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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 pri‐
     ority is a value in the range -20 to 20.  The default priority is 0;
     lower priorities cause more favorable scheduling.	Only a process with
     appropriate privileges may lower priorities.

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

RETURN VALUES
     Upon successful completion, nice() returns the new nice value minus
     NZERO.  Otherwise, -1 is returned, the process' nice value is not
     changed, and errno is set to indicate the error.

ERRORS
     The nice() function will fail if:

     [EPERM]		The incr argument is negative and the caller does not
			have appropriate privileges.

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

STANDARDS
     The nice() function conforms to X/Open Portability Guide Issue 4,
     Version 2 (“XPG4.2”).

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

BSD				April 30, 2011				   BSD

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