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- /*
- * Program: Tenex 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: 22 May 1990
- * Last Edited: 15 July 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 "mail.h"
- #include "osdep.h"
- #include <pwd.h>
- #include <sys/file.h>
- #include <sys/stat.h>
- #include <sys/time.h>
- #include "tenex2.h"
- #include "rfc822.h"
- #include "misc.h"
-
- /* Tenex mail routines */
-
-
- /* Driver dispatch used by MAIL */
-
- DRIVER tenexdriver = {
- "tenex", /* driver name */
- (DRIVER *) NIL, /* next driver */
- tenex_valid, /* mailbox is valid for us */
- tenex_parameters, /* manipulate parameters */
- tenex_find, /* find mailboxes */
- tenex_find_bboards, /* find bboards */
- tenex_find_all, /* find all mailboxes */
- tenex_find_all_bboards, /* find all bboards */
- tenex_subscribe, /* subscribe to mailbox */
- tenex_unsubscribe, /* unsubscribe from mailbox */
- tenex_subscribe_bboard, /* subscribe to bboard */
- tenex_unsubscribe_bboard, /* unsubscribe from bboard */
- tenex_create, /* create mailbox */
- tenex_delete, /* delete mailbox */
- tenex_rename, /* rename mailbox */
- tenex_open, /* open mailbox */
- tenex_close, /* close mailbox */
- tenex_fetchfast, /* fetch message "fast" attributes */
- tenex_fetchflags, /* fetch message flags */
- tenex_fetchstructure, /* fetch message envelopes */
- tenex_fetchheader, /* fetch message header only */
- tenex_fetchtext, /* fetch message body only */
- tenex_fetchbody, /* fetch message body section */
- tenex_setflag, /* set message flag */
- tenex_clearflag, /* clear message flag */
- tenex_search, /* search for message based on criteria */
- tenex_ping, /* ping mailbox to see if still alive */
- tenex_check, /* check for new messages */
- tenex_expunge, /* expunge deleted messages */
- tenex_copy, /* copy messages to another mailbox */
- tenex_move, /* move messages to another mailbox */
- tenex_append, /* append string message to mailbox */
- tenex_gc /* garbage collect stream */
- };
-
- /* prototype stream */
- MAILSTREAM tenexproto = {&tenexdriver};
-
- /* Tenex mail validate mailbox
- * Accepts: mailbox name
- * Returns: our driver if name is valid, NIL otherwise
- */
-
- DRIVER *tenex_valid (char *name)
- {
- char tmp[MAILTMPLEN];
- return tenex_isvalid (name,tmp) ? &tenexdriver : NIL;
- }
-
-
- /* Tenex mail test for valid mailbox
- * Accepts: mailbox name
- * Returns: T if valid, NIL otherwise
- */
-
- long tenex_isvalid (char *name,char *tmp)
- {
- int i,fd;
- char *s;
- struct stat sbuf;
- struct hostent *host_name;
- if (!lhostn) { /* have local host yet? */
- gethostname(tmp,MAILTMPLEN);/* get local host name */
- lhostn = cpystr ((host_name = gethostbyname (tmp)) ?
- host_name->h_name : tmp);
- }
- /* if file, get its status */
- if ((*name != '{') && !((*name == '*') && (name[1] == '{')) &&
- (stat (tenex_file (tmp,name),&sbuf) == 0)) {
- if (sbuf.st_size != 0) { /* if non-empty file */
- if ((fd = open (tmp,O_RDONLY,NIL)) >= 0 && read (fd,tmp,64) >= 0) {
- close (fd); /* close the file */
- if (s = strchr (tmp,'\n')) {
- *s = '\0'; /* tie off header */
- /* must begin with dd-mmm-yy" */
- if (((tmp[2] == '-' && tmp[6] == '-') ||
- (tmp[1] == '-' && tmp[5] == '-')) &&
- (s = strchr (tmp+20,',')) && strchr (s+2,';')) return LONGT;
- }
- }
- }
- /* allow empty if a ".txt" file */
- else if ((i = strlen (tmp)) > 4 && !strcmp (tmp + i - 4 ,".txt"))
- return LONGT;
- }
- return NIL; /* failed miserably */
- }
-
-
- /* Tenex manipulate driver parameters
- * Accepts: function code
- * function-dependent value
- * Returns: function-dependent return value
- */
-
- void *tenex_parameters (long function,void *value)
- {
- fatal ("Invalid tenex_parameters function");
- return NIL;
- }
-
- /* Tenex mail find list of mailboxes
- * Accepts: mail stream
- * pattern to search
- */
-
- void tenex_find (MAILSTREAM *stream,char *pat)
- {
- void *s = NIL;
- char *t,tmp[MAILTMPLEN];
- while (t = sm_read (&s)) /* read subscription database */
- if ((*t != '{') && (*t != '*') &&
- strcmp (t,"INBOX") && pmatch (t,pat) && tenex_isvalid (t,tmp))
- mm_mailbox (t);
- }
-
-
- /* Tenex mail find list of bboards
- * Accepts: mail stream
- * pattern to search
- */
-
- void tenex_find_bboards (MAILSTREAM *stream,char *pat)
- {
- void *s = NIL;
- char *t,tmp[MAILTMPLEN];
- while (t = sm_read (&s)) /* read subscription database */
- if ((*t == '*') && (t[1] != '{') &&
- pmatch (t+1,pat) && tenex_isvalid (t+1,tmp))
- mm_bboard (t+1);
- }
-
- /* Tenex mail find list of all mailboxes
- * Accepts: mail stream
- * pattern to search
- */
-
- void tenex_find_all (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 = tenex_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) && (tenex_isvalid (file,tmp))) mm_mailbox (file);
- }
- closedir (dirp); /* flush directory */
- }
- }
-
- /* Tenex mail find list of all bboards
- * Accepts: mail stream
- * pattern to search
- */
-
- void tenex_find_all_bboards (MAILSTREAM *stream,char *pat)
- {
- DIR *dirp;
- struct direct *d;
- struct passwd *pw;
- char tmp[MAILTMPLEN],file[MAILTMPLEN];
- int i = 1;
- char *s;
- if (!((pw = getpwnam ("ftp")) && pw->pw_dir)) return;
- file[0] = '*'; /* bboard designator */
- /* directory specified in pattern? */
- if (s = strrchr (pat,'/')) strncpy (file + 1,pat,i += (++s) - pat);
- file[i] = '\0'; /* tie off prefix */
- sprintf (tmp,"%s/%s",pw->pw_dir,(file[1] == '/') ? file + 2 : file + 1);
- if (dirp = opendir (tmp)) { /* now open that directory */
- while (d = readdir (dirp)) {/* for each directory entry */
- strcpy (file + i,d->d_name);
- if (pmatch (file + 1,pat) && (tenex_isvalid (file,tmp)))
- mm_bboard (file + 1);
- }
