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- /*
- * Program: MH mail routines
- *
- * Author(s): Mark Crispin
- * Networks and Distributed Computing
- * Computing & Communications
- * University of Washington
- * Administration Building, AG-44
- * Seattle, WA 98195
- * Internet: MRC@CAC.Washington.EDU
- *
- * Andrew Cohen
- * Internet: cohen@bucrf16.bu.edu
- *
- * Date: 23 February 1992
- * Last Edited: 18 November 1993
- *
- * Copyright 1993 by the University of Washington
- *
- * Permission to use, copy, modify, and distribute this software and its
- * documentation for any purpose and without fee is hereby granted, provided
- * that the above copyright notice appears in all copies and that both the
- * above copyright notice and this permission notice appear in supporting
- * documentation, and that the name of the University of Washington not be
- * used in advertising or publicity pertaining to distribution of the software
- * without specific, written prior permission. This software is made
- * available "as is", and
- * THE UNIVERSITY OF WASHINGTON DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED,
- * WITH REGARD TO THIS SOFTWARE, INCLUDING WITHOUT LIMITATION ALL IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, AND IN
- * NO EVENT SHALL THE UNIVERSITY OF WASHINGTON BE LIABLE FOR ANY SPECIAL,
- * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
- * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, TORT
- * (INCLUDING NEGLIGENCE) OR STRICT LIABILITY, ARISING OUT OF OR IN CONNECTION
- * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- *
- */
-
- #include <stdio.h>
- #include <ctype.h>
- #include <netdb.h>
- #include <errno.h>
- extern int errno; /* just in case */
- #include <sys/types.h>
- #include "mail.h"
- #include "osdep.h"
- #include <pwd.h>
- #include <sys/file.h>
- #include <sys/stat.h>
- #include <sys/time.h>
- #include "mh.h"
- #include "rfc822.h"
- #include "misc.h"
-
- /* MH mail routines */
-
-
- /* Driver dispatch used by MAIL */
-
- DRIVER mhdriver = {
- "mh", /* driver name */
- (DRIVER *) NIL, /* next driver */
- mh_valid, /* mailbox is valid for us */
- mh_parameters, /* manipulate parameters */
- mh_find, /* find mailboxes */
- mh_find_bboards, /* find bboards */
- mh_find_all, /* find all mailboxes */
- mh_find_all_bboards, /* find all bboards */
- mh_subscribe, /* subscribe to mailbox */
- mh_unsubscribe, /* unsubscribe from mailbox */
- mh_subscribe_bboard, /* subscribe to bboard */
- mh_unsubscribe_bboard, /* unsubscribe from bboard */
- mh_create, /* create mailbox */
- mh_delete, /* delete mailbox */
- mh_rename, /* rename mailbox */
- mh_open, /* open mailbox */
- mh_close, /* close mailbox */
- mh_fetchfast, /* fetch message "fast" attributes */
- mh_fetchflags, /* fetch message flags */
- mh_fetchstructure, /* fetch message envelopes */
- mh_fetchheader, /* fetch message header only */
- mh_fetchtext, /* fetch message body only */
- mh_fetchbody, /* fetch message body section */
- mh_setflag, /* set message flag */
- mh_clearflag, /* clear message flag */
- mh_search, /* search for message based on criteria */
- 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_move, /* move messages to another mailbox */
- mh_append, /* append string message to mailbox */
- mh_gc /* garbage collect stream */
- };
-
- /* prototype stream */
- MAILSTREAM mhproto = {&mhdriver};
-
- /* MH mail validate mailbox
- * Accepts: mailbox name
- * Returns: our driver if name is valid, NIL otherwise
- */
-
- DRIVER *mh_valid (name)
- char *name;
- {
- char tmp[MAILTMPLEN];
- return mh_isvalid (name,tmp) ? &mhdriver : NIL;
- }
-
-
- /* MH mail test for valid mailbox
- * Accepts: mailbox name
- * Returns: T if valid, NIL otherwise
- */
-
- int mh_isvalid (name,tmp)
- char *name;
- char *tmp;
- {
- struct stat sbuf;
- /* if file, get its status */
- return (*name != '{' && *name != '.' &&
- (stat (mh_file (tmp,name),&sbuf) == 0) &&
- (sbuf.st_mode & S_IFMT) == S_IFDIR);
- }
-
-
- /* MH mail build file name
- * Accepts: destination string
- * source
- * Returns: destination
- */
-
- char *mh_file (dst,name)
- char *dst;
- char *name;
- {
- #if 0
- struct passwd *pw;
- char *s,*t,tmp[MAILTMPLEN];
- switch (*name) {
- case '/': /* absolute file path */
- strcpy (dst,name); /* copy the mailbox name */
- break;
- case '~': /* home directory */
- if (name[1] == '/') t = myhomedir ();
- else {
- strcpy (tmp,name + 1); /* copy user name */
- if (s = strchr (tmp,'/')) *s = '\0';
- t = ((pw = getpwnam (tmp)) && pw->pw_dir) ? pw->pw_dir : "/NOSUCHUSER";
- }
- sprintf (dst,"%s%s",t,(s = strchr (name,'/')) ? s : "");
- break;
- default: /* relative path, goes in Mail folder */
- sprintf (dst,"%s/Mail/%s",myhomedir (),name);
- break;
- }
