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
 167         extract_token(filename, cmdbuf, 0, '|', sizeof filename);
 168         extract_token(newroom, cmdbuf, 1, '|', sizeof newroom);
 169
 170         if (CtdlAccessCheck(ac_room_aide)) return;
 171
 172         if ((CC->room.QRflags & QR_DIRECTORY) == 0) {
 173                 cprintf("%d No directory in this room.\n",
 174                         ERROR + NOT_HERE);
 175                 return;
 176         }
 177
 178         if (IsEmptyStr(filename)) {
 179                 cprintf("%d You must specify a file name.\n",
 180                         ERROR + FILE_NOT_FOUND);
 181                 return;
 182         }
 183
 184         for (a = 0; !IsEmptyStr(&filename[a]); ++a) {
 185                 if ( (filename[a] == '/') || (filename[a] == '\\') ) {
 186                         filename[a] = '_';
 187                 }
 188         }
 189         snprintf(pathname, sizeof pathname, "./files/%s/%s",
 190                  CC->room.QRdirname, filename);
 191         if (access(pathname, 0) != 0) {
 192                 cprintf("%d File '%s' not found.\n",
 193                         ERROR + FILE_NOT_FOUND, pathname);
 194                 return;
 195         }
 196
 197         if (getroom(&qrbuf, newroom) != 0) {
 198                 cprintf("%d '%s' does not exist.\n", ERROR + ROOM_NOT_FOUND, newroom);
 199                 return;
 200         }
 201         if ((qrbuf.QRflags & QR_DIRECTORY) == 0) {
 202                 cprintf("%d '%s' is not a directory room.\n",
 203                         ERROR + NOT_HERE, qrbuf.QRname);
 204                 return;
 205         }
 206         snprintf(newpath, sizeof newpath, "./files/%s/%s", qrbuf.QRdirname,
 207                  filename);
 208         if (link(pathname, newpath) != 0) {
 209                 cprintf("%d Couldn't move file: %s\n", ERROR + INTERNAL_ERROR,
 210                         strerror(errno));
 211                 return;
 212         }
 213         unlink(pathname);
 214
 215         /* this is a crude method of copying the file description */
 216         snprintf(buf, sizeof buf,
 217                  "cat ./files/%s/filedir |grep \"%s\" >>./files/%s/filedir",
 218                  CC->room.QRdirname, filename, qrbuf.QRdirname);
 219         system(buf);
 220         cprintf("%d File '%s' has been moved.\n", CIT_OK, filename);
 221 }
 222
 223
 224 /*
 225  * This code is common to all commands which open a file for downloading,
 226  * regardless of whether it's a file from the directory, an image, a network
 227  * spool file, a MIME attachment, etc.
 228  * It examines the file and displays the OK result code and some information
 229  * about the file.  NOTE: this stuff is Unix dependent.
 230  */
 231 void OpenCmdResult(char *filename, const char *mime_type)
 232 {
 233         struct stat statbuf;
 234         time_t modtime;
 235         long filesize;
 236
 237         fstat(fileno(CC->download_fp), &statbuf);
 238         filesize = (long) statbuf.st_size;
 239         modtime = (time_t) statbuf.st_mtime;
 240
 241         cprintf("%d %ld|%ld|%s|%s\n",
 242                 CIT_OK, filesize, (long)modtime, filename, mime_type);
 243 }
 244
 245
 246 /*
 247  * open a file for downloading
 248  */
 249 void cmd_open(char *cmdbuf)
 250 {
 251         char filename[256];
 252         char pathname[PATH_MAX];
 253         int a;
 254
 255         extract_token(filename, cmdbuf, 0, '|', sizeof filename);
 256
 257         if (CtdlAccessCheck(ac_logged_in)) return;
 258
 259         if ((CC->room.QRflags & QR_DIRECTORY) == 0) {
 260                 cprintf("%d No directory in this room.\n",
 261                         ERROR + NOT_HERE);
 262                 return;
 263         }
 264
 265         if (IsEmptyStr(filename)) {
 266                 cprintf("%d You must specify a file name.\n",
