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author | Eduardo Chappa <echappa@gmx.com> | 2013-02-03 00:59:38 -0700 |
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committer | Eduardo Chappa <echappa@gmx.com> | 2013-02-03 00:59:38 -0700 |
commit | 094ca96844842928810f14844413109fc6cdd890 (patch) | |
tree | e60efbb980f38ba9308ccb4fb2b77b87bbc115f3 /imap/src/osdep/amiga/mx.c | |
download | alpine-094ca96844842928810f14844413109fc6cdd890.tar.xz |
Initial Alpine Version
Diffstat (limited to 'imap/src/osdep/amiga/mx.c')
-rw-r--r-- | imap/src/osdep/amiga/mx.c | 1287 |
1 files changed, 1287 insertions, 0 deletions
diff --git a/imap/src/osdep/amiga/mx.c b/imap/src/osdep/amiga/mx.c new file mode 100644 index 00000000..45495279 --- /dev/null +++ b/imap/src/osdep/amiga/mx.c @@ -0,0 +1,1287 @@ +/* ======================================================================== + * Copyright 1988-2008 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: MX 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: 3 May 1996 + * Last Edited: 6 January 2008 + */ + + +#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" + +/* Index file */ + +#define MXINDEXNAME "/.mxindex" +#define MXINDEX(d,s) strcat (mx_file (d,s),MXINDEXNAME) + + +/* MX I/O stream local data */ + +typedef struct mx_local { + int fd; /* file descriptor of open index */ + unsigned char *buf; /* temporary buffer */ + unsigned long buflen; /* current size of temporary buffer */ + unsigned long cachedtexts; /* total size of all cached texts */ + time_t scantime; /* last time directory scanned */ +} MXLOCAL; + + +/* Convenient access to local data */ + +#define LOCAL ((MXLOCAL *) stream->local) + + +/* Function prototypes */ + +DRIVER *mx_valid (char *name); +int mx_isvalid (char *name,char *tmp); +int mx_namevalid (char *name); +void *mx_parameters (long function,void *value); +long mx_dirfmttest (char *name); +void mx_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents); +long mx_scan_contents (char *name,char *contents,unsigned long csiz, + unsigned long fsiz); +void mx_list (MAILSTREAM *stream,char *ref,char *pat); +void mx_lsub (MAILSTREAM *stream,char *ref,char *pat); +long mx_subscribe (MAILSTREAM *stream,char *mailbox); +long mx_unsubscribe (MAILSTREAM *stream,char *mailbox); +long mx_create (MAILSTREAM *stream,char *mailbox); +long mx_delete (MAILSTREAM *stream,char *mailbox); +long mx_rename (MAILSTREAM *stream,char *old,char *newname); +int mx_rename_work (char *src,size_t srcl,char *dst,size_t dstl,char *name); +MAILSTREAM *mx_open (MAILSTREAM *stream); +void mx_close (MAILSTREAM *stream,long options); +void mx_fast (MAILSTREAM *stream,char *sequence,long flags); +char *mx_fast_work (MAILSTREAM *stream,MESSAGECACHE *elt); +char *mx_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *length, + long flags); +long mx_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags); +void mx_flag (MAILSTREAM *stream,char *sequence,char *flag,long flags); +void mx_flagmsg (MAILSTREAM *stream,MESSAGECACHE *elt); +long mx_ping (MAILSTREAM *stream); +void mx_check (MAILSTREAM *stream); +long mx_expunge (MAILSTREAM *stream,char *sequence,long options); +long mx_copy (MAILSTREAM *stream,char *sequence,char *mailbox, + long options); +long mx_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data); +long mx_append_msg (MAILSTREAM *stream,char *flags,MESSAGECACHE *elt, + STRING *st,SEARCHSET *set); + +int mx_select (struct direct *name); +int mx_numsort (const void *d1,const void *d2); +char *mx_file (char *dst,char *name); +long mx_lockindex (MAILSTREAM *stream); +void mx_unlockindex (MAILSTREAM *stream); +void mx_setdate (char *file,MESSAGECACHE *elt); + + +/* MX mail routines */ + + +/* Driver dispatch used by MAIL */ + +DRIVER mxdriver = { + "mx", /* driver name */ + /* driver flags */ + DR_MAIL|DR_LOCAL|DR_NOFAST|DR_CRLF|DR_LOCKING|DR_DIRFMT, + (DRIVER *) NIL, /* next driver */ + mx_valid, /* mailbox is valid for us */ + mx_parameters, /* manipulate parameters */ + mx_scan, /* scan mailboxes */ + mx_list, /* find mailboxes */ + mx_lsub, /* find subscribed mailboxes */ + mx_subscribe, /* subscribe to mailbox */ + mx_unsubscribe, /* unsubscribe from mailbox */ + mx_create, /* create mailbox */ + mx_delete, /* delete mailbox */ + mx_rename, /* rename mailbox */ + mail_status_default, /* status of mailbox */ + mx_open, /* open mailbox */ + mx_close, /* close mailbox */ + mx_fast, /* fetch message "fast" attributes */ + NIL, /* fetch message flags */ + NIL, /* fetch overview */ + NIL, /* fetch message envelopes */ + mx_header, /* fetch message header only */ + mx_text, /* fetch message body only */ + NIL, /* fetch partial message test */ + NIL, /* unique identifier */ + NIL, /* message number */ + mx_flag, /* modify flags */ + mx_flagmsg, /* per-message modify flags */ + NIL, /* search for message based on criteria */ + NIL, /* sort messages */ + NIL, /* thread messages */ + mx_ping, /* ping mailbox to see if still alive */ + mx_check, /* check for new messages */ + mx_expunge, /* expunge deleted messages */ + mx_copy, /* copy messages to another mailbox */ + mx_append, /* append string message to mailbox */ + NIL /* garbage collect stream */ +}; + + /* prototype stream */ +MAILSTREAM mxproto = {&mxdriver}; + +/* MX mail validate mailbox + * Accepts: mailbox name + * Returns: our driver if name is valid, NIL otherwise + */ + +DRIVER *mx_valid (char *name) +{ + char tmp[MAILTMPLEN]; + return mx_isvalid (name,tmp) ? &mxdriver : NIL; +} + + +/* MX mail test for valid mailbox + * Accepts: mailbox name + * temporary buffer to use + * Returns: T if valid, NIL otherwise with errno holding dir stat error + */ + +int mx_isvalid (char *name,char *tmp) +{ + struct stat sbuf; + errno = NIL; /* zap error */ + if ((strlen (name) <= NETMAXMBX) && *mx_file (tmp,name) && + !stat (tmp,&sbuf) && ((sbuf.st_mode & S_IFMT) == S_IFDIR)) { + /* name is directory; is it mx? */ + if (!stat (MXINDEX (tmp,name),&sbuf) && + ((sbuf.st_mode & S_IFMT) == S_IFREG)) return T; + errno = NIL; /* directory but not mx */ + } + else if (!compare_cstring (name,"INBOX")) errno = NIL; + return NIL; +} + + +/* MX mail test for valid mailbox + * Accepts: mailbox name + * Returns: T if valid, NIL otherwise + */ + +int mx_namevalid (char *name) +{ + char *s = (*name == '/') ? name + 1 : name; + while (s && *s) { /* make sure valid name */ + 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 */ +} + +/* MX manipulate driver parameters + * Accepts: function code + * function-dependent value + * Returns: function-dependent return value + */ + +void *mx_parameters (long function,void *value) +{ + void *ret = NIL; + switch ((int) function) { + case GET_INBOXPATH: + if (value) ret = mailboxfile ((char *) value,"~/INBOX"); + break; + case GET_DIRFMTTEST: + ret = (void *) mx_dirfmttest; + break; + case GET_SCANCONTENTS: + ret = (void *) mx_scan_contents; + break; + } + return ret; +} + + +/* MX test for directory format internal node + * Accepts: candidate node name + * Returns: T if internal name, NIL otherwise + */ + +long mx_dirfmttest (char *name) +{ + int c; + /* success if index name or all-numberic */ + if (strcmp (name,MXINDEXNAME+1)) + while (c = *name++) if (!isdigit (c)) return NIL; + return LONGT; +} + +/* MX scan mailboxes + * Accepts: mail stream + * reference + * pattern to search + * string to scan + */ + +void mx_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents) +{ + if (stream) dummy_scan (NIL,ref,pat,contents); +} + + +/* MX scan mailbox for contents + * Accepts: mailbox name + * desired contents + * contents size + * file size (ignored) + * Returns: NIL if contents not found, T if found + */ + +long mx_scan_contents (char *name,char *contents,unsigned long csiz, + unsigned long fsiz) +{ + long i,nfiles; + void *a; + char *s; + long ret = NIL; + size_t namelen = strlen (name); + struct stat sbuf; + struct direct **names = NIL; + if ((nfiles = scandir (name,&names,mx_select,mx_numsort)) > 0) + for (i = 0; i < nfiles; ++i) { + if (!ret) { + sprintf (s = (char *) fs_get (namelen + strlen (names[i]->d_name) + 2), + "%s/%s",name,names[i]->d_name); + if (!stat (s,&sbuf) && (csiz <= sbuf.st_size)) + ret = dummy_scan_contents (s,contents,csiz,sbuf.st_size); + fs_give ((void **) &s); + } + fs_give ((void **) &names[i]); + } + /* free directory list */ + if (a = (void *) names) fs_give ((void **) &a); + return ret; +} + +/* MX list mailboxes + * Accepts: mail stream + * reference + * pattern to search + */ + +void mx_list (MAILSTREAM *stream,char *ref,char *pat) +{ + if (stream) dummy_list (NIL,ref,pat); +} + + +/* MX list subscribed mailboxes + * Accepts: mail stream + * reference + * pattern to search + */ + +void mx_lsub (MAILSTREAM *stream,char *ref,char *pat) +{ + if (stream) dummy_lsub (NIL,ref,pat); +} + +/* MX