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/* ========================================================================
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* Copyright 1988-2006 University of Washington
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* ========================================================================
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* Program: MH mail routines
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* Author(s): Mark Crispin
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* Networks and Distributed Computing
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* Computing & Communications
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* University of Washington
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* Administration Building, AG-44
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* Internet: MRC@CAC.Washington.EDU
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* Date: 23 February 1992
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* Last Edited: 18 December 2006
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extern int errno; /* just in case */
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/* Build parameters */
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#define MHINBOX "#mhinbox" /* corresponds to namespace in env_unix.c */
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#define MHINBOXDIR "inbox"
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#define MHPROFILE ".mh_profile"
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#define MHSEQUENCE ".mh_sequence"
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#define MHSEQUENCES ".mh_sequences"
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/* mh_load_message() flags */
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#define MLM_HEADER 0x1 /* load message text */
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#define MLM_TEXT 0x2 /* load message text */
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/* MH I/O stream local data */
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typedef struct mh_local {
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char *dir; /* spool directory name */
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unsigned char buf[CHUNKSIZE]; /* temporary buffer */
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unsigned long cachedtexts; /* total size of all cached texts */
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time_t scantime; /* last time directory scanned */
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/* Convenient access to local data */
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#define LOCAL ((MHLOCAL *) stream->local)
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/* Function prototypes */
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DRIVER *mh_valid (char *name);
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int mh_isvalid (char *name,char *tmp,long synonly);
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int mh_namevalid (char *name);
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char *mh_path (char *tmp);
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void *mh_parameters (long function,void *value);
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long mh_dirfmttest (char *name);
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void mh_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents);
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void mh_list (MAILSTREAM *stream,char *ref,char *pat);
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void mh_lsub (MAILSTREAM *stream,char *ref,char *pat);
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void mh_list_work (MAILSTREAM *stream,char *dir,char *pat,long level);
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long mh_subscribe (MAILSTREAM *stream,char *mailbox);
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long mh_unsubscribe (MAILSTREAM *stream,char *mailbox);
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long mh_create (MAILSTREAM *stream,char *mailbox);
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long mh_delete (MAILSTREAM *stream,char *mailbox);
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long mh_rename (MAILSTREAM *stream,char *old,char *newname);
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MAILSTREAM *mh_open (MAILSTREAM *stream);
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void mh_close (MAILSTREAM *stream,long options);
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void mh_fast (MAILSTREAM *stream,char *sequence,long flags);
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void mh_load_message (MAILSTREAM *stream,unsigned long msgno,long flags);
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char *mh_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *length,
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long mh_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags);
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long mh_ping (MAILSTREAM *stream);
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void mh_check (MAILSTREAM *stream);
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long mh_expunge (MAILSTREAM *stream,char *sequence,long options);
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long mh_copy (MAILSTREAM *stream,char *sequence,char *mailbox,
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long mh_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data);
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int mh_select (struct direct *name);
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int mh_numsort (const void *d1,const void *d2);
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char *mh_file (char *dst,char *name);
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long mh_canonicalize (char *pattern,char *ref,char *pat);
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void mh_setdate (char *file,MESSAGECACHE *elt);
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/* MH mail routines */
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/* Driver dispatch used by MAIL */
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"mh", /* driver name */
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DR_MAIL|DR_LOCAL|DR_NOFAST|DR_NAMESPACE|DR_NOSTICKY|DR_DIRFMT,
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(DRIVER *) NIL, /* next driver */
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mh_valid, /* mailbox is valid for us */
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mh_parameters, /* manipulate parameters */
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mh_scan, /* scan mailboxes */
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mh_list, /* find mailboxes */
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mh_lsub, /* find subscribed mailboxes */
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mh_subscribe, /* subscribe to mailbox */
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mh_unsubscribe, /* unsubscribe from mailbox */
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mh_create, /* create mailbox */
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mh_delete, /* delete mailbox */
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mh_rename, /* rename mailbox */
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mail_status_default, /* status of mailbox */
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mh_open, /* open mailbox */
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mh_close, /* close mailbox */
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mh_fast, /* fetch message "fast" attributes */
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NIL, /* fetch message flags */
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NIL, /* fetch overview */
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NIL, /* fetch message envelopes */
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mh_header, /* fetch message header */
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mh_text, /* fetch message body */
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NIL, /* fetch partial message text */
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NIL, /* unique identifier */
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NIL, /* message number */
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NIL, /* modify flags */
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NIL, /* per-message modify flags */
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NIL, /* search for message based on criteria */
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NIL, /* sort messages */
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NIL, /* thread messages */
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mh_ping, /* ping mailbox to see if still alive */
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mh_check, /* check for new messages */
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mh_expunge, /* expunge deleted messages */
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mh_copy, /* copy messages to another mailbox */
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mh_append, /* append string message to mailbox */
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NIL /* garbage collect stream */
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/* prototype stream */
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MAILSTREAM mhproto = {&mhdriver};
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static char *mh_profile = NIL; /* holds MH profile */
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static char *mh_pathname = NIL; /* holds MH path name */
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static long mh_once = 0; /* already snarled once */
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static long mh_allow_inbox =NIL;/* allow INBOX as well as MHINBOX */
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/* MH mail validate mailbox
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* Accepts: mailbox name
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* Returns: our driver if name is valid, NIL otherwise
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DRIVER *mh_valid (char *name)
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char tmp[MAILTMPLEN];
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return mh_isvalid (name,tmp,T) ? &mhdriver : NIL;
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/* MH mail test for valid mailbox
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* Accepts: mailbox name
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* temporary buffer to use
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* syntax only test flag
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* Returns: T if valid, NIL otherwise
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int mh_isvalid (char *name,char *tmp,long synonly)
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char *s,*t,altname[MAILTMPLEN];
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errno = NIL; /* zap any error condition */
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if ((mh_allow_inbox && !compare_cstring (name,"INBOX")) ||
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!compare_cstring (name,MHINBOX) ||
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((name[0] == '#') && ((name[1] == 'm') || (name[1] == 'M')) &&
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((name[2] == 'h') || (name[2] == 'H')) && (name[3] == '/') && name[4])){
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if (mh_path (tmp)) /* validate name if INBOX or not synonly */
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ret = (synonly && compare_cstring (name,"INBOX")) ?