 267                         ERROR + FILE_NOT_FOUND);
 268                 return;
 269         }
 270
 271         if (CC->download_fp != NULL) {
 272                 cprintf("%d You already have a download file open.\n",
 273                         ERROR + RESOURCE_BUSY);
 274                 return;
 275         }
 276
 277         for (a = 0; !IsEmptyStr(&filename[a]); ++a) {
 278                 if ( (filename[a] == '/') || (filename[a] == '\\') ) {
 279                         filename[a] = '_';
 280                 }
 281         }
 282
 283         snprintf(pathname, sizeof pathname,
 284                          "%s/%s/%s",
 285                          ctdl_file_dir,
 286                          CC->room.QRdirname, filename);
 287         CC->download_fp = fopen(pathname, "r");
 288
 289         if (CC->download_fp == NULL) {
 290                 cprintf("%d cannot open %s: %s\n",
 291                         ERROR + INTERNAL_ERROR, pathname, strerror(errno));
 292                 return;
 293         }
 294
 295         OpenCmdResult(filename, "application/octet-stream");
 296 }
 297
 298 /*
 299  * open an image file
 300  */
 301 void cmd_oimg(char *cmdbuf)
 302 {
 303         char filename[256];
 304         char pathname[PATH_MAX];
 305         char MimeTestBuf[32];
 306         struct ctdluser usbuf;
 307         char which_user[USERNAME_SIZE];
 308         int which_floor;
 309         int a;
 310
 311         extract_token(filename, cmdbuf, 0, '|', sizeof filename);
 312
 313         if (IsEmptyStr(filename)) {
 314                 cprintf("%d You must specify a file name.\n",
 315                         ERROR + FILE_NOT_FOUND);
 316                 return;
 317         }
 318
 319         if (CC->download_fp != NULL) {
 320                 cprintf("%d You already have a download file open.\n",
 321                         ERROR + RESOURCE_BUSY);
 322                 return;
 323         }
 324
 325         if (!strcasecmp(filename, "_userpic_")) {
 326                 extract_token(which_user, cmdbuf, 1, '|', sizeof which_user);
 327                 if (getuser(&usbuf, which_user) != 0) {
 328                         cprintf("%d No such user.\n",
 329                                 ERROR + NO_SUCH_USER);
 330                         return;
 331                 }
 332                 snprintf(pathname, sizeof pathname,
 333                                  "%s/%ld",
 334                                  ctdl_usrpic_dir,
 335                                  usbuf.usernum);
 336         } else if (!strcasecmp(filename, "_floorpic_")) {
 337                 which_floor = extract_int(cmdbuf, 1);
 338                 snprintf(pathname, sizeof pathname,
 339                                  "%s/floor.%d",
 340                                  ctdl_image_dir, which_floor);
 341         } else if (!strcasecmp(filename, "_roompic_")) {
 342                 assoc_file_name(pathname, sizeof pathname, &CC->room, ctdl_image_dir);
 343         } else {
 344                 for (a = 0; !IsEmptyStr(&filename[a]); ++a) {
 345                         filename[a] = tolower(filename[a]);
 346                         if ( (filename[a] == '/') || (filename[a] == '\\') ) {
 347                                 filename[a] = '_';
 348                         }
 349                 }
 350                 snprintf(pathname, sizeof pathname,
 351                                  "%s/%s",
 352                                  ctdl_image_dir,
 353                                  filename);
 354         }
 355
 356         CC->download_fp = fopen(pathname, "rb");
 357         if (CC->download_fp == NULL) {
 358                 strcat(pathname, ".gif");
 359                 CC->download_fp = fopen(pathname, "rb");
 360         }
 361         if (CC->download_fp == NULL) {
 362                 cprintf("%d Cannot open %s: %s\n",
