shell bypass 403
/* ========================================================================
* Copyright 1988-2006 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: Berkeley 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: 24 June 1992
* Last Edited: 30 August 2006
*/
/* Dedication:
* This file is dedicated with affection to those Merry Marvels of Musical
* Madness . . .
* -> The Incomparable Leland Stanford Junior University Marching Band <-
* who entertain, awaken, and outrage Stanford fans in the fact of repeated
* losing seasons and shattered Rose Bowl dreams [Cardinal just don't have
* HUSKY FEVER!!!].
*
*/
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include "mail.h"
#include "osdep.h"
#include <time.h>
#include <sys\stat.h>
#include <dos.h>
#include "rfc822.h"
#include "dummy.h"
#include "misc.h"
#include "fdstring.h"
/* Berkeley I/O stream local data */
typedef struct bezerk_local {
int fd; /* file descriptor for I/O */
off_t filesize; /* file size parsed */
char *buf; /* temporary buffer */
} BEZERKLOCAL;
/* Convenient access to local data */
#define LOCAL ((BEZERKLOCAL *) stream->local)
/* Function prototypes */
DRIVER *bezerk_valid (char *name);
long bezerk_isvalid (char *name,char *tmp);
int bezerk_valid_line (char *s,char **rx,int *rzn);
void *bezerk_parameters (long function,void *value);
void bezerk_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents);
void bezerk_list (MAILSTREAM *stream,char *ref,char *pat);
void bezerk_lsub (MAILSTREAM *stream,char *ref,char *pat);
long bezerk_create (MAILSTREAM *stream,char *mailbox);
long bezerk_delete (MAILSTREAM *stream,char *mailbox);
long bezerk_rename (MAILSTREAM *stream,char *old,char *newname);
MAILSTREAM *bezerk_open (MAILSTREAM *stream);
void bezerk_close (MAILSTREAM *stream,long options);
char *bezerk_header (MAILSTREAM *stream,unsigned long msgno,
unsigned long *length,long flags);
long bezerk_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,
long flags);
long bezerk_ping (MAILSTREAM *stream);
void bezerk_check (MAILSTREAM *stream);
long bezerk_expunge (MAILSTREAM *stream,char *sequence,long options);
long bezerk_copy (MAILSTREAM *stream,char *sequence,char *mailbox,
long options);
long bezerk_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data);
int bezerk_append_msg (MAILSTREAM *stream,FILE *sf,char *flags,char *date,
STRING *msg);
void bezerk_gc (MAILSTREAM *stream,long gcflags);
char *bezerk_file (char *dst,char *name);
long bezerk_badname (char *tmp,char *s);
long bezerk_parse (MAILSTREAM *stream);
unsigned long bezerk_hdrpos (MAILSTREAM *stream,unsigned long msgno,
unsigned long *size);
/* Berkeley mail routines */
/* Driver dispatch used by MAIL */
DRIVER bezerkdriver = {
"bezerk", /* driver name */
/* driver flags */
DR_LOCAL|DR_MAIL|DR_LOWMEM|DR_CRLF|DR_NOSTICKY,
(DRIVER *) NIL, /* next driver */
bezerk_valid, /* mailbox is valid for us */
bezerk_parameters, /* manipulate parameters */
bezerk_scan, /* scan mailboxes */
bezerk_list, /* list mailboxes */
bezerk_lsub, /* list subscribed mailboxes */
NIL, /* subscribe to mailbox */
NIL, /* unsubscribe from mailbox */
bezerk_create, /* create mailbox */
bezerk_delete, /* delete mailbox */
