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-rw-r--r--sysdeps/unix/nice.c45
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diff --git a/sysdeps/unix/nice.c b/sysdeps/unix/nice.c
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+/* 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);
+}