- closedir (dirp); /* flush directory */
- }
- }
-
- /* Tenex mail subscribe to mailbox
- * Accepts: mail stream
- * mailbox to add to subscription list
- * Returns: T on success, NIL on failure
- */
-
- long tenex_subscribe (MAILSTREAM *stream,char *mailbox)
- {
- char tmp[MAILTMPLEN];
- return sm_subscribe (tenex_file (tmp,mailbox));
- }
-
-
- /* Tenex mail unsubscribe to mailbox
- * Accepts: mail stream
- * mailbox to delete from subscription list
- * Returns: T on success, NIL on failure
- */
-
- long tenex_unsubscribe (MAILSTREAM *stream,char *mailbox)
- {
- char tmp[MAILTMPLEN];
- return sm_unsubscribe (tenex_file (tmp,mailbox));
- }
-
-
- /* Tenex mail subscribe to bboard
- * Accepts: mail stream
- * bboard to add to subscription list
- * Returns: T on success, NIL on failure
- */
-
- long tenex_subscribe_bboard (MAILSTREAM *stream,char *mailbox)
- {
- return NIL; /* never valid for Tenex */
- }
-
-
- /* Tenex mail unsubscribe to bboard
- * Accepts: mail stream
- * bboard to delete from subscription list
- * Returns: T on success, NIL on failure
- */
-
- long tenex_unsubscribe_bboard (MAILSTREAM *stream,char *mailbox)
- {
- return NIL; /* never valid for Tenex */
- }
-
- /* Tenex mail create mailbox
- * Accepts: MAIL stream
- * mailbox name to create
- * Returns: T on success, NIL on failure
- */
-
- long tenex_create (MAILSTREAM *stream,char *mailbox)
- {
- char tmp[MAILTMPLEN];
- int i,fd;
- /* must be a ".txt" file */
- if ((i = strlen (mailbox)) < 4 || strcmp (mailbox + i - 4 ,".txt")) {
- mm_log ("Can't create mailbox: name must end with .txt",ERROR);
- return NIL;
- }
- if ((fd = open (tenex_file (tmp,mailbox),O_WRONLY|O_CREAT|O_EXCL,0600)) < 0){
- sprintf (tmp,"Can't create mailbox %s: %s",mailbox,strerror (errno));
- mm_log (tmp,ERROR);
- return NIL;
- }
- close (fd); /* close the file */
- return LONGT; /* return success */
- }
-
-
- /* Tenex mail delete mailbox
- * Accepts: MAIL stream
- * mailbox name to delete
- * Returns: T on success, NIL on failure
- */
-
- long tenex_delete (MAILSTREAM *stream,char *mailbox)
- {
- return tenex_rename (stream,mailbox,NIL);
- }
-
- /* Tenex mail rename mailbox
- * Accepts: MAIL stream
- * old mailbox name
- * new mailbox name (or NIL for delete)
- * Returns: T on success, NIL on failure
- */
-
- long tenex_rename (MAILSTREAM *stream,char *old,char *new)
- {
- long ret = T;
- char tmp[MAILTMPLEN],file[MAILTMPLEN],lock[MAILTMPLEN];
- int ld;
- int fd = open (tenex_file (file,old),O_RDONLY,NIL);
- /* lock out non c-client applications */
- if (fd < 0) { /* open mailbox */
- sprintf (tmp,"Can't open mailbox %s: %s",old,strerror (errno));
- mm_log (tmp,ERROR);
- return NIL;
- }
- /* get exclusive parse/append permission */
- if ((ld = tenex_lock (fd,lock,LOCK_EX)) < 0) {
- mm_log ("Unable to lock rename mailbox",ERROR);
- return NIL;
- }
- /* lock out other users */
- if (flock (fd,LOCK_EX|LOCK_NB)) {
- close (fd); /* couldn't lock, give up on it then */
- sprintf (tmp,"Mailbox %s is in use by another process",old);
- mm_log (tmp,ERROR);
- tenex_unlock (ld,lock); /* release exclusive parse/append permission */
- return NIL;
- }
- /* do the rename or delete operation */
- if (new ? rename (file,tenex_file (tmp,new)) : unlink (file)) {
- sprintf (tmp,"Can't %s mailbox %s: %s",new ? "rename" : "delete",old,
- strerror (errno));
- mm_log (tmp,ERROR);
- ret = NIL; /* set failure */
- }
- flock (fd,LOCK_UN); /* release lock on the file */
- tenex_unlock (ld,lock); /* release exclusive parse/append permission */
- close (fd); /* close the file */
- return ret; /* return success */
- }
-
- /* Tenex mail open
- * Accepts: stream to open
- * Returns: stream on success, NIL on failure
- */
-
- MAILSTREAM *tenex_open (MAILSTREAM *stream)
- {
- long i;
- int fd,ld;
- char *s,*t,*k;
- char tmp[MAILTMPLEN];
- struct stat sbuf;
- /* return prototype for OP_PROTOTYPE call */
- if (!stream) return &tenexproto;
- if (LOCAL) { /* close old file if stream being recycled */
- tenex_close (stream); /* dump and save the changes */
- stream->dtb = &tenexdriver; /* reattach this driver */
- mail_free_cache (stream); /* clean up cache */
- }
- else { /* flush old flagstring and flags if any */
- if (stream->flagstring) fs_give ((void **) &stream->flagstring);
- for (i = 0; i < NUSERFLAGS; ++i) stream->user_flags[i] = NIL;
- /* open .imapinit or .mminit file */
- if ((fd = open (strcat (strcpy (tmp,myhomedir ()),"/.imapinit"),
- O_RDONLY,NIL)) < 0)
- fd = open (strcat (strcpy (tmp,myhomedir ()),"/.mminit"),O_RDONLY,NIL);
- if (fd >= 0) { /* got an init file? */
- fstat (fd,&sbuf); /* yes, get size */
- read (fd,(s = stream->flagstring = (char *) fs_get (sbuf.st_size + 1)),
- sbuf.st_size); /* make readin area and read the file */
- close (fd); /* don't need the file any more */
- s[sbuf.st_size] = '\0'; /* tie it off */
- /* parse init file */
- while (*s && (t = strchr (s,'\n'))) {
- *t = '\0'; /* tie off line, find second space */
- if ((k = strchr (s,' ')) && (k = strchr (++k,' '))) {
- *k = '\0'; /* tie off two words, is it "set keywords"? */
- if (!strcmp (lcase (s),"set keywords")) {
- /* yes, get first keyword */
- k = strtok (++k,", ");
- /* until parsed all keywords or empty */
- for (i = 0; k && i < NUSERFLAGS; ++i) {
- /* set keyword, get next one */
- stream->user_flags[i] = k;
- k = strtok (NIL,", ");
- }
- break; /* don't need to look at rest of file */
- }
- }
- s = ++t; /* try next line */
- }
- }
- }
-
- /* force readonly if bboard */
- if (*stream->mailbox == '*') stream->readonly = T;
- if (stream->readonly ||
- (fd = open (tenex_file (tmp,stream->mailbox),O_RDWR,NIL)) < 0) {
- if ((fd = open (tenex_file (tmp,stream->mailbox),O_RDONLY,NIL)) < 0) {
