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-rw-r--r--imap/src/osdep/nt/mbxnt.c1694
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diff --git a/imap/src/osdep/nt/mbxnt.c b/imap/src/osdep/nt/mbxnt.c
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+++ b/imap/src/osdep/nt/mbxnt.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: MBX 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: 3 October 1995
+ * Last Edited: 28 September 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.
+ */
+
+#include <stdio.h>
+#include <ctype.h>
+#include <errno.h>
+extern int errno; /* just in case */
+#include "mail.h"
+#include "osdep.h"
+#include <fcntl.h>
+#include <time.h>
+#include <sys/stat.h>
+#include <sys/utime.h>
+#include "misc.h"
+#include "dummy.h"
+#include "fdstring.h"
+
+
+/* Build parameters */
+
+#define HDRSIZE 2048
+
+/* MBX I/O stream local data */
+
+typedef struct mbx_local {
+ unsigned int flagcheck: 1; /* if ping should sweep for flags */
+ unsigned int expok: 1; /* if expunging OK in ping */
+ unsigned int expunged : 1; /* if one or more expunged messages */
+ int fd; /* file descriptor for I/O */
+ int ld; /* lock file descriptor */
+ int ffuserflag; /* first free user flag */
+ off_t filesize; /* file size parsed */
+ time_t filetime; /* last file time */
+ time_t lastsnarf; /* last snarf time */
+ unsigned char *buf; /* temporary buffer */
+ unsigned long buflen; /* current size of temporary buffer */
+ char lock[MAILTMPLEN]; /* buffer to write lock name */
+} MBXLOCAL;
+
+
+/* Convenient access to local data */
+
+#define LOCAL ((MBXLOCAL *) stream->local)
+
+/* Function prototypes */
+
+DRIVER *mbx_valid (char *name);
+int mbx_isvalid (MAILSTREAM **stream,char *name,char *file,int *ld,char *lock,
+ long flags);
+void *mbx_parameters (long function,void *value);
+void mbx_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents);
+void mbx_list (MAILSTREAM *stream,char *ref,char *pat);
+void mbx_lsub (MAILSTREAM *stream,char *ref,char *pat);
+long mbx_create (MAILSTREAM *stream,char *mailbox);
+long mbx_delete (MAILSTREAM *stream,char *mailbox);
+long mbx_rename (MAILSTREAM *stream,char *old,char *newname);
+long mbx_status (MAILSTREAM *stream,char *mbx,long flags);
+MAILSTREAM *mbx_open (MAILSTREAM *stream);
+void mbx_close (MAILSTREAM *stream,long options);
+void mbx_abort (MAILSTREAM *stream);
+void mbx_flags (MAILSTREAM *stream,char *sequence,long flags);
+char *mbx_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *length,
+ long flags);
+long mbx_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags);
+void mbx_flag (MAILSTREAM *stream,char *sequence,char *flag,long flags);
+void mbx_flagmsg (MAILSTREAM *stream,MESSAGECACHE *elt);
+long mbx_ping (MAILSTREAM *stream);
+void mbx_check (MAILSTREAM *stream);
+long mbx_expunge (MAILSTREAM *stream,char *sequence,long options);
+void mbx_snarf (MAILSTREAM *stream);
+long mbx_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options);
+long mbx_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data);
+
+long mbx_parse (MAILSTREAM *stream);
+MESSAGECACHE *mbx_elt (MAILSTREAM *stream,unsigned long msgno,long expok);
+unsigned long mbx_read_flags (MAILSTREAM *stream,MESSAGECACHE *elt);
+void mbx_update_header (MAILSTREAM *stream);
+void mbx_update_status (MAILSTREAM *stream,unsigned long msgno,long flags);
+unsigned long mbx_hdrpos (MAILSTREAM *stream,unsigned long msgno,
+ unsigned long *size,char **hdr);
+unsigned long mbx_rewrite (MAILSTREAM *stream,unsigned long *reclaimed,
+ long flags);
+long mbx_flaglock (MAILSTREAM *stream);
+
+/* MBX mail routines */
+
+
+/* Driver dispatch used by MAIL */
+
+DRIVER mbxdriver = {
+ "mbx", /* driver name */
+ DR_LOCAL|DR_MAIL|DR_CRLF|DR_LOCKING,
+ /* driver flags */
+ (DRIVER *) NIL, /* next driver */
+ mbx_valid, /* mailbox is valid for us */
+ mbx_parameters, /* manipulate parameters */
+ mbx_scan, /* scan mailboxes */
+ mbx_list, /* list mailboxes */
+ mbx_lsub, /* list subscribed mailboxes */
+ NIL, /* subscribe to mailbox */
+ NIL, /* unsubscribe from mailbox */
+ mbx_create, /* create mailbox */
+ mbx_delete, /* delete mailbox */
+ mbx_rename, /* rename mailbox */
+ mail_status_default, /* status of mailbox */
+ mbx_open, /* open mailbox */
+ mbx_close, /* close mailbox */
+ mbx_flags, /* fetch message "fast" attributes */
+ mbx_flags, /* fetch message flags */
+ NIL, /* fetch overview */
+ NIL, /* fetch message envelopes */
+ mbx_header, /* fetch message header */
+ mbx_text, /* fetch message body */
+ NIL, /* fetch partial message text */
+ NIL, /* unique identifier */
+ NIL, /* message number */
+ mbx_flag, /* modify flags */
+ mbx_flagmsg, /* per-message modify flags */
+ NIL, /* search for message based on criteria */
+ NIL, /* sort messages */
+ NIL, /* thread messages */
+ mbx_ping, /* ping mailbox to see if still alive */
+ mbx_check, /* check for new messages */
+ mbx_expunge, /* expunge deleted messages */
+ mbx_copy, /* copy messages to another mailbox */
+ mbx_append, /* append string message to mailbox */
+ NIL /* garbage collect stream */
+};
+
+ /* prototype stream */
+MAILSTREAM mbxproto = {&mbxdriver};
+
+/* MBX mail validate mailbox
+ * Accepts: mailbox name
+ * Returns: our driver if name is valid, NIL otherwise
+ */
+
+DRIVER *mbx_valid (char *name)
+{
+ char tmp[MAILTMPLEN];
+ int fd = mbx_isvalid (NIL,name,tmp,NIL,NIL,NIL);
+ if (fd < 0) return NIL;
+ close (fd); /* don't need the fd now */
+ return &mbxdriver;
+}
+
+
+/* MBX mail test for valid mailbox
+ * Accepts: returned stream with valid mailbox keywords
+ * mailbox name
+ * buffer to write file name
+ * returned lock fd
+ * returned lock name
+ * RW flags or NIL for readonly
+ * Returns: file descriptor if valid, NIL otherwise
+ */
+
+#define MBXISVALIDNOUID 0x1 /* RW, don't do UID action */
+#define MBXISVALIDUID 0x2 /* RW, do UID action */
+
+int mbx_isvalid (MAILSTREAM **stream,char *name,char *file,int *ld,char *lock,
+ long flags)
+{
+ int fd,upd;
+ int ret = -1;
+ unsigned long i;
+ long j,k;
+ off_t pos;
+ char c,*s,*t,hdr[HDRSIZE];
+ struct stat sbuf;
+ struct utimbuf times;
+ int error = EINVAL; /* assume invalid argument */
+ if (ld) *ld = -1; /* initially no lock */
+ /* if file, get its status */
+ if ((s = dummy_file (file,name)) && !stat (s,&sbuf) &&
+ ((sbuf.st_mode & S_IFMT) == S_IFREG) &&
+ ((fd = open (file,(flags ? O_RDWR : O_RDONLY)|O_BINARY,NIL)) >= 0)) {
+ error = -1; /* assume bogus format */
+ if (((((j = read (fd,hdr,HDRSIZE)) == HDRSIZE) && (hdr[0] == '*')) ||
+ /* locked, set byte 0 to "*", read rest */
+ ((j < 0) && (lseek (fd,1,L_SET) == 1) &&
+ (read (fd,hdr+1,HDRSIZE-1) == (HDRSIZE-1)) && (hdr[0] = '*'))) &&
