Viewing file:  mh.c (39.67 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/* ========================================================================
* 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: MH mail routines
*
* Author(s): Mark Crispin
* Networks and Distributed Computing
* Computing & Communications
* University of Washington
* Administration Building, AG-44
* Seattle, WA 98195
* Internet: MRC@CAC.Washington.EDU
*
* Date: 23 February 1992
* Last Edited: 11 October 2007
*/
#include <stdio.h>
#include <ctype.h>
#include <errno.h>
extern int errno; /* just in case */
#include "mail.h"
#include "osdep.h"
#include <pwd.h>
#include <sys/stat.h>
#include <sys/time.h>
#include "misc.h"
#include "dummy.h"
#include "fdstring.h"
/* Build parameters */
#define MHINBOX "#mhinbox" /* corresponds to namespace in env_unix.c */
#define MHINBOXDIR "inbox"
#define MHPROFILE ".mh_profile"
#define MHCOMMA ','
#define MHSEQUENCE ".mh_sequence"
#define MHSEQUENCES ".mh_sequences"
#define MHPATH "Mail"
/* mh_load_message() flags */
#define MLM_HEADER 0x1 /* load message text */
#define MLM_TEXT 0x2 /* load message text */
/* MH I/O stream local data */
typedef struct mh_local {
char *dir; /* spool directory name */
unsigned char buf[CHUNKSIZE]; /* temporary buffer */
unsigned long cachedtexts; /* total size of all cached texts */
time_t scantime; /* last time directory scanned */
} MHLOCAL;
/* Convenient access to local data */
#define LOCAL ((MHLOCAL *) stream->local)
/* Function prototypes */
DRIVER *mh_valid (char *name);
int mh_isvalid (char *name,char *tmp,long synonly);
int mh_namevalid (char *name);
char *mh_path (char *tmp);
void *mh_parameters (long function,void *value);
long mh_dirfmttest (char *name);
void mh_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents);
void mh_list (MAILSTREAM *stream,char *ref,char *pat);
void mh_lsub (MAILSTREAM *stream,char *ref,char *pat);
void mh_list_work (MAILSTREAM *stream,char *dir,char *pat,long level);
long mh_subscribe (MAILSTREAM *stream,char *mailbox);
long mh_unsubscribe (MAILSTREAM *stream,char *mailbox);
long mh_create (MAILSTREAM *stream,char *mailbox);
long mh_delete (MAILSTREAM *stream,char *mailbox);
long mh_rename (MAILSTREAM *stream,char *old,char *newname);
MAILSTREAM *mh_open (MAILSTREAM *stream);
void mh_close (MAILSTREAM *stream,long options);
void mh_fast (MAILSTREAM *stream,char *sequence,long flags);
void mh_load_message (MAILSTREAM *stream,unsigned long msgno,long flags);
char *mh_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *length,
long flags);
long mh_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags);
long mh_ping (MAILSTREAM *stream);
void mh_check (MAILSTREAM *stream);
long mh_expunge (MAILSTREAM *stream,char *sequence,long options);
long mh_copy (MAILSTREAM *stream,char *sequence,char *mailbox,
long options);
long mh_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data);
int mh_select (struct direct *name);
int mh_numsort (const void *d1,const void *d2);
char *mh_file (char *dst,char *name);
long mh_canonicalize (char *pattern,char *ref,char *pat);
void mh_setdate (char *file,MESSAGECACHE *elt);
/* MH mail routines */
/* Driver dispatch used by MAIL */
DRIVER mhdriver = {
"mh", /* driver name */
/* driver flags */
DR_MAIL|DR_LOCAL|DR_NOFAST|DR_NAMESPACE|DR_NOSTICKY|DR_DIRFMT,
(DRIVER *) NIL, /* next driver */
mh_valid, /* mailbox is valid for us */
mh_parameters, /* manipulate parameters */
mh_scan, /* scan mailboxes */
mh_list, /* find mailboxes */
mh_lsub, /* find subscribed mailboxes */
mh_subscribe, /* subscribe to mailbox */
mh_unsubscribe, /* unsubscribe from mailbox */
mh_create, /* create mailbox */
mh_delete, /* delete mailbox */
mh_rename, /* rename mailbox */
mail_status_default, /* status of mailbox */
mh_open, /* open mailbox */
mh_close, /* close mailbox */
mh_fast, /* fetch message "fast" attributes */
NIL, /* fetch message flags */
NIL, /* fetch overview */
NIL, /* fetch message envelopes */
mh_header, /* fetch message header */
mh_text, /* fetch message body */
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 */
mh_ping, /* ping mailbox to see if still alive */
mh_check, /* check for new messages */
mh_expunge, /* expunge deleted messages */
mh_copy, /* copy messages to another mailbox */
mh_append, /* append string message to mailbox */
NIL /* garbage collect stream */
};
/* prototype stream */
MAILSTREAM mhproto = {&mhdriver};
static char *mh_profile = NIL; /* holds MH profile */
static char *mh_pathname = NIL; /* holds MH path name */
static long mh_once = 0; /* already snarled once */
static long mh_allow_inbox =NIL;/* allow INBOX as well as MHINBOX */
/* MH mail validate mailbox
* Accepts: mailbox name
* Returns: our driver if name is valid, NIL otherwise
*/
DRIVER *mh_valid (char *name)
{
char tmp[MAILTMPLEN];
return mh_isvalid (name,tmp,T) ? &mhdriver : NIL;
}
/* MH mail test for valid mailbox
* Accepts: mailbox name
* temporary buffer to use
* syntax only test flag
* Returns: T if valid, NIL otherwise
*/
int mh_isvalid (char *name,char *tmp,long synonly)
{
struct stat sbuf;
char *s,*t,altname[MAILTMPLEN];
unsigned long i;
int ret = NIL;
errno = NIL; /* zap any error condition */
/* mh name? */
if ((mh_allow_inbox && !compare_cstring (name,"INBOX")) ||
!compare_cstring (name,MHINBOX) ||
((name[0] == '#') && ((name[1] == 'm') || (name[1] == 'M')) &&
((name[2] == 'h') || (name[2] == 'H')) && (name[3] == '/') && name[4])){
if (mh_path (tmp)) /* validate name if INBOX or not synonly */
ret = (synonly && compare_cstring (name,"INBOX")) ?
