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/* ========================================================================
* 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: Dummy routines for DOS
*
* 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 May 1993
* Last Edited: 30 August 2006
*/
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include "mail.h"
#include "osdep.h"
#include <sys\stat.h>
#include <dos.h>
#include "dummy.h"
#include "misc.h"
/* Function prototypes */
DRIVER *dummy_valid (char *name);
void *dummy_parameters (long function,void *value);
void dummy_list_work (MAILSTREAM *stream,char *dir,char *pat,char *contents,
long level);
long dummy_listed (MAILSTREAM *stream,char delimiter,char *name,
long attributes,char *contents);
long dummy_subscribe (MAILSTREAM *stream,char *mailbox);
MAILSTREAM *dummy_open (MAILSTREAM *stream);
void dummy_close (MAILSTREAM *stream,long options);
long dummy_ping (MAILSTREAM *stream);
void dummy_check (MAILSTREAM *stream);
long dummy_expunge (MAILSTREAM *stream,char *sequence,long options);
long dummy_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options);
long dummy_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data);
long dummy_badname (char *tmp,char *s);
/* Dummy routines */
/* Driver dispatch used by MAIL */
DRIVER dummydriver = {
"dummy", /* driver name */
DR_LOCAL|DR_MAIL, /* driver flags */
(DRIVER *) NIL, /* next driver */
dummy_valid, /* mailbox is valid for us */
dummy_parameters, /* manipulate parameters */
dummy_scan, /* scan mailboxes */
dummy_list, /* list mailboxes */
dummy_lsub, /* list subscribed mailboxes */
dummy_subscribe, /* subscribe to mailbox */
NIL, /* unsubscribe from mailbox */
dummy_create, /* create mailbox */
dummy_delete, /* delete mailbox */
dummy_rename, /* rename mailbox */
mail_status_default, /* status of mailbox */
dummy_open, /* open mailbox */
dummy_close, /* close mailbox */
NIL, /* fetch message "fast" attributes */
NIL, /* fetch message flags */
NIL, /* fetch overview */
NIL, /* fetch message structure */
NIL, /* fetch header */
NIL, /* fetch text */
NIL, /* fetch message data */
NIL, /* unique identifier */
NIL, /* message number from UID */
NIL, /* modify flags */
NIL, /* per-message modify flags */
NIL, /* search for message based on criteria */
NIL, /* sort messages */
NIL, /* thread messages */
dummy_ping, /* ping mailbox to see if still alive */
dummy_check, /* check for new messages */
dummy_expunge, /* expunge deleted messages */
dummy_copy, /* copy messages to another mailbox */
dummy_append, /* append string message to mailbox */
NIL /* garbage collect stream */
};
/* prototype stream */
MAILSTREAM dummyproto = {&dummydriver};
/* driver parameters */
static char *file_extension = NIL;
/* Dummy validate mailbox
* Accepts: mailbox name
* Returns: our driver if name is valid, NIL otherwise
*/
DRIVER *dummy_valid (char *name)
{
char *s,tmp[MAILTMPLEN];
struct stat sbuf;
/* must be valid local mailbox */
return (name && *name && (*name != '{') &&
(s = mailboxfile (tmp,name)) && (!*s || !stat (s,&sbuf))) ?