- #else
- sprintf (dst,"%s/Mail/%s",myhomedir (),name);
- #endif
- return dst;
- }
-
-
- /* MH manipulate driver parameters
- * Accepts: function code
- * function-dependent value
- * Returns: function-dependent return value
- */
-
- void *mh_parameters (function,value)
- long function;
- void *value;
- {
- fatal ("Invalid mh_parameters function");
- return NIL;
- }
-
- /* MH mail find list of mailboxes
- * Accepts: mail stream
- * pattern to search
- */
-
- void mh_find (stream,pat)
- MAILSTREAM *stream;
- char *pat;
- {
- void *s = NIL;
- char *t,tmp[MAILTMPLEN];
- while (t = sm_read (&s)) /* read subscription database */
- if ((*t != '{') && strcmp (t,"INBOX") && pmatch (t,pat) &&
- mh_isvalid (t,tmp)) mm_mailbox (t);
- }
-
-
- /* MH mail find list of bboards
- * Accepts: mail stream
- * pattern to search
- */
-
- void mh_find_bboards (stream,pat)
- MAILSTREAM *stream;
- char *pat;
- {
- /* Always a no-op */
- }
-
- /* MH mail find list of all mailboxes
- * Accepts: mail stream
- * pattern to search
- */
-
- void mh_find_all (stream,pat)
- MAILSTREAM *stream;
- char *pat;
- {
- DIR *dirp;
- struct direct *d;
- char tmp[MAILTMPLEN],file[MAILTMPLEN];
- int i = 0;
- char *s,*t;
- if (s = strrchr (pat,'/')) { /* directory specified in pattern? */
- strncpy (file,pat,i = (++s) - pat);
- file[i] = '\0'; /* tie off prefix */
- t = mh_file (tmp,pat); /* make fully-qualified file name */
- /* tie off directory name */
- if (s = strrchr (t,'/')) *s = '\0';
- }
- else t = myhomedir (); /* use home directory to search */
- if (dirp = opendir (t)) { /* now open that directory */
- while (d = readdir (dirp)) {/* for each directory entry */
- strcpy (file + i,d->d_name);
- if (pmatch (file,pat) && (mh_isvalid (file,tmp))) mm_mailbox (file);
- }
- closedir (dirp); /* flush directory */
- }
- }
-
-
- /* MH mail find list of all bboards
- * Accepts: mail stream
- * pattern to search
- */
-
- void mh_find_all_bboards (stream,pat)
- MAILSTREAM *stream;
- char *pat;
- {
- /* Always a no-op */
- }
-
- /* MH mail subscribe to mailbox
- * Accepts: mail stream
- * mailbox to add to subscription list
- * Returns: T on success, NIL on failure
- */
-
- long mh_subscribe (stream,mailbox)
- MAILSTREAM *stream;
- char *mailbox;
- {
- char tmp[MAILTMPLEN];
- return sm_subscribe (mh_file (tmp,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 (stream,mailbox)
- MAILSTREAM *stream;
- char *mailbox;
- {
- char tmp[MAILTMPLEN];
- return sm_unsubscribe (mh_file (tmp,mailbox));
- }
-
-
- /* MH mail subscribe to bboard
- * Accepts: mail stream
- * bboard to add to subscription list
- * Returns: T on success, NIL on failure
- */
-
- long mh_subscribe_bboard (stream,mailbox)
- MAILSTREAM *stream;
- char *mailbox;
- {
- return NIL; /* never valid for MH */
- }
-
-
- /* MH mail unsubscribe to bboard
- * Accepts: mail stream
- * bboard to delete from subscription list
- * Returns: T on success, NIL on failure
- */
-
- long mh_unsubscribe_bboard (stream,mailbox)
- MAILSTREAM *stream;
- char *mailbox;
- {
- return NIL; /* never valid for MH */
- }
-
- /* MH mail create mailbox
- * Accepts: mail stream
- * mailbox name to create
- * Returns: T on success, NIL on failure
- */
-
- long mh_create (stream,mailbox)
- MAILSTREAM *stream;
- char *mailbox;
- {
- return NIL; /* this driver is read-only */
- }
-
-
- /* MH mail delete mailbox
- * mailbox name to delete
- * Returns: T on success, NIL on failure
- */
-
- long mh_delete (stream,mailbox)
- MAILSTREAM *stream;
- char *mailbox;
- {
- return NIL; /* this driver is read-only */
- }
-
-
- /* MH mail rename mailbox
- * Accepts: MH mail stream
- * old mailbox name
- * new mailbox name
- * Returns: T on success, NIL on failure
- */
-
- long mh_rename (stream,old,new)
- MAILSTREAM *stream;
- char *old;
- char *new;
- {
- return NIL; /* this driver is read-only */
- }
-
- /* MH mail open
- * Accepts: stream to open
- * Returns: stream on success, NIL on failure
- */
-
- MAILSTREAM *mh_open (stream)
- MAILSTREAM *stream;
- {
- long i,nmsgs;
- long recent = 0;
- char tmp[MAILTMPLEN];
- struct hostent *host_name;
- struct direct **names;
- if (!stream) return &mhproto; /* return prototype for OP_PROTOTYPE call */
- if (LOCAL) { /* close old file if stream being recycled */
- mh_close (stream); /* dump and save the changes */
- stream->dtb = &mhdriver; /* reattach this driver */
- mail_free_cache (stream); /* clean up cache */
- }
- mh_file (tmp,stream->mailbox);/* canonicalize the stream mailbox name */
- if (!strcmp (tmp,stream->mailbox)) {
- fs_give ((void **) &stream->mailbox);
- stream->mailbox = cpystr (tmp);
- }
- if (!lhostn) { /* have local host yet? */
- gethostname(tmp,MAILTMPLEN);/* get local host name */
- lhostn = cpystr ((host_name = gethostbyname (tmp)) ?
