citadel/file_ops.c

   1 /*
   2  * $Id$
   3  *
   4  * Server functions which handle file transfers and room directories.
   5  *
   6  */
   7
   8 #include "sysdep.h"
   9 #include <stdlib.h>
  10 #include <unistd.h>
  11 #include <stdio.h>
  12 #include <fcntl.h>
  13 #include <sys/stat.h>
  14 #include <errno.h>
  15 #include <ctype.h>
  16 #include <string.h>
  17 #include <sys/stat.h>
  18
  19 #if TIME_WITH_SYS_TIME
  20 # include <sys/time.h>
  21 # include <time.h>
  22 #else
  23 # if HAVE_SYS_TIME_H
  24 #  include <sys/time.h>
  25 # else
  26 #  include <time.h>
  27 # endif
  28 #endif
  29
  30 #include <limits.h>
  31 #include <libcitadel.h>
  32 #include "citadel.h"
  33 #include "server.h"
  34 #include "config.h"
  35 #include "file_ops.h"
  36 #include "sysdep_decls.h"
  37 #include "user_ops.h"
  38 #include "support.h"
  39 #include "room_ops.h"
  40 #include "msgbase.h"
  41 #include "citserver.h"
  42 #include "threads.h"
  43
  44 #ifndef HAVE_SNPRINTF
  45 #include "snprintf.h"
  46 #endif
  47
  48 #include "ctdl_module.h"
  49
  50 /*
  51  * network_talking_to()  --  concurrency checker
  52  */
  53 int network_talking_to(char *nodename, int operation) {
  54
  55         static char *nttlist = NULL;
  56         char *ptr = NULL;
  57         int i;
  58         char buf[SIZ];
  59         int retval = 0;
  60
  61         begin_critical_section(S_NTTLIST);
  62
  63         switch(operation) {
  64
  65                 case NTT_ADD:
  66                         if (nttlist == NULL) nttlist = strdup("");
  67                         if (nttlist == NULL) break;
  68                         nttlist = (char *)realloc(nttlist,
  69                                 (strlen(nttlist) + strlen(nodename) + 3) );
  70                         strcat(nttlist, "|");
  71                         strcat(nttlist, nodename);
  72                         break;
  73
  74                 case NTT_REMOVE:
  75                         if (nttlist == NULL) break;
  76                         if (IsEmptyStr(nttlist)) break;
  77                         ptr = malloc(strlen(nttlist));
  78                         if (ptr == NULL) break;
  79                         strcpy(ptr, "");
  80                         for (i = 0; i < num_tokens(nttlist, '|'); ++i) {
  81                                 extract_token(buf, nttlist, i, '|', sizeof buf);
  82                                 if ( (!IsEmptyStr(buf))
  83                                      && (strcasecmp(buf, nodename)) ) {
  84                                                 strcat(ptr, buf);
  85                                                 strcat(ptr, "|");
  86                                 }
  87                         }
  88                         free(nttlist);
  89                         nttlist = ptr;
  90                         break;
  91
  92                 case NTT_CHECK:
  93                         if (nttlist == NULL) break;
  94                         if (IsEmptyStr(nttlist)) break;
  95                         for (i = 0; i < num_tokens(nttlist, '|'); ++i) {
  96                                 extract_token(buf, nttlist, i, '|', sizeof buf);
  97                                 if (!strcasecmp(buf, nodename)) ++retval;
  98                         }
  99                         break;
 100         }
 101
 102         if (nttlist != NULL) CtdlLogPrintf(CTDL_DEBUG, "nttlist=<%s>\n", nttlist);
 103         end_critical_section(S_NTTLIST);
 104         return(retval);
 105 }
 106
 107
 108
 109
 110 /*
 111  * Server command to delete a file from a room's directory
 112  */
 113 void cmd_delf(char *filename)
 114 {
 115         char pathname[64];
 116         int a;
 117
 118         if (CtdlAccessCheck(ac_room_aide))
 119                 return;
 120
 121         if ((CC->room.QRflags & QR_DIRECTORY) == 0) {
 122                 cprintf("%d No directory in this room.\n",
 123                         ERROR + NOT_HERE);
