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diff --git a/imap/src/osdep/unix/tenex.c b/imap/src/osdep/unix/tenex.c
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+/* ========================================================================
+ * Copyright 1988-2007 University of Washington
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *
+ * ========================================================================
+ */
+
+/*
+ * Program: 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: 11 October 2007
+ */
+
+
+/* FILE TIME SEMANTICS
+ *
+ * The atime is the last read time of the file.
+ * The mtime is the last flags update time of the file.
+ * The ctime is the last write time of the file.
+ *
+ * TEXT SIZE SEMANTICS
+ *
+ * Most of the text sizes are in internal (LF-only) form, except for the
+ * msg.text size. Beware.
+ */
+
+#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 "misc.h"
+#include "dummy.h"
+
+/* TENEX I/O stream local data */
+
+typedef struct tenex_local {
+ unsigned int shouldcheck: 1; /* if ping should do a check instead */
+ unsigned int mustcheck: 1; /* if ping must do a check instead */
+ int fd; /* file descriptor for I/O */
+ off_t filesize; /* file size parsed */
+ time_t filetime; /* last file time */
+ time_t lastsnarf; /* local snarf time */
+ unsigned char *buf; /* temporary buffer */
+ unsigned long buflen; /* current size of temporary buffer */
+ unsigned long uid; /* current text uid */
+ SIZEDTEXT text; /* current text */
+} TENEXLOCAL;
+
+
+/* Convenient access to local data */
+
+#define LOCAL ((TENEXLOCAL *) stream->local)
+
+
+/* Function prototypes */
+
+DRIVER *tenex_valid (char *name);
+int tenex_isvalid (char *name,char *tmp);
+void *tenex_parameters (long function,void *value);
+void tenex_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents);
+void tenex_list (MAILSTREAM *stream,char *ref,char *pat);
+void tenex_lsub (MAILSTREAM *stream,char *ref,char *pat);
+long tenex_create (MAILSTREAM *stream,char *mailbox);
+long tenex_delete (MAILSTREAM *stream,char *mailbox);
+long tenex_rename (MAILSTREAM *stream,char *old,char *newname);
+long tenex_status (MAILSTREAM *stream,char *mbx,long flags);
+MAILSTREAM *tenex_open (MAILSTREAM *stream);
+void tenex_close (MAILSTREAM *stream,long options);
+void tenex_fast (MAILSTREAM *stream,char *sequence,long flags);
+void tenex_flags (MAILSTREAM *stream,char *sequence,long flags);
+char *tenex_header (MAILSTREAM *stream,unsigned long msgno,
+ unsigned long *length,long flags);
+long tenex_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags);
+void tenex_flag (MAILSTREAM *stream,char *sequence,char *flag,long flags);
+void tenex_flagmsg (MAILSTREAM *stream,MESSAGECACHE *elt);
+long tenex_ping (MAILSTREAM *stream);
+void tenex_check (MAILSTREAM *stream);
+void tenex_snarf (MAILSTREAM *stream);
+long tenex_expunge (MAILSTREAM *stream,char *sequence,long options);
+long tenex_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options);
+long tenex_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data);
+
+unsigned long tenex_size (MAILSTREAM *stream,unsigned long m);
+char *tenex_file (char *dst,char *name);
+long tenex_parse (MAILSTREAM *stream);
+MESSAGECACHE *tenex_elt (MAILSTREAM *stream,unsigned long msgno);
+void tenex_read_flags (MAILSTREAM *stream,MESSAGECACHE *elt);
+void tenex_update_status (MAILSTREAM *stream,unsigned long msgno,
+ long syncflag);
+unsigned long tenex_hdrpos (MAILSTREAM *stream,unsigned long msgno,
+ unsigned long *size);
+
+/* Tenex mail routines */
+
+
+/* Driver dispatch used by MAIL */
+
+DRIVER tenexdriver = {
+ "tenex", /* driver name */
+ DR_LOCAL|DR_MAIL|DR_NOSTICKY|DR_LOCKING,
+ /* driver flags */
+ (DRIVER *) NIL, /* next driver */
+ tenex_valid, /* mailbox is valid for us */
+ tenex_parameters, /* manipulate parameters */
+ tenex_scan, /* scan mailboxes */
+ tenex_list, /* list mailboxes */
+ tenex_lsub, /* list subscribed mailboxes */
+ NIL, /* subscribe to mailbox */
+ NIL, /* unsubscribe from mailbox */
+ dummy_create, /* create mailbox */
+ tenex_delete, /* delete mailbox */
+ tenex_rename, /* rename mailbox */
+ tenex_status, /* status of mailbox */
+ tenex_open, /* open mailbox */
+ tenex_close, /* close mailbox */
+ tenex_fast, /* fetch message "fast" attributes */
+ tenex_flags, /* fetch message flags */
+ NIL, /* fetch overview */
+ NIL, /* fetch message envelopes */
+ tenex_header, /* fetch message header */
+ tenex_text, /* fetch message body */
+ NIL, /* fetch partial message text */
+ NIL, /* unique identifier */
+ NIL, /* message number */
+ tenex_flag, /* modify flags */
+ tenex_flagmsg, /* per-message modify flags */
+ NIL, /* search for message based on criteria */
+ NIL, /* sort messages */
+ NIL, /* thread messages */
+ 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_append, /* append string message to mailbox */
+ NIL /* 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
+ */
+
+int tenex_isvalid (char *name,char *tmp)
+{
+ int fd;
+ int ret = NIL;
+ char *s,file[MAILTMPLEN];
+ struct stat sbuf;
+ time_t tp[2];
+ errno = EINVAL; /* assume invalid argument */
+ /* if file, get its status */
+ if ((s = tenex_file (file,name)) && !stat (s,&sbuf)) {
+ if (!sbuf.st_size) { /* allow empty file if INBOX */
+ if ((s = mailboxfile (tmp,name)) && !*s) ret = T;
+ else errno = 0; /* empty file */
+ }
+ else if ((fd = open (file,O_RDONLY,NIL)) >= 0) {
+ memset (tmp,'\0',MAILTMPLEN);
+ if ((read (fd,tmp,64) >= 0) && (s = strchr (tmp,'\012')) &&
+ (s[-1] != '\015')) { /* valid format? */
+ *s = '\0'; /* tie off header */
+ /* must begin with dd-mmm-yy" */
+ ret = (((tmp[2] == '-' && tmp[6] == '-') ||
+ (tmp[1] == '-' && tmp[5] == '-')) &&
+ (s = strchr (tmp+18,',')) && strchr (s+2,';')) ? T : NIL;
+ }
+ else errno = -1; /* bogus format */
+ close (fd); /* close the file */
+ /* \Marked status? */
+ if (sbuf.st_ctime > sbuf.st_atime) {
+ tp[0] = sbuf.st_atime; /* preserve atime and mtime */
+ tp[1] = sbuf.st_mtime;
+ utime (file,tp); /* set the times */
+ }
+ }
+ }
+ /* in case INBOX but not tenex format */
+ else if ((errno == ENOENT) && !compare_cstring (name,"INBOX")) errno = -1;
+ return ret; /* return what we should */
+}
+
+/* Tenex manipulate driver parameters
+ * Accepts: function code
+ * function-dependent value
+ * Returns: function-dependent return value
+ */
+
+void *tenex_parameters (long function,void *value)
+{
+ void *ret = NIL;
+ switch ((int) function) {
+ case GET_INBOXPATH:
+ if (value) ret = tenex_file ((char *) value,"INBOX");
+ break;
+ }
+ return ret;
+}
+
+
+/* Tenex mail scan mailboxes
+ * Accepts: mail stream
+ * reference
+ * pattern to search
+ * string to scan
+ */
+
+void tenex_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents)
+{
+ if (stream) dummy_scan (NIL,ref,pat,contents);
+}
+
+
+/* Tenex mail list mailboxes
+ * Accepts: mail stream
+ * reference
+ * pattern to search
+ */
+
+void tenex_list (MAILSTREAM *stream,char *ref,char *pat)
+{
+ if (stream) dummy_list (NIL,ref,pat);
+}
+
+
+/* Tenex mail list subscribed mailboxes
+ * Accepts: mail stream
+ * reference
+ * pattern to search
+ */
+
+void tenex_lsub (MAILSTREAM *stream,char *ref,char *pat)
+{
+ if (stream) dummy_lsub (NIL,ref,pat);
+}
+
+/* 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 *newname)
+{
+ long ret = T;
+ char c,*s,tmp[MAILTMPLEN],file[MAILTMPLEN],lock[MAILTMPLEN];
+ int fd,ld;
+ struct stat sbuf;
+ if (!tenex_file (file,old) ||
+ (newname && (!((s = mailboxfile (tmp,newname)) && *s) ||
+ ((s = strrchr (tmp,'/')) && !s[1])))) {
+ sprintf (tmp,newname ?