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T : ((stat (mh_file (tmp,name),&sbuf) == 0) &&
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(sbuf.st_mode & S_IFMT) == S_IFDIR);
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else if (!mh_once++) { /* only report error once */
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sprintf (tmp,"%.900s not found, mh format names disabled",mh_profile);
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/* see if non-NS name within mh hierarchy */
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else if ((name[0] != '#') && (s = mh_path (tmp)) && (i = strlen (s)) &&
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(t = mailboxfile (tmp,name)) && !strncmp (t,s,i) &&
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(tmp[i] == '/') && tmp[i+1]) {
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sprintf (altname,"#mh%.900s",tmp+i);
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/* can't do synonly here! */
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ret = mh_isvalid (altname,tmp,NIL);
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else errno = EINVAL; /* bogus name */
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/* MH mail test for valid mailbox
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* Accepts: mailbox name
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* Returns: T if valid, NIL otherwise
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int mh_namevalid (char *name)
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if (name[0] == '#' && (name[1] == 'm' || name[1] == 'M') &&
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(name[2] == 'h' || name[2] == 'H') && name[3] == '/')
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for (s = name; s && *s;) { /* make sure no all-digit nodes */
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if (isdigit (*s)) s++; /* digit, check this node further... */
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else if (*s == '/') break;/* all digit node, barf */
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/* non-digit, skip to next node or return */
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else if (!((s = strchr (s+1,'/')) && *++s)) return T;
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return NIL; /* all numeric or empty node */
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* Accepts: temporary buffer
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* Returns: MH path or NIL if MH disabled
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char *mh_path (char *tmp)
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if (!mh_profile) { /* build mh_profile and mh_pathname now */
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sprintf (tmp,"%s/%s",myhomedir (),MHPROFILE);
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if ((fd = open (mh_profile = cpystr (tmp),O_RDONLY,NIL)) >= 0) {
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fstat (fd,&sbuf); /* yes, get size and read file */
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read (fd,(t = (char *) fs_get (sbuf.st_size + 1)),sbuf.st_size);
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close (fd); /* don't need the file any more */
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t[sbuf.st_size] = '\0'; /* tie it off */
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/* parse profile file */
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for (s = strtok (t,"\r\n"); s && *s; s = strtok (NIL,"\r\n")) {
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/* found space in line? */
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if (v = strpbrk (s," \t")) {
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*v++ = '\0'; /* tie off, is keyword "Path:"? */
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if (!compare_cstring (s,"Path:")) {
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/* skip whitespace */
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while ((*v == ' ') || (*v == '\t')) ++v;
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if (*v == '/') s = v;
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else sprintf (s = tmp,"%s/%s",myhomedir (),v);
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mh_pathname = cpystr (s);
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break; /* don't need to look at rest of file */
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fs_give ((void **) &t); /* flush profile text */
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if (!mh_pathname) { /* default path if not in the profile */
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sprintf (tmp,"%s/%s",myhomedir (),MHPATH);
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mh_pathname = cpystr (tmp);
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/* MH manipulate driver parameters
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* Accepts: function code
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* function-dependent value
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* Returns: function-dependent return value
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void *mh_parameters (long function,void *value)
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switch ((int) function) {
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if (value) ret = mh_file ((char *) value,"INBOX");
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ret = (void *) mh_dirfmttest;
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if (mh_profile) fs_give ((void **) &mh_profile);
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mh_profile = cpystr ((char *) value);
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ret = (void *) mh_profile;
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if (mh_pathname) fs_give ((void **) &mh_pathname);
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mh_pathname = cpystr ((char *) value);
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ret = (void *) mh_pathname;
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case SET_MHALLOWINBOX:
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mh_allow_inbox = value ? T : NIL;
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case GET_MHALLOWINBOX:
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ret = (void *) (mh_allow_inbox ? VOIDT : NIL);
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/* MX test for directory format internal node
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* Accepts: candidate node name
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* Returns: T if internal name, NIL otherwise
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long mh_dirfmttest (char *s)
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/* sequence(s) file is an internal name */
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if (strcmp (s,MHSEQUENCE) && strcmp (s,MHSEQUENCES)) {
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if (*s == MHCOMMA) ++s; /* else comma + all numeric name */
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/* success if all-numeric */
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while (c = *s++) if (!isdigit (c)) return NIL;
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* Accepts: mail stream
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void mh_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents)
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char *s,test[MAILTMPLEN],file[MAILTMPLEN];
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if (!pat || !*pat) { /* empty pattern? */
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if (mh_canonicalize (test,ref,"*")) {
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/* tie off name at root */
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if (s = strchr (test,'/')) *++s = '\0';
