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 fsDeleteFile(self, filename):
"""Delete file with specified filename.
First permanent file with matching name will be deleted.
Not an error if file is not found.
Adjacent empty files will be consolidated after deletion."""
fnRad50 = rad50.filenameToRad50(filename)
for idx, de in enumerate(self.fsFileList):
if fnRad50 == de.deName:
de.deStatus = deEMPTY
self.fsFileList[idx] = de
self._fsConsolidateEmpty()
def fsSaveFile(self, rtFilename, hostFilename=""):
"""Save permanent file with specified name to host filesystem.
If hostFilename is not specified, RT-11 filename will be used
and file will be saved in current directory. If host filename
is specified, it may include a relative or absolute path."""
r50Name = rad50.filenameToRad50(rtFilename)
rtFilename = rad50.rad50ToFilename(r50Name)
savedFile = False
for de in self.fsFileList:
if (de.deStatus & deEPERM) and (de.deName == r50Name):
savedFile = True
de.deSaveFile(hostFilename)
break
rt11util.assertWarn(savedFile, "Could not find file " + rtFilename)
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)
