Python os.closerange() Examples

The following are code examples for showing how to use os.closerange(). They are extracted from open source Python projects. You can vote up the examples you like or vote down the exmaples you don't like. You can also save this page to your account.

Example 1
Project: zippy   Author: securesystemslab   File: test_os.py    (license) View Source Project 6 votes vote down vote up
def test_closerange(self):
        first = os.open(support.TESTFN, os.O_CREAT|os.O_RDWR)
        # We must allocate two consecutive file descriptors, otherwise
        # it will mess up other file descriptors (perhaps even the three
        # standard ones).
        second = os.dup(first)
        try:
            retries = 0
            while second != first + 1:
                os.close(first)
                retries += 1
                if retries > 10:
                    # XXX test skipped
                    self.skipTest("couldn't allocate two consecutive fds")
                first, second = second, os.dup(second)
        finally:
            os.close(second)
        # close a fd that is open, and one that isn't
        os.closerange(first, first + 2)
        self.assertRaises(OSError, os.write, first, b"a") 
Example 2
Project: oil   Author: oilshell   File: test_os.py    (license) View Source Project 6 votes vote down vote up
def test_closerange(self):
        first = os.open(test_support.TESTFN, os.O_CREAT|os.O_RDWR)
        # We must allocate two consecutive file descriptors, otherwise
        # it will mess up other file descriptors (perhaps even the three
        # standard ones).
        second = os.dup(first)
        try:
            retries = 0
            while second != first + 1:
                os.close(first)
                retries += 1
                if retries > 10:
                    # XXX test skipped
                    self.skipTest("couldn't allocate two consecutive fds")
                first, second = second, os.dup(second)
        finally:
            os.close(second)
        # close a fd that is open, and one that isn't
        os.closerange(first, first + 2)
        self.assertRaises(OSError, os.write, first, "a") 
Example 3
Project: python2-tracer   Author: extremecoders-re   File: test_os.py    (license) View Source Project 6 votes vote down vote up
def test_closerange(self):
        first = os.open(test_support.TESTFN, os.O_CREAT|os.O_RDWR)
        # We must allocate two consecutive file descriptors, otherwise
        # it will mess up other file descriptors (perhaps even the three
        # standard ones).
        second = os.dup(first)
        try:
            retries = 0
            while second != first + 1:
                os.close(first)
                retries += 1
                if retries > 10:
                    # XXX test skipped
                    self.skipTest("couldn't allocate two consecutive fds")
                first, second = second, os.dup(second)
        finally:
            os.close(second)
        # close a fd that is open, and one that isn't
        os.closerange(first, first + 2)
        self.assertRaises(OSError, os.write, first, "a") 
Example 4
Project: web_ctp   Author: molebot   File: test_os.py    (license) View Source Project 6 votes vote down vote up
def test_closerange(self):
        first = os.open(support.TESTFN, os.O_CREAT|os.O_RDWR)
        # We must allocate two consecutive file descriptors, otherwise
        # it will mess up other file descriptors (perhaps even the three
        # standard ones).
        second = os.dup(first)
        try:
            retries = 0
            while second != first + 1:
                os.close(first)
                retries += 1
                if retries > 10:
                    # XXX test skipped
                    self.skipTest("couldn't allocate two consecutive fds")
                first, second = second, os.dup(second)
        finally:
            os.close(second)
        # close a fd that is open, and one that isn't
        os.closerange(first, first + 2)
        self.assertRaises(OSError, os.write, first, b"a") 
Example 5
Project: treadmill   Author: Morgan-Stanley   File: utils.py    (license) View Source Project 6 votes vote down vote up
def sane_execvp(filename, args, close_fds=True, restore_signals=True):
    """Execute a new program with sanitized environment.
    """
    def _restore_signals():
        """Reset the default behavior to all signals.
        """
        for i in _SIGNALS:
            signal.signal(i, signal.SIG_DFL)

