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
  41 #ifndef HAVE_SNPRINTF
  42 #include "snprintf.h"
  43 #endif
  44
  45 #include "ctdl_module.h"
  46 #include "user_ops.h"
  47
  48
  49
  50 /*
  51  * Server command to delete a file from a room's directory
  52  */
  53 void cmd_delf(char *filename)
  54 {
  55         char pathname[64];
  56         int a;
  57
  58         if (CtdlAccessCheck(ac_room_aide))
  59                 return;
  60
  61         if ((CC->room.QRflags & QR_DIRECTORY) == 0) {
  62                 cprintf("%d No directory in this room.\n",
  63                         ERROR + NOT_HERE);
  64                 return;
  65         }
  66
  67         if (IsEmptyStr(filename)) {
  68                 cprintf("%d You must specify a file name.\n",
  69                         ERROR + FILE_NOT_FOUND);
  70                 return;
  71         }
  72         for (a = 0; !IsEmptyStr(&filename[a]); ++a) {
  73                 if ( (filename[a] == '/') || (filename[a] == '\\') ) {
  74                         filename[a] = '_';
  75                 }
  76         }
  77         snprintf(pathname, sizeof pathname,
  78                          "%s/%s/%s",
  79                          ctdl_file_dir,
  80                          CC->room.QRdirname, filename);
  81         a = unlink(pathname);
  82         if (a == 0) {
  83                 cprintf("%d File '%s' deleted.\n", CIT_OK, pathname);
  84         }
  85         else {
  86                 cprintf("%d File '%s' not found.\n",
  87                         ERROR + FILE_NOT_FOUND, pathname);
  88         }
  89 }
  90
  91
  92
  93
  94 /*
  95  * move a file from one room directory to another
  96  */
  97 void cmd_movf(char *cmdbuf)
  98 {
  99         char filename[PATH_MAX];
 100         char pathname[PATH_MAX];
 101         char newpath[PATH_MAX];
 102         char newroom[ROOMNAMELEN];
 103         char buf[PATH_MAX];
 104         int a;
 105         struct ctdlroom qrbuf;
 106
 107         extract_token(filename, cmdbuf, 0, '|', sizeof filename);
 108         extract_token(newroom, cmdbuf, 1, '|', sizeof newroom);
 109
 110         if (CtdlAccessCheck(ac_room_aide)) return;
 111
 112         if ((CC->room.QRflags & QR_DIRECTORY) == 0) {
 113                 cprintf("%d No directory in this room.\n",
 114                         ERROR + NOT_HERE);
 115                 return;
 116         }
 117
 118         if (IsEmptyStr(filename)) {
 119                 cprintf("%d You must specify a file name.\n",
 120                         ERROR + FILE_NOT_FOUND);
 121                 return;
 122         }
 123
 124         for (a = 0; !IsEmptyStr(&filename[a]); ++a) {
 125                 if ( (filename[a] == '/') || (filename[a] == '\\') ) {
 126                         filename[a] = '_';
 127                 }
 128         }
 129         snprintf(pathname, sizeof pathname, "./files/%s/%s",
 130                  CC->room.QRdirname, filename);
 131         if (access(pathname, 0) != 0) {
 132                 cprintf("%d File '%s' not found.\n",
 133                         ERROR + FILE_NOT_FOUND, pathname);
 134                 return;
 135         }
 136
 137         if (CtdlGetRoom(&qrbuf, newroom) != 0) {
 138                 cprintf("%d '%s' does not exist.\n", ERROR + ROOM_NOT_FOUND, newroom);
 139                 return;
 140         }
 141         if ((qrbuf.QRflags & QR_DIRECTORY) == 0) {
 142                 cprintf("%d '%s' is not a directory room.\n",
 143                         ERROR + NOT_HERE, qrbuf.QRname);
 144                 return;
 145         }
 146         snprintf(newpath, sizeof newpath, "./files/%s/%s", qrbuf.QRdirname,
 147                  filename);
 148         if (link(pathname, newpath) != 0) {
 149                 cprintf("%d Couldn't move file: %s\n", ERROR + INTERNAL_ERROR,
 150                         strerror(errno));
 151                 return;
 152         }
 153         unlink(pathname);
 154
 155         /* this is a crude method of copying the file description */
 156         snprintf(buf, sizeof buf,
 157                  "cat ./files/%s/filedir |grep \"%s\" >>./files/%s/filedir",
 158                  CC->room.QRdirname, filename, qrbuf.QRdirname);
 159         system(buf);
 160         cprintf("%d File '%s' has been moved.\n", CIT_OK, filename);
 161 }
 162
 163
 164 /*
 165  * This code is common to all commands which open a file for downloading,
 166  * regardless of whether it's a file from the directory, an image, a network
 167  * spool file, a MIME attachment, etc.
