhomedir (); /* use home directory to search */
if (dirp = opendir (t)) { /* now open that directory */
while (d = readdir (dirp)) {/* for each directory entry */
strcpy (file + i,d->d_name);
if (pmatch (file,pat) && (mh_isvalid (file,tmp))) mm_mailbox (file);
}
closedir (dirp); /* flush directory */
}
}
/* MH mail find list of all bboards
* Accepts: mail stream
* pattern to search
*/
void mh_find_all_bboards (stream,pat)
MAILSTREAM *stream;
char *pat;
{
/* Always a no-op */
}
/* MH mail subscribe to mailbox
* Accepts: mail stream
* mailbox to add to subscription list
* Returns: T on success, NIL on failure
*/
long mh_subscribe (stream,mailbox)
MAILSTREAM *stream;
char *mailbox;
{
char tmp[MAILTMPLEN];
return sm_subscribe (mh_file (tmp,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 (stream,mailbox)
MAILSTREAM *stream;
char *mailbox;
{
char tmp[MAILTMPLEN];
return sm_unsubscribe (mh_file (tmp,mailbox));
}
/* MH mail subscribe to bboard
* Accepts: mail stream
* bboard to add to subscription list
* Returns: T on success, NIL on failure
*/
long mh_subscribe_bboard (stream,mailbox)
MAILSTREAM *stream;
char *mailbox;
{
return NIL; /* never valid for MH */
}
/* MH mail unsubscribe to bboard
* Accepts: mail stream
* bboard to delete from subscription list
* Returns: T on success, NIL on failure
*/
long mh_unsubscribe_bboard (stream,mailbox)
MAILSTREAM *stream;
char *mailbox;
{
return NIL; /* never valid for MH */
}
/* MH mail create mailbox
* Accepts: mail stream
* mailbox name to create
* Returns: T on success, NIL on failure
*/
long mh_create (stream,mailbox)
MAILSTREAM *stream;
char *mailbox;
{
return NIL; /* this driver is read-only */
}
/* MH mail delete mailbox
* mailbox name to delete
* Returns: T on success, NIL on failure
*/
long mh_delete (stream,mailbox)
MAILSTREAM *stream;
char *mailbox;
{
return NIL; /* this driver is read-only */
}
/* MH mail rename mailbox
* Accepts: MH mail stream
* old mailbox name
* new mailbox name
* Returns: T on success, NIL on failure
*/
long mh_rename (stream,old,new)
MAILSTREAM *stream;
char *old;
char *new;
{
return NIL; /* this driver is read-only */
}
/* MH mail open
* Accepts: stream to open
* Returns: stream on success, NIL on failure
*/
MAILSTREAM *mh_open (stream)
MAILSTREAM *stream;
{
long i,nmsgs;
long recent = 0;
char tmp[MAILTMPLEN];
struct hostent *host_name;
struct direct **names;
if (!stream) return &mhproto; /* return prototype for OP_PROTOTYPE call */
if (LOCAL) { /* close old file if stream being recycled */
mh_close (stream); /* dump and save the changes */
stream->dtb = &mhdriver; /* reattach this driver */
mail_free_cache (stream); /* clean up cache */
}
mh_file (tmp,stream->mailbox);/* canonicalize the stream mailbox name */
if (!strcmp (tmp,stream->mailbox)) {
fs_give ((void **) &stream->mailbox);
stream->mailbox = cpystr (tmp);
}
if (!lhostn) { /* have local host yet? */
gethostname(tmp,MAILTMPLEN);/* get local host name */
lhostn = cpystr ((host_name = gethostbyname (tmp)) ?