T : ((stat (mh_file (tmp,name),&sbuf) == 0) &&
(sbuf.st_mode & S_IFMT) == S_IFDIR);
else if (!mh_once++) { /* only report error once */
sprintf (tmp,"%.900s not found, mh format names disabled",mh_profile);
mm_log (tmp,WARN);
}
}
/* see if non-NS name within mh hierarchy */
else if ((name[0] != '#') && (s = mh_path (tmp)) && (i = strlen (s)) &&
(t = mailboxfile (tmp,name)) && !strncmp (t,s,i) &&
(tmp[i] == '/') && tmp[i+1]) {
sprintf (altname,"#mh%.900s",tmp+i);
/* can't do synonly here! */
ret = mh_isvalid (altname,tmp,NIL);
}
else errno = EINVAL; /* bogus name */
return ret;
}
/* MH mail test for valid mailbox
* Accepts: mailbox name
* Returns: T if valid, NIL otherwise
*/
int mh_namevalid (char *name)
{
char *s;
if (name[0] == '#' && (name[1] == 'm' || name[1] == 'M') &&
(name[2] == 'h' || name[2] == 'H') && name[3] == '/')
for (s = name; s && *s;) { /* make sure no all-digit nodes */
if (isdigit (*s)) s++; /* digit, check this node further... */
else if (*s == '/') break;/* all digit node, barf */
/* non-digit, skip to next node or return */
else if (!((s = strchr (s+1,'/')) && *++s)) return T;
}
return NIL; /* all numeric or empty node */
}
/* Return MH path
* Accepts: temporary buffer
* Returns: MH path or NIL if MH disabled
*/
char *mh_path (char *tmp)
{
char *s,*t,*v,*r;
int fd;
struct stat sbuf;
if (!mh_profile) { /* build mh_profile and mh_pathname now */
sprintf (tmp,"%s/%s",myhomedir (),MHPROFILE);
if ((fd = open (mh_profile = cpystr (tmp),O_RDONLY,NIL)) >= 0) {
fstat (fd,&sbuf); /* yes, get size and read file */
read (fd,(t = (char *) fs_get (sbuf.st_size + 1)),sbuf.st_size);
close (fd); /* don't need the file any more */
t[sbuf.st_size] = '\0'; /* tie it off */
/* parse profile file */
for (s = strtok_r (t,"\r\n",&r); s && *s; s = strtok_r (NIL,"\r\n",&r)) {
/* found space in line? */
if (v = strpbrk (s," \t")) {
*v++ = '\0'; /* tie off, is keyword "Path:"? */
if (!compare_cstring (s,"Path:")) {
/* skip whitespace */
while ((*v == ' ') || (*v == '\t')) ++v;
/* absolute path? */
if (*v == '/') s = v;
else sprintf (s = tmp,"%s/%s",myhomedir (),v);
/* copy name */
mh_pathname = cpystr (s);
break; /* don't need to look at rest of file */
}
}
}
fs_give ((void **) &t); /* flush profile text */
if (!mh_pathname) { /* default path if not in the profile */
sprintf (tmp,"%s/%s",myhomedir (),MHPATH);
mh_pathname = cpystr (tmp);
}
}
}
return mh_pathname;
}
/* MH manipulate driver parameters
* Accepts: function code
* function-dependent value
* Returns: function-dependent return value
*/
void *mh_parameters (long function,void *value)
{
void *ret = NIL;
switch ((int) function) {
case GET_INBOXPATH:
if (value) ret = mh_file ((char *) value,"INBOX");
break;
case GET_DIRFMTTEST:
ret = (void *) mh_dirfmttest;
break;
case SET_MHPROFILE:
if (mh_profile) fs_give ((void **) &mh_profile);
mh_profile = cpystr ((char *) value);
case GET_MHPROFILE:
ret = (void *) mh_profile;
break;
case SET_MHPATH:
if (mh_pathname) fs_give ((void **) &mh_pathname);
mh_pathname = cpystr ((char *) value);
case GET_MHPATH:
ret = (void *) mh_pathname;
break;
case SET_MHALLOWINBOX:
mh_allow_inbox = value ? T : NIL;
case GET_MHALLOWINBOX:
ret = (void *) (mh_allow_inbox ? VOIDT : NIL);
}
return ret;
}
/* MH test for directory format internal node
* Accepts: candidate node name
* Returns: T if internal name, NIL otherwise
*/
long mh_dirfmttest (char *s)
{
int c;
/* sequence(s) file is an internal name */
if (strcmp (s,MHSEQUENCE) && strcmp (s,MHSEQUENCES)) {
if (*s == MHCOMMA) ++s; /* else comma + all numeric name */
/* success if all-numeric */
while (c = *s++) if (!isdigit (c)) return NIL;
}
return LONGT;
}
/* MH scan mailboxes
* Accepts: mail stream
* reference
* pattern to search
* string to scan
*/
void mh_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents)
{
char *s,test[MAILTMPLEN],file[MAILTMPLEN];
long i = 0;
if (!pat || !*pat) { /* empty pattern? */
if (mh_canonicalize (test,ref,"*")) {
/* tie off name at root */
if (s = strchr (test,'/')) *++s = '\0';
else test[0] = '\0';
mm_list (stream,'/',test,LATT_NOSELECT);
}
}
/* get canonical form of name */
else if (mh_canonicalize (test,ref,pat)) {
if (contents) { /* maybe I'll implement this someday */
mm_log ("Scan not valid for mh mailboxes",ERROR);
return;
}
if (test[3] == '/') { /* looking down levels? */
/* yes, found any wildcards? */
if (s = strpbrk (test,"%*")) {
/* yes, copy name up to that point */
