release/src/router/minidlna/inotify.c

   1 /* MiniDLNA media server
   2  * Copyright (C) 2008-2010  Justin Maggard
   3  *
   4  * This file is part of MiniDLNA.
   5  *
   6  * MiniDLNA is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * MiniDLNA is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with MiniDLNA. If not, see <http://www.gnu.org/licenses/>.
  17  */
  18 #include "config.h"
  19 #include <stdio.h>
  20 #include <string.h>
  21 #include <stdlib.h>
  22 #include <errno.h>
  23 #include <unistd.h>
  24 #include <dirent.h>
  25 #include <libgen.h>
  26 #include <errno.h>
  27 #include <sys/types.h>
  28 #include <sys/stat.h>
  29 #include <sys/time.h>
  30 #include <sys/resource.h>
  31 #include <poll.h>
  32 #ifdef HAVE_INOTIFY_H
  33 #include <sys/inotify.h>
  34 #else
  35 #include "linux/inotify.h"
  36 #include "linux/inotify-syscalls.h"
  37 #endif
  38
  39 #include "upnpglobalvars.h"
  40 #include "inotify.h"
  41 #include "utils.h"
  42 #include "sql.h"
  43 #include "scanner.h"
  44 #include "metadata.h"
  45 #include "albumart.h"
  46 #include "playlist.h"
  47 #include "log.h"
  48
  49 #define EVENT_SIZE  ( sizeof (struct inotify_event) )
  50 #define BUF_LEN     ( 1024 * ( EVENT_SIZE + 16 ) )
  51 #define DESIRED_WATCH_LIMIT 65536
  52
  53 #define PATH_BUF_SIZE PATH_MAX
  54
  55 struct watch
  56 {
  57         int wd;         /* watch descriptor */
  58         char *path;     /* watched path */
  59         struct watch *next;
  60 };
  61
  62 static struct watch *watches;
  63 static struct watch *lastwatch = NULL;
  64 static time_t next_pl_fill = 0;
  65
  66 char *get_path_from_wd(int wd)
  67 {
  68         struct watch *w = watches;
  69
  70         while( w != NULL )
  71         {
  72                 if( w->wd == wd )
  73                         return w->path;
  74                 w = w->next;
  75         }
  76
  77         return NULL;
  78 }
  79
  80 int
  81 add_watch(int fd, const char * path)
  82 {
  83         struct watch *nw;
  84         int wd;
  85
  86         wd = inotify_add_watch(fd, path, IN_CREATE|IN_CLOSE_WRITE|IN_DELETE|IN_MOVE);
  87         if( wd < 0 )
  88         {
  89                 DPRINTF(E_ERROR, L_INOTIFY, "inotify_add_watch(%s) [%s]\n", path, strerror(errno));
  90                 return -1;
  91         }
  92
  93         nw = malloc(sizeof(struct watch));
  94         if( nw == NULL )
  95         {
  96                 DPRINTF(E_ERROR, L_INOTIFY, "malloc() error\n");
  97                 return -1;
  98         }
  99         nw->wd = wd;
 100         nw->next = NULL;
 101         nw->path = strdup(path);
 102
 103         if( watches == NULL )
 104         {
 105                 watches = nw;
 106         }
 107
 108         if( lastwatch != NULL )
 109         {
 110                 lastwatch->next = nw;
 111         }
 112         lastwatch = nw;
 113
 114         return wd;
 115 }
 116
 117 int
 118 remove_watch(int fd, const char * path)
 119 {
 120         struct watch *w;
 121
 122         for( w = watches; w; w = w->next )
 123         {
 124                 if( strcmp(path, w->path) == 0 )
 125                         return(inotify_rm_watch(fd, w->wd));
 126         }
 127
 128         return 1;
 129 }
 130
 131 unsigned int
 132 next_highest(unsigned int num)
 133 {
 134         num |= num >> 1;
 135         num |= num >> 2;
 136         num |= num >> 4;
 137         num |= num >> 8;
 138         num |= num >> 16;
 139         return(++num);
 140 }
 141
 142 int
 143 inotify_create_watches(int fd)
 144 {
 145         FILE * max_watches;
 146         unsigned int num_watches, watch_limit = 8192;
 147         char **result;
 148         int i, rows = 0;
 149         struct media_dir_s * media_path;
 150
 151         i = sql_get_int_field(db, "SELECT count(*) from DETAILS where SIZE is NULL and PATH is not NULL");
 152         num_watches = (i < 0) ? 0 : i;
 153
 154         max_watches = fopen("/proc/sys/fs/inotify/max_user_watches", "r");
 155         if( max_watches )
 156         {
 157                 fscanf(max_watches, "%10u", &watch_limit);
 158                 fclose(max_watches);
 159                 if( (watch_limit < DESIRED_WATCH_LIMIT) || (watch_limit < (num_watches*3/4)) )
 160                 {
 161                         max_watches = fopen("/proc/sys/fs/inotify/max_user_watches", "w");