    def _close_fds():
        """Close all file descriptors except 0, 1, 2.
        """
        os.closerange(3, subprocess.MAXFD)

    if close_fds:
        _close_fds()
    if restore_signals:
        _restore_signals()
    os.execvp(filename, args) 
Example 6
Project: pefile.pypy   Author: cloudtracer   File: test_os.py    (license) View Source Project 6 votes vote down vote up
def test_closerange(self):
        first = os.open(test_support.TESTFN, os.O_CREAT|os.O_RDWR)
        # We must allocate two consecutive file descriptors, otherwise
        # it will mess up other file descriptors (perhaps even the three
        # standard ones).
        second = os.dup(first)
        try:
            retries = 0
            while second != first + 1:
                os.close(first)
                retries += 1
                if retries > 10:
                    # XXX test skipped
                    self.skipTest("couldn't allocate two consecutive fds")
                first, second = second, os.dup(second)
        finally:
            os.close(second)
        # close a fd that is open, and one that isn't
        os.closerange(first, first + 2)
        self.assertRaises(OSError, os.write, first, "a") 
Example 7
Project: ouroboros   Author: pybee   File: test_os.py    (license) View Source Project 6 votes vote down vote up
def test_closerange(self):
        first = os.open(support.TESTFN, os.O_CREAT|os.O_RDWR)
        # We must allocate two consecutive file descriptors, otherwise
        # it will mess up other file descriptors (perhaps even the three
        # standard ones).
        second = os.dup(first)
        try:
            retries = 0
            while second != first + 1:
                os.close(first)
                retries += 1
                if retries > 10:
                    # XXX test skipped
                    self.skipTest("couldn't allocate two consecutive fds")
                first, second = second, os.dup(second)
        finally:
            os.close(second)
        # close a fd that is open, and one that isn't
        os.closerange(first, first + 2)
        self.assertRaises(OSError, os.write, first, b"a") 
Example 8
Project: ndk-python   Author: gittor   File: test_os.py    (license) View Source Project 6 votes vote down vote up
def test_closerange(self):
        first = os.open(test_support.TESTFN, os.O_CREAT|os.O_RDWR)
        # We must allocate two consecutive file descriptors, otherwise
        # it will mess up other file descriptors (perhaps even the three
        # standard ones).
        second = os.dup(first)
        try:
            retries = 0
            while second != first + 1:
                os.close(first)
                retries += 1
                if retries > 10:
                    # XXX test skipped
                    self.skipTest("couldn't allocate two consecutive fds")
                first, second = second, os.dup(second)
        finally:
            os.close(second)
        # close a fd that is open, and one that isn't
        os.closerange(first, first + 2)
        self.assertRaises(OSError, os.write, first, "a") 
Example 9
Project: kbe_server   Author: xiaohaoppy   File: test_os.py    (license) View Source Project 6 votes vote down vote up
def test_closerange(self):
        first = os.open(support.TESTFN, os.O_CREAT|os.O_RDWR)
        # We must allocate two consecutive file descriptors, otherwise
        # it will mess up other file descriptors (perhaps even the three
        # standard ones).
        second = os.dup(first)
        try:
            retries = 0
            while second != first + 1:
                os.close(first)
                retries += 1
                if retries > 10:
                    # XXX test skipped
                    self.skipTest("couldn't allocate two consecutive fds")
                first, second = second, os.dup(second)
        finally:
            os.close(second)
        # close a fd that is open, and one that isn't
        os.closerange(first, first + 2)
        self.assertRaises(OSError, os.write, first, b"a") 
Example 10
Project: kinect-2-libras   Author: inessadl   File: subprocess.py    (Apache License 2.0) View Source Project 5 votes vote down vote up
def _close_fds(self, but):
            if hasattr(os, 'closerange'):
                os.closerange(3, but)
                os.closerange(but + 1, MAXFD)
            else:
                for i in xrange(3, MAXFD):
                    if i == but:
                        continue
                    try:
                        os.close(i)
                    except:
                        pass 
Example 11
Project: kinect-2-libras   Author: inessadl   File: popen2.py    (Apache License 2.0) View Source Project 5 votes vote down vote up
def _run_child(self, cmd):
        if isinstance(cmd, basestring):
            cmd = ['/bin/sh', '-c', cmd]
        os.closerange(3, MAXFD)
        try:
            os.execvp(cmd[0], cmd)
        finally:
            os._exit(1) 
Example 12
Project: NeoAnalysis   Author: neoanalysis   File: __init__.py    (license) View Source Project 5 votes vote down vote up
def exit():
    """
    Causes python to exit without garbage-collecting any objects, and thus avoids
    calling object destructor methods. This is a sledgehammer workaround for 
    a variety of bugs in PyQt and Pyside that cause crashes on exit.
    
