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NodeUtils: do not pass stdin to group upcalls #581

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merged 1 commit into from
Feb 23, 2025
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NodeUtils: do not pass stdin to group upcalls #581

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11 changes: 9 additions & 2 deletions lib/ClusterShell/NodeUtils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -46,6 +46,13 @@
from string import Template
from subprocess import Popen, PIPE

# compat with python 2.7, import directly above for 3.x
try:
from subprocess import DEVNULL
except ImportError:
DEVNULL = open(os.devnull, 'r')

# compat with python 2.7, use str directly in 3.x
try:
basestring
except NameError:
Expand Down Expand Up @@ -202,8 +209,8 @@ def _upcall_read(self, cmdtpl, args=dict()):
"""
cmdline = Template(self.upcalls[cmdtpl]).safe_substitute(args)
self.logger.debug("EXEC '%s'", cmdline)
proc = Popen(cmdline, stdout=PIPE, shell=True, cwd=self.cfgdir,
universal_newlines=True)
proc = Popen(cmdline, stdin=DEVNULL, stdout=PIPE, shell=True,
cwd=self.cfgdir, universal_newlines=True)
output = proc.communicate()[0].strip()
self.logger.debug("READ '%s'", output)
if proc.returncode != 0:
Expand Down
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