Added 'renice' command, thanks to Dave Cinege <dcinege@psychosis.com>

-Erik

renice.c

@@ -0,0 +1,53 @@
+/*
+ * Mini renice implementation for busybox
+ *
+ *
+ * Copyright (C) 2000 Dave 'Kill a Cop' Cinege <dcinege@psychosis.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include "internal.h"
+#include <stdio.h>
+#include <errno.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+
+
+extern int renice_main(int argc, char **argv)
+{
+	int prio, err = 0;
+	
+	if (argc < 3)	usage(renice_usage);
+		
+	prio = atoi(*++argv);
+	if (prio > 20)		prio = 20;
+	if (prio < -20)		prio = -20;
+	
+	while (*++argv) {
+		int ps = atoi(*argv);
+		int oldp = getpriority(PRIO_PROCESS, ps);
+		
+		if (setpriority(PRIO_PROCESS, ps, prio) == 0) {
+			printf("%d: old priority %d, new priority %d\n", ps, oldp, prio );
+		} else {
+			fprintf(stderr, "renice: %d: setpriority: ", ps);
+			perror("");
+			err = 1;
+		}
+	}
+	exit(err);
+}