    This function does the following in an attempt to 'safely' terminate
    the process:
    
    * Invoke atexit callbacks
    * Close all open file handles
    * os._exit()
    
    Note: there is some potential for causing damage with this function if you
    are using objects that _require_ their destructors to be called (for example,
    to properly terminate log files, disconnect from devices, etc). Situations
    like this are probably quite rare, but use at your own risk.
    """
    
    ## first disable our own cleanup function; won't be needing it.
    setConfigOptions(exitCleanup=False)
    
    ## invoke atexit callbacks
    atexit._run_exitfuncs()
    
    ## close file handles
    if sys.platform == 'darwin':
        for fd in range(3, 4096):
            if fd not in [7]:  # trying to close 7 produces an illegal instruction on the Mac.
                os.close(fd)
    else:
        os.closerange(3, 4096) ## just guessing on the maximum descriptor count..

    os._exit(0)
    


## Convenience functions for command-line use 
Example 13
Project: NeoAnalysis   Author: neoanalysis   File: __init__.py    (license) View Source Project 5 votes vote down vote up
def exit():
    """
    Causes python to exit without garbage-collecting any objects, and thus avoids
    calling object destructor methods. This is a sledgehammer workaround for 
    a variety of bugs in PyQt and Pyside that cause crashes on exit.
    
    This function does the following in an attempt to 'safely' terminate
    the process:
    
    * Invoke atexit callbacks
    * Close all open file handles
    * os._exit()
    
    Note: there is some potential for causing damage with this function if you
    are using objects that _require_ their destructors to be called (for example,
    to properly terminate log files, disconnect from devices, etc). Situations
    like this are probably quite rare, but use at your own risk.
    """
    
    ## first disable our own cleanup function; won't be needing it.
    setConfigOptions(exitCleanup=False)
    
    ## invoke atexit callbacks
    atexit._run_exitfuncs()
    
    ## close file handles
    if sys.platform == 'darwin':
        for fd in range(3, 4096):
            if fd not in [7]:  # trying to close 7 produces an illegal instruction on the Mac.
                os.close(fd)
    else:
        os.closerange(3, 4096) ## just guessing on the maximum descriptor count..

    os._exit(0)
    


