1 files changed, 45 insertions, 0 deletions
diff --git a/sysdeps/unix/bsd/nice.c b/sysdeps/unix/bsd/nice.c
new file mode 100644
index 0000000000..01f1412adf
--- /dev/null
+++ b/sysdeps/unix/bsd/nice.c
@@ -0,0 +1,45 @@
+/* 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);
+}