+ "Can't rename mailbox %.80s to %.80s: invalid name" :
+ "Can't delete mailbox %.80s: invalid name",
+ old,newname);
+ MM_LOG (tmp,ERROR);
+ return NIL;
+ }
+ else if ((fd = open (file,O_RDWR,NIL)) < 0) {
+ sprintf (tmp,"Can't open mailbox %.80s: %s",old,strerror (errno));
+ MM_LOG (tmp,ERROR);
+ return NIL;
+ }
+ /* get exclusive parse/append permission */
+ if ((ld = lockfd (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 %.80s is in use by another process",old);
+ MM_LOG (tmp,ERROR);
+ unlockfd (ld,lock); /* release exclusive parse/append permission */
+ return NIL;
+ }
+
+ if (newname) { /* want rename? */
+ if (s = strrchr (tmp,'/')) {/* found superior to destination name? */
+ c = *++s; /* remember first character of inferior */
+ *s = '\0'; /* tie off to get just superior */
+ /* name doesn't exist, create it */
+ if ((stat (tmp,&sbuf) || ((sbuf.st_mode & S_IFMT) != S_IFDIR)) &&
+ !dummy_create_path (stream,tmp,get_dir_protection (newname)))
+ ret = NIL;
+ else *s = c; /* restore full name */
+ }
+ /* rename the file */
+ if (ret && rename (file,tmp)) {
+ sprintf (tmp,"Can't rename mailbox %.80s to %.80s: %s",old,newname,
+ strerror (errno));
+ MM_LOG (tmp,ERROR);
+ ret = NIL; /* set failure */
+ }
+ }
+ else if (unlink (file)) {
+ sprintf (tmp,"Can't delete mailbox %.80s: %s",old,strerror (errno));
+ MM_LOG (tmp,ERROR);
+ ret = NIL; /* set failure */
+ }
+ flock (fd,LOCK_UN); /* release lock on the file */
+ close (fd); /* close the file */
+ unlockfd (ld,lock); /* release exclusive parse/append permission */
+ /* recreate file if renamed INBOX */
+ if (ret && !compare_cstring (old,"INBOX")) dummy_create (NIL,"mail.txt");
+ return ret; /* return success */
+}
+
+/* Tenex Mail status
+ * Accepts: mail stream
+ * mailbox name
+ * status flags
+ * Returns: T on success, NIL on failure
+ */
+
+long tenex_status (MAILSTREAM *stream,char *mbx,long flags)
+{
+ MAILSTATUS status;
+ unsigned long i;
+ MAILSTREAM *tstream = NIL;
+ MAILSTREAM *systream = NIL;
+ /* make temporary stream (unless this mbx) */
+ if (!stream && !(stream = tstream =
+ mail_open (NIL,mbx,OP_READONLY|OP_SILENT))) return NIL;
+ status.flags = flags; /* return status values */
+ status.messages = stream->nmsgs;
+ status.recent = stream->recent;
+ if (flags & SA_UNSEEN) /* must search to get unseen messages */
+ for (i = 1,status.unseen = 0; i <= stream->nmsgs; i++)
+ if (!mail_elt (stream,i)->seen) status.unseen++;
+ status.uidnext = stream->uid_last + 1;
+ status.uidvalidity = stream->uid_validity;
+ /* calculate post-snarf results */
+ if (!status.recent && stream->inbox &&
+ (systream = mail_open (NIL,sysinbox (),OP_READONLY|OP_SILENT))) {
+ status.messages += systream->nmsgs;
+ status.recent += systream->recent;
+ if (flags & SA_UNSEEN) /* must search to get unseen messages */
+ for (i = 1; i <= systream->nmsgs; i++)
+ if (!mail_elt (systream,i)->seen) status.unseen++;
+ /* kludge but probably good enough */
+ status.uidnext += systream->nmsgs;
+ }
+ MM_STATUS(stream,mbx,&status);/* pass status to main program */
+ if (tstream) mail_close (tstream);
+ if (systream) mail_close (systream);
+ return T; /* success */
+}
+
+/* Tenex mail open
+ * Accepts: stream to open
+ * Returns: stream on success, NIL on failure
+ */
+
+MAILSTREAM *tenex_open (MAILSTREAM *stream)
+{
+ int fd,ld;
+ char tmp[MAILTMPLEN];
+ blocknotify_t bn = (blocknotify_t) mail_parameters (NIL,GET_BLOCKNOTIFY,NIL);
+ /* return prototype for OP_PROTOTYPE call */
+ if (!stream) return user_flags (&tenexproto);
+ if (stream->local) fatal ("tenex recycle stream");
+ user_flags (stream); /* set up user flags */
+ /* canonicalize the mailbox name */
+ if (!tenex_file (tmp,stream->mailbox)) {
+ sprintf (tmp,"Can't open - invalid name: %.80s",stream->mailbox);
+ MM_LOG (tmp,ERROR);
+ }
+ if (stream->rdonly ||
+ (fd = open (tmp,O_RDWR,NIL)) < 0) {
+ if ((fd = open (tmp,O_RDONLY,NIL)) < 0) {
+ sprintf (tmp,"Can't open mailbox: %s",strerror (errno));
+ MM_LOG (tmp,ERROR);
+ return NIL;
+ }
+ else if (!stream->rdonly) { /* got it, but readonly */
+ MM_LOG ("Can't get write access to mailbox, access is readonly",WARN);
+ stream->rdonly = T;
+ }
+ }
+ stream->local = fs_get (sizeof (TENEXLOCAL));
+ LOCAL->buf = (char *) fs_get (CHUNKSIZE);
+ LOCAL->buflen = CHUNKSIZE - 1;
+ LOCAL->text.data = (unsigned char *) fs_get (CHUNKSIZE);
+ LOCAL->text.size = CHUNKSIZE - 1;
+
+ /* note if an INBOX or not */
+ stream->inbox = !compare_cstring (stream->mailbox,"INBOX");
+ LOCAL->fd = fd; /* bind the file */
+ /* flush old name */
+ fs_give ((void **) &stream->mailbox);
+ /* save canonical name */
+ stream->mailbox = cpystr (tmp);
+ /* get shared parse permission */
+ if ((ld = lockfd (fd,tmp,LOCK_SH)) < 0) {
+ MM_LOG ("Unable to lock open mailbox",ERROR);
+ return NIL;
+ }
+ (*bn) (BLOCK_FILELOCK,NIL);
+ flock (LOCAL->fd,LOCK_SH); /* lock the file */
+ (*bn) (BLOCK_NONE,NIL);
+ unlockfd (ld,tmp); /* release shared parse permission */
+ LOCAL->filesize = 0; /* initialize parsed file size */
+ /* time not set up yet */
+ LOCAL->lastsnarf = LOCAL->filetime = 0;
+ LOCAL->mustcheck = LOCAL->shouldcheck = NIL;