 363                         ERROR + FILE_NOT_FOUND, pathname, strerror(errno));
 364                 return;
 365         }
 366         fread(&MimeTestBuf[0], 1, 32, CC->download_fp);
 367         rewind (CC->download_fp);
 368         OpenCmdResult(pathname, GuessMimeType(&MimeTestBuf[0], 32));
 369 }
 370
 371 /*
 372  * open a file for uploading
 373  */
 374 void cmd_uopn(char *cmdbuf)
 375 {
 376         int a;
 377
 378         extract_token(CC->upl_file, cmdbuf, 0, '|', sizeof CC->upl_file);
 379         extract_token(CC->upl_mimetype, cmdbuf, 1, '|', sizeof CC->upl_mimetype);
 380         extract_token(CC->upl_comment, cmdbuf, 2, '|', sizeof CC->upl_comment);
 381
 382         if (CtdlAccessCheck(ac_logged_in)) return;
 383
 384         if ((CC->room.QRflags & QR_DIRECTORY) == 0) {
 385                 cprintf("%d No directory in this room.\n",
 386                         ERROR + NOT_HERE);
 387                 return;
 388         }
 389
 390         if (IsEmptyStr(CC->upl_file)) {
 391                 cprintf("%d You must specify a file name.\n",
 392                         ERROR + FILE_NOT_FOUND);
 393                 return;
 394         }
 395
 396         if (CC->upload_fp != NULL) {
 397                 cprintf("%d You already have a upload file open.\n",
 398                         ERROR + RESOURCE_BUSY);
 399                 return;
 400         }
 401
 402         for (a = 0; !IsEmptyStr(&CC->upl_file[a]); ++a) {
 403                 if ( (CC->upl_file[a] == '/') || (CC->upl_file[a] == '\\') ) {
 404                         CC->upl_file[a] = '_';
 405                 }
 406         }
 407         snprintf(CC->upl_path, sizeof CC->upl_path,
 408                          "%s/%s/%s",
 409                          ctdl_file_dir,
 410                          CC->room.QRdirname, CC->upl_file);
 411         snprintf(CC->upl_filedir, sizeof CC->upl_filedir,
 412                          "%s/%s/filedir",
 413                          ctdl_file_dir,
 414                          CC->room.QRdirname);
 415
 416         CC->upload_fp = fopen(CC->upl_path, "r");
 417         if (CC->upload_fp != NULL) {
 418                 fclose(CC->upload_fp);
 419                 CC->upload_fp = NULL;
 420                 cprintf("%d '%s' already exists\n",
 421                         ERROR + ALREADY_EXISTS, CC->upl_path);
 422                 return;
 423         }
 424
 425         CC->upload_fp = fopen(CC->upl_path, "wb");
 426         if (CC->upload_fp == NULL) {
 427                 cprintf("%d Cannot open %s: %s\n",
 428                         ERROR + INTERNAL_ERROR, CC->upl_path, strerror(errno));
 429                 return;
 430         }
 431         cprintf("%d Ok\n", CIT_OK);
 432 }
 433
 434
 435
 436 /*
 437  * open an image file for uploading
 438  */
 439 void cmd_uimg(char *cmdbuf)
 440 {
 441         int is_this_for_real;
 442         char basenm[256];
 443         int which_floor;
 444         int a;
 445
 446         if (num_parms(cmdbuf) < 2) {
 447                 cprintf("%d Usage error.\n", ERROR + ILLEGAL_VALUE);
 448                 return;
 449         }
 450
 451         is_this_for_real = extract_int(cmdbuf, 0);
 452         extract_token(CC->upl_mimetype, cmdbuf, 1, '|', sizeof CC->upl_mimetype);
 453         extract_token(basenm, cmdbuf, 2, '|', sizeof basenm);
 454         if (CC->upload_fp != NULL) {
 455                 cprintf("%d You already have an upload file open.\n",
 456                         ERROR + RESOURCE_BUSY);
 457                 return;
 458         }
 459
 460         strcpy(CC->upl_path, "");
 461
 462         for (a = 0; !IsEmptyStr(&basenm[a]); ++a) {
 463                 basenm[a] = tolower(basenm[a]);
 464                 if ( (basenm[a] == '/') || (basenm[a] == '\\') ) {
 465                         basenm[a] = '_';
 466                 }