 124                 return;
 125         }
 126
 127         if (IsEmptyStr(filename)) {
 128                 cprintf("%d You must specify a file name.\n",
 129                         ERROR + FILE_NOT_FOUND);
 130                 return;
 131         }
 132         for (a = 0; !IsEmptyStr(&filename[a]); ++a) {
 133                 if ( (filename[a] == '/') || (filename[a] == '\\') ) {
 134                         filename[a] = '_';
 135                 }
 136         }
 137         snprintf(pathname, sizeof pathname,
 138                          "%s/%s/%s",
 139                          ctdl_file_dir,
 140                          CC->room.QRdirname, filename);
 141         a = unlink(pathname);
 142         if (a == 0) {
 143                 cprintf("%d File '%s' deleted.\n", CIT_OK, pathname);
 144         }
 145         else {
 146                 cprintf("%d File '%s' not found.\n",
 147                         ERROR + FILE_NOT_FOUND, pathname);
 148         }
 149 }
 150
 151
 152
 153
 154 /*
 155  * move a file from one room directory to another
 156  */
 157 void cmd_movf(char *cmdbuf)
 158 {
 159         char filename[PATH_MAX];
 160         char pathname[PATH_MAX];
 161         char newpath[PATH_MAX];
 162         char newroom[ROOMNAMELEN];
 163         char buf[PATH_MAX];
 164         int a;
 165         struct ctdlroom qrbuf;
 166         int rv = 0;
 167
 168         extract_token(filename, cmdbuf, 0, '|', sizeof filename);
 169         extract_token(newroom, cmdbuf, 1, '|', sizeof newroom);
 170
 171         if (CtdlAccessCheck(ac_room_aide)) return;
 172
 173         if ((CC->room.QRflags & QR_DIRECTORY) == 0) {
 174                 cprintf("%d No directory in this room.\n",
 175                         ERROR + NOT_HERE);
 176                 return;
 177         }
 178
 179         if (IsEmptyStr(filename)) {
 180                 cprintf("%d You must specify a file name.\n",
 181                         ERROR + FILE_NOT_FOUND);
 182                 return;
 183         }
 184
 185         for (a = 0; !IsEmptyStr(&filename[a]); ++a) {
 186                 if ( (filename[a] == '/') || (filename[a] == '\\') ) {
 187                         filename[a] = '_';
 188                 }
 189         }
 190         snprintf(pathname, sizeof pathname, "./files/%s/%s",
 191                  CC->room.QRdirname, filename);
 192         if (access(pathname, 0) != 0) {
 193                 cprintf("%d File '%s' not found.\n",
 194                         ERROR + FILE_NOT_FOUND, pathname);
 195                 return;
 196         }
 197
 198         if (CtdlGetRoom(&qrbuf, newroom) != 0) {
 199                 cprintf("%d '%s' does not exist.\n", ERROR + ROOM_NOT_FOUND, newroom);
 200                 return;
 201         }
 202         if ((qrbuf.QRflags & QR_DIRECTORY) == 0) {
 203                 cprintf("%d '%s' is not a directory room.\n",
 204                         ERROR + NOT_HERE, qrbuf.QRname);
 205                 return;
 206         }
 207         snprintf(newpath, sizeof newpath, "./files/%s/%s", qrbuf.QRdirname,
 208                  filename);
 209         if (link(pathname, newpath) != 0) {
 210                 cprintf("%d Couldn't move file: %s\n", ERROR + INTERNAL_ERROR,
 211                         strerror(errno));
 212                 return;
 213         }
 214         unlink(pathname);
 215
 216         /* this is a crude method of copying the file description */
 217         snprintf(buf, sizeof buf,
 218                  "cat ./files/%s/filedir |grep \"%s\" >>./files/%s/filedir",
 219                  CC->room.QRdirname, filename, qrbuf.QRdirname);
 220         rv = system(buf);
 221         cprintf("%d File '%s' has been moved.\n", CIT_OK, filename);
 222 }
 223
 224
 225 /*
 226  * This code is common to all commands which open a file for downloading,
 227  * regardless of whether it's a file from the directory, an image, a network
 228  * spool file, a MIME attachment, etc.
