mh.c
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上传日期:2007-01-04
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- /*
- * 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: 19 October 1999
- *
- * Copyright 1999 by the University of Washington
- *
- * Permission to use, copy, modify, and distribute this software and its
- * documentation for any purpose and without fee is hereby granted, provided
- * that the above copyright notice appears in all copies and that both the
- * above copyright notice and this permission notice appear in supporting
- * documentation, and that the name of the University of Washington not be
- * used in advertising or publicity pertaining to distribution of the software
- * without specific, written prior permission. This software is made
- * available "as is", and
- * THE UNIVERSITY OF WASHINGTON DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED,
- * WITH REGARD TO THIS SOFTWARE, INCLUDING WITHOUT LIMITATION ALL IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, AND IN
- * NO EVENT SHALL THE UNIVERSITY OF WASHINGTON BE LIABLE FOR ANY SPECIAL,
- * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
- * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, TORT
- * (INCLUDING NEGLIGENCE) OR STRICT LIABILITY, ARISING OUT OF OR IN CONNECTION
- * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- *
- */
- #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 "mh.h"
- #include "misc.h"
- #include "dummy.h"
- /* 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,
- (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 */
- NIL, /* 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};
- /* 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
- */
- static char *mh_profile = NIL; /* holds MH profile */
- static char *mh_path = NIL; /* holds MH path name */
- static long mh_once = 0; /* already through this code */
- int mh_isvalid (char *name,char *tmp,long synonly)
- {
- struct stat sbuf;
- /* name must be #MHINBOX or #mh/... */
- if (strcmp (ucase (strcpy (tmp,name)),"#MHINBOX") &&
- !(tmp[0] == '#' && tmp[1] == 'M' && tmp[2] == 'H' && tmp[3] == '/')) {
- errno = EINVAL; /* bogus name */
- return NIL;
- }
- if (!mh_path) { /* have MH path yet? */
- char *s,*t,*v;
- int fd;
- if (mh_once++) return NIL; /* only do this code once */
- if (!mh_profile) { /* have MH profile? */
- sprintf (tmp,"%s/%s",myhomedir (),MHPROFILE);
- mh_profile = cpystr (tmp);
- }
- if ((fd = open (tmp,O_RDONLY,NIL)) < 0) {
- strcat (tmp," not found, mh format names disabled");
- mm_log (tmp,WARN);
- return NIL;
- }
- 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] = ' '; /* tie it off */
- /* parse profile file */
- for (s = strtok (t,"rn"); s && *s; s = strtok (NIL,"rn")) {
- /* found space in line? */
- if (v = strpbrk (s," t")) {
- *v++ = ' '; /* tie off, is keyword "Path:"? */
- if (!strcmp (lcase (s),"path:")) {
- /* skip whitespace */
- while ((*v == ' ') || (*v == 't')) ++v;
- if (*v == '/') s = v; /* absolute path? */
- else sprintf (s = tmp,"%s/%s",myhomedir (),v);
- mh_path = cpystr (s); /* copy name */
- break; /* don't need to look at rest of file */
- }
- }
- }
- fs_give ((void **) &t); /* flush profile text */
- if (!mh_path) { /* default path if not in the profile */
- sprintf (tmp,"%s/%s",myhomedir (),MHPATH);
- mh_path = cpystr (tmp);
- }
- }
- if (synonly) return T; /* all done if syntax only check */
- errno = NIL; /* zap error */
- /* validate name as directory */
- return ((stat (mh_file (tmp,name),&sbuf) == 0) &&
- (sbuf.st_mode & S_IFMT) == S_IFDIR);
- }
- /* MH manipulate driver parameters
- * Accepts: function code
- * function-dependent value
- * Returns: function-dependent return value
- */
- void *mh_parameters (long function,void *value)
- {
- switch ((int) function) {
- case SET_MHPROFILE:
- if (mh_profile) fs_give ((void **) &mh_profile);
- mh_profile = cpystr ((char *) value);
- break;
- case GET_MHPROFILE:
- value = (void *) mh_profile;
- break;
- case SET_MHPATH:
- if (mh_path) fs_give ((void **) &mh_path);
- mh_path = cpystr ((char *) value);
- break;
- case GET_MHPATH:
- value = (void *) mh_path;
- break;
- default:
- value = NIL; /* error case */
- break;
- }
- return NIL;
- }
- /* 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 tmp[MAILTMPLEN];
