i386_set_ioperm man page on DragonFly

i386_set_ioperm man page on DragonFly

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I386_GET_IOPERM(2)	    BSD System Calls Manual	    I386_GET_IOPERM(2)

NAME
     i386_get_ioperm, i386_set_ioperm — manage per-process access to the i386
     I/O port space

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <machine/sysarch.h>

     int
     i386_get_ioperm(unsigned int start, unsigned int *length, int *enable);

     int
     i386_set_ioperm(unsigned int start, unsigned int length, int enable);

DESCRIPTION
     i386_get_ioperm() will return the permission for the process' I/O port
     space in the *enable argument.  The port range starts at start and the
     number of contiguous entries will be returned in *length.

     i386_set_ioperm() will set access to a range of I/O ports described by
     the start and length arguments to the state specified by the enable argu‐
     ment.

RETURN VALUES
     Upon successful completion, the value 0 is returned; otherwise the
     value -1 is returned and the global variable errno is set to indicate the
     error.

ERRORS
     i386_get_ioperm() and i386_set_ioperm() will fail if:

     [EINVAL]		An invalid range was specified by the start or length
			arguments.

     [EPERM]		The caller of i386_set_ioperm() was not the superuser.

SEE ALSO
     io(4)

AUTHORS
     This man page was written by Jonathan Lemon.

BSD				 July 27, 1998				   BSD

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