&dummydriver : NIL;
}
/* Dummy manipulate driver parameters
* Accepts: function code
* function-dependent value
* Returns: function-dependent return value
*/
void *dummy_parameters (long function,void *value)
{
void *ret = NIL;
switch ((int) function) {
case SET_EXTENSION:
if (file_extension) fs_give ((void **) &file_extension);
if (*(char *) value) file_extension = cpystr ((char *) value);
case GET_EXTENSION:
ret = (void *) file_extension;
}
return ret;
}
/* Dummy scan mailboxes
* Accepts: mail stream
* reference
* pattern to search
* string to scan
*/
#define LISTTMPLEN 128
void dummy_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents)
{
char *s,test[LISTTMPLEN],file[LISTTMPLEN];
long i = 0;
if (!pat || !*pat) { /* empty pattern? */
if (dummy_canonicalize (test,ref,"*")) {
/* tie off name at root */
if (s = strchr (test,'\\')) *++s = '\0';
else test[0] = '\0';
dummy_listed (stream,'\\',test,LATT_NOINFERIORS,NIL);
}
}
/* get canonical form of name */
else if (dummy_canonicalize (test,ref,pat)) {
/* found any wildcards? */
if (s = strpbrk (test,"%*")) {
/* yes, copy name up to that point */
strncpy (file,test,(size_t) (i = s - test));
file[i] = '\0'; /* tie off */
}
else strcpy (file,test); /* use just that name then */
/* find directory name */
if (s = strrchr (file,'\\')) {
*++s = '\0'; /* found, tie off at that point */
s = file;
}
/* silly case */
else if (file[0] == '#') s = file;
/* do the work */
dummy_list_work (stream,s,test,contents,0);
if (pmatch ("INBOX",test)) /* always an INBOX */
dummy_listed (stream,NIL,"INBOX",LATT_NOINFERIORS,contents);
}
}
/* Dummy list mailboxes
* Accepts: mail stream
* reference
* pattern to search
*/
void dummy_list (MAILSTREAM *stream,char *ref,char *pat)
{
dummy_scan (stream,ref,pat,NIL);
}
/* Dummy list subscribed mailboxes
* Accepts: mail stream
* pattern to search
*/
void dummy_lsub (MAILSTREAM *stream,char *ref,char *pat)
{
void *sdb = NIL;
char *s,*t,test[MAILTMPLEN];
int showuppers = pat[strlen (pat) - 1] == '%';
/* get canonical form of name */
if (dummy_canonicalize (test,ref,pat) && (s = sm_read (&sdb))) do
if (*s != '{') {
if (pmatch_full (s,test,'\\')) {
if (pmatch (s,"INBOX")) mm_lsub (stream,NIL,s,LATT_NOINFERIORS);
else mm_lsub (stream,'\\',s,NIL);
}
else while (showuppers && (t = strrchr (s,'\\'))) {
*t = '\0'; /* tie off the name */
if (pmatch_full (s,test,'\\')) mm_lsub (stream,'\\',s,LATT_NOSELECT);
}
}
while (s = sm_read (&sdb)); /* until no more subscriptions */
}
/* Dummy subscribe to mailbox
* Accepts: mail stream
* mailbox to add to subscription list
* Returns: T on success, NIL on failure
*/
long dummy_subscribe (MAILSTREAM *stream,char *mailbox)
{
char *s,tmp[MAILTMPLEN];
struct stat sbuf;
/* must be valid local mailbox */
if ((s = mailboxfile (tmp,mailbox)) && *s && !stat (s,&sbuf) &&
((sbuf.st_mode & S_IFMT) == S_IFREG)) return sm_subscribe (mailbox);
sprintf (tmp,"Can't subscribe %s: not a mailbox",mailbox);
mm_log (tmp,ERROR);
return NIL;
}
/* Dummy list mailboxes worker routine
* Accepts: mail stream
* directory name to search
* search pattern
* string to scan
* search level
*/
void dummy_list_work (MAILSTREAM *stream,char *dir,char *pat,char *contents,
long level)
{
struct find_t f;
struct stat sbuf;
char *s,tmp[LISTTMPLEN],tmpx[LISTTMPLEN];
char *base = (dir && (dir[0] == '\\')) ? NIL : myhomedir ();
/* build name */
if (base) sprintf (tmpx,"%s\\",base);
else tmpx[0] = '\0';
if (dir) strcat (tmpx,dir);
/* punt if bogus name */
if (!mailboxfile (tmp,tmpx)) return;
/* make directory wildcard */
strcat (tmp,(tmp[strlen (tmp) -1] == '\\') ? "*." : "\\*.");
strcat (tmp,file_extension ? file_extension : "*");
/* do nothing if can't open directory */
if (!_dos_findfirst (tmp,_A_NORMAL|_A_SUBDIR,&f)) {
/* list it if at top-level */
if (!level && dir && pmatch_full (dir,pat,'\\'))
dummy_listed (stream,'\\',dir,LATT_NOSELECT,contents);
/* scan directory */
if (tmpx[strlen (tmpx) - 1] == '\\') do if (*f.name != '.') {
if (base) sprintf (tmpx,"%s\\",base);
else tmpx[0] = '\0';
if (dir) sprintf (tmpx + strlen (tmpx),"%s%s",dir,f.name);
else strcat (tmpx,f.name);
if (mailboxfile (tmp,tmpx) && !stat (tmp,&sbuf)) {
