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Merged revisions 86223-86224,86226,86234 via svnmerge from 

svn+ssh://pythondev@svn.python.org/python/branches/py3k

........
  r86223 | eric.araujo | 2010-11-06 00:51:56 +0100 (sam., 06 nov. 2010) | 2 lines

  Always close files in distutils code and tests (#10252).
........
  r86224 | eric.araujo | 2010-11-06 00:58:34 +0100 (sam., 06 nov. 2010) | 2 lines

  Add missing entry for r86223.
........
  r86226 | eric.araujo | 2010-11-06 00:59:32 +0100 (sam., 06 nov. 2010) | 2 lines

  Of course, I forgot one file in r86223.
........
  r86234 | eric.araujo | 2010-11-06 03:10:32 +0100 (sam., 06 nov. 2010) | 2 lines

  Also close file descriptors from os.popen and subprocess.Popen
........
This commit is contained in:
Éric Araujo 2010-11-06 04:06:18 +00:00
parent 860c05d9f7
commit d1feff70a3
27 changed files with 297 additions and 194 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
Lib/distutils/ccompiler.py
View File

@ -794,14 +794,16 @@ class CCompiler:
library_dirs = []
fd, fname = tempfile.mkstemp(".c", funcname, text=True)
f = os.fdopen(fd, "w")
for incl in includes:
f.write("""#include "%s"\n""" % incl)
f.write("""\
try:
for incl in includes:
f.write("""#include "%s"\n""" % incl)
f.write("""\
main (int argc, char **argv) {
%s();
}
""" % funcname)
f.close()
finally:
f.close()
try:
objects = self.compile([fname], include_dirs=include_dirs)
except CompileError:

34
Lib/distutils/command/bdist_rpm.py
View File

@ -355,22 +355,26 @@ class bdist_rpm (Command):
src_rpm, non_src_rpm, spec_path)
out = os.popen(q_cmd)
binary_rpms = []
source_rpm = None
while 1:
line = out.readline()
if not line:
break
l = string.split(string.strip(line))
assert(len(l) == 2)
binary_rpms.append(l[1])
# The source rpm is named after the first entry in the spec file
if source_rpm is None:
source_rpm = l[0]
try:
binary_rpms = []
source_rpm = None
while 1:
line = out.readline()
if not line:
break
l = string.split(string.strip(line))
assert(len(l) == 2)
binary_rpms.append(l[1])
# The source rpm is named after the first entry in the spec file
if source_rpm is None:
source_rpm = l[0]
status = out.close()
if status:
raise DistutilsExecError("Failed to execute: %s" % repr(q_cmd))
status = out.close()
if status:
raise DistutilsExecError("Failed to execute: %s" % repr(q_cmd))
finally:
out.close()
self.spawn(rpm_cmd)

6
Lib/distutils/command/bdist_wininst.py
View File

@ -356,5 +356,9 @@ class bdist_wininst (Command):
sfix = ''
filename = os.path.join(directory, "wininst-%.1f%s.exe" % (bv, sfix))
return open(filename, "rb").read()
f = open(filename, "rb")
try:
return f.read()
finally:
f.close()
# class bdist_wininst

6
Lib/distutils/command/upload.py
View File

@ -79,7 +79,11 @@ class upload(PyPIRCCommand):
# Fill in the data - send all the meta-data in case we need to
# register a new release
content = open(filename,'rb').read()
f = open(filename,'rb')
try:
content = f.read()
finally:
f.close()
meta = self.distribution.metadata
data = {
# action

6
Lib/distutils/core.py
View File

@ -216,7 +216,11 @@ def run_setup(script_name, script_args=None, stop_after="run"):
sys.argv[0] = script_name
if script_args is not None:
sys.argv[1:] = script_args
exec open(script_name, 'r').read() in g, l
f = open(script_name)
try:
exec f.read() in g, l
finally:
f.close()
finally:
sys.argv = save_argv
_setup_stop_after = None

6
Lib/distutils/cygwinccompiler.py
View File

@ -382,8 +382,10 @@ def check_config_h():
# It would probably better to read single lines to search.
# But we do this only once, and it is fast enough
f = open(fn)
s = f.read()
f.close()
try:
s = f.read()
finally:
f.close()
except IOError, exc:
# if we can't read this file, we cannot say it is wrong

8
Lib/distutils/dist.py
View File

@ -1101,9 +1101,11 @@ class DistributionMetadata:
def write_pkg_info(self, base_dir):
"""Write the PKG-INFO file into the release tree.
"""
pkg_info = open( os.path.join(base_dir, 'PKG-INFO'), 'w')
self.write_pkg_file(pkg_info)
pkg_info.close()
pkg_info = open(os.path.join(base_dir, 'PKG-INFO'), 'w')
try:
self.write_pkg_file(pkg_info)
finally:
pkg_info.close()
def write_pkg_file(self, file):
"""Write the PKG-INFO format data to a file object.

