Edit File: mh.c
/* ======================================================================== * Copyright 1988-2007 University of Washington * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * * ======================================================================== */ /* * Program: MH mail routines * * Author(s): Mark Crispin * Networks and Distributed Computing * Computing & Communications * University of Washington * Administration Building, AG-44 * Seattle, WA 98195 * Internet: MRC@CAC.Washington.EDU * * Date: 23 February 1992 * Last Edited: 11 October 2007 */ #include <stdio.h> #include <ctype.h> #include <errno.h> extern int errno; /* just in case */ #include "mail.h" #include "osdep.h" #include <pwd.h> #include <sys/stat.h> #include <sys/time.h> #include "misc.h" #include "dummy.h" #include "fdstring.h" /* Build parameters */ #define MHINBOX "#mhinbox" /* corresponds to namespace in env_unix.c */ #define MHINBOXDIR "inbox" #define MHPROFILE ".mh_profile" #define MHCOMMA ',' #define MHSEQUENCE ".mh_sequence" #define MHSEQUENCES ".mh_sequences" #define MHPATH "Mail" /* mh_load_message() flags */ #define MLM_HEADER 0x1 /* load message text */ #define MLM_TEXT 0x2 /* load message text */ /* MH I/O stream local data */ typedef struct mh_local { char *dir; /* spool directory name */ unsigned char buf[CHUNKSIZE]; /* temporary buffer */ unsigned long cachedtexts; /* total size of all cached texts */ time_t scantime; /* last time directory scanned */ } MHLOCAL; /* Convenient access to local data */ #define LOCAL ((MHLOCAL *) stream->local) /* Function prototypes */ DRIVER *mh_valid (char *name); int mh_isvalid (char *name,char *tmp,long synonly); int mh_namevalid (char *name); char *mh_path (char *tmp); void *mh_parameters (long function,void *value); long mh_dirfmttest (char *name); void mh_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents); void mh_list (MAILSTREAM *stream,char *ref,char *pat); void mh_lsub (MAILSTREAM *stream,char *ref,char *pat); void mh_list_work (MAILSTREAM *stream,char *dir,char *pat,long level); long mh_subscribe (MAILSTREAM *stream,char *mailbox); long mh_unsubscribe (MAILSTREAM *stream,char *mailbox); long mh_create (MAILSTREAM *stream,char *mailbox); long mh_delete (MAILSTREAM *stream,char *mailbox); long mh_rename (MAILSTREAM *stream,char *old,char *newname); MAILSTREAM *mh_open (MAILSTREAM *stream); void mh_close (MAILSTREAM *stream,long options); void mh_fast (MAILSTREAM *stream,char *sequence,long flags); void mh_load_message (MAILSTREAM *stream,unsigned long msgno,long flags); char *mh_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *length, long flags); long mh_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags); long mh_ping (MAILSTREAM *stream); void mh_check (MAILSTREAM *stream); long mh_expunge (MAILSTREAM *stream,char *sequence,long options); long mh_copy (MAILSTREAM *stream,char *sequence,char *mailbox, long options); long mh_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data); int mh_select (struct direct *name); int mh_numsort (const void *d1,const void *d2); char *mh_file (char *dst,char *name); long mh_canonicalize (char *pattern,char *ref,char *pat); void mh_setdate (char *file,MESSAGECACHE *elt); /* MH mail routines */ /* Driver dispatch used by MAIL */ DRIVER mhdriver = { "mh", /* driver name */ /* driver flags */ DR_MAIL|DR_LOCAL|DR_NOFAST|DR_NAMESPACE|DR_NOSTICKY|DR_DIRFMT, (DRIVER *) NIL, /* next driver */ mh_valid, /* mailbox is valid for us */ mh_parameters, /* manipulate parameters */ mh_scan, /* scan mailboxes */ mh_list, /* find mailboxes */ mh_lsub, /* find subscribed mailboxes */ mh_subscribe, /* subscribe to mailbox */ mh_unsubscribe, /* unsubscribe from mailbox */ mh_create, /* create mailbox */ mh_delete, /* delete mailbox */ mh_rename, /* rename mailbox */ mail_status_default, /* status of mailbox */ mh_open, /* open mailbox */ mh_close, /* close mailbox */ mh_fast, /* fetch message "fast" attributes */ NIL, /* fetch message flags */ NIL, /* fetch overview */ NIL, /* fetch message envelopes */ mh_header, /* fetch message header */ mh_text, /* fetch message body */ NIL, /* fetch partial message text */ NIL, /* unique identifier */ NIL, /* message number */ NIL, /* modify flags */ NIL, /* per-message modify flags */ NIL, /* search for message based on criteria */ NIL, /* sort messages */ NIL, /* thread messages */ mh_ping, /* ping mailbox to see if still alive */ mh_check, /* check for new messages */ mh_expunge, /* expunge deleted messages */ mh_copy, /* copy messages to another mailbox */ mh_append, /* append string message to mailbox */ NIL /* garbage