strncpy (file,test+4,i = s - (test+4));
file[i] = '\0'; /* tie off */
}
else strcpy (file,test+4);/* use just that name then */
/* find directory name */
if (s = strrchr (file,'/')) {
*s = '\0'; /* found, tie off at that point */
s = file;
}
/* do the work */
mh_list_work (stream,s,test,0);
}
/* always an INBOX */
if (!compare_cstring (test,MHINBOX))
mm_list (stream,NIL,MHINBOX,LATT_NOINFERIORS);
}
}
/* MH list mailboxes
* Accepts: mail stream
* reference
* pattern to search
*/
void mh_list (MAILSTREAM *stream,char *ref,char *pat)
{
mh_scan (stream,ref,pat,NIL);
}
/* MH list subscribed mailboxes
* Accepts: mail stream
* reference
* pattern to search
*/
void mh_lsub (MAILSTREAM *stream,char *ref,char *pat)
{
void *sdb = NIL;
char *s,test[MAILTMPLEN];
/* get canonical form of name */
if (mh_canonicalize (test,ref,pat) && (s = sm_read (&sdb))) {
do if (pmatch_full (s,test,'/')) mm_lsub (stream,'/',s,NIL);
while (s = sm_read (&sdb)); /* until no more subscriptions */
}
}
/* MH list mailboxes worker routine
* Accepts: mail stream
* directory name to search
* search pattern
* search level
*/
void mh_list_work (MAILSTREAM *stream,char *dir,char *pat,long level)
{
DIR *dp;
struct direct *d;
struct stat sbuf;
char *cp,*np,curdir[MAILTMPLEN],name[MAILTMPLEN];
/* build MH name to search */
if (dir) sprintf (name,"#mh/%s/",dir);
else strcpy (name,"#mh/");
/* make directory name, punt if bogus */
if (!mh_file (curdir,name)) return;
cp = curdir + strlen (curdir);/* end of directory name */
np = name + strlen (name); /* end of MH name */
if (dp = opendir (curdir)) { /* open directory */
while (d = readdir (dp)) /* scan, ignore . and numeric names */
if ((d->d_name[0] != '.') && !mh_select (d)) {
strcpy (cp,d->d_name); /* make directory name */
if (!stat (curdir,&sbuf) && ((sbuf.st_mode & S_IFMT) == S_IFDIR)) {
strcpy (np,d->d_name);/* make mh name of directory name */
/* yes, an MH name if full match */
if (pmatch_full (name,pat,'/')) mm_list (stream,'/',name,NIL);
/* check if should recurse */
if (dmatch (name,pat,'/') &&
(level < (long) mail_parameters (NIL,GET_LISTMAXLEVEL,NIL)))
mh_list_work (stream,name+4,pat,level+1);
}
}
closedir (dp); /* all done, flush directory */
}
}
/* MH mail subscribe to mailbox
* Accepts: mail stream
* mailbox to add to subscription list
* Returns: T on success, NIL on failure
*/
long mh_subscribe (MAILSTREAM *stream,char *mailbox)
{
return sm_subscribe (mailbox);
}
/* MH mail unsubscribe to mailbox
* Accepts: mail stream
* mailbox to delete from subscription list
* Returns: T on success, NIL on failure
*/
long mh_unsubscribe (MAILSTREAM *stream,char *mailbox)
{
return sm_unsubscribe (mailbox);
}
/* MH mail create mailbox
* Accepts: mail stream
* mailbox name to create
* Returns: T on success, NIL on failure
*/
long mh_create (MAILSTREAM *stream,char *mailbox)
{
char tmp[MAILTMPLEN];
if (!mh_namevalid (mailbox)) /* validate name */
sprintf (tmp,"Can't create mailbox %.80s: invalid MH-format name",mailbox);
/* must not already exist */
else if (mh_isvalid (mailbox,tmp,NIL))
sprintf (tmp,"Can't create mailbox %.80s: mailbox already exists",mailbox);
else if (!mh_path (tmp)) return NIL;
/* try to make it */
else if (!(mh_file (tmp,mailbox) &&
dummy_create_path (stream,strcat (tmp,"/"),
get_dir_protection (mailbox))))
sprintf (tmp,"Can't create mailbox %.80s: %s",mailbox,strerror (errno));
else return LONGT; /* success */
mm_log (tmp,ERROR);
return NIL;
}
/* MH mail delete mailbox
* mailbox name to delete
* Returns: T on success, NIL on failure
*/
long mh_delete (MAILSTREAM *stream,char *mailbox)
{
DIR *dirp;
struct direct *d;
int i;
char tmp[MAILTMPLEN];
/* is mailbox valid? */
if (!mh_isvalid (mailbox,tmp,NIL)) {
sprintf (tmp,"Can't delete mailbox %.80s: no such mailbox",mailbox);
mm_log (tmp,ERROR);
return NIL;
}
/* get name of directory */
i = strlen (mh_file (tmp,mailbox));
if (dirp = opendir (tmp)) { /* open directory */
tmp[i++] = '/'; /* now apply trailing delimiter */
/* massacre all mh owned files */
while (d = readdir (dirp)) if (mh_dirfmttest (d->d_name)) {
strcpy (tmp + i,d->d_name);
unlink (tmp); /* sayonara */
}
closedir (dirp); /* flush directory */
}
/* try to remove the directory */
if (rmdir (mh_file (tmp,mailbox))) {
sprintf (tmp,"Can't delete mailbox %.80s: %s",mailbox,strerror (errno));
mm_log (tmp,WARN);
}
return T; /* return success */
}
/* MH mail rename mailbox
* Accepts: MH mail stream