## Convenience functions for command-line use 
Example 14
Project: hostapd-mana   Author: adde88   File: subprocess.py    (license) View Source Project 5 votes vote down vote up
def _close_fds(self, but):
            if hasattr(os, 'closerange'):
                os.closerange(3, but)
                os.closerange(but + 1, MAXFD)
            else:
                for i in xrange(3, MAXFD):
                    if i == but:
                        continue
                    try:
                        os.close(i)
                    except:
                        pass 
Example 15
Project: hostapd-mana   Author: adde88   File: popen2.py    (license) View Source Project 5 votes vote down vote up
def _run_child(self, cmd):
        if isinstance(cmd, basestring):
            cmd = ['/bin/sh', '-c', cmd]
        os.closerange(3, MAXFD)
        try:
            os.execvp(cmd[0], cmd)
        finally:
            os._exit(1) 
Example 16
Project: Intranet-Penetration   Author: yuxiaokui   File: subprocess.py    (license) View Source Project 5 votes vote down vote up
def _close_fds(self, but):
            if hasattr(os, 'closerange'):
                os.closerange(3, but)
                os.closerange(but + 1, MAXFD)
            else:
                for i in xrange(3, MAXFD):
                    if i == but:
                        continue
                    try:
                        os.close(i)
                    except:
                        pass 
Example 17
Project: Intranet-Penetration   Author: yuxiaokui   File: subprocess.py    (license) View Source Project 5 votes vote down vote up
def _close_fds(self, but):
            if hasattr(os, 'closerange'):
                os.closerange(3, but)
                os.closerange(but + 1, MAXFD)
            else:
                for i in xrange(3, MAXFD):
                    if i == but:
                        continue
                    try:
                        os.close(i)
                    except:
                        pass 
Example 18
Project: Intranet-Penetration   Author: yuxiaokui   File: subprocess.py    (license) View Source Project 5 votes vote down vote up
def _close_fds(self, but):
            if hasattr(os, 'closerange'):
                os.closerange(3, but)
                os.closerange(but + 1, MAXFD)
            else:
                for i in xrange(3, MAXFD):
                    if i == but:
                        continue
                    try:
                        os.close(i)
                    except:
                        pass 
Example 19
Project: flasky   Author: RoseOu   File: util.py    (license) View Source Project 5 votes vote down vote up
def closerange(fd_low, fd_high):
        # Iterate through and close all file descriptors.
        for fd in range(fd_low, fd_high):
            try:
                os.close(fd)
            except OSError:  # ERROR, fd wasn't open to begin with (ignored)
                pass 
Example 20
Project: MKFQ   Author: maojingios   File: subprocess.py    (license) View Source Project 5 votes vote down vote up
def _close_fds(self, but):
            if hasattr(os, 'closerange'):
                os.closerange(3, but)
                os.closerange(but + 1, MAXFD)
            else:
                for i in xrange(3, MAXFD):
                    if i == but:
                        continue
                    try:
                        os.close(i)
                    except:
                        pass 
Example 21
Project: MKFQ   Author: maojingios   File: subprocess.py    (license) View Source Project 5 votes vote down vote up
def _close_fds(self, but):
            if hasattr(os, 'closerange'):
                os.closerange(3, but)
                os.closerange(but + 1, MAXFD)
            else:
                for i in xrange(3, MAXFD):
                    if i == but:
                        continue
                    try:
                        os.close(i)
                    except:
                        pass 
Example 22
Project: MKFQ   Author: maojingios   File: subprocess.py    (license) View Source Project 5 votes vote down vote up
def _close_fds(self, but):
            if hasattr(os, 'closerange'):
                os.closerange(3, but)
                os.closerange(but + 1, MAXFD)
            else:
                for i in xrange(3, MAXFD):
                    if i == but:
                        continue
                    try:
                        os.close(i)
                    except:
                        pass 
Example 23
Project: oa_qian   Author: sunqb   File: subprocess.py    (license) View Source Project 5 votes vote down vote up
def _close_fds(self, keep):
            # `keep` is a set of fds, so we
            # use os.closerange from 3 to min(keep)
            # and then from max(keep + 1) to MAXFD and
            # loop through filling in the gaps.
            # Under new python versions, we need to explicitly set
            # passed fds to be inheritable or they will go away on exec
            if hasattr(os, 'set_inheritable'):
                set_inheritable = os.set_inheritable
            else:
                set_inheritable = lambda i, v: True
            if hasattr(os, 'closerange'):
                keep = sorted(keep)
                min_keep = min(keep)
                max_keep = max(keep)
                os.closerange(3, min_keep)
                os.closerange(max_keep + 1, MAXFD)
                for i in xrange(min_keep, max_keep):
                    if i in keep:
                        set_inheritable(i, True)
                        continue