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mm_list (stream,'/',test,LATT_NOSELECT);
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/* get canonical form of name */
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else if (mh_canonicalize (test,ref,pat)) {
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if (contents) { /* maybe I'll implement this someday */
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mm_log ("Scan not valid for mh mailboxes",ERROR);
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if (test[3] == '/') { /* looking down levels? */
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/* yes, found any wildcards? */
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if (s = strpbrk (test,"%*")) {
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/* yes, copy name up to that point */
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strncpy (file,test+4,i = s - (test+4));
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file[i] = '\0'; /* tie off */
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else strcpy (file,test+4);/* use just that name then */
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/* find directory name */
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if (s = strrchr (file,'/')) {
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*s = '\0'; /* found, tie off at that point */
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mh_list_work (stream,s,test,0);
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/* always an INBOX */
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if (!compare_cstring (test,MHINBOX))
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mm_list (stream,NIL,MHINBOX,LATT_NOINFERIORS);
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* Accepts: mail stream
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void mh_list (MAILSTREAM *stream,char *ref,char *pat)
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mh_scan (stream,ref,pat,NIL);
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/* MH list subscribed mailboxes
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* Accepts: mail stream
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void mh_lsub (MAILSTREAM *stream,char *ref,char *pat)
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char *s,test[MAILTMPLEN];
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/* get canonical form of name */
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if (mh_canonicalize (test,ref,pat) && (s = sm_read (&sdb))) {
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do if (pmatch_full (s,test,'/')) mm_lsub (stream,'/',s,NIL);
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while (s = sm_read (&sdb)); /* until no more subscriptions */
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/* MH list mailboxes worker routine
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* Accepts: mail stream
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* directory name to search
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void mh_list_work (MAILSTREAM *stream,char *dir,char *pat,long level)
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char *cp,*np,curdir[MAILTMPLEN],name[MAILTMPLEN];
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/* build MH name to search */
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if (dir) sprintf (name,"#mh/%s/",dir);
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else strcpy (name,"#mh/");
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/* make directory name, punt if bogus */
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if (!mh_file (curdir,name)) return;
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cp = curdir + strlen (curdir);/* end of directory name */
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np = name + strlen (name); /* end of MH name */
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if (dp = opendir (curdir)) { /* open directory */
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while (d = readdir (dp)) /* scan, ignore . and numeric names */
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if ((d->d_name[0] != '.') && !mh_select (d)) {
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strcpy (cp,d->d_name); /* make directory name */
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if (!stat (curdir,&sbuf) && ((sbuf.st_mode & S_IFMT) == S_IFDIR)) {
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strcpy (np,d->d_name);/* make mh name of directory name */
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/* yes, an MH name if full match */
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if (pmatch_full (name,pat,'/')) mm_list (stream,'/',name,NIL);
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/* check if should recurse */
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if (dmatch (name,pat,'/') &&
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(level < (long) mail_parameters (NIL,GET_LISTMAXLEVEL,NIL)))
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mh_list_work (stream,name+4,pat,level+1);
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closedir (dp); /* all done, flush directory */
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/* MH mail subscribe to mailbox
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* Accepts: mail stream
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* mailbox to add to subscription list
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* Returns: T on success, NIL on failure
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long mh_subscribe (MAILSTREAM *stream,char *mailbox)
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return sm_subscribe (mailbox);
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/* MH mail unsubscribe to mailbox
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* Accepts: mail stream
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* mailbox to delete from subscription list
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* Returns: T on success, NIL on failure
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long mh_unsubscribe (MAILSTREAM *stream,char *mailbox)
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return sm_unsubscribe (mailbox);
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/* MH mail create mailbox
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* Accepts: mail stream
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* mailbox name to create
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* Returns: T on success, NIL on failure
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long mh_create (MAILSTREAM *stream,char *mailbox)
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char tmp[MAILTMPLEN];
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if (!mh_namevalid (mailbox)) /* validate name */
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sprintf (tmp,"Can't create mailbox %.80s: invalid MH-format name",mailbox);
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/* must not already exist */
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else if (mh_isvalid (mailbox,tmp,NIL))
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sprintf (tmp,"Can't create mailbox %.80s: mailbox already exists",mailbox);
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else if (!mh_path (tmp)) return NIL;
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else if (!(mh_file (tmp,mailbox) &&
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dummy_create_path (stream,strcat (tmp,"/"),
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get_dir_protection (mailbox))))
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sprintf (tmp,"Can't create mailbox %.80s: %s",mailbox,strerror (errno));
