1 files changed, 101 insertions, 0 deletions
diff --git a/system_cmds/dmesg.tproj/dmesg.c b/system_cmds/dmesg.tproj/dmesg.c
new file mode 100644
index 0000000..ed62442
--- /dev/null
+++ b/system_cmds/dmesg.tproj/dmesg.c
@@ -0,0 +1,101 @@
+/*
+ * Copyright (c) 1999-2016 Apple Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
+ * Reserved.  This file contains Original Code and/or Modifications of
+ * Original Code as defined in and that are subject to the Apple Public
+ * Source License Version 1.0 (the 'License').  You may not use this file
+ * except in compliance with the License.  Please obtain a copy of the
+ * License at http://www.apple.com/publicsource and read it before using
+ * this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
+ * License for the specific language governing rights and limitations
+ * under the License."
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+/*-
+ * Copyright (c) 1991, 1993
+ *      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.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <vis.h>
+#include <sys/sysctl.h>
+#include <libproc.h>
+
+static void
+usage(void)
+{
+	(void)fprintf(stderr, "usage: sudo dmesg\n");
+	exit(1);
+}
+
+int
+main(int argc, char **argv)
+{
+	char *msgbuf, *visbuf;
+	int msgbufsize;
+	size_t sysctlsize = sizeof(msgbufsize);
+	long data_size;
+
+	if (argc > 1)
+		usage();
+
+	if (sysctlbyname("kern.msgbuf", &msgbufsize, &sysctlsize, NULL, 0)) {
+		perror("Unable to size kernel buffer");
+	}
+
+	msgbuf = malloc(msgbufsize);
+	if (msgbuf == NULL) {
+		perror("Unable to allocate a message buffer");
+	}
+
+	if ((data_size = proc_kmsgbuf(msgbuf, msgbufsize)) == 0){
+		perror("Unable to obtain kernel buffer");
+		usage();
+	}
+
+	visbuf = malloc(data_size*4);
+	strvis(visbuf, msgbuf, 0);
+	printf("%s", visbuf);
+	free(visbuf);
+	free(msgbuf);
+	exit(0);
+}