citadel/msgbase.c

   1 #include <stdlib.h>
   2 #include <unistd.h>
   3 #include <stdio.h>
   4 #include <fcntl.h>
   5 #include <time.h>
   6 #include <ctype.h>
   7 #include <string.h>
   8 #include <syslog.h>
   9 #include <pthread.h>
  10 #include "citadel.h"
  11 #include "server.h"
  12 #include <errno.h>
  13 #include "proto.h"
  14
  15 #define MSGS_ALL        0
  16 #define MSGS_OLD        1
  17 #define MSGS_NEW        2
  18 #define MSGS_FIRST      3
  19 #define MSGS_LAST       4
  20 #define MSGS_GT         5
  21
  22 extern struct config config;
  23 int twitroom=-1;
  24
  25
  26 /*
  27  * Aliasing for network mail.
  28  * (Error messages have been commented out, because this is a server.)
  29  */
  30 int alias(char *name)           /* process alias and routing info for mail */
  31              {
  32         FILE *fp;
  33         int a,b;
  34         char aaa[300],bbb[300];
  35
  36         fp=fopen("network/mail.aliases","r");
  37         if (fp==NULL) fp=fopen("/dev/null","r");
  38         if (fp==NULL) return(M_ERROR);
  39 GNA:    strcpy(aaa,""); strcpy(bbb,"");
  40         do {
  41                 a=getc(fp);
  42                 if (a==',') a=0;
  43                 if (a>0) {
  44                         b=strlen(aaa);
  45                         aaa[b]=a;
  46                         aaa[b+1]=0;
  47                         }
  48                 } while(a>0);
  49         do {
  50                 a=getc(fp);
  51                 if (a==10) a=0;
  52                 if (a>0) {
  53                         b=strlen(bbb);
  54                         bbb[b]=a;
  55                         bbb[b+1]=0;
  56                         }
  57                 } while(a>0);
  58         if (a<0) {
  59                 fclose(fp);
  60                 goto DETYPE;
  61                 }
  62         if (strucmp(name,aaa)) goto GNA;
  63         fclose(fp);
  64         strcpy(name,bbb);
  65         /* cprintf("*** Mail is being forwarded to %s\n",name); */
  66
  67 DETYPE: /* determine local or remote type, see citadel.h */
  68         for (a=0; a<strlen(name); ++a) if (name[a]=='!') return(M_INTERNET);
  69         for (a=0; a<strlen(name); ++a)
  70                 if (name[a]=='@')
  71                         for (b=a; b<strlen(name); ++b)
  72                                 if (name[b]=='.') return(M_INTERNET);
  73         b=0; for (a=0; a<strlen(name); ++a) if (name[a]=='@') ++b;
  74         if (b>1) {
  75                 /* cprintf("Too many @'s in address\n"); */
  76                 return(M_ERROR);
  77                 }
  78         if (b==1) {
  79                 for (a=0; a<strlen(name); ++a)
  80                         if (name[a]=='@') strcpy(bbb,&name[a+1]);
  81                 while (bbb[0]==32) strcpy(bbb,&bbb[1]);
  82                 fp = fopen("network/mail.sysinfo","r");
  83                 if (fp==NULL) return(M_ERROR);
  84 GETSN:          do {
  85                         a=getstring(fp,aaa);
  86                         } while ((a>=0)&&(strucmp(aaa,bbb)));
  87                 a=getstring(fp,aaa);
  88                 if (!strncmp(aaa,"use ",4)) {
  89                         strcpy(bbb,&aaa[4]);
  90                         fseek(fp,0L,0);
  91                         goto GETSN;
  92                         }
  93                 fclose(fp);
  94                 if (!strncmp(aaa,"uum",3)) {
  95                         strcpy(bbb,name);
  96                         for (a=0; a<strlen(bbb); ++a) {
  97                                 if (bbb[a]=='@') bbb[a]=0;
  98                                 if (bbb[a]==' ') bbb[a]='_';
  99                                 }
 100                         while(bbb[strlen(bbb)-1]=='_') bbb[strlen(bbb)-1]=0;
 101                         sprintf(name,&aaa[4],bbb);
 102                         return(M_INTERNET);
 103                         }
 104                 if (!strncmp(aaa,"bin",3)) {
 105                         strcpy(aaa,name); strcpy(bbb,name);
 106                         while (aaa[strlen(aaa)-1]!='@') aaa[strlen(aaa)-1]=0;
 107                         aaa[strlen(aaa)-1]=0;
 108                         while (aaa[strlen(aaa)-1]==' ') aaa[strlen(aaa)-1]=0;
 109                         while (bbb[0]!='@') strcpy(bbb,&bbb[1]);
 110                         strcpy(bbb,&bbb[1]);
 111                         while (bbb[0]==' ') strcpy(bbb,&bbb[1]);
 112                         sprintf(name,"%s @%s",aaa,bbb);
 113                         return(M_BINARY);
 114                         }
 115                 return(M_ERROR);
 116                 }
 117         return(M_LOCAL);
 118         }
 119
 120
 121 void get_mm(void) {
 122         FILE *fp;
 123
 124         fp=fopen("citadel.control","r");
 125         fread((char *)&CitControl,sizeof(struct CitControl),1,fp);
 126         fclose(fp);
 127         }
 128
 129 /*
 130  * cmd_msgs()  -  get list of message #'s in this room
 131  */
 132 void cmd_msgs(char *cmdbuf)
 133 {
 134         int a;
 135         int mode;
 136         char which[256];
 137         int cm_howmany;
 138         long cm_gt;
 139
 140         extract(which,cmdbuf,0);
 141
 142         mode = MSGS_ALL;
 143         strcat(which,"   ");
 144         if (!struncmp(which,"OLD",3))   mode = MSGS_OLD;
 145         if (!struncmp(which,"NEW",3))   mode = MSGS_NEW;
 146         if (!struncmp(which,"FIRST",5)) {
 147                 mode = MSGS_FIRST;
 148                 cm_howmany = extract_int(cmdbuf,1);
 149                 }