 229  * It examines the file and displays the OK result code and some information
 230  * about the file.  NOTE: this stuff is Unix dependent.
 231  */
 232 void OpenCmdResult(char *filename, const char *mime_type)
 233 {
 234         struct stat statbuf;
 235         time_t modtime;
 236         long filesize;
 237
 238         fstat(fileno(CC->download_fp), &statbuf);
 239         filesize = (long) statbuf.st_size;
 240         modtime = (time_t) statbuf.st_mtime;
 241
 242         cprintf("%d %ld|%ld|%s|%s\n",
 243                 CIT_OK, filesize, (long)modtime, filename, mime_type);
 244 }
 245
 246
 247 /*
 248  * open a file for downloading
 249  */
 250 void cmd_open(char *cmdbuf)
 251 {
 252         char filename[256];
 253         char pathname[PATH_MAX];
 254         int a;
 255
 256         extract_token(filename, cmdbuf, 0, '|', sizeof filename);
 257
 258         if (CtdlAccessCheck(ac_logged_in)) return;
 259
 260         if ((CC->room.QRflags & QR_DIRECTORY) == 0) {
 261                 cprintf("%d No directory in this room.\n",
 262                         ERROR + NOT_HERE);
 263                 return;
 264         }
 265
 266         if (IsEmptyStr(filename)) {
 267                 cprintf("%d You must specify a file name.\n",
 268                         ERROR + FILE_NOT_FOUND);
 269                 return;
 270         }
 271
 272         if (CC->download_fp != NULL) {
 273                 cprintf("%d You already have a download file open.\n",
 274                         ERROR + RESOURCE_BUSY);
 275                 return;
 276         }
 277
 278         for (a = 0; !IsEmptyStr(&filename[a]); ++a) {
 279                 if ( (filename[a] == '/') || (filename[a] == '\\') ) {
 280                         filename[a] = '_';
 281                 }
 282         }
 283
 284         snprintf(pathname, sizeof pathname,
 285                          "%s/%s/%s",
 286                          ctdl_file_dir,
 287                          CC->room.QRdirname, filename);
 288         CC->download_fp = fopen(pathname, "r");
 289
 290         if (CC->download_fp == NULL) {
 291                 cprintf("%d cannot open %s: %s\n",
 292                         ERROR + INTERNAL_ERROR, pathname, strerror(errno));
 293                 return;
 294         }
 295
 296         OpenCmdResult(filename, "application/octet-stream");
 297 }
 298
 299 /*
 300  * open an image file
 301  */
 302 void cmd_oimg(char *cmdbuf)
 303 {
 304         char filename[256];
 305         char pathname[PATH_MAX];
 306         char MimeTestBuf[32];
 307         struct ctdluser usbuf;
 308         char which_user[USERNAME_SIZE];
 309         int which_floor;
 310         int a;
 311         int rv;
 312
 313         extract_token(filename, cmdbuf, 0, '|', sizeof filename);
 314
 315         if (IsEmptyStr(filename)) {
 316                 cprintf("%d You must specify a file name.\n",
 317                         ERROR + FILE_NOT_FOUND);
 318                 return;
 319         }
 320
 321         if (CC->download_fp != NULL) {
 322                 cprintf("%d You already have a download file open.\n",
 323                         ERROR + RESOURCE_BUSY);
 324                 return;
 325         }
 326
 327         if (!strcasecmp(filename, "_userpic_")) {
 328                 extract_token(which_user, cmdbuf, 1, '|', sizeof which_user);
 329                 if (CtdlGetUser(&usbuf, which_user) != 0) {
 330                         cprintf("%d No such user.\n",
 331                                 ERROR + NO_SUCH_USER);
 332                         return;
 333                 }
 334                 snprintf(pathname, sizeof pathname,
 335                                  "%s/%ld",
 336                                  ctdl_usrpic_dir,
 337                                  usbuf.usernum);