- if (mh_canonicalize (tmp,ref,pat))
- mm_log ("Scan not valid for mh mailboxes",ERROR);
- }
- /* MH list mailboxes
- * Accepts: mail stream
- * reference
- * pattern to search
- */
- void mh_list (MAILSTREAM *stream,char *ref,char *pat)
- {
- 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 = ' ';
- else test[0] = ' ';
- mm_list (stream,'/',test,LATT_NOSELECT);
- }
- }
- /* get canonical form of name */
- else if (mh_canonicalize (test,ref,pat)) {
- 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] = ' '; /* tie off */
- }
- else strcpy (file,test+4);/* use just that name then */
- /* find directory name */
- if (s = strrchr (file,'/')) {
- *s = ' '; /* found, tie off at that point */
- s = file;
- }
- /* do the work */
- mh_list_work (stream,s,test,0);
- }
- /* always an INBOX */
- if (pmatch ("#MHINBOX",ucase (test)))
- mm_list (stream,NIL,"#MHINBOX",LATT_NOINFERIORS);
- }
- }
- /* 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 *s,tmp[MAILTMPLEN];
- /* assume error */
- sprintf (tmp,"Can't create mailbox %.80s: invalid MH-format name",mailbox);
- if (mailbox[0] == '#' && (mailbox[1] == 'm' || mailbox[1] == 'M') &&
- (mailbox[2] == 'h' || mailbox[2] == 'H') && mailbox[3] == '/')
- /* make sure valid name */
- for (s = mailbox + 4; s && *s;) {
- if (isdigit (*s)) s++; /* digit, check this node further... */
- /* all digit node, barf */
- else if (*s == '/') s = NIL;
- /* non-digit in node, skip to next node */
- else if (s = strchr (s+1,'/')) s++;
- else tmp[0] = NIL; /* no more nodes, good name */
- }
- if (tmp[0]) { /* was there an error in the name? */
- mm_log (tmp,ERROR); /* yes, log it */
- return NIL;
- }
- /* must not already exist */
- if (mh_isvalid (mailbox,tmp,NIL)) {
- sprintf (tmp,"Can't create mailbox %.80s: mailbox already exists",mailbox);
- mm_log (tmp,ERROR);
- return NIL;
- }
- if (!mh_path) return NIL; /* sorry */
- /* try to make it */
- if (!(mh_file (tmp,mailbox) && dummy_create_path (stream,strcat (tmp,"/")))){
- sprintf (tmp,"Can't create mailbox %.80s: %s",mailbox,strerror (errno));
- mm_log (tmp,ERROR);
- return NIL;
- }
- return T; /* return success */
- }
- /* 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];
- if (!(mailbox[0] == '#' && (mailbox[1] == 'm' || mailbox[1] == 'M') &&
- (mailbox[2] == 'h' || mailbox[2] == 'H') && mailbox[3] == '/')) {
- sprintf (tmp,"Can't delete mailbox %.80s: invalid MH-format name",mailbox);
- mm_log (tmp,ERROR);
- return NIL;
- }
- /* 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 */
- while (d = readdir (dirp)) /* massacre all numeric or comma files */
- if (mh_select (d) || (*d->d_name == ',') ||
- !strcmp (d->d_name,MHSEQUENCE)) {
- 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,ERROR);
- return NIL;
- }
- 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;
- if (!(old[0] == '#' && (old[1] == 'm' || old[1] == 'M') &&
- (old[2] == 'h' || old[2] == 'H') && old[3] == '/'))
- sprintf (tmp,"Can't delete mailbox %.80s: invalid MH-format name",old);
- /* old mailbox name must be valid */
- else if (!mh_isvalid (old,tmp,NIL))
- sprintf (tmp,"Can't rename mailbox %.80s: no such mailbox",old);
- else if (!(newname[0] == '#' && (newname[1] == 'm' || newname[1] == 'M') &&
- (newname[2] == 'h' || newname[2] == 'H') && newname[3] == '/'))
- 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 = ' '; /* 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 (stream,tmp1)) 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));
- /* note if an INBOX or not */
- stream->inbox = !strcmp (ucase (strcpy (tmp,stream->mailbox)),"#MHINBOX");
- mh_file (tmp,stream->mailbox);/* get directory name */
- LOCAL->dir = cpystr (tmp); /* copy directory name for later */
- /* make temporary buffer */
- LOCAL->buf = (char *) fs_get ((LOCAL->buflen = MAXMESSAGESIZE) + 1);
- 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);
- if (LOCAL->dir) fs_give ((void **) &LOCAL->dir);
- /* free local scratch buffer */
- if (LOCAL->buf) fs_give ((void **) &LOCAL->buf);
- /* nuke the local data */
- fs_give ((void **) &stream->local);
- stream->dtb = NIL; /* log out the DTB */
- 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)
- {
- unsigned long i,j;
- /* ugly and slow */
- if (stream && LOCAL && ((flags & FT_UID) ?