+ (hdr[1] == 'm') && (hdr[2] == 'b') && (hdr[3] == 'x') &&
+ (hdr[4] == '*') && (hdr[5] == '\015') && (hdr[6] == '\012') &&
+ isxdigit (hdr[7]) && isxdigit (hdr[8]) && isxdigit (hdr[9]) &&
+ isxdigit (hdr[10]) && isxdigit (hdr[11]) && isxdigit (hdr[12]) &&
+ isxdigit (hdr[13]) && isxdigit (hdr[14]) && isxdigit (c = hdr[15]) &&
+ isxdigit (hdr[16]) && isxdigit (hdr[17]) && isxdigit (hdr[18]) &&
+ isxdigit (hdr[19]) && isxdigit (hdr[20]) && isxdigit (hdr[21]) &&
+ isxdigit (hdr[22]) && (hdr[23] == '\015') && (hdr[24] == '\012')) {
+ ret = fd; /* mbx format */
+
+ if (stream) { /* lock if making a mini-stream */
+ if (flock (fd,LOCK_SH) ||
+ (flags && ((*ld = lockname (lock,file,LOCK_EX)) < 0))) ret = -1;
+ /* reread data now that locked */
+ else if (lseek (fd,0,L_SET) ||
+ (read (fd,hdr+1,HDRSIZE-1) != (HDRSIZE-1))) ret = -1;
+ else {
+ *stream = (MAILSTREAM *) memset (fs_get (sizeof (MAILSTREAM)),0,
+ sizeof (MAILSTREAM));
+ hdr[15] = '\0'; /* tie off UIDVALIDITY */
+ (*stream)->uid_validity = strtoul (hdr+7,NIL,16);
+ hdr[15] = c; /* now get UIDLAST */
+ (*stream)->uid_last = strtoul (hdr+15,NIL,16);
+ /* parse user flags */
+ for (i = 0, s = hdr + 25;
+ (i < NUSERFLAGS) && (t = strchr (s,'\015')) && (t - s);
+ i++, s = t + 2) {
+ *t = '\0'; /* tie off flag */
+ if (strlen (s) <= MAXUSERFLAG)
+ (*stream)->user_flags[i] = cpystr (s);
+ }
+ /* make sure have true UIDLAST */
+ if (flags & MBXISVALIDUID) {
+ for (upd = NIL,pos = 2048, k = 0; pos < sbuf.st_size;
+ pos += (j + k)) {
+ /* read header for this message */
+ lseek (fd,pos,L_SET);
+ if ((j = read (fd,hdr,64)) >= 0) {
+ hdr[j] = '\0';
+ if ((s = strchr (hdr,'\015')) && (s[1] == '\012')) {
+ *s = '\0';
+ k = s + 2 - hdr;
+ if ((s = strchr (hdr,',')) && (j = strtol (s+1,&s,10)) &&
+ (*s == ';') && (s = strchr (s+1,'-'))) {
+ /* get UID if there is any */
+ i = strtoul (++s,&t,16);
+ if (!*t && (t == (s + 8)) && (i <= (*stream)->uid_last)) {
+ if (!i) {
+ lseek (fd,pos + s - hdr,L_SET);
+ sprintf (hdr,"%08lx",++(*stream)->uid_last);
+ write (fd,hdr,8);
+ upd = T;
+ }
+ continue;
+ }
+ }
+ }
+ ret = -1; /* error, give up */
+ *stream = mail_close (*stream);
+ pos = sbuf.st_size + 1;
+ j = k = 0;
+ }
+ }
+
+ if (upd) { /* need to update hdr with new UIDLAST? */
+ lseek (fd,15,L_SET);
+ sprintf (hdr,"%08lx",(*stream)->uid_last);
+ write (fd,hdr,8);
+ }
+ }
+ }
+ }
+ }
+ if (ret != fd) close (fd); /* close the file */
+ else lseek (fd,0,L_SET); /* else rewind to start */
+ /* \Marked status? */
+ if (sbuf.st_ctime > sbuf.st_atime) {
+ /* preserve atime and mtime */
+ times.actime = sbuf.st_atime;
+ times.modtime = sbuf.st_mtime;
+ utime (file,&times); /* set the times */
+ }
+ }
+ /* in case INBOX but not mbx format */
+ else if (((error = errno) == ENOENT) && !compare_cstring (name,"INBOX"))
+ error = -1;
+ if ((ret < 0) && ld && (*ld >= 0)) {
+ unlockfd (*ld,lock);
+ *ld = -1;
+ }
+ errno = error; /* return as last error */
+ return ret; /* return what we should */
+}
+
+/* MBX manipulate driver parameters
+ * Accepts: function code
+ * function-dependent value
+ * Returns: function-dependent return value
+ */
+
+void *mbx_parameters (long function,void *value)
+{
+ void *ret = NIL;
+ switch ((int) function) {
+ case SET_ONETIMEEXPUNGEATPING:
+ if (value) ((MBXLOCAL *) ((MAILSTREAM *) value)->local)->expok = T;
+ case GET_ONETIMEEXPUNGEATPING:
+ if (value) ret = (void *)
+ (((MBXLOCAL *) ((MAILSTREAM *) value)->local)->expok ? VOIDT : NIL);
+ break;
+ }
+ return ret;
+}
+
+
+/* MBX mail scan mailboxes
+ * Accepts: mail stream
+ * reference
+ * pattern to search
+ * string to scan
+ */
+
+void mbx_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents)
+{
+ if (stream) dummy_scan (NIL,ref,pat,contents);
+}
+
+
+/* MBX mail list mailboxes
+ * Accepts: mail stream
+ * reference
+ * pattern to search
+ */
+
+void mbx_list (MAILSTREAM *stream,char *ref,char *pat)
+{
+ if (stream) dummy_list (NIL,ref,pat);
+}
+
+
+/* MBX mail list subscribed mailboxes
+ * Accepts: mail stream
+ * reference
+ * pattern to search
+ */
+
+void mbx_lsub (MAILSTREAM *stream,char *ref,char *pat)
+{
+ if (stream) dummy_lsub (NIL,ref,pat);
+}
+
+/* MBX mail create mailbox
+ * Accepts: MAIL stream
+ * mailbox name to create
+ * Returns: T on success, NIL on failure
+ */
+
+long mbx_create (MAILSTREAM *stream,char *mailbox)
+{
+ char *s,mbx[MAILTMPLEN],tmp[HDRSIZE];
+ long ret = NIL;
+ int i,fd;
+ if (!(s = dummy_file (mbx,mailbox))) {
+ sprintf (mbx,"Can't create %.80s: invalid name",mailbox);
+ mm_log (mbx,ERROR);
+ }
+ /* create underlying file */
+ else if (dummy_create (stream,s)) {
+ /* done if made directory */
+ if ((s = strrchr (s,'\\')) && !s[1]) return T;
+ if ((fd = open (mbx,O_WRONLY|O_BINARY,NIL)) < 0) {
+ sprintf (tmp,"Can't reopen mailbox node %.80s: %s",mbx,strerror (errno));
+ mm_log (tmp,ERROR);
+ unlink (mbx); /* delete the file */
+ }
+ else {
+ memset (tmp,'\0',HDRSIZE);/* initialize header */
+ sprintf (s = tmp,"*mbx*\015\012%08lx00000000\015\012",
+ (unsigned long) time (0));
+ for (i = 0; i < NUSERFLAGS; ++i)
+ sprintf (s += strlen (s),"%s\015\012",
+ (stream && stream->user_flags[i]) ? stream->user_flags[i] :
+ "");
+ if (write (fd,tmp,HDRSIZE) != HDRSIZE) {
+ sprintf (tmp,"Can't initialize mailbox node %.80s: %s",
+ mbx,strerror (errno));
+ mm_log (tmp,ERROR);
+ unlink (mbx); /* delete the file */
+ }
+ else ret = T; /* success */
+ close (fd); /* close file */
+ }
+ }
+ return ret;
+}
+
+
+/* MBX mail delete mailbox
+ * Accepts: MAIL stream
+ * mailbox name to delete
+ * Returns: T on success, NIL on failure
+ */
+
+long mbx_delete (MAILSTREAM *stream,char *mailbox)
+{
+ return mbx_rename (stream,mailbox,NIL);
+}
+
+/* MBX mail rename mailbox
+ * Accepts: MAIL stream
+ * old mailbox name
+ * new mailbox name (or NIL for delete)
+ * Returns: T on success, NIL on failure
+ */
+
+long mbx_rename (MAILSTREAM *stream,char *old,char *newname)
+{
+ long ret = LONGT;
+ char c,*s,tmp[MAILTMPLEN],file[MAILTMPLEN],lock[MAILTMPLEN];
+ int fd,ld;
+ struct stat sbuf;
+ if (!dummy_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|O_BINARY,NIL)) < 0) {
+ sprintf (tmp,"Can't open mailbox %.80s: %s",old,strerror (errno));
+ mm_log (tmp,ERROR);
+ return NIL;
+ }
+ /* get parse/append permission */
+ if ((ld = lockname (lock,file,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? */
+ /* found superior to destination name? */
+ if ((s = strrchr (tmp,'\\')) && (s != tmp) &&
+ ((tmp[1] != ':') || (s != tmp + 2))) {
+ c = s[1]; /* remember character after delimiter */
+ *s = s[1] = '\0'; /* tie off name at delimiter */
+ /* name doesn't exist, create it */
