citadel/modules/ctdlproto/serv_file.c

   1 /*
   2  * Server functions which handle file transfers and room directories.
   3  *
   4  * Copyright (c) 1987-2015 by the citadel.org team
   5  *
   6  * This program is open source software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 3.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #include <stdio.h>
  16 #include <libcitadel.h>
  17 #include <dirent.h>
  18
  19 #include "ctdl_module.h"
  20 #include "citserver.h"
  21 #include "support.h"
  22 #include "config.h"
  23 #include "user_ops.h"
  24
  25
  26 /*
  27  * Server command to delete a file from a room's directory
  28  */
  29 void cmd_delf(char *filename)
  30 {
  31         char pathname[64];
  32         int a;
  33
  34         if (CtdlAccessCheck(ac_room_aide))
  35                 return;
  36
  37         if ((CC->room.QRflags & QR_DIRECTORY) == 0) {
  38                 cprintf("%d No directory in this room.\n",
  39                         ERROR + NOT_HERE);
  40                 return;
  41         }
  42
  43         if (IsEmptyStr(filename)) {
  44                 cprintf("%d You must specify a file name.\n",
  45                         ERROR + FILE_NOT_FOUND);
  46                 return;
  47         }
  48         for (a = 0; !IsEmptyStr(&filename[a]); ++a) {
  49                 if ( (filename[a] == '/') || (filename[a] == '\\') ) {
  50                         filename[a] = '_';
  51                 }
  52         }
  53         snprintf(pathname, sizeof pathname,
  54                          "%s/%s/%s",
  55                          ctdl_file_dir,
  56                          CC->room.QRdirname, filename);
  57         a = unlink(pathname);
  58         if (a == 0) {
  59                 cprintf("%d File '%s' deleted.\n", CIT_OK, pathname);
  60         }
  61         else {
  62                 cprintf("%d File '%s' not found.\n",
  63                         ERROR + FILE_NOT_FOUND, pathname);
  64         }
  65 }
  66
  67
  68
  69
  70 /*
  71  * move a file from one room directory to another
  72  */
  73 void cmd_movf(char *cmdbuf)
  74 {
  75         char filename[PATH_MAX];
  76         char pathname[PATH_MAX];
  77         char newpath[PATH_MAX];
  78         char newroom[ROOMNAMELEN];
  79         char buf[PATH_MAX];
  80         int a;
  81         struct ctdlroom qrbuf;
  82
  83         extract_token(filename, cmdbuf, 0, '|', sizeof filename);
  84         extract_token(newroom, cmdbuf, 1, '|', sizeof newroom);
  85
  86         if (CtdlAccessCheck(ac_room_aide)) return;
  87
  88         if ((CC->room.QRflags & QR_DIRECTORY) == 0) {
  89                 cprintf("%d No directory in this room.\n",
  90                         ERROR + NOT_HERE);
  91                 return;
  92         }
  93
  94         if (IsEmptyStr(filename)) {
  95                 cprintf("%d You must specify a file name.\n",
  96                         ERROR + FILE_NOT_FOUND);
  97                 return;
  98         }
  99
 100         for (a = 0; !IsEmptyStr(&filename[a]); ++a) {
 101                 if ( (filename[a] == '/') || (filename[a] == '\\') ) {
 102                         filename[a] = '_';
 103                 }
 104         }
 105         snprintf(pathname, sizeof pathname, "./files/%s/%s",
 106                  CC->room.QRdirname, filename);
 107         if (access(pathname, 0) != 0) {
 108                 cprintf("%d File '%s' not found.\n",
 109                         ERROR + FILE_NOT_FOUND, pathname);
 110                 return;
 111         }
 112
 113         if (CtdlGetRoom(&qrbuf, newroom) != 0) {
 114                 cprintf("%d '%s' does not exist.\n", ERROR + ROOM_NOT_FOUND, newroom);
 115                 return;
 116         }
 117         if ((qrbuf.QRflags & QR_DIRECTORY) == 0) {
 118                 cprintf("%d '%s' is not a directory room.\n",
 119                         ERROR + NOT_HERE, qrbuf.QRname);
 120                 return;
 121         }
 122         snprintf(newpath, sizeof newpath, "./files/%s/%s", qrbuf.QRdirname,
 123                  filename);
 124         if (link(pathname, newpath) != 0) {
 125                 cprintf("%d Couldn't move file: %s\n", ERROR + INTERNAL_ERROR,
 126                         strerror(errno));
 127                 return;
 128         }
 129         unlink(pathname);
 130
 131         /* this is a crude method of copying the file description */
 132         snprintf(buf, sizeof buf,
 133                  "cat ./files/%s/filedir |grep \"%s\" >>./files/%s/filedir",
 134                  CC->room.QRdirname, filename, qrbuf.QRdirname);
 135         system(buf);
 136         cprintf("%d File '%s' has been moved.\n", CIT_OK, filename);
 137 }
 138
 139
 140 /*
 141  * This code is common to all commands which open a file for downloading,
 142  * regardless of whether it's a file from the directory, an image, a network
 143  * spool file, a MIME attachment, etc.