12
Lib/distutils/emxccompiler.py
View File

@ -272,8 +272,10 @@ def check_config_h():
# It would probably better to read single lines to search.
# But we do this only once, and it is fast enough
f = open(fn)
s = f.read()
f.close()
try:
s = f.read()
finally:
f.close()
except IOError, exc:
# if we can't read this file, we cannot say it is wrong
@ -300,8 +302,10 @@ def get_versions():
gcc_exe = find_executable('gcc')
if gcc_exe:
out = os.popen(gcc_exe + ' -dumpversion','r')
out_string = out.read()
out.close()
try:
out_string = out.read()
finally:
out.close()
result = re.search('(\d+\.\d+\.\d+)',out_string)
if result:
gcc_version = StrictVersion(result.group(1))

159
Lib/distutils/extension.py
View File

@ -150,87 +150,96 @@ def read_setup_file (filename):
file = TextFile(filename,
strip_comments=1, skip_blanks=1, join_lines=1,
lstrip_ws=1, rstrip_ws=1)
extensions = []
try:
extensions = []
while 1:
line = file.readline()
if line is None: # eof
break
if _variable_rx.match(line): # VAR=VALUE, handled in first pass
continue
if line[0] == line[-1] == "*":
file.warn("'%s' lines not handled yet" % line)
continue
#print "original line: " + line
line = expand_makefile_vars(line, vars)
words = split_quoted(line)
#print "expanded line: " + line
# NB. this parses a slightly different syntax than the old
# makesetup script: here, there must be exactly one extension per
# line, and it must be the first word of the line. I have no idea
# why the old syntax supported multiple extensions per line, as
# they all wind up being the same.
module = words[0]
ext = Extension(module, [])
append_next_word = None
for word in words[1:]:
if append_next_word is not None:
append_next_word.append(word)
append_next_word = None
while 1:
line = file.readline()
if line is None: # eof
break
if _variable_rx.match(line): # VAR=VALUE, handled in first pass
continue
suffix = os.path.splitext(word)[1]
switch = word[0:2] ; value = word[2:]
if line[0] == line[-1] == "*":
file.warn("'%s' lines not handled yet" % line)
continue
if suffix in (".c", ".cc", ".cpp", ".cxx", ".c++", ".m", ".mm"):
# hmm, should we do something about C vs. C++ sources?
# or leave it up to the CCompiler implementation to
# worry about?
ext.sources.append(word)
elif switch == "-I":
ext.include_dirs.append(value)
elif switch == "-D":
equals = string.find(value, "=")
if equals == -1: # bare "-DFOO" -- no value
ext.define_macros.append((value, None))
else: # "-DFOO=blah"
ext.define_macros.append((value[0:equals],
value[equals+2:]))
elif switch == "-U":
ext.undef_macros.append(value)
elif switch == "-C": # only here 'cause makesetup has it!
ext.extra_compile_args.append(word)
elif switch == "-l":
ext.libraries.append(value)
elif switch == "-L":
ext.library_dirs.append(value)
elif switch == "-R":
ext.runtime_library_dirs.append(value)
elif word == "-rpath":
append_next_word = ext.runtime_library_dirs
elif word == "-Xlinker":
append_next_word = ext.extra_link_args
elif word == "-Xcompiler":
append_next_word = ext.extra_compile_args
elif switch == "-u":
ext.extra_link_args.append(word)
if not value:
#print "original line: " + line
line = expand_makefile_vars(line, vars)
words = split_quoted(line)
#print "expanded line: " + line
# NB. this parses a slightly different syntax than the old
# makesetup script: here, there must be exactly one extension per
# line, and it must be the first word of the line. I have no idea
# why the old syntax supported multiple extensions per line, as
# they all wind up being the same.
module = words[0]
ext = Extension(module, [])
append_next_word = None
for word in words[1:]:
if append_next_word is not None:
append_next_word.append(word)
append_next_word = None
continue
suffix = os.path.splitext(word)[1]
switch = word[0:2] ; value = word[2:]
if suffix in (".c", ".cc", ".cpp", ".cxx", ".c++", ".m", ".mm"):
# hmm, should we do something about C vs. C++ sources?
# or leave it up to the CCompiler implementation to
# worry about?
ext.sources.append(word)
elif switch == "-I":
ext.include_dirs.append(value)
elif switch == "-D":
equals = string.find(value, "=")
if equals == -1: # bare "-DFOO" -- no value
ext.define_macros.append((value, None))
else: # "-DFOO=blah"
ext.define_macros.append((value[0:equals],
value[equals+2:]))
elif switch == "-U":
ext.undef_macros.append(value)
elif switch == "-C": # only here 'cause makesetup has it!
ext.extra_compile_args.append(word)
elif switch == "-l":
ext.libraries.append(value)
elif switch == "-L":
ext.library_dirs.append(value)
elif switch == "-R":
ext.runtime_library_dirs.append(value)
elif word == "-rpath":
append_next_word = ext.runtime_library_dirs
elif word == "-Xlinker":
append_next_word = ext.extra_link_args
elif suffix in (".a", ".so", ".sl", ".o", ".dylib"):
# NB. a really faithful emulation of makesetup would
# append a .o file to extra_objects only if it
# had a slash in it; otherwise, it would s/.o/.c/
# and append it to sources. Hmmmm.
ext.extra_objects.append(word)
else:
file.warn("unrecognized argument '%s'" % word)
elif word == "-Xcompiler":
append_next_word = ext.extra_compile_args
elif switch == "-u":
ext.extra_link_args.append(word)
if not value:
append_next_word = ext.extra_link_args
elif word == "-Xcompiler":
append_next_word = ext.extra_compile_args
elif switch == "-u":
ext.extra_link_args.append(word)
if not value:
append_next_word = ext.extra_link_args
elif suffix in (".a", ".so", ".sl", ".o", ".dylib"):
# NB. a really faithful emulation of makesetup would
# append a .o file to extra_objects only if it
# had a slash in it; otherwise, it would s/.o/.c/
# and append it to sources. Hmmmm.
ext.extra_objects.append(word)
else:
file.warn("unrecognized argument '%s'" % word)
extensions.append(ext)
extensions.append(ext)
finally:
file.close()
#print "module:", module
#print "source files:", source_files

