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
 160         extract_token(filename, cmdbuf, 0, '|', sizeof filename);
 161         extract_token(newroom, cmdbuf, 1, '|', sizeof newroom);
 162
 163         if (CtdlAccessCheck(ac_room_aide)) return;
 164
 165         if ((CC->room.QRflags & QR_DIRECTORY) == 0) {
 166                 cprintf("%d No directory in this room.\n",
 167                         ERROR + NOT_HERE);
 168                 return;
 169         }
 170
 171         if (IsEmptyStr(filename)) {
 172                 cprintf("%d You must specify a file name.\n",
 173                         ERROR + FILE_NOT_FOUND);
 174                 return;
 175         }
 176
 177         for (a = 0; !IsEmptyStr(&filename[a]); ++a) {
 178                 if ( (filename[a] == '/') || (filename[a] == '\\') ) {
 179                         filename[a] = '_';
 180                 }
 181         }
 182         snprintf(pathname, sizeof pathname, "./files/%s/%s",
 183                  CC->room.QRdirname, filename);
 184         if (access(pathname, 0) != 0) {
 185                 cprintf("%d File '%s' not found.\n",
 186                         ERROR + FILE_NOT_FOUND, pathname);
 187                 return;
 188         }
 189
 190         if (CtdlGetRoom(&qrbuf, newroom) != 0) {
 191                 cprintf("%d '%s' does not exist.\n", ERROR + ROOM_NOT_FOUND, newroom);
 192                 return;
 193         }
 194         if ((qrbuf.QRflags & QR_DIRECTORY) == 0) {
 195                 cprintf("%d '%s' is not a directory room.\n",
 196                         ERROR + NOT_HERE, qrbuf.QRname);
 197                 return;
 198         }
 199         snprintf(newpath, sizeof newpath, "./files/%s/%s", qrbuf.QRdirname,
 200                  filename);
 201         if (link(pathname, newpath) != 0) {
 202                 cprintf("%d Couldn't move file: %s\n", ERROR + INTERNAL_ERROR,
 203                         strerror(errno));
 204                 return;
 205         }
 206         unlink(pathname);
 207
 208         /* this is a crude method of copying the file description */
 209         snprintf(buf, sizeof buf,
 210                  "cat ./files/%s/filedir |grep \"%s\" >>./files/%s/filedir",
 211                  CC->room.QRdirname, filename, qrbuf.QRdirname);
 212         system(buf);
 213         cprintf("%d File '%s' has been moved.\n", CIT_OK, filename);
 214 }
 215
 216
 217 /*
 218  * This code is common to all commands which open a file for downloading,
 219  * regardless of whether it's a file from the directory, an image, a network
 220  * spool file, a MIME attachment, etc.
 221  * It examines the file and displays the OK result code and some information
 222  * about the file.  NOTE: this stuff is Unix dependent.