- host_name->h_name : tmp);
- }
- /* scan directory */
- if ((nmsgs = scandir (tmp,&names,mh_select,mh_numsort)) >= 0) {
- stream->local = fs_get (sizeof (MHLOCAL));
- LOCAL->dirty = NIL; /* no update to .mhrc needed yet */
- LOCAL->dir = cpystr (tmp); /* copy directory name for later */
- /* create cache */
- LOCAL->number = (unsigned long *) fs_get (nmsgs * sizeof (unsigned long));
- LOCAL->header = (char **) fs_get (nmsgs * sizeof (char *));
- LOCAL->body = (char **) fs_get (nmsgs * sizeof (char *));
- LOCAL->seen = (char *) fs_get (nmsgs * sizeof (char));
- for (i = 0; i<nmsgs; ++i) { /* initialize cache */
- LOCAL->number[i] = atoi (names[i]->d_name);
- fs_give ((void **) &names[i]);
- LOCAL->header[i] = LOCAL->body[i] = NIL;
- LOCAL->seen[i] = NIL;
- }
- fs_give ((void **) &names); /* free directory */
- /* make temporary buffer */
- LOCAL->buf = (char *) fs_get ((LOCAL->buflen = MAXMESSAGESIZE) + 1);
- stream->sequence++; /* bump sequence number */
- stream->readonly = T; /* make sure higher level knows readonly */
- mail_exists (stream,nmsgs); /* notify upper level that messages exist */
-
- while (i < nmsgs) { /* mark all remaining messages as new */
- LOCAL->seen[i++] = NIL;
- mail_elt (stream,i)->recent = T;
- ++recent; /* count another recent message */
- }
- mail_recent (stream,recent);/* notify upper level about recent */
- /* notify if empty bboard */
- if (!(stream->nmsgs || stream->silent)) mm_log ("folder is empty",WARN);
- }
- return LOCAL ? stream : NIL; /* if stream is alive, return to caller */
- }
-
-
- /* MH file name selection test
- * Accepts: candidate directory entry
- * Returns: T to use file name, NIL to skip it
- */
-
- int mh_select (name)
- 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 (d1,d2)
- struct direct **d1;
- struct direct **d2;
- {
- return (atoi ((*d1)->d_name) - atoi ((*d2)->d_name));
- }
-
- /* MH mail close
- * Accepts: MAIL stream
- */
-
- void mh_close (stream)
- MAILSTREAM *stream;
- {
- if (LOCAL) { /* only if a file is open */
- mh_check (stream); /* dump final checkpoint */
- if (LOCAL->dir) fs_give ((void **) &LOCAL->dir);
- mh_gc (stream,GC_TEXTS); /* free local cache */
- fs_give ((void **) &LOCAL->number);
- fs_give ((void **) &LOCAL->header);
- fs_give ((void **) &LOCAL->body);
- fs_give ((void **) &LOCAL->seen);
- /* 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 */
- }
- }
-
- /* MH mail fetch fast information
- * Accepts: MAIL stream
- * sequence
- */
-
- void mh_fetchfast (stream,sequence)
- MAILSTREAM *stream;
- char *sequence;
- {
- return; /* no-op for local mail */
- }
-
-
- /* MH mail fetch flags
- * Accepts: MAIL stream
- * sequence
- */
-
- void mh_fetchflags (stream,sequence)
- MAILSTREAM *stream;
- char *sequence;
- {
- return; /* no-op for local mail */
- }
-
-
- /* MH mail fetch message structure
- * Accepts: MAIL stream
- * message # to fetch
- * pointer to return body
- * Returns: envelope of this message, body returned in body value
- *
- * Fetches the "fast" information as well
- */
-
- ENVELOPE *mh_fetchstructure (stream,msgno,body)
- MAILSTREAM *stream;
- long msgno;
- BODY **body;
- {
- char *h,*t;
- LONGCACHE *lelt;
- ENVELOPE **env;
- STRING bs;
- BODY **b;
- if (stream->scache) { /* short cache */
- if (msgno != stream->msgno){/* flush old poop if a different message */
- mail_free_envelope (&stream->env);
- mail_free_body (&stream->body);
- }
- stream->msgno = msgno;
- env = &stream->env; /* get pointers to envelope and body */
- b = &stream->body;
- }
- else { /* long cache */
- lelt = mail_lelt (stream,msgno);
- env = &lelt->env; /* get pointers to envelope and body */
- b = &lelt->body;
- }
- if ((body && !*b) || !*env) { /* have the poop we need? */
- mail_free_envelope (env); /* flush old envelope and body */
- mail_free_body (b);
- h = mh_fetchheader (stream,msgno);
- /* can't use fetchtext since it'll set seen */
- t = LOCAL->body[msgno - 1] ? LOCAL->body[msgno - 1] : "";
- INIT (&bs,mail_string,(void *) t,strlen (t));
- /* parse envelope and body */
- rfc822_parse_msg (env,body ? b : NIL,h,strlen (h),&bs,lhostn,LOCAL->buf);
- }
- if (body) *body = *b; /* return the body */
- return *env; /* return the envelope */
