Load sg3_utils-1.15 into trunk/.

git-svn-id: https://svn.bingwo.ca/repos/sg3_utils/trunk@55 6180dd3e-e324-4e3e-922d-17de1ae2f315

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diff --git a/archive/sdparm.8 b/archive/sdparm.8
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--- a/archive/sdparm.8
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-.TH SDPARM "8" "April 2005" "sg3_utils-1.14" SG3_UTILS
-.SH NAME
-sdparm \- fetch and potentially change SCSI disk parameters
-.SH SYNOPSIS
-.B sdparm
-[\fI--all\fR] [\fI--clear=<str>\fR] [\fI--defaults\fR] [\fI--dummy\fR]
-[\fI--enumerate\fR] [\fI--get=<str>\fR] [\fI--help\fR] [\fI--hex\fR]
-[\fI--inquiry\fR] [\fI--long\fR] [\fI--page=<pg>[,<spg>]\fR]
-[\fI--save\fR] [\fI--set=<str>\fR] [\fI--six\fR] [\fI--verbose\fR]
-[\fI--version\fR] \fI<scsi_disk>\fR
-.SH DESCRIPTION
-.\" Add any additional description here
-.PP
-This utility primarily fetches and potentially changes SCSI disk
-mode pages. Inquiry data including Vital Product Data (VPD) pages
-can also be displayed.
-.PP
-If no options (other than <scsi_disk>) are given then a selection of
-common mode page parameters for that device are listed. If the '--long'
-option is also given then the description of the parameters is placed
-on the right of each line. If the '--all' option is given then all
-known mode page parameters for that device are listed.
-.PP
-Although this utility is primarily designed for SCSI disks (or storage
-devices that appear to the OS as SCSI disks) many of the mode pages
-are in common with other SCSI devices. These include CD/DVD players
-that use the ATAPI transport, SCSI tapes drives and SCSI enclosures.
-.TP
---all | -a
-by default when mode pages are being displayed only a small number of
-parameters are shown. When this option is given, all recognised parameters
-are output. The default action is to output a relatively small number
-of parameters from different pages. When a specific (mode) page number
-is given with the "--page=" option the all the parameters of that
-page are output (irrespective of the setting of this option).
-.TP
---clear=<str> | -c <str>
-The <str> contains a comma separated list of parameter acronyms whose
-values are to be set to zero. See the parameters section below.
-.TP
---defaults | -D
-sets the given mode page (via '--page=' option) to its default values.
-To make the default mode page values also the saved mode page values
-use the '--save' option as well.
-.TP
---dummy | -d
-when set inhibits changes being written back to a mode page. Instead
-the mode data that would have been sent to a MODE SELECT command,
-is output in ASCII hex to the console.
-.TP
---enumerate | -e
-lists out the mode pages and parameters known by this utility. Ignores
-the <scsi_device> argument and most other options apart from the '--page='
-and '-all' options. If '--enumerate' is given without other options
-then the known mode pages are listed. If it is given with a page
-number then all known parameters (fields) in that mode page are
-listed. If '--enumerate' is given with the '-all' option then all
-mode pages followed by all parameters within those mode pages are
-listed. See listings section below.
-.TP
---get=<str> | -g <str>
-The <str> contains a comma separated list of parameter acronyms whose
-values are to be fetched to zero. See the parameters section below.
-The '--long' and '--hex' options effect the output format. Also if
-a value of "1" is given (e.g. '--get=WCE=1') only the current value
-is output.
-.TP
---help | -h
-output the usage message then exit.
-.TP
---hex | -H
-rather than trying to decode mode (or VPD) pages, print them out in
-hex. When used with the '-get=' option the corresponding current,
-changeable, default and saveable values are output in hex, prefixed
-by "0x" and space separated. If a value of "1" is given with
-the '--get=' option (e.g. '--get=WCE=1') then only the current value
-is output in hex, prefixed by "0x".
-.TP
---inquiry | -i
-output INQUIRY VPD pages. The default is to output mode pages.
-.TP
---long | -l
-output extra information. In the case of mode page parameters a
-description (with units if applicable) is output to the right if
-it is known.
-.TP
---page=<pg>[,<spg>] | -p <pg>[,<spg>]
-supply the page number and optionally the sub page number of the mode
-page to output. These numbers re interpreted as decimal unless
-prefixed with "0x". Alternatively a two letter abbreviation for
-a (mode) page can be given (e.g. "--page=ca" for the caching control
-mode page). See the '--enumerate' option for available abbreviations.
-.TP
---page=<str> | -p <str>
-alternatively a two letter acronym for a mode page can be given.
-The '--enumerate' option can be used to list the mode page
-acronyms.
-.TP
---save | -S
-when a mode page is being modified (by using the '--clear=' and/or '--set="
-options) then the default action is to only modify the current mode page.