8
Lib/distutils/file_util.py
View File

@ -224,6 +224,8 @@ def write_file (filename, contents):
sequence of strings without line terminators) to it.
"""
f = open(filename, "w")
for line in contents:
f.write(line + "\n")
f.close()
try:
for line in contents:
f.write(line + "\n")
finally:
f.close()

10
Lib/distutils/msvc9compiler.py
View File

@ -273,10 +273,12 @@ def query_vcvarsall(version, arch="x86"):
popen = subprocess.Popen('"%s" %s & set' % (vcvarsall, arch),
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
stdout, stderr = popen.communicate()
if popen.wait() != 0:
raise DistutilsPlatformError(stderr.decode("mbcs"))
try:
stdout, stderr = popen.communicate()
if popen.wait() != 0:
raise DistutilsPlatformError(stderr.decode("mbcs"))
finally:
popen.close()
stdout = stdout.decode("mbcs")
for line in stdout.split("\n"):

12
Lib/distutils/tests/test_build_py.py
View File

@ -19,11 +19,15 @@ class BuildPyTestCase(support.TempdirManager,
def _setup_package_data(self):
sources = self.mkdtemp()
f = open(os.path.join(sources, "__init__.py"), "w")
f.write("# Pretend this is a package.")
f.close()
try:
f.write("# Pretend this is a package.")
finally:
f.close()
f = open(os.path.join(sources, "README.txt"), "w")
f.write("Info about this package")
f.close()
try:
f.write("Info about this package")
finally:
f.close()
destination = self.mkdtemp()

