def bkgdProcess(commandArr, outfile=None, errfile='stdout', returnOnErr=False):
"""bkgdProcess(commandArr, [outfile] [, errfile]) - Run a process in background
with optional redirection of standard output to a file, and of standard error
to a separate file or to standard out by default.
"""
try:
# If subprocess is allowed, open the files if any
if useSubprocess:
outf = None
errf = None
errToFile = False
if errfile == 'stdout':
errf = STDOUT
if outfile:
action = 'Opening ' + outfile + ' for output'
outf = open(outfile, 'w')
errToFile = errfile == 'stdout'
if errfile and errfile != 'stdout':
action = 'Opening ' + errfile + ' for output'
errf = open(errfile, 'w')
errToFile = True
# Use detached flag on Windows, although it may not be needed
# In fact, unless stderr is going to a file it keeps it from running there
action = 'Starting background process ' + commandArr[0]
if sys.platform.find('win32') >= 0 and errToFile:
DETACHED_PROCESS = 0x00000008
Popen(commandArr,
shell=False,
stdout=outf,
stderr=errf,
creationflags=DETACHED_PROCESS)
else:
Popen(commandArr, shell=False, stdout=outf, stderr=errf)
return None
# Otherwise use system call: wrap all args in quotes and add the redirects
comstr = commandArr[0]
action = 'Starting background process ' + commandArr[0]
for i in range(1, len(commandArr)):
comstr += ' "' + commandArr[i] + '"'
if outfile:
comstr += ' > "' + outfile + '"'
if errfile == 'stdout':
comstr += ' 2>&1'
elif errfile:
comstr += ' 2> "' + errfile + '"'
comstr += ' &'
# The return value is not useful when it fails to run
os.system(comstr)
return None
except Exception:
errString = action + " - " + str(sys.exc_info()[1])
if returnOnErr:
return errString
exitError(errString)
def bkgdProcess(commandArr, outfile=None, errfile='stdout', returnOnErr = False):
"""bkgdProcess(commandArr, [outfile] [, errfile]) - Run a process in background
with optional redirection of standard output to a file, and of standard error
to a separate file or to standard out by default.
"""
try:
# If subprocess is allowed, open the files if any
if useSubprocess:
outf = None
errf = None
errToFile = False
if errfile == 'stdout':
errf = STDOUT
if outfile:
action = 'Opening ' + outfile + ' for output'
outf = open(outfile, 'w')
errToFile = errfile == 'stdout'
if errfile and errfile != 'stdout':
action = 'Opening ' + errfile + ' for output'
errf = open(errfile, 'w')
errToFile = True
# Use detached flag on Windows, although it may not be needed
# In fact, unless stderr is going to a file it keeps it from running there
action = 'Starting background process ' + commandArr[0]
if sys.platform.find('win32') >= 0 and errToFile:
DETACHED_PROCESS = 0x00000008
Popen(commandArr, shell=False, stdout=outf, stderr=errf,
creationflags=DETACHED_PROCESS)
else:
Popen(commandArr, shell=False, stdout=outf, stderr=errf)
return None
# Otherwise use system call: wrap all args in quotes and add the redirects
comstr = commandArr[0]
action = 'Starting background process ' + commandArr[0]
for i in range(1, len(commandArr)):
comstr += ' "' + commandArr[i] + '"'
if outfile:
comstr += ' > "' + outfile + '"'
if errfile == 'stdout':
comstr += ' 2>&1'
elif errfile:
comstr += ' 2> "' + errfile + '"'
comstr += ' &'
# The return value is not useful when it fails to run
os.system(comstr)
return None
except Exception:
errString = action + " - " + str(sys.exc_info()[1])
if returnOnErr:
return errString
exitError(errString)
def readTextFile(filename, descrip=None, returnOnErr=False, maxLines=None):
"""readTextFile(filename[ , descrip]) - read in text file, strip endings
Reads in the text file in <filename> if this is a string, or reads from it
as an open file object if not, strips the line endings and blanks
from the end of each line, and returns a list of strings. If maxLines is
passed, then it reads up to that number of lines. Exits with
exitError on an error opening or reading the file, and adds the optional
description in <descrip> to the error message. Or, if returnOnErr is True,
it returns the error string itself.