 168  * It examines the file and displays the OK result code and some information
 169  * about the file.  NOTE: this stuff is Unix dependent.
 170  */
 171 void OpenCmdResult(char *filename, const char *mime_type)
 172 {
 173         struct stat statbuf;
 174         time_t modtime;
 175         long filesize;
 176
 177         fstat(fileno(CC->download_fp), &statbuf);
 178         CC->download_fp_total = statbuf.st_size;
 179         filesize = (long) statbuf.st_size;
 180         modtime = (time_t) statbuf.st_mtime;
 181
 182         cprintf("%d %ld|%ld|%s|%s\n",
 183                 CIT_OK, filesize, (long)modtime, filename, mime_type);
 184 }
 185
 186
 187 /*
 188  * open a file for downloading
 189  */
 190 void cmd_open(char *cmdbuf)
 191 {
 192         char filename[256];
 193         char pathname[PATH_MAX];
 194         int a;
 195
 196         extract_token(filename, cmdbuf, 0, '|', sizeof filename);
 197
 198         if (CtdlAccessCheck(ac_logged_in)) return;
 199
 200         if ((CC->room.QRflags & QR_DIRECTORY) == 0) {
 201                 cprintf("%d No directory in this room.\n",
 202                         ERROR + NOT_HERE);
 203                 return;
 204         }
 205
 206         if (IsEmptyStr(filename)) {
 207                 cprintf("%d You must specify a file name.\n",
 208                         ERROR + FILE_NOT_FOUND);
 209                 return;
 210         }
 211         if (strstr(filename, "../") != NULL)
 212         {
 213                 cprintf("%d syntax error.\n",
 214                         ERROR + ILLEGAL_VALUE);
 215                 return;
 216         }
 217
 218         if (CC->download_fp != NULL) {
 219                 cprintf("%d You already have a download file open.\n",
 220                         ERROR + RESOURCE_BUSY);
 221                 return;
 222         }
 223
 224         for (a = 0; !IsEmptyStr(&filename[a]); ++a) {
 225                 if ( (filename[a] == '/') || (filename[a] == '\\') ) {
 226                         filename[a] = '_';
 227                 }
 228         }
 229
 230         snprintf(pathname, sizeof pathname,
 231                          "%s/%s/%s",
 232                          ctdl_file_dir,
 233                          CC->room.QRdirname, filename);
 234         CC->download_fp = fopen(pathname, "r");
 235
 236         if (CC->download_fp == NULL) {
 237                 cprintf("%d cannot open %s: %s\n",
 238                         ERROR + INTERNAL_ERROR, pathname, strerror(errno));
 239                 return;
 240         }
 241
 242         OpenCmdResult(filename, "application/octet-stream");
 243 }
 244
 245 /*
 246  * open an image file
 247  */
 248 void cmd_oimg(char *cmdbuf)
 249 {
 250         char filename[256];
 251         char pathname[PATH_MAX];
 252         char MimeTestBuf[32];
 253         struct ctdluser usbuf;
 254         char which_user[USERNAME_SIZE];
 255         int which_floor;
 256         int a;
 257         int rv;
 258
 259         extract_token(filename, cmdbuf, 0, '|', sizeof filename);
 260
 261         if (IsEmptyStr(filename)) {
 262                 cprintf("%d You must specify a file name.\n",
 263                         ERROR + FILE_NOT_FOUND);
 264                 return;
 265         }
 266
 267         if (CC->download_fp != NULL) {
 268                 cprintf("%d You already have a download file open.\n",
 269                         ERROR + RESOURCE_BUSY);
 270                 return;
 271         }
 272
 273         if (!strcasecmp(filename, "_userpic_")) {
 274                 extract_token(which_user, cmdbuf, 1, '|', sizeof which_user);
 275                 if (CtdlGetUser(&usbuf, which_user) != 0) {
 276                         cprintf("%d No such user.\n",
 277                                 ERROR + NO_SUCH_USER);
 278                         return;
 279                 }
 280                 snprintf(pathname, sizeof pathname,