 162                         if( max_watches )
 163                         {
 164                                 if( DESIRED_WATCH_LIMIT >= (num_watches*3/4) )
 165                                 {
 166                                         fprintf(max_watches, "%u", DESIRED_WATCH_LIMIT);
 167                                 }
 168                                 else if( next_highest(num_watches) >= (num_watches*3/4) )
 169                                 {
 170                                         fprintf(max_watches, "%u", next_highest(num_watches));
 171                                 }
 172                                 else
 173                                 {
 174                                         fprintf(max_watches, "%u", next_highest(next_highest(num_watches)));
 175                                 }
 176                                 fclose(max_watches);
 177                         }
 178                         else
 179                         {
 180                                 DPRINTF(E_WARN, L_INOTIFY, "WARNING: Inotify max_user_watches [%u] is low or close to the number of used watches [%u] "
 181                                                         "and I do not have permission to increase this limit.  Please do so manually by "
 182                                                         "writing a higher value into /proc/sys/fs/inotify/max_user_watches.\n", watch_limit, num_watches);
 183                         }
 184                 }
 185         }
 186         else
 187         {
 188                 DPRINTF(E_WARN, L_INOTIFY, "WARNING: Could not read inotify max_user_watches!  "
 189                                         "Hopefully it is enough to cover %u current directories plus any new ones added.\n", num_watches);
 190         }
 191
 192         for( media_path = media_dirs; media_path != NULL; media_path = media_path->next )
 193         {
 194                 DPRINTF(E_DEBUG, L_INOTIFY, "Add watch to %s\n", media_path->path);
 195                 add_watch(fd, media_path->path);
 196         }
 197         sql_get_table(db, "SELECT PATH from DETAILS where SIZE is NULL and PATH is not NULL", &result, &rows, NULL);
 198         for( i=1; i <= rows; i++ )
 199         {
 200                 DPRINTF(E_DEBUG, L_INOTIFY, "Add watch to %s\n", result[i]);
 201                 add_watch(fd, result[i]);
 202         }
 203         sqlite3_free_table(result);
 204
 205         return rows;
 206 }
 207
 208 int
 209 inotify_remove_watches(int fd)
 210 {
 211         struct watch *w = watches;
 212         struct watch *last_w;
 213         int rm_watches = 0;
 214
 215         while( w )
 216         {
 217                 last_w = w;
 218                 inotify_rm_watch(fd, w->wd);
 219                 if( w->path )
 220                         free(w->path);
 221                 rm_watches++;
 222                 w = w->next;
 223                 free(last_w);
 224         }
 225
 226         return rm_watches;
 227 }
 228
 229 int add_dir_watch(int fd, char * path, char * filename)
 230 {
 231         DIR *ds;
 232         struct dirent *e;
 233         char *buf;
 234         int wd;
 235         int i = 0;
 236
 237         if( filename )
 238                 asprintf(&buf, "%s/%s", path, filename);
 239         else
 240                 buf = strdup(path);
 241
 242         wd = add_watch(fd, buf);
 243         if( wd == -1 )
 244         {
 245                 DPRINTF(E_ERROR, L_INOTIFY, "add_watch() [%s]\n", strerror(errno));
 246         }
 247         else
 248         {
 249                 DPRINTF(E_INFO, L_INOTIFY, "Added watch to %s [%d]\n", buf, wd);
 250         }
 251
 252         ds = opendir(buf);
 253         if( ds != NULL )
 254         {
 255                 while( (e = readdir(ds)) )
 256                 {
 257                         if( strcmp(e->d_name, ".") == 0 ||
 258                             strcmp(e->d_name, "..") == 0 )
 259                                 continue;
 260                         if( (e->d_type == DT_DIR) ||
 261                             (e->d_type == DT_UNKNOWN && resolve_unknown_type(buf, NO_MEDIA) == TYPE_DIR) )
 262                                 i += add_dir_watch(fd, buf, e->d_name);
 263                 }
 264         }
 265         else
 266         {
 267                 DPRINTF(E_ERROR, L_INOTIFY, "Opendir error! [%s]\n", strerror(errno));