 144  * It examines the file and displays the OK result code and some information
 145  * about the file.  NOTE: this stuff is Unix dependent.
 146  */
 147 void OpenCmdResult(char *filename, const char *mime_type)
 148 {
 149         struct stat statbuf;
 150         time_t modtime;
 151         long filesize;
 152
 153         fstat(fileno(CC->download_fp), &statbuf);
 154         CC->download_fp_total = statbuf.st_size;
 155         filesize = (long) statbuf.st_size;
 156         modtime = (time_t) statbuf.st_mtime;
 157
 158         cprintf("%d %ld|%ld|%s|%s\n",
 159                 CIT_OK, filesize, (long)modtime, filename, mime_type);
 160 }
 161
 162
 163 /*
 164  * open a file for downloading
 165  */
 166 void cmd_open(char *cmdbuf)
 167 {
 168         char filename[256];
 169         char pathname[PATH_MAX];
 170         int a;
 171
 172         extract_token(filename, cmdbuf, 0, '|', sizeof filename);
 173
 174         if (CtdlAccessCheck(ac_logged_in)) return;
 175
 176         if ((CC->room.QRflags & QR_DIRECTORY) == 0) {
 177                 cprintf("%d No directory in this room.\n",
 178                         ERROR + NOT_HERE);
 179                 return;
 180         }
 181
 182         if (IsEmptyStr(filename)) {
 183                 cprintf("%d You must specify a file name.\n",
 184                         ERROR + FILE_NOT_FOUND);
 185                 return;
 186         }
 187         if (strstr(filename, "../") != NULL)
 188         {
 189                 cprintf("%d syntax error.\n",
 190                         ERROR + ILLEGAL_VALUE);
 191                 return;
 192         }
 193
 194         if (CC->download_fp != NULL) {
 195                 cprintf("%d You already have a download file open.\n",
 196                         ERROR + RESOURCE_BUSY);
 197                 return;
 198         }
 199
 200         for (a = 0; !IsEmptyStr(&filename[a]); ++a) {
 201                 if ( (filename[a] == '/') || (filename[a] == '\\') ) {
 202                         filename[a] = '_';
 203                 }
 204         }
 205
 206         snprintf(pathname, sizeof pathname,
 207                          "%s/%s/%s",
 208                          ctdl_file_dir,
 209                          CC->room.QRdirname, filename);
 210         CC->download_fp = fopen(pathname, "r");
 211
 212         if (CC->download_fp == NULL) {
 213                 cprintf("%d cannot open %s: %s\n",
 214                         ERROR + INTERNAL_ERROR, pathname, strerror(errno));
 215                 return;
 216         }
 217
 218         OpenCmdResult(filename, "application/octet-stream");
 219 }
 220
 221 /*
 222  * open an image file
 223  */
 224 void cmd_oimg(char *cmdbuf)
 225 {
 226         char filename[256];
 227         char pathname[PATH_MAX];
 228         char MimeTestBuf[32];
 229         struct ctdluser usbuf;
 230         char which_user[USERNAME_SIZE];
 231         int which_floor;
 232         int a;
 233         int rv;
 234
 235         extract_token(filename, cmdbuf, 0, '|', sizeof filename);
 236
 237         if (IsEmptyStr(filename)) {
 238                 cprintf("%d You must specify a file name.\n",
 239                         ERROR + FILE_NOT_FOUND);
 240                 return;
 241         }
 242
 243         if (CC->download_fp != NULL) {
 244                 cprintf("%d You already have a download file open.\n",
 245                         ERROR + RESOURCE_BUSY);
 246                 return;
 247         }
 248
 249         if (!strcasecmp(filename, "_floorpic_")) {
 250                 which_floor = extract_int(cmdbuf, 1);
 251                 snprintf(pathname, sizeof pathname, "%s/floor.%d", ctdl_image_dir, which_floor);
 252         }
 253         else if (!strcasecmp(filename, "_roompic_")) {
 254                 assoc_file_name(pathname, sizeof pathname, &CC->room, ctdl_image_dir);
 255         }
 256         else {
 257                 for (a = 0; !IsEmptyStr(&filename[a]); ++a) {
 258                         filename[a] = tolower(filename[a]);
 259                         if ( (filename[a] == '/') || (filename[a] == '\\') ) {
 260                                 filename[a] = '_';
 261                         }
 262                 }
 263                 if (strstr(filename, "../") != NULL)
 264                 {
 265                         cprintf("%d syntax error.\n",
 266                                 ERROR + ILLEGAL_VALUE);