6
Lib/distutils/tests/test_build_scripts.py
View File

@ -71,8 +71,10 @@ class BuildScriptsTestCase(support.TempdirManager,
def write_script(self, dir, name, text):
f = open(os.path.join(dir, name), "w")
f.write(text)
f.close()
try:
f.write(text)
finally:
f.close()
def test_version_int(self):
source = self.mkdtemp()

8
Lib/distutils/tests/test_config.py
View File

@ -108,8 +108,12 @@ class PyPIRCCommandTestCase(support.TempdirManager,
self.assertTrue(not os.path.exists(rc))
cmd._store_pypirc('tarek', 'xxx')
self.assertTrue(os.path.exists(rc))
content = open(rc).read()
self.assertEquals(content, WANTED)
f = open(rc)
try:
content = f.read()
self.assertEquals(content, WANTED)
finally:
f.close()
def test_suite():
return unittest.makeSuite(PyPIRCCommandTestCase)

6
Lib/distutils/tests/test_core.py
View File

@ -52,7 +52,11 @@ class CoreTestCase(support.EnvironGuard, unittest.TestCase):
shutil.rmtree(path)
def write_setup(self, text, path=test.test_support.TESTFN):
open(path, "w").write(text)
f = open(path, "w")
try:
f.write(text)
finally:
f.close()
return path
def test_run_setup_provides_file(self):

6
Lib/distutils/tests/test_dir_util.py
View File

@ -88,8 +88,10 @@ class DirUtilTestCase(support.TempdirManager, unittest.TestCase):
mkpath(self.target, verbose=0)
a_file = os.path.join(self.target, 'ok.txt')
f = open(a_file, 'w')
f.write('some content')
f.close()
try:
f.write('some content')
finally:
f.close()
wanted = ['copying %s -> %s' % (a_file, self.target2)]
copy_tree(self.target, self.target2, verbose=1)

42
Lib/distutils/tests/test_dist.py
View File

@ -102,29 +102,29 @@ class DistributionTestCase(support.TempdirManager,
def test_command_packages_configfile(self):
sys.argv.append("build")
self.addCleanup(os.unlink, TESTFN)
f = open(TESTFN, "w")
try:
print >>f, "[global]"
print >>f, "command_packages = foo.bar, splat"
f.close()
d = self.create_distribution([TESTFN])
self.assertEqual(d.get_command_packages(),
["distutils.command", "foo.bar", "splat"])
# ensure command line overrides config:
sys.argv[1:] = ["--command-packages", "spork", "build"]
d = self.create_distribution([TESTFN])
self.assertEqual(d.get_command_packages(),
["distutils.command", "spork"])
# Setting --command-packages to '' should cause the default to
# be used even if a config file specified something else:
sys.argv[1:] = ["--command-packages", "", "build"]
d = self.create_distribution([TESTFN])
self.assertEqual(d.get_command_packages(), ["distutils.command"])
finally:
os.unlink(TESTFN)
f.close()
d = self.create_distribution([TESTFN])
self.assertEqual(d.get_command_packages(),
["distutils.command", "foo.bar", "splat"])
# ensure command line overrides config:
sys.argv[1:] = ["--command-packages", "spork", "build"]
d = self.create_distribution([TESTFN])
self.assertEqual(d.get_command_packages(),
["distutils.command", "spork"])
# Setting --command-packages to '' should cause the default to
# be used even if a config file specified something else:
sys.argv[1:] = ["--command-packages", "", "build"]
d = self.create_distribution([TESTFN])
self.assertEqual(d.get_command_packages(), ["distutils.command"])
def test_write_pkg_file(self):
# Check DistributionMetadata handling of Unicode fields
@ -341,8 +341,10 @@ class MetadataTestCase(support.TempdirManager, support.EnvironGuard,
temp_dir = self.mkdtemp()
user_filename = os.path.join(temp_dir, user_filename)
f = open(user_filename, 'w')
f.write('.')
f.close()
try:
f.write('.')
finally:
f.close()
try:
dist = Distribution()

6
Lib/distutils/tests/test_file_util.py
View File

@ -31,8 +31,10 @@ class FileUtilTestCase(support.TempdirManager, unittest.TestCase):
def test_move_file_verbosity(self):
f = open(self.source, 'w')
f.write('some content')
f.close()
try:
f.write('some content')
finally:
f.close()
move_file(self.source, self.target, verbose=0)
wanted = []

