Viewing file:  dummy.c (24.66 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: Dummy 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: 9 May 1991
* Last Edited: 1 June 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 "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);
/* 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};
/* 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 */
if (name && *name && (*name != '{') && (s = mailboxfile (tmp,name))) {
/* indeterminate clearbox INBOX */
if (!*s) return &dummydriver;
else if (!stat (s,&sbuf)) switch (sbuf.st_mode & S_IFMT) {
case S_IFREG:
case S_IFDIR:
return &dummydriver;
}
/* blackbox INBOX does not exist yet */
else if (!compare_cstring (name,"INBOX")) return &dummydriver;
}
return 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 GET_INBOXPATH:
if (value) ret = dummy_file ((char *) value,"INBOX");
break;
}
return ret;
}
/* Dummy scan mailboxes
* Accepts: mail stream
* reference
* pattern to search
* string to scan
*/
void dummy_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents)
{
DRIVER *drivers;
char *s,test[MAILTMPLEN],file[MAILTMPLEN];
long i;
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_NOSELECT,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,i = s - test);
file[i] = '\0'; /* tie off */
}
else strcpy (file,test); /* use just that name then */
if (s = strrchr (file,'/')){/* find directory name */
*++s = '\0'; /* found, tie off at that point */
s = file;
}
/* silly case */
else if ((file[0] == '~') || (file[0] == '#')) s = file;
/* do the work */
dummy_list_work (stream,s,test,contents,0);
/* always an INBOX */
if (pmatch ("INBOX",ucase (test))) {
/* done if have a dirfmt INBOX */
for (drivers = (DRIVER *) mail_parameters (NIL,GET_DRIVERS,NIL);
drivers && !(!(drivers->flags & DR_DISABLE) &&
(drivers->flags & DR_DIRFMT) &&
(*drivers->valid) ("INBOX")); drivers = drivers->next);
/* list INBOX appropriately */
dummy_listed (stream,drivers ? '/' : NIL,"INBOX",
drivers ? NIL : 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
* reference
* pattern to search
*/
void dummy_lsub (MAILSTREAM *stream,char *ref,char *pat)
{
void *sdb = NIL;
char *s,*t,test[MAILTMPLEN],tmp[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 (!compare_cstring (s,"INBOX") &&
pmatch ("INBOX",ucase (strcpy (tmp,test))))
mm_lsub (stream,NIL,s,LATT_NOINFERIORS);
else if (pmatch_full (s,test,'/')) 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))
switch (sbuf.st_mode & S_IFMT) {
case S_IFDIR: /* allow but snarl */
sprintf (tmp,"CLIENT BUG DETECTED: subscribe of non-mailbox directory %.80s",
mailbox);
MM_NOTIFY (stream,tmp,WARN);
case S_IFREG:
return sm_subscribe (mailbox);
}
sprintf (tmp,"Can't subscribe %.80s: 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)
{
DRIVER *drivers;
dirfmttest_t dt;
DIR *dp;
struct direct *d;
struct stat sbuf;
char tmp[MAILTMPLEN],path[MAILTMPLEN];
size_t len = 0;
/* punt if bogus name */
if (!mailboxdir (tmp,dir,NIL)) return;
if (dp = opendir (tmp)) { /* do nothing if can't open directory */
/* see if a non-namespace directory format */
for (drivers = (DRIVER *) mail_parameters (NIL,GET_DRIVERS,NIL), dt = NIL;
dir && !dt && drivers; drivers = drivers->next)
if (!(drivers->flags & DR_DISABLE) && (drivers->flags & DR_DIRFMT) &&
(*drivers->valid) (dir))
dt = mail_parameters ((*drivers->open) (NIL),GET_DIRFMTTEST,NIL);
/* list it if at top-level */
if (!level && dir && pmatch_full (dir,pat,'/') && !pmatch (dir,"INBOX"))
dummy_listed (stream,'/',dir,dt ? NIL : LATT_NOSELECT,contents);
/* scan directory, ignore . and .. */
if (!dir || dir[(len = strlen (dir)) - 1] == '/') while (d = readdir (dp))