bezerk_rename, /* rename mailbox */
mail_status_default, /* status of mailbox */
bezerk_open, /* open mailbox */
bezerk_close, /* close mailbox */
NIL, /* fetch message "fast" attributes */
NIL, /* fetch message flags */
NIL, /* fetch overview */
NIL, /* fetch message envelopes */
bezerk_header, /* fetch message header */
bezerk_text, /* fetch message text */
NIL, /* fetch partial message text */
NIL, /* unique identifier */
NIL, /* message number */
NIL, /* modify flags */
NIL, /* per-message modify flags */
NIL, /* search for message based on criteria */
NIL, /* sort messages */
NIL, /* thread messages */
bezerk_ping, /* ping mailbox to see if still alive */
bezerk_check, /* check for new messages */
bezerk_expunge, /* expunge deleted messages */
bezerk_copy, /* copy messages to another mailbox */
bezerk_append, /* append string message to mailbox */
NIL /* garbage collect stream */
};
/* prototype stream */
MAILSTREAM bezerkproto = {&bezerkdriver};
/* Berkeley mail validate mailbox
* Accepts: mailbox name
* Returns: our driver if name is valid, NIL otherwise
*/
DRIVER *bezerk_valid (char *name)
{
char tmp[MAILTMPLEN];
return bezerk_isvalid (name,tmp) ? &bezerkdriver : (DRIVER *) NIL;
}
/* Berkeley mail test for valid mailbox
* Accepts: mailbox name
* Returns: T if valid, NIL otherwise
*/
long bezerk_isvalid (char *name,char *tmp)
{
int fd;
long ret = NIL;
struct stat sbuf;
errno = EINVAL; /* assume invalid argument */
/* if file, get its status */
if ((*name != '{') && mailboxfile (tmp,name) && !stat (tmp,&sbuf)) {
if (!sbuf.st_size)errno = 0;/* empty file */
else if ((fd = open (tmp,O_BINARY|O_RDONLY,NIL)) >= 0) {
memset (tmp,'\0',MAILTMPLEN);
errno = -1; /* in case bezerk_valid_line fails */
if (read (fd,tmp,MAILTMPLEN-1) >= 0)
ret = bezerk_valid_line (tmp,NIL,NIL);
close (fd); /* close the file */
}
}
/* in case INBOX but not bezerk format */
else if ((errno == ENOENT) && ((name[0] == 'I') || (name[0] == 'i')) &&
((name[1] == 'N') || (name[1] == 'n')) &&
((name[2] == 'B') || (name[2] == 'b')) &&
((name[3] == 'O') || (name[3] == 'o')) &&
((name[4] == 'X') || (name[4] == 'x')) && !name[5]) errno = -1;
return ret; /* return what we should */
}
/* Validate line
* Accepts: pointer to candidate string to validate as a From header
* return pointer to end of date/time field
* return pointer to offset from t of time (hours of ``mmm dd hh:mm'')
* return pointer to offset from t of time zone (if non-zero)
* Returns: t,ti,zn set if valid From string, else ti is NIL
*/
int bezerk_valid_line (char *s,char **rx,int *rzn)
{
char *x;
int zn;
int ti = 0;
/* line must begin with "From " */
if ((*s != 'F') || (s[1] != 'r') || (s[2] != 'o') || (s[3] != 'm') ||
(s[4] != ' ')) return NIL;
/* find end of line */
for (x = s + 5; *x && *x != '\012'; x++);
if (!x) return NIL; /* end of line not found */
if (x[-1] == '\015') x--; /* ignore CR */
if ((x - s < 27)) return NIL; /* line too short */
if (x - s >= 41) { /* possible search for " remote from " */
for (zn = -1; x[zn] != ' '; zn--);
if ((x[zn-1] == 'm') && (x[zn-2] == 'o') && (x[zn-3] == 'r') &&
(x[zn-4] == 'f') && (x[zn-5] == ' ') && (x[zn-6] == 'e') &&
(x[zn-7] == 't') && (x[zn-8] == 'o') && (x[zn-9] == 'm') &&
