def symlink(src, dest):
# Make sure we have a kerberos ticket.
if src.startswith('/pnfs/') and not pnfs_is_mounted:
if debug:
print('*** Larbatch_posix: Make symbolic link from %s to %s using nfs server.' % (src, dest))
larbatch_utilities.test_ticket()
cmd = ['ssh', larbatch_utilities.nfs_server(), 'ln', '-s', src, dest]
jobinfo = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
q = queue.Queue()
thread = threading.Thread(target=larbatch_utilities.wait_for_subprocess, args=[jobinfo, q])
thread.start()
thread.join(timeout=60)
if thread.is_alive():
if debug:
print('*** Larbatch_posix: Terminating subprocess.')
jobinfo.terminate()
thread.join()
rc = q.get()
jobout = convert_str(q.get())
joberr = convert_str(q.get())
if rc != 0:
raise IFDHError(cmd, rc, jobout, joberr)
else:
if debug:
print('*** Larbatch_posix: Make symbolic link from %s to %s using posix.' % (src, dest))
os.symlink(src, dest)
def readlink(path):
result = ''
# Make sure we have a kerberos ticket.
if path.startswith('/pnfs/') and not_pnfs_is_mounted:
if debug:
print(
'*** Larbatch_posix: Read symbolic link %s using nfs server.' %
path)
larbatch_utilities.test_ticket()
cmd = ['ssh', larbatch_utilities.nfs_server(), 'readlink', path]
jobinfo = subprocess.Popen(cmd,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
q = queue.Queue()
thread = threading.Thread(
target=larbatch_utilities.wait_for_subprocess, args=[jobinfo, q])
thread.start()
thread.join(timeout=60)
if thread.is_alive():
if debug:
print('*** Larbatch_posix: Terminating subprocess.')
jobinfo.terminate()
thread.join()
rc = q.get()
jobout = convert_str(q.get())
joberr = convert_str(q.get())
if rc != 0:
raise IFDHError(cmd, rc, jobout, joberr)
result = jobout.strip()
else:
if debug:
print('*** Larbatch_posix: Read symbolic link %s using posix.' %
path)
result = os.readlink(path)
# Done.
return result