'''
Inspector(dbfile, pidfile).snapshot(mode)
if __name__ == '__main__':
if len(sys.argv) != 4:
print >> sys.stderr, "This module is not intended to use directly!"
sys.exit(1)
pidfile, dbfile, mode = sys.argv[1:]
is_alive(pidfile)
# Double-fork stuff
try:
if os.fork() > 0:
reinit_crypto()
sys.exit(0)
else:
reinit_crypto()
except OSError as ex:
sys.exit(1)
os.setsid()
os.umask(0)
try:
pid = os.fork()
if pid > 0:
reinit_crypto()
with salt.utils.fopen(pidfile, 'w') as fp_:
fp_.write('{0}\n'.format(pid))
def __fork_ptys(self):
'''
Fork the PTY
The major difference from the python source is that we separate the
stdout from stderr output.
'''
stdout_parent_fd, stdout_child_fd = pty.openpty()
if stdout_parent_fd < 0 or stdout_child_fd < 0:
raise TerminalException('Failed to open a TTY for stdout')
stderr_parent_fd, stderr_child_fd = pty.openpty()
if stderr_parent_fd < 0 or stderr_child_fd < 0:
raise TerminalException('Failed to open a TTY for stderr')
pid = os.fork()
if pid < pty.CHILD:
raise TerminalException('Failed to fork')
elif pid == pty.CHILD:
# Child.
# Close parent FDs
os.close(stdout_parent_fd)
os.close(stderr_parent_fd)
reinit_crypto()
# ----- Make STDOUT the controlling PTY --------------------->
child_name = os.ttyname(stdout_child_fd)
# Disconnect from controlling tty. Harmless if not already
# connected
try:
tty_fd = os.open('/dev/tty', os.O_RDWR | os.O_NOCTTY)
if tty_fd >= 0:
os.close(tty_fd)
# which exception, shouldn't we catch explicitly .. ?
except: # pylint: disable=W0702
# Already disconnected. This happens if running inside cron
pass
# New session!
os.setsid()
# Verify we are disconnected from controlling tty
# by attempting to open it again.
try:
tty_fd = os.open('/dev/tty', os.O_RDWR | os.O_NOCTTY)
if tty_fd >= 0:
os.close(tty_fd)
raise TerminalException(
'Failed to disconnect from controlling tty. It is '
'still possible to open /dev/tty.'
)
# which exception, shouldn't we catch explicitly .. ?
except: # pylint: disable=W0702
# Good! We are disconnected from a controlling tty.
pass
# Verify we can open child pty.
tty_fd = os.open(child_name, os.O_RDWR)
if tty_fd < 0:
raise TerminalException(
'Could not open child pty, {0}'.format(child_name)
)
else:
os.close(tty_fd)
# Verify we now have a controlling tty.
if os.name != 'posix':
# Only do this check in not BSD-like operating systems. BSD-like operating systems breaks at this point
tty_fd = os.open('/dev/tty', os.O_WRONLY)
if tty_fd < 0:
raise TerminalException(
'Could not open controlling tty, /dev/tty'
)
else:
os.close(tty_fd)
# <---- Make STDOUT the controlling PTY ----------------------
# ----- Duplicate Descriptors ------------------------------->
os.dup2(stdout_child_fd, pty.STDIN_FILENO)
os.dup2(stdout_child_fd, pty.STDOUT_FILENO)
os.dup2(stderr_child_fd, pty.STDERR_FILENO)
# <---- Duplicate Descriptors --------------------------------
else:
# Parent. Close Child PTY's
reinit_crypto()
os.close(stdout_child_fd)
os.close(stderr_child_fd)
return pid, stdout_parent_fd, stderr_parent_fd
'''
Inspector(dbfile, pidfile).snapshot(mode)
if __name__ == '__main__':
if len(sys.argv) != 4:
print >> sys.stderr, "This module is not intended to use directly!"
sys.exit(1)
pidfile, dbfile, mode = sys.argv[1:]
is_alive(pidfile)
# Double-fork stuff
try:
if os.fork() > 0:
reinit_crypto()
sys.exit(0)
else:
reinit_crypto()
except OSError as ex:
sys.exit(1)
os.setsid()
os.umask(0)
try:
pid = os.fork()
if pid > 0:
reinit_crypto()
fpid = open(pidfile, "w")
fpid.write("{0}\n".format(pid))