def getPwd(pid):
"""
Provices the working directory of the given process. This raises an IOError
if it can't be determined.
Arguments:
pid - pid of the process
"""
if not pid: raise IOError("we couldn't get the pid")
elif pid in PWD_CACHE: return PWD_CACHE[pid]
# try fetching via the proc contents if available
if procTools.isProcAvailable():
try:
pwd = procTools.getPwd(pid)
PWD_CACHE[pid] = pwd
return pwd
except IOError: pass # fall back to pwdx
elif os.uname()[0] in ("Darwin", "FreeBSD", "OpenBSD"):
# BSD neither useres the above proc info nor does it have pwdx. Use lsof to
# determine this instead:
# https://trac.torproject.org/projects/tor/ticket/4236
#
# ~$ lsof -a -p 75717 -d cwd -Fn
# p75717
# n/Users/atagar/tor/src/or
try:
results = call("lsof -a -p %s -d cwd -Fn" % pid)
if results and len(results) == 2 and results[1].startswith("n/"):
pwd = results[1][1:].strip()
PWD_CACHE[pid] = pwd
return pwd
except IOError, exc: pass
try:
# pwdx results are of the form:
# 3799: /home/atagar
# 5839: No such process
results = call("pwdx %s" % pid)
if not results:
raise IOError("pwdx didn't return any results")
elif results[0].endswith("No such process"):
raise IOError("pwdx reported no process for pid " + pid)
elif len(results) != 1 or results[0].count(" ") != 1:
raise IOError("we got unexpected output from pwdx")
else:
pwd = results[0][results[0].find(" ") + 1:].strip()
PWD_CACHE[pid] = pwd
return pwd
except IOError, exc:
raise IOError("the pwdx call failed: " + str(exc))
def getPwd(pid):
"""
Provices the working directory of the given process. This raises an IOError
if it can't be determined.
Arguments:
pid - pid of the process
"""
if not pid: raise IOError("we couldn't get the pid")
elif pid in PWD_CACHE: return PWD_CACHE[pid]
# try fetching via the proc contents if available
if procTools.isProcAvailable():
try:
pwd = procTools.getPwd(pid)
PWD_CACHE[pid] = pwd
return pwd
except IOError:
pass # fall back to pwdx
try:
# pwdx results are of the form:
# 3799: /home/atagar
# 5839: No such process
results = call("pwdx %s" % pid)
if not results:
raise IOError("pwdx didn't return any results")
elif results[0].endswith("No such process"):
raise IOError("pwdx reported no process for pid " + pid)
elif len(results) != 1 or results[0].count(" ") != 1:
raise IOError("we got unexpected output from pwdx")
else:
pwd = results[0][results[0].find(" ") + 1:].strip()
PWD_CACHE[pid] = pwd
return pwd
except IOError, exc:
raise IOError("the pwdx call failed: " + str(exc))
def getPwd(pid):
"""
Provices the working directory of the given process. This raises an IOError
if it can't be determined.
Arguments:
pid - pid of the process
"""
if not pid: raise IOError("we couldn't get the pid")
elif pid in PWD_CACHE: return PWD_CACHE[pid]
# try fetching via the proc contents if available
if procTools.isProcAvailable():
try:
pwd = procTools.getPwd(pid)
PWD_CACHE[pid] = pwd
return pwd
except IOError: pass # fall back to pwdx
try:
# pwdx results are of the form:
# 3799: /home/atagar
# 5839: No such process
results = call("pwdx %s" % pid)
if not results:
raise IOError("pwdx didn't return any results")
elif results[0].endswith("No such process"):
raise IOError("pwdx reported no process for pid " + pid)
elif len(results) != 1 or results[0].count(" ") != 1:
raise IOError("we got unexpected output from pwdx")
else:
pwd = results[0][results[0].find(" ") + 1:].strip()
PWD_CACHE[pid] = pwd
return pwd
except IOError, exc:
raise IOError("the pwdx call failed: " + str(exc))