/* suppress extension */
if (file_extension && (s = strchr (f.name,'.'))) *s = '\0';
/* now make name we'd return */
if (dir) sprintf (tmp,"%s%s",dir,f.name);
else strcpy (tmp,f.name);
/* only interested in file type */
switch (sbuf.st_mode & S_IFMT) {
case S_IFDIR: /* directory? */
if (pmatch_full (tmp,pat,'\\')) {
dummy_listed (stream,'\\',tmp,LATT_NOSELECT,contents);
strcat (tmp,"\\"); /* set up for dmatch call */
}
/* try again with trailing / */
else if (pmatch_full (strcat (tmp,"\\"),pat,'\\'))
dummy_listed (stream,'\\',tmp,LATT_NOSELECT,contents);
if (dmatch (tmp,pat,'\\') &&
(level < (long) mail_parameters (NIL,GET_LISTMAXLEVEL,NIL)))
dummy_list_work (stream,tmp,pat,contents,level+1);
break;
case S_IFREG: /* ordinary name */
if (pmatch_full (tmp,pat,'\\') && !pmatch ("INBOX",tmp))
dummy_listed (stream,'\\',tmp,LATT_NOINFERIORS,contents);
break;
}
}
}
while (!_dos_findnext (&f));
}
}
/* Mailbox found
* Accepts: hierarchy delimiter
* mailbox name
* attributes
* contents to search before calling mm_list()
* Returns: T, always
*/
#define BUFSIZE MAILTMPLEN
long dummy_listed (MAILSTREAM *stream,char delimiter,char *name,
long attributes,char *contents)
{
struct stat sbuf;
int fd;
size_t csiz,ssiz,bsiz;
char *buf,tmp[MAILTMPLEN];
if (contents) { /* want to search contents? */
/* forget it if can't select or open */
if ((attributes & LATT_NOSELECT) || !(csiz = strlen (contents)) ||
!mailboxfile (tmp,name) || stat (tmp,&sbuf) || (csiz > sbuf.st_size) ||
((fd = open (tmp,O_RDONLY,NIL)) < 0)) return T;
/* get buffer including slop */
buf = (char *) fs_get (BUFSIZE + (ssiz = 4 * ((csiz / 4) + 1)) + 1);
memset (buf,'\0',ssiz); /* no slop area the first time */
while (sbuf.st_size) { /* until end of file */
read (fd,buf+ssiz,bsiz = min (sbuf.st_size,BUFSIZE));
if (search ((unsigned char *) buf,bsiz+ssiz,
(unsigned char *) contents,csiz)) break;
memcpy (buf,buf+BUFSIZE,ssiz);
sbuf.st_size -= bsiz; /* note that we read that much */
}
fs_give ((void **) &buf); /* flush buffer */
close (fd); /* finished with file */
if (!sbuf.st_size) return T;/* not found */
}
/* notify main program */
mm_list (stream,delimiter,name,attributes);
return T;
}
/* Dummy create mailbox
* Accepts: mail stream
* mailbox name to create
* Returns: T on success, NIL on failure
*/
long dummy_create (MAILSTREAM *stream,char *mailbox)
{
char tmp[MAILTMPLEN];
return (compare_cstring (mailbox,"INBOX") && mailboxfile (tmp,mailbox)) ?
dummy_create_path (stream,tmp,NIL) : dummy_badname (tmp,mailbox);
}
/* Dummy create path
* Accepts: mail stream
* path name to create
* directory mode
* Returns: T on success, NIL on failure
*/
long dummy_create_path (MAILSTREAM *stream,char *path,long dirmode)
{
struct stat sbuf;
char c,*s,tmp[MAILTMPLEN];
int fd;
long ret = NIL;
char *t = strrchr (path,'\\');
char *pt = (path[1] == ':') ? path + 2 : path;
int wantdir = t && !t[1];
if (wantdir) *t = '\0'; /* flush trailing delimiter for directory */
/* found superior to this name? */
if ((s = strrchr (pt,'\\')) && (s != pt)) {
strncpy (tmp,path,(size_t) (s - path));
tmp[s - path] = '\0'; /* make directory name for stat */
c = *++s; /* tie off in case need to recurse */
*s = '\0';
/* name doesn't exist, create it */
if ((stat (tmp,&sbuf) || ((sbuf.st_mode & S_IFMT) != S_IFDIR)) &&
!dummy_create_path (stream,path,dirmode)) return NIL;
*s = c; /* restore full name */
}
if (wantdir) { /* want to create directory? */
ret = !mkdir (path);
*t = '\\'; /* restore directory delimiter */
}
/* create file */
else if ((fd = open (path,O_WRONLY|O_CREAT|O_EXCL,S_IREAD|S_IWRITE)) >= 0)
ret = !close (fd); /* close file */
if (!ret) { /* error? */
sprintf (tmp,"Can't create mailbox node %s: %s",path,strerror (errno));
mm_log (tmp,ERROR);
}
return ret; /* return status */
}
/* Dummy delete mailbox
* Accepts: mail stream
* mailbox name to delete
* Returns: T on success, NIL on failure
*/
long dummy_delete (MAILSTREAM *stream,char *mailbox)
{
struct stat sbuf;
char *s,tmp[MAILTMPLEN];
if (!mailboxfile (tmp,mailbox)) return dummy_badname (tmp,mailbox);
/* no trailing \ */
if ((s = strrchr (tmp,'\\')) && !s[1]) *s = '\0';
if (stat (tmp,&sbuf) || ((sbuf.st_mode & S_IFMT) == S_IFDIR) ?