 467         }
 468
 469         if (CC->user.axlevel >= 6) {
 470                 snprintf(CC->upl_path, sizeof CC->upl_path,
 471                                  "%s/%s",
 472                                  ctdl_image_dir,
 473                                  basenm);
 474         }
 475
 476         if (!strcasecmp(basenm, "_userpic_")) {
 477                 snprintf(CC->upl_path, sizeof CC->upl_path,
 478                                  "%s/%ld.gif",
 479                                  ctdl_usrpic_dir,
 480                                  CC->user.usernum);
 481         }
 482
 483         if ((!strcasecmp(basenm, "_floorpic_"))
 484             && (CC->user.axlevel >= 6)) {
 485                 which_floor = extract_int(cmdbuf, 2);
 486                 snprintf(CC->upl_path, sizeof CC->upl_path,
 487                                  "%s/floor.%d.gif",
 488                                  ctdl_image_dir,
 489                                  which_floor);
 490         }
 491
 492         if ((!strcasecmp(basenm, "_roompic_")) && (is_room_aide())) {
 493                 assoc_file_name(CC->upl_path, sizeof CC->upl_path, &CC->room, ctdl_image_dir);
 494         }
 495
 496         if (IsEmptyStr(CC->upl_path)) {
 497                 cprintf("%d Higher access required.\n",
 498                         ERROR + HIGHER_ACCESS_REQUIRED);
 499                 return;
 500         }
 501
 502         if (is_this_for_real == 0) {
 503                 cprintf("%d Ok to send image\n", CIT_OK);
 504                 return;
 505         }
 506
 507         CC->upload_fp = fopen(CC->upl_path, "wb");
 508         if (CC->upload_fp == NULL) {
 509                 cprintf("%d Cannot open %s: %s\n",
 510                         ERROR + INTERNAL_ERROR, CC->upl_path, strerror(errno));
 511                 return;
 512         }
 513         cprintf("%d Ok\n", CIT_OK);
 514         CC->upload_type = UPL_IMAGE;
 515 }
 516
 517
 518 /*
 519  * close the download file
 520  */
 521 void cmd_clos(char *cmdbuf)
 522 {
 523         char buf[256];
 524
 525         if (CC->download_fp == NULL) {
 526                 cprintf("%d You don't have a download file open.\n",
 527                         ERROR + RESOURCE_NOT_OPEN);
 528                 return;
 529         }
 530
 531         fclose(CC->download_fp);
 532         CC->download_fp = NULL;
 533
 534         if (CC->dl_is_net == 1) {
 535                 CC->dl_is_net = 0;
 536                 snprintf(buf, sizeof buf,
 537                                  "%s/%s",
 538                                  ctdl_netout_dir,
 539                                  CC->net_node);
 540                 unlink(buf);
 541         }
 542
 543         cprintf("%d Ok\n", CIT_OK);
 544 }
 545
 546
 547 /*
 548  * abort an upload
 549  */
 550 void abort_upl(struct CitContext *who)
 551 {
 552         if (who->upload_fp != NULL) {
 553                 fclose(who->upload_fp);
 554                 who->upload_fp = NULL;
 555                 unlink(CC->upl_path);
 556         }
 557 }
 558
 559
 560
 561 /*
 562  * close the upload file
 563  */
 564 void cmd_ucls(char *cmd)
 565 {
 566         FILE *fp;
 567         char upload_notice[512];
 568
 569         if (CC->upload_fp == NULL) {
 570                 cprintf("%d You don't have an upload file open.\n", ERROR + RESOURCE_NOT_OPEN);
 571                 return;
 572         }
 573
 574         fclose(CC->upload_fp);
 575         CC->upload_fp = NULL;
 576
 577         if ((!strcasecmp(cmd, "1")) && (CC->upload_type != UPL_FILE)) {
 578                 CC->upload_type = UPL_FILE;
 579                 cprintf("%d Upload completed.\n", CIT_OK);
 580
 581                 /* FIXME ... here we need to trigger a network run */
 582
 583                 return;
 584         }
 585
 586         if (!strcasecmp(cmd, "1")) {