 150         if (!struncmp(which,"LAST",4))  {
 151                 mode = MSGS_LAST;
 152                 cm_howmany = extract_int(cmdbuf,1);
 153                 }
 154         if (!struncmp(which,"GT",2))    {
 155                 mode = MSGS_GT;
 156                 cm_gt = extract_long(cmdbuf,1);
 157                 }
 158
 159         if ((!(CC->logged_in))&&(!(CC->internal_pgm))) {
 160                 cprintf("%d not logged in\n",ERROR+NOT_LOGGED_IN);
 161                 return;
 162                 }
 163         if (CC->curr_rm < 0) {
 164                 cprintf("%d no room\n",ERROR);
 165                 return;
 166                 }
 167         get_mm();
 168         get_fullroom(&CC->fullroom,CC->curr_rm);
 169         getuser(&CC->usersupp,CC->curr_user);
 170         cprintf("%d messages...\n",LISTING_FOLLOWS);
 171         for (a=0; a<MSGSPERRM; ++a)
 172                if ((CC->fullroom.FRnum[a] >=0)
 173                && (
 174
 175 (mode==MSGS_ALL)
 176 || ((mode==MSGS_OLD) && (CC->fullroom.FRnum[a] <= CC->usersupp.lastseen[CC->curr_rm]))
 177 || ((mode==MSGS_NEW) && (CC->fullroom.FRnum[a] > CC->usersupp.lastseen[CC->curr_rm]))
 178 || ((mode==MSGS_NEW) && (CC->fullroom.FRnum[a] >= CC->usersupp.lastseen[CC->curr_rm])
 179                      && (CC->usersupp.flags & US_LASTOLD))
 180 || ((mode==MSGS_LAST)&& (a>=(MSGSPERRM-cm_howmany)))
 181 || ((mode==MSGS_FIRST)&&(a<cm_howmany))
 182 || ((mode==MSGS_GT) && (CC->fullroom.FRnum[a] > cm_gt))
 183
 184                         )
 185                 )
 186                 cprintf("%ld\n",CC->fullroom.FRnum[a]);
 187         cprintf("000\n");
 188         }
 189
 190
 191
 192 /*
 193  * help_subst()  -  support routine for help file viewer
 194  */
 195 void help_subst(char *strbuf, char *source, char *dest)
 196 {
 197         char workbuf[256];
 198         int p;
 199
 200         while (p=pattern2(strbuf,source), (p>=0)) {
 201                 strcpy(workbuf,&strbuf[p+strlen(source)]);
 202                 strcpy(&strbuf[p],dest);
 203                 strcat(strbuf,workbuf);
 204                 }
 205         }
 206
 207
 208 void do_help_subst(char *buffer)
 209 {
 210         char buf2[16];
 211
 212         help_subst(buffer,"^nodename",config.c_nodename);
 213         help_subst(buffer,"^humannode",config.c_humannode);
 214         help_subst(buffer,"^fqdn",config.c_fqdn);
 215         help_subst(buffer,"^username",CC->usersupp.fullname);
 216         sprintf(buf2,"%ld",CC->usersupp.usernum);
 217         help_subst(buffer,"^usernum",buf2);
 218         help_subst(buffer,"^sysadm",config.c_sysadm);
 219         help_subst(buffer,"^variantname",CITADEL);
 220         sprintf(buf2,"%d",config.c_maxsessions);
 221         help_subst(buffer,"^maxsessions",buf2);
 222         }
 223
 224
 225
 226 /*
 227  * memfmout()  -  Citadel text formatter and paginator.
 228  *             Although the original purpose of this routine was to format
 229  *             text to the reader's screen width, all we're really using it
 230  *             for here is to format text out to 80 columns before sending it
 231  *             to the client.  The client software may reformat it again.
 232  */
 233 void memfmout(int width, char *mptr, char subst)
 234                         /* screen width to use */
 235                         /* where are we going to get our text from? */
 236                         /* nonzero if we should use hypertext mode */
 237         {
 238         int a,b,c,real,old;
 239         CIT_UBYTE ch;
 240         char aaa[140];
 241         char buffer[256];
 242
 243         strcpy(aaa,""); old=255;
 244         strcpy(buffer,"");
 245         c=1; /* c is the current pos */
 246
 247 FMTA:   if (subst) {
 248                 while (ch=*mptr, ((ch!=0) && (strlen(buffer)<126) )) {
 249                         ch=*mptr++;
 250                         buffer[strlen(buffer)+1] = 0;
 251                         buffer[strlen(buffer)] = ch;
 252                         }
 253
 254                 if (buffer[0]=='^') do_help_subst(buffer);
 255
 256                 buffer[strlen(buffer)+1] = 0;
 257                 a=buffer[0];
 258                 strcpy(buffer,&buffer[1]);
 259                 }
 260
 261         else ch=*mptr++;
 262
 263         old=real;
 264         real=ch;
 265         if (ch<=0) goto FMTEND;
 266
 267         if ( ((ch==13)||(ch==10)) && (old!=13) && (old!=10) ) ch=32;
 268         if ( ((old==13)||(old==10)) && (isspace(real)) ) {
 269                 cprintf("\n");
 270                 c=1;
 271                 }
 272         if (ch>126) goto FMTA;
 273
 274         if (ch>32) {
 275         if ( ((strlen(aaa)+c)>(width-5)) && (strlen(aaa)>(width-5)) )
 276                 { cprintf("\n%s",aaa); c=strlen(aaa); aaa[0]=0;
 277                 }
 278          b=strlen(aaa); aaa[b]=ch; aaa[b+1]=0; }
 279         if (ch==32) {
 280                 if ((strlen(aaa)+c)>(width-5)) {
 281                         cprintf("\n");
 282                         c=1;
 283                         }
 284                 cprintf("%s ",aaa); ++c; c=c+strlen(aaa);
 285                 strcpy(aaa,"");
 286                 goto FMTA;
 287                 }
 288         if ((ch==13)||(ch==10)) {
 289                 cprintf("%s\n",aaa);
 290                 c=1;
 291                 strcpy(aaa,"");
 292                 goto FMTA;
 293                 }
 294         goto FMTA;
 295
 296 FMTEND: cprintf("\n");
 297         }
 298
 299
 300 /*
 301  * get a message off disk.