mail subscribe to mailbox + * Accepts: mail stream + * mailbox to add to subscription list + * Returns: T on success, NIL on failure + */ + +long mx_subscribe (MAILSTREAM *stream,char *mailbox) +{ + return sm_subscribe (mailbox); +} + + +/* MX mail unsubscribe to mailbox + * Accepts: mail stream + * mailbox to delete from subscription list + * Returns: T on success, NIL on failure + */ + +long mx_unsubscribe (MAILSTREAM *stream,char *mailbox) +{ + return sm_unsubscribe (mailbox); +} + +/* MX mail create mailbox + * Accepts: mail stream + * mailbox name to create + * Returns: T on success, NIL on failure + */ + +long mx_create (MAILSTREAM *stream,char *mailbox) +{ + DRIVER *test; + int fd; + char *s,tmp[MAILTMPLEN]; + int mask = umask (0); + long ret = NIL; + if (!mx_namevalid (mailbox)) /* validate name */ + sprintf (tmp,"Can't create mailbox %.80s: invalid MX-format name",mailbox); + /* must not already exist */ + else if ((test = mail_valid (NIL,mailbox,NIL)) && + strcmp (test->name,"dummy")) + sprintf (tmp,"Can't create mailbox %.80s: mailbox already exists",mailbox); + /* create directory */ + else if (!dummy_create_path (stream,MXINDEX (tmp,mailbox), + get_dir_protection (mailbox))) + sprintf (tmp,"Can't create mailbox %.80s: %s",mailbox,strerror (errno)); + else { /* success */ + /* set index protection */ + set_mbx_protections (mailbox,tmp); + /* tie off directory name */ + *(s = strrchr (tmp,'/') + 1) = '\0'; + /* set directory protection */ + set_mbx_protections (mailbox,tmp); + ret = LONGT; + } + umask (mask); /* restore mask */ + if (!ret) MM_LOG (tmp,ERROR); /* some error */ + return ret; +} + +/* MX mail delete mailbox + * mailbox name to delete + * Returns: T on success, NIL on failure + */ + +long mx_delete (MAILSTREAM *stream,char *mailbox) +{ + DIR *dirp; + struct direct *d; + char *s; + char tmp[MAILTMPLEN]; + if (!mx_isvalid (mailbox,tmp)) + sprintf (tmp,"Can't delete mailbox %.80s: no such mailbox",mailbox); + /* delete index */ + else if (unlink (MXINDEX (tmp,mailbox))) + sprintf (tmp,"Can't delete mailbox %.80s index: %s", + mailbox,strerror (errno)); + else { /* get directory name */ + *(s = strrchr (tmp,'/')) = '\0'; + if (dirp = opendir (tmp)) { /* open directory */ + *s++ = '/'; /* restore delimiter */ + /* massacre messages */ + while (d = readdir (dirp)) if (mx_select (d)) { + strcpy (s,d->d_name); /* make path */ + unlink (tmp); /* sayonara */ + } + closedir (dirp); /* flush directory */ + *(s = strrchr (tmp,'/')) = '\0'; + if (rmdir (tmp)) { /* try to remove the directory */ + sprintf (tmp,"Can't delete name %.80s: %s",mailbox,strerror (errno)); + MM_LOG (tmp,WARN); + } + } + return T; /* always success */ + } + MM_LOG (tmp,ERROR); /* something failed */ + return NIL; +} + +/* MX mail rename mailbox + * Accepts: MX mail stream + * old mailbox name + * new mailbox name + * Returns: T on success, NIL on failure + */ + +long mx_rename (MAILSTREAM *stream,char *old,char *newname) +{ + char c,*s,tmp[MAILTMPLEN],tmp1[MAILTMPLEN]; + struct stat sbuf; + if (!mx_isvalid (old,tmp)) + sprintf (tmp,"Can't rename mailbox %.80s: no such mailbox",old); + else if (!mx_namevalid (newname)) + sprintf (tmp,"Can't rename to mailbox %.80s: invalid MX-format name", + newname); + /* new mailbox name must not be valid */ + else if (mx_isvalid (newname,tmp)) + sprintf (tmp,"Can't rename to mailbox %.80s: destination already exists", + newname); + else { + mx_file (tmp,old); /* build old directory name */ + mx_file (tmp1,newname); /* and new directory name */ + /* easy if not INBOX */ + if (compare_cstring (old,"INBOX")) { + /* found superior to destination name? */ + if (s = strrchr (mx_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 (tmp,tmp1)) return LONGT; + } + + /* RFC 3501 requires this */ + else if (dummy_create_path (stream,strcat (tmp1,"/"), + get_dir_protection (newname))) { + void *a; + int i,n,lasterror; + struct direct **names = NIL; + size_t srcl = strlen (tmp); + size_t dstl = strlen (tmp1); + /* rename each mx file to new directory */ + for (i = lasterror = 0,n = scandir (tmp,&names,mx_select,mx_numsort); + i < n; ++i) { + if (mx_rename_work (tmp,srcl,tmp1,dstl,names[i]->d_name)) + lasterror = errno; + fs_give ((void **) &names[i]); + } + /* free directory list */ + if (a = (void *) names) fs_give ((void **) &a); + if (lasterror || mx_rename_work (tmp,srcl,tmp1,dstl,MXINDEXNAME+1)) + errno = lasterror; + else