citadel/file_ops.c

   1 /*
   2  * Server functions which handle file transfers and room directories.
   3  */
   4
   5 #include "sysdep.h"
   6 #include <stdlib.h>
   7 #include <unistd.h>
   8 #include <stdio.h>
   9 #include <fcntl.h>
  10 #include <sys/stat.h>
  11 #include <errno.h>
  12 #include <ctype.h>
  13 #include <string.h>
  14 #include <sys/stat.h>
  15 #include <sys/mman.h>
  16
  17 #if TIME_WITH_SYS_TIME
  18 # include <sys/time.h>
  19 # include <time.h>
  20 #else
  21 # if HAVE_SYS_TIME_H
  22 #  include <sys/time.h>
  23 # else
  24 #  include <time.h>
  25 # endif
  26 #endif
  27
  28 #include <limits.h>
  29 #include <libcitadel.h>
  30 #include "citadel.h"
  31 #include "server.h"
  32 #include "config.h"
  33 #include "file_ops.h"
  34 #include "sysdep_decls.h"
  35 #include "support.h"
  36 #include "room_ops.h"
  37 #include "msgbase.h"
  38 #include "citserver.h"
  39 #include "threads.h"
  40
  41 #ifndef HAVE_SNPRINTF
  42 #include "snprintf.h"
  43 #endif
  44
  45 #include "ctdl_module.h"
  46 #include "user_ops.h"
  47
  48
  49
  50 /*
  51  * Server command to delete a file from a room's directory
  52  */
  53 void cmd_delf(char *filename)
  54 {
  55         char pathname[64];
  56         int a;
  57
  58         if (CtdlAccessCheck(ac_room_aide))
  59                 return;
  60
  61         if ((CC->room.QRflags & QR_DIRECTORY) == 0) {
  62                 cprintf("%d No directory in this room.\n",
  63                         ERROR + NOT_HERE);
  64                 return;
  65         }
  66
  67         if (IsEmptyStr(filename)) {
  68                 cprintf("%d You must specify a file name.\n",
  69                         ERROR + FILE_NOT_FOUND);
  70                 return;
  71         }
  72         for (a = 0; !IsEmptyStr(&filename[a]); ++a) {
  73                 if ( (filename[a] == '/') || (filename[a] == '\\') ) {
  74                         filename[a] = '_';
  75                 }
  76         }
  77         snprintf(pathname, sizeof pathname,
  78                          "%s/%s/%s",
  79                          ctdl_file_dir,
  80                          CC->room.QRdirname, filename);
  81         a = unlink(pathname);
  82         if (a == 0) {
  83                 cprintf("%d File '%s' deleted.\n", CIT_OK, pathname);
  84         }
  85         else {
  86                 cprintf("%d File '%s' not found.\n",
  87                         ERROR + FILE_NOT_FOUND, pathname);
  88         }
  89 }
  90
  91
  92
  93
  94 /*
  95  * move a file from one room directory to another
  96  */
  97 void cmd_movf(char *cmdbuf)
  98 {
  99         char filename[PATH_MAX];
 100         char pathname[PATH_MAX];
 101         char newpath[PATH_MAX];
 102         char newroom[ROOMNAMELEN];
 103         char buf[PATH_MAX];
 104         int a;
 105         struct ctdlroom qrbuf;
 106
 107         extract_token(filename, cmdbuf, 0, '|', sizeof filename);
 108         extract_token(newroom, cmdbuf, 1, '|', sizeof newroom);
 109
 110         if (CtdlAccessCheck(ac_room_aide)) return;
 111
 112         if ((CC->room.QRflags & QR_DIRECTORY) == 0) {
 113                 cprintf("%d No directory in this room.\n",
 114                         ERROR + NOT_HERE);
 115                 return;
 116         }
 117
 118         if (IsEmptyStr(filename)) {
 119                 cprintf("%d You must specify a file name.\n",
 120                         ERROR + FILE_NOT_FOUND);
 121                 return;
 122         }
 123
 124         for (a = 0; !IsEmptyStr(&filename[a]); ++a) {
 125                 if ( (filename[a] == '/') || (filename[a] == '\\') ) {
 126                         filename[a] = '_';
 127                 }
 128         }
 129         snprintf(pathname, sizeof pathname, "./files/%s/%s",
 130                  CC->room.QRdirname, filename);
 131         if (access(pathname, 0) != 0) {
 132                 cprintf("%d File '%s' not found.\n",
 133                         ERROR + FILE_NOT_FOUND, pathname);
 134                 return;
 135         }
 136
 137         if (CtdlGetRoom(&qrbuf, newroom) != 0) {
