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  * network_talking_to()  --  concurrency checker
  50  */
  51 static char *nttlist = NULL;
  52 int network_talking_to(char *nodename, int operation) {
  53
  54         char *ptr = NULL;
  55         int i;
  56         char buf[SIZ];
  57         int retval = 0;
  58
  59         begin_critical_section(S_NTTLIST);
  60
  61         switch(operation) {
  62
  63                 case NTT_ADD:
  64                         if (nttlist == NULL) nttlist = strdup("");
  65                         if (nttlist == NULL) break;
  66                         nttlist = (char *)realloc(nttlist,
  67                                 (strlen(nttlist) + strlen(nodename) + 3) );
  68                         strcat(nttlist, "|");
  69                         strcat(nttlist, nodename);
  70                         break;
  71
  72                 case NTT_REMOVE:
  73                         if (nttlist == NULL) break;
  74                         if (IsEmptyStr(nttlist)) break;
  75                         ptr = malloc(strlen(nttlist));
  76                         if (ptr == NULL) break;
  77                         strcpy(ptr, "");
  78                         for (i = 0; i < num_tokens(nttlist, '|'); ++i) {
  79                                 extract_token(buf, nttlist, i, '|', sizeof buf);
  80                                 if ( (!IsEmptyStr(buf))
  81                                      && (strcasecmp(buf, nodename)) ) {
  82                                                 strcat(ptr, buf);
  83                                                 strcat(ptr, "|");
  84                                 }
  85                         }
  86                         free(nttlist);
  87                         nttlist = ptr;
  88                         break;
  89
  90                 case NTT_CHECK:
  91                         if (nttlist == NULL) break;
  92                         if (IsEmptyStr(nttlist)) break;
  93                         for (i = 0; i < num_tokens(nttlist, '|'); ++i) {
  94                                 extract_token(buf, nttlist, i, '|', sizeof buf);
  95                                 if (!strcasecmp(buf, nodename)) ++retval;
  96                         }
  97                         break;
  98         }
  99
 100         if (nttlist != NULL) CtdlLogPrintf(CTDL_DEBUG, "nttlist=<%s>\n", nttlist);
 101         end_critical_section(S_NTTLIST);
 102         return(retval);
 103 }
 104
 105 void cleanup_nttlist(void)
 106 {
 107         begin_critical_section(S_NTTLIST);
 108         if (nttlist != NULL)
 109                 free(nttlist);
 110         nttlist = NULL;
 111         end_critical_section(S_NTTLIST);
 112 }
 113
 114
 115
 116 /*
 117  * Server command to delete a file from a room's directory
 118  */
 119 void cmd_delf(char *filename)
 120 {
 121         char pathname[64];
 122         int a;
 123
 124         if (CtdlAccessCheck(ac_room_aide))
 125                 return;
 126
 127         if ((CC->room.QRflags & QR_DIRECTORY) == 0) {
 128                 cprintf("%d No directory in this room.\n",
 129                         ERROR + NOT_HERE);
 130                 return;
 131         }
 132
 133         if (IsEmptyStr(filename)) {
 134                 cprintf("%d You must specify a file name.\n",
 135                         ERROR + FILE_NOT_FOUND);
 136                 return;
 137         }
 138         for (a = 0; !IsEmptyStr(&filename[a]); ++a) {
 139                 if ( (filename[a] == '/') || (filename[a] == '\\') ) {
 140                         filename[a] = '_';
 141                 }
 142         }
 143         snprintf(pathname, sizeof pathname,
 144                          "%s/%s/%s",
 145                          ctdl_file_dir,
 146                          CC->room.QRdirname, filename);
 147         a = unlink(pathname);
 148         if (a == 0) {
 149                 cprintf("%d File '%s' deleted.\n", CIT_OK, pathname);
 150         }
 151         else {
 152                 cprintf("%d File '%s' not found.\n",
 153                         ERROR + FILE_NOT_FOUND, pathname);
 154         }
 155 }
 156
 157
 158
 159
 160 /*