(x[zn-10] == 'e') && (x[zn-11] == 'r') && (x[zn-12] == ' '))
x += zn - 12;
}
if (x[-5] == ' ') { /* ends with year? */
/* no timezone? */
if (x[-8] == ':') zn = 0,ti = -5;
/* three letter timezone? */
else if (x[-9] == ' ') ti = zn = -9;
/* numeric timezone? */
else if ((x[-11]==' ') && ((x[-10]=='+') || (x[-10]=='-'))) ti = zn = -11;
}
else if (x[-4] == ' ') { /* no year and three leter timezone? */
if (x[-9] == ' ') zn = -4,ti = -9;
}
else if (x[-6] == ' ') { /* no year and numeric timezone? */
if ((x[-11] == ' ') && ((x[-5] == '+') || (x[-5] == '-')))
zn = -6,ti = -11;
}
/* time must be www mmm dd hh:mm[:ss] */
if (ti && !((x[ti - 3] == ':') &&
(x[ti -= ((x[ti - 6] == ':') ? 9 : 6)] == ' ') &&
(x[ti - 3] == ' ') && (x[ti - 7] == ' ') &&
(x[ti - 11] == ' '))) return NIL;
if (rx) *rx = x; /* set return values */
if (rzn) *rzn = zn;
return ti;
}
/* Berkeley manipulate driver parameters
* Accepts: function code
* function-dependent value
* Returns: function-dependent return value
*/
void *bezerk_parameters (long function,void *value)
{
return NIL;
}
/* Berkeley mail scan mailboxes
* Accepts: mail stream
* reference
* pattern to search
* string to scan
*/
void bezerk_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents)
{
if (stream) dummy_scan (NIL,ref,pat,contents);
}
/* Berkeley mail list mailboxes
* Accepts: mail stream
* reference
* pattern to search
*/
void bezerk_list (MAILSTREAM *stream,char *ref,char *pat)
{
if (stream) dummy_list (stream,ref,pat);
}
/* Berkeley mail list subscribed mailboxes
* Accepts: mail stream
* reference
* pattern to search
*/
void bezerk_lsub (MAILSTREAM *stream,char *ref,char *pat)
{
if (stream) dummy_lsub (stream,ref,pat);
}
/* Berkeley mail create mailbox
* Accepts: MAIL stream
* mailbox name to create
* Returns: T on success, NIL on failure
*/
long bezerk_create (MAILSTREAM *stream,char *mailbox)
{
return dummy_create (stream,mailbox);
}
/* Berkeley mail delete mailbox
* Accepts: MAIL stream
* mailbox name to delete
* Returns: T on success, NIL on failure
*/
long bezerk_delete (MAILSTREAM *stream,char *mailbox)
{
return dummy_delete (stream,mailbox);
}
/* Berkeley mail rename mailbox
* Accepts: MAIL stream
* old mailbox name
* new mailbox name (or NIL for delete)
* Returns: T on success, NIL on failure
*/
long bezerk_rename (MAILSTREAM *stream,char *old,char *newname)
{
return dummy_rename (stream,old,newname);
}
/* Berkeley mail open
* Accepts: stream to open
* Returns: stream on success, NIL on failure
*/
MAILSTREAM *bezerk_open (MAILSTREAM *stream)
{
long i;
int fd;
char *s;
char tmp[MAILTMPLEN];
/* return prototype for OP_PROTOTYPE call */
if (!stream) return &bezerkproto;
if (stream->local) fatal ("bezerk recycle stream");
if (!mailboxfile (tmp,stream->mailbox))
return (MAILSTREAM *) bezerk_badname (tmp,stream->mailbox);
if (((fd = open (tmp,O_BINARY|O_RDONLY,NIL)) < 0)) {
sprintf (tmp,"Can't open mailbox: %s",strerror (errno));
mm_log (tmp,ERROR);
return NIL;
}
stream->rdonly = T; /* this driver is readonly */
stream->local = fs_get (sizeof (BEZERKLOCAL));
/* canonicalize the stream mailbox name */
fs_give ((void **) &stream->mailbox);
if (s = strchr ((s = strrchr (tmp,'\\')) ? s : tmp,'.')) *s = '\0';
