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diff --git a/man2/nice.2 b/man2/nice.2 new file mode 100644 index 000000000..a5e2369a8 --- /dev/null +++ b/man2/nice.2 @@ -0,0 +1,84 @@ +.\" Hey Emacs! This file is -*- nroff -*- source. +.\" +.\" Copyright (c) 1992 Drew Eckhardt <drew@cs.colorado.edu>, March 28, 1992 +.\" +.\" Permission is granted to make and distribute verbatim copies of this +.\" manual provided the copyright notice and this permission notice are +.\" preserved on all copies. +.\" +.\" Permission is granted to copy and distribute modified versions of this +.\" manual under the conditions for verbatim copying, provided that the +.\" entire resulting derived work is distributed under the terms of a +.\" permission notice identical to this one. +.\" +.\" Since the Linux kernel and libraries are constantly changing, this +.\" manual page may be incorrect or out-of-date. The author(s) assume no +.\" responsibility for errors or omissions, or for damages resulting from +.\" the use of the information contained herein. The author(s) may not +.\" have taken the same level of care in the production of this manual, +.\" which is licensed free of charge, as they might when working +.\" professionally. +.\" +.\" Formatted or processed versions of this manual, if unaccompanied by +.\" the source, must acknowledge the copyright and authors of this work. +.\" +.\" Modified by Michael Haardt <michael@moria.de> +.\" Modified 1993-07-24 by Rik Faith <faith@cs.unc.edu> +.\" Modified 1996-11-04 by Eric S. Raymond <esr@thyrsus.com> +.\" Modified 2001-06-04 by aeb +.\" Modified 2004-05-27 by Michael Kerrisk <mtk16@ext.canterbury.ac.nz> +.\" +.TH NICE 2 2004-05-27 "Linux 2.6.6" "Linux Programmer's Manual" +.SH NAME +nice \- change process priority +.SH SYNOPSIS +.B #include <unistd.h> +.sp +.BI "int nice(int " inc ); +.SH DESCRIPTION +.B nice +adds +.I inc +to the nice value for the calling pid. +(A large nice value means a low priority.) +Only the super\%user may specify a negative increment, or priority increase. +.SH "RETURN VALUE" +On success, zero is returned. On error, \-1 is returned, and +.I errno +is set appropriately. +.SH ERRORS +.TP +.B EPERM +The calling process attempted to increase its priority by +supplying a negative +.IR inc +but has insufficient privileges. +Under Linux the +.B CAP_SYS_NICE +capability is required. +.SH "CONFORMING TO" +SVr4, SVID EXT, AT&T, X/OPEN, BSD 4.3. However, the Linux and glibc +(earlier than glibc 2.2.4) return value is nonstandard, see below. +SVr4 documents an additional +EINVAL error code. +.SH NOTES +Note that the routine is documented in SUSv2 and POSIX 1003.1-2003 +to return the new nice value, while the Linux syscall and (g)libc +(earlier than glibc 2.2.4) routines return 0 on success. +The new nice value can be found using +.BR getpriority (2). +Note that an implementation in which +.B nice +returns the new nice value can legitimately return \-1. +To reliably detect an error, set +.I errno +to 0 before the call, and check its value when +.B nice +returns \-1. +.SH "SEE ALSO" +.BR nice (1), +.BR fork (2), +.BR getpriority (2), +.BR setpriority (2), +.BR capabilities (7), +.BR renice (8) |