6
Lib/distutils/tests/test_install_scripts.py
View File

@ -42,8 +42,10 @@ class InstallScriptsTestCase(support.TempdirManager,
def write_script(name, text):
expected.append(name)
f = open(os.path.join(source, name), "w")
f.write(text)
f.close()
try:
f.write(text)
finally:
f.close()
write_script("script1.py", ("#! /usr/bin/env python2.3\n"
"# bogus script w/ Python sh-bang\n"

14
Lib/distutils/tests/test_msvc9compiler.py
View File

@ -113,17 +113,21 @@ class msvc9compilerTestCase(support.TempdirManager,
tempdir = self.mkdtemp()
manifest = os.path.join(tempdir, 'manifest')
f = open(manifest, 'w')
f.write(_MANIFEST)
f.close()
try:
f.write(_MANIFEST)
finally:
f.close()
compiler = MSVCCompiler()
compiler._remove_visual_c_ref(manifest)
# see what we got
f = open(manifest)
# removing trailing spaces
content = '\n'.join([line.rstrip() for line in f.readlines()])
f.close()
try:
# removing trailing spaces
content = '\n'.join([line.rstrip() for line in f.readlines()])
finally:
f.close()
# makes sure the manifest was properly cleaned
self.assertEquals(content, _CLEANED_MANIFEST)

8
Lib/distutils/tests/test_register.py
View File

@ -119,8 +119,12 @@ class RegisterTestCase(PyPIRCCommandTestCase):
self.assertTrue(os.path.exists(self.rc))
# with the content similar to WANTED_PYPIRC
content = open(self.rc).read()
self.assertEquals(content, WANTED_PYPIRC)
f = open(self.rc)
try:
content = f.read()
self.assertEquals(content, WANTED_PYPIRC)
finally:
f.close()
# now let's make sure the .pypirc file generated
# really works : we shouldn't be asked anything

8
Lib/distutils/tests/test_sdist.py
View File

@ -234,8 +234,12 @@ class SDistTestCase(PyPIRCCommandTestCase):
self.assertEquals(len(content), 11)
# checking the MANIFEST
manifest = open(join(self.tmp_dir, 'MANIFEST')).read()
self.assertEquals(manifest, MANIFEST % {'sep': os.sep})
f = open(join(self.tmp_dir, 'MANIFEST'))
try:
manifest = f.read()
self.assertEquals(manifest, MANIFEST % {'sep': os.sep})
finally:
f.close()
@unittest.skipUnless(zlib, "requires zlib")
def test_metadata_check_option(self):

16
Lib/distutils/tests/test_sysconfig.py
View File

@ -50,9 +50,11 @@ class SysconfigTestCase(support.EnvironGuard,
def test_parse_makefile_base(self):
self.makefile = test.test_support.TESTFN
fd = open(self.makefile, 'w')
fd.write(r"CONFIG_ARGS= '--arg1=optarg1' 'ENV=LIB'" '\n')
fd.write('VAR=$OTHER\nOTHER=foo')
fd.close()
try:
fd.write(r"CONFIG_ARGS= '--arg1=optarg1' 'ENV=LIB'" '\n')
fd.write('VAR=$OTHER\nOTHER=foo')
finally:
fd.close()
d = sysconfig.parse_makefile(self.makefile)
self.assertEquals(d, {'CONFIG_ARGS': "'--arg1=optarg1' 'ENV=LIB'",
'OTHER': 'foo'})
@ -60,9 +62,11 @@ class SysconfigTestCase(support.EnvironGuard,
def test_parse_makefile_literal_dollar(self):
self.makefile = test.test_support.TESTFN
fd = open(self.makefile, 'w')
fd.write(r"CONFIG_ARGS= '--arg1=optarg1' 'ENV=\$$LIB'" '\n')
fd.write('VAR=$OTHER\nOTHER=foo')
fd.close()
try:
fd.write(r"CONFIG_ARGS= '--arg1=optarg1' 'ENV=\$$LIB'" '\n')
fd.write('VAR=$OTHER\nOTHER=foo')
finally:
fd.close()
d = sysconfig.parse_makefile(self.makefile)
self.assertEquals(d, {'CONFIG_ARGS': r"'--arg1=optarg1' 'ENV=\$LIB'",
'OTHER': 'foo'})