- sprintf (tmp,"Can't open mailbox: %s",strerror (errno));
- mm_log (tmp,ERROR);
- return NIL;
- }
- else if (!stream->readonly) {/* got it, but readonly */
- mm_log ("Can't get write access to mailbox, access is readonly",WARN);
- stream->readonly = T;
- }
- }
- stream->local = fs_get (sizeof (TENEXLOCAL));
- /* note if an INBOX or not */
- LOCAL->inbox = !strcmp (ucase (stream->mailbox),"INBOX");
- if (*stream->mailbox != '*') {/* canonicalize the stream mailbox name */
- fs_give ((void **) &stream->mailbox);
- stream->mailbox = cpystr (tmp);
- }
- /* get shared parse permission */
- if ((ld = tenex_lock (fd,tmp,LOCK_SH)) < 0) {
- mm_log ("Unable to lock open mailbox",ERROR);
- return NIL;
- }
- flock(LOCAL->fd = fd,LOCK_SH);/* bind and lock the file */
- tenex_unlock (ld,tmp); /* release shared parse permission */
- LOCAL->filesize = 0; /* initialize parsed file size */
- LOCAL->buf = (char *) fs_get (MAXMESSAGESIZE + 1);
- LOCAL->buflen = MAXMESSAGESIZE;
- stream->sequence++; /* bump sequence number */
- /* parse mailbox */
- stream->nmsgs = stream->recent = 0;
- if (tenex_ping (stream) && !stream->nmsgs)
- mm_log ("Mailbox is empty",(long) NIL);
- return stream; /* return stream to caller */
- }
-
- /* Tenex mail close
- * Accepts: MAIL stream
- */
-
- void tenex_close (MAILSTREAM *stream)
- {
- if (stream && LOCAL) { /* only if a file is open */
- flock (LOCAL->fd,LOCK_UN); /* unlock local file */
- close (LOCAL->fd); /* close the local file */
- /* free local text 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 */
- }
- }
-
-
- /* Tenex mail fetch fast information
- * Accepts: MAIL stream
- * sequence
- */
-
- void tenex_fetchfast (MAILSTREAM *stream,char *sequence)
- {
- return; /* no-op for local mail */
- }
-
-
- /* Tenex mail fetch flags
- * Accepts: MAIL stream
- * sequence
- */
-
- void tenex_fetchflags (MAILSTREAM *stream,char *sequence)
- {
- return; /* no-op for local mail */
- }
-
- /* Tenex mail fetch 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 *tenex_fetchstructure (MAILSTREAM *stream,long msgno,BODY **body)
- {
- LONGCACHE *lelt;
- ENVELOPE **env;
- BODY **b;
- STRING bs;
- char *hdr,*text;
- unsigned long hdrsize;
- unsigned long hdrpos = tenex_header (stream,msgno,&hdrsize);
- unsigned long textsize = body ? tenex_size (stream,msgno) - hdrsize : 0;
- unsigned long i = max (hdrsize,textsize);
- 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);
- if (i > LOCAL->buflen) { /* make sure enough buffer space */
- fs_give ((void **) &LOCAL->buf);
- LOCAL->buf = (char *) fs_get ((LOCAL->buflen = i) + 1);
- }
- /* get to header position */
- lseek (LOCAL->fd,hdrpos,L_SET);
- /* read the header and text */
- read (LOCAL->fd,hdr = (char *) fs_get (hdrsize + 1),hdrsize);
- read (LOCAL->fd,text = (char *) fs_get (textsize + 1),textsize);
- hdr[hdrsize] = '\0'; /* make sure tied off */
- text[textsize] = '\0'; /* make sure tied off */
- INIT (&bs,mail_string,(void *) text,textsize);
- /* parse envelope and body */
- rfc822_parse_msg (env,body ? b : NIL,hdr,hdrsize,&bs,lhostn,LOCAL->buf);
- fs_give ((void **) &text);
- fs_give ((void **) &hdr);
- }
- if (body) *body = *b; /* return the body */
- return *env; /* return the envelope */
- }
-
- /* Tenex mail fetch message header
- * Accepts: MAIL stream
- * message # to fetch
- * Returns: message header in RFC822 format
- */
-
- char *tenex_fetchheader (MAILSTREAM *stream,long msgno)
- {
- unsigned long hdrsize;
- unsigned long hdrpos = tenex_header (stream,msgno,&hdrsize);
- char *s = (char *) fs_get (1 + hdrsize);
- s[hdrsize] = '\0'; /* tie off string */
- /* get to header position */
- lseek (LOCAL->fd,hdrpos,L_SET);
- read (LOCAL->fd,s,hdrsize); /* slurp the data */
- /* copy the string */
- strcrlfcpy (&LOCAL->buf,&LOCAL->buflen,s,hdrsize);
- fs_give ((void **) &s); /* flush readin buffer */
- return LOCAL->buf;
- }
-
-
- /* Tenex mail fetch message text (body only)
- * Accepts: MAIL stream
- * message # to fetch
- * Returns: message text in RFC822 format
- */
-
- char *tenex_fetchtext (MAILSTREAM *stream,long msgno)
- {
- unsigned long hdrsize;
- unsigned long hdrpos = tenex_header (stream,msgno,&hdrsize);
- unsigned long textsize = tenex_size (stream,msgno) - hdrsize;
- char *s = (char *) fs_get (1 + textsize);
- s[textsize] = '\0'; /* tie off string */
- /* mark message as seen */
- mail_elt (stream,msgno)->seen = T;
- /* recalculate status */
- tenex_update_status (stream,msgno,T);
- /* get to text position */
- lseek (LOCAL->fd,hdrpos + hdrsize,L_SET);
- read (LOCAL->fd,s,textsize); /* slurp the data */
- /* copy the string */
- strcrlfcpy (&LOCAL->buf,&LOCAL->buflen,s,textsize);
- fs_give ((void **) &s); /* flush readin buffer */
- return LOCAL->buf;
- }
-
- /* Tenex 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 *tenex_fetchbody (MAILSTREAM *stream,long m,char *s,unsigned long *len)
- {
- BODY *b;
- PART *pt;
- char *t;
- unsigned long i;
- unsigned long base;
- unsigned long offset = 0;
- unsigned long hdrpos = tenex_header (stream,m,&base);
- MESSAGECACHE *elt = mail_elt (stream,m);
- /* make sure have a body */
- if (!(tenex_fetchstructure (stream,m,&b) && b && s && *s &&
- ((i = strtol (s,&s,10)) > 0))) 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 message as seen */
- /* recalculate status */
- tenex_update_status (stream,m,T);
- /* move to that place in the data */
- lseek (LOCAL->fd,hdrpos + base + offset,L_SET);
- /* slurp the data */
- t = (char *) fs_get (1 + b->size.ibytes);
- read (LOCAL->fd,t,b->size.ibytes);
- rfc822_contents(&LOCAL->buf,&LOCAL->buflen,len,t,b->size.ibytes,b->encoding);
- fs_give ((void **) &t); /* flush readin buffer */
- return LOCAL->buf;
- }
-