                    try:
                        os.close(i)
                    except:
                        pass
            else:
                for i in xrange(3, MAXFD):
                    if i in keep:
                        set_inheritable(i, True)
                        continue
                    try:
                        os.close(i)
                    except:
                        pass 
Example 24
Project: RealtimePythonChat   Author: quangtqag   File: subprocess.py    (license) View Source Project 5 votes vote down vote up
def _close_fds(self, keep):
            # `keep` is a set of fds, so we
            # use os.closerange from 3 to min(keep)
            # and then from max(keep + 1) to MAXFD and
            # loop through filling in the gaps.
            # Under new python versions, we need to explicitly set
            # passed fds to be inheritable or they will go away on exec
            if hasattr(os, 'set_inheritable'):
                set_inheritable = os.set_inheritable
            else:
                set_inheritable = lambda i, v: True
            if hasattr(os, 'closerange'):
                keep = sorted(keep)
                min_keep = min(keep)
                max_keep = max(keep)
                os.closerange(3, min_keep)
                os.closerange(max_keep + 1, MAXFD)
                for i in xrange(min_keep, max_keep):
                    if i in keep:
                        set_inheritable(i, True)
                        continue

                    try:
                        os.close(i)
                    except:
                        pass
            else:
                for i in xrange(3, MAXFD):
                    if i in keep:
                        set_inheritable(i, True)
                        continue
                    try:
                        os.close(i)
                    except:
                        pass 
Example 25
Project: zippy   Author: securesystemslab   File: subprocess.py    (license) View Source Project 5 votes vote down vote up
def _close_fds(self, fds_to_keep):
            start_fd = 3
            for fd in sorted(fds_to_keep):
                if fd >= start_fd:
                    os.closerange(start_fd, fd)
                    start_fd = fd + 1
            if start_fd <= MAXFD:
                os.closerange(start_fd, MAXFD) 
Example 26
Project: zippy   Author: securesystemslab   File: test_os.py    (license) View Source Project 5 votes vote down vote up
def test_closerange(self):
        if hasattr(os, "closerange"):
            fd = support.make_bad_fd()
            # Make sure none of the descriptors we are about to close are
            # currently valid (issue 6542).
            for i in range(10):
                try: os.fstat(fd+i)
                except OSError:
                    pass
                else:
                    break
            if i < 2:
                raise unittest.SkipTest(
                    "Unable to acquire a range of invalid file descriptors")
            self.assertEqual(os.closerange(fd, fd + i-1), None) 
Example 27
Project: chihu   Author: yelongyu   File: util.py    (license) View Source Project 5 votes vote down vote up
def closerange(fd_low, fd_high):
        # Iterate through and close all file descriptors.
        for fd in range(fd_low, fd_high):
            try:
                os.close(fd)
            except OSError:  # ERROR, fd wasn't open to begin with (ignored)
                pass 
Example 28
Project: ShelbySearch   Author: Agentscreech   File: util.py    (license) View Source Project 5 votes vote down vote up
def closerange(fd_low, fd_high):
        # Iterate through and close all file descriptors.
        for fd in range(fd_low, fd_high):
            try:
                os.close(fd)
            except OSError:  # ERROR, fd wasn't open to begin with (ignored)
                pass 
Example 29
Project: Price-Comparator   Author: Thejas-1   File: util.py    (license) View Source Project 5 votes vote down vote up
def closerange(fd_low, fd_high):
        # Iterate through and close all file descriptors.
        for fd in range(fd_low, fd_high):
            try:
                os.close(fd)
            except OSError:  # ERROR, fd wasn't open to begin with (ignored)
                pass 
Example 30
Project: oil   Author: oilshell   File: subprocess.py    (license) View Source Project 5 votes vote down vote up