+ 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);
+ if (!LOCAL) return NIL; /* failure if stream died */
+ stream->perm_seen = stream->perm_deleted =
+ stream->perm_flagged = stream->perm_answered = stream->perm_draft =
+ stream->rdonly ? NIL : T;
+ stream->perm_user_flags = stream->rdonly ? NIL : 0xffffffff;
+ return stream; /* return stream to caller */
+}
+
+/* Tenex mail close
+ * Accepts: MAIL stream
+ * close options
+ */
+
+void tenex_close (MAILSTREAM *stream,long options)
+{
+ if (stream && LOCAL) { /* only if a file is open */
+ int silent = stream->silent;
+ stream->silent = T; /* note this stream is dying */
+ if (options & CL_EXPUNGE) tenex_expunge (stream,NIL,NIL);
+ stream->silent = silent; /* restore previous status */
+ 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);
+ if (LOCAL->text.data) fs_give ((void **) &LOCAL->text.data);
+ /* nuke the local data */
+ fs_give ((void **) &stream->local);
+ stream->dtb = NIL; /* log out the DTB */
+ }
+}
+
+/* Tenex mail fetch fast data
+ * Accepts: MAIL stream
+ * sequence
+ * option flags
+ */
+
+void tenex_fast (MAILSTREAM *stream,char *sequence,long flags)
+{
+ STRING bs;
+ MESSAGECACHE *elt;
+ unsigned long i;
+ if (stream && LOCAL &&
+ ((flags & FT_UID) ? mail_uid_sequence (stream,sequence) :
+ mail_sequence (stream,sequence)))
+ for (i = 1; i <= stream->nmsgs; i++)
+ if ((elt = mail_elt (stream,i))->sequence) {
+ if (!elt->rfc822_size) { /* have header size yet? */
+ lseek (LOCAL->fd,elt->private.special.offset +
+ elt->private.special.text.size,L_SET);
+ /* resize bigbuf if necessary */
+ if (LOCAL->buflen < elt->private.msg.full.text.size) {
+ fs_give ((void **) &LOCAL->buf);
+ LOCAL->buflen = elt->private.msg.full.text.size;
+ LOCAL->buf = (char *) fs_get (LOCAL->buflen + 1);
+ }
+ /* tie off string */
+ LOCAL->buf[elt->private.msg.full.text.size] = '\0';
+ /* read in the message */
+ read (LOCAL->fd,LOCAL->buf,elt->private.msg.full.text.size);
+ INIT (&bs,mail_string,(void *) LOCAL->buf,
+ elt->private.msg.full.text.size);
+ /* calculate its CRLF size */
+ elt->rfc822_size = strcrlflen (&bs);
+ }
+ tenex_elt (stream,i); /* get current flags from file */
+ }
+}
+
+
+/* Tenex mail fetch flags
+ * Accepts: MAIL stream
+ * sequence
+ * option flags
+ * Sniffs at file to get flags
+ */
+
+void tenex_flags (MAILSTREAM *stream,char *sequence,long flags)
+{
+ unsigned long i;
+ if (stream && LOCAL &&
+ ((flags & FT_UID) ? mail_uid_sequence (stream,sequence) :
+ mail_sequence (stream,sequence)))
+ for (i = 1; i <= stream->nmsgs; i++)
+ if (mail_elt (stream,i)->sequence) tenex_elt (stream,i);
+}
+
+/* TENEX mail fetch message header
+ * Accepts: MAIL stream
+ * message # to fetch
+ * pointer to returned header text length
+ * option flags
+ * Returns: message header in RFC822 format
+ */
+
+char *tenex_header (MAILSTREAM *stream,unsigned long msgno,
+ unsigned long *length,long flags)
+{
+ char *s;
+ unsigned long i;
+ *length = 0; /* default to empty */
+ if (flags & FT_UID) return "";/* UID call "impossible" */
+ /* get to header position */
+ lseek (LOCAL->fd,tenex_hdrpos (stream,msgno,&i),L_SET);
+ if (flags & FT_INTERNAL) {
+ if (i > LOCAL->buflen) { /* resize if not enough space */
+ fs_give ((void **) &LOCAL->buf);
+ LOCAL->buf = (char *) fs_get (LOCAL->buflen = i + 1);
+ }
+ /* slurp the data */
+ read (LOCAL->fd,LOCAL->buf,*length = i);
+ }
+ else {
+ s = (char *) fs_get (i + 1);/* get readin buffer */
+ s[i] = '\0'; /* tie off string */
+ read (LOCAL->fd,s,i); /* slurp the data */
+ /* make CRLF copy of string */
+ *length = strcrlfcpy (&LOCAL->buf,&LOCAL->buflen,s,i);
+ fs_give ((void **) &s); /* free readin buffer */
+ }
+ return (char *) LOCAL->buf;
+}
+
+/* TENEX mail fetch message text (body only)
+ * Accepts: MAIL stream
+ * message # to fetch
+ * pointer to returned stringstruct
+ * option flags
+ * Returns: T, always
+ */
+
+long tenex_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags)
+{
+ char *s;
+ unsigned long i,j;
+ MESSAGECACHE *elt;
+ /* UID call "impossible" */
+ if (flags & FT_UID) return NIL;
+ /* get message status */
+ elt = tenex_elt (stream,msgno);
+ /* if message not seen */
+ if (!(flags & FT_PEEK) && !elt->seen) {
+ elt->seen = T; /* mark message as seen */
+ /* recalculate status */
+ tenex_update_status (stream,msgno,T);
+ MM_FLAGS (stream,msgno);
+ }
+ if (flags & FT_INTERNAL) { /* if internal representation wanted */
+ /* find header position */
+ i = tenex_hdrpos (stream,msgno,&j);
+ if (i > LOCAL->buflen) { /* resize if not enough space */
+ fs_give ((void **) &LOCAL->buf);
+ LOCAL->buf = (char *) fs_get (LOCAL->buflen = i + 1);
+ }
+ /* go to text position */
+ lseek (LOCAL->fd,i + j,L_SET);
+ /* slurp the data */
+ read (LOCAL->fd,LOCAL->buf,i);
+ /* set up stringstruct for internal */
+ INIT (bs,mail_string,LOCAL->buf,i);
+ }
+ else { /* normal form, previous text cached? */
+ if (elt->private.uid == LOCAL->uid)
+ i = elt->private.msg.text.text.size;
+ else { /* not cached, cache it now */
+ LOCAL->uid = elt->private.uid;
+ /* find header position */
+ i = tenex_hdrpos (stream,msgno,&j);
+ /* go to text position */