 338         } else if (!strcasecmp(filename, "_floorpic_")) {
 339                 which_floor = extract_int(cmdbuf, 1);
 340                 snprintf(pathname, sizeof pathname,
 341                                  "%s/floor.%d",
 342                                  ctdl_image_dir, which_floor);
 343         } else if (!strcasecmp(filename, "_roompic_")) {
 344                 assoc_file_name(pathname, sizeof pathname, &CC->room, ctdl_image_dir);
 345         } else {
 346                 for (a = 0; !IsEmptyStr(&filename[a]); ++a) {
 347                         filename[a] = tolower(filename[a]);
 348                         if ( (filename[a] == '/') || (filename[a] == '\\') ) {
 349                                 filename[a] = '_';
 350                         }
 351                 }
 352                 snprintf(pathname, sizeof pathname,
 353                                  "%s/%s",
 354                                  ctdl_image_dir,
 355                                  filename);
 356         }
 357
 358         CC->download_fp = fopen(pathname, "rb");
 359         if (CC->download_fp == NULL) {
 360                 strcat(pathname, ".gif");
 361                 CC->download_fp = fopen(pathname, "rb");
 362         }
 363         if (CC->download_fp == NULL) {
 364                 cprintf("%d Cannot open %s: %s\n",
 365                         ERROR + FILE_NOT_FOUND, pathname, strerror(errno));
 366                 return;
 367         }
 368         rv = fread(&MimeTestBuf[0], 1, 32, CC->download_fp);
 369         rewind (CC->download_fp);
 370         OpenCmdResult(pathname, GuessMimeType(&MimeTestBuf[0], 32));
 371 }
 372
 373 /*
 374  * open a file for uploading
 375  */
 376 void cmd_uopn(char *cmdbuf)
 377 {
 378         int a;
 379
 380         extract_token(CC->upl_file, cmdbuf, 0, '|', sizeof CC->upl_file);
 381         extract_token(CC->upl_mimetype, cmdbuf, 1, '|', sizeof CC->upl_mimetype);
 382         extract_token(CC->upl_comment, cmdbuf, 2, '|', sizeof CC->upl_comment);
 383
 384         if (CtdlAccessCheck(ac_logged_in)) return;
 385
 386         if ((CC->room.QRflags & QR_DIRECTORY) == 0) {
 387                 cprintf("%d No directory in this room.\n",
 388                         ERROR + NOT_HERE);
 389                 return;
 390         }
 391
 392         if (IsEmptyStr(CC->upl_file)) {
 393                 cprintf("%d You must specify a file name.\n",
 394                         ERROR + FILE_NOT_FOUND);
 395                 return;
 396         }
 397
 398         if (CC->upload_fp != NULL) {
 399                 cprintf("%d You already have a upload file open.\n",
 400                         ERROR + RESOURCE_BUSY);
 401                 return;
 402         }
 403
 404         for (a = 0; !IsEmptyStr(&CC->upl_file[a]); ++a) {
 405                 if ( (CC->upl_file[a] == '/') || (CC->upl_file[a] == '\\') ) {
 406                         CC->upl_file[a] = '_';
 407                 }
 408         }
 409         snprintf(CC->upl_path, sizeof CC->upl_path,
 410                          "%s/%s/%s",
 411                          ctdl_file_dir,
 412                          CC->room.QRdirname, CC->upl_file);
 413         snprintf(CC->upl_filedir, sizeof CC->upl_filedir,
 414                          "%s/%s/filedir",
 415                          ctdl_file_dir,
 416                          CC->room.QRdirname);
 417
 418         CC->upload_fp = fopen(CC->upl_path, "r");
 419         if (CC->upload_fp != NULL) {
 420                 fclose(CC->upload_fp);
 421                 CC->upload_fp = NULL;
 422                 cprintf("%d '%s' already exists\n",
 423                         ERROR + ALREADY_EXISTS, CC->upl_path);
 424                 return;
 425         }
 426
 427         CC->upload_fp = fopen(CC->upl_path, "wb");