52
Lib/distutils/tests/test_text_file.py
View File

@ -58,28 +58,46 @@ class TextFileTestCase(support.TempdirManager, unittest.TestCase):
finally:
out_file.close()
in_file = TextFile (filename, strip_comments=0, skip_blanks=0,
lstrip_ws=0, rstrip_ws=0)
test_input (1, "no processing", in_file, result1)
in_file = TextFile(filename, strip_comments=0, skip_blanks=0,
lstrip_ws=0, rstrip_ws=0)
try:
test_input(1, "no processing", in_file, result1)
finally:
in_file.close()
in_file = TextFile (filename, strip_comments=1, skip_blanks=0,
lstrip_ws=0, rstrip_ws=0)
test_input (2, "strip comments", in_file, result2)
in_file = TextFile(filename, strip_comments=1, skip_blanks=0,
lstrip_ws=0, rstrip_ws=0)
try:
test_input(2, "strip comments", in_file, result2)
finally:
in_file.close()
in_file = TextFile (filename, strip_comments=0, skip_blanks=1,
lstrip_ws=0, rstrip_ws=0)
test_input (3, "strip blanks", in_file, result3)
in_file = TextFile(filename, strip_comments=0, skip_blanks=1,
lstrip_ws=0, rstrip_ws=0)
try:
test_input(3, "strip blanks", in_file, result3)
finally:
in_file.close()
in_file = TextFile (filename)
test_input (4, "default processing", in_file, result4)
in_file = TextFile(filename)
try:
test_input(4, "default processing", in_file, result4)
finally:
in_file.close()
in_file = TextFile (filename, strip_comments=1, skip_blanks=1,
join_lines=1, rstrip_ws=1)
test_input (5, "join lines without collapsing", in_file, result5)
in_file = TextFile(filename, strip_comments=1, skip_blanks=1,
join_lines=1, rstrip_ws=1)
try:
test_input(5, "join lines without collapsing", in_file, result5)
finally:
in_file.close()
in_file = TextFile (filename, strip_comments=1, skip_blanks=1,
join_lines=1, rstrip_ws=1, collapse_join=1)
test_input (6, "join lines with collapsing", in_file, result6)
in_file = TextFile(filename, strip_comments=1, skip_blanks=1,
join_lines=1, rstrip_ws=1, collapse_join=1)
try:
test_input(6, "join lines with collapsing", in_file, result6)
finally:
in_file.close()
def test_suite():
return unittest.makeSuite(TextFileTestCase)

16
Lib/distutils/util.py
View File

@ -116,13 +116,15 @@ def get_platform ():
# behaviour.
pass
else:
m = re.search(
r'<key>ProductUserVisibleVersion</key>\s*' +
r'<string>(.*?)</string>', f.read())
f.close()
if m is not None:
macrelease = '.'.join(m.group(1).split('.')[:2])
# else: fall back to the default behaviour
try:
m = re.search(
r'<key>ProductUserVisibleVersion</key>\s*' +
r'<string>(.*?)</string>', f.read())
if m is not None:
macrelease = '.'.join(m.group(1).split('.')[:2])
# else: fall back to the default behaviour
finally:
f.close()
if not macver:
macver = macrelease

17
Lib/sysconfig.py
View File

@ -635,13 +635,16 @@ def get_platform():
# behaviour.
pass
else:
m = re.search(
r'<key>ProductUserVisibleVersion</key>\s*' +
r'<string>(.*?)</string>', f.read())
f.close()
if m is not None:
macrelease = '.'.join(m.group(1).split('.')[:2])
# else: fall back to the default behaviour
try:
m = re.search(
r'<key>ProductUserVisibleVersion</key>\s*' +
r'<string>(.*?)</string>', f.read())
f.close()
if m is not None:
macrelease = '.'.join(m.group(1).split('.')[:2])
# else: fall back to the default behaviour
finally:
f.close()
if not macver:
macver = macrelease

3
Misc/NEWS
View File

@ -69,6 +69,9 @@ Core and Builtins
Library
-------
- Issue #10252: Close file objects in a timely manner in distutils code and
tests. Patch by Brian Brazil, completed by Éric Araujo.
- Issue #10311: The signal module now restores errno before returning from
its low-level signal handler. Patch by Hallvard B Furuseth.