+ if (stat (tmp,&sbuf) || ((sbuf.st_mode & S_IFMT) != S_IFDIR)) {
+ *s = '\\'; /* restore delimiter */
+ if (!dummy_create (stream,tmp)) ret = NIL;
+ }
+ else *s = '\\'; /* restore delimiter */
+ s[1] = c; /* restore character after delimiter */
+ }
+ flock (fd,LOCK_UN); /* release lock on the file */
+ close (fd); /* pacify NTFS */
+ /* 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 {
+ flock (fd,LOCK_UN); /* release lock on the file */
+ close (fd); /* pacify NTFS */
+ if (unlink (file)) {
+ sprintf (tmp,"Can't delete mailbox %.80s: %s",old,strerror (errno));
+ mm_log (tmp,ERROR);
+ ret = NIL; /* set failure */
+ }
+ }
+ unlockfd (ld,lock); /* release exclusive parse/append permission */
+ /* recreate file if renamed INBOX */
+ if (ret && !compare_cstring (old,"INBOX")) mbx_create (NIL,"INBOX");
+ return ret; /* return success */
+}
+
+/* MBX mail open
+ * Accepts: stream to open
+ * Returns: stream on success, NIL on failure
+ */
+
+MAILSTREAM *mbx_open (MAILSTREAM *stream)
+{
+ int fd,ld;
+ short silent;
+ char tmp[MAILTMPLEN];
+ if (!stream) return &mbxproto;/* return prototype for OP_PROTOTYPE call */
+ if (stream->local) fatal ("mbx recycle stream");
+ /* canonicalize the mailbox name */
+ if (!dummy_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|O_BINARY,NIL)) < 0) {
+ if ((fd = open (tmp,O_RDONLY|O_BINARY,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 = memset (fs_get (sizeof (MBXLOCAL)),NIL,sizeof (MBXLOCAL));
+ LOCAL->fd = fd; /* bind the file */
+ LOCAL->ld = -1; /* no flaglock */
+ LOCAL->buf = (char *) fs_get (CHUNKSIZE);
+ LOCAL->buflen = CHUNKSIZE - 1;
+ /* note if an INBOX or not */
+ stream->inbox = !compare_cstring (stream->mailbox,"INBOX");
+ fs_give ((void **) &stream->mailbox);
+ stream->mailbox = cpystr (tmp);
+ /* get parse/append permission */
+ if ((ld = lockname (tmp,stream->mailbox,LOCK_EX)) < 0) {
+ mm_log ("Unable to lock open mailbox",ERROR);
+ return NIL;
+ }
+ flock (LOCAL->fd,LOCK_SH); /* lock the file */
+ unlockfd (ld,tmp); /* release shared parse permission */
+ LOCAL->filesize = HDRSIZE; /* initialize parsed file size */
+ LOCAL->filetime = 0; /* time not set up yet */
+ LOCAL->expok = LOCAL->flagcheck = NIL;
+ stream->sequence++; /* bump sequence number */
+ /* parse mailbox */
+ stream->nmsgs = stream->recent = 0;
+ silent = stream->silent; /* defer events */
+ stream->silent = T;
+ if (mbx_ping (stream) && !stream->nmsgs)
+ mm_log ("Mailbox is empty",(long) NIL);
+ stream->silent = silent; /* now notify upper level */
+ mail_exists (stream,stream->nmsgs);
+ mail_recent (stream,stream->recent);
+ 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;
+ stream->kwd_create = (stream->user_flags[NUSERFLAGS-1] || stream->rdonly) ?
+ NIL : T; /* can we create new user flags? */
+ return stream; /* return stream to caller */
+}
+
+/* MBX mail close
+ * Accepts: MAIL stream
+ * close options
+ */
+
+void mbx_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 */
+ /* do an expunge if requested */
+ if (options & CL_EXPUNGE) mbx_expunge (stream,NIL,NIL);
+ else { /* otherwise do a checkpoint to purge */
+ LOCAL->expok = T; /* possible expunged messages */
+ mbx_ping (stream);
+ }
+ stream->silent = silent; /* restore previous status */
+ mbx_abort (stream);
+ }
+}
+
+
+/* MBX mail abort stream
+ * Accepts: MAIL stream
+ */
+
+void mbx_abort (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 */
+ }
+}
+
+
+/* MBX mail fetch flags
+ * Accepts: MAIL stream
+ * sequence
+ * option flags
+ * Sniffs at file to see if some other process changed the flags
+ */
+
+void mbx_flags (MAILSTREAM *stream,char *sequence,long flags)
+{
+ MESSAGECACHE *elt;
+ unsigned long i;
+ if (mbx_ping (stream) && /* ping mailbox, get new status for messages */
+ ((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 && !elt->valid)
+ mbx_elt (stream,i,NIL);
+}
+
+/* MBX 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 *mbx_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *length,
+ long flags)
+{
+ unsigned long i;
+ char *s;
+ *length = 0; /* default to empty */
+ if (flags & FT_UID) return "";/* UID call "impossible" */
+ /* get header position, possibly header */
+ i = mbx_hdrpos (stream,msgno,length,&s);
+ if (!s) { /* mbx_hdrpos() returned header? */
+ lseek (LOCAL->fd,i,L_SET); /* no, get to header position */
+ /* is buffer big enough? */
+ if (*length > LOCAL->buflen) {
+ fs_give ((void **) &LOCAL->buf);
+ LOCAL->buf = (char *) fs_get ((LOCAL->buflen = *length) + 1);
+ }
+ /* slurp the data */
+ read (LOCAL->fd,s = LOCAL->buf,*length);
+ }
+ s[*length] = '\0'; /* tie off string */
+ return s;
+}
+
+/* MBX mail fetch message text (body only)
+ * Accepts: MAIL stream
+ * message # to fetch
+ * pointer to returned header text length
+ * option flags
+ * Returns: T on success, NIL on failure
+ */
+
+long mbx_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags)
+{
+ FDDATA d;
+ unsigned long i,j;
+ MESSAGECACHE *elt;
+ /* UID call "impossible" */
+ if (flags & FT_UID) return NIL;
+ /* get message status */
+ elt = mbx_elt (stream,msgno,NIL);
+ /* if message not seen */
+ if (!(flags & FT_PEEK) && !elt->seen && mbx_flaglock (stream)) {
+ elt->seen = T; /* mark message as seen */
+ /* recalculate status */
+ mbx_update_status (stream,msgno,NIL);
+ mm_flags (stream,msgno);
+ /* update flags */
+ mbx_flag (stream,NIL,NIL,NIL);
+ }
+ if (!LOCAL) return NIL; /* mbx_flaglock() could have aborted */
+ /* find header position */
+ i = mbx_hdrpos (stream,msgno,&j,NIL);
+ d.fd = LOCAL->fd; /* set up file descriptor */
+ d.pos = i + j;
+ d.chunk = LOCAL->buf; /* initial buffer chunk */
+ d.chunksize = CHUNKSIZE;
+ INIT (bs,fd_string,&d,elt->rfc822_size - j);
+ return LONGT; /* success */
+}
+
+/* MBX mail modify flags
+ * Accepts: MAIL stream
+ * sequence
+ * flag(s)
+ * option flags
+ * Unlocks flag lock
+ */
+
+void mbx_flag (MAILSTREAM *stream,char *sequence,char *flag,long flags)
+{
+ struct utimbuf times;
+ struct stat sbuf;
+ /* make sure the update takes */
+ if (!stream->rdonly && LOCAL && (LOCAL->fd >= 0) && (LOCAL->ld >= 0)) {
+ fsync (LOCAL->fd);
+ fstat (LOCAL->fd,&sbuf); /* get current write time */
+ times.modtime = LOCAL->filetime = sbuf.st_mtime;
+ /* update header */
+ if ((LOCAL->ffuserflag < NUSERFLAGS) &&
+ stream->user_flags[LOCAL->ffuserflag]) mbx_update_header (stream);
+ times.actime = time (0); /* make sure read comes after all that */
+ utime (stream->mailbox,&times);
+ }
+ if (LOCAL->ld >= 0) { /* unlock now */
+ unlockfd (LOCAL->ld,LOCAL->lock);
+ LOCAL->ld = -1;
+ }
+}
+
+
+/* MBX mail per-message modify flags
+ * Accepts: MAIL stream
+ * message cache element
+ */
+
