[src/trunk]: src/sbin/gpt Add a "header" subcommand that displays information...

[jnemeth <jnemeth%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/7581cce40525
branches:  trunk
changeset: 811517:7581cce40525
user:      jnemeth <jnemeth%NetBSD.org@localhost>
date:      Tue Nov 03 02:19:24 2015 +0000

description:
Add a "header" subcommand that displays information about the size of
the disk along with information from the GPT header if it exists.

diffstat:

 sbin/gpt/Makefile |    4 +-
 sbin/gpt/gpt.8    |   10 ++-
 sbin/gpt/gpt.c    |   14 ++--
 sbin/gpt/gpt.h    |    1 +
 sbin/gpt/header.c |  145 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 164 insertions(+), 10 deletions(-)

diffs (256 lines):

diff -r ff177de6a0b6 -r 7581cce40525 sbin/gpt/Makefile
--- a/sbin/gpt/Makefile Tue Nov 03 02:04:12 2015 +0000
+++ b/sbin/gpt/Makefile Tue Nov 03 02:19:24 2015 +0000
@@ -1,8 +1,8 @@
-# $NetBSD: Makefile,v 1.13 2014/12/29 16:27:06 christos Exp $
+# $NetBSD: Makefile,v 1.14 2015/11/03 02:19:24 jnemeth Exp $
 # $FreeBSD: src/sbin/gpt/Makefile,v 1.7 2005/09/01 02:49:20 marcel Exp $
 
 PROG=  gpt
-SRCS=  add.c biosboot.c create.c destroy.c gpt.c label.c map.c \
+SRCS=  add.c biosboot.c create.c destroy.c gpt.c header.c label.c map.c \
        migrate.c recover.c remove.c resize.c resizedisk.c \
        set.c show.c type.c unset.c gpt_uuid.c
 MAN=   gpt.8
diff -r ff177de6a0b6 -r 7581cce40525 sbin/gpt/gpt.8
--- a/sbin/gpt/gpt.8    Tue Nov 03 02:04:12 2015 +0000
+++ b/sbin/gpt/gpt.8    Tue Nov 03 02:19:24 2015 +0000
@@ -1,4 +1,4 @@
-.\" $NetBSD: gpt.8,v 1.36 2014/12/06 21:53:55 wiz Exp $
+.\" $NetBSD: gpt.8,v 1.37 2015/11/03 02:19:24 jnemeth Exp $
 .\"
 .\" Copyright (c) 2002 Marcel Moolenaar
 .\" All rights reserved.
@@ -26,7 +26,7 @@
 .\"
 .\" $FreeBSD: src/sbin/gpt/gpt.8,v 1.17 2006/06/22 22:22:32 marcel Exp $
 .\"
-.Dd December 6, 2014
+.Dd November 2, 2015
 .Dt GPT 8
 .Os
 .Sh NAME
@@ -271,6 +271,12 @@
 option instructs
 .Nm
 to destroy the table in a way that it can be recovered.
+.\" ==== header ====
+.It Nm Ic header Ar device ...
+The
+.Ic header
+command displays size information about the media and information from the
+GPT header if it exists.
 .\" ==== label ====
 .It Nm Ic label Oo Fl a Oc Ao Fl f Ar file | Fl l Ar label Ac Ar device ...
 .It Nm Ic label Oo Fl b Ar blocknr Oc Oo Fl i Ar index Oc \
diff -r ff177de6a0b6 -r 7581cce40525 sbin/gpt/gpt.c
--- a/sbin/gpt/gpt.c    Tue Nov 03 02:04:12 2015 +0000
+++ b/sbin/gpt/gpt.c    Tue Nov 03 02:19:24 2015 +0000
@@ -35,7 +35,7 @@
 __FBSDID("$FreeBSD: src/sbin/gpt/gpt.c,v 1.16 2006/07/07 02:44:23 marcel Exp $");
 #endif
 #ifdef __RCSID
-__RCSID("$NetBSD: gpt.c,v 1.40 2014/12/29 16:27:06 christos Exp $");
+__RCSID("$NetBSD: gpt.c,v 1.41 2015/11/03 02:19:24 jnemeth Exp $");
 #endif
 