stream->mailbox = cpystr (tmp);
LOCAL->fd = fd; /* note the file */
LOCAL->filesize = 0; /* initialize parsed file size */
LOCAL->buf = NIL; /* initially no local buffer */
stream->sequence++; /* bump sequence number */
stream->uid_validity = time (0);
/* parse mailbox */
stream->nmsgs = stream->recent = 0;
if (!bezerk_ping (stream)) return NIL;
if (!stream->nmsgs) mm_log ("Mailbox is empty",(long) NIL);
stream->perm_seen = stream->perm_deleted =
stream->perm_flagged = stream->perm_answered = stream->perm_draft = NIL;
stream->perm_user_flags = NIL;
return stream; /* return stream to caller */
}
/* Berkeley mail close
* Accepts: MAIL stream
* close options
*/
void bezerk_close (MAILSTREAM *stream,long options)
{
if (stream && LOCAL) { /* only if a file is open */
int silent = stream->silent;
stream->silent = T;
if (options & CL_EXPUNGE) bezerk_expunge (stream,NIL,NIL);
close (LOCAL->fd); /* close the local file */
if (LOCAL->buf) fs_give ((void **) &LOCAL->buf);
/* nuke the local data */
fs_give ((void **) &stream->local);
stream->dtb = NIL; /* log out the DTB */
}
}
/* Berkeley 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 *bezerk_header (MAILSTREAM *stream,unsigned long msgno,
unsigned long *length,long flags)
{
char tmp[MAILTMPLEN];
*length = 0; /* default to empty */
if (flags & FT_UID) return "";/* UID call "impossible" */
/* get to header position */
lseek (LOCAL->fd,bezerk_hdrpos (stream,msgno,length),L_SET);
/* is buffer big enough? */
if (LOCAL->buf) fs_give ((void **) &LOCAL->buf);
LOCAL->buf = (char *) fs_get ((size_t) *length + 1);
LOCAL->buf[*length] = '\0'; /* tie off string */
/* slurp the data */
read (LOCAL->fd,LOCAL->buf,(size_t) *length);
return LOCAL->buf;
}
/* Berkeley mail fetch message text (body only)
* Accepts: MAIL stream
* message # to fetch
* pointer to returned header text length
* option flags
* Returns: T, always
*/
long bezerk_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags)
{
MESSAGECACHE *elt;
FDDATA d;
unsigned long hdrsize,hdrpos;
/* UID call "impossible" */
if (flags & FT_UID) return NIL;
elt = mail_elt (stream,msgno);/* if message not seen */
/* mark message as seen */
if (elt->seen && !(flags & FT_PEEK)) {
elt->seen = T;
mm_flags (stream,msgno);
}
/* get location of text data */
hdrpos = bezerk_hdrpos (stream,msgno,&hdrsize);
d.fd = LOCAL->fd; /* set initial stringstruct */
d.pos = hdrpos + hdrsize;
/* flush old buffer */
if (LOCAL->buf) fs_give ((void **) &LOCAL->buf);
d.chunk = LOCAL->buf = (char *) fs_get ((size_t) d.chunksize = CHUNKSIZE);
INIT (bs,fd_string,(void *) &d,elt->rfc822_size - hdrsize);
return T; /* success */
}
/* Berkeley mail ping mailbox
* Accepts: MAIL stream
* Returns: T if stream still alive, NIL if not
*/
long bezerk_ping (MAILSTREAM *stream)
{
/* punt if stream no longer alive */
if (!(stream && LOCAL)) return NIL;
/* parse mailbox, punt if parse dies */
return (bezerk_parse (stream)) ? T : NIL;
}
/* Berkeley mail check mailbox (reparses status too)
* Accepts: MAIL stream
*/
void bezerk_check (MAILSTREAM *stream)
{
unsigned long i = 1;
if (bezerk_ping (stream)) { /* ping mailbox */
/* get new message status */