+ lseek (LOCAL->fd,i + j,L_SET);
+ s = (char *) fs_get ((i = tenex_size (stream,msgno) - j) + 1);
+ s[i] = '\0'; /* tie off string */
+ read (LOCAL->fd,s,i); /* slurp the data */
+ /* make CRLF copy of string */
+ i = elt->private.msg.text.text.size =
+ strcrlfcpy (&LOCAL->text.data,&LOCAL->text.size,s,i);
+ fs_give ((void **) &s); /* free readin buffer */
+ }
+ /* set up stringstruct */
+ INIT (bs,mail_string,LOCAL->text.data,i);
+ }
+ return T; /* success */
+}
+
+/* Tenex mail modify flags
+ * Accepts: MAIL stream
+ * sequence
+ * flag(s)
+ * option flags
+ */
+
+void tenex_flag (MAILSTREAM *stream,char *sequence,char *flag,long flags)
+{
+ time_t tp[2];
+ struct stat sbuf;
+ if (!stream->rdonly) { /* make sure the update takes */
+ fsync (LOCAL->fd);
+ fstat (LOCAL->fd,&sbuf); /* get current write time */
+ tp[1] = LOCAL->filetime = sbuf.st_mtime;
+ tp[0] = time (0); /* make sure read comes after all that */
+ utime (stream->mailbox,tp);
+ }
+}
+
+
+/* Tenex mail per-message modify flags
+ * Accepts: MAIL stream
+ * message cache element
+ */
+
+void tenex_flagmsg (MAILSTREAM *stream,MESSAGECACHE *elt)
+{
+ struct stat sbuf;
+ /* maybe need to do a checkpoint? */
+ if (LOCAL->filetime && !LOCAL->shouldcheck) {
+ fstat (LOCAL->fd,&sbuf); /* get current write time */
+ if (LOCAL->filetime < sbuf.st_mtime) LOCAL->shouldcheck = T;
+ LOCAL->filetime = 0; /* don't do this test for any other messages */
+ }
+ /* recalculate status */
+ tenex_update_status (stream,elt->msgno,NIL);
+}
+
+/* Tenex mail ping mailbox
+ * Accepts: MAIL stream
+ * Returns: T if stream still alive, NIL if not
+ */
+
+long tenex_ping (MAILSTREAM *stream)
+{
+ unsigned long i = 1;
+ long r = T;
+ int ld;
+ char lock[MAILTMPLEN];
+ struct stat sbuf;
+ if (stream && LOCAL) { /* only if stream already open */
+ fstat (LOCAL->fd,&sbuf); /* get current file poop */
+ if (LOCAL->filetime && !(LOCAL->mustcheck || LOCAL->shouldcheck) &&
+ (LOCAL->filetime < sbuf.st_mtime)) LOCAL->shouldcheck = T;
+ /* check for changed message status */
+ if (LOCAL->mustcheck || LOCAL->shouldcheck) {
+ LOCAL->filetime = sbuf.st_mtime;
+ if (LOCAL->shouldcheck) /* babble when we do this unilaterally */
+ MM_NOTIFY (stream,"[CHECK] Checking for flag updates",NIL);
+ while (i <= stream->nmsgs) tenex_elt (stream,i++);
+ LOCAL->mustcheck = LOCAL->shouldcheck = NIL;
+ }
+ /* get shared parse/append permission */
+ if ((sbuf.st_size != LOCAL->filesize) &&
+ ((ld = lockfd (LOCAL->fd,lock,LOCK_SH)) >= 0)) {
+ /* parse resulting mailbox */
+ r = (tenex_parse (stream)) ? T : NIL;
+ unlockfd (ld,lock); /* release shared parse/append permission */
+ }
+ if (LOCAL) { /* stream must still be alive */
+ /* snarf if this is a read-write inbox */
+ if (stream->inbox && !stream->rdonly) {
+ tenex_snarf (stream);
+ fstat (LOCAL->fd,&sbuf);/* see if file changed now */
+ if ((sbuf.st_size != LOCAL->filesize) &&
+ ((ld = lockfd (LOCAL->fd,lock,LOCK_SH)) >= 0)) {
+ /* parse resulting mailbox */
+ r = (tenex_parse (stream)) ? T : NIL;
+ unlockfd (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)
+{
+ /* mark that a check is desired */
+ if (LOCAL) LOCAL->mustcheck = T;
+ if (tenex_ping (stream)) MM_LOG ("Check completed",(long) NIL);
+}
+
+/* Tenex mail snarf messages from system inbox
+ * Accepts: MAIL stream
+ */
+
+void tenex_snarf (MAILSTREAM *stream)
+{
+ unsigned long i = 0;
+ unsigned long j,r,hdrlen,txtlen;
+ struct stat sbuf;
+ char *hdr,*txt,lock[MAILTMPLEN],tmp[MAILTMPLEN];
+ MESSAGECACHE *elt;
+ MAILSTREAM *sysibx = NIL;
+ int ld;
+ /* give up if can't get exclusive permission */
+ if ((time (0) >= (LOCAL->lastsnarf +
+ (long) mail_parameters (NIL,GET_SNARFINTERVAL,NIL))) &&
+ strcmp (sysinbox (),stream->mailbox) &&
+ ((ld = lockfd (LOCAL->fd,lock,LOCK_EX)) >= 0)) {
+ MM_CRITICAL (stream); /* go critical */
+ /* sizes match and anything in sysinbox? */
+ if (!stat (sysinbox (),&sbuf) && sbuf.st_size &&
+ !fstat (LOCAL->fd,&sbuf) && (sbuf.st_size == LOCAL->filesize) &&
+ (sysibx = mail_open (sysibx,sysinbox (),OP_SILENT)) &&
+ (!sysibx->rdonly) && (r = sysibx->nmsgs)) {
+ /* yes, go to end of file in our mailbox */
+ lseek (LOCAL->fd,sbuf.st_size,L_SET);
+ /* for each message in sysibx mailbox */
+ while (r && (++i <= sysibx->nmsgs)) {
+ /* snarf message from system INBOX */
+ hdr = cpystr (mail_fetchheader_full(sysibx,i,NIL,&hdrlen,FT_INTERNAL));
+ txt = mail_fetchtext_full (sysibx,i,&txtlen,FT_INTERNAL|FT_PEEK);
+ /* if have a message */
+ if (j = hdrlen + txtlen) {
+ /* calculate header line */
+ mail_date (LOCAL->buf,elt = mail_elt (sysibx,i));
+ sprintf (LOCAL->buf + strlen (LOCAL->buf),
+ ",%lu;0000000000%02o\n",j,(unsigned)
+ ((fSEEN * elt->seen) + (fDELETED * elt->deleted) +
+ (fFLAGGED * elt->flagged) + (fANSWERED * elt->answered) +
+ (fDRAFT * elt->draft)));
+ /* copy message */
+ if ((write (LOCAL->fd,LOCAL->buf,strlen (LOCAL->buf)) < 0) ||
+ (write (LOCAL->fd,hdr,hdrlen) < 0) ||
+ (write (LOCAL->fd,txt,txtlen) < 0)) r = 0;
+ }
+ fs_give ((void **) &hdr);
+ }
+
+ /* make sure all the updates take */
+ if (fsync (LOCAL->fd)) r = 0;
+ if (r) { /* delete all the messages we copied */