- mail_uid_sequence (stream,sequence) :
- mail_sequence (stream,sequence)))
- for (i = 1; i <= stream->nmsgs; i++)
- if (mail_elt (stream,i)->sequence) mh_header (stream,i,&j,NIL);
- }
- /* 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)
- {
- unsigned long i,hdrsize;
- int fd;
- char *t;
- struct stat sbuf;
- struct tm *tm;
- 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) {
- /* purge cache if too big */
- if (LOCAL->cachedtexts > max (stream->nmsgs * 4096,2097152)) {
- mail_gc (stream,GC_TEXTS);/* just can't keep that much */
- LOCAL->cachedtexts = 0;
- }
- /* build message file name */
- sprintf (LOCAL->buf,"%s/%lu",LOCAL->dir,elt->private.uid);
- if ((fd = open (LOCAL->buf,O_RDONLY,NIL)) < 0) return "";
- fstat (fd,&sbuf); /* get size of message */
- /* make plausible IMAPish date string */
- 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;
- /* is buffer big enough? */
- if (sbuf.st_size > LOCAL->buflen) {
- fs_give ((void **) &LOCAL->buf);
- LOCAL->buf = (char *) fs_get ((LOCAL->buflen = sbuf.st_size) + 1);
- }
- /* slurp message */
- read (fd,LOCAL->buf,sbuf.st_size);
- /* tie off file */
- LOCAL->buf[sbuf.st_size] = ' ';
- close (fd); /* flush message file */
- /* find end of header */
- for (i = 0,t = LOCAL->buf; *t && !(i && (*t == 'n')); i = (*t++ == 'n'));
- /* number of header bytes */
- hdrsize = (*t ? ++t : t) - LOCAL->buf;
- elt->rfc822_size = /* size of entire message in CRLF form */
- (elt->private.msg.header.text.size =
- strcrlfcpy ((char **) &elt->private.msg.header.text.data,&i,LOCAL->buf,
- hdrsize)) +
- (elt->private.msg.text.text.size =
- strcrlfcpy ((char **) &elt->private.msg.text.text.data,&i,t,
- sbuf.st_size - hdrsize));
- /* add to cached size */
- LOCAL->cachedtexts += elt->rfc822_size;
- }
- *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)
- {
- unsigned long i;
- 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_header (stream,msgno,&i,flags);
- 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);
- }
- if (!elt->private.msg.text.text.data) return NIL;
- 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,old;
- long nmsgs = stream->nmsgs;
- long recent = stream->recent;
- int silent = stream->silent;
- if (stat (LOCAL->dir,&sbuf)) { /* directory exists? */
- if (stream->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 */
- old = stream->uid_last;
- /* 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);
- stat (tmp,&sbuf); /* get inode poop */
- if (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 */
- stat (sysinbox (),&sbuf); /* see if anything there */
- /* can get sysinbox mailbox? */
- if (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,
- S_IREAD|S_IWRITE)) >= 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;
- mh_setdate (LOCAL->buf,elt);
- }
- else { /* failed to snarf */
- if (fd) { /* did it ever get opened? */
- mm_log ("Message copy to MH mailbox failed",ERROR);
- close (fd); /* close descriptor */
- unlink (LOCAL->buf);/* flush this file */
- }
- else {
- sprintf (tmp,"Can't add message: %s",strerror (errno));
- mm_log (tmp,ERROR);
- }
- stream->silent = silent;
- return NIL; /* note that something is badly wrong */
- }
- sprintf (tmp,"%lu",i); /* delete it from the sysinbox */
- mail_flag (sysibx,tmp,"\Deleted",ST_SET);
- }
- stat (LOCAL->dir,&sbuf); /* update scan time */
- 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
- */
- void mh_expunge (MAILSTREAM *stream)
- {
- MESSAGECACHE *elt;
- unsigned long i = 1;
- unsigned long n = 0;
- unsigned long recent = stream->recent;
- mm_critical (stream); /* go critical */
- while (i <= stream->nmsgs) { /* for each message */
- /* if deleted, need to trash it */
- if ((elt = mail_elt (stream,i))->deleted) {
- 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 (elt->recent) --recent;/* if recent, note one less recent message */
- mail_expunged (stream,i); /* notify upper levels */
