def fsSqueeze(self):
"""Squeeze the filesystem.
Removes tentative files and consolidates unallocated blocks
in single empty file at end of filesystem."""
oldFileList = self.fsFileList
self.fsFileList = []
dataBlock = self.fsDataStart
for de in oldFileList:
if de.deStatus & deEPERM:
de.deStart = dataBlock
dataBlock += de.deLength
self.fsFileList.append(de)
remainingBlocks = (self.fsDataStart + self.fsDataBlocks) - dataBlock
if remainingBlocks > 0:
eb = dirEntry(
name=rad50.filenameToRad50(" EMPTY.FIL"),
length=remainingBlocks,
start=dataBlock,
status=deEMPTY,
date=rt11util.todayWord(self.fsThisYear),
)
eb.deEmptyData()
self.fsFileList.append(eb)
self.fsValidate()
def __init__(
self,
blocks=512,
dirSegs=1,
extraWords=0,
resBlocks=0,
sysVersion="V3A",
volId="RT11A",
ownerName="",
sysId="DECRT11A",
bootBlocks=["\000" * rt11util.rtBlockSize] * rtNumBootBlocks,
thisYear=None,
):
"""fileSystem class constructor."""
self.fsSize = blocks
self.fsResBlocks = resBlocks
self.fsNumDirSegs = dirSegs
self.fsExtraWords = extraWords
self.fsDirEntSize = rtDirEntSize + self.fsExtraWords
self.fsDirEntPerSeg = (rtDirSegSize - rtDirSegHdrSize) / self.fsDirEntSize
self.fsSysVersion = rad50.ascToRad50(sysVersion)[0]
self.fsVolumeId = volId.ljust(12)
self.fsOwnerName = ownerName.ljust(12)
self.fsSystemId = sysId.ljust(12)
self.fsDataStart = self.fsFirstDirSeg + (self.fsNumDirSegs * 2)
self.fsBootBlocks = bootBlocks
self.fsThisYear = thisYear
self.fsDataBlocks = self.fsSize - self.fsDataStart - self.fsResBlocks
if len(self.fsVolumeId) > 12:
self.fsVolumeId = self.fsVolumeId[0:12]
if len(self.fsOwnerName) > 12:
self.fsOwnerName = self.fsOwnerName[0:12]
if len(self.fsSystemId) > 12:
self.fsSystemId = self.fsSystemId[0:12]
dirEnt = dirEntry(
name=rad50.filenameToRad50(" EMPTY.FIL"),
length=self.fsSize - (self.fsDataStart + self.fsResBlocks),
start=self.fsDataStart,
status=deEMPTY,
date=rt11util.todayWord(self.fsThisYear),
)
dirEnt.deEmptyData()
self.fsFileList = [dirEnt]
self.fsValidate()
def __init__(self, name, length, start, status=deEPERM, jobchan=0, date=None, extra=[]):
"""dirEntry class constructor.
Does not allocate data blocks. Use fsetData() or deEmptyData()
to initialize data blocks.
If date is negative, today's date will be substituted."""
self.deStatus = status
self.deName = name
self.deLength = length
self.deStart = start
self.deJobChan = jobchan
self.deExtra = extra
if len(self.deName) > 3:
self.deName = self.deName[0:3]
if date is not None:
self.deDate = date
else:
date = rt11util.todayWord()
def fsAddFile(self, hostFilename, rtFilename="", dateWord=None, statusWord=deEPERM):
"""Read file and add it to the RT-11 filesystem.
hostFilename refers to a local file on the host's filesystem.
If rtFilename is not specified, filename on RT-11 filesystem will
be derived from hostFilename.
If host file size is not a multiple of rtBlockSize, it will be
padded with zeroes.
Negative dateWord will be replaced with today's date."""
# Use host filename if RT-11 name not specified
if rtFilename == "":
rtFilename = hostFilename
rad50Filename = rad50.filenameToRad50(rtFilename)
rtFilename = rad50.rad50ToFilename(rad50Filename)
if dateWord is None:
dateWord = rt11util.todayWord(self.fsThisYear)
# Read host file, pad if necessary
f = open(hostFilename, "rb")
buf = f.read()
f.close
pad = rt11util.rtBlockSize - (len(buf) % rt11util.rtBlockSize)
if pad != 512:
buf += "\000" * pad
fileLen = len(buf) / rt11util.rtBlockSize
# Delete existing file with same name
self.fsDeleteFile(rtFilename)
# Search for first empty block large enough to hold file
addedFile = False
for idx, de in enumerate(self.fsFileList):
if (de.deStatus & deEMPTY) and (de.deLength >= fileLen):
addedFile = True
# If empty block is larger than new file, split it.
if de.deLength > fileLen:
ede = dirEntry(
name=rad50.filenameToRad50(" EMPTY.FIL"),
length=de.deLength - fileLen,
start=de.deStart + fileLen,
status=deEMPTY,
date=rt11util.todayWord(self.fsThisYear),
)
ede.deEmptyData()
self.fsFileList.insert(idx + 1, ede)
de.deStatus = statusWord
de.deName = rad50Filename
de.deLength = fileLen
de.deJobChan = 0
de.deDate = dateWord
de.deSetData(buf)
self.fsFileList[idx] = de
break
rt11util.assertError(addedFile, "Could not find space for " + rtFilename)
