Support for more than one video directory

12 files changed, 352 insertions, 75 deletions

diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index 0201f80c..c24496f1 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -5,6 +5,7 @@ Carsten Koch <Carsten.Koch@icem.de>
  for making the 'Recordings' menu be listed alphabetically
  for implementing the 'Summary' feature
  for adding the 'epg2timers' tool (see Tools/epg2timers)
+ for his idea of using multiple disks (and for testing this feature)
 
 Plamen Ganev <pganev@com-it.net>
  for fixing the frequency offset for Hotbird channels
diff --git a/HISTORY b/HISTORY
index f95ac51f..36bc8d71 100644
--- a/HISTORY
+++ b/HISTORY
@@ -100,9 +100,12 @@ Video Disk Recorder Revision History
   the 'timers.conf' file with a text editor, or by defining/modifying the timer
   via the SVDRP interface.
 
-2000-07-28:
+2000-07-29:
 
 - When scrolling through a list it now moves a full page up or down when the
   cursor reaches the top or bottom of the menu (thanks to Heino Goldenstein!).
 - Added missing '#include <sys/stat.h>' to recording.c.
 - The video directory can now be defined with the command line option -v.
+- There can now be more than one video directory (in case you have several
+  disks).
+- Fixed learning key codes for PC keyboard.
diff --git a/INSTALL b/INSTALL
index 3261ef00..6bf3a9fd 100644
--- a/INSTALL
+++ b/INSTALL
@@ -49,6 +49,9 @@ If the program shall run as a daemon, use the --daemon option. This
 will completely detach it from the terminal and will continue as a
 background process.
 
+Command line options:
+---------------------
+
 Use "vdr --help" for a list of available command line options.
 
 The video data directory:
@@ -57,14 +60,41 @@ The video data directory:
 All recordings are written into directories below "/video". Please
 make sure this directory exists, and that the user who runs the 'vdr'
 program has read and write access to that directory.
-If you prefer a different location for your video files, you can change
-the value of 'BaseDir' in recording.c.
+If you prefer a different location for your video files, you can use
+the '-v' option to change that.
 
 Note that the file system need not be 64-bit proof, since the 'vdr'
 program splits video files into chunks of about 1GB. You should use
 a disk with several gigabytes of free space. One GB can store roughly
 half an hour of video data.
 
+If you have more than one disk and don't want to combine them to form
+one large logical volume, you can set up several video directories as
+mount points for these disks. All of these directories must have the
+same basic name and must end with a numeric part, which starts at 0 for
+the main directory and has increasing values for the rest of the
+directories. For example
+
+   /video0
+   /video1
+   /video2
+
+would be a setup with three directories. You can use more than one
+numeric digit, and the directories need not be directly under '/':
+
+   /mnt/MyVideos/vdr.00
+   /mnt/MyVideos/vdr.01
+   /mnt/MyVideos/vdr.02
+   ...
+   /mnt/MyVideos/vdr.11
+
+would set up twelve disks (wow, what a machine that would be!).
+
+To use such a multi directory setup, you need to add the '-v' option
+with the name of the basic directory when running 'vdr':
+
+   vdr -v /video0
+
 Configuration files:
 --------------------
 
diff --git a/Makefile b/Makefile
index 8fb678bc..f71236b7 100644
--- a/Makefile
+++ b/Makefile
@@ -4,9 +4,9 @@
 # See the main source file 'vdr.c' for copyright information and
 # how to reach the author.
 #
-# $Id: Makefile 1.5 2000/07/23 11:57:14 kls Exp $
+# $Id: Makefile 1.6 2000/07/28 14:37:44 kls Exp $
 