+void mbx_flagmsg (MAILSTREAM *stream,MESSAGECACHE *elt)
+{
+ if (mbx_flaglock (stream)) mbx_update_status (stream,elt->msgno,NIL);
+}
+
+/* MBX mail ping mailbox
+ * Accepts: MAIL stream
+ * Returns: T if stream still alive, NIL if not
+ */
+
+long mbx_ping (MAILSTREAM *stream)
+{
+ unsigned long i,pos;
+ long ret = NIL;
+ int ld;
+ char lock[MAILTMPLEN];
+ MESSAGECACHE *elt;
+ struct stat sbuf;
+ if (stream && LOCAL) { /* only if stream already open */
+ ret = LONGT; /* assume OK */
+ fstat (LOCAL->fd,&sbuf); /* get current file poop */
+ /* allow expunge if permitted at ping */
+ if (mail_parameters (NIL,GET_EXPUNGEATPING,NIL)) LOCAL->expok = T;
+ /* if external modification */
+ if (LOCAL->filetime && (LOCAL->filetime < sbuf.st_mtime))
+ LOCAL->flagcheck = T; /* upgrade to flag checking */
+ /* new mail or flagcheck handling needed? */
+ if (((sbuf.st_size - LOCAL->filesize) || LOCAL->flagcheck ||
+ !stream->nmsgs) &&
+ ((ld = lockname (lock,stream->mailbox,LOCK_EX)) >= 0)) {
+ if (!LOCAL->flagcheck) ret = mbx_parse (stream);
+ /* sweep mailbox for changed message status */
+ else if (ret = mbx_parse (stream)) {
+ unsigned long recent = 0;
+ LOCAL->filetime = sbuf.st_mtime;
+ for (i = 1; i <= stream->nmsgs; )
+ if (elt = mbx_elt (stream,i,LOCAL->expok)) {
+ if (elt->recent) ++recent;
+ ++i;
+ }
+ mail_recent (stream,recent);
+ LOCAL->flagcheck = NIL; /* got all the updates */
+ }
+ unlockfd (ld,lock); /* release shared parse/append permission */
+ }
+ if (ret) { /* must still be alive */
+ if (!LOCAL->expunged) /* look for holes if none known yet */
+ for (i = 1, pos = HDRSIZE;
+ !LOCAL->expunged && (i <= stream->nmsgs);
+ i++, pos += elt->private.special.text.size + elt->rfc822_size)
+ if ((elt = mail_elt (stream,i))->private.special.offset != pos)
+ LOCAL->expunged = T;/* found a hole */
+ /* burp any holes */
+ if (LOCAL->expunged && !stream->rdonly) {
+ if (mbx_rewrite (stream,&i,NIL)) fatal ("expunge on check");
+ if (i) { /* any space reclaimed? */
+ LOCAL->expunged = NIL;/* no more pending expunge */
+ sprintf (LOCAL->buf,"Reclaimed %lu bytes of expunged space",i);
+ mm_log (LOCAL->buf,(long) NIL);
+ }
+ }
+ LOCAL->expok = NIL; /* no more expok */
+ }
+ }
+ return ret; /* return result of the parse */
+}
+
+/* MBX mail check mailbox (reparses status too)
+ * Accepts: MAIL stream
+ */
+
+void mbx_check (MAILSTREAM *stream)
+{
+ if (LOCAL) LOCAL->expok = T; /* mark that a check is desired */
+ if (mbx_ping (stream)) mm_log ("Check completed",(long) NIL);
+}
+
+
+/* MBX mail expunge mailbox
+ * Accepts: MAIL stream
+ * sequence to expunge if non-NIL
+ * expunge options
+ * Returns: T if success, NIL if failure
+ */
+
+long mbx_expunge (MAILSTREAM *stream,char *sequence,long options)
+{
+ long ret;
+ unsigned long nexp,reclaimed;
+ if (ret = sequence ? ((options & EX_UID) ?
+ mail_uid_sequence (stream,sequence) :
+ mail_sequence (stream,sequence)) : LONGT) {
+ if (!mbx_ping (stream)); /* do nothing if stream dead */
+ else if (stream->rdonly) /* won't do on readonly files! */
+ mm_log ("Expunge ignored on readonly mailbox",WARN);
+ /* if expunged any messages */
+ else if (nexp = mbx_rewrite (stream,&reclaimed,sequence ? -1 : 1)) {
+ sprintf (LOCAL->buf,"Expunged %lu messages",nexp);
+ mm_log (LOCAL->buf,(long) NIL);
+ }
+ else if (reclaimed) { /* or if any prior expunged space reclaimed */
+ sprintf (LOCAL->buf,"Reclaimed %lu bytes of expunged space",reclaimed);
+ mm_log (LOCAL->buf,(long) NIL);
+ }
+ else mm_log ("No messages deleted, so no update needed",(long) NIL);
+ }
+ return ret;
+}
+
+/* MBX mail copy message(s)
+ * Accepts: MAIL stream
+ * sequence
+ * destination mailbox
+ * copy options
+ * Returns: T if success, NIL if failed
+ */
+
+long mbx_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options)
+{
+ struct stat sbuf;
+ struct utimbuf times;
+ MESSAGECACHE *elt;
+ unsigned long i,j,k,m;
+ long ret = LONGT;
+ int fd,ld;
+ char *s,*t,file[MAILTMPLEN],lock[MAILTMPLEN];
+ mailproxycopy_t pc =
+ (mailproxycopy_t) mail_parameters (stream,GET_MAILPROXYCOPY,NIL);
+ copyuid_t cu = (copyuid_t) mail_parameters (NIL,GET_COPYUID,NIL);
+ SEARCHSET *source = cu ? mail_newsearchset () : NIL;
+ SEARCHSET *dest = cu ? mail_newsearchset () : NIL;
+ MAILSTREAM *dstream = NIL;
+ if (!((options & CP_UID) ? mail_uid_sequence (stream,sequence) :
+ mail_sequence (stream,sequence))) return NIL;
+ /* make sure valid mailbox */
+ if ((fd = mbx_isvalid (&dstream,mailbox,file,&ld,lock,
+ cu ? MBXISVALIDUID : MBXISVALIDNOUID)) < 0)
+ switch (errno) {
+ case ENOENT: /* no such file? */
+ mm_notify (stream,"[TRYCREATE] Must create mailbox before copy",NIL);
+ return NIL;
+ 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 MBX-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 MBX-format mailbox: %.80s",mailbox);
+ mm_log (LOCAL->buf,ERROR);
+ return NIL;
+ }
+ /* got file? */
+ if ((fd = open (dummy_file (file,mailbox),O_RDWR|O_CREAT|O_BINARY,
+ 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 */
+ 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 +
+ elt->private.special.text.size,L_SET);
+ mail_date(LOCAL->buf,elt);/* build target header */
+ /* get target keyword mask */
+ for (j = elt->user_flags, k = 0; j; )
+ if (s = stream->user_flags[find_rightmost_bit (&j)])
+ for (m = 0; (m < NUSERFLAGS) && (t = dstream->user_flags[m]); m++)
+ if (!compare_cstring (s,t) && (k |= 1 << m)) break;
+ sprintf (LOCAL->buf+strlen(LOCAL->buf),",%lu;%08lx%04x-%08lx\015\012",
+ elt->rfc822_size,k,(unsigned)
+ ((fSEEN * elt->seen) + (fDELETED * elt->deleted) +
+ (fFLAGGED * elt->flagged) + (fANSWERED * elt->answered) +
+ (fDRAFT * elt->draft)),cu ? ++dstream->uid_last : 0);
+ /* write target header */
+ if (ret = (write (fd,LOCAL->buf,strlen (LOCAL->buf)) > 0)) {
+ for (k = elt->rfc822_size; ret && (j = min (k,LOCAL->buflen)); k -= j){
+ read (LOCAL->fd,LOCAL->buf,j);
+ ret = write (fd,LOCAL->buf,j) >= 0;
+ }
+ if (cu) { /* need to pass back new UID? */
+ mail_append_set (source,mail_uid (stream,i));
+ mail_append_set (dest,dstream->uid_last);
+ }
+ }
+ }
+
+ /* 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 (cu && ret) { /* return sets if doing COPYUID */
+ (*cu) (stream,mailbox,dstream->uid_validity,source,dest);
+ lseek (fd,15,L_SET); /* update UIDLAST */
+ sprintf (LOCAL->buf,"%08lx",dstream->uid_last);
+ write (fd,LOCAL->buf,8);
+ }
+ else { /* flush any sets we may have built */
+ mail_free_searchset (&source);
+ mail_free_searchset (&dest);
+ }
+ /* set atime to now-1 if successful copy */
+ if (ret) times.actime = time (0) - 1;
+ /* else preserved \Marked status */
+ else times.actime = (sbuf.st_ctime > sbuf.st_atime) ?
