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