-OBJS = config.o dvbapi.o interface.o menu.o osd.o recording.o remote.o svdrp.o tools.o vdr.o
+OBJS = config.o dvbapi.o interface.o menu.o osd.o recording.o remote.o svdrp.o tools.o vdr.o videodir.o
 
 ifndef REMOTE
 REMOTE = KBD
@@ -24,15 +24,16 @@ endif
 all: vdr
 
 config.o   : config.c config.h dvbapi.h interface.h tools.h
-dvbapi.o   : dvbapi.c config.h dvbapi.h interface.h tools.h
+dvbapi.o   : dvbapi.c config.h dvbapi.h interface.h tools.h videodir.h
 interface.o: interface.c config.h dvbapi.h interface.h remote.h tools.h
 menu.o     : menu.c config.h dvbapi.h interface.h menu.h osd.h recording.h tools.h
 osd.o      : osd.c config.h dvbapi.h interface.h osd.h tools.h
-vdr.o      : vdr.c config.h dvbapi.h interface.h menu.h osd.h recording.h svdrp.h tools.h
-recording.o: recording.c config.h dvbapi.h interface.h recording.h tools.h
+vdr.o      : vdr.c config.h dvbapi.h interface.h menu.h osd.h recording.h svdrp.h tools.h videodir.h
+recording.o: recording.c config.h dvbapi.h interface.h recording.h tools.h videodir.h
 remote.o   : remote.c remote.h tools.h
 svdrp.o    : svdrp.c svdrp.h config.h interface.h tools.h
 tools.o    : tools.c tools.h
+videodir.o : videodir.c tools.h videodir.h
 
 vdr: $(OBJS)
 	g++ -g -O2 $(OBJS) -lncurses -o vdr
diff --git a/dvbapi.c b/dvbapi.c
index a9673a7a..2f726ed5 100644
--- a/dvbapi.c
+++ b/dvbapi.c
@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: dvbapi.c 1.15 2000/07/21 13:18:02 kls Exp $
+ * $Id: dvbapi.c 1.16 2000/07/29 14:49:46 kls Exp $
  */
 
 #include "dvbapi.h"
@@ -17,6 +17,7 @@
 #include <unistd.h>
 #include "interface.h"
 #include "tools.h"
+#include "videodir.h"
 
 #define VIDEODEVICE "/dev/video"
 
@@ -50,9 +51,12 @@
 // 'signed'), so let's use 1GB for absolute safety (the actual file size
 // may be slightly higher because we stop recording only before the next
 // 'I' frame, to have a complete Group Of Pictures):
-#define MAXVIDEOFILESIZE (1024*1024*1024)
+#define MAXVIDEOFILESIZE (1024*1024*1024) // Byte
 #define MAXFILESPERRECORDING 255
 
+#define MINFREEDISKSPACE    (512) // MB
+#define DISKCHECKINTERVAL   100 // seconds
+
 #define INDEXFILESUFFIX     "/index.vdr"
 #define RESUMEFILESUFFIX    "/resume.vdr"
 #define RECORDFILESUFFIX    "/%03d.vdr"
@@ -598,6 +602,8 @@ private:
   int recordFile;
   uchar tagAudio, tagVideo;
   bool ok, synced;
+  time_t lastDiskSpaceCheck;
+  bool RunningLowOnDiskSpace(void);
   int Synchronize(void);
   bool NextFile(void);
   virtual int Write(int Max = -1);
@@ -615,6 +621,7 @@ cRecordBuffer::cRecordBuffer(int *InFile, const char *FileName)
   recordFile = -1;
   tagAudio = tagVideo = 0;
   ok = synced = false;
+  lastDiskSpaceCheck = time(NULL);
   if (!fileName)
      return;//XXX find a better way???
   // Find the highest existing file suffix:
@@ -636,7 +643,20 @@ cRecordBuffer::cRecordBuffer(int *InFile, const char *FileName)
 cRecordBuffer::~cRecordBuffer()
 {
   if (recordFile >= 0)
-     close(recordFile);
+     CloseVideoFile(recordFile);
+}
+
+bool cRecordBuffer::RunningLowOnDiskSpace(void)
+{
+  if (time(NULL) > lastDiskSpaceCheck + DISKCHECKINTERVAL) {
+     uint Free = FreeDiskSpaceMB(fileName);
+     lastDiskSpaceCheck = time(NULL);
+     if (Free < MINFREEDISKSPACE) {
+        dsyslog(LOG_INFO, "low disk space (%d MB, limit is %d MB)", Free, MINFREEDISKSPACE);
+        return true;
+        }
+     }
+  return false;
 }
 