- }
-
- /* MH mail fetch message header
- * Accepts: MAIL stream
- * message # to fetch
- * Returns: message header in RFC822 format
- */
-
- char *mh_fetchheader (stream,msgno)
- MAILSTREAM *stream;
- long msgno;
- {
- unsigned long i,j;
- int fd;
- char *s,*b,*t;
- long m = msgno - 1;
- long lst = NIL;
- struct stat sbuf;
- struct tm *tm;
- MESSAGECACHE *elt = mail_elt (stream,msgno);
- /* build message file name */
- sprintf (LOCAL->buf,"%s/%lu",LOCAL->dir,LOCAL->number[m]);
- if (!LOCAL->header[m] && ((fd = open (LOCAL->buf,O_RDONLY,NIL)) >= 0)) {
- fstat (fd,&sbuf); /* get size of message */
- /* make plausible IMAPish date string */
- tm = gmtime (&sbuf.st_mtime);
- elt->day = tm->tm_mday; elt->month = tm->tm_mon + 1;
- elt->year = tm->tm_year + 1900 - BASEYEAR;
- elt->hours = tm->tm_hour; elt->minutes = tm->tm_min;
- elt->seconds = tm->tm_sec;
- elt->zhours = 0; elt->zminutes = 0;
- /* slurp message */
- read (fd,s = (char *) fs_get (sbuf.st_size +1),sbuf.st_size);
- s[sbuf.st_size] = '\0'; /* tie off file */
- close (fd); /* flush message file */
- /* find end of header and count lines */
- for (i=1,b=s; *b && !(lst && (*b == '\n'));) if (lst = (*b++ == '\n')) i++;
- /* copy header in CRLF form */
- LOCAL->header[m] = (char *) fs_get (i += (j = b - s));
- elt->rfc822_size = i - 1; /* size of message header */
- strcrlfcpy (&LOCAL->header[m],&i,s,j);
- /* copy body in CRLF form */
- for (i = 1,t = b; *t;) if (*t++ == '\n') i++;
- LOCAL->body[m] = (char *) fs_get (i += (j = t - b));
- elt->rfc822_size += i - 1; /* size of entire message */
- strcrlfcpy (&LOCAL->body[m],&i,b,j);
- fs_give ((void **) &s); /* flush old data */
- }
- return LOCAL->header[m] ? LOCAL->header[m] : "";
- }
-
- /* MH mail fetch message text (only)
- body only;
- * Accepts: MAIL stream
- * message # to fetch
- * Returns: message text in RFC822 format
- */
-
- char *mh_fetchtext (stream,msgno)
- MAILSTREAM *stream;
- long msgno;
- {
- long i = msgno - 1;
- MESSAGECACHE *elt = mail_elt (stream,msgno);
- /* snarf message in case don't have it yet */
- mh_fetchheader (stream,msgno);
- if (!elt->seen) { /* if message not seen before */
- elt->seen = T; /* mark as seen */
- LOCAL->dirty = T; /* and that stream is now dirty */
- }
- LOCAL->seen[i] = T;
- return LOCAL->body[i] ? LOCAL->body[i] : "";
- }
-
- /* MH fetch message body as a structure
- * Accepts: Mail stream
- * message # to fetch
- * section specifier
- * pointer to length
- * Returns: pointer to section of message body
- */
-
- char *mh_fetchbody (stream,m,s,len)
- MAILSTREAM *stream;
- long m;
- char *s;
- unsigned long *len;
- {
- BODY *b;
- PART *pt;
- unsigned long i;
- char *base;
- unsigned long offset = 0;
- MESSAGECACHE *elt = mail_elt (stream,m);
- /* make sure have a body */
- if (!(mh_fetchstructure (stream,m,&b) && b && s && *s &&
- ((i = strtol (s,&s,10)) > 0) && (base = mh_fetchtext (stream,m))))
- return NIL;
- do { /* until find desired body part */
- /* multipart content? */
- if (b->type == TYPEMULTIPART) {
- pt = b->contents.part; /* yes, find desired part */
- while (--i && (pt = pt->next));
- if (!pt) return NIL; /* bad specifier */
- /* note new body, check valid nesting */
- if (((b = &pt->body)->type == TYPEMULTIPART) && !*s) return NIL;
- offset = pt->offset; /* get new offset */
- }
- else if (i != 1) return NIL;/* otherwise must be section 1 */
- /* need to go down further? */
- if (i = *s) switch (b->type) {
- case TYPEMESSAGE: /* embedded message */
- offset = b->contents.msg.offset;
- b = b->contents.msg.body; /* get its body, drop into multipart case */
- case TYPEMULTIPART: /* multipart, get next section */
- if ((*s++ == '.') && (i = strtol (s,&s,10)) > 0) break;
- default: /* bogus subpart specification */
- return NIL;
- }
- } while (i);
- /* lose if body bogus */
- if ((!b) || b->type == TYPEMULTIPART) return NIL;
- if (!elt->seen) { /* if message not seen before */
- elt->seen = T; /* mark as seen */
- LOCAL->dirty = T; /* and that stream is now dirty */
- }
- LOCAL->seen[m-1] = T;
- return rfc822_contents (&LOCAL->buf,&LOCAL->buflen,len,base + offset,
- b->size.ibytes,b->encoding);
- }
-
- /* MH mail set flag
