NICE (2)
change process priority
SYNOPSIS
#include <unistd.h>
int nice(int inc );
DESCRIPTION
nice
adds
inc
to the priority for the calling pid. Only the superuser may
specify a negative increment, or priority increase.
Note that internally, a higher number is a higher priority. Do not
confuse this with the priority scheme as used by the
nice
interface.
RETURN VALUE
On success, zero is returned. On error, -1 is returned, and
errno
is set appropriately.
ERRORS
EPERM
A non-super user attempts to do a priority increase, a numerical
decrease, by supplying a negative
inc .
CONFORMING TO
SVr4, SVID EXT, AT&T, X/OPEN, BSD 4.3. SVr4 documents an additional
EINVAL error code.
SEE ALSO
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