+ if (r == 1) strcpy (tmp,"1");
+ else sprintf (tmp,"1:%lu",r);
+ mail_flag (sysibx,tmp,"\\Deleted",ST_SET);
+ mail_expunge (sysibx); /* now expunge all those messages */
+ }
+ else {
+ sprintf (LOCAL->buf,"Can't copy new mail: %s",strerror (errno));
+ MM_LOG (LOCAL->buf,WARN);
+ ftruncate (LOCAL->fd,sbuf.st_size);
+ }
+ fstat (LOCAL->fd,&sbuf); /* yes, get current file size */
+ LOCAL->filetime = sbuf.st_mtime;
+ }
+ if (sysibx) mail_close (sysibx);
+ MM_NOCRITICAL (stream); /* release critical */
+ unlockfd (ld,lock); /* release exclusive parse/append permission */
+ LOCAL->lastsnarf = time (0);/* note time of last snarf */
+ }
+}
+
+/* Tenex mail expunge mailbox
+ * Accepts: MAIL stream
+ * sequence to expunge if non-NIL
+ * expunge options
+ * Returns: T, always
+ */
+
+long tenex_expunge (MAILSTREAM *stream,char *sequence,long options)
+{
+ long ret;
+ time_t tp[2];
+ struct stat sbuf;
+ off_t pos = 0;
+ 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;
+ blocknotify_t bn = (blocknotify_t) mail_parameters (NIL,GET_BLOCKNOTIFY,NIL);
+ if (!(ret = (sequence ? ((options & EX_UID) ?
+ mail_uid_sequence (stream,sequence) :
+ mail_sequence (stream,sequence)) : LONGT) &&
+ tenex_ping (stream))); /* parse sequence if given, ping stream */
+ else if (stream->rdonly) MM_LOG ("Expunge ignored on readonly mailbox",WARN);
+ else {
+ if (LOCAL->filetime && !LOCAL->shouldcheck) {
+ fstat (LOCAL->fd,&sbuf); /* get current write time */
+ if (LOCAL->filetime < sbuf.st_mtime) LOCAL->shouldcheck = T;
+ }
+ /* 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 = lockfd (LOCAL->fd,lock,LOCK_EX)) < 0)
+ MM_LOG ("Unable to lock expunge mailbox",ERROR);
+ /* make sure see any newly-arrived messages */
+ else if (!tenex_parse (stream));
+ /* get exclusive access */
+ else if (flock (LOCAL->fd,LOCK_EX|LOCK_NB)) {
+ (*bn) (BLOCK_FILELOCK,NIL);
+ flock (LOCAL->fd,LOCK_SH);/* recover previous lock */
+ (*bn) (BLOCK_NONE,NIL);
+ MM_LOG ("Can't expunge because mailbox is in use by another process",
+ ERROR);
+ unlockfd (ld,lock); /* release exclusive parse/append permission */
+ }
+
+ else {
+ MM_CRITICAL (stream); /* go critical */
+ recent = stream->recent; /* get recent now that pinged and locked */
+ /* for each message */
+ while (i <= stream->nmsgs) {
+ /* get cache element */
+ elt = tenex_elt (stream,i);
+ /* number of bytes to smash or preserve */
+ k = elt->private.special.text.size + tenex_size (stream,i);
+ /* if need to expunge this message */
+ if (elt->deleted && (sequence ? elt->sequence : T)) {
+ /* if recent, note one less recent message */
+ if (elt->recent) --recent;
+ delta += k; /* number of bytes to delete */
+ /* notify upper levels */
+ mail_expunged (stream,i);
+ n++; /* count up one more expunged message */
+ }
+ else if (i++ && delta) {/* preserved message */
+ /* first byte to preserve */
+ j = elt->private.special.offset;
+ do { /* read from source position */
+ m = min (k,LOCAL->buflen);
+ lseek (LOCAL->fd,j,L_SET);
+ read (LOCAL->fd,LOCAL->buf,m);
+ pos = j - delta; /* write to destination position */
+ lseek (LOCAL->fd,pos,L_SET);
+ while (T) {
+ lseek (LOCAL->fd,pos,L_SET);
+ if (write (LOCAL->fd,LOCAL->buf,m) > 0) break;
+ MM_NOTIFY (stream,strerror (errno),WARN);
+ MM_DISKERROR (stream,errno,T);
+ }
+ pos += m; /* new position */
+ j += m; /* next chunk, perhaps */
+ } while (k -= m); /* until done */
+ /* note the new address of this text */
+ elt->private.special.offset -= delta;
+ }
+ /* preserved but no deleted messages */
+ else pos = elt->private.special.offset + k;
+ }
+
+ if (n) { /* truncate file after last message */
+ if (pos != (LOCAL->filesize -= delta)) {
+ sprintf (LOCAL->buf,
+ "Calculated size mismatch %lu != %lu, delta = %lu",
+ (unsigned long) pos,(unsigned long) LOCAL->filesize,delta);
+ MM_LOG (LOCAL->buf,WARN);
+ LOCAL->filesize = pos;/* fix it then */
+ }
+ ftruncate (LOCAL->fd,LOCAL->filesize);
+ sprintf (LOCAL->buf,"Expunged %lu messages",n);
+ /* output the news */
+ MM_LOG (LOCAL->buf,(long) NIL);
+ }
+ else MM_LOG ("No messages deleted, so no update needed",(long) NIL);
+ fsync (LOCAL->fd); /* force disk update */
+ fstat (LOCAL->fd,&sbuf); /* get new write time */
+ tp[1] = LOCAL->filetime = sbuf.st_mtime;
+ tp[0] = time (0); /* reset atime to now */
+ utime (stream->mailbox,tp);
+ MM_NOCRITICAL (stream); /* release critical */
+ /* notify upper level of new mailbox size */
+ mail_exists (stream,stream->nmsgs);
+ mail_recent (stream,recent);
+ (*bn) (BLOCK_FILELOCK,NIL);
+ flock (LOCAL->fd,LOCK_SH);/* allow sharers again */
+ (*bn) (BLOCK_NONE,NIL);
+ unlockfd (ld,lock); /* release exclusive parse/append permission */
+ }
+ }
+ return LONGT;
+}
+
+/* Tenex mail copy message(s)
+ * Accepts: MAIL stream
+ * sequence
+ * destination mailbox
+ * copy options
+ * Returns: T if success, NIL if failed
+ */
+
+long tenex_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options)
+{
+ struct stat sbuf;
+ time_t tp[2];
+ MESSAGECACHE *elt;
+ unsigned long i,j,k;
+ long ret = LONGT;
+ int fd,ld;
+ char file[MAILTMPLEN],lock[MAILTMPLEN];
+ mailproxycopy_t pc =