 302  *
 303  */
 304 void output_message(char *msgid, int mode, int headers_only)
 305 {
 306         long msg_num;
 307         int a,och,len;
 308         CIT_UBYTE ch, rch;
 309         FILE *msg;
 310         CIT_UBYTE format_type,anon_flag;
 311         char buf[1024];
 312         long msg_len;
 313         int msg_ok = 0;
 314
 315         struct cdbdata *dmsgtext;
 316         char *mptr;
 317
 318         /* buffers needed for RFC822 translation */
 319         char suser[256];
 320         char luser[256];
 321         char snode[256];
 322         char lnode[256];
 323         char mid[256];
 324         long xtime;
 325         /* */
 326
 327         msg_num = atol(msgid);
 328
 329
 330         if ((!(CC->logged_in))&&(!(CC->internal_pgm))) {
 331                 cprintf("%d Not logged in.\n",ERROR+NOT_LOGGED_IN);
 332                 return;
 333                 }
 334         if (CC->curr_rm < 0) {
 335                 cprintf("%d No room selected.\n",ERROR);
 336                 return;
 337                 }
 338
 339         /* We used to need to check in the current room's fullroom table
 340          * to determine where the message's disk position.  We no longer need
 341          * to do this, but we do it anyway as a security measure, in order to
 342          * prevent rogue clients from reading messages not in the current room.
 343          */
 344         for (a=0; a<MSGSPERRM; ++a) if (CC->fullroom.FRnum[a] == msg_num) {
 345                 msg_ok = 1;
 346                 }
 347         if (!msg_ok) {
 348                 cprintf("%d Message %ld is not in this room.\n",
 349                         ERROR, msg_num);
 350                 return;
 351                 }
 352
 353
 354         dmsgtext = cdb_fetch(CDB_MSGMAIN, &msg_num, sizeof(long));
 355
 356         if (dmsgtext == NULL) {
 357                 cprintf("%d Can't find message %ld\n", ERROR+INTERNAL_ERROR);
 358                 return;
 359                 }
 360
 361         msg_len = (long) dmsgtext->len;
 362         mptr = dmsgtext->ptr;
 363         lprintf(9, "Returned message length is %ld\n", msg_len);
 364
 365         /* this loop spews out the whole message if we're doing raw format */
 366         if (mode == MT_RAW) {
 367                 cprintf("%d %ld\n", BINARY_FOLLOWS, msg_len);
 368                 client_write(dmsgtext->ptr, (int) msg_len);
 369                 cdb_free(dmsgtext);
 370                 return;
 371                 }
 372
 373         /* Otherwise, we'll start parsing it field by field... */
 374         ch = *mptr++;
 375         if (ch != 255) {
 376                 cprintf("%d Illegal message format on disk\n",
 377                         ERROR+INTERNAL_ERROR);
 378                 cdb_free(dmsgtext);
 379                 return;
 380                 }
 381
 382         anon_flag = *mptr++;
 383         format_type = *mptr++;
 384
 385         /* now for the user-mode message reading loops */
 386         cprintf("%d Message %ld:\n",LISTING_FOLLOWS,msg_num);
 387
 388         if (mode == MT_CITADEL) cprintf("type=%d\n",format_type);
 389
 390         if ( (anon_flag == MES_ANON) && (mode == MT_CITADEL) ) {
 391                 cprintf("nhdr=yes\n");
 392                 }
 393
 394         /* begin header processing loop for Citadel message format */
 395
 396         if (mode == MT_CITADEL) while(ch = *mptr++, (ch!='M' && ch!=0)) {
 397                 buf[0] = 0;
 398                 do {
 399                         buf[strlen(buf)+1] = 0;
 400                         rch = *mptr++;
 401                         buf[strlen(buf)] = rch;
 402                         } while (rch > 0);
 403
 404                 if (ch=='A') {
 405                         if (anon_flag==MES_ANON) cprintf("from=****");
 406                         else if (anon_flag==MES_AN2) cprintf("from=anonymous");
 407                         else cprintf("from=%s",buf);
 408                         if ((is_room_aide()) && ((anon_flag == MES_ANON)
 409                            || (anon_flag == MES_AN2)))
 410                                 cprintf(" [%s]",buf);
 411                         cprintf("\n");
 412                         }
 413                 else if (ch=='P') cprintf("path=%s\n",buf);
 414                 else if (ch=='U') cprintf("subj=%s\n",buf);
 415                 else if (ch=='I') cprintf("msgn=%s\n",buf);
 416                 else if (ch=='H') cprintf("hnod=%s\n",buf);
 417                 else if (ch=='O') cprintf("room=%s\n",buf);
 418                 else if (ch=='N') cprintf("node=%s\n",buf);
 419                 else if (ch=='R') cprintf("rcpt=%s\n",buf);
 420                 else if (ch=='T') cprintf("time=%s\n",buf);
 421                 /* else cprintf("fld%c=%s\n",ch,buf); */
 422                 }
 423
 424         /* begin header processing loop for RFC822 transfer format */
 425
 426         strcpy(suser, "");
 427         strcpy(luser, "");
 428         strcpy(snode, NODENAME);
 429         strcpy(lnode, HUMANNODE);
 430         if (mode == MT_RFC822) while(ch = *mptr++, (ch!='M' && ch!=0)) {
 431                 buf[0] = 0;
 432                 do {
 433                         buf[strlen(buf)+1] = 0;
 434                         rch = *mptr++;
 435                         buf[strlen(buf)] = rch;
 436                         } while (rch > 0);
 437
 438                 if (ch=='A') strcpy(luser, buf);
 439                 else if (ch=='P') {
 440                         cprintf("Path: %s\n",buf);
 441                         for (a=0; a<strlen(buf); ++a) {
 442                                 if (buf[a] == '!') {
 443                                         strcpy(buf,&buf[a+1]);
 444                                         a=0;
 445                                         }
 446                                 }
 447                         strcpy(suser, buf);
 448                         }
 449                 else if (ch=='U') cprintf("Subject: %s\n",buf);
 450                 else if (ch=='I') strcpy(mid, buf);
 451                 else if (ch=='H') strcpy(lnode, buf);
 452                 else if (ch=='O') cprintf("X-Citadel-Room: %s\n",buf);
 453                 else if (ch=='N') strcpy(snode, buf);
 454                 else if (ch=='R') cprintf("To: %s\n",buf);
 455                 else if (ch=='T')  {
 456                         xtime = atol(buf);
 457                         cprintf("Date: %s", asctime(localtime(&xtime)));
 458                         }
 459                 }
 460
 461         if (mode == MT_RFC822) {
 462                 if (!strucmp(snode, NODENAME)) {
 463                         strcpy(snode, FQDN);
 464                         }
 465                 cprintf("Message-ID: <%s@%s>\n", mid, snode);
 466                 cprintf("From: %s@%s (%s)\n",
 467                         suser, snode, luser);
 468                 cprintf("Organization: %s\n", lnode);
 469                 }
 470
 471         /* end header processing loop ... at this point, we're in the text */
 472
 473         if (ch==0) {