 int cRecordBuffer::Synchronize(void)
@@ -714,20 +734,22 @@ int cRecordBuffer::Synchronize(void)
 
 bool cRecordBuffer::NextFile(void)
 {
-  if (recordFile >= 0 && fileSize > MAXVIDEOFILESIZE && pictureType == I_FRAME) {
-     if (close(recordFile) < 0)
-        LOG_ERROR;
-        // don't return 'false', maybe we can still record into the next file
-     recordFile = -1;
-     fileNumber++;
-     if (fileNumber == 0)
-        esyslog(LOG_ERR, "ERROR: max number of files (%d) exceeded", MAXFILESPERRECORDING);
-     fileSize = 0;
+  if (recordFile >= 0 && pictureType == I_FRAME) { // every file shall start with an I_FRAME
+     if (fileSize > MAXVIDEOFILESIZE || RunningLowOnDiskSpace()) {
+        if (CloseVideoFile(recordFile) < 0)
+           LOG_ERROR;
+           // don't return 'false', maybe we can still record into the next file
+        recordFile = -1;
+        fileNumber++;
+        if (fileNumber == 0)
+           esyslog(LOG_ERR, "ERROR: max number of files (%d) exceeded", MAXFILESPERRECORDING);
+        fileSize = 0;
+        }
      }
   if (recordFile < 0) {
      sprintf(pFileNumber, RECORDFILESUFFIX, fileNumber);
      dsyslog(LOG_INFO, "recording to '%s'", fileName);
-     recordFile = open(fileName, O_RDWR | O_CREAT | O_NONBLOCK, S_IRUSR | S_IWUSR);
+     recordFile = OpenVideoFile(fileName, O_RDWR | O_CREAT | O_NONBLOCK);
      if (recordFile < 0) {
         LOG_ERROR;
         return false;
diff --git a/recording.c b/recording.c
index 277b9114..9f3b3885 100644
--- a/recording.c
+++ b/recording.c
@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: recording.c 1.14 2000/07/28 12:47:54 kls Exp $
+ * $Id: recording.c 1.15 2000/07/29 14:08:17 kls Exp $
  */
 
 #define _GNU_SOURCE
@@ -17,6 +17,7 @@
 #include <unistd.h>
 #include "interface.h"
 #include "tools.h"
+#include "videodir.h"
 
 #define RECEXT       ".rec"
 #define DELEXT       ".del"
@@ -25,40 +26,12 @@
 
 #define SUMMARYFILESUFFIX "/summary.vdr"
 
-#define FINDCMD      "find %s -type d -name '%s' | sort -df"
+#define FINDCMD      "find %s -follow -type d -name '%s' 2> /dev/null | sort -df"
 