host_name->h_name : tmp);
}
/* scan directory */
if ((nmsgs = scandir (tmp,&names,mh_select,mh_numsort)) >= 0) {
stream->local = fs_get (sizeof (MHLOCAL));
LOCAL->dirty = NIL; /* no update to .mhrc needed yet */
LOCAL->dir = cpystr (tmp); /* copy directory name for later */
/* 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 *));
LOCAL->seen = (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;
LOCAL->seen[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->readonly = T; /* make sure higher level knows readonly */
mail_exists (stream,nmsgs); /* notify upper level that messages exist */
while (i < nmsgs) { /* mark all remaining messages as new */
LOCAL->seen[i++] = NIL;
mail_elt (stream,i)->recent = T;
++recent; /* count another recent message */
}
mail_recent (stream,recent);/* notify upper level about recent */
/* notify if empty bboard */
if (!(stream->nmsgs || stream->silent)) mm_log ("folder is empty",WARN);
}
return LOCAL ? stream : NIL; /* if stream is alive, return to caller */
}
/* MH file name selection test
* Accepts: candidate directory entry
* Returns: T to use file name, NIL to skip it
*/
int mh_select (name)
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 (d1,d2)
struct direct **d1;
struct direct **d2;
{
return (atoi ((*d1)->d_name) - atoi ((*d2)->d_name));
}
/* MH mail close
* Accepts: MAIL stream
*/
void mh_close (stream)
MAILSTREAM *stream;
{
if (LOCAL) { /* only if a file is open */
mh_check (stream); /* dump final checkpoint */
if (LOCAL->dir) fs_give ((void **) &LOCAL->dir);
mh_gc (stream,GC_TEXTS); /* free local cache */
fs_give ((void **) &LOCAL->number);
fs_give ((void **) &LOCAL->header);
fs_give ((void **) &LOCAL->body);
fs_give ((void **) &LOCAL->seen);
/* 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 */
}
}
/* MH mail fetch fast information
* Accepts: MAIL stream
* sequence
*/
void mh_fetchfast (stream,sequence)
MAILSTREAM *stream;
char *sequence;
{
return; /* no-op for local mail */
}
/* MH mail fetch flags
* Accepts: MAIL stream
* sequence
*/
void mh_fetchflags (stream,sequence)
MAILSTREAM *stream;
char *sequence;
{
return; /* no-op for local mail */
}
/* MH mail fetch message structure
* 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 *mh_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 = mh_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,lhostn,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
* Returns: message header in RFC822 format
*/
char *mh_fetchheader (stream,msgno)
MAILSTREAM *stream;
long msgno;
{
unsigned long i,j;
int fd;
char *s,*b,*t;
long m = msgno - 1;
long lst = NIL;
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 and count lines */
for (i=1,b=s; *b && !(lst && (*b == '\n'));) if (lst = (*b++ == '\n')) i++;
/* copy header in CRLF form */
LOCAL->header[m] = (char *) fs_get (i += (j = b - s));
elt->rfc822_size = i - 1; /* size of message header */
strcrlfcpy (&LOCAL->header[m],&i,s,j);
/* copy body in CRLF form */
for (i = 1,t = b; *t;) if (*t++ == '\n') i++;
LOCAL->body[m] = (char *) fs_get (i += (j = t - b));
elt->rfc822_size += i - 1; /* size of entire message */
strcrlfcpy (&LOCAL->body[m],&i,b,j);
fs_give ((void **) &s); /* flush old data */
}
return LOCAL->header[m] ? LOCAL->header[m] : "";
}
/* MH mail fetch message text (only)
body only;
* Accepts: MAIL stream
* message # to fetch
* Returns: message text in RFC822 format
*/
char *mh_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 */
mh_fetchheader (stream,msgno);
if (!elt->seen) { /* if message not seen before */
elt->seen = T; /* mark as seen */
LOCAL->dirty = T; /* and that stream is now dirty */
}
LOCAL->seen[i] = T;
return LOCAL->body[i] ? LOCAL->body[i] : "";
}
/* 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 (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 (!(mh_fetchstructure (stream,m,&b) && b && s && *s &&
((i = strtol (s,&s,10)) > 0) && (base = mh_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 */
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;
if (!elt->seen) { /* if message not seen before */
elt->seen = T; /* mark as seen */
LOCAL->dirty = T; /* and that stream is now dirty */
}
LOCAL->seen[m-1] = T;
return rfc822_contents (&LOCAL->buf,&LOCAL->buflen,len,base + offset,
b->size.ibytes,b->encoding);
}
/* MH mail set flag
* Accepts: MAIL stream
* sequence
* flag(s)
*/
void mh_setflag (stream,sequence,flag)
MAILSTREAM *stream;
char *sequence;
char *flag;
{
MESSAGECACHE *elt;
long i;
short f = mh_getflags (stream,flag);
short f1 = f & (fSEEN|fDELETED);
if (!f) return; /* no-op if no flags to modify */
/* get sequence and loop on it */