rmdir (tmp) : unlink (tmp)) {
sprintf (tmp,"Can't delete mailbox %s: %s",mailbox,strerror (errno));
mm_log (tmp,ERROR);
return NIL;
}
return T; /* return success */
}
/* Mail rename mailbox
* Accepts: mail stream
* old mailbox name
* new mailbox name
* Returns: T on success, NIL on failure
*/
long dummy_rename (MAILSTREAM *stream,char *old,char *newname)
{
struct stat sbuf;
char c,*s,tmp[MAILTMPLEN],file[MAILTMPLEN];
/* make file name */
if (!mailboxfile (file,old)) return dummy_badname (tmp,old);
/* no trailing \ allowed */
if (!(s = mailboxfile (tmp,newname)) || ((s = strrchr (s,'\\')) && !s[1]))
return dummy_badname (tmp,newname);
if (s) { /* found superior to destination name? */
c = *++s; /* remember first character of inferior */
*s = '\0'; /* tie off to get just superior */
/* name doesn't exist, create it */
if ((stat (file,&sbuf) || ((sbuf.st_mode & S_IFMT) != S_IFDIR)) &&
!dummy_create (stream,file)) return NIL;
*s = c; /* restore full name */
}
if (rename (file,tmp)) {
sprintf (tmp,"Can't rename mailbox %s to %s: %s",old,newname,
strerror (errno));
mm_log (tmp,ERROR);
return NIL;
}
return LONGT; /* return success */
}
/* Dummy open
* Accepts: stream to open
* Returns: stream on success, NIL on failure
*/
MAILSTREAM *dummy_open (MAILSTREAM *stream)
{
char tmp[MAILTMPLEN];
struct stat sbuf;
int fd = -1;
/* OP_PROTOTYPE call or silence */
if (!stream || stream->silent) return NIL;
if (!mailboxfile (tmp,stream->mailbox))
sprintf (tmp,"Can't open this name: %.80s",stream->mailbox);
else if (compare_cstring (stream->mailbox,"INBOX") &&
((fd = open (tmp,O_RDONLY,NIL)) < 0))
sprintf (tmp,"%s: %s",strerror (errno),stream->mailbox);
else {
if (fd >= 0) { /* if got a file */
fstat (fd,&sbuf); /* sniff at its size */
close (fd);
if (sbuf.st_size) sprintf (tmp,"Not a mailbox: %s",stream->mailbox);
else fd = -1; /* a-OK */
}
if (fd < 0) { /* no file, right? */
if (!stream->silent) { /* only if silence not requested */
/* say there are 0 messages */
mail_exists (stream,(long) 0);
mail_recent (stream,(long) 0);
stream->uid_validity = time (0);
}
stream->inbox = T; /* note that it's an INBOX */
return stream; /* return success */
}
}
mm_log (tmp,stream->silent ? WARN: ERROR);
return NIL; /* always fails */
}
/* Dummy close
* Accepts: MAIL stream
* options
*/
void dummy_close (MAILSTREAM *stream,long options)
{
/* return silently */
}
/* Dummy ping mailbox
* Accepts: MAIL stream
* Returns: T if stream alive, else NIL
* No-op for readonly files, since read/writer can expunge it from under us!
*/
long dummy_ping (MAILSTREAM *stream)
{
MAILSTREAM *test;
/* time to do another test? */
if (time (0) >= ((time_t) (stream->gensym + 30))) {
/* has mailbox format changed? */
if ((test = mail_open (NIL,stream->mailbox,OP_PROTOTYPE)) &&
(test->dtb != stream->dtb) &&
(test = mail_open (NIL,stream->mailbox,NIL))) {
/* preserve some resources */
test->original_mailbox = stream->original_mailbox;
stream->original_mailbox = NIL;
test->sparep = stream->sparep;
stream->sparep = NIL;
test->sequence = stream->sequence;
mail_close ((MAILSTREAM *) /* flush resources used by dummy stream */
memcpy (fs_get (sizeof (MAILSTREAM)),stream,
sizeof (MAILSTREAM)));
/* swap the streams */
memcpy (stream,test,sizeof (MAILSTREAM));
fs_give ((void **) &test);/* flush test now that copied */
/* make sure application knows */
mail_exists (stream,stream->recent = stream->nmsgs);
}
/* still hasn't changed */
else stream->gensym = time (0);
}
return T;
}
/* Dummy check mailbox
* Accepts: MAIL stream
* No-op for readonly files, since read/writer can expunge it from under us!