collect stream */ }; /* prototype stream */ MAILSTREAM mhproto = {&mhdriver}; static char *mh_profile = NIL; /* holds MH profile */ static char *mh_pathname = NIL; /* holds MH path name */ static long mh_once = 0; /* already snarled once */ static long mh_allow_inbox =NIL;/* allow INBOX as well as MHINBOX */ /* MH mail validate mailbox * Accepts: mailbox name * Returns: our driver if name is valid, NIL otherwise */ DRIVER *mh_valid (char *name) { char tmp[MAILTMPLEN]; return mh_isvalid (name,tmp,T) ? &mhdriver : NIL; } /* MH mail test for valid mailbox * Accepts: mailbox name * temporary buffer to use * syntax only test flag * Returns: T if valid, NIL otherwise */ int mh_isvalid (char *name,char *tmp,long synonly) { struct stat sbuf; char *s,*t,altname[MAILTMPLEN]; unsigned long i; int ret = NIL; errno = NIL; /* zap any error condition */ /* mh name? */ if ((mh_allow_inbox && !compare_cstring (name,"INBOX")) || !compare_cstring (name,MHINBOX) || ((name[0] == '#') && ((name[1] == 'm') || (name[1] == 'M')) && ((name[2] == 'h') || (name[2] == 'H')) && (name[3] == '/') && name[4])){ if (mh_path (tmp)) /* validate name if INBOX or not synonly */ ret = (synonly && compare_cstring (name,"INBOX")) ? T : ((stat (mh_file (tmp,name),&sbuf) == 0) && (sbuf.st_mode & S_IFMT) == S_IFDIR); else if (!mh_once++) { /* only report error once */ sprintf (tmp,"%.900s not found, mh format names disabled",mh_profile); mm_log (tmp,WARN); } } /* see if non-NS name within mh hierarchy */ else if ((name[0] != '#') && (s = mh_path (tmp)) && (i = strlen (s)) && (t = mailboxfile (tmp,name)) && !strncmp (t,s,i) && (tmp[i] == '/') && tmp[i+1]) { sprintf (altname,"#mh%.900s",tmp+i); /* can't do synonly here! */ ret = mh_isvalid (altname,tmp,NIL); } else errno = EINVAL; /* bogus name */ return ret; } /* MH mail test for valid mailbox * Accepts: mailbox name * Returns: T if valid, NIL otherwise */ int mh_namevalid (char *name) { char *s; if (name[0] == '#' && (name[1] == 'm' || name[1] == 'M') && (name[2] == 'h' || name[2] == 'H') && name[3] == '/') for (s = name; s && *s;) { /* make sure no all-digit nodes */ if (isdigit (*s)) s++; /* digit, check this node further... */ else if (*s == '/') break;/* all digit node, barf */ /* non-digit, skip to next node or return */ else if (!((s = strchr (s+1,'/')) && *++s)) return T; } return NIL; /* all numeric or empty node */ } /* Return MH path * Accepts: temporary buffer * Returns: MH path or NIL if MH disabled */ char *mh_path (char *tmp) { char *s,*t,*v,*r; int fd; struct stat sbuf; if (!mh_profile) { /* build mh_profile and mh_pathname now */ sprintf (tmp,"%s/%s",myhomedir (),MHPROFILE); if ((fd = open (mh_profile = cpystr (tmp),O_RDONLY,NIL)) >= 0) { fstat (fd,&sbuf); /* yes, get size and read file */ read (fd,(t = (char *) fs_get (sbuf.st_size + 1)),sbuf.st_size); close (fd); /* don't need the file any more */ t[sbuf.st_size] = '\0'; /* tie it off */ /* parse profile file */ for (s = strtok_r (t,"\r\n",&r); s && *s; s = strtok_r (NIL,"\r\n",&r)) { /* found space in line? */ if (v = strpbrk (s," \t")) { *v++ = '\0'; /* tie off, is keyword "Path:"? */ if (!compare_cstring (s,"Path:")) { /* skip whitespace */ while ((*v == ' ') || (*v == '\t')) ++v; /* absolute path? */ if (*v == '/') s = v; else sprintf (s = tmp,"%s/%s",myhomedir (),v); /* copy name */ mh_pathname = cpystr (s); break; /* don't need to look at rest of file */ } } } fs_give ((void **) &t); /* flush profile text */ if (!mh_pathname) { /* default path if not in the profile */ sprintf (tmp,"%s/%s",myhomedir (),MHPATH); mh_pathname = cpystr (tmp); } } } return mh_pathname; } /* MH manipulate driver parameters * Accepts: function code * function-dependent value * Returns: function-dependent return value */ void *mh_parameters (long function,void *value) { void *ret = NIL; switch ((int) function) { case GET_INBOXPATH: if (value) ret = mh_file ((char *) value,"INBOX"); break; case GET_DIRFMTTEST: ret = (void *) mh_dirfmttest; break; case SET_MHPROFILE: if (mh_profile) fs_give ((void **) &mh_profile); mh_profile = cpystr ((char *) value); case GET_MHPROFILE: ret = (void *) mh_profile; break; case SET_MHPATH: if (mh_pathname) fs_give ((void **) &mh_pathname); mh_pathname = cpystr ((char *) value); case GET_MHPATH: ret = (void *) mh_pathname; break; case SET_MHALLOWINBOX: mh_allow_inbox = value ? T : NIL; case GET_MHALLOWINBOX: ret = (void *) (mh_allow_inbox ? VOIDT : NIL); } return ret; } /* MH test for directory format internal node * Accepts: candidate node name * Returns: T if internal name, NIL otherwise */ long mh_dirfmttest (char *s) { int c; /* sequence(s) file is an internal name */ if (strcmp (s,MHSEQUENCE) && strcmp (s,MHSEQUENCES)) { if (*s == MHCOMMA) ++s; /* else comma + all numeric name */ /* success if all-numeric */ while (c = *s++) if (!isdigit (c)) return NIL; } return LONGT; } /* MH scan mailboxes * Accepts: mail stream * reference * pattern to search * string to scan */ void mh_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents) { char *s,test[MAILTMPLEN],file[MAILTMPLEN]; long i = 0; if (!pat || !