+ sbuf.st_atime : time (0);
+ times.modtime = sbuf.st_mtime;/* preserve mtime */
+ utime (file,&times); /* set the times */
+ close (fd); /* close the file */
+ mm_nocritical (stream); /* release critical */
+ unlockfd (ld,lock); /* release exclusive parse/append permission */
+ /* delete all requested messages */
+ if (ret && (options & CP_MOVE) && mbx_flaglock (stream)) {
+ for (i = 1; i <= stream->nmsgs; i++) if (mail_elt (stream,i)->sequence) {
+ /* mark message deleted */
+ mbx_elt (stream,i,NIL)->deleted = T;
+ /* recalculate status */
+ mbx_update_status (stream,i,NIL);
+ }
+ /* update flags */
+ mbx_flag (stream,NIL,NIL,NIL);
+ }
+ if (dstream != stream) mail_close (dstream);
+ return ret;
+}
+
+/* MBX mail append message from stringstruct
+ * Accepts: MAIL stream
+ * destination mailbox
+ * append callback
+ * data for callback
+ * Returns: T if append successful, else NIL
+ */
+
+long mbx_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data)
+{
+ struct stat sbuf;
+ int fd,ld;
+ char *flags,*date,tmp[MAILTMPLEN],file[MAILTMPLEN],lock[MAILTMPLEN];
+ struct utimbuf times;
+ FILE *df;
+ MESSAGECACHE elt;
+ long f;
+ unsigned long i,uf;
+ STRING *message;
+ long ret = NIL;
+ MAILSTREAM *dstream = NIL;
+ appenduid_t au = (appenduid_t) mail_parameters (NIL,GET_APPENDUID,NIL);
+ SEARCHSET *dst = au ? mail_newsearchset () : NIL;
+ /* make sure valid mailbox */
+ /* make sure valid mailbox */
+ if ((fd = mbx_isvalid (&dstream,mailbox,file,&ld,lock,
+ au ? MBXISVALIDUID : MBXISVALIDNOUID)) < 0)
+ switch (errno) {
+ case ENOENT: /* no such file? */
+ if (compare_cstring (mailbox,"INBOX")) {
+ mm_notify (stream,"[TRYCREATE] Must create mailbox before append",NIL);
+ return NIL;
+ }
+ /* can create INBOX here */
+ mbx_create (dstream = stream ? stream : &mbxproto,"INBOX");
+ if ((fd = mbx_isvalid (&dstream,mailbox,file,&ld,lock,
+ au ? MBXISVALIDUID : MBXISVALIDNOUID)) < 0)
+ break;
+ case EACCES: /* file protected */
+ sprintf (tmp,"Can't access destination: %.80s",mailbox);
+ MM_LOG (tmp,ERROR);
+ return NIL;
+ case EINVAL:
+ sprintf (tmp,"Invalid MBX-format mailbox name: %.80s",mailbox);
+ mm_log (tmp,ERROR);
+ return NIL;
+ default:
+ sprintf (tmp,"Not a MBX-format mailbox: %.80s",mailbox);
+ mm_log (tmp,ERROR);
+ return NIL;
+ }
+
+ /* get first message */
+ if (!(*af) (dstream,data,&flags,&date,&message)) close (fd);
+ else if (!(df = fdopen (fd,"r+b"))) {
+ MM_LOG ("Unable to reopen append mailbox",ERROR);
+ close (fd);
+ }
+ else {
+ mm_critical (dstream); /* go critical */
+ fstat (fd,&sbuf); /* get current file size */
+ fseek (df,sbuf.st_size,SEEK_SET);
+ errno = 0;
+ for (ret = LONGT; ret && message; ) {
+ if (!SIZE (message)) { /* guard against zero-length */
+ mm_log ("Append of zero-length message",ERROR);
+ ret = NIL;
+ break;
+ }
+ f = mail_parse_flags (dstream,flags,&uf);
+ 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 */
+ /* write header */
+ if (fprintf (df,"%s,%lu;%08lx%04lx-%08lx\015\012",tmp,i = SIZE (message),
+ uf,(unsigned long) f,au ? ++dstream->uid_last : 0) < 0)
+ ret = NIL;
+ else { /* write message */
+ size_t j;
+ if (!message->cursize) SETPOS (message,GETPOS (message));
+ while (i && (j = fwrite (message->curpos,1,message->cursize,df))) {
+ i -= j;
+ SETPOS (message,GETPOS (message) + j);
+ }
+ /* get next message */
+ if (i || !(*af) (dstream,data,&flags,&date,&message)) ret = NIL;
+ else if (au) mail_append_set (dst,dstream->uid_last);
+ }
+ }
+
+ /* if error... */
+ if (!ret || (fflush (df) == EOF)) {
+ /* revert file */
+ ftruncate (fd,sbuf.st_size);
+ 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 (au && ret) { /* return sets if doing APPENDUID */
+ (*au) (mailbox,dstream->uid_validity,dst);
+ fseek (df,15,SEEK_SET); /* update UIDLAST */
+ fprintf (df,"%08lx",dstream->uid_last);
+ }
+ else mail_free_searchset (&dst);
+ if (ret) times.actime = time (0) - 1;
+ /* else preserve \Marked status */
+ else times.actime = (sbuf.st_ctime > sbuf.st_atime) ?