 267                         return;
 268                 }
 269
 270                 snprintf(pathname, sizeof pathname,
 271                                  "%s/%s",
 272                                  ctdl_image_dir,
 273                                  filename);
 274         }
 275
 276         CC->download_fp = fopen(pathname, "rb");
 277         if (CC->download_fp == NULL) {
 278                 strcat(pathname, ".gif");
 279                 CC->download_fp = fopen(pathname, "rb");
 280         }
 281         if (CC->download_fp == NULL) {
 282                 cprintf("%d Cannot open %s: %s\n",
 283                         ERROR + FILE_NOT_FOUND, pathname, strerror(errno));
 284                 return;
 285         }
 286         rv = fread(&MimeTestBuf[0], 1, 32, CC->download_fp);
 287         if (rv == -1) {
 288                 cprintf("%d Cannot access %s: %s\n",
 289                         ERROR + FILE_NOT_FOUND, pathname, strerror(errno));
 290                 return;
 291         }
 292
 293         rewind (CC->download_fp);
 294         OpenCmdResult(pathname, GuessMimeType(&MimeTestBuf[0], 32));
 295 }
 296
 297
 298 /*
 299  * open a file for uploading
 300  */
 301 void cmd_uopn(char *cmdbuf)
 302 {
 303         int a;
 304
 305         extract_token(CC->upl_file, cmdbuf, 0, '|', sizeof CC->upl_file);
 306         extract_token(CC->upl_mimetype, cmdbuf, 1, '|', sizeof CC->upl_mimetype);
 307         extract_token(CC->upl_comment, cmdbuf, 2, '|', sizeof CC->upl_comment);
 308
 309         if (CtdlAccessCheck(ac_logged_in)) return;
 310
 311         if ((CC->room.QRflags & QR_DIRECTORY) == 0) {
 312                 cprintf("%d No directory in this room.\n",
 313                         ERROR + NOT_HERE);
 314                 return;
 315         }
 316
 317         if (IsEmptyStr(CC->upl_file)) {
 318                 cprintf("%d You must specify a file name.\n",
 319                         ERROR + FILE_NOT_FOUND);
 320                 return;
 321         }
 322
 323         if (CC->upload_fp != NULL) {
 324                 cprintf("%d You already have a upload file open.\n",
 325                         ERROR + RESOURCE_BUSY);
 326                 return;
 327         }
 328
 329         for (a = 0; !IsEmptyStr(&CC->upl_file[a]); ++a) {
 330                 if ( (CC->upl_file[a] == '/') || (CC->upl_file[a] == '\\') ) {
 331                         CC->upl_file[a] = '_';
 332                 }
 333         }
 334         snprintf(CC->upl_path, sizeof CC->upl_path,
 335                          "%s/%s/%s",
 336                          ctdl_file_dir,
 337                          CC->room.QRdirname, CC->upl_file);
 338         snprintf(CC->upl_filedir, sizeof CC->upl_filedir,
 339                          "%s/%s/filedir",
 340                          ctdl_file_dir,
 341                          CC->room.QRdirname);
 342
 343         CC->upload_fp = fopen(CC->upl_path, "r");
 344         if (CC->upload_fp != NULL) {
 345                 fclose(CC->upload_fp);
 346                 CC->upload_fp = NULL;
 347                 cprintf("%d '%s' already exists\n",
 348                         ERROR + ALREADY_EXISTS, CC->upl_path);
 349                 return;
 350         }
 351
 352         CC->upload_fp = fopen(CC->upl_path, "wb");
 353         if (CC->upload_fp == NULL) {
 354                 cprintf("%d Cannot open %s: %s\n",
 355                         ERROR + INTERNAL_ERROR, CC->upl_path, strerror(errno));
 356                 return;
 357         }
 358         cprintf("%d Ok\n", CIT_OK);
 359 }
 360
 361
 362
 363 /*
 364  * open an image file for uploading
 365  */
 366 void cmd_uimg(char *cmdbuf)
 367 {
 368         int is_this_for_real;
 369         char basenm[256];
 370         int which_floor;
 371         int a;
 372
 373         if (num_parms(cmdbuf) < 2) {
 374                 cprintf("%d Usage error.\n", ERROR + ILLEGAL_VALUE);
 375                 return;
 376         }
 377
 378         is_this_for_real = extract_int(cmdbuf, 0);
 379         extract_token(CC->upl_mimetype, cmdbuf, 1, '|', sizeof CC->upl_mimetype);
 380         extract_token(basenm, cmdbuf, 2, '|', sizeof basenm);
 381         if (CC->upload_fp != NULL) {
 382                 cprintf("%d You already have an upload file open.\n",
 383                         ERROR + RESOURCE_BUSY);
 384                 return;
 385         }
 386
 387         strcpy(CC->upl_path, "");
 388