*pat) { /* empty pattern? */ if (mh_canonicalize (test,ref,"*")) { /* tie off name at root */ if (s = strchr (test,'/')) *++s = '\0'; else test[0] = '\0'; mm_list (stream,'/',test,LATT_NOSELECT); } } /* get canonical form of name */ else if (mh_canonicalize (test,ref,pat)) { if (contents) { /* maybe I'll implement this someday */ mm_log ("Scan not valid for mh mailboxes",ERROR); return; } if (test[3] == '/') { /* looking down levels? */ /* yes, found any wildcards? */ if (s = strpbrk (test,"%*")) { /* yes, copy name up to that point */ strncpy (file,test+4,i = s - (test+4)); file[i] = '\0'; /* tie off */ } else strcpy (file,test+4);/* use just that name then */ /* find directory name */ if (s = strrchr (file,'/')) { *s = '\0'; /* found, tie off at that point */ s = file; } /* do the work */ mh_list_work (stream,s,test,0); } /* always an INBOX */ if (!compare_cstring (test,MHINBOX)) mm_list (stream,NIL,MHINBOX,LATT_NOINFERIORS); } } /* MH list mailboxes * Accepts: mail stream * reference * pattern to search */ void mh_list (MAILSTREAM *stream,char *ref,char *pat) { mh_scan (stream,ref,pat,NIL); } /* MH list subscribed mailboxes * Accepts: mail stream * reference * pattern to search */ void mh_lsub (MAILSTREAM *stream,char *ref,char *pat) { void *sdb = NIL; char *s,test[MAILTMPLEN]; /* get canonical form of name */ if (mh_canonicalize (test,ref,pat) && (s = sm_read (&sdb))) { do if (pmatch_full (s,test,'/')) mm_lsub (stream,'/',s,NIL); while (s = sm_read (&sdb)); /* until no more subscriptions */ } } /* MH list mailboxes worker routine * Accepts: mail stream * directory name to search * search pattern * search level */ void mh_list_work (MAILSTREAM *stream,char *dir,char *pat,long level) { DIR *dp; struct direct *d; struct stat sbuf; char *cp,*np,curdir[MAILTMPLEN],name[MAILTMPLEN]; /* build MH name to search */ if (dir) sprintf (name,"#mh/%s/",dir); else strcpy (name,"#mh/"); /* make directory name, punt if bogus */ if (!mh_file (curdir,name)) return; cp = curdir + strlen (curdir);/* end of directory name */ np = name + strlen (name); /* end of MH name */ if (dp = opendir (curdir)) { /* open directory */ while (d = readdir (dp)) /* scan, ignore . and numeric names */ if ((d->d_name[0] != '.') && !mh_select (d)) { strcpy (cp,d->d_name); /* make directory name */ if (!stat (curdir,&sbuf) && ((sbuf.st_mode & S_IFMT) == S_IFDIR)) { strcpy (np,d->d_name);/* make mh name of directory name */ /* yes, an MH name if full match */ if (pmatch_full (name,pat,'/')) mm_list (stream,'/',name,NIL); /* check if should recurse */ if (dmatch (name,pat,'/') && (level < (long) mail_parameters (NIL,GET_LISTMAXLEVEL,NIL))) mh_list_work (stream,name+4,pat,level+1); } } closedir (dp); /* all done, flush directory */ } } /* MH mail subscribe to mailbox * Accepts: mail stream * mailbox to add to subscription list * Returns: T on success, NIL on failure */ long mh_subscribe (MAILSTREAM *stream,char *mailbox) { return sm_subscribe (mailbox); } /* MH mail unsubscribe to mailbox * Accepts: mail stream * mailbox to delete from subscription list * Returns: T on success, NIL on failure */ long mh_unsubscribe (MAILSTREAM *stream,char *mailbox) { return sm_unsubscribe (mailbox); } /* MH mail create mailbox * Accepts: mail stream * mailbox name to create * Returns: T on success, NIL on failure */ long mh_create (MAILSTREAM *stream,char *mailbox) { char tmp[MAILTMPLEN]; if (!mh_namevalid (mailbox)) /* validate name */ sprintf (tmp,"Can't create mailbox %.80s: invalid MH-format name",mailbox); /* must not already exist */ else if (mh_isvalid (mailbox,tmp,NIL)) sprintf (tmp,"Can't create mailbox %.80s: mailbox already exists",mailbox); else if (!mh_path (tmp)) return NIL; /* try to make it */ else if (!