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Refactoring: common stdin </dev/null.

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Brett Randall 2022-01-30 17:58:52 +11:00
parent 835a4fc420
commit eedc3a38b6
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GPG Key ID: 50EF8B0B7C04B29D
1 changed files with 16 additions and 23 deletions
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39
gunicorn/util.py
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@ -472,6 +472,19 @@ def daemonize(enable_stdio_inheritance=False):
os.umask(0o22) os.umask(0o22)
# Always redirect stdin to /dev/null as we would
# never expect to need to read interactive input.
os.close(0)
fd_null = os.open(REDIRECT_TO, os.O_RDWR)
# PEP 446, make fd for /dev/null inheritable
os.set_inheritable(fd_null, True)
# expect fd_null to be always 0 here, but in-case not ...
if fd_null != 0:
os.dup2(fd_null, 0)
# In both the following any file descriptors above stdin # In both the following any file descriptors above stdin
# stdout and stderr are left untouched. The inheritance # stdout and stderr are left untouched. The inheritance
# option simply allows one to have output go to a file # option simply allows one to have output go to a file
@ -479,37 +492,17 @@ def daemonize(enable_stdio_inheritance=False):
# to use --error-log option. # to use --error-log option.
if not enable_stdio_inheritance: if not enable_stdio_inheritance:
# Remap all of stdin, stdout and stderr on to # Remap remaining fds stdout and stderr on to
# /dev/null. The expectation is that users have # /dev/null. The expectation is that users have
# specified the --error-log option. # specified the --error-log option.
closerange(0, 3) # 1/stdout, 2/stderr - 0/stdin already done above
closerange(1, 3)
fd_null = os.open(REDIRECT_TO, os.O_RDWR)
# PEP 446, make fd for /dev/null inheritable
os.set_inheritable(fd_null, True)
# expect fd_null to be always 0 here, but in-case not ...
if fd_null != 0:
os.dup2(fd_null, 0)
os.dup2(fd_null, 1) os.dup2(fd_null, 1)
os.dup2(fd_null, 2) os.dup2(fd_null, 2)
else: else:
# Always redirect stdin to /dev/null as we would
# never expect to need to read interactive input.
os.close(0)
fd_null = os.open(REDIRECT_TO, os.O_RDWR)
# PEP 446, make fd for /dev/null inheritable
os.set_inheritable(fd_null, True)
# expect fd_null to be always 0 here, but in-case not ...
if fd_null != 0:
os.dup2(fd_null, 0)
# If stdout and stderr are still connected to # If stdout and stderr are still connected to
# their original file descriptors we check to see # their original file descriptors we check to see
# if they are associated with terminal devices. # if they are associated with terminal devices.