 389         for (a = 0; !IsEmptyStr(&basenm[a]); ++a) {
 390                 basenm[a] = tolower(basenm[a]);
 391                 if ( (basenm[a] == '/') || (basenm[a] == '\\') ) {
 392                         basenm[a] = '_';
 393                 }
 394         }
 395
 396         if (CC->user.axlevel >= AxAideU) {
 397                 snprintf(CC->upl_path, sizeof CC->upl_path,
 398                                  "%s/%s",
 399                                  ctdl_image_dir,
 400                                  basenm);
 401         }
 402
 403         if (!strcasecmp(basenm, "_userpic_")) {
 404                 snprintf(CC->upl_path, sizeof CC->upl_path,
 405                                  "%s/%ld.gif",
 406                                  ctdl_usrpic_dir,
 407                                  CC->user.usernum);
 408         }
 409
 410         if ((!strcasecmp(basenm, "_floorpic_"))
 411             && (CC->user.axlevel >= AxAideU)) {
 412                 which_floor = extract_int(cmdbuf, 2);
 413                 snprintf(CC->upl_path, sizeof CC->upl_path,
 414                                  "%s/floor.%d.gif",
 415                                  ctdl_image_dir,
 416                                  which_floor);
 417         }
 418
 419         if ((!strcasecmp(basenm, "_roompic_")) && (is_room_aide())) {
 420                 assoc_file_name(CC->upl_path, sizeof CC->upl_path, &CC->room, ctdl_image_dir);
 421         }
 422
 423         if (IsEmptyStr(CC->upl_path)) {
 424                 cprintf("%d Higher access required.\n",
 425                         ERROR + HIGHER_ACCESS_REQUIRED);
 426                 return;
 427         }
 428
 429         if (is_this_for_real == 0) {
 430                 cprintf("%d Ok to send image\n", CIT_OK);
 431                 return;
 432         }
 433
 434         CC->upload_fp = fopen(CC->upl_path, "wb");
 435         if (CC->upload_fp == NULL) {
 436                 cprintf("%d Cannot open %s: %s\n",
 437                         ERROR + INTERNAL_ERROR, CC->upl_path, strerror(errno));
 438                 return;
 439         }
 440         cprintf("%d Ok\n", CIT_OK);
 441         CC->upload_type = UPL_IMAGE;
 442 }
 443
 444
 445 /*
 446  * close the download file
 447  */
 448 void cmd_clos(char *cmdbuf)
 449 {
 450         char buf[256];
 451
 452         if (CC->download_fp == NULL) {
 453                 cprintf("%d You don't have a download file open.\n",
 454                         ERROR + RESOURCE_NOT_OPEN);
 455                 return;
 456         }
 457
 458         fclose(CC->download_fp);
 459         CC->download_fp = NULL;
 460
 461         if (CC->dl_is_net == 1) {
 462                 CC->dl_is_net = 0;
 463                 snprintf(buf, sizeof buf,
 464                                  "%s/%s",
 465                                  ctdl_netout_dir,
 466                                  CC->net_node);
 467                 unlink(buf);
 468         }
 469
 470         cprintf("%d Ok\n", CIT_OK);
 471 }
 472
 473
 474 /*
 475  * abort an upload
 476  */
 477 void abort_upl(CitContext *who)
 478 {
 479         if (who->upload_fp != NULL) {
 480                 fclose(who->upload_fp);
 481                 who->upload_fp = NULL;
 482                 unlink(CC->upl_path);
 483         }
 484 }
 485
 486
 487
 488 /*
 489  * close the upload file
 490  */
 491 void cmd_ucls(char *cmd)
 492 {
 493         struct CitContext *CCC = CC;
 494         FILE *fp;
 495         char upload_notice[512];
 496         static int seq = 0;
 497
 498         if (CCC->upload_fp == NULL) {
 499                 cprintf("%d You don't have an upload file open.\n", ERROR + RESOURCE_NOT_OPEN);
 500                 return;
 501         }
 502
 503         fclose(CC->upload_fp);
 504         CCC->upload_fp = NULL;
 505
 506         if ((!strcasecmp(cmd, "1")) && (CCC->upload_type != UPL_FILE)) {
 507                 cprintf("%d Upload completed.\n", CIT_OK);
 508
 509                 if (CCC->upload_type == UPL_NET) {
 510                         char final_filename[PATH_MAX];
 511                         snprintf(final_filename, sizeof final_filename,
 512                                 "%s/%s.%04lx.%04x",
 513                                 ctdl_netin_dir,
 514                                 CCC->net_node,
 515                                 (long)getpid(),
 516                                 ++seq
 517                         );
