Package portage :: Module locks

Module locks

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Functions

[hide private]

lockdir(mydir)

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unlockdir(mylock)

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lockfile(mypath, wantnewlockfile=0, unlinkfile=0, waiting_msg=None, flags=0)
Creates all dirs upto, the given dir.

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Integer

_fstat_nlink(fd)
Returns: the current number of hardlinks to the file

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unlockfile(mytuple)

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hardlock_name(path)

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hardlink_is_mine(link, lock)

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hardlink_lockfile(lockfilename, max_wait=14400)
Does the NFS, hardlink shuffle to ensure locking on the disk.

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unhardlink_lockfile(lockfilename)

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hardlock_cleanup(path, remove_all_locks=False)

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Variables

[hide private]

HARDLINK_FD = -2

_quiet = False

Imports: errno, os, stat, time, types, DirectoryNotFound, FileNotFound, InvalidData, TryAgain, portage_gid, writemsg, _

Function Details

[hide private]

lockfile(mypath, wantnewlockfile=0, unlinkfile=0, waiting_msg=None, flags=0)

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Creates all dirs upto, the given dir. Creates a lockfile for the given directory as the file: directoryname+'.portage_lockfile'.

_fstat_nlink(fd)

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Parameters:

fd (Integer) - an open file descriptor

Returns: Integer

the current number of hardlinks to the file

hardlink_lockfile(lockfilename, max_wait=14400)

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Does the NFS, hardlink shuffle to ensure locking on the disk. We create a PRIVATE lockfile, that is just a placeholder on the disk. Then we HARDLINK the real lockfile to that private file. If our file can 2 references, then we have the lock. :) Otherwise we lather, rise, and repeat. We default to a 4 hour timeout.