 281                                  "%s/%ld",
 282                                  ctdl_usrpic_dir,
 283                                  usbuf.usernum);
 284         } else if (!strcasecmp(filename, "_floorpic_")) {
 285                 which_floor = extract_int(cmdbuf, 1);
 286                 snprintf(pathname, sizeof pathname,
 287                                  "%s/floor.%d",
 288                                  ctdl_image_dir, which_floor);
 289         } else if (!strcasecmp(filename, "_roompic_")) {
 290                 assoc_file_name(pathname, sizeof pathname, &CC->room, ctdl_image_dir);
 291         } else {
 292                 for (a = 0; !IsEmptyStr(&filename[a]); ++a) {
 293                         filename[a] = tolower(filename[a]);
 294                         if ( (filename[a] == '/') || (filename[a] == '\\') ) {
 295                                 filename[a] = '_';
 296                         }
 297                 }
 298                 if (strstr(filename, "../") != NULL)
 299                 {
 300                         cprintf("%d syntax error.\n",
 301                                 ERROR + ILLEGAL_VALUE);
 302                         return;
 303                 }
 304
 305                 snprintf(pathname, sizeof pathname,
 306                                  "%s/%s",
 307                                  ctdl_image_dir,
 308                                  filename);
 309         }
 310
 311         CC->download_fp = fopen(pathname, "rb");
 312         if (CC->download_fp == NULL) {
 313                 strcat(pathname, ".gif");
 314                 CC->download_fp = fopen(pathname, "rb");
 315         }
 316         if (CC->download_fp == NULL) {
 317                 cprintf("%d Cannot open %s: %s\n",
 318                         ERROR + FILE_NOT_FOUND, pathname, strerror(errno));
 319                 return;
 320         }
 321         rv = fread(&MimeTestBuf[0], 1, 32, CC->download_fp);
 322         if (rv == -1) {
 323                 cprintf("%d Cannot access %s: %s\n",
 324                         ERROR + FILE_NOT_FOUND, pathname, strerror(errno));
 325                 return;
 326         }
 327
 328         rewind (CC->download_fp);
 329         OpenCmdResult(pathname, GuessMimeType(&MimeTestBuf[0], 32));
 330 }
 331
 332 /*
 333  * open a file for uploading
 334  */
 335 void cmd_uopn(char *cmdbuf)
 336 {
 337         int a;
 338
 339         extract_token(CC->upl_file, cmdbuf, 0, '|', sizeof CC->upl_file);
 340         extract_token(CC->upl_mimetype, cmdbuf, 1, '|', sizeof CC->upl_mimetype);
 341         extract_token(CC->upl_comment, cmdbuf, 2, '|', sizeof CC->upl_comment);
 342
 343         if (CtdlAccessCheck(ac_logged_in)) return;
 344
 345         if ((CC->room.QRflags & QR_DIRECTORY) == 0) {
 346                 cprintf("%d No directory in this room.\n",
 347                         ERROR + NOT_HERE);
 348                 return;
 349         }
 350
 351         if (IsEmptyStr(CC->upl_file)) {
 352                 cprintf("%d You must specify a file name.\n",
 353                         ERROR + FILE_NOT_FOUND);
 354                 return;
 355         }
 356
 357         if (CC->upload_fp != NULL) {
 358                 cprintf("%d You already have a upload file open.\n",
 359                         ERROR + RESOURCE_BUSY);
 360                 return;
 361         }
 362
 363         for (a = 0; !IsEmptyStr(&CC->upl_file[a]); ++a) {
 364                 if ( (CC->upl_file[a] == '/') || (CC->upl_file[a] == '\\') ) {
 365                         CC->upl_file[a] = '_';
 366                 }
 367         }
 368         snprintf(CC->upl_path, sizeof CC->upl_path,
 369                          "%s/%s/%s",
 370                          ctdl_file_dir,
 371                          CC->room.QRdirname, CC->upl_file);
 372         snprintf(CC->upl_filedir, sizeof CC->upl_filedir,
 373                          "%s/%s/filedir",
 374                          ctdl_file_dir,