-When this option is given the corresponding value(s) in the saved mode
-page is also changed. The next time the device is power cycled (or reset)
-the saved mode page values become (i.e. are copied to) the current mode
-page. See notes section below.
-.TP
---set=<str> | -s <str>
-The <str> contains a comma separated list of parameter acronyms whose
-values are to be set to (all) ones. Alternatively each acronym may be
-followed by "=<n>" where <n> is the value to set that parameter to.
-See the parameters section below.
-.TP
---six | -6
-The default action of this utility is to issue MODE SENSE and MODE
-SELECT SCSI commands with 10 byte cdbs. When this option is given the
-6 byte cdb variants are used.
-.TP
---verbose | -v
-increase the level of verbosity, (i.e. debug output).
-.TP
---version | -V
-print the version string and then exit.
-.SH PARAMETERS
-The '--clear=', '--get=' and '--set=" options can take a string argument
-which is a comma separated list of parameters. Each parameter can
-be either an acronym name or a <start_byte>:<start_bit>:<num_bits> triple
-Either form can optionally be followed by "=<val>". Acronyms (e.g.
-WCE for "write cache enable") that this utility supports can be viewed
-with the '--enumerate' option.  Alternatively the mode page parameters
-to be changed can be described in terms of a <start_byte> (origin 0)
-within the mode page, a <start_bit> (0 to 7 inclusive) and <num_bits> (1
-to 32 inclusive). The low level representation of the WCE bit (in
-the caching control mode page) is 2:2:1 . The <start_byte> and 
-the <val>  can optionally be given in hex (prefixed with "0x").
-.PP
-Both '--clear=' and '--set=" parameter lists can be given. The only
-difference is the value set in the absence of "=<val>". For '--clear='
-the default value is zero while for '--set' the default value is all
-ones (as many as <num_bits> permits).
-.PP
-When an acronym is given the mode page is imputed from that acronym (e.g.
-WCE is in the cache mode page). When only the start_byte:start_bit:num_bits
-representation is used then the '--page=' option must be given to establish
-which mode page is to be used. When multiple parameters are given, they
-must all be in the same mode page (except for '--get=').
-.SH LISTINGS
-When known mode pages are listed (via the '--enumerate' option) each
-line starts with a two letter acronym. This is followed by the page
-number (in hex prefixed by "0x") optionally followed by a comma and
-the subpage number. Finally the descriptive name of the mode
-page (i.e. as found in spc-3 or sbc-2) is output.
-.PP
-When known parameters (fields) of a mode page are listed each line
-starts with an acronym. This will match (or be an acronym for) the
-description for that field found in the draft standards. Next are
-three numbers, separated by colons, surrounded by brackets. These
-are the byte offset (in hex, prefixed by "0x") of the start of the
-field within the mode page; the starting bit (0 through 7 inclusive)
-and then the number of bits. The descriptive name of the
-parameter (field) is then given, with units where 
-applicable (e.g. "(ms)" means the units are milliseconds).
-.PP
-Mode parameters for which the num_bits is greater than 1 can be
-viewed as unsigned integers. Often 16 and 32 bit fields are set
-to 0xffff and 0xffffffff respectively (all ones) which usually
-has a special meaning (see drafts). In listings such values are
-represented by "-1" to save space (rather than their unsigned
-integer equivalents).
-.SH NOTES
-The SPC-3 draft (rev 22a) says that devices that implement no
-distinction between current and saved pages can return an
-error (ILLEGAL REQUEST, invalid field in cdb) if the SP bit (which
-corresponds to the '--save' option) is _not_ set. In such cases
-the '--save' option needs to be given.
-.PP
-If the '--save' option is given but the existing mode page indicates (via
-its PS bit) that the page is not savable, then this utility generates
-an error message. That message suggests to try again without the '--save'
-option. 
-.PP
-In the 2.4 series of Linux kernels the given device must be
-a SCSI generic (sg) device. In the 2.6 series block devices (e.g. disks
-and SCSI DVDs) can also be specified. For example "sdparm /dev/sda"
-will work in the 2.6 series kernels. From lk 2.6.6 other SCSI "char"
-device names may be used as well (e.g. "/dev/st0m").
-.SH EXAMPLES
-These examples assume a 2.6 series linux kernel. For the 2.4 series
-scsi generic (i.e. sg) device names would need to be used.
