mirror of https://github.com/tLDP/python-tldp
81 lines
2.3 KiB
Python
81 lines
2.3 KiB
Python
#! /usr/bin/python
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from __future__ import absolute_import, division, print_function
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import os
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import io
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import sys
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import subprocess
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from tempfile import mkstemp
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import logging
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def getLogger(**opts):
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level = opts.get('level', logging.DEBUG)
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logging.basicConfig(stream=sys.stderr, level=level)
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logger = logging.getLogger()
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return logger
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logger = getLogger()
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def execute(cmd, stdin=None, stdout=None, stderr=None,
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logdir=None, env=os.environ):
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prefix = os.path.basename(cmd[0]) + '.' + str(os.getpid()) + '-'
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if logdir is None:
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raise Exception("Missing, required parameter: logdir.")
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assert os.path.isdir(logdir)
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# -- not remapping STDIN, because that doesn't make sense here
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if stdout is None:
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stdout, stdoutname = mkstemp(prefix=prefix, suffix='.stdout',
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dir=logdir)
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if stderr is None:
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stderr, stderrname = mkstemp(prefix=prefix, suffix='.stderr',
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dir=logdir)
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logger.debug("About to execute: %r", cmd)
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proc = subprocess.Popen(cmd, shell=False, close_fds=True,
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stdin=stdin, stdout=stdout, stderr=stderr,
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env=env, preexec_fn=os.setsid)
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result = proc.wait()
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if result != 0:
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logger.warning("Return code (%s) for process: %r", result, cmd)
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logger.warning("Find STDOUT/STDERR in %s/%s", logdir, prefix)
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return result
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def is_executable(fpath):
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return os.path.isfile(fpath) and os.access(fpath, os.X_OK)
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def which(program):
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'''return None or the full path to an executable (respecting $PATH)
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http://stackoverflow.com/questions/377017/test-if-executable-exists-in-python/377028#377028
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'''
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fpath, fname = os.path.split(program)
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if fpath and is_executable(program):
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return program
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else:
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for path in os.environ["PATH"].split(os.pathsep):
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path = path.strip('"')
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sut = os.path.join(path, program)
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if is_executable(sut):
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return sut
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return None
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def makefh(thing):
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if isinstance(thing, io.IOBase):
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f = thing
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elif isinstance(thing, str) and os.path.isfile(thing):
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f = open(thing)
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else:
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raise TypeError("Cannot make file from %s of %r" %
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(type(thing), thing,))
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return f
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#
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# -- end of file
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