citadel/file_ops.c

   1 /*
   2  * Server functions which handle file transfers and room directories.
   3  */
   4
   5 #include "sysdep.h"
   6 #include <stdlib.h>
   7 #include <unistd.h>
   8 #include <stdio.h>
   9 #include <fcntl.h>
  10 #include <sys/stat.h>
  11 #include <errno.h>
  12 #include <ctype.h>
  13 #include <string.h>
  14 #include <sys/stat.h>
  15 #include <sys/mman.h>
  16
  17 #if TIME_WITH_SYS_TIME
  18 # include <sys/time.h>
  19 # include <time.h>
  20 #else
  21 # if HAVE_SYS_TIME_H
  22 #  include <sys/time.h>
  23 # else
  24 #  include <time.h>
  25 # endif
  26 #endif
  27
  28 #include <limits.h>
  29 #include <libcitadel.h>
  30 #include "citadel.h"
  31 #include "server.h"
  32 #include "config.h"
  33 #include "file_ops.h"
  34 #include "sysdep_decls.h"
  35 #include "support.h"
  36 #include "room_ops.h"
  37 #include "msgbase.h"
  38 #include "citserver.h"
  39 #include "threads.h"
  40 #include "ctdl_module.h"
  41 #include "user_ops.h"
  42
  43
  44
  45 /*
  46  * Server command to delete a file from a room's directory
  47  */
  48 void cmd_delf(char *filename)
  49 {
  50         char pathname[64];
  51         int a;
  52
  53         if (CtdlAccessCheck(ac_room_aide))
  54                 return;
  55
  56         if ((CC->room.QRflags & QR_DIRECTORY) == 0) {
  57                 cprintf("%d No directory in this room.\n",
  58                         ERROR + NOT_HERE);
  59                 return;
  60         }
  61
  62         if (IsEmptyStr(filename)) {
  63                 cprintf("%d You must specify a file name.\n",
  64                         ERROR + FILE_NOT_FOUND);
  65                 return;
  66         }
  67         for (a = 0; !IsEmptyStr(&filename[a]); ++a) {
  68                 if ( (filename[a] == '/') || (filename[a] == '\\') ) {
  69                         filename[a] = '_';
  70                 }
  71         }
  72         snprintf(pathname, sizeof pathname,
  73                          "%s/%s/%s",
  74                          ctdl_file_dir,
  75                          CC->room.QRdirname, filename);
  76         a = unlink(pathname);
  77         if (a == 0) {
  78                 cprintf("%d File '%s' deleted.\n", CIT_OK, pathname);
  79         }
  80         else {
  81                 cprintf("%d File '%s' not found.\n",
  82                         ERROR + FILE_NOT_FOUND, pathname);
  83         }
  84 }
  85
  86
  87
  88
  89 /*
  90  * move a file from one room directory to another
  91  */
  92 void cmd_movf(char *cmdbuf)
  93 {
  94         char filename[PATH_MAX];
  95         char pathname[PATH_MAX];
  96         char newpath[PATH_MAX];
  97         char newroom[ROOMNAMELEN];
  98         char buf[PATH_MAX];
  99         int a;
 100         struct ctdlroom qrbuf;
 101
 102         extract_token(filename, cmdbuf, 0, '|', sizeof filename);
 103         extract_token(newroom, cmdbuf, 1, '|', sizeof newroom);
 104
 105         if (CtdlAccessCheck(ac_room_aide)) return;
 106
 107         if ((CC->room.QRflags & QR_DIRECTORY) == 0) {
 108                 cprintf("%d No directory in this room.\n",
 109                         ERROR + NOT_HERE);
 110                 return;
 111         }
 112
 113         if (IsEmptyStr(filename)) {
 114                 cprintf("%d You must specify a file name.\n",
 115                         ERROR + FILE_NOT_FOUND);
 116                 return;
 117         }
 118
 119         for (a = 0; !IsEmptyStr(&filename[a]); ++a) {
 120                 if ( (filename[a] == '/') || (filename[a] == '\\') ) {
 121                         filename[a] = '_';
 122                 }
 123         }
 124         snprintf(pathname, sizeof pathname, "./files/%s/%s",
 125                  CC->room.QRdirname, filename);
 126         if (access(pathname, 0) != 0) {
 127                 cprintf("%d File '%s' not found.\n",
 128                         ERROR + FILE_NOT_FOUND, pathname);
 129                 return;
 130         }
 131
 132         if (CtdlGetRoom(&qrbuf, newroom) != 0) {
 133                 cprintf("%d '%s' does not exist.\n", ERROR + ROOM_NOT_FOUND, newroom);
 134                 return;