- /* Tenex locate header for a message
- * Accepts: MAIL stream
- * message number
- * pointer to returned header size
- * Returns: position of header in file
- */
-
- unsigned long tenex_header (MAILSTREAM *stream,long msgno,unsigned long *size)
- {
- long siz;
- long i = 0;
- char c = '\0';
- char *s = NIL;
- MESSAGECACHE *elt = mail_elt (stream,msgno);
- long pos = elt->data1 + (elt->data2 >> 24);
- long msiz = tenex_size (stream,msgno);
- /* is size known? */
- if (!(*size = (elt->data2 & (unsigned long) 0xffffff))) {
- lseek (LOCAL->fd,pos,L_SET);/* get to header position */
- /* search message for LF LF */
- for (siz = 0; siz < msiz; siz++) {
- if (--i <= 0) /* read another buffer as necessary */
- read (LOCAL->fd,s = LOCAL->buf,i = min (msiz-siz,(long) MAILTMPLEN));
- /* two newline sequence? */
- if ((c == '\012') && (*s == '\012')) {
- /* yes, note for later */
- elt->data2 |= (*size = siz + 1);
- return pos; /* return to caller */
- }
- else c = *s++; /* next character */
- }
- }
- return pos; /* have position */
- }
-
- /* Tenex mail set flag
- * Accepts: MAIL stream
- * sequence
- * flag(s)
- */
-
- void tenex_setflag (MAILSTREAM *stream,char *sequence,char *flag)
- {
- MESSAGECACHE *elt;
- long i;
- long uf;
- short f;
- /* no-op if no flags to modify */
- if (!((f = tenex_getflags (stream,flag,&uf)) || uf)) return;
- /* get sequence and loop on it */
- if (mail_sequence (stream,sequence)) for (i = 1; i <= stream->nmsgs; i++)
- if ((elt = tenex_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;
- elt->user_flags |= uf;
- /* recalculate status */
- tenex_update_status (stream,i,NIL);
- }
- /* make sure the update takes */
- if (!stream->readonly) fsync (LOCAL->fd);
- }
-
- /* Tenex mail clear flag
- * Accepts: MAIL stream
- * sequence
- * flag(s)
- */
-
- void tenex_clearflag (MAILSTREAM *stream,char *sequence,char *flag)
- {
- MESSAGECACHE *elt;
- long i;
- long uf;
- short f;
- /* no-op if no flags to modify */
- if (!((f = tenex_getflags (stream,flag,&uf)) || uf)) return;
- /* get sequence and loop on it */
- if (mail_sequence (stream,sequence)) for (i = 1; i <= stream->nmsgs; i++)
- if ((elt = tenex_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;
- elt->user_flags &= ~uf;
- /* recalculate status */
- tenex_update_status (stream,i,NIL);
- }
- /* make sure the update takes */
- if (!stream->readonly) fsync (LOCAL->fd);
- }
-
- /* Tenex mail search for messages
- * Accepts: MAIL stream
- * search criteria
- */
-
- void tenex_search (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 = tenex_search_all;
- else if (!strcmp (criteria+1,"NSWERED")) f = tenex_search_answered;
- break;
- case 'B': /* possible BCC, BEFORE, BODY */
- if (!strcmp (criteria+1,"CC"))
- f = tenex_search_string (tenex_search_bcc,&d,&n);
- else if (!strcmp (criteria+1,"EFORE"))
- f = tenex_search_date (tenex_search_before,&n);
- else if (!strcmp (criteria+1,"ODY"))
- f = tenex_search_string (tenex_search_body,&d,&n);
- break;
- case 'C': /* possible CC */
- if (!strcmp (criteria+1,"C"))
- f = tenex_search_string (tenex_search_cc,&d,&n);
- break;
- case 'D': /* possible DELETED */
- if (!strcmp (criteria+1,"ELETED")) f = tenex_search_deleted;
- break;
- case 'F': /* possible FLAGGED, FROM */
- if (!strcmp (criteria+1,"LAGGED")) f = tenex_search_flagged;
- else if (!strcmp (criteria+1,"ROM"))
- f = tenex_search_string (tenex_search_from,&d,&n);
- break;
- case 'K': /* possible KEYWORD */
- if (!strcmp (criteria+1,"EYWORD"))
- f = tenex_search_flag (tenex_search_keyword,&n,stream);
- break;
- case 'N': /* possible NEW */
- if (!strcmp (criteria+1,"EW")) f = tenex_search_new;
- break;
-
- case 'O': /* possible OLD, ON */
- if (!strcmp (criteria+1,"LD")) f = tenex_search_old;
- else if (!strcmp (criteria+1,"N"))
- f = tenex_search_date (tenex_search_on,&n);
- break;
- case 'R': /* possible RECENT */
- if (!strcmp (criteria+1,"ECENT")) f = tenex_search_recent;
- break;
- case 'S': /* possible SEEN, SINCE, SUBJECT */
- if (!strcmp (criteria+1,"EEN")) f = tenex_search_seen;
- else if (!strcmp (criteria+1,"INCE"))
- f = tenex_search_date (tenex_search_since,&n);
- else if (!strcmp (criteria+1,"UBJECT"))
- f = tenex_search_string (tenex_search_subject,&d,&n);
- break;
- case 'T': /* possible TEXT, TO */
- if (!strcmp (criteria+1,"EXT"))
- f = tenex_search_string (tenex_search_text,&d,&n);
- else if (!strcmp (criteria+1,"O"))
- f = tenex_search_string (tenex_search_to,&d,&n);
- break;
- case 'U': /* possible UN* */
- if (criteria[1] == 'N') {
- if (!strcmp (criteria+2,"ANSWERED")) f = tenex_search_unanswered;
- else if (!strcmp (criteria+2,"DELETED")) f = tenex_search_undeleted;
- else if (!strcmp (criteria+2,"FLAGGED")) f = tenex_search_unflagged;
- else if (!strcmp (criteria+2,"KEYWORD"))
- f = tenex_search_flag (tenex_search_unkeyword,&n,stream);
- else if (!strcmp (criteria+2,"SEEN")) f = tenex_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);
- }
- }
-
- /* Tenex mail ping mailbox
- * Accepts: MAIL stream
- * Returns: T if stream still alive, NIL if not
- */
-
- long tenex_ping (MAILSTREAM *stream)
- {
- long r = NIL;
- int ld;
- char lock[MAILTMPLEN];
- if (stream && LOCAL) { /* only if stream already open */
- /* get shared parse/append permission */
- if ((ld = tenex_lock (LOCAL->fd,lock,LOCK_SH)) >= 0) {
- /* parse resulting mailbox */
- r = (tenex_parse (stream)) ? T : NIL;
- tenex_unlock (ld,lock); /* release shared parse/append permission */
- }
- /* snarf if this is a read-write inbox */
- if (stream && LOCAL && LOCAL->inbox && !stream->readonly) {
- tenex_snarf (stream);
- /* get shared parse/append permission */
- if ((ld = tenex_lock (LOCAL->fd,lock,LOCK_SH)) >= 0) {