* old mailbox name
* new mailbox name
* Returns: T on success, NIL on failure
*/
long mh_rename (MAILSTREAM *stream,char *old,char *newname)
{
char c,*s,tmp[MAILTMPLEN],tmp1[MAILTMPLEN];
struct stat sbuf;
/* old mailbox name must be valid */
if (!mh_isvalid (old,tmp,NIL))
sprintf (tmp,"Can't rename mailbox %.80s: no such mailbox",old);
else if (!mh_namevalid (newname))
sprintf (tmp,"Can't rename to mailbox %.80s: invalid MH-format name",
newname);
/* new mailbox name must not be valid */
else if (mh_isvalid (newname,tmp,NIL))
sprintf (tmp,"Can't rename to mailbox %.80s: destination already exists",
newname);
/* success if can rename the directory */
else { /* found superior to destination name? */
if (s = strrchr (mh_file (tmp1,newname),'/')) {
c = *++s; /* remember first character of inferior */
*s = '\0'; /* tie off to get just superior */
/* name doesn't exist, create it */
if ((stat (tmp1,&sbuf) || ((sbuf.st_mode & S_IFMT) != S_IFDIR)) &&
!dummy_create_path (stream,tmp1,get_dir_protection (newname)))
return NIL;
*s = c; /* restore full name */
}
if (!rename (mh_file (tmp,old),tmp1)) return T;
sprintf (tmp,"Can't rename mailbox %.80s to %.80s: %s",
old,newname,strerror (errno));
}
mm_log (tmp,ERROR); /* something failed */
return NIL;
}
/* MH mail open
* Accepts: stream to open
* Returns: stream on success, NIL on failure
*/
MAILSTREAM *mh_open (MAILSTREAM *stream)
{
char tmp[MAILTMPLEN];
if (!stream) return &mhproto; /* return prototype for OP_PROTOTYPE call */
if (stream->local) fatal ("mh recycle stream");
stream->local = fs_get (sizeof (MHLOCAL));
/* INBOXness is one of the following:
* #mhinbox (case-independent)
* #mh/inbox (mh is case-independent, inbox is case-dependent)
* INBOX (case-independent
*/
stream->inbox = /* note if an INBOX or not */
(!compare_cstring (stream->mailbox,MHINBOX) ||
((stream->mailbox[0] == '#') &&
((stream->mailbox[1] == 'm') || (stream->mailbox[1] == 'M')) &&
((stream->mailbox[2] == 'h') || (stream->mailbox[2] == 'H')) &&
(stream->mailbox[3] == '/') && !strcmp (stream->mailbox+4,MHINBOXDIR)) ||
!compare_cstring (stream->mailbox,"INBOX")) ? T : NIL;
mh_file (tmp,stream->mailbox);/* get directory name */
LOCAL->dir = cpystr (tmp); /* copy directory name for later */
LOCAL->scantime = 0; /* not scanned yet */
LOCAL->cachedtexts = 0; /* no cached texts */
stream->sequence++; /* bump sequence number */
/* parse mailbox */
stream->nmsgs = stream->recent = 0;
if (!mh_ping (stream)) return NIL;
if (!(stream->nmsgs || stream->silent))
mm_log ("Mailbox is empty",(long) NIL);
return stream; /* return stream to caller */
}
/* MH mail close
* Accepts: MAIL stream
* close options
*/
void mh_close (MAILSTREAM *stream,long options)
{
if (LOCAL) { /* only if a file is open */
int silent = stream->silent;
stream->silent = T; /* note this stream is dying */
if (options & CL_EXPUNGE) mh_expunge (stream,NIL,NIL);
if (LOCAL->dir) fs_give ((void **) &LOCAL->dir);
/* nuke the local data */
fs_give ((void **) &stream->local);
stream->dtb = NIL; /* log out the DTB */
stream->silent = silent; /* reset silent state */
}
}
/* MH mail fetch fast information
* Accepts: MAIL stream
* sequence
* option flags
*/
void mh_fast (MAILSTREAM *stream,char *sequence,long flags)
{
MESSAGECACHE *elt;
unsigned long i;
/* set up metadata for all messages */
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 &&
!(elt->day && elt->rfc822_size)) mh_load_message (stream,i,NIL);
}
/* MH load message into cache
* Accepts: MAIL stream
* message #
* option flags
*/
void mh_load_message (MAILSTREAM *stream,unsigned long msgno,long flags)
{
unsigned long i,j,nlseen;
int fd;
unsigned char c,*t;
struct stat sbuf;
MESSAGECACHE *elt;
FDDATA d;
STRING bs;
elt = mail_elt (stream,msgno);/* get elt */
/* build message file name */
sprintf (LOCAL->buf,"%s/%lu",LOCAL->dir,elt->private.uid);
/* anything we need not currently cached? */
if ((!elt->day || !elt->rfc822_size ||
((flags & MLM_HEADER) && !elt->private.msg.header.text.data) ||
((flags & MLM_TEXT) && !elt->private.msg.text.text.data)) &&
((fd = open (LOCAL->buf,O_RDONLY,NIL)) >= 0)) {
fstat (fd,&sbuf); /* get file metadata */
d.fd = fd; /* set up file descriptor */
d.pos = 0; /* start of file */
d.chunk = LOCAL->buf;
d.chunksize = CHUNKSIZE;
INIT (&bs,fd_string,&d,sbuf.st_size);
if (!elt->day) { /* set internaldate to file date */
struct tm *tm = gmtime (&sbuf.st_mtime);
elt->day = tm->tm_mday; elt->month = tm->tm_mon + 1;