 138                 cprintf("%d '%s' does not exist.\n", ERROR + ROOM_NOT_FOUND, newroom);
 139                 return;
 140         }
 141         if ((qrbuf.QRflags & QR_DIRECTORY) == 0) {
 142                 cprintf("%d '%s' is not a directory room.\n",
 143                         ERROR + NOT_HERE, qrbuf.QRname);
 144                 return;
 145         }
 146         snprintf(newpath, sizeof newpath, "./files/%s/%s", qrbuf.QRdirname,
 147                  filename);
 148         if (link(pathname, newpath) != 0) {
 149                 cprintf("%d Couldn't move file: %s\n", ERROR + INTERNAL_ERROR,
 150                         strerror(errno));
 151                 return;
 152         }
 153         unlink(pathname);
 154
 155         /* this is a crude method of copying the file description */
 156         snprintf(buf, sizeof buf,
 157                  "cat ./files/%s/filedir |grep \"%s\" >>./files/%s/filedir",
 158                  CC->room.QRdirname, filename, qrbuf.QRdirname);
 159         system(buf);
 160         cprintf("%d File '%s' has been moved.\n", CIT_OK, filename);
 161 }
 162
 163
 164 /*
 165  * This code is common to all commands which open a file for downloading,
 166  * regardless of whether it's a file from the directory, an image, a network
 167  * spool file, a MIME attachment, etc.
 168  * It examines the file and displays the OK result code and some information
 169  * about the file.  NOTE: this stuff is Unix dependent.
 170  */
 171 void OpenCmdResult(char *filename, const char *mime_type)
 172 {
 173         struct stat statbuf;
 174         time_t modtime;
 175         long filesize;
 176
 177         fstat(fileno(CC->download_fp), &statbuf);
 178         CC->download_fp_total = statbuf.st_size;
 179         filesize = (long) statbuf.st_size;
 180         modtime = (time_t) statbuf.st_mtime;
 181
 182         cprintf("%d %ld|%ld|%s|%s\n",
 183                 CIT_OK, filesize, (long)modtime, filename, mime_type);
 184 }
 185
 186
 187 /*
 188  * open a file for downloading
 189  */
 190 void cmd_open(char *cmdbuf)
 191 {
 192         char filename[256];
 193         char pathname[PATH_MAX];
 194         int a;
 195
 196         extract_token(filename, cmdbuf, 0, '|', sizeof filename);
 197
 198         if (CtdlAccessCheck(ac_logged_in)) return;
 199
 200         if ((CC->room.QRflags & QR_DIRECTORY) == 0) {
 201                 cprintf("%d No directory in this room.\n",
 202                         ERROR + NOT_HERE);
 203                 return;
 204         }
 205
 206         if (IsEmptyStr(filename)) {
 207                 cprintf("%d You must specify a file name.\n",
 208                         ERROR + FILE_NOT_FOUND);
 209                 return;
 210         }
 211
 212         if (CC->download_fp != NULL) {
 213                 cprintf("%d You already have a download file open.\n",
 214                         ERROR + RESOURCE_BUSY);
 215                 return;
 216         }
 217
 218         for (a = 0; !IsEmptyStr(&filename[a]); ++a) {
 219                 if ( (filename[a] == '/') || (filename[a] == '\\') ) {
 220                         filename[a] = '_';
 221                 }
 222         }
 223
 224         snprintf(pathname, sizeof pathname,
 225                          "%s/%s/%s",
 226                          ctdl_file_dir,
 227                          CC->room.QRdirname, filename);
 228         CC->download_fp = fopen(pathname, "r");
 229
 230         if (CC->download_fp == NULL) {
 231                 cprintf("%d cannot open %s: %s\n",
 232                         ERROR + INTERNAL_ERROR, pathname, strerror(errno));
 233                 return;
 234         }
 235
 236         OpenCmdResult(filename, "application/octet-stream");
 237 }
 238
 239 /*
 240  * open an image file
 241  */
 242 void cmd_oimg(char *cmdbuf)
 243 {
 244         char filename[256];
 245         char pathname[PATH_MAX];
 246         char MimeTestBuf[32];
 247         struct ctdluser usbuf;
 248         char which_user[USERNAME_SIZE];
 249         int which_floor;
 250         int a;