 474                 cprintf("text\n*** ?Message truncated\n000\n");
 475                 fclose(msg);
 476                 cdb_free(dmsgtext);
 477                 return;
 478                 }
 479
 480         if (headers_only) {
 481                 /* give 'em a length */
 482                 msg_len = 0L;
 483                 while(och=ch, ch = *mptr++, ch>0) {
 484                         ++msg_len;
 485                         }
 486                 cprintf("mlen=%ld\n", msg_len);
 487                 cprintf("000\n");
 488                 fclose(msg);
 489                 cdb_free(dmsgtext);
 490                 return;
 491                 }
 492
 493         /* signify start of msg text */
 494         if (mode == MT_CITADEL) cprintf("text\n");
 495         if (mode == MT_RFC822) cprintf("\n");
 496
 497         /* If the format type on disk is 1 (fixed-format), then we want
 498          * everything to be output completely literally ... regardless of
 499          * what message transfer format is in use.
 500          */
 501         if (format_type == 1) {
 502                 och = 0;
 503                 len = 0;
 504                 while(och=ch, ch = *mptr++, ch>0) {
 505                         if (ch == 13) ch = 10;
 506                         ++len;
 507                         if ((ch!=10)||(och!=10)) {
 508                                 cprintf("%c", ch);
 509                                 if (ch==10) len = 0;
 510                                 }
 511                         if (len>=250) {
 512                                 len = 0;
 513                                 /* cprintf("%c", ch); */
 514                                 cprintf("%c", 10);
 515                                 }
 516                         }
 517                 if (len!=0) cprintf("%c", 10);
 518                 }
 519         /* If the message on disk is format 0 (Citadel vari-format), we
 520          * output using the formatter at 80 columns.  This is the final output
 521          * form if the transfer format is RFC822, but if the transfer format
 522          * is Citadel proprietary, it'll still work, because the indentation
 523          * for new paragraphs is correct and the client will reformat the
 524          * message to the reader's screen width.
 525          */
 526         if (format_type == 0) {
 527                 memfmout(80,mptr,0);
 528                 }
 529
 530
 531         /* now we're done */
 532         cprintf("000\n");
 533         cdb_free(dmsgtext);
 534         }
 535
 536
 537 /*
 538  * display a message (mode 0 - Citadel proprietary)
 539  */
 540 void cmd_msg0(char *cmdbuf)
 541 {
 542         char msgid[256];
 543         int headers_only = 0;
 544
 545         extract(msgid,cmdbuf,0);
 546         headers_only = extract_int(cmdbuf,1);
 547
 548         output_message(msgid,MT_CITADEL,headers_only);
 549         }
 550
 551
 552 /*
 553  * display a message (mode 2 - RFC822)
 554  */
 555 void cmd_msg2(char *cmdbuf)
 556 {
 557         char msgid[256];
 558         int headers_only = 0;
 559
 560         extract(msgid,cmdbuf,0);
 561         headers_only = extract_int(cmdbuf,1);
 562
 563         output_message(msgid,MT_RFC822,headers_only);
 564         }
 565
 566 /*
 567  * display a message (mode 3 - IGnet raw format - internal programs only)
 568  */
 569 void cmd_msg3(char *cmdbuf)
 570 {
 571         char msgid[256];
 572         int headers_only = 0;
 573
 574         if (CC->internal_pgm == 0) {
 575                 cprintf("%d This command is for internal programs only.\n",
 576                         ERROR);
 577                 return;
 578                 }
 579
 580         extract(msgid,cmdbuf,0);
 581         headers_only = extract_int(cmdbuf,1);
 582
 583         output_message(msgid,MT_RAW,headers_only);
 584         }
 585
 586
 587
 588 /*
 589  * message base operation to send a message to the master file
 590  */
 591 void send_message(char *filename, struct smreturn *retbuf, int generate_id)
 592                                 /* tempfilename of proper message */
 593                                 /* return information */
 594                                 /* set to 1 to generate an 'I' field */
 595 {
 596
 597         int file,a;
 598         FILE *fp;
 599         long newmsgid;
 600
 601         char *message_in_memory;
 602         size_t templen;
 603
 604         fp = fopen(filename, "rb");
 605
 606         /* Measure the message */
 607         lprintf(9, "Measuring the message\n");
 608         fseek(fp, 0L, SEEK_END);
 609         templen = ftell(fp);
 610
 611         /* Now read it into memory */
 612         lprintf(9, "Allocating %ld bytes\n", templen);
 613         message_in_memory = (char *) malloc(templen);
 614         if (message_in_memory == NULL) {
 615                 lprintf(2, "Can't allocate memory to save message!\n");
 616                 fclose(fp);
 617                 retbuf->smnumber = 0L;
 618                 retbuf->smpos = 0L;
 619                 return;
 620                 }
 621
 622         lprintf(9, "Reading it into memory\n");
 623         fseek(fp, 0L, SEEK_SET);
 624         fread(message_in_memory, templen, 1, fp);
 625         fclose(fp);
 626
 627         /* Get a new message number */
 628         newmsgid = get_new_message_number();
 629
 630         /* Write our little bundle of joy into the message base */
 631
 632         lprintf(9, "Storing message %ld\n", newmsgid);
 633         begin_critical_section(S_MSGMAIN);
 634         if ( cdb_store(CDB_MSGMAIN, &newmsgid, sizeof(long),
 635                         message_in_memory, templen) < 0 ) {
 636                 lprintf(2, "Can't store message\n");
 637                 retbuf->smnumber = 0L;
 638                 retbuf->smpos = 0L;
 639                 return;
 640                 }
 641         end_critical_section(S_MSGMAIN);
 642         free(message_in_memory);
 643
 644
 645         /* Finally, return the pointers */
 646         retbuf->smnumber = newmsgid;
 647         retbuf->smpos= 1L; /* FIX we really won't be needing this */
 648         }
 649
 650
 651
 652
 653
 654
 655 void loadtroom(void) {
 656         struct quickroom qrbuf;
 657         int a;
 658         unsigned newflags;
 659
 660         /* first try to locate the twit room */
 661         for (a=0; a<MAXROOMS; ++a) {
 662                 getroom(&qrbuf,a);
 663                 if (!strucmp(qrbuf.QRname,config.c_twitroom)) {
 664                         twitroom = a;
 665                         return;
 666                         }
 667                 }
 668
 669         /* if not found, try to create it  -  put it in the last slot */
 670         twitroom = get_free_room_slot(-1);
 671         if (twitroom>=0) {
 672                 newflags = create_room(twitroom,config.c_twitroom,0,"",0);
 673                 return;
 674                 }
 675
 676         /* as a last resort, point to Aide> */
 677         twitroom = 2;
 678         }
 679
 680
 681 /*
 682  * this is a simple file copy routine.