 223  */
 224 void OpenCmdResult(char *filename, const char *mime_type)
 225 {
 226         struct stat statbuf;
 227         time_t modtime;
 228         long filesize;
 229
 230         fstat(fileno(CC->download_fp), &statbuf);
 231         CC->download_fp_total = statbuf.st_size;
 232         filesize = (long) statbuf.st_size;
 233         modtime = (time_t) statbuf.st_mtime;
 234
 235         cprintf("%d %ld|%ld|%s|%s\n",
 236                 CIT_OK, filesize, (long)modtime, filename, mime_type);
 237 }
 238
 239
 240 /*
 241  * open a file for downloading
 242  */
 243 void cmd_open(char *cmdbuf)
 244 {
 245         char filename[256];
 246         char pathname[PATH_MAX];
 247         int a;
 248
 249         extract_token(filename, cmdbuf, 0, '|', sizeof filename);
 250
 251         if (CtdlAccessCheck(ac_logged_in)) return;
 252
 253         if ((CC->room.QRflags & QR_DIRECTORY) == 0) {
 254                 cprintf("%d No directory in this room.\n",
 255                         ERROR + NOT_HERE);
 256                 return;
 257         }
 258
 259         if (IsEmptyStr(filename)) {
 260                 cprintf("%d You must specify a file name.\n",
 261                         ERROR + FILE_NOT_FOUND);
 262                 return;
 263         }
 264
 265         if (CC->download_fp != NULL) {
 266                 cprintf("%d You already have a download file open.\n",
 267                         ERROR + RESOURCE_BUSY);
 268                 return;
 269         }
 270
 271         for (a = 0; !IsEmptyStr(&filename[a]); ++a) {
 272                 if ( (filename[a] == '/') || (filename[a] == '\\') ) {
 273                         filename[a] = '_';
 274                 }
 275         }
 276
 277         snprintf(pathname, sizeof pathname,
 278                          "%s/%s/%s",
 279                          ctdl_file_dir,
 280                          CC->room.QRdirname, filename);
 281         CC->download_fp = fopen(pathname, "r");
 282
 283         if (CC->download_fp == NULL) {
 284                 cprintf("%d cannot open %s: %s\n",
 285                         ERROR + INTERNAL_ERROR, pathname, strerror(errno));
 286                 return;
 287         }
 288
 289         OpenCmdResult(filename, "application/octet-stream");
 290 }
 291
 292 /*
 293  * open an image file
 294  */
 295 void cmd_oimg(char *cmdbuf)
 296 {
 297         char filename[256];
 298         char pathname[PATH_MAX];
 299         char MimeTestBuf[32];
 300         struct ctdluser usbuf;
 301         char which_user[USERNAME_SIZE];
 302         int which_floor;
 303         int a;
 304         int rv;
 305
 306         extract_token(filename, cmdbuf, 0, '|', sizeof filename);
 307
 308         if (IsEmptyStr(filename)) {
 309                 cprintf("%d You must specify a file name.\n",
 310                         ERROR + FILE_NOT_FOUND);
 311                 return;
 312         }
 313
 314         if (CC->download_fp != NULL) {
 315                 cprintf("%d You already have a download file open.\n",
 316                         ERROR + RESOURCE_BUSY);
 317                 return;
 318         }
 319
 320         if (!strcasecmp(filename, "_userpic_")) {
 321                 extract_token(which_user, cmdbuf, 1, '|', sizeof which_user);
 322                 if (CtdlGetUser(&usbuf, which_user) != 0) {
 323                         cprintf("%d No such user.\n",
 324                                 ERROR + NO_SUCH_USER);
 325                         return;
 326                 }
 327                 snprintf(pathname, sizeof pathname,
 328                                  "%s/%ld",
 329                                  ctdl_usrpic_dir,
 330                                  usbuf.usernum);
 331         } else if (!strcasecmp(filename, "_floorpic_")) {
 332                 which_floor = extract_int(cmdbuf, 1);
 333                 snprintf(pathname, sizeof pathname,
 334                                  "%s/floor.%d",
 335                                  ctdl_image_dir, which_floor);
 336         } else if (!strcasecmp(filename, "_roompic_")) {
 337                 assoc_file_name(pathname, sizeof pathname, &CC->room, ctdl_image_dir);
 338         } else {
 339                 for (a = 0; !IsEmptyStr(&filename[a]); ++a) {