while (i <= stream->nmsgs) mail_elt (stream,i++);
mm_log ("Check completed",(long) NIL);
}
}
/* Berkeley mail expunge mailbox
* Accepts: MAIL stream
* sequence to expunge if non-NIL
* expunge options
* Returns: T, always
*/
long bezerk_expunge (MAILSTREAM *stream,char *sequence,long options)
{
if (!stream->silent) mm_log ("Expunge ignored on readonly mailbox",WARN);
return LONGT;
}
/* Berkeley mail copy message(s)
* Accepts: MAIL stream
* sequence
* destination mailbox
* copy options
* Returns: T if success, NIL if failed
*/
long bezerk_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options)
{
char tmp[MAILTMPLEN];
struct stat sbuf;
MESSAGECACHE *elt;
unsigned long i,j,k;
int fd;
mailproxycopy_t pc =
(mailproxycopy_t) mail_parameters (stream,GET_MAILPROXYCOPY,NIL);
if (!((options & CP_UID) ? mail_uid_sequence (stream,sequence) :
mail_sequence (stream,sequence))) return NIL;
/* make sure valid mailbox */
if (!bezerk_isvalid (mailbox,tmp) && errno) {
if (errno == ENOENT)
mm_notify (stream,"[TRYCREATE] Must create mailbox before append",
(long) NIL);
else if (pc) return (*pc) (stream,sequence,mailbox,options);
else if (mailboxfile (tmp,mailbox)) {
sprintf (tmp,"Not a Bezerk-format mailbox: %s",mailbox);
mm_log (tmp,ERROR);
}
else bezerk_badname (tmp,mailbox);
return NIL;
}
/* open the destination */
if (!mailboxfile (tmp,mailbox) ||
(fd = open (tmp,O_BINARY|O_WRONLY|O_APPEND|O_CREAT,
S_IREAD|S_IWRITE)) < 0) {
sprintf (tmp,"Unable to open copy mailbox: %s",strerror (errno));
mm_log (tmp,ERROR);
return NIL;
}
mm_critical (stream); /* go critical */
fstat (fd,&sbuf); /* get current file size */
/* for each requested message */
for (i = 1; i <= stream->nmsgs; i++)
if ((elt = mail_elt (stream,i))->sequence) {
lseek (LOCAL->fd,elt->private.special.offset,SEEK_SET);
/* number of bytes to copy */
j = elt->private.msg.full.offset + elt->rfc822_size;
do { /* read from source position */
k = min (j,(unsigned long) MAILTMPLEN);
read (LOCAL->fd,tmp,(unsigned int) k);
if (write (fd,tmp,(unsigned int) k) < 0) {
sprintf (tmp,"Unable to write message: %s",strerror (errno));
mm_log (tmp,ERROR);
chsize (fd,sbuf.st_size);
close (fd); /* punt */
mm_nocritical (stream);
return NIL;
}
} while (j -= k); /* until done */
}
close (fd); /* close the file */
mm_nocritical (stream); /* release critical */
/* delete all requested messages */
if (options & CP_MOVE) for (i = 1; i <= stream->nmsgs; i++)
if ((elt = mail_elt (stream,i))->sequence) elt->deleted = T;
if (mail_parameters (NIL,GET_COPYUID,NIL))
mm_log ("Can not return meaningful COPYUID with this mailbox format",WARN);
return T;
}
/* Berkeley mail append message from stringstruct
* Accepts: MAIL stream
* destination mailbox
* append callback
* data for callback
* Returns: T if append successful, else NIL
*/
#define BUFLEN MAILTMPLEN
long bezerk_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data)
{
struct stat sbuf;
int fd;
unsigned long i,j;
char *flags,*date,buf[BUFLEN],tmp[MAILTMPLEN],file[MAILTMPLEN];
FILE *sf,*df;
MESSAGECACHE elt;
STRING *message;
long ret = LONGT;
/* default stream to prototype */
if (!stream) stream = &bezerkproto;
/* make sure valid mailbox */
if (!bezerk_isvalid (mailbox,tmp) && errno) {