-#define DFCMD        "df -m %s"
 #define MINDISKSPACE 1024 // MB
 
 #define DISKCHECKDELTA 300 // seconds between checks for free disk space
 
-const char *VideoDirectory = "/video";
-
-static bool LowDiskSpace(void)
-{
-  //TODO Find a simpler way to determine the amount of free disk space!
-  bool result = true;
-  char *cmd = NULL;
-  asprintf(&cmd, DFCMD, VideoDirectory);
-  FILE *p = popen(cmd, "r");
-  if (p) {
-     char *s;
-     while ((s = readline(p)) != NULL) {
-           if (*s == '/') {
-              int available;
-              sscanf(s, "%*s %*d %*d %d", &available);
-              result = available < MINDISKSPACE;
-              break;
-              }
-           }
-     pclose(p);
-     }
-  else
-     esyslog(LOG_ERR, "ERROR: can't open pipe for cmd '%s'", cmd);
-  delete cmd;
-  return result;
-}
-
 void AssertFreeDiskSpace(void)
 {
   // With every call to this function we try to actually remove
@@ -66,7 +39,7 @@ void AssertFreeDiskSpace(void)
   // it will get removed during the next call.
   static time_t LastFreeDiskCheck = 0;
   if (time(NULL) - LastFreeDiskCheck > DISKCHECKDELTA) {
-     if (LowDiskSpace()) {
+     if (!VideoFileSpaceAvailable(MINDISKSPACE)) {
         // Remove the oldest file that has been "deleted":
         cRecordings Recordings;
         if (Recordings.Load(true)) {
@@ -240,10 +213,7 @@ bool cRecording::Delete(void)
   if (strcmp(ext, RECEXT) == 0) {
      strncpy(ext, DELEXT, strlen(ext));
      isyslog(LOG_INFO, "deleting recording %s", FileName());
-     if (rename(FileName(), NewName) == -1) {
-        esyslog(LOG_ERR, "ERROR: %s: %s", FileName(), strerror(errno));
-        result = false;
-        }
+     result = RenameVideoFile(FileName(), NewName);
      }
   delete NewName;
   return result;
@@ -252,7 +222,7 @@ bool cRecording::Delete(void)
 bool cRecording::Remove(void)
 {
   isyslog(LOG_INFO, "removing recording %s", FileName());
-  return RemoveFileOrDir(FileName());
+  return RemoveVideoFile(FileName());
 }
 
 // --- cRecordings -----------------------------------------------------------
diff --git a/recording.h b/recording.h
index ae17cd3c..dc3b3d74 100644
--- a/recording.h
+++ b/recording.h
@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: recording.h 1.8 2000/07/28 12:48:06 kls Exp $
+ * $Id: recording.h 1.9 2000/07/28 13:53:54 kls Exp $
  */
 
 #ifndef __RECORDING_H
@@ -14,8 +14,6 @@
 #include "config.h"
 #include "tools.h"
 
-extern const char *VideoDirectory;
-
 void AssertFreeDiskSpace(void);
 
 class cRecording : public cListObject {
diff --git a/tools.c b/tools.c
index 88acd333..83cb51ef 100644
--- a/tools.c
+++ b/tools.c
@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: tools.c 1.11 2000/07/28 13:22:10 kls Exp $
+ * $Id: tools.c 1.12 2000/07/29 14:02:41 kls Exp $
  */
 
 #define _GNU_SOURCE
@@ -145,20 +145,47 @@ bool isnumber(const char *s)
   return true;
 }
 