+ (mailproxycopy_t) mail_parameters (stream,GET_MAILPROXYCOPY,NIL);
+ /* make sure valid mailbox */
+ if (!tenex_isvalid (mailbox,LOCAL->buf)) switch (errno) {
+ case ENOENT: /* no such file? */
+ MM_NOTIFY (stream,"[TRYCREATE] Must create mailbox before copy",NIL);
+ return NIL;
+ case 0: /* merely empty file? */
+ break;
+ case EACCES: /* file protected */
+ sprintf (LOCAL->buf,"Can't access destination: %.80s",mailbox);
+ MM_LOG (LOCAL->buf,ERROR);
+ return NIL;
+ case EINVAL:
+ if (pc) return (*pc) (stream,sequence,mailbox,options);
+ sprintf (LOCAL->buf,"Invalid Tenex-format mailbox name: %.80s",mailbox);
+ MM_LOG (LOCAL->buf,ERROR);
+ return NIL;
+ default:
+ if (pc) return (*pc) (stream,sequence,mailbox,options);
+ sprintf (LOCAL->buf,"Not a Tenex-format mailbox: %.80s",mailbox);
+ MM_LOG (LOCAL->buf,ERROR);
+ return NIL;
+ }
+ if (!((options & CP_UID) ? mail_uid_sequence (stream,sequence) :
+ mail_sequence (stream,sequence))) return NIL;
+ /* got file? */
+ if ((fd = open (tenex_file(file,mailbox),O_RDWR,NIL)) < 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 (flock (fd,LOCK_SH) || ((ld = lockfd (fd,lock,LOCK_EX)) < 0)) {
+ MM_LOG ("Unable to lock copy mailbox",ERROR);
+ MM_NOCRITICAL (stream);
+ 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; ret && (i <= stream->nmsgs); i++)
+ if ((elt = mail_elt (stream,i))->sequence) {
+ lseek (LOCAL->fd,elt->private.special.offset,L_SET);
+ /* number of bytes to copy */
+ k = elt->private.special.text.size + tenex_size (stream,i);
+ do { /* read from source position */
+ j = min (k,LOCAL->buflen);
+ read (LOCAL->fd,LOCAL->buf,j);
+ if (write (fd,LOCAL->buf,j) < 0) ret = NIL;
+ } while (ret && (k -= j));/* until done */
+ }
+ /* make sure all the updates take */
+ if (!(ret && (ret = !fsync (fd)))) {
+ sprintf (LOCAL->buf,"Unable to write message: %s",strerror (errno));
+ MM_LOG (LOCAL->buf,ERROR);
+ ftruncate (fd,sbuf.st_size);
+ }
+ if (ret) tp[0] = time (0) - 1;/* set atime to now-1 if successful copy */
+ /* else preserve \Marked status */
+ else tp[0] = (sbuf.st_ctime > sbuf.st_atime) ? sbuf.st_atime : time(0);
+ tp[1] = sbuf.st_mtime; /* preserve mtime */
+ utime (file,tp); /* set the times */
+ close (fd); /* close the file */
+ unlockfd (ld,lock); /* release exclusive parse/append permission */
+ MM_NOCRITICAL (stream); /* release critical */
+ /* delete all requested messages */
+ if (ret && (options & CP_MOVE)) {
+ 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);
+ }
+ if (!stream->rdonly) { /* make sure the update takes */
+ fsync (LOCAL->fd);
+ fstat (LOCAL->fd,&sbuf); /* get current write time */
+ tp[1] = LOCAL->filetime = sbuf.st_mtime;
+ tp[0] = time (0); /* make sure atime remains greater */
+ utime (stream->mailbox,tp);
+ }
+ }
+ if (ret && mail_parameters (NIL,GET_COPYUID,NIL))
+ MM_LOG ("Can not return meaningful COPYUID with this mailbox format",WARN);
+ return ret;
+}
+
+/* Tenex mail append message from stringstruct
+ * Accepts: MAIL stream
+ * destination mailbox
+ * append callback
+ * data for callback
+ * Returns: T if append successful, else NIL
+ */
+
+long tenex_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data)
+{
+ struct stat sbuf;
+ int fd,ld,c;
+ char *flags,*date,tmp[MAILTMPLEN],file[MAILTMPLEN],lock[MAILTMPLEN];
+ time_t tp[2];
+ FILE *df;
+ MESSAGECACHE elt;
+ long f;
+ unsigned long i,j,uf,size;
+ STRING *message;
+ long ret = LONGT;
+ /* default stream to prototype */
+ if (!stream) stream = user_flags (&tenexproto);
+ /* make sure valid mailbox */
+ if (!tenex_isvalid (mailbox,tmp)) switch (errno) {
+ case ENOENT: /* no such file? */
+ if (!compare_cstring (mailbox,"INBOX")) dummy_create (NIL,"mail.txt");
+ else {
+ MM_NOTIFY (stream,"[TRYCREATE] Must create mailbox before append",NIL);
+ return NIL;
+ }
+ /* falls through */
+ case 0: /* merely empty file? */
+ break;
+ case EACCES: /* file protected */
+ sprintf (tmp,"Can't access destination: %.80s",mailbox);
+ MM_LOG (tmp,ERROR);
+ return NIL;
+ case EINVAL:
+ sprintf (tmp,"Invalid TENEX-format mailbox name: %.80s",mailbox);
+ MM_LOG (tmp,ERROR);
+ return NIL;
+ default:
+ sprintf (tmp,"Not a TENEX-format mailbox: %.80s",mailbox);
+ MM_LOG (tmp,ERROR);
+ return NIL;
+ }
+ /* get first message */
+ if (!MM_APPEND (af) (stream,data,&flags,&date,&message)) return NIL;
+
+ /* open destination mailbox */
+ if (((fd = open (tenex_file (file,mailbox),O_WRONLY|O_APPEND,NIL)) < 0) ||
+ !(df = fdopen (fd,"ab"))) {
+ sprintf (tmp,"Can't open append mailbox: %s",strerror (errno));
+ MM_LOG (tmp,ERROR);
+ return NIL;
+ }
+ /* get parse/append permission */
+ if (flock (fd,LOCK_SH) || ((ld = lockfd (fd,lock,LOCK_EX)) < 0)) {
+ MM_LOG ("Unable to lock append mailbox",ERROR);
+ close (fd);
+ return NIL;
+ }
+ MM_CRITICAL (stream); /* go critical */
+ fstat (fd,&sbuf); /* get current file size */
+ errno = 0;
+ do { /* parse flags */
+ if (!SIZE (message)) { /* guard against zero-length */
+ MM_LOG ("Append of zero-length message",ERROR);
+ ret = NIL;
+ break;
+ }
+ f = mail_parse_flags (stream,flags,&i);
+ /* reverse bits (dontcha wish we had CIRC?) */
+ for (uf = 0; i; uf |= 1 << (29 - find_rightmost_bit (&i)));