elt->year = tm->tm_year + 1900 - BASEYEAR;
elt->hours = tm->tm_hour; elt->minutes = tm->tm_min;
elt->seconds = tm->tm_sec;
elt->zhours = 0; elt->zminutes = 0;
}
if (!elt->rfc822_size) { /* know message size yet? */
for (i = 0, j = SIZE (&bs), nlseen = 0; j--; ) switch (SNX (&bs)) {
case '\015': /* unlikely carriage return */
if (!j || (CHR (&bs) != '\012')) {
i++; /* ugh, raw CR */
nlseen = NIL;
break;
}
SNX (&bs); /* eat the line feed, drop in */
--j;
case '\012': /* line feed? */
i += 2; /* count a CRLF */
/* header size known yet? */
if (!elt->private.msg.header.text.size && nlseen) {
/* note position in file */
elt->private.special.text.size = GETPOS (&bs);
/* and CRLF-adjusted size */
elt->private.msg.header.text.size = i;
}
nlseen = T; /* note newline seen */
break;
default: /* ordinary chararacter */
i++;
nlseen = NIL;
break;
}
SETPOS (&bs,0); /* restore old position */
elt->rfc822_size = i; /* note that we have size now */
/* header is entire message if no delimiter */
if (!elt->private.msg.header.text.size)
elt->private.msg.header.text.size = elt->rfc822_size;
/* text is remainder of message */
elt->private.msg.text.text.size =
elt->rfc822_size - elt->private.msg.header.text.size;
}
/* need to load cache with message data? */
if (((flags & MLM_HEADER) && !elt->private.msg.header.text.data) ||
((flags & MLM_TEXT) && !elt->private.msg.text.text.data)) {
/* purge cache if too big */
if (LOCAL->cachedtexts > max (stream->nmsgs * 4096,2097152)) {
/* just can't keep that much */
mail_gc (stream,GC_TEXTS);
LOCAL->cachedtexts = 0;
}
if ((flags & MLM_HEADER) && !elt->private.msg.header.text.data) {
t = elt->private.msg.header.text.data =
(unsigned char *) fs_get (elt->private.msg.header.text.size + 1);
LOCAL->cachedtexts += elt->private.msg.header.text.size;
/* read in message header */
for (i = 0; i < elt->private.msg.header.text.size; i++)
switch (c = SNX (&bs)) {
case '\015': /* unlikely carriage return */
*t++ = c;
if ((CHR (&bs) == '\012')) {
*t++ = SNX (&bs);
i++;
}
break;
case '\012': /* line feed? */
*t++ = '\015';
i++;
default:
*t++ = c;
break;
}
*t = '\0'; /* tie off string */
if ((t - elt->private.msg.header.text.data) !=
elt->private.msg.header.text.size) fatal ("mh hdr size mismatch");
}
if ((flags & MLM_TEXT) && !elt->private.msg.text.text.data) {
t = elt->private.msg.text.text.data =
(unsigned char *) fs_get (elt->private.msg.text.text.size + 1);
SETPOS (&bs,elt->private.special.text.size);
LOCAL->cachedtexts += elt->private.msg.text.text.size;
/* read in message text */
for (i = 0; i < elt->private.msg.text.text.size; i++)
switch (c = SNX (&bs)) {
case '\015': /* unlikely carriage return */
*t++ = c;
if ((CHR (&bs) == '\012')) {
*t++ = SNX (&bs);
i++;
}
break;
case '\012': /* line feed? */
*t++ = '\015';
i++;
default:
*t++ = c;
break;
}
*t = '\0'; /* tie off string */
if ((t - elt->private.msg.text.text.data) !=
elt->private.msg.text.text.size) fatal ("mh txt size mismatch");
}
}
close (fd); /* flush message file */
}
}
/* MH 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 *mh_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *length,
long flags)
{
MESSAGECACHE *elt;
*length = 0; /* default to empty */
if (flags & FT_UID) return "";/* UID call "impossible" */
elt = mail_elt (stream,msgno);/* get elt */
if (!elt->private.msg.header.text.data)
mh_load_message (stream,msgno,MLM_HEADER);
*length = elt->private.msg.header.text.size;
return (char *) elt->private.msg.header.text.data;
}
/* MH mail fetch message text (body only)
* Accepts: MAIL stream
* message # to fetch
* pointer to returned stringstruct
* option flags
* Returns: T on success, NIL on failure
*/
long mh_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags)
{
MESSAGECACHE *elt;
/* UID call "impossible" */
if (flags & FT_UID) return NIL;
elt = mail_elt (stream,msgno);/* get elt */
/* snarf message if don't have it yet */
if (!elt->private.msg.text.text.data) {
mh_load_message (stream,msgno,MLM_TEXT);
if (!elt->private.msg.text.text.data) return NIL;
}
if (!(flags & FT_PEEK)) { /* mark as seen */
mail_elt (stream,msgno)->seen = T;
mm_flags (stream,msgno);
}
INIT (bs,mail_string,elt->private.msg.text.text.data,
elt->private.msg.text.text.size);
return T;
}
/* MH mail ping mailbox
* Accepts: MAIL stream
* Returns: T if stream alive, else NIL
*/
long mh_ping (MAILSTREAM *stream)
{
MAILSTREAM *sysibx = NIL;
MESSAGECACHE *elt,*selt;