 587                 cprintf("%d File '%s' saved.\n", CIT_OK, CC->upl_path);
 588                 fp = fopen(CC->upl_filedir, "a");
 589                 if (fp == NULL) {
 590                         fp = fopen(CC->upl_filedir, "w");
 591                 }
 592                 if (fp != NULL) {
 593                         fprintf(fp, "%s %s %s\n", CC->upl_file,
 594                                 CC->upl_mimetype,
 595                                 CC->upl_comment);
 596                         fclose(fp);
 597                 }
 598
 599                 /* put together an upload notice */
 600                 snprintf(upload_notice, sizeof upload_notice,
 601                         "NEW UPLOAD: '%s'\n %s\n%s\n",
 602                          CC->upl_file,
 603                          CC->upl_comment,
 604                          CC->upl_mimetype);
 605                 quickie_message(CC->curr_user, NULL, NULL, CC->room.QRname,
 606                                 upload_notice, 0, NULL);
 607         } else {
 608                 abort_upl(CC);
 609                 cprintf("%d File '%s' aborted.\n", CIT_OK, CC->upl_path);
 610         }
 611 }
 612
 613
 614
 615 /*
 616  * read from the download file
 617  */
 618 void cmd_read(char *cmdbuf)
 619 {
 620         long start_pos;
 621         size_t bytes;
 622         size_t actual_bytes;
 623         char *buf = NULL;
 624
 625         start_pos = extract_long(cmdbuf, 0);
 626         bytes = extract_int(cmdbuf, 1);
 627
 628         if (CC->download_fp == NULL) {
 629                 cprintf("%d You don't have a download file open.\n",
 630                         ERROR + RESOURCE_NOT_OPEN);
 631                 return;
 632         }
 633
 634         if (bytes > 100000) bytes = 100000;
 635         buf = malloc(bytes + 1);
 636
 637         fseek(CC->download_fp, start_pos, 0);
 638         actual_bytes = fread(buf, 1, bytes, CC->download_fp);
 639         cprintf("%d %d\n", BINARY_FOLLOWS, (int)actual_bytes);
 640         client_write(buf, actual_bytes);
 641         free(buf);
 642 }
 643
 644
 645
 646 /*
 647  * write to the upload file
 648  */
 649 void cmd_writ(char *cmdbuf)
 650 {
 651         int bytes;
 652         char *buf;
 653
 654         unbuffer_output();
 655
 656         bytes = extract_int(cmdbuf, 0);
 657
 658         if (CC->upload_fp == NULL) {
 659                 cprintf("%d You don't have an upload file open.\n", ERROR + RESOURCE_NOT_OPEN);
 660                 return;
 661         }
 662
 663         if (bytes > 100000) {
 664                 cprintf("%d You may not write more than 100000 bytes.\n",
 665                         ERROR + TOO_BIG);
 666                 return;
 667         }
 668
 669         cprintf("%d %d\n", SEND_BINARY, bytes);
 670         buf = malloc(bytes + 1);
 671         client_read(buf, bytes);
 672         fwrite(buf, bytes, 1, CC->upload_fp);
 673         free(buf);
 674 }
 675
 676
 677
 678
 679 /*
 680  * cmd_ndop() - open a network spool file for downloading
 681  */
 682 void cmd_ndop(char *cmdbuf)
 683 {
 684         char pathname[256];
 685         struct stat statbuf;
 686
 687         if (IsEmptyStr(CC->net_node)) {
 688                 cprintf("%d Not authenticated as a network node.\n",
 689                         ERROR + NOT_LOGGED_IN);
 690                 return;
 691         }
 692
 693         if (CC->download_fp != NULL) {
 694                 cprintf("%d You already have a download file open.\n",
 695                         ERROR + RESOURCE_BUSY);
 696                 return;
 697         }
 698
 699         snprintf(pathname, sizeof pathname,
 700                          "%s/%s",
 701                          ctdl_netout_dir,
 702                          CC->net_node);
 703
 704         /* first open the file in append mode in order to create a
 705          * zero-length file if it doesn't already exist