 135         }
 136         if ((qrbuf.QRflags & QR_DIRECTORY) == 0) {
 137                 cprintf("%d '%s' is not a directory room.\n",
 138                         ERROR + NOT_HERE, qrbuf.QRname);
 139                 return;
 140         }
 141         snprintf(newpath, sizeof newpath, "./files/%s/%s", qrbuf.QRdirname,
 142                  filename);
 143         if (link(pathname, newpath) != 0) {
 144                 cprintf("%d Couldn't move file: %s\n", ERROR + INTERNAL_ERROR,
 145                         strerror(errno));
 146                 return;
 147         }
 148         unlink(pathname);
 149
 150         /* this is a crude method of copying the file description */
 151         snprintf(buf, sizeof buf,
 152                  "cat ./files/%s/filedir |grep \"%s\" >>./files/%s/filedir",
 153                  CC->room.QRdirname, filename, qrbuf.QRdirname);
 154         system(buf);
 155         cprintf("%d File '%s' has been moved.\n", CIT_OK, filename);
 156 }
 157
 158
 159 /*
 160  * This code is common to all commands which open a file for downloading,
 161  * regardless of whether it's a file from the directory, an image, a network
 162  * spool file, a MIME attachment, etc.
 163  * It examines the file and displays the OK result code and some information
 164  * about the file.  NOTE: this stuff is Unix dependent.
 165  */
 166 void OpenCmdResult(char *filename, const char *mime_type)
 167 {
 168         struct stat statbuf;
 169         time_t modtime;
 170         long filesize;
 171
 172         fstat(fileno(CC->download_fp), &statbuf);
 173         CC->download_fp_total = statbuf.st_size;
 174         filesize = (long) statbuf.st_size;
 175         modtime = (time_t) statbuf.st_mtime;
 176
 177         cprintf("%d %ld|%ld|%s|%s\n",
 178                 CIT_OK, filesize, (long)modtime, filename, mime_type);
 179 }
 180
 181
 182 /*
 183  * open a file for downloading
 184  */
 185 void cmd_open(char *cmdbuf)
 186 {
 187         char filename[256];
 188         char pathname[PATH_MAX];
 189         int a;
 190
 191         extract_token(filename, cmdbuf, 0, '|', sizeof filename);
 192
 193         if (CtdlAccessCheck(ac_logged_in)) return;
 194
 195         if ((CC->room.QRflags & QR_DIRECTORY) == 0) {
 196                 cprintf("%d No directory in this room.\n",
 197                         ERROR + NOT_HERE);
 198                 return;
 199         }
 200
 201         if (IsEmptyStr(filename)) {
 202                 cprintf("%d You must specify a file name.\n",
 203                         ERROR + FILE_NOT_FOUND);
 204                 return;
 205         }
 206         if (strstr(filename, "../") != NULL)
 207         {
 208                 cprintf("%d syntax error.\n",
 209                         ERROR + ILLEGAL_VALUE);
 210                 return;
 211         }
 212
 213         if (CC->download_fp != NULL) {
 214                 cprintf("%d You already have a download file open.\n",
 215                         ERROR + RESOURCE_BUSY);
 216                 return;
 217         }
 218
 219         for (a = 0; !IsEmptyStr(&filename[a]); ++a) {
 220                 if ( (filename[a] == '/') || (filename[a] == '\\') ) {
 221                         filename[a] = '_';
 222                 }
 223         }
 224
 225         snprintf(pathname, sizeof pathname,
 226                          "%s/%s/%s",
 227                          ctdl_file_dir,
 228                          CC->room.QRdirname, filename);
 229         CC->download_fp = fopen(pathname, "r");
 230
 231         if (CC->download_fp == NULL) {
 232                 cprintf("%d cannot open %s: %s\n",
 233                         ERROR + INTERNAL_ERROR, pathname, strerror(errno));
 234                 return;
 235         }
 236
 237         OpenCmdResult(filename, "application/octet-stream");
 238 }
 239
 240 /*
 241  * open an image file
 242  */
 243 void cmd_oimg(char *cmdbuf)
 244 {
 245         char filename[256];
 246         char pathname[PATH_MAX];
 247         char MimeTestBuf[32];
 248         struct ctdluser usbuf;
 249         char which_user[USERNAME_SIZE];
 250         int which_floor;
