86 lines
2.2 KiB
Python
86 lines
2.2 KiB
Python
# Terminator by Chris Jones <cmsj@tenshu.net>
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# GPL v2 only
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"""cwd.py - function necessary to get the cwd for a given pid on various OSes
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>>> cwd = get_default_cwd()
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>>> cwd.__class__.__name__
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'str'
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>>> func = get_pid_cwd()
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>>> func.__class__.__name__
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'function'
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"""
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import platform
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import os
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import pwd
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from .util import dbg, err
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try:
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import psutil
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psutil_avail = True
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except (ImportError):
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dbg('psutil not found')
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psutil_avail = False
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def get_default_cwd():
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"""Determine a reasonable default cwd"""
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try:
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cwd = os.getcwd()
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except (FileNotFoundError,OSError):
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err("unable to set current working directory, does not exist")
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cwd = '/'
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return(cwd)
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def get_pid_cwd():
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"""Determine an appropriate cwd function for the OS we are running on"""
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func = lambda pid: None
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system = platform.system()
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if system == 'Linux':
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dbg('Using Linux get_pid_cwd')
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func = linux_get_pid_cwd
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elif system == 'FreeBSD':
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try:
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from . import freebsd
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func = freebsd.get_process_cwd
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dbg('Using FreeBSD get_pid_cwd')
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except (OSError, NotImplementedError, ImportError):
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dbg('FreeBSD version too old for get_pid_cwd')
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elif system == 'SunOS':
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dbg('Using SunOS get_pid_cwd')
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func = sunos_get_pid_cwd
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elif psutil_avail:
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func = psutil_cwd
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else:
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dbg('Unable to determine a get_pid_cwd for OS: %s' % system)
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return(func)
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def proc_get_pid_cwd(pid, path):
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"""Extract the cwd of a PID from proc, given the PID and the /proc path to
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insert it into, e.g. /proc/%s/cwd"""
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try:
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cwd = os.path.realpath(path % pid)
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except Exception as ex:
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err('Unable to get cwd for PID %s: %s' % (pid, ex))
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cwd = '/'
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return(cwd)
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def linux_get_pid_cwd(pid):
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"""Determine the cwd for a given PID on Linux kernels"""
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return(proc_get_pid_cwd(pid, '/proc/%s/cwd'))
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def sunos_get_pid_cwd(pid):
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"""Determine the cwd for a given PID on SunOS kernels"""
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return(proc_get_pid_cwd(pid, '/proc/%s/path/cwd'))
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def psutil_cwd(pid):
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"""Determine the cwd using psutil which also supports Darwin"""
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return psutil.Process(pid).as_dict()['cwd']
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# vim: set expandtab ts=4 sw=4:
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