LOCKDEV

Section: (8)
Updated: SEPTEMBER 2009
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NAME

Lockdev is a setgid binary, which provides a reliable way to put an exclusive lock in /var/lock to devices (e.g. ttyS0) using both FSSTND and SVr4 methods, so regular users don't need write access there.

This task is achieved through calls to the liblockdev(3) API.

 

SYNOPSIS

/usr/sbin/lockdev [<operation>] <device>

 

DESCRIPTION

The lockdev command can perform one of the following operations (calls to liblockdev(3) API):

-l - lock device with dev_lock() function

-u - unlock device with dev_unlock() function

no operation - test lock with dev_testlock() function

 

RETURN VALUES


   Value  dev_lock         dev_unlock       dev_testlock
   0      OK               OK               not locked
   1      locked other     locked other     locked
   2      EACCES
   3      EROFS
   4      EFAULT
   5      EINVAL
   6      ENAMETOOLONG
   7      ENOENT
   8      ENOTDIR
   9      ENOMEM
  10      ELOOP
  11      EIO
  12      EPERM
 255      error               error               error

 

SEE ALSO

lockdev(3).


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUES
SEE ALSO
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