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else return LONGT; /* success */
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/* MH mail delete mailbox
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* mailbox name to delete
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* Returns: T on success, NIL on failure
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long mh_delete (MAILSTREAM *stream,char *mailbox)
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char tmp[MAILTMPLEN];
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/* is mailbox valid? */
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if (!mh_isvalid (mailbox,tmp,NIL)) {
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sprintf (tmp,"Can't delete mailbox %.80s: no such mailbox",mailbox);
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/* get name of directory */
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i = strlen (mh_file (tmp,mailbox));
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if (dirp = opendir (tmp)) { /* open directory */
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tmp[i++] = '/'; /* now apply trailing delimiter */
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/* massacre all mh owned files */
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while (d = readdir (dirp)) if (mh_dirfmttest (d->d_name)) {
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strcpy (tmp + i,d->d_name);
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unlink (tmp); /* sayonara */
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closedir (dirp); /* flush directory */
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/* try to remove the directory */
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if (rmdir (mh_file (tmp,mailbox))) {
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sprintf (tmp,"Can't delete mailbox %.80s: %s",mailbox,strerror (errno));
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return T; /* return success */
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/* MH mail rename mailbox
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* Accepts: MH mail stream
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* Returns: T on success, NIL on failure
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long mh_rename (MAILSTREAM *stream,char *old,char *newname)
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char c,*s,tmp[MAILTMPLEN],tmp1[MAILTMPLEN];
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/* old mailbox name must be valid */
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if (!mh_isvalid (old,tmp,NIL))
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sprintf (tmp,"Can't rename mailbox %.80s: no such mailbox",old);
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else if (!mh_namevalid (newname))
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sprintf (tmp,"Can't rename to mailbox %.80s: invalid MH-format name",
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/* new mailbox name must not be valid */
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else if (mh_isvalid (newname,tmp,NIL))
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sprintf (tmp,"Can't rename to mailbox %.80s: destination already exists",
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/* success if can rename the directory */
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else { /* found superior to destination name? */
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if (s = strrchr (mh_file (tmp1,newname),'/')) {
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c = *++s; /* remember first character of inferior */
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*s = '\0'; /* tie off to get just superior */
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/* name doesn't exist, create it */
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if ((stat (tmp1,&sbuf) || ((sbuf.st_mode & S_IFMT) != S_IFDIR)) &&
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!dummy_create_path (stream,tmp1,get_dir_protection (newname)))
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*s = c; /* restore full name */
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if (!rename (mh_file (tmp,old),tmp1)) return T;
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sprintf (tmp,"Can't rename mailbox %.80s to %.80s: %s",
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old,newname,strerror (errno));
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mm_log (tmp,ERROR); /* something failed */
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* Accepts: stream to open
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* Returns: stream on success, NIL on failure
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MAILSTREAM *mh_open (MAILSTREAM *stream)
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char tmp[MAILTMPLEN];
581
if (!stream) return &mhproto; /* return prototype for OP_PROTOTYPE call */
582
if (stream->local) fatal ("mh recycle stream");
583
stream->local = fs_get (sizeof (MHLOCAL));
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/* INBOXness is one of the following:
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* #mhinbox (case-independent)
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* #mh/inbox (mh is case-independent, inbox is case-dependent)
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* INBOX (case-independent
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stream->inbox = /* note if an INBOX or not */
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(!compare_cstring (stream->mailbox,MHINBOX) ||
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((stream->mailbox[0] == '#') &&
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((stream->mailbox[1] == 'm') || (stream->mailbox[1] == 'M')) &&
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((stream->mailbox[2] == 'h') || (stream->mailbox[2] == 'H')) &&
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(stream->mailbox[3] == '/') && !strcmp (stream->mailbox+4,MHINBOXDIR)) ||
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!compare_cstring (stream->mailbox,"INBOX")) ? T : NIL;
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mh_file (tmp,stream->mailbox);/* get directory name */
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LOCAL->dir = cpystr (tmp); /* copy directory name for later */
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LOCAL->scantime = 0; /* not scanned yet */
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LOCAL->cachedtexts = 0; /* no cached texts */
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stream->sequence++; /* bump sequence number */
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stream->nmsgs = stream->recent = 0;
603
if (!mh_ping (stream)) return NIL;
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if (!(stream->nmsgs || stream->silent))
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mm_log ("Mailbox is empty",(long) NIL);
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return stream; /* return stream to caller */
610
* Accepts: MAIL stream
614
void mh_close (MAILSTREAM *stream,long options)
616
if (LOCAL) { /* only if a file is open */
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int silent = stream->silent;
618
stream->silent = T; /* note this stream is dying */
619
if (options & CL_EXPUNGE) mh_expunge (stream,NIL,NIL);
620
if (LOCAL->dir) fs_give ((void **) &LOCAL->dir);
621
/* nuke the local data */
622
fs_give ((void **) &stream->local);
623
stream->dtb = NIL; /* log out the DTB */
624
stream->silent = silent; /* reset silent state */
629
/* MH mail fetch fast information
630
* Accepts: MAIL stream
635
void mh_fast (MAILSTREAM *stream,char *sequence,long flags)
639
/* set up metadata for all messages */
640
if (stream && LOCAL && ((flags & FT_UID) ?
