rtprio(1) utility to modify realtime priority of a process.

Submitted by:	Henrik Vestergaard Draboel

1 files changed, 141 insertions, 0 deletions

diff --git a/usr.sbin/rtprio/rtprio.c b/usr.sbin/rtprio/rtprio.c
new file mode 100644
index 0000000..cc66fd4
--- /dev/null
+++ b/usr.sbin/rtprio/rtprio.c
@@ -0,0 +1,141 @@
+/*
+ * Copyright (c) 1994 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/* Copyright (c) 1994 Henrik Vestergaard Drabøl (hvd@terry.pping.dk) */
+
+#ifndef lint
+char copyright[] =
+"@(#) Copyright (c) 1989 The Regents of the University of California.\n\
+ All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+/*static char sccsid[] = "from: @(#)rtprio.c	5.4 (Berkeley) 6/1/90";*/
+static char rcsid[] = "$Id: rtprio.c,v 1.2 1993/11/23 00:02:23 jtc Exp $";
+#endif /* not lint */
+
+#include <sys/time.h>
+#include <stdio.h>
+#include <sys/rtprio.h>
+#include <locale.h>
+#include <errno.h>
+#include <err.h>
+
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <unistd.h>
+
+static void usage();
+
+int
+main(argc, argv)
+	int argc;
+	char **argv;
+{
+	int nrtprio = RTPRIO_RTOFF;
+	int proc=0;
+
+	setlocale(LC_ALL, "");
+	errno = 0;
+
+	switch (argc) {
+        case 2:
+	  proc = abs(atoi(argv[1]));
+		/* FALLTHROUGH */
+
+	case 1:
+          nrtprio = rtprio(proc,RTPRIO_NOCHG);
+          fprintf(stderr,"rtprio: %d %s\n",
+            nrtprio,
+            nrtprio==RTPRIO_RTOFF?"(RTOFF)":"");
+          exit(nrtprio); 
+		/* NOTREACHED */
+          
+        default: {
+		switch (argv[1][0]) {
+		case '-':
+		  if (strcmp(argv[1],"-t")==0)
+		       nrtprio = RTPRIO_RTOFF;
+		     else 
+		       usage();
+  		  break;
+
+		case '0':case '1':case '2':case '3':case '4':
+		case '5':case '6':case '7':case '8':case '9':
+		  nrtprio = atoi (argv[1]);
+
+		  if (errno== ERANGE) usage();
+		  break;
+
+		default:
+		  usage(); 
+		  break;
+		}
+		switch (argv[2][0]) {
+		case '-':
+		  proc = -atoi(argv[2]);
+
+  		break;
+		}
+      
+	errno = 0;
+
+        nrtprio = rtprio(proc, nrtprio);
+
+	if (errno) {
+		err (1, "rtprio");
+		/* NOTREACHED */
+	}
+
+	if (proc == 0) {
+          execvp(argv[2], &argv[2]);
+   	  err ((errno == ENOENT) ? 127 : 126, "%s", argv[2]);}
+	  /* NOTREACHED */
+	      }
+	}
+return(nrtprio);
+}
+
+static void
+usage()
+{
+	(void)fprintf(stderr, "usage: rtprio\n");
+	(void)fprintf(stderr, "usage: rtprio [-] pid\n");
+	(void)fprintf(stderr, "usage: rtprio priority command [ args ] \n");
+	(void)fprintf(stderr, "usage: rtprio priority -pid \n");
+	(void)fprintf(stderr, "usage: rtprio -t command [ args ] \n");
+	(void)fprintf(stderr, "usage: rtprio -t -pid \n");
+	
+	exit(-1);
+}