-bool DirectoryOk(const char *DirName)
+#define DFCMD  "df -m %s"
+
+uint FreeDiskSpaceMB(const char *Directory)
+{
+  //TODO Find a simpler way to determine the amount of free disk space!
+  uint Free = 0;
+  char *cmd = NULL;
+  asprintf(&cmd, DFCMD, Directory);
+  FILE *p = popen(cmd, "r");
+  if (p) {
+     char *s;
+     while ((s = readline(p)) != NULL) {
+           if (*s == '/') {
+              uint available;
+              sscanf(s, "%*s %*d %*d %u", &available);
+              Free = available;
+              break;
+              }
+           }
+     pclose(p);
+     }
+  else
+     esyslog(LOG_ERR, "ERROR: can't open pipe for cmd '%s'", cmd);
+  delete cmd;
+  return Free;
+}
+
+bool DirectoryOk(const char *DirName, bool LogErrors)
 {
   struct stat ds;
   if (stat(DirName, &ds) == 0) {
      if (S_ISDIR(ds.st_mode)) {
         if (access(DirName, R_OK | W_OK | X_OK) == 0)
            return true;
-        else
+        else if (LogErrors)
            esyslog(LOG_ERR, "ERROR: can't access %s", DirName);
         }
-     else
+     else if (LogErrors)
         esyslog(LOG_ERR, "ERROR: %s is not a directory", DirName);
      }
-  else
+  else if (LogErrors)
      LOG_ERROR_STR(DirName);
   return false;
 }
@@ -175,7 +202,7 @@ bool MakeDirs(const char *FileName, bool IsDirectory)
            *p = 0;
         struct stat fs;
         if (stat(s, &fs) != 0 || !S_ISDIR(fs.st_mode)) {
-           isyslog(LOG_INFO, "creating directory %s", s);
+           dsyslog(LOG_INFO, "creating directory %s", s);
            if (mkdir(s, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) == -1) {
               esyslog(LOG_ERR, "ERROR: %s: %s", s, strerror(errno));
               result = false;
@@ -191,7 +218,7 @@ bool MakeDirs(const char *FileName, bool IsDirectory)
   return result;
 }
 
-bool RemoveFileOrDir(const char *FileName)
+bool RemoveFileOrDir(const char *FileName, bool FollowSymlinks)
 {
   struct stat st;
   if (stat(FileName, &st) == 0) {
@@ -203,23 +230,43 @@ bool RemoveFileOrDir(const char *FileName)
                  if (strcmp(e->d_name, ".") && strcmp(e->d_name, "..")) {
                     char *buffer;
                     asprintf(&buffer, "%s/%s", FileName, e->d_name);
+                    if (FollowSymlinks) {
+                       int size = strlen(buffer) * 2; // should be large enough
+                       char *l = new char[size];
+                       int n = readlink(buffer, l, size);
+                       if (n < 0) {
+                          if (errno != EINVAL)
+                             LOG_ERROR_STR(buffer);
+                          }
+                       else if (n < size) {
+                          l[n] = 0;
+                          dsyslog(LOG_INFO, "removing %s", l);
+                          if (remove(l) < 0)
+                             LOG_ERROR_STR(l);
+                          }
+                       else
+                          esyslog(LOG_ERR, "symlink name length (%d) exceeded anticipated buffer size (%d)", n, size);
+                       delete l;
+                       }
+                    dsyslog(LOG_INFO, "removing %s", buffer);
                     if (remove(buffer) < 0)
-                       esyslog(LOG_ERR, "ERROR: %s: %s", buffer, strerror(errno));
+                       LOG_ERROR_STR(buffer);
                     delete buffer;
                     }
                  }
            closedir(d);
            }
         else {
-           esyslog(LOG_ERR, "ERROR: %s: %s", FileName, strerror(errno));
+           LOG_ERROR_STR(FileName);
            return false;
            }
         }
+     dsyslog(LOG_INFO, "removing %s", FileName);
      if (remove(FileName) == 0)
         return true;
      }
   else
-     esyslog(LOG_ERR, "ERROR: %s: %s", FileName, strerror(errno));
+     LOG_ERROR_STR(FileName);
   return false;
 }
 
diff --git a/tools.h b/tools.h
index dc22033d..563f3d06 100644
--- a/tools.h
+++ b/tools.h
@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: tools.h 1.11 2000/07/28 13:02:05 kls Exp $
+ * $Id: tools.h 1.12 2000/07/29 10:56:00 kls Exp $
  */
 
