/*
* SetWALFileNameForCleanup()
*
* Set the earliest WAL filename that we want to keep on the archive
* and decide whether we need_cleanup
*/
static bool
SetWALFileNameForCleanup(void)
{
uint32 tli = 1,
log = 0,
seg = 0;
uint32 log_diff = 0,
seg_diff = 0;
bool cleanup = false;
int max_segments_per_logfile = (0xFFFFFFFF / WalSegSz);
if (restartWALFileName)
{
/*
* Don't do cleanup if the restartWALFileName provided is later than
* the xlog file requested. This is an error and we must not remove
* these files from archive. This shouldn't happen, but better safe
* than sorry.
*/
if (strcmp(restartWALFileName, nextWALFileName) > 0)
return false;
strlcpy(exclusiveCleanupFileName, restartWALFileName, sizeof(exclusiveCleanupFileName));
return true;
}
if (keepfiles > 0)
{
sscanf(nextWALFileName, "%08X%08X%08X", &tli, &log, &seg);
if (tli > 0 && seg > 0)
{
log_diff = keepfiles / max_segments_per_logfile;
seg_diff = keepfiles % max_segments_per_logfile;
if (seg_diff > seg)
{
log_diff++;
seg = max_segments_per_logfile - (seg_diff - seg);
}
else
seg -= seg_diff;
if (log >= log_diff)
{
log -= log_diff;
cleanup = true;
}
else
{
log = 0;
seg = 0;
}
}
}
XLogFileNameById(exclusiveCleanupFileName, tli, log, seg);
return cleanup;
}
/*
* SetWALFileNameForCleanup()
*
* Set the earliest WAL filename that we want to keep on the archive
* and decide whether we need_cleanup
*/
static void
SetWALFileNameForCleanup(void)
{
bool fnameOK = false;
TrimExtension(restartWALFileName, additional_ext);
/*
* If restartWALFileName is a WAL file name then just use it directly. If
* restartWALFileName is a .backup filename, make sure we use the prefix
* of the filename, otherwise we will remove wrong files since
* 000000010000000000000010.00000020.backup is after
* 000000010000000000000010.
*/
if (IsXLogFileName(restartWALFileName))
{
strcpy(exclusiveCleanupFileName, restartWALFileName);
fnameOK = true;
}
else if (IsBackupHistoryFileName(restartWALFileName))
{
int args;
uint32 tli = 1,
log = 0,
seg = 0,
offset = 0;
args = sscanf(restartWALFileName, "%08X%08X%08X.%08X.backup", &tli, &log, &seg, &offset);
if (args == 4)
{
fnameOK = true;
/*
* Use just the prefix of the filename, ignore everything after
* first period
*/
XLogFileNameById(exclusiveCleanupFileName, tli, log, seg);
}
}
if (!fnameOK)
{
fprintf(stderr, "%s: invalid filename input\n", progname);
fprintf(stderr, "Try \"%s --help\" for more information.\n", progname);
exit(2);
}
}