*/
void dummy_check (MAILSTREAM *stream)
{
dummy_ping (stream); /* invoke ping */
}
/* Dummy expunge mailbox
* Accepts: MAIL stream
* sequence to expunge if non-NIL
* expunge options
* Returns: T, always
*/
long dummy_expunge (MAILSTREAM *stream,char *sequence,long options)
{
return LONGT;
}
/* Dummy copy message(s)
* Accepts: MAIL stream
* sequence
* destination mailbox
* options
* Returns: T if copy successful, else NIL
*/
long dummy_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options)
{
if ((options & CP_UID) ? mail_uid_sequence (stream,sequence) :
mail_sequence (stream,sequence)) fatal ("Impossible dummy_copy");
return NIL;
}
/* Dummy append message string
* Accepts: mail stream
* destination mailbox
* append callback function
* data for callback
* Returns: T on success, NIL on failure
*/
long dummy_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data)
{
struct stat sbuf;
int fd = -1;
int e;
char tmp[MAILTMPLEN];
MAILSTREAM *ts = default_proto (T);
if (compare_cstring (mailbox,"INBOX") && mailboxfile (tmp,mailbox) &&
((fd = open (tmp,O_RDONLY,NIL)) < 0)) {
if ((e = errno) == ENOENT) /* failed, was it no such file? */
mm_notify (stream,"[TRYCREATE] Must create mailbox before append",
(long) NIL);
sprintf (tmp,"%s: %s",strerror (e),mailbox);
mm_log (tmp,ERROR); /* pass up error */
return NIL; /* always fails */
}
if (fd >= 0) { /* found file? */
fstat (fd,&sbuf); /* get its size */
close (fd); /* toss out the fd */
if (sbuf.st_size) ts = NIL; /* non-empty file? */
}
if (ts) return (*ts->dtb->append) (stream,mailbox,af,data);
sprintf (tmp,"Indeterminate mailbox format: %s",mailbox);
mm_log (tmp,ERROR);
return NIL;
}
/* Return bad file name error message
* Accepts: temporary buffer
* file name
* Returns: long NIL always
*/
long dummy_badname (char *tmp,char *s)
{
sprintf (tmp,"Invalid mailbox name: %s",s);
mm_log (tmp,ERROR);
return (long) NIL;
}
/* Dummy canonicalize name
* Accepts: buffer to write name
* reference
* pattern
* Returns: T if success, NIL if failure
*/
long dummy_canonicalize (char *tmp,char *ref,char *pat)
{
unsigned long i;
char *s,dev[4];
/* initially no device */
dev[0] = dev[1] = dev[2] = dev[3] = '\0';
if (ref) switch (*ref) { /* preliminary reference check */
case '{': /* remote names not allowed */
return NIL; /* disallowed */
case '\0': /* empty reference string */
break;
default: /* all other names */
if (ref[1] == ':') { /* start with device name? */
dev[0] = *ref++; dev[1] = *ref++;
}
break;
}
if (pat[1] == ':') { /* device name in pattern? */
dev[0] = *pat++; dev[1] = *pat++;
ref = NIL; /* ignore reference */
}
switch (*pat) {
case '#': /* namespace names */
if (mailboxfile (tmp,pat)) strcpy (tmp,pat);
else return NIL; /* unknown namespace */
break;
case '{': /* remote names not allowed */
return NIL;
case '\\': /* rooted name */
ref = NIL; /* ignore reference */
break;
}
/* make sure device names are rooted */
if (dev[0] && (*(ref ? ref : pat) != '\\')) dev[2] = '\\';
/* build name */
sprintf (tmp,"%s%s%s",dev,ref ? ref : "",pat);
ucase (tmp); /* force upper case */
/* count wildcards */
for (i = 0, s = tmp; *s; *s++) if ((*s == '*') || (*s == '%')) ++i;
if (i > MAXWILDCARDS) { /* ridiculous wildcarding? */
MM_LOG ("Excessive wildcards in LIST/LSUB",ERROR);
return NIL;
}
return T;
}
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