 #ifndef __TOOLS_H
@@ -43,9 +43,10 @@ char *skipspace(char *s);
 int time_ms(void);
 void delay_ms(int ms);
 bool isnumber(const char *s);
-bool DirectoryOk(const char *DirName);
+uint FreeDiskSpaceMB(const char *Directory);
+bool DirectoryOk(const char *DirName, bool LogErrors = false);
 bool MakeDirs(const char *FileName, bool IsDirectory = false);
-bool RemoveFileOrDir(const char *FileName);
+bool RemoveFileOrDir(const char *FileName, bool FollowSymlinks = false);
 bool CheckProcess(pid_t pid);
 void KillProcess(pid_t pid, int Timeout = MAXPROCESSTIMEOUT);
 
diff --git a/vdr.c b/vdr.c
index 36ddcb42..51422234 100644
--- a/vdr.c
+++ b/vdr.c
@@ -22,7 +22,7 @@
  *
  * The project's page is at http://www.cadsoft.de/people/kls/vdr
  *
- * $Id: vdr.c 1.24 2000/07/28 13:14:19 kls Exp $
+ * $Id: vdr.c 1.25 2000/07/28 15:55:31 kls Exp $
  */
 
 #include <getopt.h>
@@ -36,6 +36,7 @@
 #include "recording.h"
 #include "svdrp.h"
 #include "tools.h"
+#include "videodir.h"
 
 #ifdef REMOTE_KBD
 #define KEYS_CONF "keys-pc.conf"
@@ -105,7 +106,7 @@ int main(int argc, char *argv[])
 
   // Check the video directory:
 