 706          */
 707         CC->download_fp = fopen(pathname, "a");
 708         if (CC->download_fp != NULL)
 709                 fclose(CC->download_fp);
 710
 711         /* now open it */
 712         CC->download_fp = fopen(pathname, "r");
 713         if (CC->download_fp == NULL) {
 714                 cprintf("%d cannot open %s: %s\n",
 715                         ERROR + INTERNAL_ERROR, pathname, strerror(errno));
 716                 return;
 717         }
 718
 719
 720         /* set this flag so other routines know that the download file
 721          * currently open is a network spool file
 722          */
 723         CC->dl_is_net = 1;
 724
 725         stat(pathname, &statbuf);
 726         cprintf("%d %ld\n", CIT_OK, (long)statbuf.st_size);
 727 }
 728
 729 /*
 730  * cmd_nuop() - open a network spool file for uploading
 731  */
 732 void cmd_nuop(char *cmdbuf)
 733 {
 734         static int seq = 1;
 735
 736         if (IsEmptyStr(CC->net_node)) {
 737                 cprintf("%d Not authenticated as a network node.\n",
 738                         ERROR + NOT_LOGGED_IN);
 739                 return;
 740         }
 741
 742         if (CC->upload_fp != NULL) {
 743                 cprintf("%d You already have an upload file open.\n",
 744                         ERROR + RESOURCE_BUSY);
 745                 return;
 746         }
 747
 748         snprintf(CC->upl_path, sizeof CC->upl_path,
 749                          "%s/%s.%04lx.%04x",
 750                          ctdl_netin_dir,
 751                          CC->net_node,
 752                          (long)getpid(),
 753                          ++seq);
 754
 755         CC->upload_fp = fopen(CC->upl_path, "r");
 756         if (CC->upload_fp != NULL) {
 757                 fclose(CC->upload_fp);
 758                 CC->upload_fp = NULL;
 759                 cprintf("%d '%s' already exists\n",
 760                         ERROR + ALREADY_EXISTS, CC->upl_path);
 761                 return;
 762         }
 763
 764         CC->upload_fp = fopen(CC->upl_path, "w");
 765         if (CC->upload_fp == NULL) {
 766                 cprintf("%d Cannot open %s: %s\n",
 767                         ERROR + INTERNAL_ERROR, CC->upl_path, strerror(errno));
 768                 return;
 769         }
 770
 771         CC->upload_type = UPL_NET;
 772         cprintf("%d Ok\n", CIT_OK);
 773 }
 774
 775
 776 /*****************************************************************************/
 777 /*                      MODULE INITIALIZATION STUFF                          */
 778 /*****************************************************************************/
 779
 780 CTDL_MODULE_INIT(file_ops)
 781 {
 782         CtdlRegisterProtoHook(cmd_delf, "DELF", "Autoconverted. TODO: document me.");
 783         CtdlRegisterProtoHook(cmd_movf, "MOVF", "Autoconverted. TODO: document me.");
 784         CtdlRegisterProtoHook(cmd_open, "OPEN", "Autoconverted. TODO: document me.");
 785         CtdlRegisterProtoHook(cmd_clos, "CLOS", "Autoconverted. TODO: document me.");
 786         CtdlRegisterProtoHook(cmd_uopn, "UOPN", "Autoconverted. TODO: document me.");
 787         CtdlRegisterProtoHook(cmd_ucls, "UCLS", "Autoconverted. TODO: document me.");
 788         CtdlRegisterProtoHook(cmd_read, "READ", "Autoconverted. TODO: document me.");
 789         CtdlRegisterProtoHook(cmd_writ, "WRIT", "Autoconverted. TODO: document me.");
 790         CtdlRegisterProtoHook(cmd_oimg, "OIMG", "Autoconverted. TODO: document me.");
 791         CtdlRegisterProtoHook(cmd_ndop, "NDOP", "Autoconverted. TODO: document me.");
 792         CtdlRegisterProtoHook(cmd_nuop, "NUOP", "Autoconverted. TODO: document me.");
 793         CtdlRegisterProtoHook(cmd_uimg, "UIMG", "Autoconverted. TODO: document me.");
 794         /* return our Subversion id for the Log */
 795         return "$Id$";
 796 }