B ß‹d‘ ã@s<dZddlmZddlZddlZddlZdd„Zdd„ZdS)z  A simple module for acquiring pidfile locks (e.g., for use by daemons). Copyright (C) 2010 by Peter F. Couvares, Syracuse University mailto: pfcouvar@syr.edu é)Úprint_functionNc CsÚt|dƒ}yt | ¡tjtjB¡Wn2tk rX}ztd||fƒ‚Wdd}~XYnX| d¡|  ¡  ¡}|  ¡rªt j  t|ƒ¡rštd||fƒ‚ntd||fƒ| d¡| dt ¡¡| ¡t|ƒdS) a„ Tries to write a lockfile containing the current pid. Excepts if the lockfile already contains the pid of a running process. Although this should prevent a lock from being granted twice, it can theoretically deny a lock unjustly in the unlikely event that the original process is gone but another unrelated process has been assigned the same pid by the OS. za+zfailed to lock %s: %sNrz1pidfile %s contains pid (%s) of a running processz2pidfile %s contains stale pid %s; writing new lockz%d T)ÚopenÚfcntlZflockÚfilenoZLOCK_EXZLOCK_NBÚIOErrorÚ RuntimeErrorÚseekÚreadlineÚstripÚisdigitÚglueÚutilsZ pid_existsÚintÚprintÚtruncateÚwriteÚosÚgetpidÚcloseÚ confirm_lock)ÚlockfileÚpidfileÚeÚ pidfile_pid©rúY/work/yifan.wang/ringdown/master-ringdown-env/lib/python3.7/site-packages/glue/pidfile.pyÚget_locks$ "    rcCsHt|dƒ}| ¡ ¡}| ¡t|ƒt ¡krDtd|t ¡|fƒ‚dS)z‚ Confirm that the given lockfile contains our pid. Should be entirely unecessary, but paranoia always served me well. Úrz,pidfile %s contains pid %s; expected pid %s!T)rr r rrrrr)rrrrrrrAs  r) Ú__doc__Ú __future__rrrZ glue.utilsr rrrrrrÚs   +