if ((!(dt && (*dt) (d->d_name))) &&
((d->d_name[0] != '.') ||
(((long) mail_parameters (NIL,GET_HIDEDOTFILES,NIL)) ? NIL :
(d->d_name[1] && (((d->d_name[1] != '.') || d->d_name[2]))))) &&
((len + strlen (d->d_name)) <= NETMAXMBX)) {
/* see if name is useful */
if (dir) sprintf (tmp,"%s%s",dir,d->d_name);
else strcpy (tmp,d->d_name);
/* make sure useful and can get info */
if ((pmatch_full (strcpy (path,tmp),pat,'/') ||
pmatch_full (strcat (path,"/"),pat,'/') ||
dmatch (path,pat,'/')) &&
mailboxdir (path,dir,"x") && (len = strlen (path)) &&
strcpy (path+len-1,d->d_name) && !stat (path,&sbuf)) {
/* only interested in file type */
switch (sbuf.st_mode & S_IFMT) {
case S_IFDIR: /* directory? */
/* form with trailing / */
sprintf (path,"%s/",tmp);
/* skip listing if INBOX */
if (!pmatch (tmp,"INBOX")) {
if (pmatch_full (tmp,pat,'/')) {
if (!dummy_listed (stream,'/',tmp,LATT_NOSELECT,contents))
break;
}
/* try again with trailing / */
else if (pmatch_full (path,pat,'/') &&
!dummy_listed (stream,'/',path,LATT_NOSELECT,contents))
break;
}
if (dmatch (path,pat,'/') &&
(level < (long) mail_parameters (NIL,GET_LISTMAXLEVEL,NIL)))
dummy_list_work (stream,path,pat,contents,level+1);
break;
case S_IFREG: /* ordinary name */
/* Must use ctime for systems that don't update mtime properly */
if (pmatch_full (tmp,pat,'/') && compare_cstring (tmp,"INBOX"))
dummy_listed (stream,'/',tmp,LATT_NOINFERIORS +
((sbuf.st_size && (sbuf.st_atime < sbuf.st_ctime))?
LATT_MARKED : LATT_UNMARKED),contents);
break;
}
}
}
closedir (dp); /* all done, flush directory */
}
}
/* Scan file for contents
* Accepts: driver to use
* file name
* desired contents
* length of contents
* size of file
* Returns: NIL if contents not found, T if found
*/
long scan_contents (DRIVER *dtb,char *name,char *contents,
unsigned long csiz,unsigned long fsiz)
{
scancontents_t sc = dtb ?
(scancontents_t) (*dtb->parameters) (GET_SCANCONTENTS,NIL) : NIL;
return (*(sc ? sc : dummy_scan_contents)) (name,contents,csiz,fsiz);
}
/* Scan file for contents
* Accepts: file name
* desired contents
* length of contents
* size of file
* Returns: NIL if contents not found, T if found
*/
#define BUFSIZE 4*MAILTMPLEN
long dummy_scan_contents (char *name,char *contents,unsigned long csiz,
unsigned long fsiz)
{
int fd;
unsigned long ssiz,bsiz;
char *buf;
/* forget it if can't select or open */
if ((fd = open (name,O_RDONLY,NIL)) >= 0) {
/* 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 (fsiz) { /* until end of file */
read (fd,buf+ssiz,bsiz = min (fsiz,BUFSIZE));
if (search ((unsigned char *) buf,bsiz+ssiz,
(unsigned char *) contents,csiz)) break;
memcpy (buf,buf+BUFSIZE,ssiz);
fsiz -= bsiz; /* note that we read that much */
}
fs_give ((void **) &buf); /* flush buffer */
close (fd); /* finished with file */
if (fsiz) return T; /* found */
}
return NIL; /* not found */
}
/* Mailbox found
* Accepts: MAIL stream
* hierarchy delimiter
* mailbox name
* attributes
* contents to search before calling mm_list()
* Returns: NIL if should abort hierarchy search, else T (currently always)
*/
long dummy_listed (MAILSTREAM *stream,char delimiter,char *name,
long attributes,char *contents)
{
DRIVER *d;
DIR *dp;
struct direct *dr;
dirfmttest_t dt;
unsigned long csiz;
struct stat sbuf;
int nochild;
char *s,tmp[MAILTMPLEN];
if (!(attributes & LATT_NOINFERIORS) && mailboxdir (tmp,name,NIL) &&
(dp = opendir (tmp))) { /* if not \NoInferiors */
/* locate dirfmttest if any */
for (d = (DRIVER *) mail_parameters (NIL,GET_DRIVERS,NIL), dt = NIL;
!dt && d; d = d->next)
if (!(d->flags & DR_DISABLE) && (d->flags & DR_DIRFMT) &&