+ sbuf.st_atime : time (0);
+ /* preserve mtime */
+ times.modtime = sbuf.st_mtime;
+ utime (file,&times); /* set the times */
+ fclose (df); /* close the file */
+ mm_nocritical (dstream); /* release critical */
+ }
+ unlockfd (ld,lock); /* release exclusive parse/append permission */
+ if (dstream != stream) mail_close (dstream);
+ return ret;
+}
+
+/* Internal routines */
+
+
+/* MBX mail parse mailbox
+ * Accepts: MAIL stream
+ * Returns: T if parse OK
+ * NIL if failure, stream aborted
+ */
+
+long mbx_parse (MAILSTREAM *stream)
+{
+ struct stat sbuf;
+ MESSAGECACHE *elt = NIL;
+ unsigned char c,*s,*t,*x;
+ char tmp[MAILTMPLEN];
+ unsigned long i,j,k,m;
+ off_t curpos = LOCAL->filesize;
+ unsigned long nmsgs = stream->nmsgs;
+ unsigned long recent = stream->recent;
+ unsigned long lastuid = 0;
+ short dirty = NIL;
+ short added = NIL;
+ short silent = stream->silent;
+ short uidwarn = T;
+ 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);
+ mbx_abort (stream);
+ return NIL;
+ }
+ lseek (LOCAL->fd,0,L_SET); /* rewind file */
+ /* read internal header */
+ read (LOCAL->fd,LOCAL->buf,HDRSIZE);
+ LOCAL->buf[HDRSIZE] = '\0'; /* tie off header */
+ c = LOCAL->buf[15]; /* save first character of last UID */
+ LOCAL->buf[15] = '\0';
+ /* parse UID validity */
+ stream->uid_validity = strtoul (LOCAL->buf + 7,NIL,16);
+ LOCAL->buf[15] = c; /* restore first character of last UID */
+ /* parse last UID */
+ i = strtoul (LOCAL->buf + 15,NIL,16);
+ stream->uid_last = stream->rdonly ? max (i,stream->uid_last) : i;
+ /* parse user flags */
+ for (i = 0, s = LOCAL->buf + 25;
+ (i < NUSERFLAGS) && (t = strchr (s,'\015')) && (t - s);
+ i++, s = t + 2) {
+ *t = '\0'; /* tie off flag */
+ if (!stream->user_flags[i] && (strlen (s) <= MAXUSERFLAG))
+ stream->user_flags[i] = cpystr (s);
+ }
+ LOCAL->ffuserflag = (int) i; /* first free user flag */
+
+ stream->silent = T; /* don't pass up mm_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);
+ mbx_abort (stream);
+ return NIL;
+ }
+ LOCAL->buf[i] = '\0'; /* tie off buffer just in case */
+ if (!((s = strchr (LOCAL->buf,'\015')) && (s[1] == '\012'))) {
+ sprintf (tmp,"Unable to find CRLF at %lu in %lu bytes, text: %.80s",
+ (unsigned long) curpos,i,(char *) LOCAL->buf);
+ mm_log (tmp,ERROR);
+ mbx_abort (stream);
+ return NIL;
+ }
+ *s = '\0'; /* tie off header line */
+ i = (s + 2) - 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: %.80s",
+ (unsigned long) curpos,(char *) LOCAL->buf);
+ mm_log (tmp,ERROR);
+ mbx_abort (stream);
+ return NIL;
+ }
+ if (!(isxdigit (t[1]) && isxdigit (t[2]) && isxdigit (t[3]) &&
+ isxdigit (t[4]) && isxdigit (t[5]) && isxdigit (t[6]) &&
+ isxdigit (t[7]) && isxdigit (t[8]) && isxdigit (t[9]) &&
+ isxdigit (t[10]) && isxdigit (t[11]) && isxdigit (t[12]))) {
+ sprintf (tmp,"Unable to parse message flags at %lu: %.80s",
+ (unsigned long) curpos,(char *) LOCAL->buf);
+ mm_log (tmp,ERROR);
+ mbx_abort (stream);
+ return NIL;
+ }
+ if ((t[13] != '-') || t[22] ||
+ !(isxdigit (t[14]) && isxdigit (t[15]) && isxdigit (t[16]) &&
+ isxdigit (t[17]) && isxdigit (t[18]) && isxdigit (t[19]) &&
+ isxdigit (t[20]) && isxdigit (t[21]))) {
+ sprintf (tmp,"Unable to parse message UID at %lu: %.80s",
+ (unsigned long) curpos,(char *) LOCAL->buf);
+ mm_log (tmp,ERROR);
+ mbx_abort (stream);
+ return NIL;
+ }
+
+ *s++ = '\0'; *t++ = '\0'; /* break up fields */
+ /* get message size */
+ if (!(j = strtoul (s,(char **) &x,10)) && (!(x && *x))) {
+ sprintf (tmp,"Unable to parse message size at %lu: %.80s,%.80s;%.80s",
+ (unsigned long) curpos,(char *) LOCAL->buf,(char *) s,
+ (char *) t);
+ mm_log (tmp,ERROR);
+ mbx_abort (stream);
+ return NIL;
+ }
+ /* make sure didn't run off end of file */
+ if (((off_t) (curpos + i + j)) > sbuf.st_size) {
+ sprintf (tmp,"Last message (at %lu) runs past end of file (%lu > %lu)",
+ (unsigned long) curpos,(unsigned long) (curpos + i + j),
+ (unsigned long) sbuf.st_size);
+ mm_log (tmp,ERROR);
+ mbx_abort (stream);
+ return NIL;
+ }
+ /* parse UID */
+ if ((m = strtoul (t+13,NIL,16)) &&
+ ((m <= lastuid) || (m > stream->uid_last))) {
+ if (uidwarn) {
+ sprintf (tmp,"Invalid UID %08lx in message %lu, rebuilding UIDs",
+ m,nmsgs+1);
+ mm_log (tmp,WARN);
+ uidwarn = NIL;
+ /* restart UID validity */
+ stream->uid_validity = (unsigned long) time (0);
+ }
+ m = 0; /* lose this UID */
+ dirty = T; /* mark dirty, set new lastuid */
+ stream->uid_last = lastuid;
+ }
+
+ t[12] = '\0'; /* parse system flags */
+ if ((k = strtoul (t+8,NIL,16)) & fEXPUNGED) {
+ if (m) lastuid = m; /* expunge message, update last UID seen */
+ else { /* no UID assigned? */
+ lastuid = ++stream->uid_last;
+ dirty = T;
+ }
+ }
+ else { /* not expunged, swell the cache */
+ added = T; /* note that a new message was added */
+ mail_exists (stream,++nmsgs);
+ /* instantiate an elt for this message */
+ (elt = mail_elt (stream,nmsgs))->valid = T;
+ /* parse the date */
+ if (!mail_parse_date (elt,LOCAL->buf)) {
+ sprintf (tmp,"Unable to parse message date at %lu: %.80s",
+ (unsigned long) curpos,(char *) LOCAL->buf);
+ mm_log (tmp,ERROR);
+ mbx_abort (stream);
+ return NIL;
+ }
+ /* note file offset of header */
+ elt->private.special.offset = curpos;
+ /* and internal header size */
+ elt->private.special.text.size = i;
+ /* header size not known yet */
+ elt->private.msg.header.text.size = 0;
+ elt->rfc822_size = j; /* note message size */
+ /* calculate system flags */
+ if (k & fSEEN) elt->seen = T;