 428         if (CC->upload_fp == NULL) {
 429                 cprintf("%d Cannot open %s: %s\n",
 430                         ERROR + INTERNAL_ERROR, CC->upl_path, strerror(errno));
 431                 return;
 432         }
 433         cprintf("%d Ok\n", CIT_OK);
 434 }
 435
 436
 437
 438 /*
 439  * open an image file for uploading
 440  */
 441 void cmd_uimg(char *cmdbuf)
 442 {
 443         int is_this_for_real;
 444         char basenm[256];
 445         int which_floor;
 446         int a;
 447
 448         if (num_parms(cmdbuf) < 2) {
 449                 cprintf("%d Usage error.\n", ERROR + ILLEGAL_VALUE);
 450                 return;
 451         }
 452
 453         is_this_for_real = extract_int(cmdbuf, 0);
 454         extract_token(CC->upl_mimetype, cmdbuf, 1, '|', sizeof CC->upl_mimetype);
 455         extract_token(basenm, cmdbuf, 2, '|', sizeof basenm);
 456         if (CC->upload_fp != NULL) {
 457                 cprintf("%d You already have an upload file open.\n",
 458                         ERROR + RESOURCE_BUSY);
 459                 return;
 460         }
 461
 462         strcpy(CC->upl_path, "");
 463
 464         for (a = 0; !IsEmptyStr(&basenm[a]); ++a) {
 465                 basenm[a] = tolower(basenm[a]);
 466                 if ( (basenm[a] == '/') || (basenm[a] == '\\') ) {
 467                         basenm[a] = '_';
 468                 }
 469         }
 470
 471         if (CC->user.axlevel >= 6) {
 472                 snprintf(CC->upl_path, sizeof CC->upl_path,
 473                                  "%s/%s",
 474                                  ctdl_image_dir,
 475                                  basenm);
 476         }
 477
 478         if (!strcasecmp(basenm, "_userpic_")) {
 479                 snprintf(CC->upl_path, sizeof CC->upl_path,
 480                                  "%s/%ld.gif",
 481                                  ctdl_usrpic_dir,
 482                                  CC->user.usernum);
 483         }
 484
 485         if ((!strcasecmp(basenm, "_floorpic_"))
 486             && (CC->user.axlevel >= 6)) {
 487                 which_floor = extract_int(cmdbuf, 2);
 488                 snprintf(CC->upl_path, sizeof CC->upl_path,
 489                                  "%s/floor.%d.gif",
 490                                  ctdl_image_dir,
 491                                  which_floor);
 492         }
 493
 494         if ((!strcasecmp(basenm, "_roompic_")) && (is_room_aide())) {
 495                 assoc_file_name(CC->upl_path, sizeof CC->upl_path, &CC->room, ctdl_image_dir);
 496         }
 497
 498         if (IsEmptyStr(CC->upl_path)) {
 499                 cprintf("%d Higher access required.\n",
 500                         ERROR + HIGHER_ACCESS_REQUIRED);
 501                 return;
 502         }
 503
 504         if (is_this_for_real == 0) {
 505                 cprintf("%d Ok to send image\n", CIT_OK);
 506                 return;
 507         }
 508
 509         CC->upload_fp = fopen(CC->upl_path, "wb");
 510         if (CC->upload_fp == NULL) {
 511                 cprintf("%d Cannot open %s: %s\n",
 512                         ERROR + INTERNAL_ERROR, CC->upl_path, strerror(errno));
 513                 return;
 514         }
 515         cprintf("%d Ok\n", CIT_OK);
 516         CC->upload_type = UPL_IMAGE;
 517 }
 518
 519
 520 /*
 521  * close the download file
 522  */
 523 void cmd_clos(char *cmdbuf)
 524 {
 525         char buf[256];
 526
 527         if (CC->download_fp == NULL) {
 528                 cprintf("%d You don't have a download file open.\n",
 529                         ERROR + RESOURCE_NOT_OPEN);
 530                 return;
 531         }
 532
 533         fclose(CC->download_fp);
 534         CC->download_fp = NULL;
 535
 536         if (CC->dl_is_net == 1) {
