mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-13 16:50:06 +00:00
46 lines
1.4 KiB
C
46 lines
1.4 KiB
C
|
/* Copyright (C) 1992 Free Software Foundation, Inc.
|
||
|
|
This file is part of the GNU C Library.
|
||
|
|
|
||
|
|
The GNU C Library is free software; you can redistribute it and/or
|
||
|
|
modify it under the terms of the GNU Library General Public License as
|
||
|
|
published by the Free Software Foundation; either version 2 of the
|
||
|
|
License, or (at your option) any later version.
|
||
|
|
|
||
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
||
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
|
|
Library General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU Library General Public
|
||
|
|
License along with the GNU C Library; see the file COPYING.LIB. If
|
||
|
|
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
|
||
|
|
Cambridge, MA 02139, USA. */
|
||
|
|
|
||
|
|
#include <ansidecl.h>
|
||
|
|
#include <errno.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <sys/resource.h>
|
||
|
|
|
||
|
|
/* Increment the scheduling priority of the calling process by INCR.
|
||
|
|
The superuser may use a negative INCR to decrement the priority. */
|
||
|
|
int
|
||
|
|
DEFUN(nice, (incr), int incr)
|
||
|
|
{
|
||
|
|
int save;
|
||
|
|
int prio;
|
||
|
|
|
||
|
|
/* -1 is a valid priority, so we use errno to check for an error. */
|
||
|
|
save = errno;
|
||
|
|
errno = 0;
|
||
|
|
prio = getpriority (PRIO_PROCESS, 0);
|
||
|
|
if (prio == -1)
|
||
|
|
{
|
||
|
|
if (errno != 0)
|
||
|
|
return -1;
|
||
|
|
else
|
||
|
|
errno = save;
|
||
|
|
}
|
||
|
|
|
||
|
|
return setpriority (PRIO_PROCESS, 0, prio + incr);
|
||
|
|
}
|