 375                          CC->room.QRdirname);
 376
 377         CC->upload_fp = fopen(CC->upl_path, "r");
 378         if (CC->upload_fp != NULL) {
 379                 fclose(CC->upload_fp);
 380                 CC->upload_fp = NULL;
 381                 cprintf("%d '%s' already exists\n",
 382                         ERROR + ALREADY_EXISTS, CC->upl_path);
 383                 return;
 384         }
 385
 386         CC->upload_fp = fopen(CC->upl_path, "wb");
 387         if (CC->upload_fp == NULL) {
 388                 cprintf("%d Cannot open %s: %s\n",
 389                         ERROR + INTERNAL_ERROR, CC->upl_path, strerror(errno));
 390                 return;
 391         }
 392         cprintf("%d Ok\n", CIT_OK);
 393 }
 394
 395
 396
 397 /*
 398  * open an image file for uploading
 399  */
 400 void cmd_uimg(char *cmdbuf)
 401 {
 402         int is_this_for_real;
 403         char basenm[256];
 404         int which_floor;
 405         int a;
 406
 407         if (num_parms(cmdbuf) < 2) {
 408                 cprintf("%d Usage error.\n", ERROR + ILLEGAL_VALUE);
 409                 return;
 410         }
 411
 412         is_this_for_real = extract_int(cmdbuf, 0);
 413         extract_token(CC->upl_mimetype, cmdbuf, 1, '|', sizeof CC->upl_mimetype);
 414         extract_token(basenm, cmdbuf, 2, '|', sizeof basenm);
 415         if (CC->upload_fp != NULL) {
 416                 cprintf("%d You already have an upload file open.\n",
 417                         ERROR + RESOURCE_BUSY);
 418                 return;
 419         }
 420
 421         strcpy(CC->upl_path, "");
 422
 423         for (a = 0; !IsEmptyStr(&basenm[a]); ++a) {
 424                 basenm[a] = tolower(basenm[a]);
 425                 if ( (basenm[a] == '/') || (basenm[a] == '\\') ) {
 426                         basenm[a] = '_';
 427                 }
 428         }
 429
 430         if (CC->user.axlevel >= AxAideU) {
 431                 snprintf(CC->upl_path, sizeof CC->upl_path,
 432                                  "%s/%s",
 433                                  ctdl_image_dir,
 434                                  basenm);
 435         }
 436
 437         if (!strcasecmp(basenm, "_userpic_")) {
 438                 snprintf(CC->upl_path, sizeof CC->upl_path,
 439                                  "%s/%ld.gif",
 440                                  ctdl_usrpic_dir,
 441                                  CC->user.usernum);
 442         }
 443
 444         if ((!strcasecmp(basenm, "_floorpic_"))
 445             && (CC->user.axlevel >= AxAideU)) {
 446                 which_floor = extract_int(cmdbuf, 2);
 447                 snprintf(CC->upl_path, sizeof CC->upl_path,
 448                                  "%s/floor.%d.gif",
 449                                  ctdl_image_dir,
 450                                  which_floor);
 451         }
 452
 453         if ((!strcasecmp(basenm, "_roompic_")) && (is_room_aide())) {
 454                 assoc_file_name(CC->upl_path, sizeof CC->upl_path, &CC->room, ctdl_image_dir);
 455         }
 456
 457         if (IsEmptyStr(CC->upl_path)) {
 458                 cprintf("%d Higher access required.\n",
 459                         ERROR + HIGHER_ACCESS_REQUIRED);
 460                 return;
 461         }
 462
 463         if (is_this_for_real == 0) {
 464                 cprintf("%d Ok to send image\n", CIT_OK);
 465                 return;
 466         }
 467
 468         CC->upload_fp = fopen(CC->upl_path, "wb");
 469         if (CC->upload_fp == NULL) {
 470                 cprintf("%d Cannot open %s: %s\n",
 471                         ERROR + INTERNAL_ERROR, CC->upl_path, strerror(errno));
 472                 return;
 473         }
 474         cprintf("%d Ok\n", CIT_OK);
 475         CC->upload_type = UPL_IMAGE;
 476 }
 477
 478
 479 /*
 480  * close the download file
 481  */
 482 void cmd_clos(char *cmdbuf)
 483 {
 484         char buf[256];