"""
if not descrip:
descrip = " "
try:
errString = "Opening"
if isinstance(filename, str):
textfile = open(filename, 'r')
else:
textfile = filename
errString = "Reading"
if maxLines:
lines = []
for ind in range(maxLines):
line = textfile.readline()
if not line:
break
lines.append(line)
else:
lines = textfile.readlines()
except IOError:
errString = fmtstr("{} {} {}: {}", errString, descrip, filename, \
str(sys.exc_info()[1]))
if returnOnErr:
try:
textfile.close()
except:
pass
return errString
exitError(errString)
textfile.close()
for i in range(len(lines)):
lines[i] = lines[i].rstrip(' \t\r\n')
return lines
def readTextFile(filename, descrip = None, returnOnErr = False, maxLines = None):
"""readTextFile(filename[ , descrip]) - read in text file, strip endings
Reads in the text file in <filename> if this is a string, or reads from it
as an open file object if not, strips the line endings and blanks
from the end of each line, and returns a list of strings. If maxLines is
passed, then it reads up to that number of lines. Exits with
exitError on an error opening or reading the file, and adds the optional
description in <descrip> to the error message. Or, if returnOnErr is True,
it returns the error string itself.
"""
if not descrip:
descrip = " "
try:
errString = "Opening"
if isinstance(filename, str):
textfile = open(filename, 'r')
else:
textfile = filename
errString = "Reading"
if maxLines:
lines = []
for ind in range(maxLines):
line = textfile.readline()
if not line:
break
lines.append(line)
else:
lines = textfile.readlines()
except IOError:
errString = fmtstr("{} {} {}: {}", errString, descrip, filename, \
str(sys.exc_info()[1]))
if returnOnErr:
try:
textfile.close()
except:
pass
return errString
exitError(errString)
textfile.close()
for i in range(len(lines)):
lines[i] = lines[i].rstrip(' \t\r\n')
return lines
def completeAndCheckComFile(comfile):
"""completeAndCheckComFile(comfile) - return complete com file name and root
Given a com file file name that can be file, file., or file.com, compose
the complete name and the root name and exit with error if file does not
exist.
"""
if not comfile:
exitError("A command file must be entered")
if comfile.endswith('.com'):
rootname = comfile[0:len(comfile) - 4]
elif comfile.endswith('.'):
rootname = comfile.rstrip('.')
else:
rootname = comfile
comfile = rootname + '.com'
if not os.path.exists(comfile):
exitError("Command file " + comfile + " does not exist")
return (comfile, rootname)
def completeAndCheckComFile(comfile):
"""completeAndCheckComFile(comfile) - return complete com file name and root
Given a com file file name that can be file, file., or file.com, compose
the complete name and the root name and exit with error if file does not
exist.
"""
if not comfile:
exitError("A command file must be entered")
if comfile.endswith('.com'):
rootname = comfile[0 : len(comfile) - 4]
elif comfile.endswith('.'):
rootname = comfile.rstrip('.')
else:
rootname = comfile
comfile = rootname + '.com'
if not os.path.exists(comfile):
exitError("Command file " + comfile + " does not exist")
return (comfile, rootname)
def writeTextFile(filename, strings, returnOnErr = False):
"""writeTextFile(filename, strings) - write set of strings to a text file
Opens the file <filename> and writes the set of strings in the list
<strings>, adding a line ending to each. Exits with exitError upon error,
or returns an error string if returnOnErr is True.
"""
try:
action = 'Opening'
comf = open(filename, 'w')
action = 'Writing to'
for line in strings:
prnstr(line, file=comf)
comf.close()
except IOError:
errString = action + " file: " + filename + " - " + str(sys.exc_info()[1])
if returnOnErr:
try:
comf.close()
except:
pass
return errString
exitError(errString)
def convertToInteger(valstr, description):
try:
return int(valstr)
except ValueError:
exitError('Converting ' + description + ' (' + valstr + ') to integer')
def convertToInteger(valstr, description):
try:
return int(valstr)
except ValueError:
exitError('Converting ' + description + ' (' + valstr + ') to integer')