 161  * move a file from one room directory to another
 162  */
 163 void cmd_movf(char *cmdbuf)
 164 {
 165         char filename[PATH_MAX];
 166         char pathname[PATH_MAX];
 167         char newpath[PATH_MAX];
 168         char newroom[ROOMNAMELEN];
 169         char buf[PATH_MAX];
 170         int a;
 171         struct ctdlroom qrbuf;
 172         int rv = 0;
 173
 174         extract_token(filename, cmdbuf, 0, '|', sizeof filename);
 175         extract_token(newroom, cmdbuf, 1, '|', sizeof newroom);
 176
 177         if (CtdlAccessCheck(ac_room_aide)) return;
 178
 179         if ((CC->room.QRflags & QR_DIRECTORY) == 0) {
 180                 cprintf("%d No directory in this room.\n",
 181                         ERROR + NOT_HERE);
 182                 return;
 183         }
 184
 185         if (IsEmptyStr(filename)) {
 186                 cprintf("%d You must specify a file name.\n",
 187                         ERROR + FILE_NOT_FOUND);
 188                 return;
 189         }
 190
 191         for (a = 0; !IsEmptyStr(&filename[a]); ++a) {
 192                 if ( (filename[a] == '/') || (filename[a] == '\\') ) {
 193                         filename[a] = '_';
 194                 }
 195         }
 196         snprintf(pathname, sizeof pathname, "./files/%s/%s",
 197                  CC->room.QRdirname, filename);
 198         if (access(pathname, 0) != 0) {
 199                 cprintf("%d File '%s' not found.\n",
 200                         ERROR + FILE_NOT_FOUND, pathname);
 201                 return;
 202         }
 203
 204         if (CtdlGetRoom(&qrbuf, newroom) != 0) {
 205                 cprintf("%d '%s' does not exist.\n", ERROR + ROOM_NOT_FOUND, newroom);
 206                 return;
 207         }
 208         if ((qrbuf.QRflags & QR_DIRECTORY) == 0) {
 209                 cprintf("%d '%s' is not a directory room.\n",
 210                         ERROR + NOT_HERE, qrbuf.QRname);
 211                 return;
 212         }
 213         snprintf(newpath, sizeof newpath, "./files/%s/%s", qrbuf.QRdirname,
 214                  filename);
 215         if (link(pathname, newpath) != 0) {
 216                 cprintf("%d Couldn't move file: %s\n", ERROR + INTERNAL_ERROR,
 217                         strerror(errno));
 218                 return;
 219         }
 220         unlink(pathname);
 221
 222         /* this is a crude method of copying the file description */
 223         snprintf(buf, sizeof buf,
 224                  "cat ./files/%s/filedir |grep \"%s\" >>./files/%s/filedir",
 225                  CC->room.QRdirname, filename, qrbuf.QRdirname);
 226         rv = system(buf);
 227         cprintf("%d File '%s' has been moved.\n", CIT_OK, filename);
 228 }
 229
 230
 231 /*
 232  * This code is common to all commands which open a file for downloading,
 233  * regardless of whether it's a file from the directory, an image, a network
 234  * spool file, a MIME attachment, etc.
 235  * It examines the file and displays the OK result code and some information
 236  * about the file.  NOTE: this stuff is Unix dependent.
 237  */
 238 void OpenCmdResult(char *filename, const char *mime_type)
 239 {
 240         struct stat statbuf;
 241         time_t modtime;
 242         long filesize;
 243
 244         fstat(fileno(CC->download_fp), &statbuf);
 245         CC->download_fp_total = statbuf.st_size;
 246         filesize = (long) statbuf.st_size;
 247         modtime = (time_t) statbuf.st_mtime;
 248
 249         cprintf("%d %ld|%ld|%s|%s\n",
 250                 CIT_OK, filesize, (long)modtime, filename, mime_type);
 251 }
 252
 253
 254 /*
 255  * open a file for downloading
 256  */
 257 void cmd_open(char *cmdbuf)
 258 {
 259         char filename[256];
 260         char pathname[PATH_MAX];
 261         int a;
 262
 263         extract_token(filename, cmdbuf, 0, '|', sizeof filename);
 264
 265         if (CtdlAccessCheck(ac_logged_in)) return;
 266
 267         if ((CC->room.QRflags & QR_DIRECTORY) == 0) {
 268                 cprintf("%d No directory in this room.\n",
 269                         ERROR + NOT_HERE);
 270                 return;
 271         }
 272
 273         if (IsEmptyStr(filename)) {