 683  */
 684 void copy_file(char *from, char *to)
 685 {
 686         FILE *ffp,*tfp;
 687         int a;
 688
 689         ffp=fopen(from,"r");
 690         if (ffp==NULL) return;
 691         tfp=fopen(to,"w");
 692         if (tfp==NULL) {
 693                 fclose(ffp);
 694                 return;
 695                 }
 696         while (a=getc(ffp), a>=0) {
 697                 putc(a,tfp);
 698                 }
 699         fclose(ffp);
 700         fclose(tfp);
 701         return;
 702         }
 703
 704
 705
 706 /*
 707  * message base operation to save a message and install its pointers
 708  */
 709 void save_message(char *mtmp,   /* file containing proper message */
 710                 char *rec,      /* Recipient (if mail) */
 711                 char mtsflag,   /* 0 for normal, 1 to force Aide> room */
 712                 int mailtype,   /* local or remote type, see citadel.h */
 713                 int generate_id) /* set to 1 to generate an 'I' field */
 714 {
 715         int a,e;
 716         struct usersupp tempUS;
 717         char aaa[100];
 718         struct smreturn smreturn;
 719         int hold_rm;
 720
 721         send_message(mtmp,&smreturn,generate_id);
 722         hold_rm=(-1);
 723
 724         /* if the user is a twit, move to the twit room for posting */
 725         if (TWITDETECT) if (CC->usersupp.axlevel==2) {
 726                 if (twitroom<0) loadtroom();
 727                 hold_rm=CC->curr_rm;
 728                 CC->curr_rm=twitroom;
 729                 }
 730
 731         /* and if this message is destined for Aide> then go there */
 732         if (mtsflag) {
 733                 hold_rm=CC->curr_rm;
 734                 CC->curr_rm=2;
 735                 }
 736
 737         /* this call to usergoto() changes rooms if necessary.  It also
 738            causes the latest fullroom structure to be read into memory */
 739         usergoto(CC->curr_rm,0);
 740
 741         /* Store the message pointer, but NOT for sent mail! */
 742         if (CC->curr_rm != 1) {
 743
 744                 /* read in the quickroom record, obtaining a lock... */
 745                 lgetroom(&CC->quickroom,CC->curr_rm);
 746                 get_fullroom(&CC->fullroom,CC->curr_rm);
 747
 748                 /* Delete the oldest message if there is one */
 749                 if (CC->fullroom.FRnum[0] != 0L) {
 750                         cdb_delete(CDB_MSGMAIN,
 751                                 &CC->fullroom.FRnum[0], sizeof(long));
 752                         }
 753
 754                 /* Now scroll... */
 755                 for (a=0; a<(MSGSPERRM-1); ++a) {
 756                         CC->fullroom.FRnum[a]=CC->fullroom.FRnum[a+1];
 757                         }
 758
 759                 /* ...and add the new message */
 760                 CC->fullroom.FRnum[MSGSPERRM-1]=smreturn.smnumber;
 761
 762                 /* Write it back to disk. */
 763                 put_fullroom(&CC->fullroom,CC->curr_rm);
 764
 765                 /* update quickroom */
 766                 CC->quickroom.QRhighest=CC->fullroom.FRnum[MSGSPERRM-1];
 767                 lputroom(&CC->quickroom,CC->curr_rm);
 768                 }
 769
 770         /* Bump this user's messages posted counter.  Also, if the user is a
 771            twit, give them access to the twit room. */
 772         lgetuser(&CC->usersupp,CC->curr_user);
 773         CC->usersupp.posted = CC->usersupp.posted + 1;
 774         if (CC->curr_rm==twitroom) CC->usersupp.generation[twitroom]=CC->quickroom.QRgen;
 775         lputuser(&CC->usersupp,CC->curr_user);
 776
 777         /* if mail, there's still more to do, if not, skip it */
 778         if ((CC->curr_rm!=1)||(mtsflag)) goto ENTFIN;
 779
 780         /* network mail - send a copy to the network program */
 781         if (mailtype!=M_LOCAL) {
 782                 sprintf(aaa,"./network/spoolin/nm.%d",getpid());
 783                 copy_file(mtmp,aaa);
 784                 system("exec nohup ./netproc >/dev/null 2>&1 &");
 785                 }
 786
 787         /* local mail - put a copy in the recipient's mailbox */
 788         if (mailtype==M_LOCAL) {
 789                 if (lgetuser(&tempUS,rec)==0) {
 790                         if (tempUS.mailnum[0] != 0L) {
 791                                 cdb_delete(CDB_MSGMAIN, &tempUS.mailnum[0],
 792                                         sizeof(long));
 793                                 }
 794                         for (e=0; e<(MAILSLOTS-1); ++e) {
 795                                 tempUS.mailnum[e]=tempUS.mailnum[e+1];
 796                                 }
 797                         tempUS.mailnum[MAILSLOTS-1]=smreturn.smnumber;
 798                         lputuser(&tempUS,rec);
 799                         }
 800                 }
 801
 802         /* if we've posted in a room other than the current room, then we
 803            have to now go back to the current room... */
 804 ENTFIN: if (hold_rm!=(-1)) {
 805                 usergoto(hold_rm,0);
 806                 }
 807         unlink(mtmp);           /* delete the temporary file */
 808         }
 809
 810
 811 /*
 812  * generate an administrative message and post it in the Aide> room
 813  */
 814 void aide_message(char *text)
 815 {
 816         long now;
 817         FILE *fp;
 818
 819         time(&now);
 820         fp=fopen(CC->temp,"wb");
 821         fprintf(fp,"%c%c%c",255,MES_NORMAL,0);
 822         fprintf(fp,"Psysop%c",0);