-  if (!DirectoryOk(VideoDirectory)) {
+  if (!DirectoryOk(VideoDirectory, true)) {
      fprintf(stderr, "vdr: can't access video directory %s\n", VideoDirectory);
      abort();
      }
diff --git a/videodir.c b/videodir.c
new file mode 100644
index 00000000..7bd6299a
--- /dev/null
+++ b/videodir.c
@@ -0,0 +1,182 @@
+/*
+ * videodir.c: Functions to maintain a distributed video directory
+ *
+ * See the main source file 'vdr.c' for copyright information and
+ * how to reach the author.
+ *
+ * $Id: videodir.c 1.1 2000/07/29 15:21:42 kls Exp $
+ */
+
+#include "videodir.h"
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include "tools.h"
+
+const char *VideoDirectory = "/video";
+
+class cVideoDirectory {
+private:
+  char *name, *stored, *adjusted;
+  int length, number, digits;
+public:
+  cVideoDirectory(void);
+  ~cVideoDirectory();
+  uint FreeMB(void);
+  const char *Name(void) { return name; }
+  const char *Stored(void) { return stored; }
+  int Length(void) { return length; }
+  bool IsDistributed(void) { return name != NULL; }
+  bool Next(void);
+  void Store(void);
+  const char *Adjust(const char *FileName);
+  };
+
+cVideoDirectory::cVideoDirectory(void)
+{
+  length = strlen(VideoDirectory);
+  name = (VideoDirectory[length - 1] == '0') ? strdup(VideoDirectory) : NULL;
+  stored = adjusted = NULL;
+  number = -1;
+  digits = 0;
+}
+
+cVideoDirectory::~cVideoDirectory()
+{
+  delete name;
+  delete stored;
+  delete adjusted;
+}
+
+uint cVideoDirectory::FreeMB(void)
+{
+  return FreeDiskSpaceMB(name ? name : VideoDirectory);
+}
+
+bool cVideoDirectory::Next(void)
+{
+  if (name) {
+     if (number < 0) {
+        int l = length;
+        while (l-- > 0 && isdigit(name[l]))
+              ;
+        l++;
+        digits = length - l;
+        int n = atoi(&name[l]);
+        if (n == 0)
+           number = n;
+        else
+           return false; // base video directory must end with zero
+        }
+     if (++number > 0) {
+        char buf[16];
+        if (sprintf(buf, "%0*d", digits, number) == digits) {
+           strcpy(&name[length - digits], buf);
+           return DirectoryOk(name);
+           }
+        }
+     }
+  return false;
+}
+
+void cVideoDirectory::Store(void)
+{
+  if (name) {
+     delete stored;
+     stored = strdup(name);
+     }
+}
+
+const char *cVideoDirectory::Adjust(const char *FileName)
+{
+  if (stored) {
+     delete adjusted;
+     adjusted = strdup(FileName);
+     return strncpy(adjusted, stored, length);
+     }
+  return NULL;
+}
+
+int OpenVideoFile(const char *FileName, int Flags)
+{
+  const char *ActualFileName = FileName;
+
+  // Incoming name must be in base video directory:
+  if (strstr(FileName, VideoDirectory) != FileName) {
+     esyslog(LOG_ERR, "ERROR: %s not in %s", FileName, VideoDirectory);
+     errno = ENOENT; // must set 'errno' - any ideas for a better value?
+     return -1;
+     }
+  // Are we going to create a new file?
+  if ((Flags & O_CREAT) != 0) {
+     cVideoDirectory Dir;
+     if (Dir.IsDistributed()) {
+        // Find the directory with the most free space:
+        uint MaxFree = Dir.FreeMB();
+        while (Dir.Next()) {
+              uint Free = FreeDiskSpaceMB(Dir.Name());
+              if (Free > MaxFree) {
+                 Dir.Store();
+                 MaxFree = Free;
+                 }
+              }
+        if (Dir.Stored()) {
+           ActualFileName = Dir.Adjust(FileName);
+           if (!MakeDirs(ActualFileName, false))
+              return -1; // errno has been set by MakeDirs()
+           if (symlink(ActualFileName, FileName) < 0) {
+              LOG_ERROR_STR(FileName);
+              return -1;
+              }
+           ActualFileName = strdup(ActualFileName); // must survive Dir!
+           }
+        }
+     }
+  int Result = open(ActualFileName, Flags, S_IRUSR | S_IWUSR);
+  if (ActualFileName != FileName)
+     delete ActualFileName;
+  return Result;
+}
+
+int CloseVideoFile(int FileHandle)
+{
+  // just in case we ever decide to do something special when closing the file!
+  return close(FileHandle);
+}
+
+bool RenameVideoFile(const char *OldName, const char *NewName)
+{
+  // Only the base video directory entry will be renamed, leaving the
+  // possible symlinks untouched. Going through all the symlinks and disks
+  // would be unnecessary work - maybe later...
+  if (rename(OldName, NewName) == -1) {
+     LOG_ERROR_STR(OldName);
+     return false;
+     }
+  return true;
+}
+
+bool RemoveVideoFile(const char *FileName)
+{
+  return RemoveFileOrDir(FileName, true);
+}
+
+bool VideoFileSpaceAvailable(unsigned int SizeMB)
+{
+  cVideoDirectory Dir;
+  if (Dir.IsDistributed()) {
+     if (Dir.FreeMB() >= SizeMB * 2) // base directory needs additional space
+        return true;
+     while (Dir.Next()) {
+           if (Dir.FreeMB() >= SizeMB)
+              return true;
+           }
+     return false;
+     }
+  return Dir.FreeMB() >= SizeMB;
+}
diff --git a/videodir.h b/videodir.h
new file mode 100644
index 00000000..7ce15314
--- /dev/null
+++ b/videodir.h
@@ -0,0 +1,21 @@
+/*
+ * videodir.h: Functions to maintain a distributed video directory
+ *
+ * See the main source file 'vdr.c' for copyright information and
+ * how to reach the author.
+ *
+ * $Id: videodir.h 1.1 2000/07/29 14:08:27 kls Exp $
+ */
+
+#ifndef __VIDEODIR_H
+#define __VIDEODIR_H
+
+extern const char *VideoDirectory;
+
+int OpenVideoFile(const char *FileName, int Flags);
+int CloseVideoFile(int FileHandle);
+bool RenameVideoFile(const char *OldName, const char *NewName);
+bool RemoveVideoFile(const char *FileName);
+bool VideoFileSpaceAvailable(unsigned int SizeMB);
+
+#endif //__VIDEODIR_H