 485
 486         if (CC->download_fp == NULL) {
 487                 cprintf("%d You don't have a download file open.\n",
 488                         ERROR + RESOURCE_NOT_OPEN);
 489                 return;
 490         }
 491
 492         fclose(CC->download_fp);
 493         CC->download_fp = NULL;
 494
 495         if (CC->dl_is_net == 1) {
 496                 CC->dl_is_net = 0;
 497                 snprintf(buf, sizeof buf,
 498                                  "%s/%s",
 499                                  ctdl_netout_dir,
 500                                  CC->net_node);
 501                 unlink(buf);
 502         }
 503
 504         cprintf("%d Ok\n", CIT_OK);
 505 }
 506
 507
 508 /*
 509  * abort an upload
 510  */
 511 void abort_upl(CitContext *who)
 512 {
 513         if (who->upload_fp != NULL) {
 514                 fclose(who->upload_fp);
 515                 who->upload_fp = NULL;
 516                 unlink(CC->upl_path);
 517         }
 518 }
 519
 520
 521
 522 /*
 523  * close the upload file
 524  */
 525 void cmd_ucls(char *cmd)
 526 {
 527         FILE *fp;
 528         char upload_notice[512];
 529         static int seq = 0;
 530
 531         if (CC->upload_fp == NULL) {
 532                 cprintf("%d You don't have an upload file open.\n", ERROR + RESOURCE_NOT_OPEN);
 533                 return;
 534         }
 535
 536         fclose(CC->upload_fp);
 537         CC->upload_fp = NULL;
 538
 539         if ((!strcasecmp(cmd, "1")) && (CC->upload_type != UPL_FILE)) {
 540                 cprintf("%d Upload completed.\n", CIT_OK);
 541
 542                 if (CC->upload_type == UPL_NET) {
 543                         char final_filename[PATH_MAX];
 544                         snprintf(final_filename, sizeof final_filename,
 545                                 "%s/%s.%04lx.%04x",
 546                                 ctdl_netin_dir,
 547                                 CC->net_node,
 548                                 (long)getpid(),
 549                                 ++seq
 550                         );
 551
 552                         if (link(CC->upl_path, final_filename) == 0) {
 553                                 unlink(CC->upl_path);
 554                         }
 555                         else {
 556                                 syslog(LOG_ALERT, "Cannot link %s to %s: %s\n",
 557                                         CC->upl_path, final_filename, strerror(errno)
 558                                 );
 559                         }
 560
 561                         /* FIXME ... here we need to trigger a network run */
 562                 }
 563
 564                 CC->upload_type = UPL_FILE;
 565                 return;
 566         }
 567
 568         if (!strcasecmp(cmd, "1")) {
 569                 cprintf("%d File '%s' saved.\n", CIT_OK, CC->upl_path);
 570                 fp = fopen(CC->upl_filedir, "a");
 571                 if (fp == NULL) {
 572                         fp = fopen(CC->upl_filedir, "w");
 573                 }
 574                 if (fp != NULL) {
 575                         fprintf(fp, "%s %s %s\n", CC->upl_file,
 576                                 CC->upl_mimetype,
 577                                 CC->upl_comment);
 578                         fclose(fp);
 579                 }
 580
 581                 /* put together an upload notice */
 582                 snprintf(upload_notice, sizeof upload_notice,
 583                         "NEW UPLOAD: '%s'\n %s\n%s\n",
 584                          CC->upl_file,
 585                          CC->upl_comment,
 586                          CC->upl_mimetype);
 587                 quickie_message(CC->curr_user, NULL, NULL, CC->room.QRname,
 588                                 upload_notice, 0, NULL);
 589         } else {
 590                 abort_upl(CC);
 591                 cprintf("%d File '%s' aborted.\n", CIT_OK, CC->upl_path);
 592         }
 593 }