 518
 519                         if (link(CCC->upl_path, final_filename) == 0) {
 520                                 CTDL_syslog(LOG_INFO, "UCLS: updoaded %s",
 521                                        final_filename);
 522                                 unlink(CCC->upl_path);
 523                         }
 524                         else {
 525                                 CTDL_syslog(LOG_INFO, "Cannot link %s to %s: %s",
 526                                             CCC->upl_path, final_filename, strerror(errno)
 527                                 );
 528                         }
 529
 530
 531                         /* FIXME ... here we need to trigger a network run */
 532                 }
 533
 534                 CCC->upload_type = UPL_FILE;
 535                 return;
 536         }
 537
 538         if (!strcasecmp(cmd, "1")) {
 539                 cprintf("%d File '%s' saved.\n", CIT_OK, CCC->upl_path);
 540                 fp = fopen(CCC->upl_filedir, "a");
 541                 if (fp == NULL) {
 542                         fp = fopen(CCC->upl_filedir, "w");
 543                 }
 544                 if (fp != NULL) {
 545                         fprintf(fp, "%s %s %s\n", CCC->upl_file,
 546                                 CCC->upl_mimetype,
 547                                 CCC->upl_comment);
 548                         fclose(fp);
 549                 }
 550
 551                 if ((CCC->room.QRflags2 & QR2_NOUPLMSG) == 0) {
 552                         /* put together an upload notice */
 553                         snprintf(upload_notice, sizeof upload_notice,
 554                                  "NEW UPLOAD: '%s'\n %s\n%s\n",
 555                                  CCC->upl_file,
 556                                  CCC->upl_comment,
 557                                  CCC->upl_mimetype);
 558                         quickie_message(CCC->curr_user, NULL, NULL, CCC->room.QRname,
 559                                         upload_notice, 0, NULL);
 560                 }
 561         } else {
 562                 abort_upl(CCC);
 563                 cprintf("%d File '%s' aborted.\n", CIT_OK, CCC->upl_path);
 564         }
 565 }
 566
 567
 568 /*
 569  * read from the download file
 570  */
 571 void cmd_read(char *cmdbuf)
 572 {
 573         long start_pos;
 574         size_t bytes;
 575         char buf[SIZ];
 576         int rc;
 577
 578         /* The client will transmit its requested offset and byte count */
 579         start_pos = extract_long(cmdbuf, 0);
 580         bytes = extract_int(cmdbuf, 1);
 581         if ((start_pos < 0) || (bytes <= 0)) {
 582                 cprintf("%d you have to specify a value > 0.\n", ERROR + ILLEGAL_VALUE);
 583                 return;
 584         }
 585
 586         if (CC->download_fp == NULL) {
 587                 cprintf("%d You don't have a download file open.\n",
 588                         ERROR + RESOURCE_NOT_OPEN);
 589                 return;
 590         }
 591
 592         /* If necessary, reduce the byte count to the size of our buffer */
 593         if (bytes > sizeof(buf)) {
 594                 bytes = sizeof(buf);
 595         }
 596
 597         rc = fseek(CC->download_fp, start_pos, 0);
 598         if (rc < 0) {
 599                 struct CitContext *CCC = CC;
 600                 cprintf("%d your file is smaller then %ld.\n", ERROR + ILLEGAL_VALUE, start_pos);
 601                 CTDL_syslog(LOG_ERR, "your file %s is smaller then %ld. [%s]\n",
 602                             CC->upl_path,
 603                             start_pos,
 604                             strerror(errno));
 605
 606                 return;
 607         }
 608         bytes = fread(buf, 1, bytes, CC->download_fp);
 609         if (bytes > 0) {
 610                 /* Tell the client the actual byte count and transmit it */
 611                 cprintf("%d %d\n", BINARY_FOLLOWS, (int)bytes);
 612                 client_write(buf, bytes);
 613         }
 614         else {
 615                 cprintf("%d %s\n", ERROR, strerror(errno));
 616         }
 617 }
 618
 619
 620 /*
 621  * write to the upload file
 622  */
 623 void cmd_writ(char *cmdbuf)
 624 {
 625         struct CitContext *CCC = CC;
 626         int bytes;
 627         char *buf;
 628         int rv;
 629
 630         unbuffer_output();
 631
 632         bytes = extract_int(cmdbuf, 0);
 633
 634         if (CCC->upload_fp == NULL) {