if (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 (f1 && !LOCAL->seen[i - 1]) LOCAL->seen[i - 1] = LOCAL->dirty = T;
}
}
/* MH mail clear flag
* Accepts: MAIL stream
* sequence
* flag(s)
*/
void mh_clearflag (stream,sequence,flag)
MAILSTREAM *stream;
char *sequence;
char *flag;
{
MESSAGECACHE *elt;
long i = stream->nmsgs;
short f = mh_getflags (stream,flag);
short f1 = f & (fSEEN|fDELETED);
if (!f) return; /* no-op if no flags to modify */
/* get sequence and loop on it */
if (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;
/* clearing either seen or deleted does this */
if (f1 && LOCAL->seen[i - 1]) {
LOCAL->seen[i - 1] = NIL;
LOCAL->dirty = T; /* mark stream as dirty */
}
}
}
/* MH mail search for messages
* Accepts: MAIL stream
* search criteria
*/
void mh_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 = mh_search_all;
else if (!strcmp (criteria+1,"NSWERED")) f = mh_search_answered;
break;
case 'B': /* possible BCC, BEFORE, BODY */
if (!strcmp (criteria+1,"CC"))
f = mh_search_string (mh_search_bcc,&d,&n);
else if (!strcmp (criteria+1,"EFORE"))
f = mh_search_date (mh_search_before,&n);
else if (!strcmp (criteria+1,"ODY"))
f = mh_search_string (mh_search_body,&d,&n);
break;
case 'C': /* possible CC */
if (!strcmp (criteria+1,"C"))
f = mh_search_string (mh_search_cc,&d,&n);
break;
case 'D': /* possible DELETED */
if (!strcmp (criteria+1,"ELETED")) f = mh_search_deleted;
break;
case 'F': /* possible FLAGGED, FROM */
if (!strcmp (criteria+1,"LAGGED")) f = mh_search_flagged;
else if (!strcmp (criteria+1,"ROM"))
f = mh_search_string (mh_search_from,&d,&n);
break;
case 'K': /* possible KEYWORD */
if (!strcmp (criteria+1,"EYWORD"))
f = mh_search_flag (mh_search_keyword,&d);
break;
case 'N': /* possible NEW */
if (!strcmp (criteria+1,"EW")) f = mh_search_new;
break;
case 'O': /* possible OLD, ON */
if (!strcmp (criteria+1,"LD")) f = mh_search_old;
else if (!strcmp (criteria+1,"N"))
f = mh_search_date (mh_search_on,&n);
break;
case 'R': /* possible RECENT */
if (!strcmp (criteria+1,"ECENT")) f = mh_search_recent;
break;
case 'S': /* possible SEEN, SINCE, SUBJECT */
if (!strcmp (criteria+1,"EEN")) f = mh_search_seen;
else if (!strcmp (criteria+1,"INCE"))
f = mh_search_date (mh_search_since,&n);
else if (!strcmp (criteria+1,"UBJECT"))
f = mh_search_string (mh_search_subject,&d,&n);
break;
case 'T': /* possible TEXT, TO */
if (!strcmp (criteria+1,"EXT"))
f = mh_search_string (mh_search_text,&d,&n);
else if (!strcmp (criteria+1,"O"))
f = mh_search_string (mh_search_to,&d,&n);
break;
case 'U': /* possible UN* */
if (criteria[1] == 'N') {
if (!strcmp (criteria+2,"ANSWERED")) f = mh_search_unanswered;
else if (!strcmp (criteria+2,"DELETED")) f = mh_search_undeleted;
else if (!strcmp (criteria+2,"FLAGGED")) f = mh_search_unflagged;
else if (!strcmp (criteria+2,"KEYWORD"))
f = mh_search_flag (mh_search_unkeyword,&d);
else if (!strcmp (criteria+2,"SEEN")) f = mh_search_unseen;
}
break;
default: /* we will barf below */
break;
}
if (!f) { /* if can't determine any criteria */
sprintf (LOCAL->buf,"Unknown search criterion: %s",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);
}
}
/* MH mail ping mailbox
* Accepts: MAIL stream
* Returns: T if stream alive, else NIL
*/
long mh_ping (stream)
MAILSTREAM *stream;
{
return T; /* always alive */
}
/* MH mail check mailbox
* Accepts: MAIL stream
*/
void mh_check (stream)
MAILSTREAM *stream;
{
/* A no-op for starters */
}
/* MH mail expunge mailbox
* Accepts: MAIL stream
*/
void mh_expunge (stream)
MAILSTREAM *stream;
{
if (!stream->silent) mm_log ("Expunge ignored on readonly mailbox",NIL);
}
/* MH mail copy message(s)
s;
* Accepts: MAIL stream
* sequence
* destination mailbox
* Returns: T if copy successful, else NIL
*/
long mh_copy (stream,sequence,mailbox)
MAILSTREAM *stream;
char *sequence;
char *mailbox;
{
mm_log ("Copy not valid for read-only mh mailbox",ERROR);
return NIL;
}
/* MH mail move message(s)
s;
* Accepts: MAIL stream
* sequence
* destination mailbox
* Returns: T if move successful, else NIL
*/
long mh_move (stream,sequence,mailbox)
MAILSTREAM *stream;
char *sequence;
char *mailbox;
{
mm_log ("Move not valid for read-only mh mailbox",ERROR);
return NIL;
}
/* 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 (stream,mailbox,message)
MAILSTREAM *stream;
char *mailbox;
STRING *message;
{
mm_log ("Append not valid for read-only mh mailbox",ERROR);
return NIL;
}
/* MH garbage collect stream
* Accepts: Mail stream
* garbage collection flags
*/
void mh_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 mh_getflags (stream,flag)
MAILSTREAM *stream;
char *flag;
{
char *t;
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 (LOCAL->buf,flag+i,(j = strlen (flag) - (2*i)));
LOCAL->buf[j] = '\0';