return mx_create (NIL,"INBOX"); + } + sprintf (tmp,"Can't rename mailbox %.80s to %.80s: %s", + old,newname,strerror (errno)); + } + MM_LOG (tmp,ERROR); /* something failed */ + return NIL; +} + + +/* MX rename worker routine + * Accepts: source directory name + * source directory name length + * destination directory name + * destination directory name length + * name of node to move + * Returns: zero if success, non-zero if error + */ + +int mx_rename_work (char *src,size_t srcl,char *dst,size_t dstl,char *name) +{ + int ret; + size_t len = strlen (name); + char *s = (char *) fs_get (srcl + len + 2); + char *d = (char *) fs_get (dstl + len + 1); + sprintf (s,"%s/%s",src,name); + sprintf (d,"%s%s",dst,name); + ret = rename (s,d); + fs_give ((void **) &s); + fs_give ((void **) &d); + return ret; +} + +/* MX mail open + * Accepts: stream to open + * Returns: stream on success, NIL on failure + */ + +MAILSTREAM *mx_open (MAILSTREAM *stream) +{ + char tmp[MAILTMPLEN]; + /* return prototype for OP_PROTOTYPE call */ + if (!stream) return user_flags (&mxproto); + if (stream->local) fatal ("mx recycle stream"); + stream->local = fs_get (sizeof (MXLOCAL)); + /* note if an INBOX or not */ + stream->inbox = !compare_cstring (stream->mailbox,"INBOX"); + mx_file (tmp,stream->mailbox);/* get directory name */ + /* canonicalize mailbox name */ + fs_give ((void **) &stream->mailbox); + stream->mailbox = cpystr (tmp); + /* make temporary buffer */ + LOCAL->buf = (char *) fs_get (CHUNKSIZE); + LOCAL->buflen = CHUNKSIZE - 1; + LOCAL->scantime = 0; /* not scanned yet */ + LOCAL->fd = -1; /* no index yet */ + LOCAL->cachedtexts = 0; /* no cached texts */ + stream->sequence++; /* bump sequence number */ + /* parse mailbox */ + stream->nmsgs = stream->recent = 0; + if (mx_ping (stream) && !(stream->nmsgs || stream->silent)) + MM_LOG ("Mailbox is empty",(long) NIL); + stream->perm_seen = stream->perm_deleted = stream->perm_flagged = + stream->perm_answered = stream->perm_draft = stream->rdonly ? NIL : T; + stream->perm_user_flags = stream->rdonly ? NIL : 0xffffffff; + stream->kwd_create = (stream->user_flags[NUSERFLAGS-1] || stream->rdonly) ? + NIL : T; /* can we create new user flags? */ + return stream; /* return stream to caller */ +} + +/* MX mail close + * Accepts: MAIL stream + * close options + */ + +void mx_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) mx_expunge (stream,NIL,NIL); + /* free local scratch buffer */ + if (LOCAL->buf) fs_give ((void **) &LOCAL->buf); + /* nuke the local data */ + fs_give ((void **) &stream->local); + stream->dtb = NIL; /* log out the DTB */ + stream->silent = silent; /* reset silent state */ + } +} + +/* MX mail fetch fast information + * Accepts: MAIL stream + * sequence + * option flags + */ + +void mx_fast (MAILSTREAM *stream,char *sequence,long flags) +{ + unsigned long i; + MESSAGECACHE *elt; + 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) mx_fast_work (stream,elt); +} + + +/* MX mail fetch fast information + * Accepts: MAIL stream + * message cache element + * Returns: name of message file + */ + +char *mx_fast_work (MAILSTREAM *stream,MESSAGECACHE *elt) +{ + struct stat sbuf; + struct tm *tm; + /* build message file name */ + sprintf (LOCAL->buf,"%s/%lu",stream->mailbox,elt->private.uid); + /* have size yet? */ + if (!elt->rfc822_size && !stat (LOCAL->buf,&sbuf)) { + /* make plausible IMAPish date string */ + tm = gmtime (&sbuf.st_mtime); + elt->day = tm->tm_mday; elt->month = tm->tm_mon + 1; + elt->year = tm->tm_year + 1900 - BASEYEAR; + elt->hours = tm->tm_hour; elt->minutes = tm->tm_min; + elt->seconds = tm->tm_sec; + elt->zhours = 0; elt->zminutes = 0; elt->zoccident = 0; + elt->rfc822_size = sbuf.st_size; + } + return (char *) LOCAL->buf; /* return file name */ +} + +/* MX 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 *mx_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *length, + long flags) +{ + unsigned long i; + int fd; + MESSAGECACHE *elt; + *length = 0; /* default to empty */ + if (flags & FT_UID) return "";/* UID call "impossible" */ + elt = mail_elt (stream,msgno);/* get elt */ + if (!elt->private.msg.header.text.data) { + /* purge cache if too big */ + if (LOCAL->cachedtexts > max (stream->nmsgs * 4096,2097152)) { + mail_gc (stream,GC_TEXTS);/* just can't keep that much */ + LOCAL->cachedtexts = 0; + } + if ((fd = open (mx_fast_work (stream,elt),O_RDONLY,NIL)) < 0) return ""; + /* is buffer big enough? */ + if (elt->rfc822_size > LOCAL->buflen) { + fs_give ((void **) &LOCAL->buf); + LOCAL->buf = (char *) fs_get ((LOCAL->buflen = elt->rfc822_size) + 1); + } + /* slurp message */ + read (fd,LOCAL->buf,elt->rfc822_size); + /* tie off file */ + LOCAL->buf[elt->rfc822_size] = '\0'; + close (fd); /* flush message file */ + /* find end of header */ + if (elt->rfc822_size < 4) i = 0; + else for (i = 4; (i < elt->rfc822_size) && + !