 268         }
 269         closedir(ds);
 270         i++;
 271         free(buf);
 272
 273         return(i);
 274 }
 275
 276 int
 277 inotify_insert_file(char * name, const char * path)
 278 {
 279         int len;
 280         char * last_dir;
 281         char * path_buf;
 282         char * base_name;
 283         char * base_copy;
 284         char * parent_buf = NULL;
 285         char * id = NULL;
 286         int depth = 1;
 287         int ts;
 288         enum media_types type = ALL_MEDIA;
 289         struct media_dir_s * media_path = media_dirs;
 290         struct stat st;
 291
 292         /* Is it cover art for another file? */
 293         if( is_image(path) )
 294                 update_if_album_art(path);
 295         else if( ends_with(path, ".srt") )
 296                 check_for_captions(path, 0);
 297
 298         /* Check if we're supposed to be scanning for this file type in this directory */
 299         while( media_path )
 300         {
 301                 if( strncmp(path, media_path->path, strlen(media_path->path)) == 0 )
 302                 {
 303                         type = media_path->type;
 304                         break;
 305                 }
 306                 media_path = media_path->next;
 307         }
 308         switch( type )
 309         {
 310                 case ALL_MEDIA:
 311                         if( !is_image(path) &&
 312                             !is_audio(path) &&
 313                             !is_video(path) &&
 314                             !is_playlist(path) )
 315                                 return -1;
 316                         break;
 317                 case AUDIO_ONLY:
 318                         if( !is_audio(path) &&
 319                             !is_playlist(path) )
 320                                 return -1;
 321                         break;
 322                 case VIDEO_ONLY:
 323                         if( !is_video(path) )
 324                                 return -1;
 325                         break;
 326                 case IMAGES_ONLY:
 327                         if( !is_image(path) )
 328                                 return -1;
 329                         break;
 330                 default:
 331                         return -1;
 332                         break;
 333         }
 334
 335         /* If it's already in the database and hasn't been modified, skip it. */
 336         if( stat(path, &st) != 0 )
 337                 return -1;
 338
 339         ts = sql_get_int_field(db, "SELECT TIMESTAMP from DETAILS where PATH = '%q'", path);
 340         if( !ts && is_playlist(path) && (sql_get_int_field(db, "SELECT ID from PLAYLISTS where PATH = '%q'", path) > 0) )
 341         {
 342                 DPRINTF(E_DEBUG, L_INOTIFY, "Re-reading modified playlist.\n", path);
 343                 inotify_remove_file(path);
 344                 next_pl_fill = 1;
 345         }
 346         else if( ts < st.st_mtime )
 347         {
 348                 if( ts > 0 )
 349                         DPRINTF(E_DEBUG, L_INOTIFY, "%s is newer than the last db entry.\n", path);
 350                 inotify_remove_file(path);
 351         }
 352
 353         /* Find the parentID.  If it's not found, create all necessary parents. */
 354         len = strlen(path)+1;
 355         if( !(path_buf = malloc(len)) ||
 356             !(last_dir = malloc(len)) ||
 357             !(base_name = malloc(len)) )
 358                 return -1;
 359         base_copy = base_name;
 360         while( depth )
 361         {
 362                 depth = 0;
 363                 strcpy(path_buf, path);
 364                 parent_buf = dirname(path_buf);
 365
 366                 do
 367                 {
 368                         //DEBUG DPRINTF(E_DEBUG, L_INOTIFY, "Checking %s\n", parent_buf);
 369                         id = sql_get_text_field(db, "SELECT OBJECT_ID from OBJECTS o left join DETAILS d on (d.ID = o.DETAIL_ID)"
 370                                                     " where d.PATH = '%q' and REF_ID is NULL", parent_buf);
 371                         if( id )
 372                         {
 373                                 if( !depth )
 374                                         break;
 375                                 DPRINTF(E_DEBUG, L_INOTIFY, "Found first known parentID: %s [%s]\n", id, parent_buf);