t = ucase (LOCAL->buf); /* uppercase only from now on */
while (*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 { /* bitch about bogus flag */
mm_log ("Unknown system flag",ERROR);
return NIL;
}
}
else { /* no user flags yet */
mm_log ("Unknown flag",ERROR);
return NIL;
}
}
}
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 mh_search_all (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return T; /* ALL always succeeds */
}
char mh_search_answered (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return mail_elt (stream,msgno)->answered ? T : NIL;
}
char mh_search_deleted (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return mail_elt (stream,msgno)->deleted ? T : NIL;
}
char mh_search_flagged (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return mail_elt (stream,msgno)->flagged ? T : NIL;
}
char mh_search_keyword (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return NIL; /* keywords not supported yet */
}
char mh_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 mh_search_old (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return mail_elt (stream,msgno)->recent ? NIL : T;
}
char mh_search_recent (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return mail_elt (stream,msgno)->recent ? T : NIL;
}
char mh_search_seen (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return mail_elt (stream,msgno)->seen ? T : NIL;
}
char mh_search_unanswered (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return mail_elt (stream,msgno)->answered ? NIL : T;
}
char mh_search_undeleted (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return mail_elt (stream,msgno)->deleted ? NIL : T;
}
char mh_search_unflagged (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return mail_elt (stream,msgno)->flagged ? NIL : T;
}
char mh_search_unkeyword (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return T; /* keywords not supported yet */
}
char mh_search_unseen (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return mail_elt (stream,msgno)->seen ? NIL : T;
}
char mh_search_before (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return (char) (mh_msgdate (stream,msgno) < n);
}
char mh_search_on (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
return (char) (mh_msgdate (stream,msgno) == n);
}
char mh_search_since (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
/* everybody interprets "since" as .GE. */
return (char) (mh_msgdate (stream,msgno) >= n);
}
unsigned long mh_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 mh_search_body (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
long i = msgno - 1;
mh_fetchheader (stream,msgno);
return LOCAL->body[i] ?
search (LOCAL->body[i],strlen (LOCAL->body[i]),d,n) : NIL;
}
char mh_search_subject (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
char *t = mh_fetchstructure (stream,msgno,NIL)->subject;
return t ? search (t,strlen (t),d,n) : NIL;
}
char mh_search_text (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
char *t = mh_fetchheader (stream,msgno);
return (t && search (t,strlen (t),d,n)) ||
mh_search_body (stream,msgno,d,n);
}
char mh_search_bcc (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
ADDRESS *a = mh_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 mh_search_cc (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
ADDRESS *a = mh_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 mh_search_from (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
ADDRESS *a = mh_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 mh_search_to (stream,msgno,d,n)
MAILSTREAM *stream;
long msgno;
char *d;
long n;
{
ADDRESS *a = mh_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 mh_search_date (f,n)
search_t f;
long *n;
{
long i;
char *s;
MESSAGECACHE elt;
/* parse the date and return fn if OK */
return (mh_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 mh_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 mh_search_string (f,d,n)
search_t f;
char **d;
long *n;
{
char *c = strtok (NIL,""); /* remainder of criteria */
if (c) { /* better be an argument */
switch (*c) { /* see what the argument is */
case '\0': /* catch bogons */
case ' ':
return NIL;
case '"': /* quoted string */
if (!(strchr (c+1,'"') && (*d = strtok (c,"\"")) && (*n = strlen (*d))))
return NIL;
break;
case '{': /* literal string */
*n = strtol (c+1,&c,10); /* get its length */
if (*c++ != '}' || *c++ != '\015' || *c++ != '\012' ||
*n > strlen (*d = c)) return NIL;
c[*n] = '\255'; /* write new delimiter */
strtok (c,"\255"); /* reset the strtok mechanism */
break;
default: /* atomic string */
*n = strlen (*d = strtok (c," "));
break;
}
return f;
}
else return NIL;
}