((LOCAL->buf[i - 4] == '\015') && + (LOCAL->buf[i - 3] == '\012') && + (LOCAL->buf[i - 2] == '\015') && + (LOCAL->buf[i - 1] == '\012')); i++); + /* copy header */ + cpytxt (&elt->private.msg.header.text,LOCAL->buf,i); + cpytxt (&elt->private.msg.text.text,LOCAL->buf+i,elt->rfc822_size - i); + /* add to cached size */ + LOCAL->cachedtexts += elt->rfc822_size; + } + *length = elt->private.msg.header.text.size; + return (char *) elt->private.msg.header.text.data; +} + +/* MX 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 mx_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags) +{ + unsigned long i; + MESSAGECACHE *elt; + /* UID call "impossible" */ + if (flags & FT_UID) return NIL; + elt = mail_elt (stream,msgno); + /* snarf message if don't have it yet */ + if (!elt->private.msg.text.text.data) { + mx_header (stream,msgno,&i,flags); + if (!elt->private.msg.text.text.data) return NIL; + } + /* mark as seen */ + if (!(flags & FT_PEEK) && mx_lockindex (stream)) { + elt->seen = T; + mx_unlockindex (stream); + MM_FLAGS (stream,msgno); + } + INIT (bs,mail_string,elt->private.msg.text.text.data, + elt->private.msg.text.text.size); + return T; +} + +/* MX mail modify flags + * Accepts: MAIL stream + * sequence + * flag(s) + * option flags + */ + +void mx_flag (MAILSTREAM *stream,char *sequence,char *flag,long flags) +{ + mx_unlockindex (stream); /* finished with index */ +} + + +/* MX per-message modify flags + * Accepts: MAIL stream + * message cache element + */ + +void mx_flagmsg (MAILSTREAM *stream,MESSAGECACHE *elt) +{ + mx_lockindex (stream); /* lock index if not already locked */ +} + +/* MX mail ping mailbox + * Accepts: MAIL stream + * Returns: T if stream alive, else NIL + */ + +long mx_ping (MAILSTREAM *stream) +{ + MAILSTREAM *sysibx = NIL; + MESSAGECACHE *elt,*selt; + struct stat sbuf; + char *s,tmp[MAILTMPLEN]; + int fd; + unsigned long i,j,r,old; + long nmsgs = stream->nmsgs; + long recent = stream->recent; + int silent = stream->silent; + if (stat (stream->mailbox,&sbuf)) return NIL; + stream->silent = T; /* don't pass up exists events yet */ + if (sbuf.st_ctime != LOCAL->scantime) { + struct direct **names = NIL; + long nfiles = scandir (stream->mailbox,&names,mx_select,mx_numsort); + if (nfiles < 0) nfiles = 0; /* in case error */ + old = stream->uid_last; + /* note scanned now */ + LOCAL->scantime = sbuf.st_ctime; + /* scan directory */ + for (i = 0; i < nfiles; ++i) { + /* if newly seen, add to list */ + if ((j = atoi (names[i]->d_name)) > old) { + /* swell the cache */ + 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 */ + } + } + fs_give ((void **) &names[i]); + } + /* free directory */ + if (s = (void *) names) fs_give ((void **) &s); + } + stream->nmsgs = nmsgs; /* don't upset mail_uid() */ + + /* if INBOX, snarf from system INBOX */ + if (mx_lockindex (stream) && 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",stream->mailbox,++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_PEEK)) && + (write (fd,s,j) == j) && + (s = mail_fetchtext_full (sysibx,i,&j,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; + mx_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 MX mailbox failed: %.80s", + s,strerror (errno)); + MM_LOG (tmp,ERROR); + r = 0; /* stop the snarf in its tracks */ + } + } + /* update scan time */ + if (!stat (stream->mailbox,&sbuf)) LOCAL->scantime = sbuf.st_ctime; + mail_expunge (sysibx); /* now expunge all those messages */ + } + if (sysibx) mail_close (sysibx); + MM_NOCRITICAL (stream); /* release critical */ + } + mx_unlockindex (stream); /* done with index */ + 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 */ +} + +/* MX mail check mailbox + * Accepts: MAIL stream + */ + +void mx_check (MAILSTREAM *stream) +{ + if (mx_ping (stream)) MM_LOG ("Check completed",(long) NIL); +} + + +/* MX mail expunge mailbox + * Accepts: MAIL stream + * sequence to expunge if non-NIL + * expunge options + * Returns: T, always + */ + +long mx_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) && + mx_lockindex (stream)) { /* lock the index */ + 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",stream->mailbox,elt->private.uid); + if (unlink (LOCAL->buf)) {/* try to delete the message */ + sprintf (LOCAL->buf,"Expunge of message %lu failed, aborted: %s",i, + strerror (errno)); + MM_LOG (LOCAL->buf,(long) NIL); + break; + } + /* note uncached */ + LOCAL->cachedtexts -= ((elt->private.msg.header.text.data ? + elt->private.msg.header.text.size : 0) + + (elt->private.msg.text.text.data ? + elt->private.msg.text.text.size : 0)); + mail_gc_msg (&elt->private.msg,GC_ENV | GC_TEXTS); + if(elt->recent)--recent;/* if recent, note one less recent message */ + mail_expunged(stream,i);/* notify upper levels */ + n++; /* count up one more expunged message */ + } + else i++; /* otherwise try next message */ + } + if (n) { /* output the news if any expunged */ + sprintf (LOCAL->buf,"Expunged %lu messages",n); + MM_LOG (LOCAL->buf,(long) NIL); + } + else MM_LOG ("No messages deleted, so no update needed",(long) NIL); + MM_NOCRITICAL (stream); /* release critical */ + mx_unlockindex (stream); /* finished with index */ + /* notify upper level of new mailbox size */ + mail_exists (stream,stream->nmsgs); + mail_recent (stream,recent); + } + return ret; +} + +/* MX mail copy message(s) + * Accepts: MAIL stream + * sequence + * destination mailbox + * copy options + * Returns: T if copy successful, else NIL + */ + +long mx_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options) +{ + FDDATA d; + STRING st; + MESSAGECACHE *elt; + MAILSTREAM *astream; + struct stat sbuf; + int fd; + unsigned long i,j,uid,uidv; + char *t,tmp[MAILTMPLEN]; + long ret; + mailproxycopy_t pc = + (mailproxycopy_t) mail_parameters (stream,GET_MAILPROXYCOPY,NIL); + /* make sure valid mailbox */ + if (!mx_valid (mailbox)) switch (errno) { + case NIL: /* no error in stat() */ + if (pc) return (*pc) (stream,sequence,mailbox,options); + sprintf (LOCAL->buf,"Not a MX-format mailbox: %.80s",mailbox); + MM_LOG (LOCAL->buf,ERROR); + return NIL; + default: /* some stat() error */ + MM_NOTIFY (stream,"[TRYCREATE] Must create mailbox before copy",NIL); + return NIL; + } + /* copy the messages */ + if (!(ret = ((options & CP_UID) ? mail_uid_sequence (stream,sequence) : + mail_sequence (stream,sequence)))); + /* acquire stream to append to */ + else if (!(astream = mail_open (NIL,mailbox,OP_SILENT))) { + MM_LOG ("Can't open copy mailbox",ERROR); + ret = NIL; + } + else { + MM_CRITICAL (stream); /* go critical */ + if (!(ret = mx_lockindex (astream))) + MM_LOG ("Message copy failed: unable to lock index",ERROR); + else { + + copyuid_t cu = (copyuid_t) mail_parameters (NIL,GET_COPYUID,NIL); + SEARCHSET *source = cu ? mail_newsearchset () : NIL; + SEARCHSET *dest = cu ? mail_newsearchset () : NIL; + for (i = 1,uid = uidv = 0; ret && (i <= stream->nmsgs); i++) + if ((elt = mail_elt (stream,i))->sequence) { + if (ret = ((fd = open (mx_fast_work (stream,elt),O_RDONLY,NIL)) + >= 0)) { + fstat (fd,&sbuf); /* get size of message */ + d.fd = fd; /* set up file descriptor */ + d.pos = 0; /* start of file */ + d.chunk = LOCAL->buf; + d.chunksize = CHUNKSIZE; + INIT (&st,fd_string,&d,sbuf.st_size); + /* init flag string */ + tmp[0] = tmp[1] = '\0'; + if (j = elt->user_flags) do + if (t = stream->user_flags[find_rightmost_bit (&j)]) + strcat (strcat (tmp," "),t); + while (j); + if (elt->seen) strcat (tmp," \\Seen"); + if (elt->deleted) strcat (tmp," \\Deleted"); + if (elt->flagged) strcat (tmp," \\Flagged"); + if (elt->answered) strcat (tmp," \\Answered"); + if (elt->draft) strcat (tmp," \\Draft"); + tmp[0] = '('; /* open list */ + strcat (tmp,")"); /* close list */ + if (ret = mx_append_msg (astream,tmp,elt,&st,dest)) { + /* add to source set if needed */ + if (source) mail_append_set (source,mail_uid (stream,i)); + /* delete if doing a move */ + if (options & CP_MOVE) elt->deleted = T; + } + } + } + /* return sets if doing COPYUID */ + if (cu && ret) (*cu) (stream,mailbox,astream->uid_validity,source,dest); + else { /* flush any sets we may have built */ + mail_free_searchset (&source); + mail_free_searchset (&dest); + } + mx_unlockindex (astream); /* unlock index */ + } + MM_NOCRITICAL (stream); + mail_close (astream); /* finished with append stream */ + } + return ret; /* return success */ +} + +/* MX mail append message from stringstruct + * Accepts: MAIL stream + * destination mailbox + * append callback + * data for callback + * Returns: T if append successful, else NIL + */ + +long mx_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data) +{ + MESSAGECACHE elt; + MAILSTREAM *astream; + char *flags,*date,tmp[MAILTMPLEN]; + STRING *message; + long ret = LONGT; + /* default stream to prototype */ + if (!stream) stream = user_flags (&mxproto); + /* N.B.: can't use LOCAL->buf for tmp */ + /* make sure valid mailbox */ + if (!mx_isvalid (mailbox,tmp)) switch (errno) { + case ENOENT: /* no such file? */ + if (!compare_cstring (mailbox,"INBOX")) mx_create (NIL,"INBOX"); + else { + MM_NOTIFY (stream,"[TRYCREATE] Must create mailbox before append",NIL); + return NIL; + } + /* falls through */ + case 0: /* merely empty file? */ + break; + case EINVAL: + sprintf (tmp,"Invalid MX-format mailbox name: %.80s",mailbox); + MM_LOG (tmp,ERROR); + return NIL; + default: + sprintf (tmp,"Not a MX-format mailbox: %.80s",mailbox); + MM_LOG (tmp,ERROR); + return NIL; + } + + /* get first message */ + if (!MM_APPEND (af) (stream,data,&flags,&date,&message)) return NIL; + if (!(astream = mail_open (NIL,mailbox,OP_SILENT))) { + MM_LOG ("Can't open append mailbox",ERROR); + return NIL; + } + MM_CRITICAL (astream); /* go critical */ + /* lock the index */ + if (!(ret = mx_lockindex (astream))) + MM_LOG ("Message append failed: unable to lock index",ERROR); + else { + appenduid_t au = (appenduid_t) mail_parameters (NIL,GET_APPENDUID,NIL); + SEARCHSET *dst = au ? mail_newsearchset () : NIL; + do { + /* guard against zero-length */ + if (!(ret = SIZE (message))) + MM_LOG ("Append of zero-length message",ERROR); + else if (date && !(ret = mail_parse_date (&elt,date))) { + sprintf (tmp,"Bad date in append: %.80s",date); + MM_LOG (tmp,ERROR); + } + else ret = mx_append_msg (astream,flags,date ? &elt : NIL,message,dst)&& + MM_APPEND (af) (stream,data,&flags,&date,&message); + } while (ret && message); + /* return sets if doing APPENDUID */ + if (au && ret) (*au) (mailbox,astream->uid_validity,dst); + else mail_free_searchset (&dst); + mx_unlockindex (astream); /* unlock index */ + } + MM_NOCRITICAL (astream); /* release critical */ + mail_close (astream); + return ret; +} + +/* MX mail append single message + * Accepts: MAIL stream + * flags for new message if non-NIL + * elt with source date if non-NIL + * stringstruct of message text + * searchset to place UID + * Returns: T if success, NIL if failure + */ + +long mx_append_msg (MAILSTREAM *stream,char *flags,MESSAGECACHE *elt, + STRING *st,SEARCHSET *set) +{ + char tmp[MAILTMPLEN]; + int fd; + unsigned long uf; + long f = mail_parse_flags (stream,flags,&uf); + /* make message file name */ + sprintf (tmp,"%s/%lu",stream->mailbox,++stream->uid_last); + if ((fd = open (tmp,O_WRONLY|O_CREAT|O_EXCL, + (long) mail_parameters (NIL,GET_MBXPROTECTION,NIL))) < 0) { + sprintf (tmp,"Can't create append message: %s",strerror (errno)); + MM_LOG (tmp,ERROR); + return NIL; + } + while (SIZE (st)) { /* copy the file */ + if (st->cursize && (write (fd,st->curpos,st->cursize) < 0)) { + unlink (tmp); /* delete file */ + close (fd); /* close the file */ + sprintf (tmp,"Message append failed: %s",strerror (errno)); + MM_LOG (tmp,ERROR); + return NIL; + } + SETPOS (st,GETPOS (st) + st->cursize); + } + close (fd); /* close the file */ + if (elt) mx_setdate (tmp,elt);/* set file date */ + /* swell the cache */ + mail_exists (stream,++stream->nmsgs); + /* copy flags */ + mail_append_set (set,(elt = mail_elt (stream,stream->nmsgs))->private.uid = + stream->uid_last); + if (f&fSEEN) elt->seen = T; + if (f&fDELETED) elt->deleted = T; + if (f&fFLAGGED) elt->flagged = T; + if (f&fANSWERED) elt->answered = T; + if (f&fDRAFT) elt->draft = T; + elt->user_flags |= uf; + return LONGT; +} + +/* Internal routines */ + + +/* MX file name selection test + * Accepts: candidate directory entry + * Returns: T to use file name, NIL to skip it + */ + +int mx_select (struct direct *name) +{ + char c; + char *s = name->d_name; + while (c = *s++) if (!isdigit (c)) return NIL; + return T; +} + + +/* MX 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 mx_numsort (const void *d1,const void *d2) +{ + return atoi ((*(struct direct **) d1)->d_name) - + atoi ((*(struct direct **) d2)->d_name); +} + + +/* MX mail build file name + * Accepts: destination string + * source + * Returns: destination + */ + +char *mx_file (char *dst,char *name) +{ + char *s; + /* empty string if mailboxfile fails */ + if (!mailboxfile (dst,name)) *dst = '\0'; + /* driver-selected INBOX */ + else if (!