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nice(3c) [bsd man page]

NICE(3C)																  NICE(3C)

NAME
nice - set program priority SYNOPSIS
nice(incr) DESCRIPTION
This interface is obsoleted by setpriority(2). The scheduling priority of the process is augmented by incr. Positive priorities get less service than normal. Priority 10 is recommended to users who wish to execute long-running programs without flak from the administration. Negative increments are ignored except on behalf of the super-user. The priority is limited to the range -20 (most urgent) to 20 (least). The priority of a process is passed to a child process by fork(2). For a privileged process to return to normal priority from an unknown state, nice should be called successively with arguments -40 (goes to priority -20 because of truncation), 20 (to get to 0), then 0 (to maintain compatibility with previous versions of this call). SEE ALSO
nice(1), setpriority(2), fork(2), renice(8) 4th Berkeley Distribution May 9, 1985 NICE(3C)

Check Out this Related Man Page

nice(3UCB)					     SunOS/BSD Compatibility Library Functions						nice(3UCB)

NAME
nice - change priority of a process SYNOPSIS
/usr/ucb/cc[ flag ... ] file ... #include<unistd.h> int nice(incr); int incr; DESCRIPTION
The scheduling priority of the process is augmented by incr. Positive priorities get less service than normal. Priority 10 is recommended to users who wish to execute long-running programs without undue impact on system performance. Negative increments are illegal, except when specified by the privileged user. The priority is limited to the range -20 (most urgent) to 20 (least). Requests for values above or below these limits result in the scheduling priority being set to the corresponding limit. The priority of a process is passed to a child process by fork(2). For a privileged process to return to normal priority from an unknown state, nice() should be called successively with arguments -40 (goes to priority -20 because of truncation), 20 (to get to 0), then 0 (to maintain compatibility with previous versions of this call). RETURN VALUES
Upon successful completion, nice() returns 0. Otherwise, a value of -1 is returned and errno is set to indicate the error. ERRORS
The priority is not changed if: EPERM The value of incr specified was negative, and the effective user ID is not the privileged user. SEE ALSO
nice(1), renice(1), fork(2), priocntl(2), getpriority(3C) NOTES
Use of these interfaces should be restricted to only applications written on BSD platforms. Use of these interfaces with any of the system libraries or in multi-threaded applications is unsupported. SunOS 5.10 12 Feb 1993 nice(3UCB)

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