 251         int rv;
 252
 253         extract_token(filename, cmdbuf, 0, '|', sizeof filename);
 254
 255         if (IsEmptyStr(filename)) {
 256                 cprintf("%d You must specify a file name.\n",
 257                         ERROR + FILE_NOT_FOUND);
 258                 return;
 259         }
 260
 261         if (CC->download_fp != NULL) {
 262                 cprintf("%d You already have a download file open.\n",
 263                         ERROR + RESOURCE_BUSY);
 264                 return;
 265         }
 266
 267         if (!strcasecmp(filename, "_userpic_")) {
 268                 extract_token(which_user, cmdbuf, 1, '|', sizeof which_user);
 269                 if (CtdlGetUser(&usbuf, which_user) != 0) {
 270                         cprintf("%d No such user.\n",
 271                                 ERROR + NO_SUCH_USER);
 272                         return;
 273                 }
 274                 snprintf(pathname, sizeof pathname,
 275                                  "%s/%ld",
 276                                  ctdl_usrpic_dir,
 277                                  usbuf.usernum);
 278         } else if (!strcasecmp(filename, "_floorpic_")) {
 279                 which_floor = extract_int(cmdbuf, 1);
 280                 snprintf(pathname, sizeof pathname,
 281                                  "%s/floor.%d",
 282                                  ctdl_image_dir, which_floor);
 283         } else if (!strcasecmp(filename, "_roompic_")) {
 284                 assoc_file_name(pathname, sizeof pathname, &CC->room, ctdl_image_dir);
 285         } else {
 286                 for (a = 0; !IsEmptyStr(&filename[a]); ++a) {
 287                         filename[a] = tolower(filename[a]);
 288                         if ( (filename[a] == '/') || (filename[a] == '\\') ) {
 289                                 filename[a] = '_';
 290                         }
 291                 }
 292                 snprintf(pathname, sizeof pathname,
 293                                  "%s/%s",
 294                                  ctdl_image_dir,
 295                                  filename);
 296         }
 297
 298         CC->download_fp = fopen(pathname, "rb");
 299         if (CC->download_fp == NULL) {
 300                 strcat(pathname, ".gif");
 301                 CC->download_fp = fopen(pathname, "rb");
 302         }
 303         if (CC->download_fp == NULL) {
 304                 cprintf("%d Cannot open %s: %s\n",
 305                         ERROR + FILE_NOT_FOUND, pathname, strerror(errno));
 306                 return;
 307         }
 308         rv = fread(&MimeTestBuf[0], 1, 32, CC->download_fp);
 309         if (rv == -1) {
 310                 cprintf("%d Cannot access %s: %s\n",
 311                         ERROR + FILE_NOT_FOUND, pathname, strerror(errno));
 312                 return;
 313         }
 314
 315         rewind (CC->download_fp);
 316         OpenCmdResult(pathname, GuessMimeType(&MimeTestBuf[0], 32));
 317 }
 318
 319 /*
 320  * open a file for uploading
 321  */
 322 void cmd_uopn(char *cmdbuf)
 323 {
 324         int a;
 325
 326         extract_token(CC->upl_file, cmdbuf, 0, '|', sizeof CC->upl_file);
 327         extract_token(CC->upl_mimetype, cmdbuf, 1, '|', sizeof CC->upl_mimetype);
 328         extract_token(CC->upl_comment, cmdbuf, 2, '|', sizeof CC->upl_comment);
 329
 330         if (CtdlAccessCheck(ac_logged_in)) return;
 331
 332         if ((CC->room.QRflags & QR_DIRECTORY) == 0) {
 333                 cprintf("%d No directory in this room.\n",
 334                         ERROR + NOT_HERE);
 335                 return;
 336         }
 337
 338         if (IsEmptyStr(CC->upl_file)) {
 339                 cprintf("%d You must specify a file name.\n",
 340                         ERROR + FILE_NOT_FOUND);
 341                 return;
 342         }
 343
 344         if (CC->upload_fp != NULL) {
 345                 cprintf("%d You already have a upload file open.\n",
 346                         ERROR + RESOURCE_BUSY);
 347                 return;
 348         }
 349