 376                                 /* Insert newly-found directory */
 377                                 strcpy(base_name, last_dir);
 378                                 base_copy = basename(base_name);
 379                                 insert_directory(base_copy, last_dir, BROWSEDIR_ID, id+2, get_next_available_id("OBJECTS", id));
 380                                 sqlite3_free(id);
 381                                 break;
 382                         }
 383                         depth++;
 384                         strcpy(last_dir, parent_buf);
 385                         parent_buf = dirname(parent_buf);
 386                 }
 387                 while( strcmp(parent_buf, "/") != 0 );
 388
 389                 if( strcmp(parent_buf, "/") == 0 )
 390                 {
 391                         id = sqlite3_mprintf("%s", BROWSEDIR_ID);
 392                         depth = 0;
 393                         break;
 394                 }
 395                 strcpy(path_buf, path);
 396         }
 397         free(last_dir);
 398         free(path_buf);
 399         free(base_name);
 400
 401         if( !depth )
 402         {
 403                 //DEBUG DPRINTF(E_DEBUG, L_INOTIFY, "Inserting %s\n", name);
 404                 insert_file(name, path, id+2, get_next_available_id("OBJECTS", id));
 405                 sqlite3_free(id);
 406                 if( (is_audio(path) || is_playlist(path)) && next_pl_fill != 1 )
 407                 {
 408                         next_pl_fill = time(NULL) + 120; // Schedule a playlist scan for 2 minutes from now.
 409                         //DEBUG DPRINTF(E_WARN, L_INOTIFY,  "Playlist scan scheduled for %s", ctime(&next_pl_fill));
 410                 }
 411         }
 412         return depth;
 413 }
 414
 415 int
 416 inotify_insert_directory(int fd, char *name, const char * path)
 417 {
 418         DIR * ds;
 419         struct dirent * e;
 420         char *id, *path_buf, *parent_buf, *esc_name;
 421         int wd;
 422         enum file_types type = TYPE_UNKNOWN;
 423         enum media_types dir_type = ALL_MEDIA;
 424         struct media_dir_s * media_path;
 425         struct stat st;
 426
 427         if( access(path, R_OK|X_OK) != 0 )
 428         {
 429                 DPRINTF(E_WARN, L_INOTIFY, "Could not access %s [%s]\n", path, strerror(errno));
 430                 return -1;
 431         }
 432         if( sql_get_int_field(db, "SELECT ID from DETAILS where PATH = '%q'", path) > 0 )
 433         {
 434                 DPRINTF(E_DEBUG, L_INOTIFY, "%s already exists\n", path);
 435                 return 0;
 436         }
 437
 438         parent_buf = strdup(path);
 439         id = sql_get_text_field(db, "SELECT OBJECT_ID from OBJECTS o left join DETAILS d on (d.ID = o.DETAIL_ID)"
 440                                     " where d.PATH = '%q' and REF_ID is NULL", dirname(parent_buf));
 441         if( !id )
 442                 id = sqlite3_mprintf("%s", BROWSEDIR_ID);
 443         insert_directory(name, path, BROWSEDIR_ID, id+2, get_next_available_id("OBJECTS", id));
 444         sqlite3_free(id);
 445         free(parent_buf);
 446
 447         wd = add_watch(fd, path);
 448         if( wd == -1 )
 449         {
 450                 DPRINTF(E_ERROR, L_INOTIFY, "add_watch() failed\n");
 451         }
 452         else
 453         {
 454                 DPRINTF(E_INFO, L_INOTIFY, "Added watch to %s [%d]\n", path, wd);
 455         }
 456
 457         media_path = media_dirs;
 458         while( media_path )
 459         {
 460                 if( strncmp(path, media_path->path, strlen(media_path->path)) == 0 )
 461                 {
 462                         dir_type = media_path->type;
 463                         break;
 464                 }
 465                 media_path = media_path->next;
 466         }
 467
 468         ds = opendir(path);
 469         if( !ds )
 470         {
 471                 DPRINTF(E_ERROR, L_INOTIFY, "opendir failed! [%s]\n", strerror(errno));
 472                 return -1;
 473         }
 474         while( (e = readdir(ds)) )
 475         {
 476                 if( e->d_name[0] == '.' )
 477                         continue;
 478                 esc_name = escape_tag(e->d_name, 1);
 479                 asprintf(&path_buf, "%s/%s", path, e->d_name);