+ if (k & fDELETED) elt->deleted = T;
+ if (k & fFLAGGED) elt->flagged = T;
+ if (k & fANSWERED) elt->answered = T;
+ if (k & fDRAFT) elt->draft = T;
+ t[8] = '\0'; /* get user flags value */
+ elt->user_flags = strtoul (t,NIL,16);
+ /* UID already assigned? */
+ if (!(elt->private.uid = m) || !(k & fOLD)) {
+ elt->recent = T; /* no, mark as recent */
+ ++recent; /* count up a new recent message */
+ dirty = T; /* and must rewrite header */
+ /* assign new UID */
+ if (!elt->private.uid) elt->private.uid = ++stream->uid_last;
+ mbx_update_status (stream,elt->msgno,NIL);
+ }
+ /* update last parsed UID */
+ lastuid = elt->private.uid;
+ }
+ curpos += i + j; /* update position */
+ }
+
+ if (dirty && !stream->rdonly){/* update header */
+ mbx_update_header (stream);
+ fsync (LOCAL->fd); /* make sure all the UID updates 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 */
+ struct utimbuf times;
+ times.actime = time (0);
+ times.modtime = LOCAL->filetime;
+ utime (stream->mailbox,&times);
+ }
+ 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 */
+}
+
+/* MBX get cache element with status updating from file
+ * Accepts: MAIL stream
+ * message number
+ * expunge OK flag
+ * Returns: cache element
+ */
+
+MESSAGECACHE *mbx_elt (MAILSTREAM *stream,unsigned long msgno,long expok)
+{
+ 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;
+ /* get new flags */
+ if (mbx_read_flags (stream,elt) && expok) {
+ mail_expunged (stream,elt->msgno);
+ return NIL; /* return this message was expunged */
+ }
+ 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;
+}
+
+/* MBX read flags from file
+ * Accepts: MAIL stream
+ * cache element
+ * Returns: non-NIL if message expunged
+ */
+
+unsigned long mbx_read_flags (MAILSTREAM *stream,MESSAGECACHE *elt)
+{
+ unsigned long i;
+ struct stat sbuf;
+ fstat (LOCAL->fd,&sbuf); /* get status */
+ /* make sure file size is good */
+ if (sbuf.st_size < LOCAL->filesize) {
+ sprintf (LOCAL->buf,"Mailbox shrank from %lu to %lu in flag read!",
+ (unsigned long) LOCAL->filesize,(unsigned long) sbuf.st_size);
+ fatal (LOCAL->buf);
+ }
+ /* set the seek pointer */
+ lseek (LOCAL->fd,(off_t) elt->private.special.offset +
+ elt->private.special.text.size - 24,L_SET);
+ /* read the new flags */
+ if (read (LOCAL->fd,LOCAL->buf,14) < 0) {
+ sprintf (LOCAL->buf,"Unable to read new status: %s",strerror (errno));
+ fatal (LOCAL->buf);
+ }
+ if ((LOCAL->buf[0] != ';') || (LOCAL->buf[13] != '-')) {
+ LOCAL->buf[14] = '\0'; /* tie off buffer for error message */
+ sprintf (LOCAL->buf+50,"Invalid flags for message %lu (%lu %lu): %s",
+ elt->msgno,elt->private.special.offset,
+ elt->private.special.text.size,(char *) LOCAL->buf);
+ fatal (LOCAL->buf+50);
+ }
+ LOCAL->buf[13] = '\0'; /* tie off buffer */
+ /* calculate system flags */
+ i = strtoul (LOCAL->buf+9,NIL,16);
+ 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->expunged |= i & fEXPUNGED ? T : NIL;
+ LOCAL->buf[9] = '\0'; /* tie off flags */
+ /* get user flags value */
+ elt->user_flags = strtoul (LOCAL->buf+1,NIL,16);
+ elt->valid = T; /* have valid flags now */
+ return i & fEXPUNGED;
+}
+
+/* MBX update header
+ * Accepts: MAIL stream
+ */
+
+#define NTKLUDGEOFFSET 7
+
+void mbx_update_header (MAILSTREAM *stream)
+{
+ int i;
+ char *s = LOCAL->buf;
+ memset (s,'\0',HDRSIZE); /* initialize header */
+ sprintf (s,"*mbx*\015\012%08lx%08lx\015\012",
+ stream->uid_validity,stream->uid_last);
+ for (i = 0; (i < NUSERFLAGS) && stream->user_flags[i]; ++i)
+ sprintf (s += strlen (s),"%s\015\012",stream->user_flags[i]);
+ LOCAL->ffuserflag = i; /* first free user flag */
+ /* can we create more user flags? */
+ stream->kwd_create = (i < NUSERFLAGS) ? T : NIL;
+ /* write reserved lines */
+ while (i++ < NUSERFLAGS) strcat (s,"\015\012");
+ while (T) { /* rewind file */
+ lseek (LOCAL->fd,NTKLUDGEOFFSET,L_SET);
+ /* write new header */
+ if (write (LOCAL->fd,LOCAL->buf + NTKLUDGEOFFSET,
+ HDRSIZE - NTKLUDGEOFFSET) > 0) break;
+ mm_notify (stream,strerror (errno),WARN);
+ mm_diskerror (stream,errno,T);
+ }
+}
+
+/* MBX update status string
+ * Accepts: MAIL stream
+ * message number
+ * flags
+ */
+
+void mbx_update_status (MAILSTREAM *stream,unsigned long msgno,long flags)
+{
+ struct stat sbuf;
+ MESSAGECACHE *elt = mail_elt (stream,msgno);
+ /* readonly */
+ if (stream->rdonly || !elt->valid) mbx_read_flags (stream,elt);
+ else { /* readwrite */
+ fstat (LOCAL->fd,&sbuf); /* get status */
+ /* make sure file size is good */
+ if (sbuf.st_size < LOCAL->filesize) {
+ sprintf (LOCAL->buf,"Mailbox shrank from %lu to %lu in flag update!",
+ (unsigned long) LOCAL->filesize,(unsigned long) sbuf.st_size);
+ fatal (LOCAL->buf);
+ }
+ /* set the seek pointer */
+ lseek (LOCAL->fd,(off_t) elt->private.special.offset +
+ elt->private.special.text.size - 24,L_SET);
+ /* read the new flags */
+ if (read (LOCAL->fd,LOCAL->buf,14) < 0) {
+ sprintf (LOCAL->buf,"Unable to read old status: %s",strerror (errno));
+ fatal (LOCAL->buf);
+ }
+ if ((LOCAL->buf[0] != ';') || (LOCAL->buf[13] != '-')) {
+ LOCAL->buf[14] = '\0'; /* tie off buffer for error message */
+ sprintf (LOCAL->buf+50,"Invalid flags for message %lu (%lu %lu): %s",
+ elt->msgno,elt->private.special.offset,
+ elt->private.special.text.size,(char *) LOCAL->buf);
+ fatal (LOCAL->buf+50);
+ }
+ /* print new flag string */
+ sprintf (LOCAL->buf,"%08lx%04x-%08lx",elt->user_flags,(unsigned)
+ (((elt->deleted && flags) ?