- /* parse resulting mailbox */
- r = (tenex_parse (stream)) ? T : NIL;
- tenex_unlock (ld,lock); /* release shared parse/append permission */
- }
- }
- }
- return r; /* return result of the parse */
- }
-
-
- /* Tenex mail check mailbox (reparses status too)
- * Accepts: MAIL stream
- */
-
- void tenex_check (MAILSTREAM *stream)
- {
- long i = 1;
- if (tenex_ping (stream)) { /* ping mailbox */
- /* get new message status */
- while (i <= stream->nmsgs) tenex_elt (stream,i++);
- mm_log ("Check completed",(long) NIL);
- }
- }
-
- /* Tenex mail snarf messages from bezerk inbox
- * Accepts: MAIL stream
- */
-
- void tenex_snarf (MAILSTREAM *stream)
- {
- long i = 0;
- long r,j;
- struct stat sbuf;
- struct iovec iov[2];
- char lock[MAILTMPLEN];
- MAILSTREAM *bezerk = NIL;
- int ld = tenex_lock (LOCAL->fd,lock,LOCK_EX);
- if (ld < 0) return; /* give up if can't get exclusive permission */
- mm_critical (stream); /* go critical */
- /* calculate name of bezerk file */
- sprintf (LOCAL->buf,MAILFILE,myusername ());
- stat (LOCAL->buf,&sbuf); /* see if anything there */
- if (sbuf.st_size) { /* non-empty? */
- fstat (LOCAL->fd,&sbuf); /* yes, get current file size */
- if ((sbuf.st_size == LOCAL->filesize) &&
- (bezerk = mail_open (bezerk,LOCAL->buf,OP_SILENT)) &&
- (r = bezerk->nmsgs)) { /* sizes match and can get bezerk mailbox? */
- /* yes, go to end of file in our mailbox */
- lseek (LOCAL->fd,sbuf.st_size,L_SET);
- /* for each message in bezerk mailbox */
- while (r && (++i <= bezerk->nmsgs)) {
- /* snarf message from Berkeley mailbox */
- iov[1].iov_base = bezerk_snarf (bezerk,i,&j);
- /* calculate header line */
- mail_date ((iov[0].iov_base = LOCAL->buf),mail_elt (bezerk,i));
- sprintf (LOCAL->buf + strlen (LOCAL->buf),",%d;000000000000\n",
- iov[1].iov_len = j);
- iov[0].iov_len = strlen (iov[0].iov_base);
- /* copy message to new mailbox */
- if (writev (LOCAL->fd,iov,2) < 0) {
- sprintf (LOCAL->buf,"Can't copy new mail: %s",strerror (errno));
- mm_log (LOCAL->buf,ERROR);
- ftruncate (LOCAL->fd,sbuf.st_size);
- r = 0; /* flag that we have lost big */
- }
- }
- if (r) { /* delete all the messages we copied */
- for (i = 1; i <= r; i++) mail_elt (bezerk,i)->deleted = T;
- mail_expunge (bezerk);/* now expunge all those messages */
- }
- }
- if (bezerk) mail_close (bezerk);
- }
- mm_nocritical (stream); /* release critical */
- tenex_unlock (ld,lock); /* release exclusive parse/append permission */
- }
-
- /* Tenex mail expunge mailbox
- * Accepts: MAIL stream
- */
-
- void tenex_expunge (MAILSTREAM *stream)
- {
- int ld;
- unsigned long i = 1;
- unsigned long j,k,m,recent;
- unsigned long n = 0;
- unsigned long delta = 0;
- char lock[MAILTMPLEN];
- MESSAGECACHE *elt;
- /* do nothing if stream dead */
- if (!tenex_ping (stream)) return;
- if (stream->readonly) { /* won't do on readonly files! */
- mm_log ("Expunge ignored on readonly mailbox",WARN);
- return;
- }
- /* The cretins who designed flock() created a window of vulnerability in
- * upgrading locks from shared to exclusive or downgrading from exclusive
- * to shared. Rather than maintain the lock at shared status at a minimum,
- * flock() actually *releases* the former lock. Obviously they never talked
- * to any database guys. Fortunately, we have the parse/append permission
- * lock. If we require this lock before going exclusive on the mailbox,
- * another process can not sneak in and steal the exclusive mailbox lock on
- * us, because it will block on trying to get parse/append permission first.
- */
- /* get exclusive parse/append permission */
- if ((ld = tenex_lock (LOCAL->fd,lock,LOCK_EX)) < 0) {
- mm_log ("Unable to lock expunge mailbox",ERROR);
- return;
- }
- /* get exclusive access */
- if (flock (LOCAL->fd,LOCK_EX|LOCK_NB)) {
- flock (LOCAL->fd,LOCK_SH); /* recover previous lock */
- mm_log("Can't expunge because mailbox is in use by another process",ERROR);
- tenex_unlock (ld,lock); /* release exclusive parse/append permission */
- return;
- }
-
- mm_critical (stream); /* go critical */
- recent = stream->recent; /* get recent now that pinged and locked */
- while (i <= stream->nmsgs) { /* for each message */
- /* number of bytes to smash or preserve */
- k = ((elt = tenex_elt (stream,i))->data2 >> 24) + tenex_size (stream,i);
- if (elt->deleted) { /* if deleted */
- if (elt->recent) --recent;/* if recent, note one less recent message */
- delta += k; /* number of bytes to delete */
- mail_expunged (stream,i); /* notify upper levels */
- n++; /* count up one more expunged message */
- }
- else if (i++ && delta) { /* preserved message */
- j = elt->data1; /* first byte to preserve */
- do { /* read from source position */
- m = min (k,LOCAL->buflen);
- lseek (LOCAL->fd,j,L_SET);
- read (LOCAL->fd,LOCAL->buf,(unsigned int) m);
- /* write to destination position */
- lseek (LOCAL->fd,j - delta,L_SET);
- write (LOCAL->fd,LOCAL->buf,(unsigned int) m);
- j += m; /* next chunk, perhaps */
- } while (k -= m); /* until done */
- elt->data1 -= delta; /* note the new address of this text */
- }
- }
- if (n) { /* truncate file after last message */
- ftruncate (LOCAL->fd,LOCAL->filesize -= delta);
- sprintf (LOCAL->buf,"Expunged %ld messages",n);
- /* output the news */
- 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);
- flock (LOCAL->fd,LOCK_SH); /* allow sharers again */
- tenex_unlock (ld,lock); /* release exclusive parse/append permission */
- }
-
- /* Tenex mail copy message(s)
- * Accepts: MAIL stream
- * sequence
- * destination mailbox
- * Returns: T if success, NIL if failed
- */
-
- long tenex_copy (MAILSTREAM *stream,char *sequence,char *mailbox)
- {
- /* copy the messages */
- return (mail_sequence (stream,sequence)) ?