(mh_file (tmp,mailbox) && dummy_create_path (stream,strcat (tmp,"/"), get_dir_protection (mailbox)))) sprintf (tmp,"Can't create mailbox %.80s: %s",mailbox,strerror (errno)); else return LONGT; /* success */ mm_log (tmp,ERROR); return NIL; } /* MH mail delete mailbox * mailbox name to delete * Returns: T on success, NIL on failure */ long mh_delete (MAILSTREAM *stream,char *mailbox) { DIR *dirp; struct direct *d; int i; char tmp[MAILTMPLEN]; /* is mailbox valid? */ if (!mh_isvalid (mailbox,tmp,NIL)) { sprintf (tmp,"Can't delete mailbox %.80s: no such mailbox",mailbox); mm_log (tmp,ERROR); return NIL; } /* get name of directory */ i = strlen (mh_file (tmp,mailbox)); if (dirp = opendir (tmp)) { /* open directory */ tmp[i++] = '/'; /* now apply trailing delimiter */ /* massacre all mh owned files */ while (d = readdir (dirp)) if (mh_dirfmttest (d->d_name)) { strcpy (tmp + i,d->d_name); unlink (tmp); /* sayonara */ } closedir (dirp); /* flush directory */ } /* try to remove the directory */ if (rmdir (mh_file (tmp,mailbox))) { sprintf (tmp,"Can't delete mailbox %.80s: %s",mailbox,strerror (errno)); mm_log (tmp,WARN); } return T; /* return success */ } /* MH mail rename mailbox * Accepts: MH mail stream * old mailbox name * new mailbox name * Returns: T on success, NIL on failure */ long mh_rename (MAILSTREAM *stream,char *old,char *newname) { char c,*s,tmp[MAILTMPLEN],tmp1[MAILTMPLEN]; struct stat sbuf; /* old mailbox name must be valid */ if (!mh_isvalid (old,tmp,NIL)) sprintf (tmp,"Can't rename mailbox %.80s: no such mailbox",old); else if (!mh_namevalid (newname)) sprintf (tmp,"Can't rename to mailbox %.80s: invalid MH-format name", newname); /* new mailbox name must not be valid */ else if (mh_isvalid (newname,tmp,NIL)) sprintf (tmp,"Can't rename to mailbox %.80s: destination already exists", newname); /* success if can rename the directory */ else { /* found superior to destination name? */ if (s = strrchr (mh_file (tmp1,newname),'/')) { c = *++s; /* remember first character of inferior */ *s = '\0'; /* tie off to get just superior */ /* name doesn't exist, create it */ if ((stat (tmp1,&sbuf) || ((sbuf.st_mode & S_IFMT) != S_IFDIR)) && !dummy_create_path (stream,tmp1,get_dir_protection (newname))) return NIL; *s = c; /* restore full name */ } if (!rename (mh_file (tmp,old),tmp1)) return T; sprintf (tmp,"Can't rename mailbox %.80s to %.80s: %s", old,newname,strerror (errno)); } mm_log (tmp,ERROR); /* something failed */ return NIL; } /* MH mail open * Accepts: stream to open * Returns: stream on success, NIL on failure */ MAILSTREAM *mh_open (MAILSTREAM *stream) { char tmp[MAILTMPLEN]; if (!stream) return &mhproto; /* return prototype for OP_PROTOTYPE call */ if (stream->local) fatal ("mh recycle stream"); stream->local = fs_get (sizeof (MHLOCAL)); /* INBOXness is one of the following: * #mhinbox (case-independent) * #mh/inbox (mh is case-independent, inbox is case-dependent) * INBOX (case-independent */ stream->inbox = /* note if an INBOX or not */ (!compare_cstring (stream->mailbox,MHINBOX) || ((stream->mailbox[0] == '#') && ((stream->mailbox[1] == 'm') || (stream->mailbox[1] == 'M')) && ((stream->mailbox[2] == 'h') || (stream->mailbox[2] == 'H')) && (stream->mailbox[3] == '/') && !strcmp (stream->mailbox+4,MHINBOXDIR)) || !compare_cstring (stream->mailbox,"INBOX")) ? T : NIL; mh_file (tmp,stream->mailbox);/* get directory name */ LOCAL->dir = cpystr (tmp); /* copy directory name for later */ LOCAL->scantime = 0; /* not scanned yet */ LOCAL->cachedtexts = 0; /* no cached texts */ stream->sequence++; /* bump sequence number */ /* parse mailbox */ stream->nmsgs = stream->recent = 0; if (!mh_ping (stream)) return NIL; if (!(stream->nmsgs || stream->silent)) mm_log ("Mailbox is empty",(long) NIL); return stream; /* return stream to caller */ } /* MH mail close * Accepts: MAIL stream * close options */ void mh_close (MAILSTREAM *stream,long options) { if (LOCAL) { /* only if a file is open */ int silent = stream->silent; stream->silent = T; /* note this stream is dying */ if (options & CL_EXPUNGE) mh_expunge (stream,NIL,NIL); if (LOCAL->dir) fs_give ((void **) &LOCAL->dir); /* nuke the local data */ fs_give ((void **) &stream->local); stream->dtb = NIL; /* log out the DTB */ stream->silent = silent; /* reset silent state */ } } /* MH mail fetch fast information * Accepts: MAIL stream * sequence * option flags */ void mh_fast (MAILSTREAM *stream,char *sequence,long flags) { MESSAGECACHE *elt; unsigned long i; /* set up metadata for all messages */ if (stream && LOCAL && ((flags & FT_UID) ? mail_uid_sequence (stream,sequence) : mail_sequence (stream,sequence))) for (i = 1; i <= stream->nmsgs; i++) if ((elt = mail_elt (stream,i))->sequence && !