 340                         filename[a] = tolower(filename[a]);
 341                         if ( (filename[a] == '/') || (filename[a] == '\\') ) {
 342                                 filename[a] = '_';
 343                         }
 344                 }
 345                 snprintf(pathname, sizeof pathname,
 346                                  "%s/%s",
 347                                  ctdl_image_dir,
 348                                  filename);
 349         }
 350
 351         CC->download_fp = fopen(pathname, "rb");
 352         if (CC->download_fp == NULL) {
 353                 strcat(pathname, ".gif");
 354                 CC->download_fp = fopen(pathname, "rb");
 355         }
 356         if (CC->download_fp == NULL) {
 357                 cprintf("%d Cannot open %s: %s\n",
 358                         ERROR + FILE_NOT_FOUND, pathname, strerror(errno));
 359                 return;
 360         }
 361         rv = fread(&MimeTestBuf[0], 1, 32, CC->download_fp);
 362         if (rv == -1) {
 363                 cprintf("%d Cannot access %s: %s\n",
 364                         ERROR + FILE_NOT_FOUND, pathname, strerror(errno));
 365                 return;
 366         }
 367
 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                                 syslog(LOG_ALERT, "Cannot link %s to %s: %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  * read from the download file
 638  */
 639 void cmd_read(char *cmdbuf)
 640 {
 641         long start_pos;
 642         size_t bytes;
 643         char buf[SIZ];
 644
 645         /* The client will transmit its requested offset and byte count */
 646         start_pos = extract_long(cmdbuf, 0);
 647         bytes = extract_int(cmdbuf, 1);
 648
 649         if (CC->download_fp == NULL) {
 650                 cprintf("%d You don't have a download file open.\n",
 651                         ERROR + RESOURCE_NOT_OPEN);
 652                 return;
 653         }
 654
 655         /* If necessary, reduce the byte count to the size of our buffer */
 656         if (bytes > sizeof(buf)) {
 657                 bytes = sizeof(buf);
 658         }
 659
 660         fseek(CC->download_fp, start_pos, 0);
 661         bytes = fread(buf, 1, bytes, CC->download_fp);
 662         if (bytes > 0) {
 663                 /* Tell the client the actual byte count and transmit it */
 664                 cprintf("%d %d\n", BINARY_FOLLOWS, (int)bytes);
 665                 client_write(buf, bytes);
 666         }
 667         else {
 668                 cprintf("%d %s\n", ERROR, strerror(errno));
 669         }
 670 }
 671
 672
 673 /*
 674  * write to the upload file
 675  */
 676 void cmd_writ(char *cmdbuf)
 677 {
 678         int bytes;
 679         char *buf;
 680         int rv;
 681
 682         unbuffer_output();
 683
 684         bytes = extract_int(cmdbuf, 0);
 685
 686         if (CC->upload_fp == NULL) {
 687                 cprintf("%d You don't have an upload file open.\n", ERROR + RESOURCE_NOT_OPEN);
 688                 return;
 689         }
 690
 691         if (bytes > 100000) {
 692                 bytes = 100000;
 693         }
 694
 695         cprintf("%d %d\n", SEND_BINARY, bytes);
 696         buf = malloc(bytes + 1);
 697         client_read(buf, bytes);
 698         rv = fwrite(buf, bytes, 1, CC->upload_fp);
 699         if (rv == -1) {
 700                 syslog(LOG_EMERG, "Couldn't write: %s\n",
 701                        strerror(errno));
 702         }
 703         free(buf);
 704 }
 705
 706
 707
 708
 709 /*
 710  * cmd_ndop() - open a network spool file for downloading
 711  */
 712 void cmd_ndop(char *cmdbuf)
 713 {
 714         char pathname[256];
 715         struct stat statbuf;
 716
 717         if (IsEmptyStr(CC->net_node)) {
 718                 cprintf("%d Not authenticated as a network node.\n",
 719                         ERROR + NOT_LOGGED_IN);
 720                 return;
 721         }
 722
 723         if (CC->download_fp != NULL) {
 724                 cprintf("%d You already have a download file open.\n",
 725                         ERROR + RESOURCE_BUSY);
 726                 return;
 727         }
 728
 729         snprintf(pathname, sizeof pathname,
 730                          "%s/%s",