def _close_fds(self, but):
            if hasattr(os, 'closerange'):
                os.closerange(3, but)
                os.closerange(but + 1, MAXFD)
            else:
                for i in xrange(3, MAXFD):
                    if i == but:
                        continue
                    try:
                        os.close(i)
                    except:
                        pass 
Example 31
Project: oil   Author: oilshell   File: test_os.py    (license) View Source Project 5 votes vote down vote up
def test_closerange(self):
        fd = test_support.make_bad_fd()
        # Make sure none of the descriptors we are about to close are
        # currently valid (issue 6542).
        for i in range(10):
            try: os.fstat(fd+i)
            except OSError:
                pass
            else:
                break
        if i < 2:
            raise unittest.SkipTest(
                "Unable to acquire a range of invalid file descriptors")
        self.assertEqual(os.closerange(fd, fd + i-1), None) 
Example 32
Project: oil   Author: oilshell   File: popen2.py    (license) View Source Project 5 votes vote down vote up
def _run_child(self, cmd):
        if isinstance(cmd, basestring):
            cmd = ['/bin/sh', '-c', cmd]
        os.closerange(3, MAXFD)
        try:
            os.execvp(cmd[0], cmd)
        finally:
            os._exit(1) 
Example 33
Project: python2-tracer   Author: extremecoders-re   File: ShellWindow.py    (license) View Source Project 5 votes vote down vote up
def spawn(prog, args):
    p2cread, p2cwrite = os.pipe()
    c2pread, c2pwrite = os.pipe()
    pid = os.fork()
    if pid == 0:
        # Child
        for i in 0, 1, 2:
            try:
                os.close(i)
            except os.error:
                pass
        if os.dup(p2cread) <> 0:
            sys.stderr.write('popen2: bad read dup\n')
        if os.dup(c2pwrite) <> 1:
            sys.stderr.write('popen2: bad write dup\n')
        if os.dup(c2pwrite) <> 2:
            sys.stderr.write('popen2: bad write dup\n')
        os.closerange(3, MAXFD)
        try:
            os.execvp(prog, args)
        finally:
            sys.stderr.write('execvp failed\n')
            os._exit(1)
    os.close(p2cread)
    os.close(c2pwrite)
    return pid, c2pread, p2cwrite 
Example 34
Project: python2-tracer   Author: extremecoders-re   File: subprocess.py    (license) View Source Project 5 votes vote down vote up
def _close_fds(self, but):
            if hasattr(os, 'closerange'):
                os.closerange(3, but)
                os.closerange(but + 1, MAXFD)
            else:
                for i in xrange(3, MAXFD):
                    if i == but:
                        continue
                    try:
                        os.close(i)
                    except:
                        pass 
Example 35
Project: python2-tracer   Author: extremecoders-re   File: test_os.py    (license) View Source Project 5 votes vote down vote up
def test_closerange(self):
        fd = test_support.make_bad_fd()
        # Make sure none of the descriptors we are about to close are
        # currently valid (issue 6542).
        for i in range(10):
            try: os.fstat(fd+i)
            except OSError:
                pass
            else:
                break
        if i < 2:
            raise unittest.SkipTest(
                "Unable to acquire a range of invalid file descriptors")
        self.assertEqual(os.closerange(fd, fd + i-1), None) 
Example 36
Project: python2-tracer   Author: extremecoders-re   File: popen2.py    (license) View Source Project 5 votes vote down vote up
def _run_child(self, cmd):
        if isinstance(cmd, basestring):
            cmd = ['/bin/sh', '-c', cmd]
        os.closerange(3, MAXFD)
        try:
            os.execvp(cmd[0], cmd)
        finally:
            os._exit(1) 
Example 37
Project: tabmaster   Author: NicolasMinghetti   File: util.py    (license) View Source Project 5 votes vote down vote up
def closerange(fd_low, fd_high):
        # Iterate through and close all file descriptors.
        for fd in range(fd_low, fd_high):
            try:
                os.close(fd)
            except OSError:  # ERROR, fd wasn't open to begin with (ignored)
                pass 
Example 38
