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/*
* recording.h: Recording file handling
*
* See the main source file 'osm.c' for copyright information and
* how to reach the author.
*
* $Id: recording.c 1.2 2000/04/15 13:29:02 kls Exp $
*/
#define _GNU_SOURCE
#include "recording.h"
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include "interface.h"
#include "tools.h"
#define RECEXT ".rec"
#define DELEXT ".del"
#define DATAFORMAT "%4d-%02d-%02d.%02d:%02d.%02d.%02d" RECEXT
#define NAMEFORMAT "%s/%s/" DATAFORMAT
#define FINDCMD "find %s -type d -name '%s'"
#define DFCMD "df -m %s"
#define MINDISKSPACE 1024 // MB
#define DISKCHECKDELTA 300 // seconds between checks for free disk space
const char *BaseDir = "/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, BaseDir);
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
// a file, or mark a file for removal ("delete" it), so that
// it will get removed during the next call.
static time_t LastFreeDiskCheck = 0;
if (time(NULL) - LastFreeDiskCheck > DISKCHECKDELTA) {
LastFreeDiskCheck = time(NULL);
if (DvbApi.Recording() && LowDiskSpace()) {
// Remove the oldest file that has been "deleted":
cRecordings Recordings;
if (Recordings.Load(true)) {
cRecording *r = Recordings.First();
cRecording *r0 = r;
while (r) {
if (r->start < r0->start)
r0 = r;
r = Recordings.Next(r);
}
if (r0 && r0->Remove())
return;
}
// No "deleted" files to remove, so let's see if we can delete a recording:
if (Recordings.Load(false)) {
cRecording *r = Recordings.First();
cRecording *r0 = NULL;
while (r) {
if ((time(NULL) - r->start) / SECSINDAY > r->lifetime) {
if (r0) {
if (r->priority < r0->priority)
r0 = r;
}
else
r0 = r;
}
r = Recordings.Next(r);
}
if (r0 && r0->Delete())
return;
}
// Unable to free disk space, but there's nothing we can do about that...
esyslog(LOG_ERR, "low disk space, but no recordings to delete");
}
}
}
// --- cRecording ------------------------------------------------------------
cRecording::cRecording(const char *Name, time_t Start, int Priority, int LifeTime)
{
fileName = NULL;
name = strdup(Name);
start = Start;
priority = Priority;
lifetime = LifeTime;
}
cRecording::cRecording(cTimer *Timer)
{
fileName = NULL;
name = strdup(Timer->file);
start = Timer->StartTime();
priority = Timer->priority;
lifetime = Timer->lifetime;
}
cRecording::cRecording(const char *FileName)
{
fileName = strdup(FileName);
FileName += strlen(BaseDir) + 1;
char *p = strrchr(FileName, '/');
name = NULL;
if (p) {
time_t now = time(NULL);
struct tm t = *localtime(&now); // this initializes the time zone in 't'
if (7 == sscanf(p + 1, DATAFORMAT, &t.tm_year, &t.tm_mon, &t.tm_mday, &t.tm_hour, &t.tm_min, &priority, &lifetime)) {
t.tm_year -= 1900;
t.tm_mon--;
t.tm_sec = 0;
start = mktime(&t);
name = new char[p - FileName + 1];
strncpy(name, FileName, p - FileName);
name[p - FileName] = 0;
}
}
}
cRecording::~cRecording()
{
delete fileName;
delete name;
}
const char *cRecording::FileName(void)
{
if (!fileName) {
struct tm *t = localtime(&start);
asprintf(&fileName, NAMEFORMAT, BaseDir, name, t->tm_year + 1900, t->tm_mon + 1, t->tm_mday, t->tm_hour, t->tm_min, priority, lifetime);
}
return fileName;
}
bool cRecording::Delete(void)
{
bool result = true;
char *NewName = strdup(FileName());
char *ext = strrchr(NewName, '.');
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;
}
}
delete NewName;
return result;
}
bool cRecording::Remove(void)
{
isyslog(LOG_INFO, "removing recording %s", FileName());
return RemoveFileOrDir(FileName());
}
bool cRecording::Record(void)
{
return DvbApi.StartRecord(FileName());
}
bool cRecording::Play(void)
{
return DvbApi.StartReplay(FileName());
}
void cRecording::Stop(void)
{
DvbApi.StopRecord();
}
// --- cRecordings -----------------------------------------------------------
bool cRecordings::Load(bool Deleted)
{
Clear();
bool result = false;
char *cmd = NULL;
asprintf(&cmd, FINDCMD, BaseDir, Deleted ? "*" DELEXT : "*" RECEXT);
FILE *p = popen(cmd, "r");
if (p) {
char *s;
while ((s = readline(p)) != NULL) {
cRecording *r = new cRecording(s);
if (r->name)
Add(r);
else
delete r;
}
pclose(p);
result = Count() > 0;
}
else
Interface.Error("Error while opening pipe!");
delete cmd;
return result;
}
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