 731                          ctdl_netout_dir,
 732                          CC->net_node);
 733
 734         /* first open the file in append mode in order to create a
 735          * zero-length file if it doesn't already exist
 736          */
 737         CC->download_fp = fopen(pathname, "a");
 738         if (CC->download_fp != NULL)
 739                 fclose(CC->download_fp);
 740
 741         /* now open it */
 742         CC->download_fp = fopen(pathname, "r");
 743         if (CC->download_fp == NULL) {
 744                 cprintf("%d cannot open %s: %s\n",
 745                         ERROR + INTERNAL_ERROR, pathname, strerror(errno));
 746                 return;
 747         }
 748
 749
 750         /* set this flag so other routines know that the download file
 751          * currently open is a network spool file
 752          */
 753         CC->dl_is_net = 1;
 754
 755         stat(pathname, &statbuf);
 756         CC->download_fp_total = statbuf.st_size;
 757         cprintf("%d %ld\n", CIT_OK, (long)statbuf.st_size);
 758 }
 759
 760 /*
 761  * cmd_nuop() - open a network spool file for uploading
 762  */
 763 void cmd_nuop(char *cmdbuf)
 764 {
 765         static int seq = 1;
 766
 767         if (IsEmptyStr(CC->net_node)) {
 768                 cprintf("%d Not authenticated as a network node.\n",
 769                         ERROR + NOT_LOGGED_IN);
 770                 return;
 771         }
 772
 773         if (CC->upload_fp != NULL) {
 774                 cprintf("%d You already have an upload file open.\n",
 775                         ERROR + RESOURCE_BUSY);
 776                 return;
 777         }
 778
 779         snprintf(CC->upl_path, sizeof CC->upl_path,
 780                          "%s/%s.%04lx.%04x",
 781                          ctdl_nettmp_dir,
 782                          CC->net_node,
 783                          (long)getpid(),
 784                          ++seq);
 785
 786         CC->upload_fp = fopen(CC->upl_path, "r");
 787         if (CC->upload_fp != NULL) {
 788                 fclose(CC->upload_fp);
 789                 CC->upload_fp = NULL;
 790                 cprintf("%d '%s' already exists\n",
 791                         ERROR + ALREADY_EXISTS, CC->upl_path);
 792                 return;
 793         }
 794
 795         CC->upload_fp = fopen(CC->upl_path, "w");
 796         if (CC->upload_fp == NULL) {
 797                 cprintf("%d Cannot open %s: %s\n",
 798                         ERROR + INTERNAL_ERROR, CC->upl_path, strerror(errno));
 799                 return;
 800         }
 801
 802         CC->upload_type = UPL_NET;
 803         cprintf("%d Ok\n", CIT_OK);
 804 }
 805
 806
 807 /*****************************************************************************/
 808 /*                      MODULE INITIALIZATION STUFF                          */
 809 /*****************************************************************************/
 810
 811 CTDL_MODULE_INIT(file_ops)
 812 {
 813         if (!threading) {
 814                 CtdlRegisterProtoHook(cmd_delf, "DELF", "Delete a file");
 815                 CtdlRegisterProtoHook(cmd_movf, "MOVF", "Move a file");
 816                 CtdlRegisterProtoHook(cmd_open, "OPEN", "Open a download file transfer");
 817                 CtdlRegisterProtoHook(cmd_clos, "CLOS", "Close a download file transfer");
 818                 CtdlRegisterProtoHook(cmd_uopn, "UOPN", "Open an upload file transfer");
 819                 CtdlRegisterProtoHook(cmd_ucls, "UCLS", "Close an upload file transfer");
 820                 CtdlRegisterProtoHook(cmd_read, "READ", "File transfer read operation");
 821                 CtdlRegisterProtoHook(cmd_writ, "WRIT", "File transfer write operation");
 822                 CtdlRegisterProtoHook(cmd_ndop, "NDOP", "Open a network spool file for download");
 823                 CtdlRegisterProtoHook(cmd_nuop, "NUOP", "Open a network spool file for upload");
 824                 CtdlRegisterProtoHook(cmd_oimg, "OIMG", "Open an image file for download");
 825                 CtdlRegisterProtoHook(cmd_uimg, "UIMG", "Upload an image file");
 826                 CtdlRegisterCleanupHook(cleanup_nttlist);
 827         }
 828         /* return our Subversion id for the Log */
 829         return "file_ops";
 830 }