 350         for (a = 0; !IsEmptyStr(&CC->upl_file[a]); ++a) {
 351                 if ( (CC->upl_file[a] == '/') || (CC->upl_file[a] == '\\') ) {
 352                         CC->upl_file[a] = '_';
 353                 }
 354         }
 355         snprintf(CC->upl_path, sizeof CC->upl_path,
 356                          "%s/%s/%s",
 357                          ctdl_file_dir,
 358                          CC->room.QRdirname, CC->upl_file);
 359         snprintf(CC->upl_filedir, sizeof CC->upl_filedir,
 360                          "%s/%s/filedir",
 361                          ctdl_file_dir,
 362                          CC->room.QRdirname);
 363
 364         CC->upload_fp = fopen(CC->upl_path, "r");
 365         if (CC->upload_fp != NULL) {
 366                 fclose(CC->upload_fp);
 367                 CC->upload_fp = NULL;
 368                 cprintf("%d '%s' already exists\n",
 369                         ERROR + ALREADY_EXISTS, CC->upl_path);
 370                 return;
 371         }
 372
 373         CC->upload_fp = fopen(CC->upl_path, "wb");
 374         if (CC->upload_fp == NULL) {
 375                 cprintf("%d Cannot open %s: %s\n",
 376                         ERROR + INTERNAL_ERROR, CC->upl_path, strerror(errno));
 377                 return;
 378         }
 379         cprintf("%d Ok\n", CIT_OK);
 380 }
 381
 382
 383
 384 /*
 385  * open an image file for uploading
 386  */
 387 void cmd_uimg(char *cmdbuf)
 388 {
 389         int is_this_for_real;
 390         char basenm[256];
 391         int which_floor;
 392         int a;
 393
 394         if (num_parms(cmdbuf) < 2) {
 395                 cprintf("%d Usage error.\n", ERROR + ILLEGAL_VALUE);
 396                 return;
 397         }
 398
 399         is_this_for_real = extract_int(cmdbuf, 0);
 400         extract_token(CC->upl_mimetype, cmdbuf, 1, '|', sizeof CC->upl_mimetype);
 401         extract_token(basenm, cmdbuf, 2, '|', sizeof basenm);
 402         if (CC->upload_fp != NULL) {
 403                 cprintf("%d You already have an upload file open.\n",
 404                         ERROR + RESOURCE_BUSY);
 405                 return;
 406         }
 407
 408         strcpy(CC->upl_path, "");
 409
 410         for (a = 0; !IsEmptyStr(&basenm[a]); ++a) {
 411                 basenm[a] = tolower(basenm[a]);
 412                 if ( (basenm[a] == '/') || (basenm[a] == '\\') ) {
 413                         basenm[a] = '_';
 414                 }
 415         }
 416
 417         if (CC->user.axlevel >= AxAideU) {
 418                 snprintf(CC->upl_path, sizeof CC->upl_path,
 419                                  "%s/%s",
 420                                  ctdl_image_dir,
 421                                  basenm);
 422         }
 423
 424         if (!strcasecmp(basenm, "_userpic_")) {
 425                 snprintf(CC->upl_path, sizeof CC->upl_path,
 426                                  "%s/%ld.gif",
 427                                  ctdl_usrpic_dir,
 428                                  CC->user.usernum);
 429         }
 430
 431         if ((!strcasecmp(basenm, "_floorpic_"))
 432             && (CC->user.axlevel >= AxAideU)) {
 433                 which_floor = extract_int(cmdbuf, 2);
 434                 snprintf(CC->upl_path, sizeof CC->upl_path,
 435                                  "%s/floor.%d.gif",
 436                                  ctdl_image_dir,
 437                                  which_floor);
 438         }
 439
 440         if ((!strcasecmp(basenm, "_roompic_")) && (is_room_aide())) {
 441                 assoc_file_name(CC->upl_path, sizeof CC->upl_path, &CC->room, ctdl_image_dir);
 442         }
 443
 444         if (IsEmptyStr(CC->upl_path)) {
 445                 cprintf("%d Higher access required.\n",
 446                         ERROR + HIGHER_ACCESS_REQUIRED);
 447                 return;
 448         }
 449
 450         if (is_this_for_real == 0) {
 451                 cprintf("%d Ok to send image\n", CIT_OK);
 452                 return;
 453         }
 454
 455         CC->upload_fp = fopen(CC->upl_path, "wb");