 #include <sys/param.h>
@@ -553,6 +553,7 @@
        { cmd_biosboot, "biosboot" },
        { cmd_create, "create" },
        { cmd_destroy, "destroy" },
+       { cmd_header, "header" },
        { NULL, "help" },
        { cmd_label, "label" },
        { cmd_migrate, "migrate" },
@@ -576,10 +577,10 @@
 usage(void)
 {
        extern const char addmsg1[], addmsg2[], biosbootmsg[];
-       extern const char createmsg[], destroymsg[], labelmsg1[], labelmsg2[];
-       extern const char labelmsg3[], migratemsg[], recovermsg[], removemsg1[];
-       extern const char removemsg2[], resizemsg[], resizediskmsg[];
-       extern const char setmsg[], showmsg[], typemsg1[];
+       extern const char createmsg[], destroymsg[], headermsg[], labelmsg1[];
+       extern const char labelmsg2[], labelmsg3[], migratemsg[], recovermsg[];
+       extern const char removemsg1[], removemsg2[], resizemsg[];
+       extern const char resizediskmsg[], setmsg[], showmsg[], typemsg1[];
        extern const char typemsg2[], typemsg3[], unsetmsg[];
 #ifndef HAVE_NBTOOL_CONFIG_H
        extern const char backupmsg[], restoremsg[];
@@ -615,13 +616,14 @@
            "       %s\n"
            "       %s\n"
            "       %s\n"
+           "       %s\n"
            "       %s\n",
            addmsg1, addmsg2,
 #ifndef HAVE_NBTOOL_CONFIG_H
            backupmsg,
 #endif
            biosbootmsg, createmsg, destroymsg,
-           labelmsg1, labelmsg2, labelmsg3,
+           headermsg, labelmsg1, labelmsg2, labelmsg3,
            migratemsg, recovermsg,
            removemsg1, removemsg2,
            resizemsg, resizediskmsg,
diff -r ff177de6a0b6 -r 7581cce40525 sbin/gpt/gpt.h
--- a/sbin/gpt/gpt.h    Tue Nov 03 02:04:12 2015 +0000
+++ b/sbin/gpt/gpt.h    Tue Nov 03 02:19:24 2015 +0000
@@ -82,6 +82,7 @@
 int    cmd_biosboot(int, char *[]);
 int    cmd_create(int, char *[]);
 int    cmd_destroy(int, char *[]);
+int    cmd_header(int, char *[]);
 int    cmd_label(int, char *[]);
 int    cmd_migrate(int, char *[]);
 int    cmd_recover(int, char *[]);
diff -r ff177de6a0b6 -r 7581cce40525 sbin/gpt/header.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sbin/gpt/header.c Tue Nov 03 02:19:24 2015 +0000
@@ -0,0 +1,145 @@
+/*-
+ * Copyright (c) 2015 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by John Nemeth
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+ */
+
+#if HAVE_NBTOOL_CONFIG_H
+#include "nbtool_config.h"
+#endif
+
+#include <sys/cdefs.h>
+#ifdef __RCSID
+__RCSID("$NetBSD: header.c,v 1.1 2015/11/03 02:19:24 jnemeth Exp $");
+#endif
+
+#include <sys/types.h>
+
+#include <err.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "map.h"
+#include "gpt.h"
+
+const char headermsg[] = "header device ...";
+
+__dead static void
+usage_header(void)
+{
+
+       fprintf(stderr,
+           "usage: %s %s\n", getprogname(), headermsg);
+       exit(1);
+}
+
+static void
+header(void)
+{
+       map_t *gpt;
+       struct gpt_hdr *hdr;
+       char buf[128];
+#ifdef HN_AUTOSCALE
+       char human_num[5];
+#endif
+
+#ifdef HN_AUTOSCALE
+       if (humanize_number(human_num, 5, mediasz,
+           "", HN_AUTOSCALE, HN_NOSPACE|HN_B) < 0)
+               human_num[0] = '\0';
+       if (human_num[0] != '\0')
+               printf("Media Size: %llu (%s)\n", (long long unsigned)mediasz,
+                   human_num);
+       else
+#endif
+               printf("Media Size: %llu\n", (long long unsigned)mediasz);
+
+       printf("Sector Size: %u\n", secsz);
+
+#ifdef HN_AUTOSCALE
+       if (humanize_number(human_num, 5, mediasz / secsz,
+           "", HN_AUTOSCALE, HN_NOSPACE|HN_B) < 0)
+               human_num[0] = '\0';
+       if (human_num[0] != '\0')
+               printf("Number of Sectors: %llu (%s)\n",
+                   (long long unsigned)(mediasz / secsz), human_num);
+       else
+#endif
+               printf("Number of Sectors: %llu\n",
+                   (long long unsigned)(mediasz / secsz));
+
+       printf("\nHeader Information:\n");
+
+       gpt = map_find(MAP_TYPE_PRI_GPT_HDR);
+       if (gpt == NULL) {
+               printf("- GPT Header not found\n");
+               return;
+       }
+
+       hdr = gpt->map_data;
+       printf("- GPT Revision: %u\n", hdr->hdr_revision);
+       printf("- First Data Sector: %llu\n",
+           (long long unsigned)hdr->hdr_lba_start);
+#ifdef HN_AUTOSCALE
+       if (humanize_number(human_num, 5, hdr->hdr_lba_end,
+           "", HN_AUTOSCALE, HN_NOSPACE|HN_B) < 0)
+               human_num[0] = '\0';
+       if (human_num[0] != '\0')
+               printf("- Last Data Sector: %llu (%s)\n",
+                   (long long unsigned)hdr->hdr_lba_end, human_num);
+       else
+#endif
+       printf("- Last Data Sector: %llu\n",
+           (long long unsigned)hdr->hdr_lba_end);
+       gpt_uuid_snprintf(buf, sizeof(buf), "%d", hdr->hdr_guid);
+       printf("- Media GUID: %s\n", buf);
+       printf("- Number of GPT Entries: %u\n", hdr->hdr_entries);
+}
+
+int
+cmd_header(int argc, char *argv[])
+{
+       int fd;
+
+       if (argc == optind)
+               usage_header();
+
+       while (optind < argc) {
+               fd = gpt_open(argv[optind++]);
+               if (fd == -1) {
+                       warn("unable to open device '%s'", device_name);
+                       continue;
+               }
+               header();
+
+               gpt_close(fd);
+       }
+
+       return (0);
+}