- * Accepts: MAIL stream
- * sequence
- * flag(s)
- */
-
- void mh_setflag (stream,sequence,flag)
- MAILSTREAM *stream;
- char *sequence;
- char *flag;
- {
- MESSAGECACHE *elt;
- long i;
- short f = mh_getflags (stream,flag);
- short f1 = f & (fSEEN|fDELETED);
- if (!f) return; /* no-op if no flags to modify */
- /* get sequence and loop on it */
- if (mail_sequence (stream,sequence)) for (i = 1; i <= stream->nmsgs; i++)
- if ((elt = mail_elt (stream,i))->sequence) {
- /* set all requested flags */
- 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 (f1 && !LOCAL->seen[i - 1]) LOCAL->seen[i - 1] = LOCAL->dirty = T;
- }
- }
-
-
- /* MH mail clear flag
- * Accepts: MAIL stream
- * sequence
- * flag(s)
- */
-
- void mh_clearflag (stream,sequence,flag)
- MAILSTREAM *stream;
- char *sequence;
- char *flag;
- {
- MESSAGECACHE *elt;
- long i = stream->nmsgs;
- short f = mh_getflags (stream,flag);
- short f1 = f & (fSEEN|fDELETED);
- if (!f) return; /* no-op if no flags to modify */
- /* get sequence and loop on it */
- if (mail_sequence (stream,sequence)) for (i = 1; i <= stream->nmsgs; i++)
- if ((elt = mail_elt (stream,i))->sequence) {
- /* clear all requested flags */
- if (f&fSEEN) elt->seen = NIL;
- if (f&fDELETED) elt->deleted = NIL;
- if (f&fFLAGGED) elt->flagged = NIL;
- if (f&fANSWERED) elt->answered = NIL;
- /* clearing either seen or deleted does this */
- if (f1 && LOCAL->seen[i - 1]) {
- LOCAL->seen[i - 1] = NIL;
- LOCAL->dirty = T; /* mark stream as dirty */
- }
- }
- }
-
- /* MH mail search for messages
- * Accepts: MAIL stream
- * search criteria
- */
-
- void mh_search (stream,criteria)
- MAILSTREAM *stream;
- char *criteria;
- {
- long i,n;
- char *d;
- search_t f;
- /* initially all searched */
- for (i = 1; i <= stream->nmsgs; ++i) mail_elt (stream,i)->searched = T;
- /* get first criterion */
- if (criteria && (criteria = strtok (criteria," "))) {
- /* for each criterion */
- for (; criteria; (criteria = strtok (NIL," "))) {
- f = NIL; d = NIL; n = 0; /* init then scan the criterion */
- switch (*ucase (criteria)) {
- case 'A': /* possible ALL, ANSWERED */
- if (!strcmp (criteria+1,"LL")) f = mh_search_all;
- else if (!strcmp (criteria+1,"NSWERED")) f = mh_search_answered;
- break;
- case 'B': /* possible BCC, BEFORE, BODY */
- if (!strcmp (criteria+1,"CC"))
- f = mh_search_string (mh_search_bcc,&d,&n);
- else if (!strcmp (criteria+1,"EFORE"))
- f = mh_search_date (mh_search_before,&n);
- else if (!strcmp (criteria+1,"ODY"))
- f = mh_search_string (mh_search_body,&d,&n);
- break;
- case 'C': /* possible CC */
- if (!strcmp (criteria+1,"C"))
- f = mh_search_string (mh_search_cc,&d,&n);
- break;
- case 'D': /* possible DELETED */
- if (!strcmp (criteria+1,"ELETED")) f = mh_search_deleted;
- break;
- case 'F': /* possible FLAGGED, FROM */
- if (!strcmp (criteria+1,"LAGGED")) f = mh_search_flagged;
- else if (!strcmp (criteria+1,"ROM"))
- f = mh_search_string (mh_search_from,&d,&n);
- break;
- case 'K': /* possible KEYWORD */
- if (!strcmp (criteria+1,"EYWORD"))
- f = mh_search_flag (mh_search_keyword,&d);
- break;
- case 'N': /* possible NEW */
- if (!strcmp (criteria+1,"EW")) f = mh_search_new;
- break;
-
- case 'O': /* possible OLD, ON */
- if (!strcmp (criteria+1,"LD")) f = mh_search_old;
- else if (!strcmp (criteria+1,"N"))
- f = mh_search_date (mh_search_on,&n);
- break;
- case 'R': /* possible RECENT */
- if (!strcmp (criteria+1,"ECENT")) f = mh_search_recent;
- break;
- case 'S': /* possible SEEN, SINCE, SUBJECT */
- if (!strcmp (criteria+1,"EEN")) f = mh_search_seen;
- else if (!strcmp (criteria+1,"INCE"))
- f = mh_search_date (mh_search_since,&n);
- else if (!strcmp (criteria+1,"UBJECT"))
- f = mh_search_string (mh_search_subject,&d,&n);
- break;
- case 'T': /* possible TEXT, TO */
- if (!strcmp (criteria+1,"EXT"))
- f = mh_search_string (mh_search_text,&d,&n);
- else if (!strcmp (criteria+1,"O"))
- f = mh_search_string (mh_search_to,&d,&n);
- break;
- case 'U': /* possible UN* */
- if (criteria[1] == 'N') {
- if (!strcmp (criteria+2,"ANSWERED")) f = mh_search_unanswered;
- else if (!strcmp (criteria+2,"DELETED")) f = mh_search_undeleted;