 537                 CC->dl_is_net = 0;
 538                 snprintf(buf, sizeof buf,
 539                                  "%s/%s",
 540                                  ctdl_netout_dir,
 541                                  CC->net_node);
 542                 unlink(buf);
 543         }
 544
 545         cprintf("%d Ok\n", CIT_OK);
 546 }
 547
 548
 549 /*
 550  * abort an upload
 551  */
 552 void abort_upl(CitContext *who)
 553 {
 554         if (who->upload_fp != NULL) {
 555                 fclose(who->upload_fp);
 556                 who->upload_fp = NULL;
 557                 unlink(CC->upl_path);
 558         }
 559 }
 560
 561
 562
 563 /*
 564  * close the upload file
 565  */
 566 void cmd_ucls(char *cmd)
 567 {
 568         FILE *fp;
 569         char upload_notice[512];
 570
 571         if (CC->upload_fp == NULL) {
 572                 cprintf("%d You don't have an upload file open.\n", ERROR + RESOURCE_NOT_OPEN);
 573                 return;
 574         }
 575
 576         fclose(CC->upload_fp);
 577         CC->upload_fp = NULL;
 578
 579         if ((!strcasecmp(cmd, "1")) && (CC->upload_type != UPL_FILE)) {
 580                 CC->upload_type = UPL_FILE;
 581                 cprintf("%d Upload completed.\n", CIT_OK);
 582
 583                 /* FIXME ... here we need to trigger a network run */
 584
 585                 return;
 586         }
 587
 588         if (!strcasecmp(cmd, "1")) {
 589                 cprintf("%d File '%s' saved.\n", CIT_OK, CC->upl_path);
 590                 fp = fopen(CC->upl_filedir, "a");
 591                 if (fp == NULL) {
 592                         fp = fopen(CC->upl_filedir, "w");
 593                 }
 594                 if (fp != NULL) {
 595                         fprintf(fp, "%s %s %s\n", CC->upl_file,
 596                                 CC->upl_mimetype,
 597                                 CC->upl_comment);
 598                         fclose(fp);
 599                 }
 600
 601                 /* put together an upload notice */
 602                 snprintf(upload_notice, sizeof upload_notice,
 603                         "NEW UPLOAD: '%s'\n %s\n%s\n",
 604                          CC->upl_file,
 605                          CC->upl_comment,
 606                          CC->upl_mimetype);
 607                 quickie_message(CC->curr_user, NULL, NULL, CC->room.QRname,
 608                                 upload_notice, 0, NULL);
 609         } else {
 610                 abort_upl(CC);
 611                 cprintf("%d File '%s' aborted.\n", CIT_OK, CC->upl_path);
 612         }
 613 }
 614
 615
 616
 617 /*
 618  * read from the download file
 619  */
 620 void cmd_read(char *cmdbuf)
 621 {
 622         long start_pos;
 623         size_t bytes;
 624         size_t actual_bytes;
 625         char *buf = NULL;
 626
 627         start_pos = extract_long(cmdbuf, 0);
 628         bytes = extract_int(cmdbuf, 1);
 629
 630         if (CC->download_fp == NULL) {
 631                 cprintf("%d You don't have a download file open.\n",
 632                         ERROR + RESOURCE_NOT_OPEN);
 633                 return;
 634         }
 635
 636         if (bytes > 100000) bytes = 100000;
 637         buf = malloc(bytes + 1);
 638
 639         fseek(CC->download_fp, start_pos, 0);
 640
 641         actual_bytes = fread(buf, 1, bytes, CC->download_fp);
 642         if (actual_bytes > 0) {
 643                 cprintf("%d %d\n", BINARY_FOLLOWS, (int)actual_bytes);
 644                 client_write(buf, bytes);
 645         }
 646         else {
 647                 cprintf("%d %s\n", ERROR, strerror(errno));
 648         }
 649         free(buf);
 650 }
 651
 652
 653
 654 /*
 655  * write to the upload file
 656  */
 657 void cmd_writ(char *cmdbuf)
 658 {
 659         int bytes;
 660         char *buf;