 594
 595
 596 /*
 597  * read from the download file
 598  */
 599 void cmd_read(char *cmdbuf)
 600 {
 601         long start_pos;
 602         size_t bytes;
 603         char buf[SIZ];
 604         int rc;
 605
 606         /* The client will transmit its requested offset and byte count */
 607         start_pos = extract_long(cmdbuf, 0);
 608         bytes = extract_int(cmdbuf, 1);
 609         if ((start_pos < 0) || (bytes <= 0)) {
 610                 cprintf("%d you have to specify a value > 0.\n", ERROR + ILLEGAL_VALUE);
 611                 return;
 612         }
 613
 614         if (CC->download_fp == NULL) {
 615                 cprintf("%d You don't have a download file open.\n",
 616                         ERROR + RESOURCE_NOT_OPEN);
 617                 return;
 618         }
 619
 620         /* If necessary, reduce the byte count to the size of our buffer */
 621         if (bytes > sizeof(buf)) {
 622                 bytes = sizeof(buf);
 623         }
 624
 625         rc = fseek(CC->download_fp, start_pos, 0);
 626         if (rc < 0) {
 627                 cprintf("%d your file is smaller then %ld.\n", ERROR + ILLEGAL_VALUE, start_pos);
 628                 syslog(LOG_ALERT, "your file %s is smaller then %ld. [%s]\n",
 629                        CC->upl_path,
 630                        start_pos,
 631                        strerror(errno));
 632
 633                 return;
 634         }
 635         bytes = fread(buf, 1, bytes, CC->download_fp);
 636         if (bytes > 0) {
 637                 /* Tell the client the actual byte count and transmit it */
 638                 cprintf("%d %d\n", BINARY_FOLLOWS, (int)bytes);
 639                 client_write(buf, bytes);
 640         }
 641         else {
 642                 cprintf("%d %s\n", ERROR, strerror(errno));
 643         }
 644 }
 645
 646
 647 /*
 648  * write to the upload file
 649  */
 650 void cmd_writ(char *cmdbuf)
 651 {
 652         int bytes;
 653         char *buf;
 654         int rv;
 655
 656         unbuffer_output();
 657
 658         bytes = extract_int(cmdbuf, 0);
 659
 660         if (CC->upload_fp == NULL) {
 661                 cprintf("%d You don't have an upload file open.\n", ERROR + RESOURCE_NOT_OPEN);
 662                 return;
 663         }
 664         if (bytes <= 0) {
 665                 cprintf("%d you have to specify a value > 0.\n", ERROR + ILLEGAL_VALUE);
 666                 return;
 667         }
 668
 669         if (bytes > 100000) {
 670                 bytes = 100000;
 671         }
 672
 673         cprintf("%d %d\n", SEND_BINARY, bytes);
 674         buf = malloc(bytes + 1);
 675         client_read(buf, bytes);
 676         rv = fwrite(buf, bytes, 1, CC->upload_fp);
 677         if (rv == -1) {
 678                 syslog(LOG_EMERG, "Couldn't write: %s\n",
 679                        strerror(errno));
 680         }
 681         free(buf);
 682 }
 683
 684
 685
 686
 687 /*
 688  * cmd_ndop() - open a network spool file for downloading
 689  */
 690 void cmd_ndop(char *cmdbuf)
 691 {
 692         char pathname[256];
 693         struct stat statbuf;
 694
 695         if (IsEmptyStr(CC->net_node)) {
 696                 cprintf("%d Not authenticated as a network node.\n",
 697                         ERROR + NOT_LOGGED_IN);
 698                 return;
 699         }
 700
 701         if (CC->download_fp != NULL) {
 702                 cprintf("%d You already have a download file open.\n",
 703                         ERROR + RESOURCE_BUSY);
 704                 return;
 705         }
 706
 707         snprintf(pathname, sizeof pathname,
 708                          "%s/%s",
 709                          ctdl_netout_dir,
 710                          CC->net_node);
 711
 712         /* first open the file in append mode in order to create a
 713          * zero-length file if it doesn't already exist
 714          */
 715         CC->download_fp = fopen(pathname, "a");