 480                 switch( e->d_type )
 481                 {
 482                         case DT_DIR:
 483                         case DT_REG:
 484                         case DT_LNK:
 485                         case DT_UNKNOWN:
 486                                 type = resolve_unknown_type(path_buf, dir_type);
 487                         default:
 488                                 break;
 489                 }
 490                 if( type == TYPE_DIR )
 491                 {
 492                         inotify_insert_directory(fd, esc_name, path_buf);
 493                 }
 494                 else if( type == TYPE_FILE )
 495                 {
 496                         if( (stat(path_buf, &st) == 0) && (st.st_blocks<<9 >= st.st_size) )
 497                         {
 498                                 inotify_insert_file(esc_name, path_buf);
 499                         }
 500                 }
 501                 free(esc_name);
 502                 free(path_buf);
 503         }
 504         closedir(ds);
 505
 506         return 0;
 507 }
 508
 509 int
 510 inotify_remove_file(const char * path)
 511 {
 512         char * sql;
 513         char **result;
 514         char * art_cache;
 515         char * ptr;
 516         sqlite_int64 detailID;
 517         int rows, playlist;
 518
 519         /* Invalidate the scanner cache so we don't insert files into non-existent containers */
 520         valid_cache = 0;
 521         playlist = is_playlist(path);
 522         sql = sql_get_text_field(db, "SELECT ID from %s where PATH = '%q'", playlist?"PLAYLISTS":"DETAILS", path);
 523         if( !sql )
 524                 return 1;
 525         detailID = strtoll(sql, NULL, 10);
 526         sqlite3_free(sql);
 527         if( playlist )
 528         {
 529                 sql_exec(db, "DELETE from PLAYLISTS where ID = %lld", detailID);
 530                 sql_exec(db, "DELETE from DETAILS where ID ="
 531                              " (SELECT DETAIL_ID from OBJECTS where OBJECT_ID = '%s$%lld')",
 532                          MUSIC_PLIST_ID, detailID);
 533                 sql_exec(db, "DELETE from OBJECTS where OBJECT_ID = '%s$%lld' or PARENT_ID = '%s$%lld'",
 534                          MUSIC_PLIST_ID, detailID, MUSIC_PLIST_ID, detailID);
 535         }
 536         else
 537         {
 538                 /* Delete the parent containers if we are about to empty them. */
 539                 asprintf(&sql, "SELECT PARENT_ID from OBJECTS where DETAIL_ID = %lld", detailID);
 540                 if( (sql_get_table(db, sql, &result, &rows, NULL) == SQLITE_OK) )
 541                 {
 542                         int i, children;
 543                         for( i=1; i <= rows; i++ )
 544                         {
 545                                 /* If it's a playlist item, adjust the item count of the playlist */
 546                                 if( strncmp(result[i], MUSIC_PLIST_ID, strlen(MUSIC_PLIST_ID)) == 0 )
 547                                 {
 548                                         sql_exec(db, "UPDATE PLAYLISTS set FOUND = (FOUND-1) where ID = %d",
 549                                                  atoi(strrchr(result[i], '$') + 1));
 550                                 }
 551
 552                                 children = sql_get_int_field(db, "SELECT count(*) from OBJECTS where PARENT_ID = '%s'", result[i]);
 553                                 if( children < 0 )
 554                                         continue;
 555                                 if( children < 2 )
 556                                 {
 557                                         sql_exec(db, "DELETE from DETAILS where ID ="
 558                                                      " (SELECT DETAIL_ID from OBJECTS where OBJECT_ID = '%s')", result[i]);
 559                                         sql_exec(db, "DELETE from OBJECTS where OBJECT_ID = '%s'", result[i]);
 560
 561                                         ptr = strrchr(result[i], '$');
 562                                         if( ptr )
 563                                                 *ptr = '\0';
 564                                         if( sql_get_int_field(db, "SELECT count(*) from OBJECTS where PARENT_ID = '%s'", result[i]) == 0 )
 565                                         {