641
mail_uid_sequence (stream,sequence) :
642
mail_sequence (stream,sequence)))
643
for (i = 1; i <= stream->nmsgs; i++)
644
if ((elt = mail_elt (stream,i))->sequence &&
645
!(elt->day && elt->rfc822_size)) mh_load_message (stream,i,NIL);
648
/* MH load message into cache
649
* Accepts: MAIL stream
654
void mh_load_message (MAILSTREAM *stream,unsigned long msgno,long flags)
656
unsigned long i,j,nlseen;
663
elt = mail_elt (stream,msgno);/* get elt */
664
/* build message file name */
665
sprintf (LOCAL->buf,"%s/%lu",LOCAL->dir,elt->private.uid);
666
/* anything we need not currently cached? */
667
if ((!elt->day || !elt->rfc822_size ||
668
((flags & MLM_HEADER) && !elt->private.msg.header.text.data) ||
669
((flags & MLM_TEXT) && !elt->private.msg.text.text.data)) &&
670
((fd = open (LOCAL->buf,O_RDONLY,NIL)) >= 0)) {
671
fstat (fd,&sbuf); /* get file metadata */
672
d.fd = fd; /* set up file descriptor */
673
d.pos = 0; /* start of file */
674
d.chunk = LOCAL->buf;
675
d.chunksize = CHUNKSIZE;
676
INIT (&bs,fd_string,&d,sbuf.st_size);
677
if (!elt->day) { /* set internaldate to file date */
678
struct tm *tm = gmtime (&sbuf.st_mtime);
679
elt->day = tm->tm_mday; elt->month = tm->tm_mon + 1;
680
elt->year = tm->tm_year + 1900 - BASEYEAR;
681
elt->hours = tm->tm_hour; elt->minutes = tm->tm_min;
682
elt->seconds = tm->tm_sec;
683
elt->zhours = 0; elt->zminutes = 0;
686
if (!elt->rfc822_size) { /* know message size yet? */
687
for (i = 0, j = SIZE (&bs), nlseen = 0; j--; ) switch (SNX (&bs)) {
688
case '\015': /* unlikely carriage return */
689
if (!j || (CHR (&bs) != '\012')) {
690
i++; /* ugh, raw CR */
694
SNX (&bs); /* eat the line feed, drop in */
696
case '\012': /* line feed? */
697
i += 2; /* count a CRLF */
698
/* header size known yet? */
699
if (!elt->private.msg.header.text.size && nlseen) {
700
/* note position in file */
701
elt->private.special.text.size = GETPOS (&bs);
702
/* and CRLF-adjusted size */
703
elt->private.msg.header.text.size = i;
705
nlseen = T; /* note newline seen */
707
default: /* ordinary chararacter */
712
SETPOS (&bs,0); /* restore old position */
713
elt->rfc822_size = i; /* note that we have size now */
714
/* header is entire message if no delimiter */
715
if (!elt->private.msg.header.text.size)
716
elt->private.msg.header.text.size = elt->rfc822_size;
717
/* text is remainder of message */
718
elt->private.msg.text.text.size =
719
elt->rfc822_size - elt->private.msg.header.text.size;
721
/* need to load cache with message data? */
722
if (((flags & MLM_HEADER) && !elt->private.msg.header.text.data) ||
723
((flags & MLM_TEXT) && !elt->private.msg.text.text.data)) {
724
/* purge cache if too big */
725
if (LOCAL->cachedtexts > max (stream->nmsgs * 4096,2097152)) {
726
/* just can't keep that much */
727
mail_gc (stream,GC_TEXTS);
728
LOCAL->cachedtexts = 0;
731
if ((flags & MLM_HEADER) && !elt->private.msg.header.text.data) {
732
t = elt->private.msg.header.text.data =
733
(unsigned char *) fs_get (elt->private.msg.header.text.size + 1);
734
LOCAL->cachedtexts += elt->private.msg.header.text.size;
735
/* read in message header */
736
for (i = 0; i < elt->private.msg.header.text.size; i++)
737
switch (c = SNX (&bs)) {
738
case '\015': /* unlikely carriage return */
740
if ((CHR (&bs) == '\012')) {
745
case '\012': /* line feed? */
752
*t = '\0'; /* tie off string */
753
if ((t - elt->private.msg.header.text.data) !=
754
elt->private.msg.header.text.size) fatal ("mh hdr size mismatch");
756
if ((flags & MLM_TEXT) && !elt->private.msg.text.text.data) {
757
t = elt->private.msg.text.text.data =
758
(unsigned char *) fs_get (elt->private.msg.text.text.size + 1);
759
SETPOS (&bs,elt->private.special.text.size);
760
LOCAL->cachedtexts += elt->private.msg.text.text.size;
761
/* read in message text */
762
for (i = 0; i < elt->private.msg.text.text.size; i++)
763
switch (c = SNX (&bs)) {
764
case '\015': /* unlikely carriage return */
766
if ((CHR (&bs) == '\012')) {
771
case '\012': /* line feed? */
778
*t = '\0'; /* tie off string */
779
if ((t - elt->private.msg.text.text.data) !=
780
elt->private.msg.text.text.size) fatal ("mh txt size mismatch");
783
close (fd); /* flush message file */
787
/* MH mail fetch message header
788
* Accepts: MAIL stream
790
* pointer to returned header text length
792
* Returns: message header in RFC822 format
795
char *mh_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *length,
799
*length = 0; /* default to empty */
800
if (flags & FT_UID) return "";/* UID call "impossible" */
801
elt = mail_elt (stream,msgno);/* get elt */
802
if (!elt->private.msg.header.text.data)
803
mh_load_message (stream,msgno,MLM_HEADER);
804
*length = elt->private.msg.header.text.size;
805
return (char *) elt->private.msg.header.text.data;
809
/* MH mail fetch message text (body only)
810
* Accepts: MAIL stream
812
* pointer to returned stringstruct
814
* Returns: T on success, NIL on failure
817
long mh_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags)
820
/* UID call "impossible" */
821
if (flags & FT_UID) return NIL;