 635                 cprintf("%d You don't have an upload file open.\n", ERROR + RESOURCE_NOT_OPEN);
 636                 return;
 637         }
 638         if (bytes <= 0) {
 639                 cprintf("%d you have to specify a value > 0.\n", ERROR + ILLEGAL_VALUE);
 640                 return;
 641         }
 642
 643         if (bytes > 100000) {
 644                 bytes = 100000;
 645         }
 646
 647         cprintf("%d %d\n", SEND_BINARY, bytes);
 648         buf = malloc(bytes + 1);
 649         client_read(buf, bytes);
 650         rv = fwrite(buf, bytes, 1, CCC->upload_fp);
 651         if (rv == -1) {
 652                 CTDL_syslog(LOG_EMERG, "Couldn't write: %s\n",
 653                             strerror(errno));
 654         }
 655         free(buf);
 656 }
 657
 658
 659
 660
 661 /*
 662  * cmd_ndop() - open a network spool file for downloading
 663  */
 664 void cmd_ndop(char *cmdbuf)
 665 {
 666         struct CitContext *CCC = CC;
 667         char pathname[256];
 668         struct stat statbuf;
 669
 670         if (IsEmptyStr(CCC->net_node)) {
 671                 cprintf("%d Not authenticated as a network node.\n",
 672                         ERROR + NOT_LOGGED_IN);
 673                 return;
 674         }
 675
 676         if (CCC->download_fp != NULL) {
 677                 cprintf("%d You already have a download file open.\n",
 678                         ERROR + RESOURCE_BUSY);
 679                 return;
 680         }
 681
 682         snprintf(pathname, sizeof pathname,
 683                          "%s/%s",
 684                          ctdl_netout_dir,
 685                          CCC->net_node);
 686
 687         /* first open the file in append mode in order to create a
 688          * zero-length file if it doesn't already exist
 689          */
 690         CCC->download_fp = fopen(pathname, "a");
 691         if (CCC->download_fp != NULL)
 692                 fclose(CCC->download_fp);
 693
 694         /* now open it */
 695         CCC->download_fp = fopen(pathname, "r");
 696         if (CCC->download_fp == NULL) {
 697                 cprintf("%d cannot open %s: %s\n",
 698                         ERROR + INTERNAL_ERROR, pathname, strerror(errno));
 699                 return;
 700         }
 701
 702
 703         /* set this flag so other routines know that the download file
 704          * currently open is a network spool file
 705          */
 706         CCC->dl_is_net = 1;
 707
 708         stat(pathname, &statbuf);
 709         CCC->download_fp_total = statbuf.st_size;
 710         cprintf("%d %ld\n", CIT_OK, (long)statbuf.st_size);
 711 }
 712
 713 /*
 714  * cmd_nuop() - open a network spool file for uploading
 715  */
 716 void cmd_nuop(char *cmdbuf)
 717 {
 718         static int seq = 1;
 719
 720         if (IsEmptyStr(CC->net_node)) {
 721                 cprintf("%d Not authenticated as a network node.\n",
 722                         ERROR + NOT_LOGGED_IN);
 723                 return;
 724         }
 725
 726         if (CC->upload_fp != NULL) {
 727                 cprintf("%d You already have an upload file open.\n",
 728                         ERROR + RESOURCE_BUSY);
 729                 return;
 730         }
 731
 732         snprintf(CC->upl_path, sizeof CC->upl_path,
 733                          "%s/%s.%04lx.%04x",
 734                          ctdl_nettmp_dir,
 735                          CC->net_node,
 736                          (long)getpid(),
 737                          ++seq);
 738
 739         CC->upload_fp = fopen(CC->upl_path, "r");
 740         if (CC->upload_fp != NULL) {
 741                 fclose(CC->upload_fp);
 742                 CC->upload_fp = NULL;
 743                 cprintf("%d '%s' already exists\n",
 744                         ERROR + ALREADY_EXISTS, CC->upl_path);
 745                 return;
 746         }
 747
 748         CC->upload_fp = fopen(CC->upl_path, "w");
 749         if (CC->upload_fp == NULL) {
 750                 cprintf("%d Cannot open %s: %s\n",
 751                         ERROR + INTERNAL_ERROR, CC->upl_path, strerror(errno));
 752                 return;
 753         }
 754
 755         CC->upload_type = UPL_NET;
 756         cprintf("%d Ok\n", CIT_OK);
 757 }
 758 void files_logout_hook(void)
 759 {
 760         CitContext *CCC = MyContext();
 761
 762         /*
 763          * If there is a download in progress, abort it.