 251         int a;
 252         int rv;
 253
 254         extract_token(filename, cmdbuf, 0, '|', sizeof filename);
 255
 256         if (IsEmptyStr(filename)) {
 257                 cprintf("%d You must specify a file name.\n",
 258                         ERROR + FILE_NOT_FOUND);
 259                 return;
 260         }
 261
 262         if (CC->download_fp != NULL) {
 263                 cprintf("%d You already have a download file open.\n",
 264                         ERROR + RESOURCE_BUSY);
 265                 return;
 266         }
 267
 268         if (!strcasecmp(filename, "_userpic_")) {
 269                 extract_token(which_user, cmdbuf, 1, '|', sizeof which_user);
 270                 if (CtdlGetUser(&usbuf, which_user) != 0) {
 271                         cprintf("%d No such user.\n",
 272                                 ERROR + NO_SUCH_USER);
 273                         return;
 274                 }
 275                 snprintf(pathname, sizeof pathname,
 276                                  "%s/%ld",
 277                                  ctdl_usrpic_dir,
 278                                  usbuf.usernum);
 279         } else if (!strcasecmp(filename, "_floorpic_")) {
 280                 which_floor = extract_int(cmdbuf, 1);
 281                 snprintf(pathname, sizeof pathname,
 282                                  "%s/floor.%d",
 283                                  ctdl_image_dir, which_floor);
 284         } else if (!strcasecmp(filename, "_roompic_")) {
 285                 assoc_file_name(pathname, sizeof pathname, &CC->room, ctdl_image_dir);
 286         } else {
 287                 for (a = 0; !IsEmptyStr(&filename[a]); ++a) {
 288                         filename[a] = tolower(filename[a]);
 289                         if ( (filename[a] == '/') || (filename[a] == '\\') ) {
 290                                 filename[a] = '_';
 291                         }
 292                 }
 293                 if (strstr(filename, "../") != NULL)
 294                 {
 295                         cprintf("%d syntax error.\n",
 296                                 ERROR + ILLEGAL_VALUE);
 297                         return;
 298                 }
 299
 300                 snprintf(pathname, sizeof pathname,
 301                                  "%s/%s",
 302                                  ctdl_image_dir,
 303                                  filename);
 304         }
 305
 306         CC->download_fp = fopen(pathname, "rb");
 307         if (CC->download_fp == NULL) {
 308                 strcat(pathname, ".gif");
 309                 CC->download_fp = fopen(pathname, "rb");
 310         }
 311         if (CC->download_fp == NULL) {
 312                 cprintf("%d Cannot open %s: %s\n",
 313                         ERROR + FILE_NOT_FOUND, pathname, strerror(errno));
 314                 return;
 315         }
 316         rv = fread(&MimeTestBuf[0], 1, 32, CC->download_fp);
 317         if (rv == -1) {
 318                 cprintf("%d Cannot access %s: %s\n",
 319                         ERROR + FILE_NOT_FOUND, pathname, strerror(errno));
 320                 return;
 321         }
 322
 323         rewind (CC->download_fp);
 324         OpenCmdResult(pathname, GuessMimeType(&MimeTestBuf[0], 32));
 325 }
 326
 327 /*
 328  * open a file for uploading
 329  */
 330 void cmd_uopn(char *cmdbuf)
 331 {
 332         int a;
 333
 334         extract_token(CC->upl_file, cmdbuf, 0, '|', sizeof CC->upl_file);
 335         extract_token(CC->upl_mimetype, cmdbuf, 1, '|', sizeof CC->upl_mimetype);
 336         extract_token(CC->upl_comment, cmdbuf, 2, '|', sizeof CC->upl_comment);
 337
 338         if (CtdlAccessCheck(ac_logged_in)) return;
 339
 340         if ((CC->room.QRflags & QR_DIRECTORY) == 0) {
 341                 cprintf("%d No directory in this room.\n",
 342                         ERROR + NOT_HERE);
 343                 return;
 344         }
 345
 346         if (IsEmptyStr(CC->upl_file)) {
 347                 cprintf("%d You must specify a file name.\n",
 348                         ERROR + FILE_NOT_FOUND);
 349                 return;
 350         }