- else if (!strcmp (criteria+2,"FLAGGED")) f = mh_search_unflagged;
- else if (!strcmp (criteria+2,"KEYWORD"))
- f = mh_search_flag (mh_search_unkeyword,&d);
- else if (!strcmp (criteria+2,"SEEN")) f = mh_search_unseen;
- }
- break;
- default: /* we will barf below */
- break;
- }
- if (!f) { /* if can't determine any criteria */
- sprintf (LOCAL->buf,"Unknown search criterion: %s",criteria);
- mm_log (LOCAL->buf,ERROR);
- return;
- }
- /* run the search criterion */
- for (i = 1; i <= stream->nmsgs; ++i)
- if (mail_elt (stream,i)->searched && !(*f) (stream,i,d,n))
- mail_elt (stream,i)->searched = NIL;
- }
- /* report search results to main program */
- for (i = 1; i <= stream->nmsgs; ++i)
- if (mail_elt (stream,i)->searched) mail_searched (stream,i);
- }
- }
-
- /* MH mail ping mailbox
- * Accepts: MAIL stream
- * Returns: T if stream alive, else NIL
- */
-
- long mh_ping (stream)
- MAILSTREAM *stream;
- {
- return T; /* always alive */
- }
-
-
- /* MH mail check mailbox
- * Accepts: MAIL stream
- */
-
- void mh_check (stream)
- MAILSTREAM *stream;
- {
- /* A no-op for starters */
- }
-
-
- /* MH mail expunge mailbox
- * Accepts: MAIL stream
- */
-
- void mh_expunge (stream)
- MAILSTREAM *stream;
- {
- if (!stream->silent) mm_log ("Expunge ignored on readonly mailbox",NIL);
- }
-
- /* MH mail copy message(s)
- s;
- * Accepts: MAIL stream
- * sequence
- * destination mailbox
- * Returns: T if copy successful, else NIL
- */
-
- long mh_copy (stream,sequence,mailbox)
- MAILSTREAM *stream;
- char *sequence;
- char *mailbox;
- {
- mm_log ("Copy not valid for read-only mh mailbox",ERROR);
- return NIL;
- }
-
-
- /* MH mail move message(s)
- s;
- * Accepts: MAIL stream
- * sequence
- * destination mailbox
- * Returns: T if move successful, else NIL
- */
-
- long mh_move (stream,sequence,mailbox)
- MAILSTREAM *stream;
- char *sequence;
- char *mailbox;
- {
- mm_log ("Move not valid for read-only mh mailbox",ERROR);
- return NIL;
- }
-
-
- /* MH mail append message from stringstruct
- * Accepts: MAIL stream
- * destination mailbox
- * stringstruct of messages to append
- * Returns: T if append successful, else NIL
- */
-
- long mh_append (stream,mailbox,message)
- MAILSTREAM *stream;
- char *mailbox;
- STRING *message;
- {
- mm_log ("Append not valid for read-only mh mailbox",ERROR);
- return NIL;
- }
-
- /* MH garbage collect stream
- * Accepts: Mail stream
- * garbage collection flags
- */
-
- void mh_gc (stream,gcflags)
- MAILSTREAM *stream;
- long gcflags;
- {
- unsigned long i;
- if (gcflags & GC_TEXTS) /* garbage collect texts? */
- /* flush texts from cache */
- for (i = 0; i < stream->nmsgs; i++) {
- if (LOCAL->header[i]) fs_give ((void **) &LOCAL->header[i]);
- if (LOCAL->body[i]) fs_give ((void **) &LOCAL->body[i]);
- }
- }
-
- /* Internal routines */
-
-
- /* Parse flag list
- * Accepts: MAIL stream
- * flag list as a character string
- * Returns: flag command list
- */
-
- short mh_getflags (stream,flag)
- MAILSTREAM *stream;
- char *flag;
- {
- char *t;
- short f = 0;
- short i,j;
- if (flag && *flag) { /* no-op if no flag string */
- /* check if a list and make sure valid */
- if ((i = (*flag == '(')) ^ (flag[strlen (flag)-1] == ')')) {
- mm_log ("Bad flag list",ERROR);
- return NIL;
- }
- /* copy the flag string w/o list construct */
- strncpy (LOCAL->buf,flag+i,(j = strlen (flag) - (2*i)));
- LOCAL->buf[j] = '\0';
- t = ucase (LOCAL->buf); /* uppercase only from now on */
-
- while (*t) { /* parse the flags */
- if (*t == '\\') { /* system flag? */
- switch (*++t) { /* dispatch based on first character */
- case 'S': /* possible \Seen flag */
- if (t[1] == 'E' && t[2] == 'E' && t[3] == 'N') i = fSEEN;
- t += 4; /* skip past flag name */
- break;
- case 'D': /* possible \Deleted flag */
- if (t[1] == 'E' && t[2] == 'L' && t[3] == 'E' && t[4] == 'T' &&
- t[5] == 'E' && t[6] == 'D') i = fDELETED;
- t += 7; /* skip past flag name */
- break;
- case 'F': /* possible \Flagged flag */
- if (t[1] == 'L' && t[2] == 'A' && t[3] == 'G' && t[4] == 'G' &&
- t[5] == 'E' && t[6] == 'D') i = fFLAGGED;
- t += 7; /* skip past flag name */
- break;
- case 'A': /* possible \Answered flag */
- if (t[1] == 'N' && t[2] == 'S' && t[3] == 'W' && t[4] == 'E' &&