 661         int rv;
 662
 663         unbuffer_output();
 664
 665         bytes = extract_int(cmdbuf, 0);
 666
 667         if (CC->upload_fp == NULL) {
 668                 cprintf("%d You don't have an upload file open.\n", ERROR + RESOURCE_NOT_OPEN);
 669                 return;
 670         }
 671
 672         if (bytes > 100000) {
 673                 cprintf("%d You may not write more than 100000 bytes.\n",
 674                         ERROR + TOO_BIG);
 675                 return;
 676         }
 677
 678         cprintf("%d %d\n", SEND_BINARY, bytes);
 679         buf = malloc(bytes + 1);
 680         client_read(buf, bytes);
 681         rv = fwrite(buf, bytes, 1, CC->upload_fp);
 682         free(buf);
 683 }
 684
 685
 686
 687
 688 /*
 689  * cmd_ndop() - open a network spool file for downloading
 690  */
 691 void cmd_ndop(char *cmdbuf)
 692 {
 693         char pathname[256];
 694         struct stat statbuf;
 695
 696         if (IsEmptyStr(CC->net_node)) {
 697                 cprintf("%d Not authenticated as a network node.\n",
 698                         ERROR + NOT_LOGGED_IN);
 699                 return;
 700         }
 701
 702         if (CC->download_fp != NULL) {
 703                 cprintf("%d You already have a download file open.\n",
 704                         ERROR + RESOURCE_BUSY);
 705                 return;
 706         }
 707
 708         snprintf(pathname, sizeof pathname,
 709                          "%s/%s",
 710                          ctdl_netout_dir,
 711                          CC->net_node);
 712
 713         /* first open the file in append mode in order to create a
 714          * zero-length file if it doesn't already exist
 715          */
 716         CC->download_fp = fopen(pathname, "a");
 717         if (CC->download_fp != NULL)
 718                 fclose(CC->download_fp);
 719
 720         /* now open it */
 721         CC->download_fp = fopen(pathname, "r");
 722         if (CC->download_fp == NULL) {
 723                 cprintf("%d cannot open %s: %s\n",
 724                         ERROR + INTERNAL_ERROR, pathname, strerror(errno));
 725                 return;
 726         }
 727
 728
 729         /* set this flag so other routines know that the download file
 730          * currently open is a network spool file
 731          */
 732         CC->dl_is_net = 1;
 733
 734         stat(pathname, &statbuf);
 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_netin_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                 CtdlRegisterProtoHook(cmd_delf, "DELF", "Autoconverted. TODO: document me.");
 793                 CtdlRegisterProtoHook(cmd_movf, "MOVF", "Autoconverted. TODO: document me.");
 794                 CtdlRegisterProtoHook(cmd_open, "OPEN", "Autoconverted. TODO: document me.");
 795                 CtdlRegisterProtoHook(cmd_clos, "CLOS", "Autoconverted. TODO: document me.");
 796                 CtdlRegisterProtoHook(cmd_uopn, "UOPN", "Autoconverted. TODO: document me.");
 797                 CtdlRegisterProtoHook(cmd_ucls, "UCLS", "Autoconverted. TODO: document me.");
 798                 CtdlRegisterProtoHook(cmd_read, "READ", "Autoconverted. TODO: document me.");
 799                 CtdlRegisterProtoHook(cmd_writ, "WRIT", "Autoconverted. TODO: document me.");
 800                 CtdlRegisterProtoHook(cmd_oimg, "OIMG", "Autoconverted. TODO: document me.");
 801                 CtdlRegisterProtoHook(cmd_ndop, "NDOP", "Autoconverted. TODO: document me.");
 802                 CtdlRegisterProtoHook(cmd_nuop, "NUOP", "Autoconverted. TODO: document me.");
 803                 CtdlRegisterProtoHook(cmd_uimg, "UIMG", "Autoconverted. TODO: document me.");
 804         }
 805         /* return our Subversion id for the Log */
 806         return "$Id$";
 807 }