if (errno == ENOENT) {
if (((mailbox[0] == 'I') || (mailbox[0] == 'i')) &&
((mailbox[1] == 'N') || (mailbox[1] == 'n')) &&
((mailbox[2] == 'B') || (mailbox[2] == 'b')) &&
((mailbox[3] == 'O') || (mailbox[3] == 'o')) &&
((mailbox[4] == 'X') || (mailbox[4] == 'x')) && !mailbox[5])
bezerk_create (NIL,"INBOX");
else {
mm_notify (stream,"[TRYCREATE] Must create mailbox before append",NIL);
return NIL;
}
}
else if (mailboxfile (tmp,mailbox)) {
sprintf (tmp,"Not a Bezerk-format mailbox: %.80ss",mailbox);
mm_log (tmp,ERROR);
}
else bezerk_badname (tmp,mailbox);
return NIL;
}
tzset (); /* initialize timezone stuff */
/* get first message */
if (!(*af) (stream,data,&flags,&date,&message)) return NIL;
if (!(sf = tmpfile ())) { /* must have scratch file */
sprintf (tmp,"Unable to create scratch file: %.80s",strerror (errno));
mm_log (tmp,ERROR);
}
do { /* parse date */
if (!date) rfc822_date (date = tmp);
if (!mail_parse_date (&elt,date)) {
sprintf (tmp,"Bad date in append: %.80s",date);
mm_log (tmp,ERROR);
}
else { /* user wants to suppress time zones? */
if (mail_parameters (NIL,GET_NOTIMEZONES,NIL)) {
time_t when = mail_longdate (&elt);
date = ctime (&when); /* use traditional date */
}
/* use POSIX-style date */
else date = mail_cdate (tmp,&elt);
if (!SIZE (message)) mm_log ("Append of zero-length message",ERROR);
else if (!bezerk_append_msg (stream,sf,flags,date,message)) {
sprintf (tmp,"Error writing scratch file: %.80s",strerror (errno));
mm_log (tmp,ERROR);
}
/* get next message */
else if ((*af) (stream,data,&flags,&date,&message)) continue;
}
fclose (sf); /* punt scratch file */
return NIL; /* give up */
} while (message); /* until no more messages */
if (fflush (sf) || fstat (fileno (sf),&sbuf)) {
sprintf (tmp,"Error finishing scratch file: %.80s",strerror (errno));
mm_log (tmp,ERROR);
fclose (sf); /* punt scratch file */
return NIL; /* give up */
}
i = sbuf.st_size; /* size of scratch file */
mm_critical (stream); /* go critical */
/* open the destination */
if (!mailboxfile (tmp,mailbox) ||
((fd = open (tmp,O_BINARY|O_WRONLY|O_APPEND|O_CREAT,
S_IREAD|S_IWRITE)) < 0) ||
!(df = fdopen (fd,"ab"))) {
mm_nocritical (stream); /* done with critical */
sprintf (tmp,"Can't open append mailbox: %s",strerror (errno));
mm_log (tmp,ERROR);
return NIL;
}
fstat (fd,&sbuf); /* get current file size */
while (i) /* until written all bytes */
if ((j = fread (buf,1,min ((long) BUFLEN,i),sf)) &&
(fwrite (buf,1,j,df) == j)) i -= j;
fclose (sf); /* done with scratch file */
/* make sure append wins */
if (i || (fflush (df) == EOF)) {
chsize (fd,sbuf.st_size); /* revert file */
close (fd); /* make sure fclose() doesn't corrupt us */
sprintf (buf,"Message append failed: %s",strerror (errno));
mm_log (buf,ERROR);
ret = NIL; /* return error */
}
fclose (df);
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;
}
/* Write single message to append scratch file
* Accepts: MAIL stream
* scratch file
* flags
* message stringstruct
* Returns: NIL if write error, else T
*/
int bezerk_append_msg (MAILSTREAM *stream,FILE *sf,char *flags,char *date,
STRING *msg)
{
int c;
unsigned long i,uf;
char tmp[MAILTMPLEN];
long f = mail_parse_flags (stream,flags,&uf);