- t[5] == 'R' && t[6] == 'E' && t[7] == 'D') i = fANSWERED;
- t += 8; /* skip past flag name */
- break;
- default: /* unknown */
- i = 0;
- break;
- }
- /* add flag to flags list */
- if (i && ((*t == '\0') || (*t++ == ' '))) f |= i;
- else { /* bitch about bogus flag */
- mm_log ("Unknown system flag",ERROR);
- return NIL;
- }
- }
- else { /* no user flags yet */
- mm_log ("Unknown flag",ERROR);
- return NIL;
- }
- }
- }
- return f;
- }
-
- /* Search support routines
- * Accepts: MAIL stream
- * message number
- * pointer to additional data
- * pointer to temporary buffer
- * Returns: T if search matches, else NIL
- */
-
- char mh_search_all (stream,msgno,d,n)
- MAILSTREAM *stream;
- long msgno;
- char *d;
- long n;
- {
- return T; /* ALL always succeeds */
- }
-
-
- char mh_search_answered (stream,msgno,d,n)
- MAILSTREAM *stream;
- long msgno;
- char *d;
- long n;
- {
- return mail_elt (stream,msgno)->answered ? T : NIL;
- }
-
-
- char mh_search_deleted (stream,msgno,d,n)
- MAILSTREAM *stream;
- long msgno;
- char *d;
- long n;
- {
- return mail_elt (stream,msgno)->deleted ? T : NIL;
- }
-
-
- char mh_search_flagged (stream,msgno,d,n)
- MAILSTREAM *stream;
- long msgno;
- char *d;
- long n;
- {
- return mail_elt (stream,msgno)->flagged ? T : NIL;
- }
-
-
- char mh_search_keyword (stream,msgno,d,n)
- MAILSTREAM *stream;
- long msgno;
- char *d;
- long n;
- {
- return NIL; /* keywords not supported yet */
- }
-
-
- char mh_search_new (stream,msgno,d,n)
- MAILSTREAM *stream;
- long msgno;
- char *d;
- long n;
- {
- MESSAGECACHE *elt = mail_elt (stream,msgno);
- return (elt->recent && !elt->seen) ? T : NIL;
- }
-
- char mh_search_old (stream,msgno,d,n)
- MAILSTREAM *stream;
- long msgno;
- char *d;
- long n;
- {
- return mail_elt (stream,msgno)->recent ? NIL : T;
- }
-
-
- char mh_search_recent (stream,msgno,d,n)
- MAILSTREAM *stream;
- long msgno;
- char *d;
- long n;
- {
- return mail_elt (stream,msgno)->recent ? T : NIL;
- }
-
-
- char mh_search_seen (stream,msgno,d,n)
- MAILSTREAM *stream;
- long msgno;
- char *d;
- long n;
- {
- return mail_elt (stream,msgno)->seen ? T : NIL;
- }
-
-
- char mh_search_unanswered (stream,msgno,d,n)
- MAILSTREAM *stream;
- long msgno;
- char *d;
- long n;
- {
- return mail_elt (stream,msgno)->answered ? NIL : T;
- }
-
-
- char mh_search_undeleted (stream,msgno,d,n)
- MAILSTREAM *stream;
- long msgno;
- char *d;
- long n;
- {
- return mail_elt (stream,msgno)->deleted ? NIL : T;
- }
-
-
- char mh_search_unflagged (stream,msgno,d,n)
- MAILSTREAM *stream;
- long msgno;
- char *d;
- long n;
- {
- return mail_elt (stream,msgno)->flagged ? NIL : T;
- }
-
-
- char mh_search_unkeyword (stream,msgno,d,n)
- MAILSTREAM *stream;
- long msgno;
- char *d;
- long n;
- {
- return T; /* keywords not supported yet */
- }
-
-
- char mh_search_unseen (stream,msgno,d,n)
- MAILSTREAM *stream;
- long msgno;
- char *d;
- long n;
- {
- return mail_elt (stream,msgno)->seen ? NIL : T;
- }
-
- char mh_search_before (stream,msgno,d,n)
- MAILSTREAM *stream;
- long msgno;
- char *d;
- long n;
- {
- return (char) (mh_msgdate (stream,msgno) < n);
- }
-
-
- char mh_search_on (stream,msgno,d,n)
- MAILSTREAM *stream;
- long msgno;
- char *d;
- long n;
- {
- return (char) (mh_msgdate (stream,msgno) == n);
- }
-
-
- char mh_search_since (stream,msgno,d,n)
- MAILSTREAM *stream;
- long msgno;
- char *d;
- long n;
- {
- /* everybody interprets "since" as .GE. */
- return (char) (mh_msgdate (stream,msgno) >= n);
- }
-
-
- unsigned long mh_msgdate (stream,msgno)
- MAILSTREAM *stream;
- long msgno;
- {
- struct stat sbuf;
- struct tm *tm;
- MESSAGECACHE *elt = mail_elt (stream,msgno);
- if (!elt->day) { /* get date if don't have it yet */
- /* build message file name */
- sprintf (LOCAL->buf,"%s/%lu",LOCAL->dir,LOCAL->number[msgno - 1]);
- stat (LOCAL->buf,&sbuf); /* get message date */
- 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;
- }
- return (long) (elt->year << 9) + (elt->month << 5) + elt->day;
- }
-
- char mh_search_body (stream,msgno,d,n)
- MAILSTREAM *stream;
- long msgno;
- char *d;
- long n;
- {
- long i = msgno - 1;
- mh_fetchheader (stream,msgno);
- return LOCAL->body[i] ?