 823         fprintf(fp,"T%ld%c",now,0);
 824         fprintf(fp,"ACitadel%c",0);
 825         fprintf(fp,"OAide%c",0);
 826         fprintf(fp,"N%s%c",NODENAME,0);
 827         fprintf(fp,"M%s\n%c",text,0);
 828         fclose(fp);
 829         save_message(CC->temp,"",1,M_LOCAL,1);
 830         syslog(LOG_NOTICE,text);
 831         }
 832
 833
 834
 835 /*
 836  * build a binary message to be saved on disk
 837  */
 838 void make_message(char *filename, struct usersupp *author, char *recipient, char *room, int type, int net_type, int format_type, char *fake_name)
 839                         /* temporary file name */
 840                           /* author's usersupp structure */
 841                         /* NULL if it's not mail */
 842                         /* room where it's going */
 843                         /* see MES_ types in header file */
 844                         /* local or remote type, see citadel.h */
 845                         /* format type (see citadel.h) */
 846 {
 847         FILE *fp;
 848         int a;
 849         long now;
 850         char dest_node[32];
 851         char buf[256];
 852
 853         /* don't confuse the poor folks if it's not routed mail. */
 854         strcpy(dest_node,"");
 855
 856         /* if net_type is M_BINARY, split out the destination node */
 857         if (net_type == M_BINARY) {
 858                 strcpy(dest_node,NODENAME);
 859                 for (a=0; a<strlen(recipient); ++a) {
 860                         if (recipient[a]=='@') {
 861                                 recipient[a]=0;
 862                                 strcpy(dest_node,&recipient[a+1]);
 863                                 }
 864                         }
 865                 }
 866
 867         /* if net_type is M_INTERNET, set the dest node to 'internet' */
 868         if (net_type == M_INTERNET) {
 869                 strcpy(dest_node,"internet");
 870                 }
 871
 872         while (isspace(recipient[strlen(recipient)-1]))
 873                 recipient[strlen(recipient)-1] = 0;
 874
 875         time(&now);
 876         fp=fopen(filename,"w");
 877         putc(255,fp);
 878         putc(type,fp);  /* Normal or anonymous, see MES_ flags */
 879         putc(format_type,fp);   /* Formatted or unformatted */
 880         fprintf(fp,"Pcit%ld%c",author->usernum,0);      /* path */
 881         fprintf(fp,"T%ld%c",now,0);                     /* date/time */
 882         if (fake_name[0])
 883            fprintf(fp,"A%s%c",fake_name,0);
 884         else
 885            fprintf(fp,"A%s%c",author->fullname,0);      /* author */
 886         fprintf(fp,"O%s%c",CC->quickroom.QRname,0);     /* room */
 887         fprintf(fp,"N%s%c",NODENAME,0);                 /* nodename */
 888         fprintf(fp,"H%s%c",HUMANNODE,0);                /* human nodename */
 889
 890         if (recipient[0]!=0) fprintf(fp,"R%s%c",recipient,0);
 891         if (dest_node[0]!=0) fprintf(fp,"D%s%c",dest_node,0);
 892
 893         putc('M',fp);
 894
 895         while (client_gets(buf), strcmp(buf,"000"))
 896         {
 897            fprintf(fp,"%s\n",buf);
 898         }
 899         syslog(LOG_INFO, "Closing message");
 900         putc(0,fp);
 901         fclose(fp);
 902         }
 903
 904
 905
 906
 907
 908 /*
 909  * message entry  -  mode 0 (normal) <bc>
 910  */
 911 void cmd_ent0(char *entargs)
 912 {
 913         int post = 0;
 914         char recipient[256];
 915         int anon_flag = 0;
 916         int format_type = 0;
 917         char newusername[256];          /* <bc> */
 918
 919         int a,b,e;
 920         int mtsflag = 0;
 921         struct usersupp tempUS;
 922         char buf[256];
 923
 924         post = extract_int(entargs,0);
 925         extract(recipient,entargs,1);
 926         anon_flag = extract_int(entargs,2);
 927         format_type = extract_int(entargs,3);
 928
 929         /* first check to make sure the request is valid. */
 930
 931         if (!(CC->logged_in)) {
 932                 cprintf("%d Not logged in.\n",ERROR+NOT_LOGGED_IN);
 933                 return;
 934                 }
 935         if (CC->curr_rm < 0) {
 936                 cprintf("%d No room selected.\n",ERROR);
 937                 return;
 938                 }
 939         if ((CC->usersupp.axlevel<2)&&(CC->curr_rm!=1)) {
 940                 cprintf("%d Need to be validated to enter (except in Mail> to sysop)\n",
 941                         ERROR+HIGHER_ACCESS_REQUIRED);
 942                 return;
 943                 }
 944         if ((CC->usersupp.axlevel<4)&&(CC->quickroom.QRflags&QR_NETWORK)) {
 945                 cprintf("%d Need net privileges to enter here.\n",
 946                         ERROR+HIGHER_ACCESS_REQUIRED);
 947                 return;
 948                 }
 949         if ((CC->usersupp.axlevel<6)&&(CC->quickroom.QRflags&QR_READONLY)) {
 950                 cprintf("%d Sorry, this is a read-only room.\n",
 951                         ERROR+HIGHER_ACCESS_REQUIRED);
 952                 return;
 953                 }
 954
 955         mtsflag=0;
 956
 957
 958         if (post==2) {                  /* <bc> */
 959            if (CC->usersupp.axlevel<6)
 960            {
 961               cprintf("%d\nYou don't have sufficient permission to do an aide post.\n", ERROR+HIGHER_ACCESS_REQUIRED);
 962               return;
 963            }
 964            extract(newusername,entargs,4);
 965            bzero(CC->fake_postname, 32);