 351
 352         if (CC->upload_fp != NULL) {
 353                 cprintf("%d You already have a upload file open.\n",
 354                         ERROR + RESOURCE_BUSY);
 355                 return;
 356         }
 357
 358         for (a = 0; !IsEmptyStr(&CC->upl_file[a]); ++a) {
 359                 if ( (CC->upl_file[a] == '/') || (CC->upl_file[a] == '\\') ) {
 360                         CC->upl_file[a] = '_';
 361                 }
 362         }
 363         snprintf(CC->upl_path, sizeof CC->upl_path,
 364                          "%s/%s/%s",
 365                          ctdl_file_dir,
 366                          CC->room.QRdirname, CC->upl_file);
 367         snprintf(CC->upl_filedir, sizeof CC->upl_filedir,
 368                          "%s/%s/filedir",
 369                          ctdl_file_dir,
 370                          CC->room.QRdirname);
 371
 372         CC->upload_fp = fopen(CC->upl_path, "r");
 373         if (CC->upload_fp != NULL) {
 374                 fclose(CC->upload_fp);
 375                 CC->upload_fp = NULL;
 376                 cprintf("%d '%s' already exists\n",
 377                         ERROR + ALREADY_EXISTS, CC->upl_path);
 378                 return;
 379         }
 380
 381         CC->upload_fp = fopen(CC->upl_path, "wb");
 382         if (CC->upload_fp == NULL) {
 383                 cprintf("%d Cannot open %s: %s\n",
 384                         ERROR + INTERNAL_ERROR, CC->upl_path, strerror(errno));
 385                 return;
 386         }
 387         cprintf("%d Ok\n", CIT_OK);
 388 }
 389
 390
 391
 392 /*
 393  * open an image file for uploading
 394  */
 395 void cmd_uimg(char *cmdbuf)
 396 {
 397         int is_this_for_real;
 398         char basenm[256];
 399         int which_floor;
 400         int a;
 401
 402         if (num_parms(cmdbuf) < 2) {
 403                 cprintf("%d Usage error.\n", ERROR + ILLEGAL_VALUE);
 404                 return;
 405         }
 406
 407         is_this_for_real = extract_int(cmdbuf, 0);
 408         extract_token(CC->upl_mimetype, cmdbuf, 1, '|', sizeof CC->upl_mimetype);
 409         extract_token(basenm, cmdbuf, 2, '|', sizeof basenm);
 410         if (CC->upload_fp != NULL) {
 411                 cprintf("%d You already have an upload file open.\n",
 412                         ERROR + RESOURCE_BUSY);
 413                 return;
 414         }
 415
 416         strcpy(CC->upl_path, "");
 417
 418         for (a = 0; !IsEmptyStr(&basenm[a]); ++a) {
 419                 basenm[a] = tolower(basenm[a]);
 420                 if ( (basenm[a] == '/') || (basenm[a] == '\\') ) {
 421                         basenm[a] = '_';
 422                 }
 423         }
 424
 425         if (CC->user.axlevel >= AxAideU) {
 426                 snprintf(CC->upl_path, sizeof CC->upl_path,
 427                                  "%s/%s",
 428                                  ctdl_image_dir,
 429                                  basenm);
 430         }
 431
 432         if (!strcasecmp(basenm, "_userpic_")) {
 433                 snprintf(CC->upl_path, sizeof CC->upl_path,
 434                                  "%s/%ld.gif",
 435                                  ctdl_usrpic_dir,
 436                                  CC->user.usernum);
 437         }
 438
 439         if ((!strcasecmp(basenm, "_floorpic_"))
 440             && (CC->user.axlevel >= AxAideU)) {
 441                 which_floor = extract_int(cmdbuf, 2);
 442                 snprintf(CC->upl_path, sizeof CC->upl_path,
 443                                  "%s/floor.%d.gif",
 444                                  ctdl_image_dir,
 445                                  which_floor);
 446         }
 447
 448         if ((!strcasecmp(basenm, "_roompic_")) && (is_room_aide())) {
 449                 assoc_file_name(CC->upl_path, sizeof CC->upl_path, &CC->room, ctdl_image_dir);
 450         }
 451
 452         if (IsEmptyStr(CC->upl_path)) {
 453                 cprintf("%d Higher access required.\n",
 454                         ERROR + HIGHER_ACCESS_REQUIRED);
 455                 return;
 456         }
 457
 458         if (is_this_for_real == 0) {