- tenex_copy_messages (stream,mailbox) : NIL;
- }
-
-
- /* Tenex mail move message(s)
- * Accepts: MAIL stream
- * sequence
- * destination mailbox
- * Returns: T if success, NIL if failed
- */
-
- long tenex_move (MAILSTREAM *stream,char *sequence,char *mailbox)
- {
- long i;
- MESSAGECACHE *elt;
- if (!(mail_sequence (stream,sequence) &&
- tenex_copy_messages (stream,mailbox))) return NIL;
- /* delete all requested messages */
- for (i = 1; i <= stream->nmsgs; i++)
- if ((elt = tenex_elt (stream,i))->sequence) {
- elt->deleted = T; /* mark message deleted */
- /* recalculate status */
- tenex_update_status (stream,i,NIL);
- }
- /* make sure the update takes */
- if (!stream->readonly) fsync (LOCAL->fd);
- return LONGT;
- }
-
- /* Tenex mail append message from stringstruct
- * Accepts: MAIL stream
- * destination mailbox
- * stringstruct of messages to append
- * Returns: T if append successful, else NIL
- */
-
- long tenex_append (MAILSTREAM *stream,char *mailbox,STRING *message)
- {
- struct stat sbuf;
- char c,*s,*t,tmp[MAILTMPLEN],lock[MAILTMPLEN];
- int fd,ld;
- long i = SIZE (message);
- long size = 0;
- long ret = LONGT;
- /* N.B.: can't use LOCAL->buf for tmp */
- /* make sure valid mailbox */
- if (!tenex_isvalid (mailbox,tmp)) {
- sprintf (tmp,"Not a Tenex-format mailbox: %s",mailbox);
- mm_log (tmp,ERROR);
- return NIL;
- }
- if ((fd = open (tenex_file (tmp,mailbox),O_RDWR|O_CREAT,
- S_IREAD|S_IWRITE)) < 0) {
- sprintf (tmp,"Can't open append mailbox: %s",strerror (errno));
- mm_log (tmp,ERROR);
- return NIL;
- }
- /* get exclusive parse/append permission */
- if ((ld = tenex_lock (fd,lock,LOCK_EX)) < 0) {
- mm_log ("Unable to lock append mailbox",ERROR);
- return NIL;
- }
- s = 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 */
- fstat (fd,&sbuf); /* get current file size */
- lseek (fd,sbuf.st_size,L_SET);/* move to end of file */
- rfc822_date (tmp); /* get the date in RFC822 format */
- tmp[4] = '0'; /* in case 1-digit day */
- t = tmp[7] == ' ' ? tmp+5 : tmp+4;
- t[2] = t[6] = '-'; /* convert date string to Tenex format */
- /* add remainder of header */
- sprintf (t+26,",%ld;000000000000\n",size);
- /* write header */
- if ((write (fd,t,strlen (t)) < 0) || ((write (fd,s,size)) < 0)) {
- sprintf (tmp,"Message append failed: %s",strerror (errno));
- mm_log (tmp,ERROR);
- ftruncate (fd,sbuf.st_size);
- ret = NIL;
- }
- fsync (fd); /* force out the update */
- tenex_unlock (ld,lock); /* release exclusive parse/append permission */
- close (fd); /* close the file */
- mm_nocritical (stream); /* release critical */
- fs_give ((void **) &s); /* flush the buffer */
- return ret;
- }
-
- /* Tenex garbage collect stream
- * Accepts: Mail stream
- * garbage collection flags
- */
-
- void tenex_gc (MAILSTREAM *stream,long gcflags)
- {
- /* nothing here for now */
- }
-
- /* Internal routines */
-
-
- /* Tenex mail lock file for parse/append permission
- * Accepts: file descriptor
- * lock file name buffer
- * type of locking operation (LOCK_SH or LOCK_EX)
- * Returns: file descriptor of lock or -1 if failure
- */
-
- int tenex_lock (int fd,char *lock,int op)
- {
- int ld;
- struct stat sbuf;
- /* get data for this file */
- if (fstat (fd,&sbuf)) return -1;
- /* make temporary file name */
- sprintf (lock,"/tmp/.%hx.%lx",sbuf.st_dev,sbuf.st_ino);
- if ((ld = open (lock,O_RDWR|O_CREAT,0666)) < 0) return NIL;
- flock (ld,op); /* get this lock */
- return ld; /* return locking file descriptor */
- }
-
-
- /* Tenex mail unlock file for parse/append permission
- * Accepts: file descriptor
- * lock file name from tenex_lock()
- */
-
- void tenex_unlock (int fd,char *lock)
- {
- unlink (lock); /* delete the file */
- flock (fd,LOCK_UN); /* unlock it */
- close (fd); /* close it */
- }
-
- /* Tenex mail return internal message size in bytes
- * Accepts: MAIL stream
- * message #
- * Returns: internal size of message
- */
-
- unsigned long tenex_size (MAILSTREAM *stream,long m)
- {
- MESSAGECACHE *elt = mail_elt (stream,m);
- return ((m < stream->nmsgs) ? mail_elt (stream,m+1)->data1 : LOCAL->filesize)
- - (elt->data1 + (elt->data2 >> 24));
- }
-
-
- /* Tenex mail generate file string
- * Accepts: temporary buffer to write into
- * mailbox name string
- * Returns: local file string
- */
-
- char *tenex_file (char *dst,char *name)
- {
- struct passwd *pw;
- char *s,*t,tmp[MAILTMPLEN];
- switch (*name) {
- case '*': /* bboard? */
- sprintf (tmp,"~ftp/%s",(name[1] == '/') ? name+2 : name+1);
- dst = tenex_file (dst,tmp);/* recurse to get result */
- break;
- 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: /* other name - INBOX becomes mail.txt */
- if (!strcmp (ucase (strcpy (dst,name)),"INBOX")) name = "mail.txt";
- sprintf (dst,"%s/%s",myhomedir (),name);
- }
- return dst;
- }
-
- /* Parse flag list
- * Accepts: MAIL stream
- * flag list as a character string
- * pointer to user flags to return
- * Returns: system flags
- */
-
- long tenex_getflags (MAILSTREAM *stream,char *flag,long *uf)
- {
- char key[MAILTMPLEN];
- char *t,*s;
- short f = 0;
- long i;
- short j;
- *uf = 0; /* initially no user flags */
- 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'; /* tie off tail */
- /* make uppercase, find first, parse */
- if (t = strtok (ucase (LOCAL->buf)," ")) do {
- i = 0; /* no flag yet */
- /* system flag, dispatch on first character */
- if (*t == '\\') switch (*++t) {
- case 'S': /* possible \Seen flag */
- if (t[1] == 'E' && t[2] == 'E' && t[3] == 'N' && t[4] == '\0')
- f |= i = fSEEN;
- 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' && t[7] == '\0') f |= i = fDELETED;
- 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' && t[7] == '\0') f |= i = fFLAGGED;
- 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' && t[8] == '\0')
- f |= i = fANSWERED;
- break;
- default: /* unknown */
- break;
- }
-
- /* user flag, search through table */
- else for (j = 0; !i && j < NUSERFLAGS && (s =stream->user_flags[j]); ++j)
- if (!strcmp (t,ucase (strcpy (key,s)))) *uf |= i = 1 << j;
- if (!i) { /* didn't find a matching flag? */
- sprintf (key,"Unknown flag: %.80s",t);
- mm_log (key,ERROR);
- *uf = NIL; /* be sure no user flags returned */
- return NIL; /* return no system flags */