Project: sslstrip-hsts-openwrt   Author: adde88   File: subprocess.py    (license) View Source Project 5 votes vote down vote up
def _close_fds(self, but):
            if hasattr(os, 'closerange'):
                os.closerange(3, but)
                os.closerange(but + 1, MAXFD)
            else:
                for i in xrange(3, MAXFD):
                    if i == but:
                        continue
                    try:
                        os.close(i)
                    except:
                        pass 
Example 39
Project: sslstrip-hsts-openwrt   Author: adde88   File: popen2.py    (license) View Source Project 5 votes vote down vote up
def _run_child(self, cmd):
        if isinstance(cmd, basestring):
            cmd = ['/bin/sh', '-c', cmd]
        os.closerange(3, MAXFD)
        try:
            os.execvp(cmd[0], cmd)
        finally:
            os._exit(1) 
Example 40
Project: web_ctp   Author: molebot   File: subprocess.py    (license) View Source Project 5 votes vote down vote up
def _close_fds(self, fds_to_keep):
            start_fd = 3
            for fd in sorted(fds_to_keep):
                if fd >= start_fd:
                    os.closerange(start_fd, fd)
                    start_fd = fd + 1
            if start_fd <= MAXFD:
                os.closerange(start_fd, MAXFD) 
Example 41
Project: web_ctp   Author: molebot   File: test_os.py    (license) View Source Project 5 votes vote down vote up
def test_closerange(self):
        if hasattr(os, "closerange"):
            fd = support.make_bad_fd()
            # Make sure none of the descriptors we are about to close are
            # currently valid (issue 6542).
            for i in range(10):
                try: os.fstat(fd+i)
                except OSError:
                    pass
                else:
                    break
            if i < 2:
                raise unittest.SkipTest(
                    "Unable to acquire a range of invalid file descriptors")
            self.assertEqual(os.closerange(fd, fd + i-1), None) 
Example 42
Project: infiblog   Author: RajuKoushik   File: util.py    (license) View Source Project 5 votes vote down vote up
def closerange(fd_low, fd_high):
        # Iterate through and close all file descriptors.
        for fd in range(fd_low, fd_high):
            try:
                os.close(fd)
            except OSError:  # ERROR, fd wasn't open to begin with (ignored)
                pass 
Example 43
Project: xxNet   Author: drzorm   File: subprocess.py    (license) View Source Project 5 votes vote down vote up
def _close_fds(self, but):
            if hasattr(os, 'closerange'):
                os.closerange(3, but)
                os.closerange(but + 1, MAXFD)
            else:
                for i in xrange(3, MAXFD):
                    if i == but:
                        continue
                    try:
                        os.close(i)
                    except:
                        pass 
Example 44
Project: xxNet   Author: drzorm   File: subprocess.py    (license) View Source Project 5 votes vote down vote up
def _close_fds(self, but):
            if hasattr(os, 'closerange'):
                os.closerange(3, but)
                os.closerange(but + 1, MAXFD)
            else:
                for i in xrange(3, MAXFD):
                    if i == but:
                        continue
                    try:
                        os.close(i)
                    except:
                        pass 
Example 45
Project: xxNet   Author: drzorm   File: subprocess.py    (license) View Source Project 5 votes vote down vote up
def _close_fds(self, but):
            if hasattr(os, 'closerange'):
                os.closerange(3, but)
                os.closerange(but + 1, MAXFD)
            else:
                for i in xrange(3, MAXFD):
                    if i == but:
                        continue
                    try:
                        os.close(i)
                    except:
                        pass 
Example 46
Project: qudi   Author: Ulm-IQO   File: helpers.py    (license) View Source Project 5 votes vote down vote up
def exit(exitcode=0):
    """
    Causes python to exit without garbage-collecting any objects, and thus
    avoids calling object destructor methods. This is a sledgehammer
    workaround for a variety of bugs in PyQt and Pyside that cause crashes
    on exit.