 966            strcpy(CC->fake_postname, newusername);
 967            cprintf("%d Ok\n",OK);
 968            return;
 969         }
 970
 971         CC->cs_flags |= CS_POSTING;
 972
 973         buf[0]=0;
 974         if (CC->curr_rm==1) {
 975                 if (CC->usersupp.axlevel>=2) {
 976                         strcpy(buf,recipient);
 977                         }
 978                 else strcpy(buf,"sysop");
 979                 lprintf(9, "aliasing...\n");
 980                 e=alias(buf);                   /* alias and mail type */
 981                 lprintf(9,"...type is %d\n", e);
 982                 if ((buf[0]==0) || (e==M_ERROR)) {
 983                         cprintf("%d Unknown address - cannot send message.\n",
 984                                 ERROR+NO_SUCH_USER);
 985                         return;
 986                         }
 987                 if ((e!=M_LOCAL)&&(CC->usersupp.axlevel<4)) {
 988                         cprintf("%d Net privileges required for network mail.\n",
 989                                 ERROR+HIGHER_ACCESS_REQUIRED);
 990                         return;
 991                         }
 992                 if ((RESTRICT_INTERNET==1)&&(e==M_INTERNET)
 993                    &&((CC->usersupp.flags&US_INTERNET)==0)
 994                    &&(!CC->internal_pgm) ) {
 995                         cprintf("%d You don't have access to Internet mail.\n",
 996                                 ERROR+HIGHER_ACCESS_REQUIRED);
 997                         return;
 998                         }
 999                 if (!strucmp(buf,"sysop")) {
1000                         mtsflag=1;
1001                         goto SKFALL;
1002                         }
1003                 if (e!=M_LOCAL) goto SKFALL;    /* don't search local file  */
1004                 if (!strucmp(buf,CC->usersupp.fullname)) {
1005                         cprintf("%d Can't send mail to yourself!\n",
1006                                 ERROR+NO_SUCH_USER);
1007                         return;
1008                         }
1009
1010                 /* Check to make sure the user exists; also get the correct
1011                 * upper/lower casing of the name.
1012                 */
1013                 lprintf(9, "checking validity of %s\n", buf);
1014                 a = getuser(&tempUS,buf);
1015                 lprintf(9, "getuser() returned %d\n", a);
1016                 if (a != 0) {
1017                         cprintf("%d No such user.\n",ERROR+NO_SUCH_USER);
1018                         return;
1019                         }
1020                 strcpy(buf,tempUS.fullname);
1021                 }
1022
1023 SKFALL: b=MES_NORMAL;
1024         if (CC->quickroom.QRflags&QR_ANONONLY) b=MES_ANON;
1025         if (CC->quickroom.QRflags&QR_ANON2) {
1026                 if (anon_flag==1) b=MES_AN2;
1027                 }
1028         if (CC->curr_rm!=1) buf[0]=0;
1029
1030         /* If we're only checking the validity of the request, return
1031          * success without creating the message.
1032          */
1033         if (post==0) {
1034                 cprintf("%d %s\n",OK,buf);
1035                 return;
1036                 }
1037
1038         cprintf("%d send message\n",SEND_LISTING);
1039         if (CC->fake_postname[0])
1040            make_message(CC->temp,&CC->usersupp,buf,CC->quickroom.QRname,b,e,format_type, CC->fake_postname);
1041         else
1042            if (CC->fake_username[0])
1043               make_message(CC->temp,&CC->usersupp,buf,CC->quickroom.QRname,b,e,format_type, CC->fake_username);
1044            else
1045               make_message(CC->temp,&CC->usersupp,buf,CC->quickroom.QRname,b,e,format_type, "");
1046         save_message(CC->temp,buf,mtsflag,e,1);
1047         CC->fake_postname[0]='\0';
1048         return;
1049         }
1050
1051
1052
1053 /*
1054  * message entry - mode 3 (raw)
1055  */
1056 void cmd_ent3(char *entargs)
1057 {
1058         char recp[256];
1059         char buf[256];
1060         int a, e;
1061         struct usersupp tempUS;
1062         long msglen;
1063         long bloklen;
1064         FILE *fp;
1065
1066         if (CC->internal_pgm == 0) {
1067                 cprintf("%d This command is for internal programs only.\n",
1068                         ERROR);
1069                 return;
1070                 }
1071
1072         if (CC->curr_rm < 0) {
1073                 cprintf("%d No room selected.\n",ERROR);
1074                 return;
1075                 }
1076
1077         if (CC->curr_rm == 1) { /* If we're in Mail, check the recipient */
1078                 extract(recp, entargs, 1);
1079                 lprintf(9, "aliasing...\n");
1080                 e=alias(recp);                  /* alias and mail type */
1081                 lprintf(9,"...type is %d\n", e);
1082                 if ((buf[0]==0) || (e==M_ERROR)) {
1083                         cprintf("%d Unknown address - cannot send message.\n",
1084                                 ERROR+NO_SUCH_USER);
1085                         return;
1086                         }
1087                 if (e == M_LOCAL) {
1088                         a = getuser(&tempUS,recp);
1089                         if (a!=0) {
1090                                 cprintf("%d No such user.\n", ERROR+NO_SUCH_USER);
1091                                 return;
1092                                 }
1093                         }
1094                 }
1095