(elt->day && elt->rfc822_size)) mh_load_message (stream,i,NIL); } /* MH load message into cache * Accepts: MAIL stream * message # * option flags */ void mh_load_message (MAILSTREAM *stream,unsigned long msgno,long flags) { unsigned long i,j,nlseen; int fd; unsigned char c,*t; struct stat sbuf; MESSAGECACHE *elt; FDDATA d; STRING bs; elt = mail_elt (stream,msgno);/* get elt */ /* build message file name */ sprintf (LOCAL->buf,"%s/%lu",LOCAL->dir,elt->private.uid); /* anything we need not currently cached? */ if ((!elt->day || !elt->rfc822_size || ((flags & MLM_HEADER) && !elt->private.msg.header.text.data) || ((flags & MLM_TEXT) && !elt->private.msg.text.text.data)) && ((fd = open (LOCAL->buf,O_RDONLY,NIL)) >= 0)) { fstat (fd,&sbuf); /* get file metadata */ d.fd = fd; /* set up file descriptor */ d.pos = 0; /* start of file */ d.chunk = LOCAL->buf; d.chunksize = CHUNKSIZE; INIT (&bs,fd_string,&d,sbuf.st_size); if (!elt->day) { /* set internaldate to file date */ struct tm *tm = gmtime (&sbuf.st_mtime); elt->day = tm->tm_mday; elt->month = tm->tm_mon + 1; elt->year = tm->tm_year + 1900 - BASEYEAR; elt->hours = tm->tm_hour; elt->minutes = tm->tm_min; elt->seconds = tm->tm_sec; elt->zhours = 0; elt->zminutes = 0; } if (!elt->rfc822_size) { /* know message size yet? */ for (i = 0, j = SIZE (&bs), nlseen = 0; j--; ) switch (SNX (&bs)) { case '\015': /* unlikely carriage return */ if (!j || (CHR (&bs) != '\012')) { i++; /* ugh, raw CR */ nlseen = NIL; break; } SNX (&bs); /* eat the line feed, drop in */ --j; case '\012': /* line feed? */ i += 2; /* count a CRLF */ /* header size known yet? */ if (!elt->private.msg.header.text.size && nlseen) { /* note position in file */ elt->private.special.text.size = GETPOS (&bs); /* and CRLF-adjusted size */ elt->private.msg.header.text.size = i; } nlseen = T; /* note newline seen */ break; default: /* ordinary chararacter */ i++; nlseen = NIL; break; } SETPOS (&bs,0); /* restore old position */ elt->rfc822_size = i; /* note that we have size now */ /* header is entire message if no delimiter */ if (!elt->private.msg.header.text.size) elt->private.msg.header.text.size = elt->rfc822_size; /* text is remainder of message */ elt->private.msg.text.text.size = elt->rfc822_size - elt->private.msg.header.text.size; } /* need to load cache with message data? */ if (((flags & MLM_HEADER) && !elt->private.msg.header.text.data) || ((flags & MLM_TEXT) && !elt->private.msg.text.text.data)) { /* purge cache if too big */ if (LOCAL->cachedtexts > max (stream->nmsgs * 4096,2097152)) { /* just can't keep that much */ mail_gc (stream,GC_TEXTS); LOCAL->cachedtexts = 0; } if ((flags & MLM_HEADER) && !elt->private.msg.header.text.data) { t = elt->private.msg.header.text.data = (unsigned char *) fs_get (elt->private.msg.header.text.size + 1); LOCAL->cachedtexts += elt->private.msg.header.text.size; /* read in message header */ for (i = 0; i < elt->private.msg.header.text.size; i++) switch (c = SNX (&bs)) { case '\015': /* unlikely carriage return */ *t++ = c; if ((CHR (&bs) == '\012')) { *t++ = SNX (&bs); i++; } break; case '\012': /* line feed? */ *t++ = '\015'; i++; default: *t++ = c; break; } *t = '\0'; /* tie off string */ if ((t - elt->private.msg.header.text.data) != elt->private.msg.header.text.size) fatal ("mh hdr size mismatch"); } if ((flags & MLM_TEXT) && !elt->private.msg.text.text.data) { t = elt->private.msg.text.text.data = (unsigned char *) fs_get (elt->private.msg.text.text.size + 1); SETPOS (&bs,elt->private.special.text.size); LOCAL->cachedtexts += elt->private.msg.text.text.size; /* read in message text */ for (i = 0; i < elt->private.msg.text.text.size; i++) switch (c = SNX (&bs)) { case '\015': /* unlikely carriage return */ *t++ = c; if ((CHR (&bs) == '\012')) { *t++ = SNX (&bs); i++; } break; case '\012': /* line feed? */ *t++ = '\015'; i++; default: *t++ = c; break; } *t = '\0'; /* tie off string */ if ((t - elt->private.msg.text.text.data) != elt->private.msg.text.text.size) fatal ("mh txt size mismatch"); } } close (fd); /* flush message file */ } } /* MH mail fetch message header * Accepts: MAIL stream * message # to fetch * pointer to returned header text length * option flags * Returns: message header in RFC822 format */ char *mh_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *length, long flags) { MESSAGECACHE *elt; *length = 0; /* default to empty */ if (flags & FT_UID) return "";/* UID call "impossible" */ elt = mail_elt (stream,msgno);/* get elt */ if (!elt->private.msg.header.text.data) mh_load_message (stream,msgno,MLM_HEADER); *length = elt->private.msg.header.text.size; return (char *) elt->private.msg.header.text.data; } /* MH mail fetch message text (body only) * Accepts: MAIL stream * message # to fetch * pointer to returned stringstruct * option flags * Returns: T on success, NIL on failure */ long mh_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags) { MESSAGECACHE *elt; /* UID call "impossible" */ if (flags & FT_UID) return NIL; elt = mail_elt (stream,msgno);/* get elt */ /* snarf message if don't have it yet */ if (!elt->private.msg.text.text.data) { mh_load_message (stream,msgno,MLM_TEXT); if (!elt->private.msg.text.text.data) return NIL; } if (!