struct stat sbuf;
char *s,tmp[MAILTMPLEN];
int fd;
unsigned long i,j,r;
unsigned long old = stream->uid_last;
long nmsgs = stream->nmsgs;
long recent = stream->recent;
int silent = stream->silent;
if (stat (LOCAL->dir,&sbuf)) {/* directory exists? */
if (stream->inbox && /* no, create if INBOX */
dummy_create_path (stream,strcat (mh_file (tmp,MHINBOX),"/"),
get_dir_protection ("INBOX"))) return T;
sprintf (tmp,"Can't open mailbox %.80s: no such mailbox",stream->mailbox);
mm_log (tmp,ERROR);
return NIL;
}
stream->silent = T; /* don't pass up mm_exists() events yet */
if (sbuf.st_ctime != LOCAL->scantime) {
struct direct **names = NIL;
long nfiles = scandir (LOCAL->dir,&names,mh_select,mh_numsort);
if (nfiles < 0) nfiles = 0; /* in case error */
/* note scanned now */
LOCAL->scantime = sbuf.st_ctime;
/* scan directory */
for (i = 0; i < nfiles; ++i) {
/* if newly seen, add to list */
if ((j = atoi (names[i]->d_name)) > old) {
mail_exists (stream,++nmsgs);
stream->uid_last = (elt = mail_elt (stream,nmsgs))->private.uid = j;
elt->valid = T; /* note valid flags */
if (old) { /* other than the first pass? */
elt->recent = T; /* yup, mark as recent */
recent++; /* bump recent count */
}
else { /* see if already read */
sprintf (tmp,"%s/%s",LOCAL->dir,names[i]->d_name);
if (!stat (tmp,&sbuf) && (sbuf.st_atime > sbuf.st_mtime))
elt->seen = T;
}
}
fs_give ((void **) &names[i]);
}
/* free directory */
if (s = (void *) names) fs_give ((void **) &s);
}
/* if INBOX, snarf from system INBOX */
if (stream->inbox && strcmp (sysinbox (),stream->mailbox)) {
old = stream->uid_last;
mm_critical (stream); /* go critical */
/* see if anything in system inbox */
if (!stat (sysinbox (),&sbuf) && sbuf.st_size &&
(sysibx = mail_open (sysibx,sysinbox (),OP_SILENT)) &&
!sysibx->rdonly && (r = sysibx->nmsgs)) {
for (i = 1; i <= r; ++i) {/* for each message in sysinbox mailbox */
/* build file name we will use */
sprintf (LOCAL->buf,"%s/%lu",LOCAL->dir,++old);
/* snarf message from Berkeley mailbox */
selt = mail_elt (sysibx,i);
if (((fd = open (LOCAL->buf,O_WRONLY|O_CREAT|O_EXCL,
(long) mail_parameters (NIL,GET_MBXPROTECTION,NIL)))
>= 0) &&
(s = mail_fetchheader_full (sysibx,i,NIL,&j,FT_INTERNAL)) &&
(write (fd,s,j) == j) &&
(s = mail_fetchtext_full (sysibx,i,&j,FT_INTERNAL|FT_PEEK)) &&
(write (fd,s,j) == j) && !fsync (fd) && !close (fd)) {
/* swell the cache */
mail_exists (stream,++nmsgs);
stream->uid_last = /* create new elt, note its file number */
(elt = mail_elt (stream,nmsgs))->private.uid = old;
recent++; /* bump recent count */
/* set up initial flags and date */
elt->valid = elt->recent = T;
elt->seen = selt->seen;
elt->deleted = selt->deleted;
elt->flagged = selt->flagged;
elt->answered = selt->answered;
elt->draft = selt->draft;
elt->day = selt->day;elt->month = selt->month;elt->year = selt->year;
elt->hours = selt->hours;elt->minutes = selt->minutes;
elt->seconds = selt->seconds;
elt->zhours = selt->zhours; elt->zminutes = selt->zminutes;
elt->zoccident = selt->zoccident;
mh_setdate (LOCAL->buf,elt);
sprintf (tmp,"%lu",i);/* delete it from the sysinbox */
mail_flag (sysibx,tmp,"\\Deleted",ST_SET);
}
else { /* failed to snarf */
if (fd) { /* did it ever get opened? */
close (fd); /* close descriptor */
unlink (LOCAL->buf);/* flush this file */
}
sprintf (tmp,"Message copy to MH mailbox failed: %.80s",
s,strerror (errno));
mm_log (tmp,ERROR);
r = 0; /* stop the snarf in its tracks */
}
}
/* update scan time */
if (!stat (LOCAL->dir,&sbuf)) LOCAL->scantime = sbuf.st_ctime;
mail_expunge (sysibx); /* now expunge all those messages */
}
if (sysibx) mail_close (sysibx);
mm_nocritical (stream); /* release critical */
}
stream->silent = silent; /* can pass up events now */
mail_exists (stream,nmsgs); /* notify upper level of mailbox size */
mail_recent (stream,recent);
return T; /* return that we are alive */
}
/* MH mail check mailbox
* Accepts: MAIL stream
*/
void mh_check (MAILSTREAM *stream)
{
/* Perhaps in the future this will preserve flags */
if (mh_ping (stream)) mm_log ("Check completed",(long) NIL);
}
/* MH mail expunge mailbox
* Accepts: MAIL stream
* sequence to expunge if non-NIL
* expunge options
* Returns: T, always
*/
long mh_expunge (MAILSTREAM *stream,char *sequence,long options)
{
long ret;
MESSAGECACHE *elt;
unsigned long i = 1;
unsigned long n = 0;
unsigned long recent = stream->recent;
if (ret = sequence ? ((options & EX_UID) ?