 566                                                 sql_exec(db, "DELETE from DETAILS where ID ="
 567                                                              " (SELECT DETAIL_ID from OBJECTS where OBJECT_ID = '%s')", result[i]);
 568                                                 sql_exec(db, "DELETE from OBJECTS where OBJECT_ID = '%s'", result[i]);
 569                                         }
 570                                 }
 571                         }
 572                         sqlite3_free_table(result);
 573                 }
 574                 free(sql);
 575                 /* Now delete the actual objects */
 576                 sql_exec(db, "DELETE from DETAILS where ID = %lld", detailID);
 577                 sql_exec(db, "DELETE from OBJECTS where DETAIL_ID = %lld", detailID);
 578         }
 579         asprintf(&art_cache, "%s/art_cache%s", db_path, path);
 580         remove(art_cache);
 581         free(art_cache);
 582
 583         return 0;
 584 }
 585
 586 int
 587 inotify_remove_directory(int fd, const char * path)
 588 {
 589         char * sql;
 590         char **result;
 591         sqlite_int64 detailID = 0;
 592         int rows, i, ret = 1;
 593
 594         remove_watch(fd, path);
 595         sql = sqlite3_mprintf("SELECT ID from DETAILS where PATH glob '%q/*'"
 596                               " UNION ALL SELECT ID from DETAILS where PATH = '%q'", path, path);
 597         if( (sql_get_table(db, sql, &result, &rows, NULL) == SQLITE_OK) )
 598         {
 599                 if( rows )
 600                 {
 601                         for( i=1; i <= rows; i++ )
 602                         {
 603                                 detailID = strtoll(result[i], NULL, 10);
 604                                 sql_exec(db, "DELETE from DETAILS where ID = %lld", detailID);
 605                                 sql_exec(db, "DELETE from OBJECTS where DETAIL_ID = %lld", detailID);
 606                         }
 607                         ret = 0;
 608                 }
 609                 sqlite3_free_table(result);
 610         }
 611         sqlite3_free(sql);
 612         /* Clean up any album art entries in the deleted directory */
 613         sql_exec(db, "DELETE from ALBUM_ART where PATH glob '%q/*'", path);
 614
 615         return ret;
 616 }
 617
 618 void *
 619 start_inotify()
 620 {
 621         struct pollfd pollfds[1];
 622         int timeout = 1000;
 623         char buffer[BUF_LEN];
 624         char path_buf[PATH_MAX];
 625         int length, i = 0;
 626         char * esc_name = NULL;
 627         struct stat st;
 628
 629         pollfds[0].fd = inotify_init();
 630         pollfds[0].events = POLLIN;
 631
 632         if ( pollfds[0].fd < 0 )
 633                 DPRINTF(E_ERROR, L_INOTIFY, "inotify_init() failed!\n");
 634
 635         while( scanning )
 636         {
 637                 if( quitting )
 638                         goto quitting;
 639                 sleep(1);
 640         }
 641         inotify_create_watches(pollfds[0].fd);
 642         if (setpriority(PRIO_PROCESS, 0, 19) == -1)
 643                 DPRINTF(E_WARN, L_INOTIFY,  "Failed to reduce inotify thread priority\n");
 644
 645         while( !quitting )
 646         {
 647                 length = poll(pollfds, 1, timeout);
 648                 if( !length )
 649                 {
 650                         if( next_pl_fill && (time(NULL) >= next_pl_fill) )
 651                         {
 652                                 fill_playlists();
 653                                 next_pl_fill = 0;
 654                         }
 655                         continue;
 656                 }
 657                 else if( length < 0 )
 658                 {
 659                         if( (errno == EINTR) || (errno == EAGAIN) )
 660                                 continue;
 661                         else
 662                                 DPRINTF(E_ERROR, L_INOTIFY, "read failed!\n");
 663                 }
 664                 else
 665                 {
 666                         length = read(pollfds[0].fd, buffer, BUF_LEN);
 667                 }
 668
 669                 i = 0;
 670                 while( i < length )
 671                 {
 672                         struct inotify_event * event = (struct inotify_event *) &buffer[i];
 673                         if( event->len )