 764          */
 765         if (CCC->download_fp != NULL) {
 766                 fclose(CCC->download_fp);
 767                 CCC->download_fp = NULL;
 768         }
 769
 770         /*
 771          * If there is an upload in progress, abort it.
 772          */
 773         if (CCC->upload_fp != NULL) {
 774                 abort_upl(CCC);
 775         }
 776
 777 }
 778
 779 /*
 780  * help_subst()  -  support routine for help file viewer
 781  */
 782 void help_subst(char *strbuf, char *source, char *dest)
 783 {
 784         char workbuf[SIZ];
 785         int p;
 786
 787         while (p = pattern2(strbuf, source), (p >= 0)) {
 788                 strcpy(workbuf, &strbuf[p + strlen(source)]);
 789                 strcpy(&strbuf[p], dest);
 790                 strcat(strbuf, workbuf);
 791         }
 792 }
 793
 794 void do_help_subst(char *buffer)
 795 {
 796         char buf2[16];
 797
 798         help_subst(buffer, "^nodename", CtdlGetConfigStr("c_nodename"));
 799         help_subst(buffer, "^humannode", CtdlGetConfigStr("c_humannode"));
 800         help_subst(buffer, "^fqdn", CtdlGetConfigStr("c_fqdn"));
 801         help_subst(buffer, "^username", CC->user.fullname);
 802         snprintf(buf2, sizeof buf2, "%ld", CC->user.usernum);
 803         help_subst(buffer, "^usernum", buf2);
 804         help_subst(buffer, "^sysadm", CtdlGetConfigStr("c_sysadm"));
 805         help_subst(buffer, "^variantname", CITADEL);
 806         help_subst(buffer, "^maxsessions", CtdlGetConfigStr("c_maxsessions"));          // yes it's numeric but str is ok here
 807         help_subst(buffer, "^bbsdir", ctdl_message_dir);
 808 }
 809
 810
 811 typedef const char *ccharp;
 812 /*
 813  * display system messages or help
 814  */
 815 void cmd_mesg(char *mname)
 816 {
 817         FILE *mfp;
 818         char targ[256];
 819         char buf[256];
 820         char buf2[256];
 821         char *dirs[2];
 822         DIR *dp;
 823         struct dirent *d;
 824
 825         extract_token(buf, mname, 0, '|', sizeof buf);
 826
 827         dirs[0] = strdup(ctdl_message_dir);
 828         dirs[1] = strdup(ctdl_hlp_dir);
 829
 830         snprintf(buf2, sizeof buf2, "%s.%d.%d",
 831                 buf, CC->cs_clientdev, CC->cs_clienttyp);
 832
 833         /* If the client requested "?" then produce a listing */
 834         if (!strcmp(buf, "?")) {
 835                 cprintf("%d %s\n", LISTING_FOLLOWS, buf);
 836                 dp = opendir(dirs[1]);
 837                 if (dp != NULL) {
 838                         while (d = readdir(dp), d != NULL) {
 839                                 if (d->d_name[0] != '.') {
 840                                         cprintf(" %s\n", d->d_name);
 841                                 }
 842                         }
 843                         closedir(dp);
 844                 }
 845                 cprintf("000\n");
 846                 free(dirs[0]);
 847                 free(dirs[1]);
 848                 return;
 849         }
 850
 851         /* Otherwise, look for the requested file by name. */
 852         else {
 853                 mesg_locate(targ, sizeof targ, buf2, 2, (const ccharp*)dirs);
 854                 if (IsEmptyStr(targ)) {
 855                         snprintf(buf2, sizeof buf2, "%s.%d",
 856                                                         buf, CC->cs_clientdev);
 857                         mesg_locate(targ, sizeof targ, buf2, 2,
 858                                     (const ccharp*)dirs);
 859                         if (IsEmptyStr(targ)) {
 860                                 mesg_locate(targ, sizeof targ, buf, 2,
 861                                             (const ccharp*)dirs);
 862                         }
 863                 }
 864         }
 865
 866         free(dirs[0]);
 867         free(dirs[1]);
 868
 869         if (IsEmptyStr(targ)) {
 870                 cprintf("%d '%s' not found.  (Searching in %s and %s)\n",
 871                         ERROR + FILE_NOT_FOUND,
 872                         mname,