mail_uid_sequence (stream,sequence) :
mail_sequence (stream,sequence)) : LONGT) {
mm_critical (stream); /* go critical */
while (i <= stream->nmsgs) {/* for each message */
elt = mail_elt (stream,i);/* if deleted, need to trash it */
if (elt->deleted && (sequence ? elt->sequence : T)) {
sprintf (LOCAL->buf,"%s/%lu",LOCAL->dir,elt->private.uid);
if (unlink (LOCAL->buf)) {/* try to delete the message */
sprintf (LOCAL->buf,"Expunge of message %lu failed, aborted: %s",i,
strerror (errno));
mm_log (LOCAL->buf,(long) NIL);
break;
}
/* note uncached */
LOCAL->cachedtexts -= ((elt->private.msg.header.text.data ?
elt->private.msg.header.text.size : 0) +
(elt->private.msg.text.text.data ?
elt->private.msg.text.text.size : 0));
mail_gc_msg (&elt->private.msg,GC_ENV | GC_TEXTS);
/* if recent, note one less recent message */
if (elt->recent) --recent;
/* notify upper levels */
mail_expunged (stream,i);
n++; /* count up one more expunged message */
}
else i++; /* otherwise try next message */
}
if (n) { /* output the news if any expunged */
sprintf (LOCAL->buf,"Expunged %lu messages",n);
mm_log (LOCAL->buf,(long) NIL);
}
else mm_log ("No messages deleted, so no update needed",(long) NIL);
mm_nocritical (stream); /* release critical */
/* notify upper level of new mailbox size */
mail_exists (stream,stream->nmsgs);
mail_recent (stream,recent);
}
return ret;
}
/* MH mail copy message(s)
* Accepts: MAIL stream
* sequence
* destination mailbox
* copy options
* Returns: T if copy successful, else NIL
*/
long mh_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options)
{
FDDATA d;
STRING st;
MESSAGECACHE *elt;
struct stat sbuf;
int fd;
unsigned long i;
char flags[MAILTMPLEN],date[MAILTMPLEN];
appenduid_t au = (appenduid_t) mail_parameters (NIL,GET_APPENDUID,NIL);
long ret = NIL;
/* copy the messages */
if ((options & CP_UID) ? mail_uid_sequence (stream,sequence) :
mail_sequence (stream,sequence))
for (i = 1; i <= stream->nmsgs; i++)
if ((elt = mail_elt (stream,i))->sequence) {
sprintf (LOCAL->buf,"%s/%lu",LOCAL->dir,elt->private.uid);
if ((fd = open (LOCAL->buf,O_RDONLY,NIL)) < 0) return NIL;
fstat (fd,&sbuf); /* get size of message */
if (!elt->day) { /* set internaldate to file date if needed */
struct tm *tm = gmtime (&sbuf.st_mtime);
elt->day = tm->tm_mday; elt->month = tm->tm_mon + 1;
elt->year = tm->tm_year + 1900 - BASEYEAR;
elt->hours = tm->tm_hour; elt->minutes = tm->tm_min;
elt->seconds = tm->tm_sec;
elt->zhours = 0; elt->zminutes = 0;
}
d.fd = fd; /* set up file descriptor */
d.pos = 0; /* start of file */
d.chunk = LOCAL->buf;
d.chunksize = CHUNKSIZE;
/* kludge; mh_append would just strip CRs */
INIT (&st,fd_string,&d,sbuf.st_size);
/* init flag string */
flags[0] = flags[1] = '\0';
if (elt->seen) strcat (flags," \\Seen");
if (elt->deleted) strcat (flags," \\Deleted");
if (elt->flagged) strcat (flags," \\Flagged");
if (elt->answered) strcat (flags," \\Answered");
if (elt->draft) strcat (flags," \\Draft");
flags[0] = '('; /* open list */
strcat (flags,")"); /* close list */
mail_date (date,elt); /* generate internal date */
if (au) mail_parameters (NIL,SET_APPENDUID,NIL);
if ((ret = mail_append_full (NIL,mailbox,flags,date,&st)) &&
(options & CP_MOVE)) elt->deleted = T;
if (au) mail_parameters (NIL,SET_APPENDUID,(void *) au);
close (fd);
}
if (ret && mail_parameters (NIL,GET_COPYUID,NIL))
mm_log ("Can not return meaningful COPYUID with this mailbox format",WARN);
return ret; /* return success */
}
/* MH mail append message from stringstruct
* Accepts: MAIL stream
* destination mailbox
* append callback
* data for callback
* Returns: T if append successful, else NIL
*/
long mh_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data)
{
struct direct **names = NIL;
int fd;
char c,*flags,*date,*s,tmp[MAILTMPLEN];
STRING *message;
MESSAGECACHE elt;
FILE *df;
long i,size,last,nfiles;
long ret = LONGT;
/* default stream to prototype */
if (!stream) stream = &mhproto;
/* make sure valid mailbox */
if (!mh_isvalid (mailbox,tmp,NIL)) switch (errno) {
case ENOENT: /* no such file? */
if (!((!compare_cstring (mailbox,MHINBOX) ||
!compare_cstring (mailbox,"INBOX")) &&
(mh_file (tmp,MHINBOX) &&
dummy_create_path (stream,strcat (tmp,"/"),
get_dir_protection (mailbox))))) {
mm_notify (stream,"[TRYCREATE] Must create mailbox before append",NIL);
return NIL;
}
/* falls through */