(flags & FT_PEEK)) { /* mark as seen */ mail_elt (stream,msgno)->seen = T; mm_flags (stream,msgno); } INIT (bs,mail_string,elt->private.msg.text.text.data, elt->private.msg.text.text.size); return T; } /* MH mail ping mailbox * Accepts: MAIL stream * Returns: T if stream alive, else NIL */ long mh_ping (MAILSTREAM *stream) { MAILSTREAM *sysibx = NIL; MESSAGECACHE *elt,*selt; struct stat sbuf; char *s,tmp[MAILTMPLEN]; int fd; unsigned long i,j,r; unsigned long old = stream->uid_last; long nmsgs = stream->nmsgs; long recent = stream->recent; int silent = stream->silent; if (stat (LOCAL->dir,&sbuf)) {/* directory exists? */ if (stream->inbox && /* no, create if INBOX */ dummy_create_path (stream,strcat (mh_file (tmp,MHINBOX),"/"), get_dir_protection ("INBOX"))) return T; sprintf (tmp,"Can't open mailbox %.80s: no such mailbox",stream->mailbox); mm_log (tmp,ERROR); return NIL; } stream->silent = T; /* don't pass up mm_exists() events yet */ if (sbuf.st_ctime != LOCAL->scantime) { struct direct **names = NIL; long nfiles = scandir (LOCAL->dir,&names,mh_select,mh_numsort); if (nfiles < 0) nfiles = 0; /* in case error */ /* note scanned now */ LOCAL->scantime = sbuf.st_ctime; /* scan directory */ for (i = 0; i < nfiles; ++i) { /* if newly seen, add to list */ if ((j = atoi (names[i]->d_name)) > old) { mail_exists (stream,++nmsgs); stream->uid_last = (elt = mail_elt (stream,nmsgs))->private.uid = j; elt->valid = T; /* note valid flags */ if (old) { /* other than the first pass? */ elt->recent = T; /* yup, mark as recent */ recent++; /* bump recent count */ } else { /* see if already read */ sprintf (tmp,"%s/%s",LOCAL->dir,names[i]->d_name); if (!stat (tmp,&sbuf) && (sbuf.st_atime > sbuf.st_mtime)) elt->seen = T; } } fs_give ((void **) &names[i]); } /* free directory */ if (s = (void *) names) fs_give ((void **) &s); } /* if INBOX, snarf from system INBOX */ if (stream->inbox && strcmp (sysinbox (),stream->mailbox)) { old = stream->uid_last; mm_critical (stream); /* go critical */ /* see if anything in system inbox */ if (!stat (sysinbox (),&sbuf) && sbuf.st_size && (sysibx = mail_open (sysibx,sysinbox (),OP_SILENT)) && !sysibx->rdonly && (r = sysibx->nmsgs)) { for (i = 1; i <= r; ++i) {/* for each message in sysinbox mailbox */ /* build file name we will use */ sprintf (LOCAL->buf,"%s/%lu",LOCAL->dir,++old); /* snarf message from Berkeley mailbox */ selt = mail_elt (sysibx,i); if (((fd = open (LOCAL->buf,O_WRONLY|O_CREAT|O_EXCL, (long) mail_parameters (NIL,GET_MBXPROTECTION,NIL))) >= 0) && (s = mail_fetchheader_full (sysibx,i,NIL,&j,FT_INTERNAL)) && (write (fd,s,j) == j) && (s = mail_fetchtext_full (sysibx,i,&j,FT_INTERNAL|FT_PEEK)) && (write (fd,s,j) == j) && !fsync (fd) && !close (fd)) { /* swell the cache */ mail_exists (stream,++nmsgs); stream->uid_last = /* create new elt, note its file number */ (elt = mail_elt (stream,nmsgs))->private.uid = old; recent++; /* bump recent count */ /* set up initial flags and date */ elt->valid = elt->recent = T; elt->seen = selt->seen; elt->deleted = selt->deleted; elt->flagged = selt->flagged; elt->answered = selt->answered; elt->draft = selt->draft; elt->day = selt->day;elt->month = selt->month;elt->year = selt->year; elt->hours = selt->hours;elt->minutes = selt->minutes; elt->seconds = selt->seconds; elt->zhours = selt->zhours; elt->zminutes = selt->zminutes; elt->zoccident = selt->zoccident; mh_setdate (LOCAL->buf,elt); sprintf (tmp,"%lu",i);/* delete it from the sysinbox */ mail_flag (sysibx,tmp,"\\Deleted",ST_SET); } else { /* failed to snarf */ if (fd) { /* did it ever get opened? */ close (fd); /* close descriptor */ unlink (LOCAL->buf);/* flush this file */ } sprintf (tmp,"Message copy to MH mailbox failed: %.80s", s,strerror (errno)); mm_log (tmp,ERROR); r = 0; /* stop the snarf in its tracks */ } } /* update scan time */ if (!stat (LOCAL->dir,&sbuf)) LOCAL->scantime = sbuf.st_ctime; mail_expunge (sysibx); /* now expunge all those messages */ } if (sysibx) mail_close (sysibx); mm_nocritical (stream); /* release critical */ } stream->silent = silent; /* can pass up events now */ mail_exists (stream,nmsgs); /* notify upper level of mailbox size */ mail_recent (stream,recent); return T; /* return that we are alive */ } /* MH mail check mailbox * Accepts: MAIL stream */ void mh_check (MAILSTREAM *stream) { /* Perhaps in the future this will preserve flags */ if (mh_ping (stream)) mm_log ("Check completed",(long) NIL); } /* MH mail expunge mailbox * Accepts: MAIL stream * sequence to expunge if non-NIL * expunge options * Returns: T, always */ long mh_expunge (MAILSTREAM *stream,char *sequence,long options) { long ret; MESSAGECACHE *elt; unsigned long i = 1; unsigned long n = 0; unsigned long recent = stream->recent; if (ret = sequence ? ((options & EX_UID) ? mail_uid_sequence (stream,sequence) : mail_sequence (stream,sequence)) : LONGT) { mm_critical (stream); /* go critical */ while (i <= stream->nmsgs) {/* for each message */ elt = mail_elt (stream,i);/* if deleted, need to trash it */ if (elt->deleted && (sequence ? elt->sequence : T)) { sprintf (LOCAL->buf,"%s/%lu",LOCAL->dir,elt->private.uid); if (unlink (LOCAL->buf)) {/* try to delete the message */ sprintf (LOCAL->buf,"Expunge of message %lu failed, aborted: %s",i, strerror (errno)); mm_log (LOCAL->buf,(long) NIL); break; } /* note uncached */ LOCAL->cachedtexts -= ((elt->private.msg.header.text.data ? elt->private.msg.header.text.size : 0) + (elt->private.msg.text.text.data ? elt->private.msg.text.text.size : 0)); mail_gc_msg (&elt->private.msg,GC_ENV | GC_TEXTS); /* if recent, note one less recent message */ if (elt->recent) --recent; /* notify upper levels */ mail_expunged (stream,i); n++; /* count up one more expunged message */ } else i++; /* otherwise try next message */ } if (n) { /* output the news if any expunged */ sprintf (LOCAL->buf,"Expunged %lu messages",n); mm_log (LOCAL->buf,(long) NIL); } else mm_log ("No messages deleted, so no update needed",(long) NIL); mm_nocritical (stream); /* release critical */ /* notify upper level of new mailbox size */ mail_exists (stream,stream->nmsgs); mail_recent (stream,recent); } return ret; } /* MH mail copy message(s) * Accepts: MAIL stream * sequence * destination mailbox * copy options * Returns: T if copy successful, else NIL */ long mh_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options) { FDDATA d; STRING st; MESSAGECACHE *elt; struct stat sbuf; int fd; unsigned long i; char flags[MAILTMPLEN],date[MAILTMPLEN]; appenduid_t au = (appenduid_t) mail_parameters (NIL,GET_APPENDUID,NIL); long ret = NIL; /* copy the messages */ if ((options & CP_UID) ? mail_uid_sequence (stream,sequence) : mail_sequence (stream,sequence)) for (i = 1; i <= stream->nmsgs; i++) if ((elt = mail_elt (stream,i))->sequence) { sprintf (LOCAL->buf,"%s/%lu",LOCAL->dir,elt->private.uid); if ((fd = open (LOCAL->buf,O_RDONLY,NIL)) < 0) return NIL; fstat (fd,&sbuf); /* get size of message */ if (!elt->day) { /* set internaldate to file date if needed */ struct tm *tm = gmtime (&sbuf.st_mtime); elt->day = tm->tm_mday; elt->month = tm->tm_mon + 1; elt->year = tm->tm_year + 1900 - BASEYEAR; elt->hours = tm->tm_hour; elt->minutes = tm->tm_min; elt->seconds = tm->tm_sec; elt->zhours = 0; elt->zminutes = 0; } d.fd = fd; /* set up file descriptor */ d.pos = 0; /* start of file */ d.chunk = LOCAL->buf; d.chunksize = CHUNKSIZE; /* kludge; mh_append would just strip CRs */ INIT (&st,fd_string,&d,sbuf.st_size); /* init flag string */ flags[0] = flags[1] = '\0'; if (elt->seen) strcat (flags," \\Seen"); if (elt->deleted) strcat (flags," \\Deleted"); if (elt->flagged) strcat (flags," \\Flagged"); if (elt->answered) strcat (flags," \\Answered"); if (elt->draft) strcat (flags," \\Draft"); flags[0] = '('; /* open list */ strcat (flags,")"); /* close list */ mail_date (date,elt); /* generate internal date */ if (au) mail_parameters (NIL,SET_APPENDUID,NIL); if ((ret = mail_append_full (NIL,mailbox,flags,date,&st)) && (options & CP_MOVE)) elt->deleted = T; if (au) mail_parameters (NIL,SET_APPENDUID,(void *) au); close (fd); } if (ret && mail_parameters (NIL,GET_COPYUID,NIL)) mm_log ("Can not return meaningful COPYUID with this mailbox format",WARN); return ret; /* return success */ } /* MH mail append message from stringstruct * Accepts: MAIL stream * destination mailbox * append callback * data for callback * Returns: T if append successful, else NIL */ long mh_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data) { struct direct **names = NIL; int fd; char c,*flags,*date,*s,tmp[MAILTMPLEN]; STRING *message; MESSAGECACHE elt; FILE *df; long i,size,last,nfiles; long ret = LONGT; /* default stream to prototype */ if (!stream) stream = &mhproto; /* make sure valid mailbox */ if (!mh_isvalid (mailbox,tmp,NIL)) switch (errno) { case ENOENT: /* no such file? */ if (!