822
elt = mail_elt (stream,msgno);/* get elt */
823
/* snarf message if don't have it yet */
824
if (!elt->private.msg.text.text.data) {
825
mh_load_message (stream,msgno,MLM_TEXT);
826
if (!elt->private.msg.text.text.data) return NIL;
828
if (!(flags & FT_PEEK)) { /* mark as seen */
829
mail_elt (stream,msgno)->seen = T;
830
mm_flags (stream,msgno);
832
INIT (bs,mail_string,elt->private.msg.text.text.data,
833
elt->private.msg.text.text.size);
837
/* MH mail ping mailbox
838
* Accepts: MAIL stream
839
* Returns: T if stream alive, else NIL
842
long mh_ping (MAILSTREAM *stream)
844
MAILSTREAM *sysibx = NIL;
845
MESSAGECACHE *elt,*selt;
847
char *s,tmp[MAILTMPLEN];
850
unsigned long old = stream->uid_last;
851
long nmsgs = stream->nmsgs;
852
long recent = stream->recent;
853
int silent = stream->silent;
854
if (stat (LOCAL->dir,&sbuf)) {/* directory exists? */
855
if (stream->inbox && /* no, create if INBOX */
856
dummy_create_path (stream,strcat (mh_file (tmp,MHINBOX),"/"),
857
get_dir_protection ("INBOX"))) return T;
858
sprintf (tmp,"Can't open mailbox %.80s: no such mailbox",stream->mailbox);
862
stream->silent = T; /* don't pass up mm_exists() events yet */
863
if (sbuf.st_ctime != LOCAL->scantime) {
864
struct direct **names = NIL;
865
long nfiles = scandir (LOCAL->dir,&names,mh_select,mh_numsort);
866
if (nfiles < 0) nfiles = 0; /* in case error */
867
/* note scanned now */
868
LOCAL->scantime = sbuf.st_ctime;
870
for (i = 0; i < nfiles; ++i) {
871
/* if newly seen, add to list */
872
if ((j = atoi (names[i]->d_name)) > old) {
873
mail_exists (stream,++nmsgs);
874
stream->uid_last = (elt = mail_elt (stream,nmsgs))->private.uid = j;
875
elt->valid = T; /* note valid flags */
876
if (old) { /* other than the first pass? */
877
elt->recent = T; /* yup, mark as recent */
878
recent++; /* bump recent count */
880
else { /* see if already read */
881
sprintf (tmp,"%s/%s",LOCAL->dir,names[i]->d_name);
882
if (!stat (tmp,&sbuf) && (sbuf.st_atime > sbuf.st_mtime))
886
fs_give ((void **) &names[i]);
889
if (s = (void *) names) fs_give ((void **) &s);
892
/* if INBOX, snarf from system INBOX */
893
if (stream->inbox && strcmp (sysinbox (),stream->mailbox)) {
894
old = stream->uid_last;
895
mm_critical (stream); /* go critical */
896
/* see if anything in system inbox */
897
if (!stat (sysinbox (),&sbuf) && sbuf.st_size &&
898
(sysibx = mail_open (sysibx,sysinbox (),OP_SILENT)) &&
899
!sysibx->rdonly && (r = sysibx->nmsgs)) {
900
for (i = 1; i <= r; ++i) {/* for each message in sysinbox mailbox */
901
/* build file name we will use */
902
sprintf (LOCAL->buf,"%s/%lu",LOCAL->dir,++old);
903
/* snarf message from Berkeley mailbox */
904
selt = mail_elt (sysibx,i);
905
if (((fd = open (LOCAL->buf,O_WRONLY|O_CREAT|O_EXCL,
906
(int) mail_parameters (NIL,GET_MBXPROTECTION,NIL)))
908
(s = mail_fetchheader_full (sysibx,i,NIL,&j,FT_INTERNAL)) &&
909
(write (fd,s,j) == j) &&
910
(s = mail_fetchtext_full (sysibx,i,&j,FT_INTERNAL|FT_PEEK)) &&
911
(write (fd,s,j) == j) && !fsync (fd) && !close (fd)) {
912
/* swell the cache */
913
mail_exists (stream,++nmsgs);
914
stream->uid_last = /* create new elt, note its file number */
915
(elt = mail_elt (stream,nmsgs))->private.uid = old;
916
recent++; /* bump recent count */
917
/* set up initial flags and date */
918
elt->valid = elt->recent = T;
919
elt->seen = selt->seen;
920
elt->deleted = selt->deleted;
921
elt->flagged = selt->flagged;
922
elt->answered = selt->answered;
923
elt->draft = selt->draft;
924
elt->day = selt->day;elt->month = selt->month;elt->year = selt->year;
925
elt->hours = selt->hours;elt->minutes = selt->minutes;
926
elt->seconds = selt->seconds;
927
elt->zhours = selt->zhours; elt->zminutes = selt->zminutes;
928
mh_setdate (LOCAL->buf,elt);
929
sprintf (tmp,"%lu",i);/* delete it from the sysinbox */
930
mail_flag (sysibx,tmp,"\\Deleted",ST_SET);
933
else { /* failed to snarf */
934
if (fd) { /* did it ever get opened? */
935
close (fd); /* close descriptor */
936
unlink (LOCAL->buf);/* flush this file */
938
sprintf (tmp,"Message copy to MH mailbox failed: %.80s",
941
r = 0; /* stop the snarf in its tracks */
944
/* update scan time */
945
if (!stat (LOCAL->dir,&sbuf)) LOCAL->scantime = sbuf.st_ctime;
946
mail_expunge (sysibx); /* now expunge all those messages */
948
if (sysibx) mail_close (sysibx);
949
mm_nocritical (stream); /* release critical */
951
stream->silent = silent; /* can pass up events now */
952
mail_exists (stream,nmsgs); /* notify upper level of mailbox size */
953
mail_recent (stream,recent);
954
return T; /* return that we are alive */
957
/* MH mail check mailbox
958
* Accepts: MAIL stream
961
void mh_check (MAILSTREAM *stream)
963
/* Perhaps in the future this will preserve flags */
964
if (mh_ping (stream)) mm_log ("Check completed",(long) NIL);
968
/* MH mail expunge mailbox
969
* Accepts: MAIL stream
970
* sequence to expunge if non-NIL
975
long mh_expunge (MAILSTREAM *stream,char *sequence,long options)
981
unsigned long recent = stream->recent;
982
if (ret = sequence ? ((options & EX_UID) ?