- 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);
- }
- /* 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)
- {
- STRING st;
- MESSAGECACHE *elt;
- struct stat sbuf;
- int fd;
- unsigned long i;
- char flags[MAILTMPLEN],date[MAILTMPLEN];
- /* 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) { /* make plausible IMAPish date string */
- 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;
- }
- /* is buffer big enough? */
- if (sbuf.st_size > LOCAL->buflen) {
- fs_give ((void **) &LOCAL->buf);
- LOCAL->buf = (char *) fs_get ((LOCAL->buflen = sbuf.st_size) + 1);
- }
- /* slurp message */
- read (fd,LOCAL->buf,sbuf.st_size);
- /* tie off file */
- LOCAL->buf[sbuf.st_size] = ' ';
- close (fd); /* flush message file */
- INIT (&st,mail_string,(void *) LOCAL->buf,sbuf.st_size);
- /* init flag string */
- flags[0] = flags[1] = ' ';
- 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 (!mail_append_full (NIL,mailbox,flags,date,&st)) return NIL;
- if (options & CP_MOVE) elt->deleted = T;
- }
- return T; /* return success */
- }
- /* MH mail append message from stringstruct
- * Accepts: MAIL stream
- * destination mailbox
- * stringstruct of messages to append
- * Returns: T if append successful, else NIL
- */
- long mh_append (MAILSTREAM *stream,char *mailbox,char *flags,char *date,
- STRING *message)
- {
- struct direct **names;
- int fd;
- char c,*s,tmp[MAILTMPLEN];
- MESSAGECACHE elt;
- long i,last,nfiles;
- long size = 0;
- long ret = LONGT;
- unsigned long uf;
- /* short f = */ mail_parse_flags (stream ? stream : &mhproto,flags,&uf);
- 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);
- return NIL;
- }
- }
- /* N.B.: can't use LOCAL->buf for tmp */
- /* make sure valid mailbox */
- if (!mh_isvalid (mailbox,tmp,NIL)) switch (errno) {
- case ENOENT: /* no such file? */
- if ((mailbox[0] == '#') && ((mailbox[1] == 'M') || (mailbox[1] == 'm')) &&
- ((mailbox[2] == 'H') || (mailbox[2] == 'h')) &&
- ((mailbox[3] == 'I') || (mailbox[3] == 'i')) &&
- ((mailbox[4] == 'N') || (mailbox[4] == 'n')) &&
- ((mailbox[5] == 'B') || (mailbox[5] == 'b')) &&
- ((mailbox[6] == 'O') || (mailbox[6] == 'o')) &&
- ((mailbox[7] == 'X') || (mailbox[7] == 'x')) && !mailbox[8])
- mh_create (NIL,"INBOX");
- else {
- 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;
- }
- mh_file (tmp,mailbox); /* build file name we will use */
- 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);
- sprintf (tmp + strlen (tmp),"/%ld",++last);
- if ((fd = open (tmp,O_WRONLY|O_CREAT|O_EXCL,S_IREAD|S_IWRITE)) < 0) {
- sprintf (tmp,"Can't open append message: %s",strerror (errno));
- mm_log (tmp,ERROR);
- return NIL;
- }
- i = SIZE (message); /* get size of message */
- s = (char *) fs_get (i + 1); /* get space for the data */
- /* copy the data w/o CR's */
- while (i--) if ((c = SNX (message)) != ' 15') s[size++] = c;
- mm_critical (stream); /* go critical */
- /* write the data */
- if ((write (fd,s,size) < 0) || fsync (fd)) {
- unlink (tmp); /* delete message */
- sprintf (tmp,"Message append failed: %s",strerror (errno));
- mm_log (tmp,ERROR);
- ret = NIL;
- }
- close (fd); /* close the file */
- /* set the date for this message */
- if (date) mh_setdate (tmp,&elt);
- mm_nocritical (stream); /* release critical */
- fs_give ((void **) &s); /* flush the buffer */
- 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,tmp[MAILTMPLEN];
- /* build composite name */
- sprintf (dst,"%s/%.900s",mh_path,
- strcmp (ucase (strcpy (tmp,name)),"#MHINBOX") ? name + 4 : "inbox");
- /* tie off unnecessary trailing / */
- if ((s = strrchr (dst,'/')) && !s[1] && (s[-1] == '/')) *s = ' ';
- 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)
- {
- char 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 */
- return (mh_isvalid (pattern,tmp,T));
- }
- /* 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 */
- }