freebsd man page for nice

NICE(3) 						   BSD Library Functions Manual 						   NICE(3)

NAME
     nice -- set program scheduling priority

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <unistd.h>

     int
     nice(int incr);

DESCRIPTION
     This interface is obsoleted by setpriority(2).

     The nice() function obtains the scheduling priority of the process from the system and sets it to the priority value specified in incr.  The
     priority is a value in the range -20 to 20.  The default priority is 0; lower priorities cause more favorable scheduling.	Only the super-
     user may lower priorities.

     Children inherit the priority of their parent processes via fork(2).

SEE ALSO
     nice(1), fork(2), setpriority(2), renice(8)

HISTORY
     A nice() syscall appeared in Version 6 AT&T UNIX.

BSD
								   June 4, 1993 							       BSD