*dst) mailboxfile (dst,"~/INBOX"); + /* tie off unnecessary trailing / */ + else if ((s = strrchr (dst,'/')) && !s[1]) *s = '\0'; + return dst; +} + +/* MX read and lock index + * Accepts: MAIL stream + * Returns: T if success, NIL if failure + */ + +long mx_lockindex (MAILSTREAM *stream) +{ + unsigned long uf,sf,uid; + int k = 0; + unsigned long msgno = 1; + struct stat sbuf; + char *s,*t,*idx,tmp[2*MAILTMPLEN]; + MESSAGECACHE *elt; + blocknotify_t bn = (blocknotify_t) mail_parameters (NIL,GET_BLOCKNOTIFY,NIL); + if ((LOCAL->fd < 0) && /* get index file, no-op if already have it */ + (LOCAL->fd = open (strcat (strcpy (tmp,stream->mailbox),MXINDEXNAME), + O_RDWR|O_CREAT, + (long) mail_parameters (NIL,GET_MBXPROTECTION,NIL))) + >= 0) { + (*bn) (BLOCK_FILELOCK,NIL); + flock (LOCAL->fd,LOCK_EX); /* get exclusive lock */ + (*bn) (BLOCK_NONE,NIL); + fstat (LOCAL->fd,&sbuf); /* get size of index */ + /* slurp index */ + read (LOCAL->fd,s = idx = (char *) fs_get (sbuf.st_size + 1),sbuf.st_size); + idx[sbuf.st_size] = '\0'; /* tie off index */ + /* parse index */ + if (sbuf.st_size) while (s && *s) switch (*s) { + case 'V': /* UID validity record */ + stream->uid_validity = strtoul (s+1,&s,16); + break; + case 'L': /* UID last record */ + stream->uid_last = strtoul (s+1,&s,16); + break; + case 'K': /* keyword */ + /* find end of keyword */ + if (s = strchr (t = ++s,'\n')) { + *s++ = '\0'; /* tie off keyword */ + /* copy keyword */ + if ((k < NUSERFLAGS) && !stream->user_flags[k] && + (strlen (t) <= MAXUSERFLAG)) stream->user_flags[k] = cpystr (t); + k++; /* one more keyword */ + } + break; + + case 'M': /* message status record */ + uid = strtoul (s+1,&s,16);/* get UID for this message */ + if (*s == ';') { /* get user flags */ + uf = strtoul (s+1,&s,16); + if (*s == '.') { /* get system flags */ + sf = strtoul (s+1,&s,16); + while ((msgno <= stream->nmsgs) && (mail_uid (stream,msgno) < uid)) + msgno++; /* find message number for this UID */ + if ((msgno <= stream->nmsgs) && (mail_uid (stream,msgno) == uid)) { + (elt = mail_elt (stream,msgno))->valid = T; + elt->user_flags=uf; /* set user and system flags in elt */ + if (sf & fSEEN) elt->seen = T; + if (sf & fDELETED) elt->deleted = T; + if (sf & fFLAGGED) elt->flagged = T; + if (sf & fANSWERED) elt->answered = T; + if (sf & fDRAFT) elt->draft = T; + } + break; + } + } + default: /* bad news */ + sprintf (tmp,"Error in index: %.80s",s); + MM_LOG (tmp,ERROR); + *s = NIL; /* ignore remainder of index */ + } + else { /* new index */ + stream->uid_validity = time (0); + user_flags (stream); /* init stream with default user flags */ + } + fs_give ((void **) &idx); /* flush index */ + } + return (LOCAL->fd >= 0) ? T : NIL; +} + +/* MX write and unlock index + * Accepts: MAIL stream + */ + +#define MXIXBUFLEN 2048 + +void mx_unlockindex (MAILSTREAM *stream) +{ + unsigned long i,j; + off_t size = 0; + char *s,tmp[MXIXBUFLEN + 64]; + MESSAGECACHE *elt; + if (LOCAL->fd >= 0) { + lseek (LOCAL->fd,0,L_SET); /* rewind file */ + /* write header */ + sprintf (s = tmp,"V%08lxL%08lx",stream->uid_validity,stream->uid_last); + for (i = 0; (i < NUSERFLAGS) && stream->user_flags[i]; ++i) + sprintf (s += strlen (s),"K%s\n",stream->user_flags[i]); + /* write messages */ + for (i = 1; i <= stream->nmsgs; i++) { + /* filled buffer? */ + if (((s += strlen (s)) - tmp) > MXIXBUFLEN) { + write (LOCAL->fd,tmp,j = s - tmp); + size += j; + *(s = tmp) = '\0'; /* dump out and restart buffer */ + } + elt = mail_elt (stream,i); + sprintf(s,"M%08lx;%08lx.%04x",elt->private.uid,elt->user_flags,(unsigned) + ((fSEEN * elt->seen) + (fDELETED * elt->deleted) + + (fFLAGGED * elt->flagged) + (fANSWERED * elt->answered) + + (fDRAFT * elt->draft))); + } + /* write tail end of buffer */ + if ((s += strlen (s)) != tmp) { + write (LOCAL->fd,tmp,j = s - tmp); + size += j; + } + ftruncate (LOCAL->fd,size); + flock (LOCAL->fd,LOCK_UN); /* unlock the index */ + close (LOCAL->fd); /* finished with file */ + LOCAL->fd = -1; /* no index now */ + } +} + +/* Set date for message + * Accepts: file name + * elt containing date + */ + +void mx_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 */ +} |