Mercurial > public > mercurial-scm > hg-stable
diff mercurial/util.py @ 1877:d314a89fa4f1
change lock format to let us detect and break stale locks.
old style: symlink to pid
new style: symlink to hostname:pid
if lock code finds new-style lock, it breaks lock if locking pid is on
same machine and pid is not alive.
otherwise, lock is left alone. this makes locking code safe with
old-style locks and with locks on other machines.
new code makes server part of mercurial more robust in case machine
crashes, power fails, or crazy user does kill -9.
| author | Vadim Gelfer <vadim.gelfer@gmail.com> |
|---|---|
| date | Fri, 10 Mar 2006 08:31:31 -0800 |
| parents | bdfb524d728a |
| children | 05c7d75be925 |
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--- a/mercurial/util.py Fri Mar 10 11:34:02 2006 +0100 +++ b/mercurial/util.py Fri Mar 10 08:31:31 2006 -0800 @@ -499,7 +499,7 @@ return pf try: # ActivePython can create hard links using win32file module - import win32file + import win32api, win32con, win32file def os_link(src, dst): # NB will only succeed on NTFS win32file.CreateHardLink(dst, src) @@ -516,8 +516,18 @@ except: return os.stat(pathname).st_nlink + def testpid(pid): + '''return False if pid is dead, True if running or not known''' + try: + win32api.OpenProcess(win32con.PROCESS_QUERY_INFORMATION, + False, pid) + except: + return True + except ImportError: - pass + def testpid(pid): + '''return False if pid dead, True if running or not known''' + return True def is_exec(f, last): return last @@ -614,6 +624,14 @@ else: raise + def testpid(pid): + '''return False if pid dead, True if running or not sure''' + try: + os.kill(pid, 0) + return True + except OSError, inst: + return inst.errno != errno.ESRCH + def explain_exit(code): """return a 2-tuple (desc, code) describing a process's status""" if os.WIFEXITED(code):