 459                 cprintf("%d Ok to send image\n", CIT_OK);
 460                 return;
 461         }
 462
 463         CC->upload_fp = fopen(CC->upl_path, "wb");
 464         if (CC->upload_fp == NULL) {
 465                 cprintf("%d Cannot open %s: %s\n",
 466                         ERROR + INTERNAL_ERROR, CC->upl_path, strerror(errno));
 467                 return;
 468         }
 469         cprintf("%d Ok\n", CIT_OK);
 470         CC->upload_type = UPL_IMAGE;
 471 }
 472
 473
 474 /*
 475  * close the download file
 476  */
 477 void cmd_clos(char *cmdbuf)
 478 {
 479         char buf[256];
 480
 481         if (CC->download_fp == NULL) {
 482                 cprintf("%d You don't have a download file open.\n",
 483                         ERROR + RESOURCE_NOT_OPEN);
 484                 return;
 485         }
 486
 487         fclose(CC->download_fp);
 488         CC->download_fp = NULL;
 489
 490         if (CC->dl_is_net == 1) {
 491                 CC->dl_is_net = 0;
 492                 snprintf(buf, sizeof buf,
 493                                  "%s/%s",
 494                                  ctdl_netout_dir,
 495                                  CC->net_node);
 496                 unlink(buf);
 497         }
 498
 499         cprintf("%d Ok\n", CIT_OK);
 500 }
 501
 502
 503 /*
 504  * abort an upload
 505  */
 506 void abort_upl(CitContext *who)
 507 {
 508         if (who->upload_fp != NULL) {
 509                 fclose(who->upload_fp);
 510                 who->upload_fp = NULL;
 511                 unlink(CC->upl_path);
 512         }
 513 }
 514
 515
 516
 517 /*
 518  * close the upload file
 519  */
 520 void cmd_ucls(char *cmd)
 521 {
 522         FILE *fp;
 523         char upload_notice[512];
 524         static int seq = 0;
 525
 526         if (CC->upload_fp == NULL) {
 527                 cprintf("%d You don't have an upload file open.\n", ERROR + RESOURCE_NOT_OPEN);
 528                 return;
 529         }
 530
 531         fclose(CC->upload_fp);
 532         CC->upload_fp = NULL;
 533
 534         if ((!strcasecmp(cmd, "1")) && (CC->upload_type != UPL_FILE)) {
 535                 cprintf("%d Upload completed.\n", CIT_OK);
 536
 537                 if (CC->upload_type == UPL_NET) {
 538                         char final_filename[PATH_MAX];
 539                         snprintf(final_filename, sizeof final_filename,
 540                                 "%s/%s.%04lx.%04x",
 541                                 ctdl_netin_dir,
 542                                 CC->net_node,
 543                                 (long)getpid(),
 544                                 ++seq
 545                         );
 546
 547                         if (link(CC->upl_path, final_filename) == 0) {
 548                                 unlink(CC->upl_path);
 549                         }
 550                         else {
 551                                 syslog(LOG_ALERT, "Cannot link %s to %s: %s\n",
 552                                         CC->upl_path, final_filename, strerror(errno)
 553                                 );
 554                         }
 555
 556                         /* FIXME ... here we need to trigger a network run */
 557                 }
 558
 559                 CC->upload_type = UPL_FILE;
 560                 return;
 561         }
 562
 563         if (!strcasecmp(cmd, "1")) {
 564                 cprintf("%d File '%s' saved.\n", CIT_OK, CC->upl_path);
 565                 fp = fopen(CC->upl_filedir, "a");
 566                 if (fp == NULL) {
 567                         fp = fopen(CC->upl_filedir, "w");
 568                 }
 569                 if (fp != NULL) {
 570                         fprintf(fp, "%s %s %s\n", CC->upl_file,
 571                                 CC->upl_mimetype,
 572                                 CC->upl_comment);
 573                         fclose(fp);
 574                 }
 575
 576                 /* put together an upload notice */
 577                 snprintf(upload_notice, sizeof upload_notice,
 578                         "NEW UPLOAD: '%s'\n %s\n%s\n",
 579                          CC->upl_file,
