def redircmd(self, infd, outfd, errfd, args, wait=True):
"""
Execute a command on a node with standard input, output, and
error redirected according to the given file descriptors.
:param infd: stdin file descriptor
:param outfd: stdout file descriptor
:param errfd: stderr file descriptor
:param list[str]|str args: command arguments
:param bool wait: wait flag
:return: command status
:rtype: int
"""
self._verify_connection()
# run command, return process when not waiting
args = utils.split_args(args)
cmd = self._cmd_args() + args
logging.debug("redircmd: %s", cmd)
p = Popen(cmd, stdin=infd, stdout=outfd, stderr=errfd)
if not wait:
return p
# wait for and return exit status
status = p.wait()
if status:
logging.warning("cmd exited with status %s: %s", status, args)
return status
def icmd(self, args):
"""
Execute an icmd against a node.
:param list[str]|str args: command arguments
:return: command result
:rtype: int
"""
args = utils.split_args(args)
return os.spawnlp(os.P_WAIT, constants.VCMD_BIN, constants.VCMD_BIN, "-c", self.ctrlchnlname, "--", *args)
def popen(self, args):
"""
Execute a popen command against the node.
:param list[str]|str args: command arguments
:return: popen object, stdin, stdout, and stderr
:rtype: tuple
"""
self._verify_connection()
args = utils.split_args(args)
cmd = self._cmd_args() + args
logging.debug("popen: %s", cmd)
p = Popen(cmd, stdout=PIPE, stderr=PIPE, stdin=PIPE)
return p, p.stdin, p.stdout, p.stderr
def cmd(self, args, wait=True):
"""
Execute a command on a node and return the status (return code).
:param list[str]|str args: command arguments
:param bool wait: wait for command to end or not
:return: command status
:rtype: int
"""
self._verify_connection()
args = utils.split_args(args)
# run command, return process when not waiting
cmd = self._cmd_args() + args
logging.debug("cmd wait(%s): %s", wait, cmd)
p = Popen(cmd, stdout=PIPE, stderr=PIPE)
if not wait:
return 0
# wait for and return exit status
return p.wait()