(*d->valid) (name))
dt = mail_parameters ((*d->open) (NIL),GET_DIRFMTTEST,NIL);
/* scan directory for children */
for (nochild = T; nochild && (dr = readdir (dp)); )
if ((!(dt && (*dt) (dr->d_name))) &&
((dr->d_name[0] != '.') ||
(((long) mail_parameters (NIL,GET_HIDEDOTFILES,NIL)) ? NIL :
(dr->d_name[1] && ((dr->d_name[1] != '.') || dr->d_name[2])))))
nochild = NIL;
attributes |= nochild ? LATT_HASNOCHILDREN : LATT_HASCHILDREN;
closedir (dp); /* all done, flush directory */
}
d = NIL; /* don't \NoSelect dir if it has a driver */
if ((attributes & LATT_NOSELECT) && (d = mail_valid (NIL,name,NIL)) &&
(d != &dummydriver)) attributes &= ~LATT_NOSELECT;
if (!contents || /* notify main program */
(!(attributes & LATT_NOSELECT) && (csiz = strlen (contents)) &&
(s = mailboxfile (tmp,name)) &&
(*s || (s = mail_parameters (NIL,GET_INBOXPATH,tmp))) &&
!stat (s,&sbuf) && (d || (csiz <= sbuf.st_size)) &&
SAFE_SCAN_CONTENTS (d,tmp,contents,csiz,sbuf.st_size)))
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 *s,tmp[MAILTMPLEN];
long ret = NIL;
/* validate name */
if (!(compare_cstring (mailbox,"INBOX") && (s = dummy_file (tmp,mailbox)))) {
sprintf (tmp,"Can't create %.80s: invalid name",mailbox);
MM_LOG (tmp,ERROR);
}
/* create the name, done if made directory */
else if ((ret = dummy_create_path (stream,tmp,get_dir_protection(mailbox)))&&
(s = strrchr (s,'/')) && !s[1]) return T;
return ret ? set_mbx_protections (mailbox,tmp) : NIL;
}
/* 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,'/');
int wantdir = t && !t[1];
int mask = umask (0);
if (wantdir) *t = '\0'; /* flush trailing delimiter for directory */
if (s = strrchr (path,'/')) { /* found superior to this name? */
c = *++s; /* remember first character of inferior */
*s = '\0'; /* tie off to get just superior */
/* name doesn't exist, create it */
if ((stat (path,&sbuf) || ((sbuf.st_mode & S_IFMT) != S_IFDIR)) &&
!dummy_create_path (stream,path,dirmode)) {
umask (mask); /* restore mask */
return NIL;
}
*s = c; /* restore full name */
}
if (wantdir) { /* want to create directory? */
ret = !mkdir (path,(int) dirmode);
*t = '/'; /* restore directory delimiter */
}
/* create file */
else if ((fd = open (path,O_WRONLY|O_CREAT|O_EXCL,
(long) mail_parameters(NIL,GET_MBXPROTECTION,NIL))) >=0)
ret = !close (fd);
if (!ret) { /* error? */
sprintf (tmp,"Can't create mailbox node %.80s: %.80s",path,strerror (errno));
MM_LOG (tmp,ERROR);
}
umask (mask); /* restore mask */
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 (!(s = dummy_file (tmp,mailbox))) {
sprintf (tmp,"Can't delete - invalid name: %.80s",s);
MM_LOG (tmp,ERROR);
}
/* no trailing / (workaround BSD kernel bug) */
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 %.80s: %.80s",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],mbx[MAILTMPLEN],oldname[MAILTMPLEN];
/* no trailing / allowed */
if (!dummy_file (oldname,old) || !(s = dummy_file (mbx,newname)) ||
stat (oldname,&sbuf) || ((s = strrchr (s,'/')) && !s[1] &&
((sbuf.st_mode & S_IFMT) != S_IFDIR))) {
sprintf (mbx,"Can't rename %.80s to %.80s: invalid name",old,newname);
MM_LOG (mbx,ERROR);
return NIL;
}
if (s) { /* found a directory delimiter? */
if (!s[1]) *s = '\0'; /* ignore trailing delimiter */
else { /* 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 (mbx,&sbuf) || ((sbuf.st_mode & S_IFMT) != S_IFDIR)) &&
!dummy_create (stream,mbx)) return NIL;
*s = c; /* restore full name */
}
}
/* rename of non-ex INBOX creates dest */
if (!compare_cstring (old,"INBOX") && stat (oldname,&sbuf))
return dummy_create (NIL,mbx);
if (rename (oldname,mbx)) {
sprintf (tmp,"Can't rename mailbox %.80s to %.80s: %.80s",old,newname,