 274                 cprintf("%d You must specify a file name.\n",
 275                         ERROR + FILE_NOT_FOUND);
 276                 return;
 277         }
 278
 279         if (CC->download_fp != NULL) {
 280                 cprintf("%d You already have a download file open.\n",
 281                         ERROR + RESOURCE_BUSY);
 282                 return;
 283         }
 284
 285         for (a = 0; !IsEmptyStr(&filename[a]); ++a) {
 286                 if ( (filename[a] == '/') || (filename[a] == '\\') ) {
 287                         filename[a] = '_';
 288                 }
 289         }
 290
 291         snprintf(pathname, sizeof pathname,
 292                          "%s/%s/%s",
 293                          ctdl_file_dir,
 294                          CC->room.QRdirname, filename);
 295         CC->download_fp = fopen(pathname, "r");
 296
 297         if (CC->download_fp == NULL) {
 298                 cprintf("%d cannot open %s: %s\n",
 299                         ERROR + INTERNAL_ERROR, pathname, strerror(errno));
 300                 return;
 301         }
 302
 303         OpenCmdResult(filename, "application/octet-stream");
 304 }
 305
 306 /*
 307  * open an image file
 308  */
 309 void cmd_oimg(char *cmdbuf)
 310 {
 311         char filename[256];
 312         char pathname[PATH_MAX];
 313         char MimeTestBuf[32];
 314         struct ctdluser usbuf;
 315         char which_user[USERNAME_SIZE];
 316         int which_floor;
 317         int a;
 318         int rv;
 319
 320         extract_token(filename, cmdbuf, 0, '|', sizeof filename);
 321
 322         if (IsEmptyStr(filename)) {
 323                 cprintf("%d You must specify a file name.\n",
 324                         ERROR + FILE_NOT_FOUND);
 325                 return;
 326         }
 327
 328         if (CC->download_fp != NULL) {
 329                 cprintf("%d You already have a download file open.\n",
 330                         ERROR + RESOURCE_BUSY);
 331                 return;
 332         }
 333
 334         if (!strcasecmp(filename, "_userpic_")) {
 335                 extract_token(which_user, cmdbuf, 1, '|', sizeof which_user);
 336                 if (CtdlGetUser(&usbuf, which_user) != 0) {
 337                         cprintf("%d No such user.\n",
 338                                 ERROR + NO_SUCH_USER);
 339                         return;
 340                 }
 341                 snprintf(pathname, sizeof pathname,
 342                                  "%s/%ld",
 343                                  ctdl_usrpic_dir,
 344                                  usbuf.usernum);
 345         } else if (!strcasecmp(filename, "_floorpic_")) {
 346                 which_floor = extract_int(cmdbuf, 1);
 347                 snprintf(pathname, sizeof pathname,
 348                                  "%s/floor.%d",
 349                                  ctdl_image_dir, which_floor);
 350         } else if (!strcasecmp(filename, "_roompic_")) {
 351                 assoc_file_name(pathname, sizeof pathname, &CC->room, ctdl_image_dir);
 352         } else {
 353                 for (a = 0; !IsEmptyStr(&filename[a]); ++a) {
 354                         filename[a] = tolower(filename[a]);
 355                         if ( (filename[a] == '/') || (filename[a] == '\\') ) {
 356                                 filename[a] = '_';
 357                         }
 358                 }
 359                 snprintf(pathname, sizeof pathname,
 360                                  "%s/%s",
 361                                  ctdl_image_dir,
 362                                  filename);
 363         }
 364
 365         CC->download_fp = fopen(pathname, "rb");
 366         if (CC->download_fp == NULL) {
 367                 strcat(pathname, ".gif");
 368                 CC->download_fp = fopen(pathname, "rb");
 369         }
 370         if (CC->download_fp == NULL) {
 371                 cprintf("%d Cannot open %s: %s\n",
 372                         ERROR + FILE_NOT_FOUND, pathname, strerror(errno));
 373                 return;
 374         }
 375         rv = fread(&MimeTestBuf[0], 1, 32, CC->download_fp);
 376         rewind (CC->download_fp);
