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