strerror (errno));
MM_LOG (tmp,ERROR);
return NIL;
}
return T; /* return success */
}
/* Dummy open
* Accepts: stream to open
* Returns: stream on success, NIL on failure
*/
MAILSTREAM *dummy_open (MAILSTREAM *stream)
{
int fd;
char err[MAILTMPLEN],tmp[MAILTMPLEN];
struct stat sbuf;
/* OP_PROTOTYPE call */
if (!stream) return &dummyproto;
err[0] = '\0'; /* no error message yet */
/* can we open the file? */
if (!dummy_file (tmp,stream->mailbox))
sprintf (err,"Can't open this name: %.80s",stream->mailbox);
else if ((fd = open (tmp,O_RDONLY,NIL)) < 0) {
/* no, error unless INBOX */
if (compare_cstring (stream->mailbox,"INBOX"))
sprintf (err,"%.80s: %.80s",strerror (errno),stream->mailbox);
}
else { /* file had better be empty then */
fstat (fd,&sbuf); /* sniff at its size */
close (fd);
if ((sbuf.st_mode & S_IFMT) != S_IFREG)
sprintf (err,"Can't open %.80s: not a selectable mailbox",
stream->mailbox);
else if (sbuf.st_size) /* bogus format if non-empty */
sprintf (err,"Can't open %.80s (file %.80s): not in valid mailbox format",
stream->mailbox,tmp);
}
if (err[0]) { /* if an error happened */
MM_LOG (err,stream->silent ? WARN : ERROR);
return NIL;
}
else if (!stream->silent) { /* only if silence not requested */
mail_exists (stream,0); /* say there are 0 messages */
mail_recent (stream,0); /* and certainly no recent ones! */
stream->uid_validity = time (0);
}
stream->inbox = T; /* note that it's an INBOX */
return stream; /* return success */
}
/* 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
*/
long dummy_ping (MAILSTREAM *stream)
{
MAILSTREAM *test;
if (time (0) >= /* time to do another test? */
((time_t) (stream->gensym +
(long) mail_parameters (NIL,GET_SNARFINTERVAL,NIL)))) {
/* 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);
/* append to INBOX? */
if (!compare_cstring (mailbox,"INBOX")) {
/* yes, if no empty proto try creating */
if (!ts && !(*(ts = default_proto (NIL))->dtb->create) (ts,"INBOX"))
ts = NIL;
}
else if (dummy_file (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",NIL);
sprintf (tmp,"%.80s: %.80s",strerror (e),mailbox);
MM_LOG (tmp,ERROR); /* pass up error */
return NIL; /* always fails */
}
else 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: %.80s",mailbox);
MM_LOG (tmp,ERROR);
return NIL;
}
/* Dummy mail generate file string
* Accepts: temporary buffer to write into
* mailbox name string
* Returns: local file string or NIL if failure
*/
char *dummy_file (char *dst,char *name)
{
char *s = mailboxfile (dst,name);
/* return our standard inbox */
return (s && !*s) ? strcpy (dst,sysinbox ()) : s;
}
/* 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;
if (ref) { /* preliminary reference check */
if (*ref == '{') return NIL;/* remote reference not allowed */
else if (!*ref) ref = NIL; /* treat empty reference as no reference */
}
switch (*pat) {
case '#': /* namespace name */
if (mailboxfile (tmp,pat)) strcpy (tmp,pat);
else return NIL; /* unknown namespace */
break;
case '{': /* remote names not allowed */
return NIL;
case '/': /* rooted name */
case '~': /* home directory name */
if (!ref || (*ref != '#')) {/* non-namespace reference? */
strcpy (tmp,pat); /* yes, ignore */
break;
}
/* fall through */
default: /* apply reference for all other names */
if (!ref) strcpy (tmp,pat); /* just copy if no namespace */
else if ((*ref != '#') || mailboxfile (tmp,ref)) {
/* wants root of name? */
if (*pat == '/') strcpy (strchr (strcpy (tmp,ref),'/'),pat);
/* otherwise just append */
else sprintf (tmp,"%s%s",ref,pat);
}
else return NIL; /* unknown namespace */
}
/* 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;
}
|