+ if (date) { /* parse date if given */
+ if (!mail_parse_date (&elt,date)) {
+ sprintf (tmp,"Bad date in append: %.80s",date);
+ MM_LOG (tmp,ERROR);
+ ret = NIL; /* mark failure */
+ break;
+ }
+ mail_date (tmp,&elt); /* write preseved date */
+ }
+ else internal_date (tmp); /* get current date in IMAP format */
+ i = GETPOS (message); /* remember current position */
+ for (j = SIZE (message), size = 0; j; --j)
+ if (SNX (message) != '\015') ++size;
+ SETPOS (message,i); /* restore position */
+ /* write header */
+ if (fprintf (df,"%s,%lu;%010lo%02lo\n",tmp,size,uf,(unsigned long) f) < 0)
+ ret = NIL;
+ else { /* write message */
+ while (size) if ((c = 0xff & SNX (message)) != '\015') {
+ if (putc (c,df) != EOF) --size;
+ else break;
+ }
+ /* get next message */
+ if (size || !MM_APPEND (af) (stream,data,&flags,&date,&message))
+ ret = NIL;
+ }
+ } while (ret && message);
+ /* if error... */
+ if (!ret || (fflush (df) == EOF)) {
+ ftruncate (fd,sbuf.st_size);/* revert file */
+ close (fd); /* make sure fclose() doesn't corrupt us */
+ if (errno) {
+ sprintf (tmp,"Message append failed: %s",strerror (errno));
+ MM_LOG (tmp,ERROR);
+ }
+ ret = NIL;
+ }
+ if (ret) tp[0] = time (0) - 1;/* set atime to now-1 if successful copy */
+ /* else preserve \Marked status */
+ else tp[0] = (sbuf.st_ctime > sbuf.st_atime) ? sbuf.st_atime : time(0);
+ tp[1] = sbuf.st_mtime; /* preserve mtime */
+ utime (file,tp); /* set the times */
+ fclose (df); /* close the file */
+ unlockfd (ld,lock); /* release exclusive parse/append permission */
+ MM_NOCRITICAL (stream); /* release critical */
+ if (ret && mail_parameters (NIL,GET_APPENDUID,NIL))
+ MM_LOG ("Can not return meaningful APPENDUID with this mailbox format",
+ WARN);
+ return ret;
+}
+
+/* Internal routines */
+
+
+/* Tenex mail return internal message size in bytes
+ * Accepts: MAIL stream
+ * message #
+ * Returns: internal size of message
+ */
+
+unsigned long tenex_size (MAILSTREAM *stream,unsigned long m)
+{
+ MESSAGECACHE *elt = mail_elt (stream,m);
+ return ((m < stream->nmsgs) ? mail_elt (stream,m+1)->private.special.offset :
+ LOCAL->filesize) -
+ (elt->private.special.offset + elt->private.special.text.size);
+}
+
+
+/* Tenex mail generate file string
+ * Accepts: temporary buffer to write into
+ * mailbox name string
+ * Returns: local file string or NIL if failure
+ */
+
+char *tenex_file (char *dst,char *name)
+{
+ char tmp[MAILTMPLEN];
+ char *s = mailboxfile (dst,name);
+ /* return our standard inbox */
+ return (s && !*s) ? mailboxfile (dst,tenex_isvalid ("~/INBOX",tmp) ?
+ "~/INBOX" : "mail.txt") : s;
+}
+
+/* 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;
+ unsigned char c,*s,*t,*x;
+ char tmp[MAILTMPLEN];
+ unsigned long i,j;
+ long curpos = LOCAL->filesize;
+ long nmsgs = stream->nmsgs;
+ long recent = stream->recent;
+ short added = NIL;
+ short silent = stream->silent;
+ fstat (LOCAL->fd,&sbuf); /* get status */
+ if (sbuf.st_size < curpos) { /* sanity check */
+ sprintf (tmp,"Mailbox shrank from %lu to %lu!",
+ (unsigned long) curpos,(unsigned long) sbuf.st_size);
+ MM_LOG (tmp,ERROR);
+ tenex_close (stream,NIL);
+ return NIL;
+ }
+ stream->silent = T; /* don't pass up exists events yet */
+ while (sbuf.st_size - curpos){/* while there is stuff to parse */
+ /* get to that position in the file */
+ lseek (LOCAL->fd,curpos,L_SET);
+ if ((i = read (LOCAL->fd,LOCAL->buf,64)) <= 0) {
+ sprintf (tmp,"Unable to read internal header at %lu, size = %lu: %s",
+ (unsigned long) curpos,(unsigned long) sbuf.st_size,
+ i ? strerror (errno) : "no data read");
+ MM_LOG (tmp,ERROR);
+ tenex_close (stream,NIL);
+ return NIL;
+ }
+ LOCAL->buf[i] = '\0'; /* tie off buffer just in case */
+ if (!(s = strchr (LOCAL->buf,'\012'))) {
+ sprintf (tmp,"Unable to find newline at %lu in %lu bytes, text: %s",
+ (unsigned long) curpos,i,(char *) LOCAL->buf);
+ MM_LOG (tmp,ERROR);
+ tenex_close (stream,NIL);
+ return NIL;
+ }
+ *s = '\0'; /* tie off header line */
+ i = (s + 1) - LOCAL->buf; /* note start of text offset */
+ if (!((s = strchr (LOCAL->buf,',')) && (t = strchr (s+1,';')))) {
+ sprintf (tmp,"Unable to parse internal header at %lu: %s",
+ (unsigned long) curpos,(char *) LOCAL->buf);
+ MM_LOG (tmp,ERROR);
+ tenex_close (stream,NIL);
+ return NIL;
+ }
+ *s++ = '\0'; *t++ = '\0'; /* tie off fields */
+
+ added = T; /* note that a new message was added */
+ /* swell the cache */
+ mail_exists (stream,++nmsgs);
+ /* instantiate an elt for this message */
+ (elt = mail_elt (stream,nmsgs))->valid = T;
+ elt->private.uid = ++stream->uid_last;
+ /* note file offset of header */
+ elt->private.special.offset = curpos;
+ /* in case error */
+ elt->private.special.text.size = 0;
+ /* header size not known yet */
+ elt->private.msg.header.text.size = 0;
+ x = s; /* parse the header components */
+ if (mail_parse_date (elt,LOCAL->buf) &&
+ (elt->private.msg.full.text.size = strtoul (s,(char **) &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])
+ elt->private.special.text.size = i;
+ else { /* oops */
+ sprintf (tmp,"Unable to parse internal header elements at %ld: %s,%s;%s",