 716         if (CC->download_fp != NULL)
 717                 fclose(CC->download_fp);
 718
 719         /* now open it */
 720         CC->download_fp = fopen(pathname, "r");
 721         if (CC->download_fp == NULL) {
 722                 cprintf("%d cannot open %s: %s\n",
 723                         ERROR + INTERNAL_ERROR, pathname, strerror(errno));
 724                 return;
 725         }
 726
 727
 728         /* set this flag so other routines know that the download file
 729          * currently open is a network spool file
 730          */
 731         CC->dl_is_net = 1;
 732
 733         stat(pathname, &statbuf);
 734         CC->download_fp_total = statbuf.st_size;
 735         cprintf("%d %ld\n", CIT_OK, (long)statbuf.st_size);
 736 }
 737
 738 /*
 739  * cmd_nuop() - open a network spool file for uploading
 740  */
 741 void cmd_nuop(char *cmdbuf)
 742 {
 743         static int seq = 1;
 744
 745         if (IsEmptyStr(CC->net_node)) {
 746                 cprintf("%d Not authenticated as a network node.\n",
 747                         ERROR + NOT_LOGGED_IN);
 748                 return;
 749         }
 750
 751         if (CC->upload_fp != NULL) {
 752                 cprintf("%d You already have an upload file open.\n",
 753                         ERROR + RESOURCE_BUSY);
 754                 return;
 755         }
 756
 757         snprintf(CC->upl_path, sizeof CC->upl_path,
 758                          "%s/%s.%04lx.%04x",
 759                          ctdl_nettmp_dir,
 760                          CC->net_node,
 761                          (long)getpid(),
 762                          ++seq);
 763
 764         CC->upload_fp = fopen(CC->upl_path, "r");
 765         if (CC->upload_fp != NULL) {
 766                 fclose(CC->upload_fp);
 767                 CC->upload_fp = NULL;
 768                 cprintf("%d '%s' already exists\n",
 769                         ERROR + ALREADY_EXISTS, CC->upl_path);
 770                 return;
 771         }
 772
 773         CC->upload_fp = fopen(CC->upl_path, "w");
 774         if (CC->upload_fp == NULL) {
 775                 cprintf("%d Cannot open %s: %s\n",
 776                         ERROR + INTERNAL_ERROR, CC->upl_path, strerror(errno));
 777                 return;
 778         }
 779
 780         CC->upload_type = UPL_NET;
 781         cprintf("%d Ok\n", CIT_OK);
 782 }
 783
 784
 785 /*****************************************************************************/
 786 /*                      MODULE INITIALIZATION STUFF                          */
 787 /*****************************************************************************/
 788
 789 CTDL_MODULE_INIT(file_ops)
 790 {
 791         if (!threading) {
 792
 793                 CtdlRegisterProtoHook(cmd_delf, "DELF", "Delete a file");
 794                 CtdlRegisterProtoHook(cmd_movf, "MOVF", "Move a file");
 795                 CtdlRegisterProtoHook(cmd_open, "OPEN", "Open a download file transfer");
 796                 CtdlRegisterProtoHook(cmd_clos, "CLOS", "Close a download file transfer");
 797                 CtdlRegisterProtoHook(cmd_uopn, "UOPN", "Open an upload file transfer");
 798                 CtdlRegisterProtoHook(cmd_ucls, "UCLS", "Close an upload file transfer");
 799                 CtdlRegisterProtoHook(cmd_read, "READ", "File transfer read operation");
 800                 CtdlRegisterProtoHook(cmd_writ, "WRIT", "File transfer write operation");
 801                 CtdlRegisterProtoHook(cmd_ndop, "NDOP", "Open a network spool file for download");
 802                 CtdlRegisterProtoHook(cmd_nuop, "NUOP", "Open a network spool file for upload");
 803                 CtdlRegisterProtoHook(cmd_oimg, "OIMG", "Open an image file for download");
 804                 CtdlRegisterProtoHook(cmd_uimg, "UIMG", "Upload an image file");
 805         }
 806         /* return our Subversion id for the Log */
 807         return "file_ops";
 808 }