citadel/msgbase.c

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