 377         OpenCmdResult(pathname, GuessMimeType(&MimeTestBuf[0], 32));
 378 }
 379
 380 /*
 381  * open a file for uploading
 382  */
 383 void cmd_uopn(char *cmdbuf)
 384 {
 385         int a;
 386
 387         extract_token(CC->upl_file, cmdbuf, 0, '|', sizeof CC->upl_file);
 388         extract_token(CC->upl_mimetype, cmdbuf, 1, '|', sizeof CC->upl_mimetype);
 389         extract_token(CC->upl_comment, cmdbuf, 2, '|', sizeof CC->upl_comment);
 390
 391         if (CtdlAccessCheck(ac_logged_in)) return;
 392
 393         if ((CC->room.QRflags & QR_DIRECTORY) == 0) {
 394                 cprintf("%d No directory in this room.\n",
 395                         ERROR + NOT_HERE);
 396                 return;
 397         }
 398
 399         if (IsEmptyStr(CC->upl_file)) {
 400                 cprintf("%d You must specify a file name.\n",
 401                         ERROR + FILE_NOT_FOUND);
 402                 return;
 403         }
 404
 405         if (CC->upload_fp != NULL) {
 406                 cprintf("%d You already have a upload file open.\n",
 407                         ERROR + RESOURCE_BUSY);
 408                 return;
 409         }
 410
 411         for (a = 0; !IsEmptyStr(&CC->upl_file[a]); ++a) {
 412                 if ( (CC->upl_file[a] == '/') || (CC->upl_file[a] == '\\') ) {
 413                         CC->upl_file[a] = '_';
 414                 }
 415         }
 416         snprintf(CC->upl_path, sizeof CC->upl_path,
 417                          "%s/%s/%s",
 418                          ctdl_file_dir,
 419                          CC->room.QRdirname, CC->upl_file);
 420         snprintf(CC->upl_filedir, sizeof CC->upl_filedir,
 421                          "%s/%s/filedir",
 422                          ctdl_file_dir,
 423                          CC->room.QRdirname);
 424
 425         CC->upload_fp = fopen(CC->upl_path, "r");
 426         if (CC->upload_fp != NULL) {
 427                 fclose(CC->upload_fp);
 428                 CC->upload_fp = NULL;
 429                 cprintf("%d '%s' already exists\n",
 430                         ERROR + ALREADY_EXISTS, CC->upl_path);
 431                 return;
 432         }
 433
 434         CC->upload_fp = fopen(CC->upl_path, "wb");
 435         if (CC->upload_fp == NULL) {
 436                 cprintf("%d Cannot open %s: %s\n",
 437                         ERROR + INTERNAL_ERROR, CC->upl_path, strerror(errno));
 438                 return;
 439         }
 440         cprintf("%d Ok\n", CIT_OK);
 441 }
 442
 443
 444
 445 /*
 446  * open an image file for uploading
 447  */
 448 void cmd_uimg(char *cmdbuf)
 449 {
 450         int is_this_for_real;
 451         char basenm[256];
 452         int which_floor;
 453         int a;
 454
 455         if (num_parms(cmdbuf) < 2) {
 456                 cprintf("%d Usage error.\n", ERROR + ILLEGAL_VALUE);
 457                 return;
 458         }
 459
 460         is_this_for_real = extract_int(cmdbuf, 0);
 461         extract_token(CC->upl_mimetype, cmdbuf, 1, '|', sizeof CC->upl_mimetype);
 462         extract_token(basenm, cmdbuf, 2, '|', sizeof basenm);
 463         if (CC->upload_fp != NULL) {
 464                 cprintf("%d You already have an upload file open.\n",
 465                         ERROR + RESOURCE_BUSY);
 466                 return;
 467         }
 468
 469         strcpy(CC->upl_path, "");
 470
 471         for (a = 0; !IsEmptyStr(&basenm[a]); ++a) {
 472                 basenm[a] = tolower(basenm[a]);
 473                 if ( (basenm[a] == '/') || (basenm[a] == '\\') ) {
 474                         basenm[a] = '_';
 475                 }
 476         }
 477
 478         if (CC->user.axlevel >= AxAideU) {
 479                 snprintf(CC->upl_path, sizeof CC->upl_path,
 480                                  "%s/%s",
 481                                  ctdl_image_dir,
 482                                  basenm);
 483         }
 484
 485         if (!strcasecmp(basenm, "_userpic_")) {
 486                 snprintf(CC->upl_path, sizeof CC->upl_path,
 487                                  "%s/%ld.gif",
 488                                  ctdl_usrpic_dir,
 489                                  CC->user.usernum);
