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Prevent pre-forked process to access the standard input of their parents

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This commit is contained in:
Waf Project 2024-11-09 16:38:50 +08:00
parent 7af93bc8a3
commit 22738deb0e
1 changed files with 8 additions and 11 deletions
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19
waflib/Utils.py
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@ -903,7 +903,7 @@ def get_process():
except IndexError:
filepath = os.path.dirname(os.path.abspath(__file__)) + os.sep + 'processor.py'
cmd = [sys.executable, '-c', readf(filepath)]
return subprocess.Popen(cmd, stdout=subprocess.PIPE, stdin=subprocess.PIPE, bufsize=0, close_fds=not is_win32)
return subprocess.Popen(cmd, stdout=subprocess.PIPE, stdin=subprocess.PIPE)
def run_prefork_process(cmd, kwargs, cargs):
"""
@ -911,6 +911,11 @@ def run_prefork_process(cmd, kwargs, cargs):
"""
if not kwargs.get('env'):
kwargs['env'] = dict(os.environ)
if hasattr(subprocess, 'DEVNULL') and 'stdin' not in kwargs:
# prevent accidental communication errors
kwargs['stdin'] = subprocess.DEVNULL
try:
obj = base64.b64encode(cPickle.dumps([cmd, kwargs, cargs]))
except (TypeError, AttributeError):
@ -1011,7 +1016,7 @@ def run_process(cmd, kwargs, cargs={}):
or falling back to subprocess.Popen. See :py:func:`waflib.Utils.run_prefork_process`
and :py:func:`waflib.Utils.run_regular_process`
"""
if kwargs.get('stdout') and kwargs.get('stderr'):
if kwargs.get('stdout') and kwargs.get('stderr') and 'stdin' not in kwargs:
return run_prefork_process(cmd, kwargs, cargs)
else:
return run_regular_process(cmd, kwargs, cargs)
@ -1051,14 +1056,6 @@ def atexit_pool():
if (sys.hexversion<0x207000f and not is_win32) or sys.hexversion>=0x306000f:
atexit.register(atexit_pool)
try:
# proc.stdin.readline errors
import sysconfig
bad_stdin = 'mingw' in sysconfig.get_platform()
except ImportError:
bad_stdin = True
if bad_stdin or os.environ.get('WAF_NO_PREFORK') or sys.platform == 'cli' or not sys.executable:
if os.environ.get('WAF_NO_PREFORK') or sys.platform == 'cli' or not sys.executable or not hasattr(subprocess, 'DEVNULL'):
run_process = run_regular_process
get_process = alloc_process_pool = nada