+ curpos,(char *) LOCAL->buf,(char *) x,(char *) t);
+ MM_LOG (tmp,ERROR);
+ tenex_close (stream,NIL);
+ return NIL;
+ }
+ /* make sure didn't run off end of file */
+ if ((curpos += (elt->private.msg.full.text.size + i)) > sbuf.st_size) {
+ sprintf (tmp,"Last message (at %lu) runs past end of file (%lu > %lu)",
+ elt->private.special.offset,(unsigned long) curpos,
+ (unsigned long) sbuf.st_size);
+ MM_LOG (tmp,ERROR);
+ tenex_close (stream,NIL);
+ return NIL;
+ }
+ c = t[10]; /* remember first system flags byte */
+ t[10] = '\0'; /* tie off flags */
+ j = strtoul (t,NIL,8); /* get user flags value */
+ t[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;
+ /* 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 & fDRAFT) elt->draft = 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);
+ }
+ }
+ fsync (LOCAL->fd); /* make sure all the fOLD flags take */
+ /* update parsed file size and time */
+ LOCAL->filesize = sbuf.st_size;
+ fstat (LOCAL->fd,&sbuf); /* get status again to ensure time is right */
+ LOCAL->filetime = sbuf.st_mtime;
+ if (added && !stream->rdonly){/* make sure atime updated */
+ time_t tp[2];
+ tp[0] = time (0);
+ tp[1] = LOCAL->filetime;
+ utime (stream->mailbox,tp);
+ }
+ stream->silent = silent; /* can pass up events now */
+ 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 get cache element with status updating from file
+ * Accepts: MAIL stream
+ * message number
+ * Returns: cache element
+ */
+
+MESSAGECACHE *tenex_elt (MAILSTREAM *stream,unsigned long msgno)
+{
+ MESSAGECACHE *elt = mail_elt (stream,msgno);
+ struct { /* old flags */
+ unsigned int seen : 1;
+ unsigned int deleted : 1;
+ unsigned int flagged : 1;
+ unsigned int answered : 1;
+ unsigned int draft : 1;
+ unsigned long user_flags;
+ } old;
+ old.seen = elt->seen; old.deleted = elt->deleted; old.flagged = elt->flagged;
+ old.answered = elt->answered; old.draft = elt->draft;
+ old.user_flags = elt->user_flags;
+ tenex_read_flags (stream,elt);
+ if ((old.seen != elt->seen) || (old.deleted != elt->deleted) ||
+ (old.flagged != elt->flagged) || (old.answered != elt->answered) ||
+ (old.draft != elt->draft) || (old.user_flags != elt->user_flags))
+ MM_FLAGS (stream,msgno); /* let top level know */
+ return elt;
+}
+
+/* Tenex read flags from file
+ * Accepts: MAIL stream
+ * Returns: cache element
+ */
+
+void tenex_read_flags (MAILSTREAM *stream,MESSAGECACHE *elt)
+{
+ unsigned long i,j;
+ /* noop if readonly and have valid flags */
+ if (stream->rdonly && elt->valid) return;
+ /* set the seek pointer */
+ lseek (LOCAL->fd,(off_t) elt->private.special.offset +
+ elt->private.special.text.size - 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 */
+ i = (((LOCAL->buf[10]-'0') * 8) + LOCAL->buf[11]-'0');
+ elt->seen = i & fSEEN ? T : NIL; elt->deleted = i & fDELETED ? T : NIL;
+ elt->flagged = i & fFLAGGED ? T : NIL;
+ elt->answered = i & fANSWERED ? T : NIL; elt->draft = i & fDRAFT ? T : NIL;
+ LOCAL->buf[10] = '\0'; /* tie off flags */
+ j = strtoul(LOCAL->buf,NIL,8);/* get user flags value */
+ /* 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;
+ elt->valid = T; /* have valid flags now */
+}
+
+/* Tenex update status string
+ * Accepts: MAIL stream
+ * message number
+ * flag saying whether or not to sync
+ */
+
+void tenex_update_status (MAILSTREAM *stream,unsigned long msgno,long syncflag)
+{
+ time_t tp[2];
+ struct stat sbuf;
+ MESSAGECACHE *elt = mail_elt (stream,msgno);
+ unsigned long j,k = 0;
+ /* readonly */
+ if (stream->rdonly || !elt->valid) tenex_read_flags (stream,elt);
+ else { /* readwrite */
+ 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,(unsigned)
+ (fOLD + (fSEEN * elt->seen) + (fDELETED * elt->deleted) +
+ (fFLAGGED * elt->flagged) + (fANSWERED * elt->answered) +
+ (fDRAFT * elt->draft)));
+ /* get to that place in the file */
+ lseek (LOCAL->fd,(off_t) elt->private.special.offset +
+ elt->private.special.text.size - 13,L_SET);
+ /* write new flags */
+ write (LOCAL->fd,LOCAL->buf,12);
+ if (syncflag) { /* sync if requested */
+ fsync (LOCAL->fd);
+ fstat (LOCAL->fd,&sbuf); /* get new write time */
+ tp[1] = LOCAL->filetime = sbuf.st_mtime;
+ tp[0] = time (0); /* make sure read is later */
+ utime (stream->mailbox,tp);
+ }
+ }
+}
+
+/* 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_hdrpos (MAILSTREAM *stream,unsigned long msgno,
+ unsigned long *size)
+{
+ unsigned long siz;
+ long i = 0;
+ char c = '\0';
+ char *s = NIL;
+ MESSAGECACHE *elt = tenex_elt (stream,msgno);
+ unsigned long ret = elt->private.special.offset +
+ elt->private.special.text.size;
+ unsigned long msiz = tenex_size (stream,msgno);
+ /* is header size known? */
+ if (!(*size = elt->private.msg.header.text.size)) {
+ lseek (LOCAL->fd,ret,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->private.msg.header.text.size = (*size = siz + 1);
+
+ return ret; /* return to caller */
+ }
+ else c = *s++; /* next character */
+ }
+ /* header consumes entire message */
+ elt->private.msg.header.text.size = *size = msiz;
+ }
+ return ret;
+}
generated by cgit v1.2.3-54-g00ecf (git 2.44.0) at 2024-06-25 06:45:30 +0000