983
mail_uid_sequence (stream,sequence) :
984
mail_sequence (stream,sequence)) : LONGT) {
985
mm_critical (stream); /* go critical */
986
while (i <= stream->nmsgs) {/* for each message */
987
elt = mail_elt (stream,i);/* if deleted, need to trash it */
988
if (elt->deleted && (sequence ? elt->sequence : T)) {
989
sprintf (LOCAL->buf,"%s/%lu",LOCAL->dir,elt->private.uid);
990
if (unlink (LOCAL->buf)) {/* try to delete the message */
991
sprintf (LOCAL->buf,"Expunge of message %lu failed, aborted: %s",i,
993
mm_log (LOCAL->buf,(long) NIL);
997
LOCAL->cachedtexts -= ((elt->private.msg.header.text.data ?
998
elt->private.msg.header.text.size : 0) +
999
(elt->private.msg.text.text.data ?
1000
elt->private.msg.text.text.size : 0));
1001
mail_gc_msg (&elt->private.msg,GC_ENV | GC_TEXTS);
1002
/* if recent, note one less recent message */
1003
if (elt->recent) --recent;
1004
/* notify upper levels */
1005
mail_expunged (stream,i);
1006
n++; /* count up one more expunged message */
1008
else i++; /* otherwise try next message */
1010
if (n) { /* output the news if any expunged */
1011
sprintf (LOCAL->buf,"Expunged %lu messages",n);
1012
mm_log (LOCAL->buf,(long) NIL);
1014
else mm_log ("No messages deleted, so no update needed",(long) NIL);
1015
mm_nocritical (stream); /* release critical */
1016
/* notify upper level of new mailbox size */
1017
mail_exists (stream,stream->nmsgs);
1018
mail_recent (stream,recent);
1023
/* MH mail copy message(s)
1024
* Accepts: MAIL stream
1026
* destination mailbox
1028
* Returns: T if copy successful, else NIL
1031
long mh_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options)
1039
char flags[MAILTMPLEN],date[MAILTMPLEN];
1040
appenduid_t au = (appenduid_t) mail_parameters (NIL,GET_APPENDUID,NIL);
1042
/* copy the messages */
1043
if ((options & CP_UID) ? mail_uid_sequence (stream,sequence) :
1044
mail_sequence (stream,sequence))
1045
for (i = 1; i <= stream->nmsgs; i++)
1046
if ((elt = mail_elt (stream,i))->sequence) {
1047
sprintf (LOCAL->buf,"%s/%lu",LOCAL->dir,elt->private.uid);
1048
if ((fd = open (LOCAL->buf,O_RDONLY,NIL)) < 0) return NIL;
1049
fstat (fd,&sbuf); /* get size of message */
1050
if (!elt->day) { /* set internaldate to file date if needed */
1051
struct tm *tm = gmtime (&sbuf.st_mtime);
1052
elt->day = tm->tm_mday; elt->month = tm->tm_mon + 1;
1053
elt->year = tm->tm_year + 1900 - BASEYEAR;
1054
elt->hours = tm->tm_hour; elt->minutes = tm->tm_min;
1055
elt->seconds = tm->tm_sec;
1056
elt->zhours = 0; elt->zminutes = 0;
1058
d.fd = fd; /* set up file descriptor */
1059
d.pos = 0; /* start of file */
1060
d.chunk = LOCAL->buf;
1061
d.chunksize = CHUNKSIZE;
1062
/* kludge; mh_append would just strip CRs */
1063
INIT (&st,fd_string,&d,sbuf.st_size);
1064
/* init flag string */
1065
flags[0] = flags[1] = '\0';
1066
if (elt->seen) strcat (flags," \\Seen");
1067
if (elt->deleted) strcat (flags," \\Deleted");
1068
if (elt->flagged) strcat (flags," \\Flagged");
1069
if (elt->answered) strcat (flags," \\Answered");
1070
if (elt->draft) strcat (flags," \\Draft");
1071
flags[0] = '('; /* open list */
1072
strcat (flags,")"); /* close list */
1073
mail_date (date,elt); /* generate internal date */
1074
if (au) mail_parameters (NIL,SET_APPENDUID,NIL);
1075
if ((ret = mail_append_full (NIL,mailbox,flags,date,&st)) &&
1076
(options & CP_MOVE)) elt->deleted = T;
1077
if (au) mail_parameters (NIL,SET_APPENDUID,(void *) au);
1080
if (ret && mail_parameters (NIL,GET_COPYUID,NIL))
1081
mm_log ("Can not return meaningful COPYUID with this mailbox format",WARN);
1082
return ret; /* return success */
1085
/* MH mail append message from stringstruct
1086
* Accepts: MAIL stream
1087
* destination mailbox
1090
* Returns: T if append successful, else NIL
1093
long mh_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data)
1095
struct direct **names = NIL;
1097
char c,*flags,*date,*s,tmp[MAILTMPLEN];
1101
long i,size,last,nfiles;
1103
/* default stream to prototype */
1104
if (!stream) stream = &mhproto;
1105
/* make sure valid mailbox */
1106
if (!mh_isvalid (mailbox,tmp,NIL)) switch (errno) {
1107
case ENOENT: /* no such file? */
1108
if (!((!compare_cstring (mailbox,MHINBOX) ||
1109
!compare_cstring (mailbox,"INBOX")) &&
1110
(mh_file (tmp,MHINBOX) &&
1111
dummy_create_path (stream,strcat (tmp,"/"),
1112
get_dir_protection (mailbox))))) {
1113
mm_notify (stream,"[TRYCREATE] Must create mailbox before append",NIL);
1117
case 0: /* merely empty file? */
1120
sprintf (tmp,"Invalid MH-format mailbox name: %.80s",mailbox);