+ fEXPUNGED : (strtoul (LOCAL->buf+9,NIL,16)) & fEXPUNGED) +
+ (fSEEN * elt->seen) + (fDELETED * elt->deleted) +
+ (fFLAGGED * elt->flagged) + (fANSWERED * elt->answered) +
+ (fDRAFT * elt->draft) + fOLD),elt->private.uid);
+ while (T) { /* get to that place in the file */
+ lseek (LOCAL->fd,(off_t) elt->private.special.offset +
+ elt->private.special.text.size - 23,L_SET);
+ /* write new flags and UID */
+ if (write (LOCAL->fd,LOCAL->buf,21) > 0) break;
+ mm_notify (stream,strerror (errno),WARN);
+ mm_diskerror (stream,errno,T);
+ }
+ }
+}
+
+/* MBX locate header for a message
+ * Accepts: MAIL stream
+ * message number
+ * pointer to returned header size
+ * pointer to possible returned header
+ * Returns: position of header in file
+ */
+
+#define HDRBUFLEN 16384 /* good enough for most headers */
+#define SLOP 4 /* CR LF CR LF */
+
+unsigned long mbx_hdrpos (MAILSTREAM *stream,unsigned long msgno,
+ unsigned long *size,char **hdr)
+{
+ unsigned long siz,done;
+ long i;
+ unsigned char *s,*t,*te;
+ MESSAGECACHE *elt = mail_elt (stream,msgno);
+ unsigned long ret = elt->private.special.offset +
+ elt->private.special.text.size;
+ if (hdr) *hdr = NIL; /* assume no header returned */
+ /* is header size known? */
+ if (*size = elt->private.msg.header.text.size) return ret;
+ /* paranoia check */
+ if (LOCAL->buflen < (HDRBUFLEN + SLOP))
+ fatal ("LOCAL->buf smaller than HDRBUFLEN");
+ lseek (LOCAL->fd,ret,L_SET); /* get to header position */
+ /* read HDRBUFLEN chunks with 4 byte slop */
+ for (done = siz = 0, s = LOCAL->buf;
+ (i = min ((long) (elt->rfc822_size - done),(long) HDRBUFLEN)) &&
+ (read (LOCAL->fd,s,i) == i);
+ done += i, siz += (t - LOCAL->buf) - SLOP, s = LOCAL->buf + SLOP) {
+ te = (t = s + i) - 12; /* calculate end of fast scan */
+ /* fast scan for CR */
+ for (s = LOCAL->buf; s < te;)
+ if (((*s++ == '\015') || (*s++ == '\015') || (*s++ == '\015') ||
+ (*s++ == '\015') || (*s++ == '\015') || (*s++ == '\015') ||
+ (*s++ == '\015') || (*s++ == '\015') || (*s++ == '\015') ||
+ (*s++ == '\015') || (*s++ == '\015') || (*s++ == '\015')) &&
+ (*s == '\012') && (*++s == '\015') && (*++s == '\012')) {
+ *size = elt->private.msg.header.text.size = siz + (++s - LOCAL->buf);
+ if (hdr) *hdr = LOCAL->buf;
+ return ret;
+ }
+ for (te = t - 3; (s < te);) /* final character-at-a-time scan */
+ if ((*s++ == '\015') && (*s == '\012') && (*++s == '\015') &&
+ (*++s == '\012')) {
+ *size = elt->private.msg.header.text.size = siz + (++s - LOCAL->buf);
+ if (hdr) *hdr = LOCAL->buf;
+ return ret;
+ }
+ if (i <= SLOP) break; /* end of data */
+ /* slide over last 4 bytes */
+ memmove (LOCAL->buf,t - SLOP,SLOP);
+ hdr = NIL; /* can't return header this way */
+ }
+ /* not found: header consumes entire message */
+ elt->private.msg.header.text.size = *size = elt->rfc822_size;
+ if (hdr) *hdr = LOCAL->buf; /* possibly return header too */
+ return ret;
+}
+
+/* MBX mail rewrite mailbox
+ * Accepts: MAIL stream
+ * pointer to return reclaimed size
+ * flags (0 = no expunge, 1 = expunge deleted, -1 = expunge sequence)
+ * Returns: number of expunged messages
+ */
+
+unsigned long mbx_rewrite (MAILSTREAM *stream,unsigned long *reclaimed,
+ long flags)
+{
+ struct utimbuf times;
+ struct stat sbuf;
+ off_t pos,ppos;
+ int ld;
+ unsigned long i,j,k,m,delta;
+ unsigned long n = *reclaimed = 0;
+ unsigned long recent = 0;
+ char lock[MAILTMPLEN];
+ MESSAGECACHE *elt;
+ /* get parse/append permission */
+ if ((ld = lockname (lock,stream->mailbox,LOCK_EX)) < 0) {
+ mm_log ("Unable to lock expunge mailbox",ERROR);
+ return 0;
+ }
+ fstat (LOCAL->fd,&sbuf); /* get current write time */
+ if (LOCAL->filetime && !LOCAL->flagcheck &&
+ (LOCAL->filetime < sbuf.st_mtime)) LOCAL->flagcheck = T;
+ if (!mbx_parse (stream)) { /* make sure see any newly-arrived messages */
+ unlockfd (ld,lock); /* failed?? */
+ return 0;
+ }
+ if (LOCAL->flagcheck) { /* sweep flags if need flagcheck */
+ LOCAL->filetime = sbuf.st_mtime;
+ for (i = 1; i <= stream->nmsgs; ++i) mbx_elt (stream,i,NIL);
+ LOCAL->flagcheck = NIL;
+ }
+
+ /* get exclusive access */
+ if (!flock (LOCAL->fd,LOCK_EX|LOCK_NB)) {
+ mm_critical (stream); /* go critical */
+ for (i = 1,delta = 0,pos = ppos = HDRSIZE; i <= stream->nmsgs; ) {
+ /* note if message not at predicted location */
+ if (m = (elt = mbx_elt (stream,i,NIL))->private.special.offset - ppos) {
+ ppos = elt->private.special.offset;
+ *reclaimed += m; /* note reclaimed message space */
+ delta += m; /* and as expunge delta */
+ }
+ /* number of bytes to smash or preserve */
+ ppos += (k = elt->private.special.text.size + elt->rfc822_size);
+ /* if need to expunge this message*/
+ if (flags && elt->deleted && ((flags > 0) || elt->sequence)) {
+ delta += k; /* number of bytes to delete */
+ mail_expunged(stream,i);/* notify upper levels */
+ n++; /* count up one more expunged message */
+ }
+ else { /* preserved message */
+ i++; /* count this message */
+ if (elt->recent) ++recent;
+ if (delta) { /* moved, note 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 */
+ 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 yet */
+ else pos = elt->private.special.offset + k;
+ }
+ }
+ /* deltaed file size match position? */
+ if (m = (LOCAL->filesize -= delta) - pos) {
+ *reclaimed += m; /* probably an fEXPUNGED msg */
+ LOCAL->filesize = pos; /* set correct size */
+ }
+ /* truncate file after last message */
+ ftruncate (LOCAL->fd,LOCAL->filesize);
+ fsync (LOCAL->fd); /* force disk update */
+ mm_nocritical (stream); /* release critical */
+ flock (LOCAL->fd,LOCK_SH); /* allow sharers again */
+ }
+
+ else { /* can't get exclusive */
+ flock (LOCAL->fd,LOCK_SH); /* recover previous shared mailbox lock */
+ /* do hide-expunge when shared */
+ if (flags) for (i = 1; i <= stream->nmsgs; ) {
+ if (elt = mbx_elt (stream,i,T)) {
+ /* make the message invisible */
+ if (elt->deleted && ((flags > 0) || elt->sequence)) {
+ mbx_update_status (stream,elt->msgno,LONGT);
+ /* notify upper levels */
+ mail_expunged (stream,i);
+ n++; /* count up one more expunged message */
+ }
+ else {
+ i++; /* preserved message */
+ if (elt->recent) ++recent;
+ }
+ }
+ else n++; /* count up one more expunged message */
+ }
+ fsync (LOCAL->fd); /* force disk update */
+ }
+ fstat (LOCAL->fd,&sbuf); /* get new write time */
+ times.modtime = LOCAL->filetime = sbuf.st_mtime;
+ times.actime = time (0); /* reset atime to now */
+ utime (stream->mailbox,&times);
+ unlockfd (ld,lock); /* release exclusive parse/append permission */
+ /* notify upper level of new mailbox size */
+ mail_exists (stream,stream->nmsgs);
+ mail_recent (stream,recent);
+ return n; /* return number of expunged messages */
+}
+
+/* MBX mail lock for flag updating
+ * Accepts: stream
+ * Returns: T if successful, NIL if failure
+ */
+
+long mbx_flaglock (MAILSTREAM *stream)
+{
+ struct stat sbuf;
+ unsigned long i;
+ int ld;
+ char lock[MAILTMPLEN];
+ /* no-op if readonly or already locked */
+ if (!stream->rdonly && LOCAL && (LOCAL->fd >= 0) && (LOCAL->ld < 0)) {
+ /* lock now */
+ if ((ld = lockname (lock,stream->mailbox,LOCK_EX)) < 0) return NIL;
+ if (!LOCAL->flagcheck) { /* don't do this if flagcheck already needed */
+ if (LOCAL->filetime) { /* know previous time? */
+ fstat (LOCAL->fd,&sbuf);/* get current write time */
+ if (LOCAL->filetime < sbuf.st_mtime) LOCAL->flagcheck = T;
+ LOCAL->filetime = 0; /* don't do this test for any other messages */
+ }
+ if (!mbx_parse (stream)) {/* parse mailbox */
+ unlockfd (ld,lock); /* shouldn't happen */
+ return NIL;
+ }
+ if (LOCAL->flagcheck) /* invalidate cache if flagcheck */
+ for (i = 1; i <= stream->nmsgs; ++i) mail_elt (stream,i)->valid = NIL;
+ }
+ LOCAL->ld = ld; /* copy to stream for subsequent calls */
+ memcpy (LOCAL->lock,lock,MAILTMPLEN);
+ }
+ return LONGT;
+}
generated by cgit v1.2.3-54-g00ecf (git 2.44.0) at 2024-07-12 19:05:26 +0000