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-.\" Copyright (c) 1992 Drew Eckhardt <drew@cs.colorado.edu>, March 28, 1992
-.\"
-.\" SPDX-License-Identifier: Linux-man-pages-copyleft
-.\"
-.\" 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 <mtk.manpages@gmail.com>
-.\"
-.TH nice 2 (date) "Linux man-pages (unreleased)"
-.SH NAME
-nice \- change process priority
-.SH LIBRARY
-Standard C library
-.RI ( libc ", " \-lc )
-.SH SYNOPSIS
-.nf
-.B #include <unistd.h>
-.P
-.BI "int nice(int " inc );
-.fi
-.P
-.RS -4
-Feature Test Macro Requirements for glibc (see
-.BR feature_test_macros (7)):
-.RE
-.P
-.BR nice ():
-.nf
-    _XOPEN_SOURCE
-        || /* Since glibc 2.19: */ _DEFAULT_SOURCE
-        || /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
-.fi
-.SH DESCRIPTION
-.BR nice ()
-adds
-.I inc
-to the nice value for the calling thread.
-(A higher nice value means a lower priority.)
-.P
-The range of the nice value is +19 (low priority) to \-20 (high priority).
-Attempts to set a nice value outside the range are clamped to the range.
-.P
-Traditionally, only a privileged process could lower the nice value
-(i.e., set a higher priority).
-However, since Linux 2.6.12, an unprivileged process can decrease
-the nice value of a target process that has a suitable
-.B RLIMIT_NICE
-soft limit; see
-.BR getrlimit (2)
-for details.
-.SH RETURN VALUE
-On success, the new nice value is returned (but see NOTES below).
-On error, \-1 is returned, and
-.I errno
-is set to indicate the error.
-.P
-A successful call can legitimately return \-1.
-To detect an error, set
-.I errno
-to 0 before the call, and check whether it is nonzero after
-.BR nice ()
-returns \-1.
-.SH ERRORS
-.TP
-.B EPERM
-The calling process attempted to increase its priority by
-supplying a negative
-.I inc
-but has insufficient privileges.
-Under Linux, the
-.B CAP_SYS_NICE
-capability is required.
-(But see the discussion of the
-.B RLIMIT_NICE
-resource limit in
-.BR setrlimit (2).)
-.SH VERSIONS
-.SS C library/kernel differences
-POSIX.1 specifies that
-.BR nice ()
-should return the new nice value.
-However, the raw Linux system call returns 0 on success.
-Likewise, the
-.BR nice ()
-wrapper function provided in glibc 2.2.3 and earlier returns 0 on success.
-.P
-Since glibc 2.2.4, the
-.BR nice ()
-wrapper function provided by glibc provides conformance to POSIX.1 by calling
-.BR getpriority (2)
-to obtain the new nice value, which is then returned to the caller.
-.SH STANDARDS
-POSIX.1-2008.
-.SH HISTORY
-POSIX.1-2001, SVr4, 4.3BSD.
-.\" SVr4 documents an additional
-.\" .B EINVAL
-.\" error code.
-.SH NOTES
-For further details on the nice value, see
-.BR sched (7).
-.P
-.IR Note :
-the addition of the "autogroup" feature in Linux 2.6.38 means that
-the nice value no longer has its traditional effect in many circumstances.
-For details, see
-.BR sched (7).
-.SH SEE ALSO
-.BR nice (1),
-.BR renice (1),
-.BR fork (2),
-.BR getpriority (2),
-.BR getrlimit (2),
-.BR setpriority (2),
-.BR capabilities (7),
-.BR sched (7)