case 0: /* merely empty file? */
break;
case EINVAL:
sprintf (tmp,"Invalid MH-format mailbox name: %.80s",mailbox);
mm_log (tmp,ERROR);
return NIL;
default:
sprintf (tmp,"Not a MH-format mailbox: %.80s",mailbox);
mm_log (tmp,ERROR);
return NIL;
}
/* get first message */
if (!(*af) (stream,data,&flags,&date,&message)) return NIL;
if ((nfiles = scandir (tmp,&names,mh_select,mh_numsort)) > 0) {
/* largest number */
last = atoi (names[nfiles-1]->d_name);
for (i = 0; i < nfiles; ++i) /* free directory */
fs_give ((void **) &names[i]);
}
else last = 0; /* no messages here yet */
if (s = (void *) names) fs_give ((void **) &s);
mm_critical (stream); /* go critical */
do {
if (!SIZE (message)) { /* guard against zero-length */
mm_log ("Append of zero-length message",ERROR);
ret = NIL;
break;
}
if (date) { /* want to preserve date? */
/* yes, parse date into an elt */
if (!mail_parse_date (&elt,date)) {
sprintf (tmp,"Bad date in append: %.80s",date);
mm_log (tmp,ERROR);
ret = NIL;
break;
}
}
mh_file (tmp,mailbox); /* build file name we will use */
sprintf (tmp + strlen (tmp),"/%ld",++last);
if (((fd = open (tmp,O_WRONLY|O_CREAT|O_EXCL,
(long)mail_parameters (NIL,GET_MBXPROTECTION,NIL))) < 0)||
!(df = fdopen (fd,"ab"))) {
sprintf (tmp,"Can't open append message: %s",strerror (errno));
mm_log (tmp,ERROR);
ret = NIL;
break;
}
/* copy the data w/o CR's */
for (size = 0,i = SIZE (message); i && ret; --i)
if (((c = SNX (message)) != '\015') && (putc (c,df) == EOF)) ret = NIL;
/* close the file */
if (!ret || fclose (df)) {
unlink (tmp); /* delete message */
sprintf (tmp,"Message append failed: %s",strerror (errno));
mm_log (tmp,ERROR);
ret = NIL;
}
if (ret) { /* set the date for this message */
if (date) mh_setdate (tmp,&elt);
/* get next message */
if (!(*af) (stream,data,&flags,&date,&message)) ret = NIL;
}
} while (ret && message);
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 */
/* MH file name selection test
* Accepts: candidate directory entry
* Returns: T to use file name, NIL to skip it
*/
int mh_select (struct direct *name)
{
char c;
char *s = name->d_name;
while (c = *s++) if (!isdigit (c)) return NIL;
return T;
}
/* MH file name comparision
* Accepts: first candidate directory entry
* second candidate directory entry
* Returns: negative if d1 < d2, 0 if d1 == d2, postive if d1 > d2
*/
int mh_numsort (const void *d1,const void *d2)
{
return atoi ((*(struct direct **) d1)->d_name) -
atoi ((*(struct direct **) d2)->d_name);
}
/* MH mail build file name
* Accepts: destination string
* source
* Returns: destination
*/
char *mh_file (char *dst,char *name)
{
char *s;
char *path = mh_path (dst);
if (!path) fatal ("No mh path in mh_file()!");
/* INBOX becomes "inbox" in the MH path */
if (!compare_cstring (name,MHINBOX) || !compare_cstring (name,"INBOX"))
sprintf (dst,"%.900s/%.80s",path,MHINBOXDIR);
/* #mh names skip past prefix */
else if (*name == '#') sprintf (dst,"%.100s/%.900s",path,name + 4);
else mailboxfile (dst,name); /* all other names */
/* tie off unnecessary trailing / */
if ((s = strrchr (dst,'/')) && !s[1] && (s[-1] == '/')) *s = '\0';
return dst;
}
/* MH canonicalize name
* Accepts: buffer to write name
* reference
* pattern
* Returns: T if success, NIL if failure
*/
long mh_canonicalize (char *pattern,char *ref,char *pat)
{
unsigned long i;
char *s,tmp[MAILTMPLEN];
if (ref && *ref) { /* have a reference */
strcpy (pattern,ref); /* copy reference to pattern */
/* # overrides mailbox field in reference */
if (*pat == '#') strcpy (pattern,pat);
/* pattern starts, reference ends, with / */
else if ((*pat == '/') && (pattern[strlen (pattern) - 1] == '/'))
strcat (pattern,pat + 1); /* append, omitting one of the period */
else strcat (pattern,pat); /* anything else is just appended */
}
else strcpy (pattern,pat); /* just have basic name */
if (mh_isvalid (pattern,tmp,T)) {
/* count wildcards */
for (i = 0, s = pattern; *s; *s++) if ((*s == '*') || (*s == '%')) ++i;
/* success if not too many */
if (i <= MAXWILDCARDS) return LONGT;
mm_log ("Excessive wildcards in LIST/LSUB",ERROR);
}
return NIL;
}
/* Set date for message
* Accepts: file name
* elt containing date
*/
void mh_setdate (char *file,MESSAGECACHE *elt)
{
time_t tp[2];
tp[0] = time (0); /* atime is now */
tp[1] = mail_longdate (elt); /* modification time */
utime (file,tp); /* set the times */
}
|