    This function does the following in an attempt to 'safely' terminate
    the process:

    * Invoke atexit callbacks
    * Close all open file handles
    * os._exit()

    Note: there is some potential for causing damage with this function if you
    are using objects that _require_ their destructors to be called (for
    example, to properly terminate log files, disconnect from devices, etc).
    Situations like this are probably quite rare, but use at your own risk.

    @param int exitcode: system exit code
    """

    if has_pyqtgraph:
        # first disable our pyqtgraph's cleanup function; won't be needing it.
        pyqtgraph.setConfigOptions(exitCleanup=False)

    # invoke atexit callbacks
    atexit._run_exitfuncs()

    # close file handles
    if sys.platform == 'darwin':
        for fd in range(3, 4096):
            # trying to close 7 produces an illegal instruction on the Mac.
            if fd not in [7]:
                os.close(fd)
    else:
        # just guessing on the maximum descriptor count..
        os.closerange(3, 4096)

    os._exit(exitcode) 
Example 47
Project: py_daemoniker   Author: Muterra   File: _daemonize_unix.py    (license) View Source Project 5 votes vote down vote up
def _autoclose_files(shielded=None, fallback_limit=1024):
    ''' Automatically close any open file descriptors.
    
    shielded is iterable of file descriptors.
    '''
    # Process shielded.
    shielded = default_to(shielded, [])
    
    # Figure out the maximum number of files to try to close.
    # This returns a tuple of softlimit, hardlimit; the hardlimit is always
    # greater.
    softlimit, hardlimit = resource.getrlimit(resource.RLIMIT_NOFILE)
    
    # If the hard limit is infinity, we can't iterate to it.
    if hardlimit == resource.RLIM_INFINITY:
        # Check the soft limit. If it's also infinity, fallback to guess.
        if softlimit == resource.RLIM_INFINITY:
            fdlimit = fallback_limit
            
        # The soft limit is finite, so fallback to that.
        else:
            fdlimit = softlimit
            
    # The hard limit is not infinity, so prefer it.
    else:
        fdlimit = hardlimit
    
    # Skip fd 0, 1, 2, which are used by stdin, stdout, and stderr
    # (respectively)
    ranges_to_close = _make_range_tuples(
        start = 3,
        stop = fdlimit,
        exclude = shielded
    )
    for start, stop in ranges_to_close:
        # How nice of os to include this for us!
        os.closerange(start, stop) 
Example 48
Project: pefile.pypy   Author: cloudtracer   File: test_os.py    (license) View Source Project 5 votes vote down vote up
def test_closerange(self):
        fd = test_support.make_bad_fd()
        # Make sure none of the descriptors we are about to close are
        # currently valid (issue 6542).
        for i in range(10):
            try: os.fstat(fd+i)
            except OSError:
                pass
            else:
                break
        if i < 2:
            raise unittest.SkipTest(
                "Unable to acquire a range of invalid file descriptors")
        self.assertEqual(os.closerange(fd, fd + i-1), None) 
Example 49
Project: pefile.pypy   Author: cloudtracer   File: popen2.py    (license) View Source Project 5 votes vote down vote up
def _run_child(self, cmd):
        if isinstance(cmd, basestring):
            cmd = ['/bin/sh', '-c', cmd]
        os.closerange(3, MAXFD)
        try:
            os.execvp(cmd[0], cmd)
        finally:
            os._exit(1) 
Example 50
Project: ouroboros   Author: pybee   File: subprocess.py    (license) View Source Project 5 votes vote down vote up
def _close_fds(self, fds_to_keep):
            start_fd = 3
            for fd in sorted(fds_to_keep):
                if fd >= start_fd:
                    os.closerange(start_fd, fd)
                    start_fd = fd + 1
            if start_fd <= MAXFD:
                os.closerange(start_fd, MAXFD)