 456         if (CC->upload_fp == NULL) {
 457                 cprintf("%d Cannot open %s: %s\n",
 458                         ERROR + INTERNAL_ERROR, CC->upl_path, strerror(errno));
 459                 return;
 460         }
 461         cprintf("%d Ok\n", CIT_OK);
 462         CC->upload_type = UPL_IMAGE;
 463 }
 464
 465
 466 /*
 467  * close the download file
 468  */
 469 void cmd_clos(char *cmdbuf)
 470 {
 471         char buf[256];
 472
 473         if (CC->download_fp == NULL) {
 474                 cprintf("%d You don't have a download file open.\n",
 475                         ERROR + RESOURCE_NOT_OPEN);
 476                 return;
 477         }
 478
 479         fclose(CC->download_fp);
 480         CC->download_fp = NULL;
 481
 482         if (CC->dl_is_net == 1) {
 483                 CC->dl_is_net = 0;
 484                 snprintf(buf, sizeof buf,
 485                                  "%s/%s",
 486                                  ctdl_netout_dir,
 487                                  CC->net_node);
 488                 unlink(buf);
 489         }
 490
 491         cprintf("%d Ok\n", CIT_OK);
 492 }
 493
 494
 495 /*
 496  * abort an upload
 497  */
 498 void abort_upl(CitContext *who)
 499 {
 500         if (who->upload_fp != NULL) {
 501                 fclose(who->upload_fp);
 502                 who->upload_fp = NULL;
 503                 unlink(CC->upl_path);
 504         }
 505 }
 506
 507
 508
 509 /*
 510  * close the upload file
 511  */
 512 void cmd_ucls(char *cmd)
 513 {
 514         FILE *fp;
 515         char upload_notice[512];
 516         static int seq = 0;
 517
 518         if (CC->upload_fp == NULL) {
 519                 cprintf("%d You don't have an upload file open.\n", ERROR + RESOURCE_NOT_OPEN);
 520                 return;
 521         }
 522
 523         fclose(CC->upload_fp);
 524         CC->upload_fp = NULL;
 525
 526         if ((!strcasecmp(cmd, "1")) && (CC->upload_type != UPL_FILE)) {
 527                 cprintf("%d Upload completed.\n", CIT_OK);
 528
 529                 if (CC->upload_type == UPL_NET) {
 530                         char final_filename[PATH_MAX];
 531                         snprintf(final_filename, sizeof final_filename,
 532                                 "%s/%s.%04lx.%04x",
 533                                 ctdl_netin_dir,
 534                                 CC->net_node,
 535                                 (long)getpid(),
 536                                 ++seq
 537                         );
 538
 539                         if (link(CC->upl_path, final_filename) == 0) {
 540                                 unlink(CC->upl_path);
 541                         }
 542                         else {
 543                                 syslog(LOG_ALERT, "Cannot link %s to %s: %s\n",
 544                                         CC->upl_path, final_filename, strerror(errno)
 545                                 );
 546                         }
 547
 548                         /* FIXME ... here we need to trigger a network run */
 549                 }
 550
 551                 CC->upload_type = UPL_FILE;
 552                 return;
 553         }
 554
 555         if (!strcasecmp(cmd, "1")) {
 556                 cprintf("%d File '%s' saved.\n", CIT_OK, CC->upl_path);
 557                 fp = fopen(CC->upl_filedir, "a");
 558                 if (fp == NULL) {
 559                         fp = fopen(CC->upl_filedir, "w");
 560                 }
 561                 if (fp != NULL) {
 562                         fprintf(fp, "%s %s %s\n", CC->upl_file,
 563                                 CC->upl_mimetype,
 564                                 CC->upl_comment);
 565                         fclose(fp);
 566                 }
 567
 568                 /* put together an upload notice */
 569                 snprintf(upload_notice, sizeof upload_notice,
 570                         "NEW UPLOAD: '%s'\n %s\n%s\n",
 571                          CC->upl_file,
 572                          CC->upl_comment,
 573                          CC->upl_mimetype);
