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don't spin writer daemon when < /dev/null (#25170)

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Dylan Simon 2021-08-03 00:39:38 -04:00 committed by GitHub
parent 2dd2a5b167
commit 507d3c841c
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1 changed files with 6 additions and 4 deletions
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4
lib/spack/llnl/util/tty/log.py
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@ -533,13 +533,15 @@ def __enter__(self):
# Sets a daemon that writes to file what it reads from a pipe # Sets a daemon that writes to file what it reads from a pipe
try: try:
# need to pass this b/c multiprocessing closes stdin in child. # need to pass this b/c multiprocessing closes stdin in child.
input_multiprocess_fd = None
try: try:
if sys.stdin.isatty():
input_multiprocess_fd = MultiProcessFd( input_multiprocess_fd = MultiProcessFd(
os.dup(sys.stdin.fileno()) os.dup(sys.stdin.fileno())
) )
except BaseException: except BaseException:
# just don't forward input if this fails # just don't forward input if this fails
input_multiprocess_fd = None pass
with replace_environment(self.env): with replace_environment(self.env):
self.process = multiprocessing.Process( self.process = multiprocessing.Process(