1096         /* At this point, message has been approved. */
1097         if (extract_int(entargs, 0) == 0) {
1098                 cprintf("%d OK to send\n", OK);
1099                 return;
1100                 }
1101
1102         /* open a temp file to hold the message */
1103         fp = fopen(CC->temp, "wb");
1104         if (fp == NULL) {
1105                 cprintf("%d Cannot open %s: %s\n",
1106                         ERROR + INTERNAL_ERROR,
1107                         CC->temp, strerror(errno) );
1108                 return;
1109                 }
1110
1111         msglen = extract_long(entargs, 2);
1112         cprintf("%d %ld\n", SEND_BINARY, msglen);
1113         while(msglen > 0L) {
1114                 bloklen = ((msglen >= 255L) ? 255 : msglen);
1115                 client_read(buf, (int)bloklen );
1116                 fwrite(buf, (int)bloklen, 1, fp);
1117                 msglen = msglen - bloklen;
1118                 }
1119         fclose(fp);
1120
1121         save_message(CC->temp, recp, 0, e, 0);
1122         }
1123
1124
1125 /*
1126  * Delete message from current room
1127  */
1128 void cmd_dele(char *delstr)
1129 {
1130         long delnum;
1131         int a,ok;
1132
1133         getuser(&CC->usersupp,CC->curr_user);
1134         if ((CC->usersupp.axlevel < 6)
1135            && (CC->usersupp.usernum != CC->quickroom.QRroomaide)) {
1136                 cprintf("%d Higher access required.\n",
1137                         ERROR+HIGHER_ACCESS_REQUIRED);
1138                 return;
1139                 }
1140
1141         delnum = atol(delstr);
1142         if (CC->curr_rm==1) {
1143                 cprintf("%d Can't delete mail.\n",ERROR);
1144                 return;
1145                 }
1146
1147         /* get room records, obtaining a lock... */
1148         lgetroom(&CC->quickroom,CC->curr_rm);
1149         get_fullroom(&CC->fullroom,CC->curr_rm);
1150
1151         ok = 0;
1152         for (a=0; a<MSGSPERRM; ++a)
1153                 if (CC->fullroom.FRnum[a]==delnum) {
1154                         CC->fullroom.FRnum[a]=0L;
1155                         ok = 1;
1156                         }
1157
1158         sort_fullroom(&CC->fullroom);
1159         CC->quickroom.QRhighest = CC->fullroom.FRnum[MSGSPERRM-1];
1160
1161         put_fullroom(&CC->fullroom,CC->curr_rm);
1162         lputroom(&CC->quickroom,CC->curr_rm);
1163         if (ok==1) {
1164                 cdb_delete(CDB_MSGMAIN, &delnum, sizeof(long));
1165                 cprintf("%d Message deleted.\n",OK);
1166                 }
1167         else cprintf("%d No message %ld.\n",ERROR,delnum);
1168         }
1169
1170
1171 /*
1172  * move a message to another room
1173  */
1174 void cmd_move(char *args)
1175 {
1176         long num;
1177         char targ[32];
1178         int a;
1179         int targ_slot;
1180         struct quickroom qtemp;
1181         struct fullroom ftemp;
1182         int foundit;
1183
1184         num = extract_long(args,0);
1185         extract(targ,args,1);
1186
1187         if (CC->curr_rm < 0) {
1188                 cprintf("%d no room\n",ERROR);
1189                 return;
1190                 }
1191
1192         getuser(&CC->usersupp,CC->curr_user);
1193         if ((CC->usersupp.axlevel < 6)
1194            && (CC->usersupp.usernum != CC->quickroom.QRroomaide)) {
1195                 cprintf("%d Higher access required.\n",
1196                         ERROR+HIGHER_ACCESS_REQUIRED);
1197                 return;
1198                 }
1199
1200         targ_slot = (-1);
1201         for (a=0; a<MAXROOMS; ++a) {
1202                 getroom(&qtemp,a);
1203                 if (!strucmp(qtemp.QRname,targ)) {
1204                         targ_slot = a;
1205                         a = MAXROOMS;
1206                         }
1207                 }
1208         if (targ_slot < 0) {
1209                 cprintf("%d '%s' does not exist.\n",ERROR,targ);
1210                 return;
1211                 }
1212
1213         /* yank the message out of the current room... */
1214         lgetroom(&CC->quickroom,CC->curr_rm);
1215         get_fullroom(&CC->fullroom,CC->curr_rm);
1216
1217         foundit = 0;
1218         for (a=0; a<MSGSPERRM; ++a) {
1219                 if (CC->fullroom.FRnum[a] == num) {
1220                         foundit = 1;
1221                         CC->fullroom.FRnum[a] = 0L;
1222                         }
1223                 }
1224         if (foundit) {
1225                 sort_fullroom(&CC->fullroom);
1226                 put_fullroom(&CC->fullroom,CC->curr_rm);
1227                 CC->quickroom.QRhighest = CC->fullroom.FRnum[MSGSPERRM-1];
1228                 }
1229         lputroom(&CC->quickroom,CC->curr_rm);
1230         if (!foundit) {
1231                 cprintf("%d msg %ld does not exist.\n",ERROR,num);
1232                 return;
1233                 }
1234
1235         lgetroom(&qtemp,targ_slot);
1236         get_fullroom(&ftemp,targ_slot);
1237         if (CC->fullroom.FRnum[0] != 0L) {
1238                 cdb_delete(CDB_MSGMAIN, &CC->fullroom.FRnum[0], sizeof(long));
1239                 }
1240         for (a=0; a<MSGSPERRM-1; ++a) {
1241                 ftemp.FRnum[a]=ftemp.FRnum[a+1];
1242                 }
1243         ftemp.FRnum[MSGSPERRM-1] = num;
1244         sort_fullroom(&ftemp);
1245         qtemp.QRhighest = ftemp.FRnum[MSGSPERRM-1];
1246         put_fullroom(&ftemp,targ_slot);
1247         lputroom(&qtemp,targ_slot);
1248         cprintf("%d ok\n",OK);
1249         }