 574                 quickie_message(CC->curr_user, NULL, NULL, CC->room.QRname,
 575                                 upload_notice, 0, NULL);
 576         } else {
 577                 abort_upl(CC);
 578                 cprintf("%d File '%s' aborted.\n", CIT_OK, CC->upl_path);
 579         }
 580 }
 581
 582
 583 /*
 584  * read from the download file
 585  */
 586 void cmd_read(char *cmdbuf)
 587 {
 588         long start_pos;
 589         size_t bytes;
 590         char buf[SIZ];
 591         int rc;
 592
 593         /* The client will transmit its requested offset and byte count */
 594         start_pos = extract_long(cmdbuf, 0);
 595         bytes = extract_int(cmdbuf, 1);
 596         if ((start_pos < 0) || (bytes <= 0)) {
 597                 cprintf("%d you have to specify a value > 0.\n", ERROR + ILLEGAL_VALUE);
 598                 return;
 599         }
 600
 601         if (CC->download_fp == NULL) {
 602                 cprintf("%d You don't have a download file open.\n",
 603                         ERROR + RESOURCE_NOT_OPEN);
 604                 return;
 605         }
 606
 607         /* If necessary, reduce the byte count to the size of our buffer */
 608         if (bytes > sizeof(buf)) {
 609                 bytes = sizeof(buf);
 610         }
 611
 612         rc = fseek(CC->download_fp, start_pos, 0);
 613         if (rc < 0) {
 614                 cprintf("%d your file is smaller then %ld.\n", ERROR + ILLEGAL_VALUE, start_pos);
 615                 syslog(LOG_ALERT, "your file %s is smaller then %ld. [%s]\n",
 616                        CC->upl_path,
 617                        start_pos,
 618                        strerror(errno));
 619
 620                 return;
 621         }
 622         bytes = fread(buf, 1, bytes, CC->download_fp);
 623         if (bytes > 0) {
 624                 /* Tell the client the actual byte count and transmit it */
 625                 cprintf("%d %d\n", BINARY_FOLLOWS, (int)bytes);
 626                 client_write(buf, bytes);
 627         }
 628         else {
 629                 cprintf("%d %s\n", ERROR, strerror(errno));
 630         }
 631 }
 632
 633
 634 /*
 635  * write to the upload file
 636  */
 637 void cmd_writ(char *cmdbuf)
 638 {
 639         int bytes;
 640         char *buf;
 641         int rv;
 642
 643         unbuffer_output();
 644
 645         bytes = extract_int(cmdbuf, 0);
 646
 647         if (CC->upload_fp == NULL) {
 648                 cprintf("%d You don't have an upload file open.\n", ERROR + RESOURCE_NOT_OPEN);
 649                 return;
 650         }
 651         if (bytes <= 0) {
 652                 cprintf("%d you have to specify a value > 0.\n", ERROR + ILLEGAL_VALUE);
 653                 return;
 654         }
 655
 656         if (bytes > 100000) {
 657                 bytes = 100000;
 658         }
 659
 660         cprintf("%d %d\n", SEND_BINARY, bytes);
 661         buf = malloc(bytes + 1);
 662         client_read(buf, bytes);
 663         rv = fwrite(buf, bytes, 1, CC->upload_fp);
 664         if (rv == -1) {
 665                 syslog(LOG_EMERG, "Couldn't write: %s\n",
 666                        strerror(errno));
 667         }
 668         free(buf);
 669 }
 670
 671
 672
 673
 674 /*
 675  * cmd_ndop() - open a network spool file for downloading
 676  */
 677 void cmd_ndop(char *cmdbuf)
 678 {
 679         char pathname[256];
 680         struct stat statbuf;
 681
 682         if (IsEmptyStr(CC->net_node)) {
 683                 cprintf("%d Not authenticated as a network node.\n",
 684                         ERROR + NOT_LOGGED_IN);
 685                 return;
 686         }
 687
 688         if (CC->download_fp != NULL) {
 689                 cprintf("%d You already have a download file open.\n",
 690                         ERROR + RESOURCE_BUSY);
 691                 return;
 692         }
 693
 694         snprintf(pathname, sizeof pathname,
 695                          "%s/%s",
 696                          ctdl_netout_dir,
 697                          CC->net_node);
 698
 699         /* first open the file in append mode in order to create a