((!compare_cstring (mailbox,MHINBOX) || !compare_cstring (mailbox,"INBOX")) && (mh_file (tmp,MHINBOX) && dummy_create_path (stream,strcat (tmp,"/"), get_dir_protection (mailbox))))) { mm_notify (stream,"[TRYCREATE] Must create mailbox before append",NIL); return NIL; } /* falls through */ case 0: /* merely empty file? */ break; case EINVAL: sprintf (tmp,"Invalid MH-format mailbox name: %.80s",mailbox); mm_log (tmp,ERROR); return NIL; default: sprintf (tmp,"Not a MH-format mailbox: %.80s",mailbox); mm_log (tmp,ERROR); return NIL; } /* get first message */ if (!(*af) (stream,data,&flags,&date,&message)) return NIL; if ((nfiles = scandir (tmp,&names,mh_select,mh_numsort)) > 0) { /* largest number */ last = atoi (names[nfiles-1]->d_name); for (i = 0; i < nfiles; ++i) /* free directory */ fs_give ((void **) &names[i]); } else last = 0; /* no messages here yet */ if (s = (void *) names) fs_give ((void **) &s); mm_critical (stream); /* go critical */ do { if (!SIZE (message)) { /* guard against zero-length */ mm_log ("Append of zero-length message",ERROR); ret = NIL; break; } if (date) { /* want to preserve date? */ /* yes, parse date into an elt */ if (!mail_parse_date (&elt,date)) { sprintf (tmp,"Bad date in append: %.80s",date); mm_log (tmp,ERROR); ret = NIL; break; } } mh_file (tmp,mailbox); /* build file name we will use */ sprintf (tmp + strlen (tmp),"/%ld",++last); if (((fd = open (tmp,O_WRONLY|O_CREAT|O_EXCL, (long)mail_parameters (NIL,GET_MBXPROTECTION,NIL))) < 0)|| !(df = fdopen (fd,"ab"))) { sprintf (tmp,"Can't open append message: %s",strerror (errno)); mm_log (tmp,ERROR); ret = NIL; break; } /* copy the data w/o CR's */ for (size = 0,i = SIZE (message); i && ret; --i) if (((c = SNX (message)) != '\015') && (putc (c,df) == EOF)) ret = NIL; /* close the file */ if (!ret || fclose (df)) { unlink (tmp); /* delete message */ sprintf (tmp,"Message append failed: %s",strerror (errno)); mm_log (tmp,ERROR); ret = NIL; } if (ret) { /* set the date for this message */ if (date) mh_setdate (tmp,&elt); /* get next message */ if (!(*af) (stream,data,&flags,&date,&message)) ret = NIL; } } while (ret && message); mm_nocritical (stream); /* release critical */ if (ret && mail_parameters (NIL,GET_APPENDUID,NIL)) mm_log ("Can not return meaningful APPENDUID with this mailbox format", WARN); return ret; } /* Internal routines */ /* MH file name selection test * Accepts: candidate directory entry * Returns: T to use file name, NIL to skip it */ int mh_select (struct direct *name) { char c; char *s = name->d_name; while (c = *s++) if (!isdigit (c)) return NIL; return T; } /* MH file name comparision * Accepts: first candidate directory entry * second candidate directory entry * Returns: negative if d1 < d2, 0 if d1 == d2, postive if d1 > d2 */ int mh_numsort (const void *d1,const void *d2) { return atoi ((*(struct direct **) d1)->d_name) - atoi ((*(struct direct **) d2)->d_name); } /* MH mail build file name * Accepts: destination string * source * Returns: destination */ char *mh_file (char *dst,char *name) { char *s; char *path = mh_path (dst); if (!path) fatal ("No mh path in mh_file()!"); /* INBOX becomes "inbox" in the MH path */ if (!compare_cstring (name,MHINBOX) || !compare_cstring (name,"INBOX")) sprintf (dst,"%.900s/%.80s",path,MHINBOXDIR); /* #mh names skip past prefix */ else if (*name == '#') sprintf (dst,"%.100s/%.900s",path,name + 4); else mailboxfile (dst,name); /* all other names */ /* tie off unnecessary trailing / */ if ((s = strrchr (dst,'/')) && !s[1] && (s[-1] == '/')) *s = '\0'; return dst; } /* MH canonicalize name * Accepts: buffer to write name * reference * pattern * Returns: T if success, NIL if failure */ long mh_canonicalize (char *pattern,char *ref,char *pat) { unsigned long i; char *s,tmp[MAILTMPLEN]; if (ref && *ref) { /* have a reference */ strcpy (pattern,ref); /* copy reference to pattern */ /* # overrides mailbox field in reference */ if (*pat == '#') strcpy (pattern,pat); /* pattern starts, reference ends, with / */ else if ((*pat == '/') && (pattern[strlen (pattern) - 1] == '/')) strcat (pattern,pat + 1); /* append, omitting one of the period */ else strcat (pattern,pat); /* anything else is just appended */ } else strcpy (pattern,pat); /* just have basic name */ if (mh_isvalid (pattern,tmp,T)) { /* count wildcards */ for (i = 0, s = pattern; *s; *s++) if ((*s == '*') || (*s == '%')) ++i; /* success if not too many */ if (i <= MAXWILDCARDS) return LONGT; mm_log ("Excessive wildcards in LIST/LSUB",ERROR); } return NIL; } /* Set date for message * Accepts: file name * elt containing date */ void mh_setdate (char *file,MESSAGECACHE *elt) { time_t tp[2]; tp[0] = time (0); /* atime is now */ tp[1] = mail_longdate (elt); /* modification time */ utime (file,tp); /* set the times */ }