- }
- /* parse next flag */
- } while (t = strtok (NIL," "));
- }
- return f;
- }
-
- /* Tenex mail parse mailbox
- * Accepts: MAIL stream
- * Returns: T if parse OK
- * NIL if failure, stream aborted
- */
-
- long tenex_parse (MAILSTREAM *stream)
- {
- struct stat sbuf;
- MESSAGECACHE *elt = NIL;
- char *s,*t;
- char tmp[MAILTMPLEN];
- long i,j,msiz;
- long curpos = LOCAL->filesize;
- long nmsgs = stream->nmsgs;
- long recent = stream->recent;
- fstat (LOCAL->fd,&sbuf); /* get status */
- if (sbuf.st_size < curpos) { /* sanity check */
- mm_log ("Mailbox shrank!",ERROR);
- tenex_close (stream);
- return NIL;
- }
- /* while there is stuff to parse */
- while (i = sbuf.st_size - curpos) {
- /* get to that position in the file */
- lseek (LOCAL->fd,curpos,L_SET);
- if (!((read (LOCAL->fd,tmp,64) > 0) && (s = strchr (tmp,'\012')))) {
- sprintf (tmp,"Unable to read internal header line at %ld",curpos);
- mm_log (tmp,ERROR);
- tenex_close (stream);
- return NIL;
- }
- *s = '\0'; /* tie off header line */
- i = (s + 1) - tmp; /* note start of text offset */
- if (!((s = strchr (tmp,',')) && (t = strchr (s+1,';')))) {
- sprintf (tmp,"Unable to parse internal header line at %ld",curpos);
- mm_log (tmp,ERROR);
- tenex_close (stream);
- return NIL;
- }
- *s++ = '\0'; *t++ = '\0'; /* tie off fields */
- /* intantiate an elt for this message */
- elt = mail_elt (stream,++nmsgs);
- elt->data1 = curpos; /* note file offset of header */
- elt->data2 = i << 24; /* as well as offset from header of message */
- /* parse the header components */
- if (!(mail_parse_date (elt,tmp) &&
- (elt->rfc822_size = msiz = strtol (s,&s,10)) && (!(s && *s)) &&
- isdigit (t[0]) && isdigit (t[1]) && isdigit (t[2]) &&
- isdigit (t[3]) && isdigit (t[4]) && isdigit (t[5]) &&
- isdigit (t[6]) && isdigit (t[7]) && isdigit (t[8]) &&
- isdigit (t[9]) && isdigit (t[10]) && isdigit (t[11]) && !t[12])) {
- sprintf (tmp,"Unable to parse internal header line components at %ld",
- curpos);
- mm_log (tmp,ERROR);
- tenex_close (stream);
- return NIL;
- }
-
- /* calculate system flags */
- if ((j = ((t[10]-'0') * 8) + t[11]-'0') & fSEEN) elt->seen = T;
- if (j & fDELETED) elt->deleted = T;
- if (j & fFLAGGED) elt->flagged = T;
- if (j & fANSWERED) elt->answered = T;
- if (!(j & fOLD)) { /* newly arrived message? */
- elt->recent = T;
- recent++; /* count up a new recent message */
- /* mark it as old */
- tenex_update_status (stream,nmsgs,NIL);
- }
- /* start at first message byte */
- lseek (LOCAL->fd,curpos += i,L_SET);
- for (i = msiz; i;) { /* for all bytes of the message */
- /* read a buffer's worth */
- read (LOCAL->fd,tmp,j = min (i,(long) MAILTMPLEN));
- i -= j; /* account for having read that much */
- /* now count the CRLFs */
- while (j) if (tmp[--j] == '\n') elt->rfc822_size++;
- }
- /* make sure didn't run off end of file */
- if ((curpos += msiz) > sbuf.st_size) {
- mm_log ("Last message runs past end of file",ERROR);
- tenex_close (stream);
- return NIL;
- }
- }
- fsync (LOCAL->fd); /* make sure all the fOLD flags take */
- /* update parsed file size */
- LOCAL->filesize = sbuf.st_size;
- mail_exists (stream,nmsgs); /* notify upper level of new mailbox size */
- mail_recent (stream,recent); /* and of change in recent messages */
- return LONGT; /* return the winnage */
- }
-
- /* Tenex copy messages
- * Accepts: MAIL stream
- * mailbox copy vector
- * mailbox name
- * Returns: T if success, NIL if failed
- */
-
- long tenex_copy_messages (MAILSTREAM *stream,char *mailbox)
- {
- struct stat sbuf;
- MESSAGECACHE *elt;
- unsigned long i,j,k;
- int fd,ld;
- char lock[MAILTMPLEN];
- /* make sure valid mailbox */
- if (!tenex_isvalid (mailbox,LOCAL->buf)) {
- sprintf (LOCAL->buf,"Not a Tenex-format mailbox: %s",mailbox);
- mm_log (LOCAL->buf,ERROR);
- return NIL;
- }
- /* got file? */
- if ((fd = open (tenex_file (LOCAL->buf,mailbox),O_RDWR|O_CREAT,
- S_IREAD|S_IWRITE)) < 0) {
- sprintf (LOCAL->buf,"Unable to open copy mailbox: %s",strerror (errno));
- mm_log (LOCAL->buf,ERROR);
- return NIL;
- }
- mm_critical (stream); /* go critical */
- /* get exclusive parse/append permission */
- if ((ld = tenex_lock (fd,lock,LOCK_EX)) < 0) {
- mm_log ("Unable to lock copy mailbox",ERROR);
- return NIL;
- }
- fstat (fd,&sbuf); /* get current file size */
- lseek (fd,sbuf.st_size,L_SET);/* move to end of file */
-
- /* for each requested message */
- for (i = 1; i <= stream->nmsgs; i++)
- if ((elt = mail_elt (stream,i))->sequence) {
- lseek (LOCAL->fd,tenex_header (stream,i,&k),L_SET);
- j = 0; /* mark first time through */
- do { /* read from source position */
- if (j) { /* get another message chunk */
- k = min (j,LOCAL->buflen);
- read (LOCAL->fd,LOCAL->buf,(unsigned int) k);
- }
- else { /* first time through */
- /* make a header */
- mail_date (LOCAL->buf,elt);
- sprintf (LOCAL->buf + strlen (LOCAL->buf),",%d;000000000000\012",
- j = tenex_size (stream,i));
- /* add size of header string */
- j += (k = strlen (LOCAL->buf));
- }
- if (write (fd,LOCAL->buf,(unsigned int) k) < 0) {
- sprintf (LOCAL->buf,"Unable to write message: %s",strerror (errno));
- mm_log (LOCAL->buf,ERROR);
- ftruncate (fd,sbuf.st_size);
- /* release exclusive parse/append permission */
- tenex_unlock (ld,lock);
- close (fd); /* punt */
- mm_nocritical (stream);
- return NIL;
- }
- } while (j -= k); /* until done */
- }
- fsync (fd); /* force out the update */
- tenex_unlock (ld,lock); /* release exclusive parse/append permission */
- close (fd); /* close the file */
- mm_nocritical (stream); /* release critical */
- return LONGT;
- }
-
- /* Tenex get cache element with status updating from file
- * Accepts: MAIL stream
- * message number
- * Returns: cache element
- */
-
- MESSAGECACHE *tenex_elt (MAILSTREAM *stream,long msgno)
- {
- unsigned long i,j;
- char c;
- MESSAGECACHE *elt = mail_elt (stream,msgno);
- /* set the seek pointer */
- lseek (LOCAL->fd,(off_t) elt->data1 + (elt->data2 >> 24) - 13,L_SET);
- /* read the new flags */
- if (read (LOCAL->fd,LOCAL->buf,12) < 0) {
- sprintf (LOCAL->buf,"Unable to read new status: %s",strerror (errno));
- fatal (LOCAL->buf);
- }
- /* calculate system flags */
- elt->seen = (i = ((LOCAL->buf[10]-'0') * 8) + LOCAL->buf[11]-'0') & fSEEN ?