/* build initial header */
if ((fprintf (sf,"From %s@%s %sStatus: ",
myusername (),mylocalhost (),date) < 0) ||
(f&fSEEN && (putc ('R',sf) == EOF)) ||
(fputs ("\nX-Status: ",sf) == EOF) ||
(f&fDELETED && (putc ('D',sf) == EOF)) ||
(f&fFLAGGED && (putc ('F',sf) == EOF)) ||
(f&fANSWERED && (putc ('A',sf) == EOF)) ||
(f&fDRAFT && (putc ('T',sf) == EOF)) ||
(fputs ("\nX-Keywords:",sf) == EOF)) return NIL;
while (uf) /* write user flags */
if (fprintf (sf," %s",stream->user_flags[find_rightmost_bit (&uf)]) < 0)
return NIL;
/* tie off flags */
if (putc ('\n',sf) == EOF) return NIL;
while (SIZE (msg)) { /* copy text to scratch file */
/* possible delimiter if line starts with F */
if ((c = 0xff & SNX (msg)) == 'F') {
/* copy line to buffer */
for (i = 1,tmp[0] = c; SIZE (msg) && (c != '\n') && (i < MAILTMPLEN);)
if (((c = 0xff & SNX (msg)) != '\r') || !(SIZE (msg)) ||
(CHR (msg) != '\n')) tmp[i++] = c;
if ((i > 4) && (tmp[1] == 'r') && (tmp[2] == 'o') && (tmp[3] == 'm') &&
(tmp[4] == ' ')) { /* possible "From " line? */
/* yes, see if need to write a widget */
if (((c != '\n') || bezerk_valid_line (tmp,NIL,NIL)) &&
(putc ('>',sf) == EOF)) return NIL;
}
/* write buffered text */
if (fwrite (tmp,1,i,sf) != i) return NIL;
if (c == '\n') continue; /* all done if got a complete line */
}
/* copy line, toss out CR from CRLF */
do if (((c == '\r') && SIZE (msg) && ((c = 0xff & SNX (msg)) != '\n') &&
(putc ('\r',sf) == EOF)) || (putc (c,sf) == EOF)) return NIL;
while ((c != '\n') && SIZE (msg) && ((c = 0xff & SNX (msg)) ? c : T));
}
/* write trailing newline and return */
return (putc ('\n',sf) == EOF) ? NIL : T;
}
/* Return bad file name error message
* Accepts: temporary buffer
* file name
* Returns: long NIL always
*/
long bezerk_badname (char *tmp,char *s)
{
sprintf (tmp,"Invalid mailbox name: %s",s);
mm_log (tmp,ERROR);
return (long) NIL;
}
/* Parse mailbox
* Accepts: MAIL stream
* Returns: T if parse OK
* NIL if failure, stream aborted
*/
long bezerk_parse (MAILSTREAM *stream)
{
struct stat sbuf;
MESSAGECACHE *elt;
char *s,*t,tmp[MAILTMPLEN + 1],*db,datemsg[100];
long i;
int j,ti,zn;
long curpos = LOCAL->filesize;
long nmsgs = stream->nmsgs;
long recent = stream->recent;
short silent = stream->silent;
fstat (LOCAL->fd,&sbuf); /* get status */
if (sbuf.st_size < curpos) { /* sanity check */
sprintf (tmp,"Mailbox shrank from %ld to %ld!",curpos,sbuf.st_size);
mm_log (tmp,ERROR);
bezerk_close (stream,NIL);
return NIL;
}
stream->silent = T; /* don't pass up mm_exists() events yet */
db = datemsg + strlen (strcpy (datemsg,"Unparsable date: "));
/* while there is data to read */
while (i = sbuf.st_size - curpos){
/* get to that position in the file */
lseek (LOCAL->fd,curpos,SEEK_SET);
/* read first buffer's worth */
read (LOCAL->fd,tmp,j = (int) min (i,(long) MAILTMPLEN));
tmp[j] = '\0'; /* tie off buffer */
if (!(ti = bezerk_valid_line (tmp,&t,&zn))) {
mm_log ("Mailbox format invalidated (consult an expert), aborted",ERROR);
bezerk_close (stream,NIL);
return NIL;
}
/* 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;
/* note offset of message */
elt->private.msg.full.offset =
(s = ((*t == '\015') ? (t + 2) : (t + 1))) - tmp;
/* generate plausable IMAPish date string */
