DragonFly On-Line Manual Pages


NICE(3) 	      DragonFly 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 the super-user 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. Other- wise, -1 is returned, the process' nice value is not changed, and errno is set appropriately.

ERRORS

The nice() function will fail if: [EPERM] The incr argument is negative and the calling process does not have super-user privileges.

SEE ALSO

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

HISTORY

A nice() syscall appeared in Version 6 AT&T UNIX. DragonFly 3.7 June 25, 2009 DragonFly 3.7