- T : NIL;
- elt->deleted = i & fDELETED ? T : NIL;
- elt->flagged = i & fFLAGGED ? T : NIL;
- elt->answered = i & fANSWERED ? T : NIL;
- c = LOCAL->buf[10]; /* remember first system flags byte */
- LOCAL->buf[10] = '\0'; /* tie off flags */
- j = strtol (LOCAL->buf,NIL,8);/* get user flags value */
- LOCAL->buf[10] = c; /* restore first system flags byte */
- /* set up all valid user flags (reversed!) */
- while (j) if (((i = 29 - find_rightmost_bit (&j)) < NUSERFLAGS) &&
- stream->user_flags[i]) elt->user_flags |= 1 << i;
- return elt;
- }
-
- /* Tenex update status string
- * Accepts: MAIL stream
- * message number
- * flag saying whether or not to sync
- */
-
- void tenex_update_status (MAILSTREAM *stream,long msgno,long syncflag)
- {
- MESSAGECACHE *elt = mail_elt (stream,msgno);
- unsigned long j,k = 0;
- if (!stream->readonly) { /* not if readonly you don't */
- j = elt->user_flags; /* get user flags */
- /* reverse bits (dontcha wish we had CIRC?) */
- while (j) k |= 1 << (29 - find_rightmost_bit (&j));
- /* print new flag string */
- sprintf (LOCAL->buf,"%010lo%02o",k,
- fOLD + (fSEEN * elt->seen) + (fDELETED * elt->deleted) +
- (fFLAGGED * elt->flagged) + (fANSWERED * elt->answered));
- /* get to that place in the file */
- lseek (LOCAL->fd,(off_t) elt->data1 + (elt->data2 >> 24) - 13,L_SET);
- /* write new flags */
- write (LOCAL->fd,LOCAL->buf,12);
- /* sync if requested */
- if (syncflag) fsync (LOCAL->fd);
- }
- }
-
- /* Search support routines
- * Accepts: MAIL stream
- * message number
- * pointer to additional data
- * Returns: T if search matches, else NIL
- */
-
-
- char tenex_search_all (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- return T; /* ALL always succeeds */
- }
-
-
- char tenex_search_answered (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- return mail_elt (stream,msgno)->answered ? T : NIL;
- }
-
-
- char tenex_search_deleted (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- return mail_elt (stream,msgno)->deleted ? T : NIL;
- }
-
-
- char tenex_search_flagged (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- return mail_elt (stream,msgno)->flagged ? T : NIL;
- }
-
-
- char tenex_search_keyword (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- return mail_elt (stream,msgno)->user_flags & n ? T : NIL;
- }
-
-
- char tenex_search_new (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- MESSAGECACHE *elt = mail_elt (stream,msgno);
- return (elt->recent && !elt->seen) ? T : NIL;
- }
-
- char tenex_search_old (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- return mail_elt (stream,msgno)->recent ? NIL : T;
- }
-
-
- char tenex_search_recent (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- return mail_elt (stream,msgno)->recent ? T : NIL;
- }
-
-
- char tenex_search_seen (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- return mail_elt (stream,msgno)->seen ? T : NIL;
- }
-
-
- char tenex_search_unanswered (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- return mail_elt (stream,msgno)->answered ? NIL : T;
- }
-
-
- char tenex_search_undeleted (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- return mail_elt (stream,msgno)->deleted ? NIL : T;
- }
-
-
- char tenex_search_unflagged (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- return mail_elt (stream,msgno)->flagged ? NIL : T;
- }
-
-
- char tenex_search_unkeyword (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- return mail_elt (stream,msgno)->user_flags & n ? NIL : T;
- }
-
-
- char tenex_search_unseen (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- return mail_elt (stream,msgno)->seen ? NIL : T;
- }
-
- char tenex_search_before (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- MESSAGECACHE *elt = mail_elt (stream,msgno);
- return (char) ((long)((elt->year << 9) + (elt->month << 5) + elt->day) < n);
- }
-
-
- char tenex_search_on (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- MESSAGECACHE *elt = mail_elt (stream,msgno);
- return (char) (((elt->year << 9) + (elt->month << 5) + elt->day) == n);
- }
-
-
- char tenex_search_since (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- /* everybody interprets "since" as .GE. */
- MESSAGECACHE *elt = mail_elt (stream,msgno);
- return (char) ((long)((elt->year << 9) + (elt->month << 5) + elt->day) >= n);
- }
-
-
- char tenex_search_body (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- char ret;
- unsigned long hdrsize;
- unsigned long hdrpos = tenex_header (stream,msgno,&hdrsize);
- unsigned long textsize = tenex_size (stream,msgno) - hdrsize;
- char *s = (char *) fs_get (1 + textsize);
- s[textsize] = '\0'; /* tie off string */
- /* recalculate status */
- tenex_update_status (stream,msgno,T);
- /* get to text position */
- lseek (LOCAL->fd,hdrpos + hdrsize,L_SET);
- read (LOCAL->fd,s,textsize); /* slurp the data */
- /* copy the string */
- ret = search (s,textsize,d,n);/* do the search */
- fs_give ((void **) &s); /* flush readin buffer */
- return ret; /* return search value */
- }
-
-
- char tenex_search_subject (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- char *s = tenex_fetchstructure (stream,msgno,NIL)->subject;
- return s ? search (s,(long) strlen (s),d,n) : NIL;
- }
-
-
- char tenex_search_text (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- char ret;
- unsigned long hdrsize;
- unsigned long hdrpos = tenex_header (stream,msgno,&hdrsize);
- char *s = (char *) fs_get (1 + hdrsize);
- s[hdrsize] = '\0'; /* tie off string */
- /* get to header position */
- lseek (LOCAL->fd,hdrpos,L_SET);
- read (LOCAL->fd,s,hdrsize); /* slurp the data */
- ret = search (s,hdrsize,d,n) || tenex_search_body (stream,msgno,d,n);
- fs_give ((void **) &s); /* flush readin buffer */
- return ret; /* return search value */
- }
-
- char tenex_search_bcc (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- LOCAL->buf[0] = '\0'; /* initially empty string */
- /* get text for address */
- rfc822_write_address (LOCAL->buf,
- tenex_fetchstructure (stream,msgno,NIL)->bcc);
- return search (LOCAL->buf,(long) strlen (LOCAL->buf),d,n);
- }
-
-
- char tenex_search_cc (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- LOCAL->buf[0] = '\0'; /* initially empty string */
- /* get text for address */
- rfc822_write_address (LOCAL->buf,
- tenex_fetchstructure (stream,msgno,NIL)->cc);
- return search (LOCAL->buf,(long) strlen (LOCAL->buf),d,n);
- }
-
-
- char tenex_search_from (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- LOCAL->buf[0] = '\0'; /* initially empty string */
- /* get text for address */
- rfc822_write_address (LOCAL->buf,
- tenex_fetchstructure (stream,msgno,NIL)->from);
- return search (LOCAL->buf,(long) strlen (LOCAL->buf),d,n);
- }
-
-
- char tenex_search_to (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- LOCAL->buf[0] = '\0'; /* initially empty string */
- /* get text for address */
- rfc822_write_address (LOCAL->buf,
- tenex_fetchstructure (stream,msgno,NIL)->to);
- 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 tenex_search_date (search_t f,long *n)
- {
- long i;
- char *s;
- MESSAGECACHE elt;
- /* parse the date and return fn if OK */
- return (tenex_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 keyword integer to return
- * MAIL stream
- * Returns: function to return
- */
-
- search_t tenex_search_flag (search_t f,long *n,MAILSTREAM *stream)
- {
- short i;
- char *s,*t;
- if (t = strtok (NIL," ")) { /* get a keyword */
- ucase (t); /* get uppercase form of flag */
- for (i = 0; i < NUSERFLAGS && (s = stream->user_flags[i]); ++i)
- if (!strcmp (t,ucase (strcpy (LOCAL->buf,s))) && (*n = 1 << i)) return f;
- }
- return NIL; /* couldn't find keyword */
- }
-
- /* Parse a string
- * Accepts: function to return
- * pointer to string to return
- * pointer to string length to return
- * Returns: function to return
- */
-
-
- search_t tenex_search_string (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;
- }
-