 490         }
 491
 492         if ((!strcasecmp(basenm, "_floorpic_"))
 493             && (CC->user.axlevel >= AxAideU)) {
 494                 which_floor = extract_int(cmdbuf, 2);
 495                 snprintf(CC->upl_path, sizeof CC->upl_path,
 496                                  "%s/floor.%d.gif",
 497                                  ctdl_image_dir,
 498                                  which_floor);
 499         }
 500
 501         if ((!strcasecmp(basenm, "_roompic_")) && (is_room_aide())) {
 502                 assoc_file_name(CC->upl_path, sizeof CC->upl_path, &CC->room, ctdl_image_dir);
 503         }
 504
 505         if (IsEmptyStr(CC->upl_path)) {
 506                 cprintf("%d Higher access required.\n",
 507                         ERROR + HIGHER_ACCESS_REQUIRED);
 508                 return;
 509         }
 510
 511         if (is_this_for_real == 0) {
 512                 cprintf("%d Ok to send image\n", CIT_OK);
 513                 return;
 514         }
 515
 516         CC->upload_fp = fopen(CC->upl_path, "wb");
 517         if (CC->upload_fp == NULL) {
 518                 cprintf("%d Cannot open %s: %s\n",
 519                         ERROR + INTERNAL_ERROR, CC->upl_path, strerror(errno));
 520                 return;
 521         }
 522         cprintf("%d Ok\n", CIT_OK);
 523         CC->upload_type = UPL_IMAGE;
 524 }
 525
 526
 527 /*
 528  * close the download file
 529  */
 530 void cmd_clos(char *cmdbuf)
 531 {
 532         char buf[256];
 533
 534         if (CC->download_fp == NULL) {
 535                 cprintf("%d You don't have a download file open.\n",
 536                         ERROR + RESOURCE_NOT_OPEN);
 537                 return;
 538         }
 539
 540         fclose(CC->download_fp);
 541         CC->download_fp = NULL;
 542
 543         if (CC->dl_is_net == 1) {
 544                 CC->dl_is_net = 0;
 545                 snprintf(buf, sizeof buf,
 546                                  "%s/%s",
 547                                  ctdl_netout_dir,
 548                                  CC->net_node);
 549                 unlink(buf);
 550         }
 551
 552         cprintf("%d Ok\n", CIT_OK);
 553 }
 554
 555
 556 /*
 557  * abort an upload
 558  */
 559 void abort_upl(CitContext *who)
 560 {
 561         if (who->upload_fp != NULL) {
 562                 fclose(who->upload_fp);
 563                 who->upload_fp = NULL;
 564                 unlink(CC->upl_path);
 565         }
 566 }
 567
 568
 569
 570 /*
 571  * close the upload file
 572  */
 573 void cmd_ucls(char *cmd)
 574 {
 575         FILE *fp;
 576         char upload_notice[512];
 577         static int seq = 0;
 578
 579         if (CC->upload_fp == NULL) {
 580                 cprintf("%d You don't have an upload file open.\n", ERROR + RESOURCE_NOT_OPEN);
 581                 return;
 582         }
 583
 584         fclose(CC->upload_fp);
 585         CC->upload_fp = NULL;
 586
 587         if ((!strcasecmp(cmd, "1")) && (CC->upload_type != UPL_FILE)) {
 588                 cprintf("%d Upload completed.\n", CIT_OK);
 589
 590                 if (CC->upload_type == UPL_NET) {
 591                         char final_filename[PATH_MAX];
 592                         snprintf(final_filename, sizeof final_filename,
 593                                 "%s/%s.%04lx.%04x",
 594                                 ctdl_netin_dir,
 595                                 CC->net_node,
 596                                 (long)getpid(),
 597                                 ++seq
 598                         );
 599
 600                         if (link(CC->upl_path, final_filename) == 0) {
 601                                 unlink(CC->upl_path);
 602                         }
 603                         else {
 604                                 CtdlLogPrintf(CTDL_ALERT, "Cannot link %s to %s: %s\n",
 605                                         CC->upl_path, final_filename, strerror(errno)
 606                                 );
 607                         }
 608
 609                         /* FIXME ... here we need to trigger a network run */
 610                 }
 611
 612                 CC->upload_type = UPL_FILE;