 580                          CC->upl_comment,
 581                          CC->upl_mimetype);
 582                 quickie_message(CC->curr_user, NULL, NULL, CC->room.QRname,
 583                                 upload_notice, 0, NULL);
 584         } else {
 585                 abort_upl(CC);
 586                 cprintf("%d File '%s' aborted.\n", CIT_OK, CC->upl_path);
 587         }
 588 }
 589
 590
 591 /*
 592  * read from the download file
 593  */
 594 void cmd_read(char *cmdbuf)
 595 {
 596         long start_pos;
 597         size_t bytes;
 598         char buf[SIZ];
 599         int rc;
 600
 601         /* The client will transmit its requested offset and byte count */
 602         start_pos = extract_long(cmdbuf, 0);
 603         bytes = extract_int(cmdbuf, 1);
 604         if ((start_pos < 0) || (bytes <= 0)) {
 605                 cprintf("%d you have to specify a value > 0.\n", ERROR + ILLEGAL_VALUE);
 606                 return;
 607         }
 608
 609         if (CC->download_fp == NULL) {
 610                 cprintf("%d You don't have a download file open.\n",
 611                         ERROR + RESOURCE_NOT_OPEN);
 612                 return;
 613         }
 614
 615         /* If necessary, reduce the byte count to the size of our buffer */
 616         if (bytes > sizeof(buf)) {
 617                 bytes = sizeof(buf);
 618         }
 619
 620         rc = fseek(CC->download_fp, start_pos, 0);
 621         if (rc < 0) {
 622                 cprintf("%d your file is smaller then %ld.\n", ERROR + ILLEGAL_VALUE, start_pos);
 623                 syslog(LOG_ALERT, "your file %s is smaller then %ld. [%s]\n",
 624                        CC->upl_path,
 625                        start_pos,
 626                        strerror(errno));
 627
 628                 return;
 629         }
 630         bytes = fread(buf, 1, bytes, CC->download_fp);
 631         if (bytes > 0) {
 632                 /* Tell the client the actual byte count and transmit it */
 633                 cprintf("%d %d\n", BINARY_FOLLOWS, (int)bytes);
 634                 client_write(buf, bytes);
 635         }
 636         else {
 637                 cprintf("%d %s\n", ERROR, strerror(errno));
 638         }
 639 }
 640
 641
 642 /*
 643  * write to the upload file
 644  */
 645 void cmd_writ(char *cmdbuf)
 646 {
 647         int bytes;
 648         char *buf;
 649         int rv;
 650
 651         unbuffer_output();
 652
 653         bytes = extract_int(cmdbuf, 0);
 654
 655         if (CC->upload_fp == NULL) {
 656                 cprintf("%d You don't have an upload file open.\n", ERROR + RESOURCE_NOT_OPEN);
 657                 return;
 658         }
 659         if (bytes <= 0) {
 660                 cprintf("%d you have to specify a value > 0.\n", ERROR + ILLEGAL_VALUE);
 661                 return;
 662         }
 663
 664         if (bytes > 100000) {
 665                 bytes = 100000;
 666         }
 667
 668         cprintf("%d %d\n", SEND_BINARY, bytes);
 669         buf = malloc(bytes + 1);
 670         client_read(buf, bytes);
 671         rv = fwrite(buf, bytes, 1, CC->upload_fp);
 672         if (rv == -1) {
 673                 syslog(LOG_EMERG, "Couldn't write: %s\n",
 674                        strerror(errno));
 675         }
 676         free(buf);
 677 }
 678
 679
 680
 681
 682 /*
 683  * cmd_ndop() - open a network spool file for downloading
 684  */
 685 void cmd_ndop(char *cmdbuf)
 686 {
 687         char pathname[256];
 688         struct stat statbuf;
 689
 690         if (IsEmptyStr(CC->net_node)) {
 691                 cprintf("%d Not authenticated as a network node.\n",
 692                         ERROR + NOT_LOGGED_IN);
 693                 return;
 694         }
 695
 696         if (CC->download_fp != NULL) {
 697                 cprintf("%d You already have a download file open.\n",
 698                         ERROR + RESOURCE_BUSY);
 699                 return;
 700         }
 701
 702         snprintf(pathname, sizeof pathname,
 703                          "%s/%s",
 704                          ctdl_netout_dir,
 705                          CC->net_node);
