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sv_acquire [ startwin [ nwins [ nbackground ]]]
sv_release
sv_acquire changes the owner, group and permissions of window system devices to the user ID, group ID, and the permissions specified in /etc/svdtab (see svdtab.5 if there is an entry in that file. If no entry exists in /etc/svdtab, no changes will be made.
sv_release returns the owner, and group to root and wheel. The permissions are set as specified in /etc/svdtab.
startwin indicates the first win to change, nwins indicates the number of windows to change, nbackgound indicates the number of win devices to change in the backgound.
This is a setuid root program spawned by the window system (for example, sunview.1 sv_acquire exits if the user does not own console devices listed in /etc/fbtab (see fbtab.5 sv_acquire exits with 0 on success and -1 on failure.
In the following example, sv_acquire sets the user ID and the group ID of /dev/win0 through /dev/win15 in the foreground and spawns a background process to set /dev/win16 through /dev/win256 and exit with error status.
The purpose of spawning a background process is to allow the caller to avoid waiting for all win devices to be changed. Note: a diskless 3/50 sets approximately 16 wins per second.
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Created by unroff & hp-tools. © somebody (See intro for details). All Rights Reserved. Last modified 11/5/97