 873                         ctdl_message_dir,
 874                         ctdl_hlp_dir
 875                 );
 876                 return;
 877         }
 878
 879         mfp = fopen(targ, "r");
 880         if (mfp==NULL) {
 881                 cprintf("%d Cannot open '%s': %s\n",
 882                         ERROR + INTERNAL_ERROR, targ, strerror(errno));
 883                 return;
 884         }
 885         cprintf("%d %s\n", LISTING_FOLLOWS,buf);
 886
 887         while (fgets(buf, (sizeof buf - 1), mfp) != NULL) {
 888                 buf[strlen(buf)-1] = 0;
 889                 do_help_subst(buf);
 890                 cprintf("%s\n",buf);
 891         }
 892
 893         fclose(mfp);
 894         cprintf("000\n");
 895 }
 896
 897
 898 /*
 899  * enter system messages or help
 900  */
 901 void cmd_emsg(char *mname)
 902 {
 903         FILE *mfp;
 904         char targ[256];
 905         char buf[256];
 906         char *dirs[2];
 907         int a;
 908
 909         unbuffer_output();
 910
 911         if (CtdlAccessCheck(ac_aide)) return;
 912
 913         extract_token(buf, mname, 0, '|', sizeof buf);
 914         for (a=0; !IsEmptyStr(&buf[a]); ++a) {          /* security measure */
 915                 if (buf[a] == '/') buf[a] = '.';
 916         }
 917
 918         dirs[0] = strdup(ctdl_message_dir);
 919         dirs[1] = strdup(ctdl_hlp_dir);
 920
 921         mesg_locate(targ, sizeof targ, buf, 2, (const ccharp*)dirs);
 922         free(dirs[0]);
 923         free(dirs[1]);
 924
 925         if (IsEmptyStr(targ)) {
 926                 snprintf(targ, sizeof targ,
 927                                  "%s/%s",
 928                                  ctdl_hlp_dir, buf);
 929         }
 930
 931         mfp = fopen(targ,"w");
 932         if (mfp==NULL) {
 933                 cprintf("%d Cannot open '%s': %s\n",
 934                         ERROR + INTERNAL_ERROR, targ, strerror(errno));
 935                 return;
 936         }
 937         cprintf("%d %s\n", SEND_LISTING, targ);
 938
 939         while (client_getln(buf, sizeof buf) >=0 && strcmp(buf, "000")) {
 940                 fprintf(mfp, "%s\n", buf);
 941         }
 942
 943         fclose(mfp);
 944 }
 945
 946 /*****************************************************************************/
 947 /*                      MODULE INITIALIZATION STUFF                          */
 948 /*****************************************************************************/
 949
 950 CTDL_MODULE_INIT(file_ops)
 951 {
 952         if (!threading) {
 953                 CtdlRegisterSessionHook(files_logout_hook, EVT_LOGOUT, PRIO_LOGOUT + 8);
 954
 955                 CtdlRegisterProtoHook(cmd_delf, "DELF", "Delete a file");
 956                 CtdlRegisterProtoHook(cmd_movf, "MOVF", "Move a file");
 957                 CtdlRegisterProtoHook(cmd_open, "OPEN", "Open a download file transfer");
 958                 CtdlRegisterProtoHook(cmd_clos, "CLOS", "Close a download file transfer");
 959                 CtdlRegisterProtoHook(cmd_uopn, "UOPN", "Open an upload file transfer");
 960                 CtdlRegisterProtoHook(cmd_ucls, "UCLS", "Close an upload file transfer");
 961                 CtdlRegisterProtoHook(cmd_read, "READ", "File transfer read operation");
 962                 CtdlRegisterProtoHook(cmd_writ, "WRIT", "File transfer write operation");
 963                 CtdlRegisterProtoHook(cmd_ndop, "NDOP", "Open a network spool file for download");
 964                 CtdlRegisterProtoHook(cmd_nuop, "NUOP", "Open a network spool file for upload");
 965                 CtdlRegisterProtoHook(cmd_oimg, "OIMG", "Open an image file for download");
 966                 CtdlRegisterProtoHook(cmd_uimg, "UIMG", "Upload an image file");
 967
 968                 CtdlRegisterProtoHook(cmd_mesg, "MESG", "fetch system banners");
 969                 CtdlRegisterProtoHook(cmd_emsg, "EMSG", "submit system banners");
 970         }
 971         /* return our Subversion id for the Log */
 972         return "file_ops";
 973 }