 613                 return;
 614         }
 615
 616         if (!strcasecmp(cmd, "1")) {
 617                 cprintf("%d File '%s' saved.\n", CIT_OK, CC->upl_path);
 618                 fp = fopen(CC->upl_filedir, "a");
 619                 if (fp == NULL) {
 620                         fp = fopen(CC->upl_filedir, "w");
 621                 }
 622                 if (fp != NULL) {
 623                         fprintf(fp, "%s %s %s\n", CC->upl_file,
 624                                 CC->upl_mimetype,
 625                                 CC->upl_comment);
 626                         fclose(fp);
 627                 }
 628
 629                 /* put together an upload notice */
 630                 snprintf(upload_notice, sizeof upload_notice,
 631                         "NEW UPLOAD: '%s'\n %s\n%s\n",
 632                          CC->upl_file,
 633                          CC->upl_comment,
 634                          CC->upl_mimetype);
 635                 quickie_message(CC->curr_user, NULL, NULL, CC->room.QRname,
 636                                 upload_notice, 0, NULL);
 637         } else {
 638                 abort_upl(CC);
 639                 cprintf("%d File '%s' aborted.\n", CIT_OK, CC->upl_path);
 640         }
 641 }
 642
 643
 644 /*
 645  * read from the download file
 646  */
 647 void cmd_read(char *cmdbuf)
 648 {
 649         long start_pos;
 650         size_t bytes;
 651         char buf[SIZ];
 652
 653         /* The client will transmit its requested offset and byte count */
 654         start_pos = extract_long(cmdbuf, 0);
 655         bytes = extract_int(cmdbuf, 1);
 656
 657         if (CC->download_fp == NULL) {
 658                 cprintf("%d You don't have a download file open.\n",
 659                         ERROR + RESOURCE_NOT_OPEN);
 660                 return;
 661         }
 662
 663         /* If necessary, reduce the byte count to the size of our buffer */
 664         if (bytes > sizeof(buf)) {
 665                 bytes = sizeof(buf);
 666         }
 667
 668         fseek(CC->download_fp, start_pos, 0);
 669         bytes = fread(buf, 1, bytes, CC->download_fp);
 670         if (bytes > 0) {
 671                 /* Tell the client the actual byte count and transmit it */
 672                 cprintf("%d %d\n", BINARY_FOLLOWS, (int)bytes);
 673                 client_write(buf, bytes);
 674         }
 675         else {
 676                 cprintf("%d %s\n", ERROR, strerror(errno));
 677         }
 678 }
 679
 680
 681 /*
 682  * write to the upload file
 683  */
 684 void cmd_writ(char *cmdbuf)
 685 {
 686         int bytes;
 687         char *buf;
 688         int rv;
 689
 690         unbuffer_output();
 691
 692         bytes = extract_int(cmdbuf, 0);
 693
 694         if (CC->upload_fp == NULL) {
 695                 cprintf("%d You don't have an upload file open.\n", ERROR + RESOURCE_NOT_OPEN);
 696                 return;
 697         }
 698
 699         if (bytes > 100000) {
 700                 cprintf("%d You may not write more than 100000 bytes.\n",
 701                         ERROR + TOO_BIG);
 702                 return;
 703         }
 704
 705         cprintf("%d %d\n", SEND_BINARY, bytes);
 706         buf = malloc(bytes + 1);
 707         client_read(buf, bytes);
 708         rv = fwrite(buf, bytes, 1, CC->upload_fp);
 709         free(buf);
 710 }
 711
 712
 713
 714
 715 /*
 716  * cmd_ndop() - open a network spool file for downloading
 717  */
 718 void cmd_ndop(char *cmdbuf)
 719 {
 720         char pathname[256];
 721         struct stat statbuf;
 722
 723         if (IsEmptyStr(CC->net_node)) {
 724                 cprintf("%d Not authenticated as a network node.\n",
 725                         ERROR + NOT_LOGGED_IN);
 726                 return;
 727         }
 728
 729         if (CC->download_fp != NULL) {
 730                 cprintf("%d You already have a download file open.\n",
 731                         ERROR + RESOURCE_BUSY);
 732                 return;
 733         }
 734
 735         snprintf(pathname, sizeof pathname,
 736                          "%s/%s",
 737                          ctdl_netout_dir,
 738                          CC->net_node);
 739