1124
sprintf (tmp,"Not a MH-format mailbox: %.80s",mailbox);
1128
/* get first message */
1129
if (!(*af) (stream,data,&flags,&date,&message)) return NIL;
1130
if ((nfiles = scandir (tmp,&names,mh_select,mh_numsort)) > 0) {
1131
/* largest number */
1132
last = atoi (names[nfiles-1]->d_name);
1133
for (i = 0; i < nfiles; ++i) /* free directory */
1134
fs_give ((void **) &names[i]);
1136
else last = 0; /* no messages here yet */
1137
if (s = (void *) names) fs_give ((void **) &s);
1139
mm_critical (stream); /* go critical */
1141
if (!SIZE (message)) { /* guard against zero-length */
1142
mm_log ("Append of zero-length message",ERROR);
1146
if (date) { /* want to preserve date? */
1147
/* yes, parse date into an elt */
1148
if (!mail_parse_date (&elt,date)) {
1149
sprintf (tmp,"Bad date in append: %.80s",date);
1155
mh_file (tmp,mailbox); /* build file name we will use */
1156
sprintf (tmp + strlen (tmp),"/%ld",++last);
1157
if (((fd = open (tmp,O_WRONLY|O_CREAT|O_EXCL,
1158
(int) mail_parameters (NIL,GET_MBXPROTECTION,NIL))) < 0)||
1159
!(df = fdopen (fd,"ab"))) {
1160
sprintf (tmp,"Can't open append message: %s",strerror (errno));
1165
/* copy the data w/o CR's */
1166
for (size = 0,i = SIZE (message); i && ret; --i)
1167
if (((c = SNX (message)) != '\015') && (putc (c,df) == EOF)) ret = NIL;
1168
/* close the file */
1169
if (!ret || fclose (df)) {
1170
unlink (tmp); /* delete message */
1171
sprintf (tmp,"Message append failed: %s",strerror (errno));
1175
if (ret) { /* set the date for this message */
1176
if (date) mh_setdate (tmp,&elt);
1177
/* get next message */
1178
if (!(*af) (stream,data,&flags,&date,&message)) ret = NIL;
1180
} while (ret && message);
1181
mm_nocritical (stream); /* release critical */
1182
if (ret && mail_parameters (NIL,GET_APPENDUID,NIL))
1183
mm_log ("Can not return meaningful APPENDUID with this mailbox format",
1188
/* Internal routines */
1191
/* MH file name selection test
1192
* Accepts: candidate directory entry
1193
* Returns: T to use file name, NIL to skip it
1196
int mh_select (struct direct *name)
1199
char *s = name->d_name;
1200
while (c = *s++) if (!isdigit (c)) return NIL;
1205
/* MH file name comparision
1206
* Accepts: first candidate directory entry
1207
* second candidate directory entry
1208
* Returns: negative if d1 < d2, 0 if d1 == d2, postive if d1 > d2
1211
int mh_numsort (const void *d1,const void *d2)
1213
return atoi ((*(struct direct **) d1)->d_name) -
1214
atoi ((*(struct direct **) d2)->d_name);
1218
/* MH mail build file name
1219
* Accepts: destination string
1221
* Returns: destination
1224
char *mh_file (char *dst,char *name)
1227
char *path = mh_path (dst);
1228
if (!path) fatal ("No mh path in mh_file()!");
1229
/* INBOX becomes "inbox" in the MH path */
1230
if (!compare_cstring (name,MHINBOX) || !compare_cstring (name,"INBOX"))
1231
sprintf (dst,"%.900s/%.80s",path,MHINBOXDIR);
1232
/* #mh names skip past prefix */
1233
else if (*name == '#') sprintf (dst,"%.100s/%.900s",path,name + 4);
1234
else mailboxfile (dst,name); /* all other names */
1235
/* tie off unnecessary trailing / */
1236
if ((s = strrchr (dst,'/')) && !s[1] && (s[-1] == '/')) *s = '\0';
1240
/* MH canonicalize name
1241
* Accepts: buffer to write name
1244
* Returns: T if success, NIL if failure
1247
long mh_canonicalize (char *pattern,char *ref,char *pat)
1250
char *s,tmp[MAILTMPLEN];
1251
if (ref && *ref) { /* have a reference */
1252
strcpy (pattern,ref); /* copy reference to pattern */
1253
/* # overrides mailbox field in reference */
1254
if (*pat == '#') strcpy (pattern,pat);
1255
/* pattern starts, reference ends, with / */
1256
else if ((*pat == '/') && (pattern[strlen (pattern) - 1] == '/'))
1257
strcat (pattern,pat + 1); /* append, omitting one of the period */
1258
else strcat (pattern,pat); /* anything else is just appended */
1260
else strcpy (pattern,pat); /* just have basic name */
1261
if (mh_isvalid (pattern,tmp,T)) {
1262
/* count wildcards */
1263
for (i = 0, s = pattern; *s; *s++) if ((*s == '*') || (*s == '%')) ++i;
1264
/* success if not too many */
1265
if (i <= MAXWILDCARDS) return LONGT;
1266
MM_LOG ("Excessive wildcards in LIST/LSUB",ERROR);
1271
/* Set date for message
1272
* Accepts: file name
1273
* elt containing date
1276
void mh_setdate (char *file,MESSAGECACHE *elt)
1279
tp[0] = time (0); /* atime is now */
1280
tp[1] = mail_longdate (elt); /* modification time */
1281
utime (file,tp); /* set the times */
added
removed
imap/src/osdep/unix/mh.c