 700          * zero-length file if it doesn't already exist
 701          */
 702         CC->download_fp = fopen(pathname, "a");
 703         if (CC->download_fp != NULL)
 704                 fclose(CC->download_fp);
 705
 706         /* now open it */
 707         CC->download_fp = fopen(pathname, "r");
 708         if (CC->download_fp == NULL) {
 709                 cprintf("%d cannot open %s: %s\n",
 710                         ERROR + INTERNAL_ERROR, pathname, strerror(errno));
 711                 return;
 712         }
 713
 714
 715         /* set this flag so other routines know that the download file
 716          * currently open is a network spool file
 717          */
 718         CC->dl_is_net = 1;
 719
 720         stat(pathname, &statbuf);
 721         CC->download_fp_total = statbuf.st_size;
 722         cprintf("%d %ld\n", CIT_OK, (long)statbuf.st_size);
 723 }
 724
 725 /*
 726  * cmd_nuop() - open a network spool file for uploading
 727  */
 728 void cmd_nuop(char *cmdbuf)
 729 {
 730         static int seq = 1;
 731
 732         if (IsEmptyStr(CC->net_node)) {
 733                 cprintf("%d Not authenticated as a network node.\n",
 734                         ERROR + NOT_LOGGED_IN);
 735                 return;
 736         }
 737
 738         if (CC->upload_fp != NULL) {
 739                 cprintf("%d You already have an upload file open.\n",
 740                         ERROR + RESOURCE_BUSY);
 741                 return;
 742         }
 743
 744         snprintf(CC->upl_path, sizeof CC->upl_path,
 745                          "%s/%s.%04lx.%04x",
 746                          ctdl_nettmp_dir,
 747                          CC->net_node,
 748                          (long)getpid(),
 749                          ++seq);
 750
 751         CC->upload_fp = fopen(CC->upl_path, "r");
 752         if (CC->upload_fp != NULL) {
 753                 fclose(CC->upload_fp);
 754                 CC->upload_fp = NULL;
 755                 cprintf("%d '%s' already exists\n",
 756                         ERROR + ALREADY_EXISTS, CC->upl_path);
 757                 return;
 758         }
 759
 760         CC->upload_fp = fopen(CC->upl_path, "w");
 761         if (CC->upload_fp == NULL) {
 762                 cprintf("%d Cannot open %s: %s\n",
 763                         ERROR + INTERNAL_ERROR, CC->upl_path, strerror(errno));
 764                 return;
 765         }
 766
 767         CC->upload_type = UPL_NET;
 768         cprintf("%d Ok\n", CIT_OK);
 769 }
 770
 771
 772 /*****************************************************************************/
 773 /*                      MODULE INITIALIZATION STUFF                          */
 774 /*****************************************************************************/
 775
 776 CTDL_MODULE_INIT(file_ops)
 777 {
 778         if (!threading) {
 779
 780                 CtdlRegisterProtoHook(cmd_delf, "DELF", "Delete a file");
 781                 CtdlRegisterProtoHook(cmd_movf, "MOVF", "Move a file");
 782                 CtdlRegisterProtoHook(cmd_open, "OPEN", "Open a download file transfer");
 783                 CtdlRegisterProtoHook(cmd_clos, "CLOS", "Close a download file transfer");
 784                 CtdlRegisterProtoHook(cmd_uopn, "UOPN", "Open an upload file transfer");
 785                 CtdlRegisterProtoHook(cmd_ucls, "UCLS", "Close an upload file transfer");
 786                 CtdlRegisterProtoHook(cmd_read, "READ", "File transfer read operation");
 787                 CtdlRegisterProtoHook(cmd_writ, "WRIT", "File transfer write operation");
 788                 CtdlRegisterProtoHook(cmd_ndop, "NDOP", "Open a network spool file for download");
 789                 CtdlRegisterProtoHook(cmd_nuop, "NUOP", "Open a network spool file for upload");
 790                 CtdlRegisterProtoHook(cmd_oimg, "OIMG", "Open an image file for download");
 791                 CtdlRegisterProtoHook(cmd_uimg, "UIMG", "Upload an image file");
 792         }
 793         /* return our Subversion id for the Log */
 794         return "file_ops";
 795 }