 740         /* first open the file in append mode in order to create a
 741          * zero-length file if it doesn't already exist
 742          */
 743         CC->download_fp = fopen(pathname, "a");
 744         if (CC->download_fp != NULL)
 745                 fclose(CC->download_fp);
 746
 747         /* now open it */
 748         CC->download_fp = fopen(pathname, "r");
 749         if (CC->download_fp == NULL) {
 750                 cprintf("%d cannot open %s: %s\n",
 751                         ERROR + INTERNAL_ERROR, pathname, strerror(errno));
 752                 return;
 753         }
 754
 755
 756         /* set this flag so other routines know that the download file
 757          * currently open is a network spool file
 758          */
 759         CC->dl_is_net = 1;
 760
 761         stat(pathname, &statbuf);
 762         CC->download_fp_total = statbuf.st_size;
 763         cprintf("%d %ld\n", CIT_OK, (long)statbuf.st_size);
 764 }
 765
 766 /*
 767  * cmd_nuop() - open a network spool file for uploading
 768  */
 769 void cmd_nuop(char *cmdbuf)
 770 {
 771         static int seq = 1;
 772
 773         if (IsEmptyStr(CC->net_node)) {
 774                 cprintf("%d Not authenticated as a network node.\n",
 775                         ERROR + NOT_LOGGED_IN);
 776                 return;
 777         }
 778
 779         if (CC->upload_fp != NULL) {
 780                 cprintf("%d You already have an upload file open.\n",
 781                         ERROR + RESOURCE_BUSY);
 782                 return;
 783         }
 784
 785         snprintf(CC->upl_path, sizeof CC->upl_path,
 786                          "%s/%s.%04lx.%04x",
 787                          ctdl_nettmp_dir,
 788                          CC->net_node,
 789                          (long)getpid(),
 790                          ++seq);
 791
 792         CC->upload_fp = fopen(CC->upl_path, "r");
 793         if (CC->upload_fp != NULL) {
 794                 fclose(CC->upload_fp);
 795                 CC->upload_fp = NULL;
 796                 cprintf("%d '%s' already exists\n",
 797                         ERROR + ALREADY_EXISTS, CC->upl_path);
 798                 return;
 799         }
 800
 801         CC->upload_fp = fopen(CC->upl_path, "w");
 802         if (CC->upload_fp == NULL) {
 803                 cprintf("%d Cannot open %s: %s\n",
 804                         ERROR + INTERNAL_ERROR, CC->upl_path, strerror(errno));
 805                 return;
 806         }
 807
 808         CC->upload_type = UPL_NET;
 809         cprintf("%d Ok\n", CIT_OK);
 810 }
 811
 812
 813 /*****************************************************************************/
 814 /*                      MODULE INITIALIZATION STUFF                          */
 815 /*****************************************************************************/
 816
 817 CTDL_MODULE_INIT(file_ops)
 818 {
 819         if (!threading) {
 820                 CtdlRegisterProtoHook(cmd_delf, "DELF", "Delete a file");
 821                 CtdlRegisterProtoHook(cmd_movf, "MOVF", "Move a file");
 822                 CtdlRegisterProtoHook(cmd_open, "OPEN", "Open a download file transfer");
 823                 CtdlRegisterProtoHook(cmd_clos, "CLOS", "Close a download file transfer");
 824                 CtdlRegisterProtoHook(cmd_uopn, "UOPN", "Open an upload file transfer");
 825                 CtdlRegisterProtoHook(cmd_ucls, "UCLS", "Close an upload file transfer");
 826                 CtdlRegisterProtoHook(cmd_read, "READ", "File transfer read operation");
 827                 CtdlRegisterProtoHook(cmd_writ, "WRIT", "File transfer write operation");
 828                 CtdlRegisterProtoHook(cmd_ndop, "NDOP", "Open a network spool file for download");
 829                 CtdlRegisterProtoHook(cmd_nuop, "NUOP", "Open a network spool file for upload");
 830                 CtdlRegisterProtoHook(cmd_oimg, "OIMG", "Open an image file for download");
 831                 CtdlRegisterProtoHook(cmd_uimg, "UIMG", "Upload an image file");
 832                 CtdlRegisterCleanupHook(cleanup_nttlist);
 833         }
 834         /* return our Subversion id for the Log */
 835         return "file_ops";
 836 }