db[2] = db[6] = db[20] = '-'; db[11] = ' '; db[14] = db[17] = ':';
/* dd */
db[0] = t[ti - 2]; db[1] = t[ti - 1];
/* mmm */
db[3] = t[ti - 6]; db[4] = t[ti - 5]; db[5] = t[ti - 4];
/* hh */
db[12] = t[ti + 1]; db[13] = t[ti + 2];
/* mm */
db[15] = t[ti + 4]; db[16] = t[ti + 5];
if (t[ti += 6] == ':') { /* ss if present */
db[18] = t[++ti]; db[19] = t[++ti];
ti++; /* move to space */
}
else db[18] = db[19] = '0'; /* assume 0 seconds */
/* yy -- advance over timezone if necessary */
if (++zn == ++ti) ti += (((t[zn] == '+') || (t[zn] == '-')) ? 6 : 4);
db[7] = t[ti]; db[8] = t[ti + 1]; db[9] = t[ti + 2]; db[10] = t[ti + 3];
t = zn ? (t + zn) : "LCL"; /* zzz */
db[21] = *t++; db[22] = *t++; db[23] = *t++;
if ((db[21] != '+') && (db[21] != '-')) db[24] = '\0';
else { /* numeric time zone */
db[20] = ' '; db[24] = *t++; db[25] = *t++; db[26] = '\0';
}
/* set internal date */
if (!mail_parse_date (elt,db)) mm_log (datemsg,WARN);
curpos += s - tmp; /* advance position after header */
t = strchr (s,'\012'); /* start of next line */
/* find start of next message */
while (!(bezerk_valid_line (s,NIL,NIL))) {
if (t) { /* have next line? */
t++; /* advance to new line */
curpos += t - s; /* update position and size */
elt->rfc822_size += ((t - s) + ((t[-2] == '\015') ? 0 : 1));
s = t; /* move to next line */
t = strchr (s,'\012');
}
else { /* try next buffer */
j = strlen (s); /* length of unread data in buffer */
if ((i = sbuf.st_size - curpos) && (i != j)) {
/* get to that position in the file */
lseek (LOCAL->fd,curpos,SEEK_SET);
/* read another buffer's worth */
read (LOCAL->fd,s = tmp,j = (int) min (i,(long) MAILTMPLEN));
tmp[j] = '\0'; /* tie off buffer */
if (!(t = strchr (s,'\012'))) fatal ("Line too long in mailbox");
}
else {
curpos += j; /* last bit of data */
elt->rfc822_size += j;
break;
}
}
}
}
/* update parsed file size */
LOCAL->filesize = sbuf.st_size;
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 T; /* return the winnage */
}
/* Berkeley locate header for a message
* Accepts: MAIL stream
* message number
* pointer to returned header size
* Returns: position of header in file
*/
unsigned long bezerk_hdrpos (MAILSTREAM *stream,unsigned long msgno,
unsigned long *size)
{
long siz;
size_t i = 0;
char c = '\0';
char *s;
char tmp[MAILTMPLEN];
MESSAGECACHE *elt = mail_elt (stream,msgno);
long pos = elt->private.special.offset + elt->private.msg.full.offset;
/* is size known? */
if (!(*size = elt->private.msg.header.text.size)) {
/* get to header position */
lseek (LOCAL->fd,pos,SEEK_SET);
/* search message for CRLF CRLF */
for (siz = 1; siz <= elt->rfc822_size; siz++) {
if (!i && /* buffer empty? */
(read (LOCAL->fd,s = tmp,
i = (size_t) min(elt->rfc822_size-siz,(long)MAILTMPLEN))<= 0))
return pos;
else i--;
/* two newline sequence? */
if ((c == '\012') && (*s == '\012')) {
/* yes, note for later */
elt->private.msg.header.text.size = (*size = siz);
return pos; /* return to caller */
}
else if ((c == '\012') && (*s == '\015')) {
/* yes, note for later */
elt->private.msg.header.text.size = (*size = siz + 1);
return pos; /* return to caller */
}
else c = *s++; /* next character */
}
}
return pos; /* have position */
}