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