WTSupported in traditional Synergy on Windows
WNSupported in Synergy .NET on Windows
USupported on UNIX
VSupported on OpenVMS
One of the following identifiers or corresponding values: (n)
Allow only exclusive read and write access for the file. With this option set, other users cannot access the file.
Allow read-only access for the file. With this option set, other users can read but not write to the file.
Allow other users to both read and write to the file.
The SHARE qualifier specifies whether a file can be accessed by other users.
To achieve the exclusive access of Q_EXCL_RW and Q_EXCL_RO, the systems file permissions must allow write access to the file.
The default share_spec value depends on the mode in which the file was opened: If the file was opened in input or update mode, both read and write access is allowed by default (that is, Q_NO_EXCL or 2); however, if the file was opened in output or append mode, only exclusive access is allowed (that is, Q_EXCL_RW or 0).
On UNIX, except on Solaris systems, setting the LOCK:Q_NO_LOCK qualifier overrides an exclusively locked file that was opened using an exclusive SHARE qualifier (either Q_EXCL_RW or Q_EXCL_RO). Except on Solaris systems with system option #33 set, opening a file with Q_EXCL_RO generates a “File in use” error when another process has the same file open with Q_EXCL_RO, regardless of the OPEN mode.
On OpenVMS, opening a file Q_EXCL_RW minimizes lock activity.
The SHARE qualifier has no effect on an OPEN statement where the OPEN mode specified is either append (A) or output (O).