- search (LOCAL->body[i],strlen (LOCAL->body[i]),d,n) : NIL;
- }
-
-
- char mh_search_subject (stream,msgno,d,n)
- MAILSTREAM *stream;
- long msgno;
- char *d;
- long n;
- {
- char *t = mh_fetchstructure (stream,msgno,NIL)->subject;
- return t ? search (t,strlen (t),d,n) : NIL;
- }
-
-
- char mh_search_text (stream,msgno,d,n)
- MAILSTREAM *stream;
- long msgno;
- char *d;
- long n;
- {
- char *t = mh_fetchheader (stream,msgno);
- return (t && search (t,strlen (t),d,n)) ||
- mh_search_body (stream,msgno,d,n);
- }
-
- char mh_search_bcc (stream,msgno,d,n)
- MAILSTREAM *stream;
- long msgno;
- char *d;
- long n;
- {
- ADDRESS *a = mh_fetchstructure (stream,msgno,NIL)->bcc;
- LOCAL->buf[0] = '\0'; /* initially empty string */
- /* get text for address */
- rfc822_write_address (LOCAL->buf,a);
- return search (LOCAL->buf,(long) strlen (LOCAL->buf),d,n);
- }
-
-
- char mh_search_cc (stream,msgno,d,n)
- MAILSTREAM *stream;
- long msgno;
- char *d;
- long n;
- {
- ADDRESS *a = mh_fetchstructure (stream,msgno,NIL)->cc;
- LOCAL->buf[0] = '\0'; /* initially empty string */
- /* get text for address */
- rfc822_write_address (LOCAL->buf,a);
- return search (LOCAL->buf,(long) strlen (LOCAL->buf),d,n);
- }
-
-
- char mh_search_from (stream,msgno,d,n)
- MAILSTREAM *stream;
- long msgno;
- char *d;
- long n;
- {
- ADDRESS *a = mh_fetchstructure (stream,msgno,NIL)->from;
- LOCAL->buf[0] = '\0'; /* initially empty string */
- /* get text for address */
- rfc822_write_address (LOCAL->buf,a);
- return search (LOCAL->buf,(long) strlen (LOCAL->buf),d,n);
- }
-
-
- char mh_search_to (stream,msgno,d,n)
- MAILSTREAM *stream;
- long msgno;
- char *d;
- long n;
- {
- ADDRESS *a = mh_fetchstructure (stream,msgno,NIL)->to;
- LOCAL->buf[0] = '\0'; /* initially empty string */
- /* get text for address */
- rfc822_write_address (LOCAL->buf,a);
- return search (LOCAL->buf,(long) strlen (LOCAL->buf),d,n);
- }
-
- /* Search parsers */
-
-
- /* Parse a date
- * Accepts: function to return
- * pointer to date integer to return
- * Returns: function to return
- */
-
- search_t mh_search_date (f,n)
- search_t f;
- long *n;
- {
- long i;
- char *s;
- MESSAGECACHE elt;
- /* parse the date and return fn if OK */
- return (mh_search_string (f,&s,&i) && mail_parse_date (&elt,s) &&
- (*n = (elt.year << 9) + (elt.month << 5) + elt.day)) ? f : NIL;
- }
-
- /* Parse a flag
- * Accepts: function to return
- * pointer to string to return
- * Returns: function to return
- */
-
- search_t mh_search_flag (f,d)
- search_t f;
- char **d;
- {
- /* get a keyword, return if OK */
- return (*d = strtok (NIL," ")) ? f : NIL;
- }
-
-
- /* Parse a string
- * Accepts: function to return
- * pointer to string to return
- * pointer to string length to return
- * Returns: function to return
- */
-
- search_t mh_search_string (f,d,n)
- search_t f;
- char **d;
- long *n;
- {
- char *c = strtok (NIL,""); /* remainder of criteria */
- if (c) { /* better be an argument */
- switch (*c) { /* see what the argument is */
- case '\0': /* catch bogons */
- case ' ':
- return NIL;
- case '"': /* quoted string */
- if (!(strchr (c+1,'"') && (*d = strtok (c,"\"")) && (*n = strlen (*d))))
- return NIL;
- break;
- case '{': /* literal string */
- *n = strtol (c+1,&c,10); /* get its length */
- if (*c++ != '}' || *c++ != '\015' || *c++ != '\012' ||
- *n > strlen (*d = c)) return NIL;
- c[*n] = '\255'; /* write new delimiter */
- strtok (c,"\255"); /* reset the strtok mechanism */
- break;
- default: /* atomic string */
- *n = strlen (*d = strtok (c," "));
- break;
- }
- return f;
- }
- else return NIL;
- }
-