 706
 707         /* first open the file in append mode in order to create a
 708          * zero-length file if it doesn't already exist
 709          */
 710         CC->download_fp = fopen(pathname, "a");
 711         if (CC->download_fp != NULL)
 712                 fclose(CC->download_fp);
 713
 714         /* now open it */
 715         CC->download_fp = fopen(pathname, "r");
 716         if (CC->download_fp == NULL) {
 717                 cprintf("%d cannot open %s: %s\n",
 718                         ERROR + INTERNAL_ERROR, pathname, strerror(errno));
 719                 return;
 720         }
 721
 722
 723         /* set this flag so other routines know that the download file
 724          * currently open is a network spool file
 725          */
 726         CC->dl_is_net = 1;
 727
 728         stat(pathname, &statbuf);
 729         CC->download_fp_total = statbuf.st_size;
 730         cprintf("%d %ld\n", CIT_OK, (long)statbuf.st_size);
 731 }
 732
 733 /*
 734  * cmd_nuop() - open a network spool file for uploading
 735  */
 736 void cmd_nuop(char *cmdbuf)
 737 {
 738         static int seq = 1;
 739
 740         if (IsEmptyStr(CC->net_node)) {
 741                 cprintf("%d Not authenticated as a network node.\n",
 742                         ERROR + NOT_LOGGED_IN);
 743                 return;
 744         }
 745
 746         if (CC->upload_fp != NULL) {
 747                 cprintf("%d You already have an upload file open.\n",
 748                         ERROR + RESOURCE_BUSY);
 749                 return;
 750         }
 751
 752         snprintf(CC->upl_path, sizeof CC->upl_path,
 753                          "%s/%s.%04lx.%04x",
 754                          ctdl_nettmp_dir,
 755                          CC->net_node,
 756                          (long)getpid(),
 757                          ++seq);
 758
 759         CC->upload_fp = fopen(CC->upl_path, "r");
 760         if (CC->upload_fp != NULL) {
 761                 fclose(CC->upload_fp);
 762                 CC->upload_fp = NULL;
 763                 cprintf("%d '%s' already exists\n",
 764                         ERROR + ALREADY_EXISTS, CC->upl_path);
 765                 return;
 766         }
 767
 768         CC->upload_fp = fopen(CC->upl_path, "w");
 769         if (CC->upload_fp == NULL) {
 770                 cprintf("%d Cannot open %s: %s\n",
 771                         ERROR + INTERNAL_ERROR, CC->upl_path, strerror(errno));
 772                 return;
 773         }
 774
 775         CC->upload_type = UPL_NET;
 776         cprintf("%d Ok\n", CIT_OK);
 777 }
 778
 779
 780 /*****************************************************************************/
 781 /*                      MODULE INITIALIZATION STUFF                          */
 782 /*****************************************************************************/
 783
 784 CTDL_MODULE_INIT(file_ops)
 785 {
 786         if (!threading) {
 787
 788                 CtdlRegisterProtoHook(cmd_delf, "DELF", "Delete a file");
 789                 CtdlRegisterProtoHook(cmd_movf, "MOVF", "Move a file");
 790                 CtdlRegisterProtoHook(cmd_open, "OPEN", "Open a download file transfer");
 791                 CtdlRegisterProtoHook(cmd_clos, "CLOS", "Close a download file transfer");
 792                 CtdlRegisterProtoHook(cmd_uopn, "UOPN", "Open an upload file transfer");
 793                 CtdlRegisterProtoHook(cmd_ucls, "UCLS", "Close an upload file transfer");
 794                 CtdlRegisterProtoHook(cmd_read, "READ", "File transfer read operation");
 795                 CtdlRegisterProtoHook(cmd_writ, "WRIT", "File transfer write operation");
 796                 CtdlRegisterProtoHook(cmd_ndop, "NDOP", "Open a network spool file for download");
 797                 CtdlRegisterProtoHook(cmd_nuop, "NUOP", "Open a network spool file for upload");
 798                 CtdlRegisterProtoHook(cmd_oimg, "OIMG", "Open an image file for download");
 799                 CtdlRegisterProtoHook(cmd_uimg, "UIMG", "Upload an image file");
 800         }
 801         /* return our Subversion id for the Log */
 802         return "file_ops";
 803 }