awk - oneliner vs multiple line . Post: 302758291

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LEARN ABOUT DEBIAN

hal-lock

HAL-LOCK(1)						      General Commands Manual						       HAL-LOCK(1)

NAME

       hal-lock - lock an interface

SYNOPSIS

       hal-lock [options]

DESCRIPTION

       hal-lock  can  be used to acquire a lock on a given interface either on a given device or globally. For more information about both the big
       picture and the semantics of HAL locks, refer to the HAL spec which can be found in /usr/share/doc/hal-doc/spec/hal-spec.html depending	on
       the distribution.

OPTIONS

       The following options are supported:

       --interface
	      The name of the interface to lock.

       --run  Program to run if the lock was acquired.

       --udi  The UDI (Unique Device Identifier) of the device object. If this is ommitted, the global lock will be tried.

       --exclusive
	      Whether the lock can be held by others.

       --exit-with-lock
	      Kill the program if the acquired lock is lost. This only makes sense if you pass a specific UDI due to the semantics of HAL locks.

       --exit-with-dev
	      Kill the program if the device is removed. This only makes sense if you pass a specific UDI due to the semantics of HAL locks.

       --help Print out usage.

       --version
	      Print the version.

RETURN VALUE

       This  program  will  attempt  to grab a lock on a given interface.  Unless, a specific UDI is given, the global lock will be tried.  If the
       lock was succesfully acquired the program specified by the option --run will be run and upon termination this program will exit	with  exit
       code  0.  If  the  lock wasn't acquired or an error occured while taking the lock, this program will exit with a non-zero exit code and the
       given program will not be run.

NOTES

       This program is only useful for launching software that doesn't use HAL at all (since such software launched using hal-lock would be locked
       out itself); for example a partition table editor part-foo may use wrapper script like this

       hal-lock --interface org.freedesktop.Hal.Device.Storage --exclusive --run /path/to/part-foo-program

BUGS

       Please send bug reports to either the distribution or the HAL mailing list, see http://lists.freedesktop.org/mailman/listinfo/hal on how to
       subscribe.

SEE ALSO

       hald(8), lshal(1), hal-get-property(1), hal-set-property(1), hal-find-by-property(1), hal-find-by-capability(1)

AUTHOR

       Written by David Zeuthen <david@fubar.dk> with a lot of help from many others.

																       HAL-LOCK(1)

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