 674                         {
 675                                 if( *(event->name) == '.' )
 676                                 {
 677                                         i += EVENT_SIZE + event->len;
 678                                         continue;
 679                                 }
 680                                 esc_name = modifyString(strdup(event->name), "&", "&amp;amp;", 0);
 681                                 sprintf(path_buf, "%s/%s", get_path_from_wd(event->wd), event->name);
 682                                 if ( event->mask & IN_ISDIR && (event->mask & (IN_CREATE|IN_MOVED_TO)) )
 683                                 {
 684                                         DPRINTF(E_DEBUG, L_INOTIFY,  "The directory %s was %s.\n",
 685                                                 path_buf, (event->mask & IN_MOVED_TO ? "moved here" : "created"));
 686                                         begin_scan();
 687                                         sleep(5);
 688                                         if ( wait_for_mount(path_buf) >= 0 )
 689                                                 inotify_insert_directory(pollfds[0].fd, esc_name, path_buf);
 690                                         end_scan();
 691                                 }
 692                                 else if ( (event->mask & (IN_CLOSE_WRITE|IN_MOVED_TO|IN_CREATE)) &&
 693                                           (lstat(path_buf, &st) == 0) )
 694                                 {
 695                                         if( S_ISLNK(st.st_mode) )
 696                                         {
 697                                                 DPRINTF(E_DEBUG, L_INOTIFY, "The symbolic link %s was %s.\n",
 698                                                         path_buf, (event->mask & IN_MOVED_TO ? "moved here" : "created"));
 699                                                 if( stat(path_buf, &st) == 0 && S_ISDIR(st.st_mode) )
 700                                                         inotify_insert_directory(pollfds[0].fd, esc_name, path_buf);
 701                                                 else
 702                                                         inotify_insert_file(esc_name, path_buf);
 703                                         }
 704                                         else if( event->mask & (IN_CLOSE_WRITE|IN_MOVED_TO) && st.st_size > 0 )
 705                                         {
 706                                                 if( (event->mask & IN_MOVED_TO) ||
 707                                                     (sql_get_int_field(db, "SELECT TIMESTAMP from DETAILS where PATH = '%q'", path_buf) != st.st_mtime) )
 708                                                 {
 709                                                         DPRINTF(E_DEBUG, L_INOTIFY, "The file %s was %s.\n",
 710                                                                 path_buf, (event->mask & IN_MOVED_TO ? "moved here" : "changed"));
 711                                                         inotify_insert_file(esc_name, path_buf);
 712                                                 }
 713                                         }
 714                                 }
 715                                 else if ( event->mask & (IN_DELETE|IN_MOVED_FROM) )
 716                                 {
 717                                         DPRINTF(E_DEBUG, L_INOTIFY, "The %s %s was %s.\n",
 718                                                 (event->mask & IN_ISDIR ? "directory" : "file"),
 719                                                 path_buf, (event->mask & IN_MOVED_FROM ? "moved away" : "deleted"));
 720                                         if ( event->mask & IN_ISDIR )
 721                                                 inotify_remove_directory(pollfds[0].fd, path_buf);
 722                                         else
 723                                                 inotify_remove_file(path_buf);
 724                                 }
 725                                 free(esc_name);
 726                         }
 727                         i += EVENT_SIZE + event->len;
 728                 }
 729         }
 730         inotify_remove_watches(pollfds[0].fd);
 731 quitting:
 732         close(pollfds[0].fd);
 733
 734         return 0;
 735 }