NICE(2)             Linux Programmer's Manual             NICE(2)

NAME
       nice - 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  prior-
       ity increase.

       Note  that  internally, a higher number is a higher prior-
       ity.  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
       nice(1), setpriority(2), fork(2), renice(8)

Linux                     March 28, 1992                        1