-To list the common (mode) parameters of a disk:
-.PP
-   sdparm /dev/sda
-.PP
-To see all parameters for the caching control mode page:
-.PP
-   sdparm --page=ca /dev/sda
-.PP
-To get the WCE values (current changeable default and saved) in hex:
-.PP
-   sdparm -g WCE -H /dev/sda
-.br
-0x01 0x00 0x01 0x01
-.PP
-To get the WCE current value in hex:
-.PP
-   sdparm -g WCE=1 -H /dev/sda
-.br
-0x01
-.PP
-To set the "write cache enable" bit in the current page:
-.PP
-   sdparm --set=WCE /dev/sda
-.PP
-To set the "write cache enable" bit in the current and saved page:
-.PP
-   sdparm --set=WCE --save /dev/sda
-.PP
-To set the "write cache enable" and clear "read cache disable":
-.PP
-   sdparm --set=WCE --clear=RCD --save /dev/sda
-.PP
-The previous example can also by written as:
-.PP
-   sdparm -s WCE=1,RCD=0 -S /dev/sda
-.PP
-To re-establish the manufacturer's defaults in the current and saved
-caching control mode page:
-.PP
-   sdparm --page=ca --defaults -save /dev/sda
-.PP
-If an ATAPI cd/dvd player is at /dev/hdc then its common (mode) parameters
-could be listed with:
-.PP
-   sdparm /dev/hdc
-.PP
-One disk vendor has a "performance mode" bit (PM) in the vendor specific
-unit attention mode page [0x0,0x0]. PM=0 is server mode (the default)
-while PM=1 is desktop mode. Desktop mode can be set (both current and
-saved) with: 
-.PP
-   sdparm --page=0 --set=2:7:1=1 --save /dev/sda
-.PP
-The resultant change can be viewed in hex with the '--hex' option as
-there are no acronyms for vendor extensions yet.
-.SH AUTHORS
-Written by Douglas Gilbert.
-.SH "REPORTING BUGS"
-Report bugs to <dgilbert at interlog dot com>.
-.SH COPYRIGHT
-Copyright \(co 2005 Douglas Gilbert
-.br
-This software is distributed under a FreeBSD license. There is NO
-warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-.SH "SEE ALSO"
-.B sg_modes(sg3_utils), sg_wr_mode(sg3_utils), sginfo(sg3_utils)
-.B sg_senddiag(sg3_utils), smartmontools(internet, sourceforge)
diff --git a/archive/sdparm.c b/archive/sdparm.c
deleted file mode 100644
index 6fa7f291..00000000
--- a/archive/sdparm.c
+++ /dev/null
@@ -1,1501 +0,0 @@
-/*
- * Copyright (c) 2005 Douglas Gilbert.
- * 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. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 <unistd.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-#include <getopt.h>
-#include <limits.h>
-#include <ctype.h>
-#include <sys/ioctl.h>
-#include <sys/types.h>
-#include "sg_include.h"
-#include "sg_lib.h"
-#include "sg_cmds.h"
-
-/* A utility program for the Linux OS SCSI subsystem.
- *
- * This utility fetches various parameters associated with a given
- * SCSI disk (or a disk that uses, or translates the SCSI command
- * set). In some cases these parameters can be changed.
- */
-
-static char * version_str = "0.90 20050411";
-
-#define ME "sdparm: "
-
-#define DEF_MODE_RESP_LEN 252
-#define RW_ERR_RECOVERY_MP 1
-#define DISCONNECT_MP 2
-#define V_ERR_RECOVERY_MP 7
-#define CACHING_MP 8
-#define CONTROL_MP 0xa
-#define POWER_MP 0x1a
-#define IEC_MP 0x1c
-#define PROT_SPEC_LU_MP 0x18
-#define PROT_SPEC_PORT_MP 0x19
-
-#define MODE_DATA_OVERHEAD 128
-#define EBUFF_SZ 256
-#define MAX_MP_IT_VAL 128
-#define MAX_MODE_DATA_LEN 2048
-
-
-static struct option long_options[] = {
-        {"six", 0, 0, '6'},
-        {"all", 0, 0, 'a'},
-        {"clear", 1, 0, 'c'},
-        {"defaults", 1, 0, 'D'},
-        {"dummy", 1, 0, 'd'},
-        {"enumerate", 0, 0, 'e'},
-        {"get", 1, 0, 'g'},
-        {"help", 0, 0, 'h'},
-        {"hex", 0, 0, 'H'},
-        {"inquiry", 0, 0, 'i'},
-        {"long", 0, 0, 'l'},
-        {"page", 1, 0, 'p'},
-        {"set", 1, 0, 's'},
-        {"save", 0, 0, 'S'},
-        {"verbose", 0, 0, 'v'},
-        {"version", 0, 0, 'V'},
-        {0, 0, 0, 0},
-};
-
-static void usage()
-{
-    fprintf(stderr, "Usage: "
-          "sdparm    [-all] [--clear=<str>] [--defaults] [-dummy] "
-          "[--enumerate]\n"
-          "                 [--get=<str>] [--help] [--hex] [--inquiry] "
-          "[--long]\n"
-          "                 [--page=<pg>] [--save] [--set=<str>] [--six] "
-          "[--verbose]\n"
-          "                 [--version] <scsi_disk>\n"
-          "  where:\n"
-          "      --all | -a            list all known parameters for given "
-          "disk\n"
-          "      --clear=<str> | -c <str>  clear (zero) parameter value(s)\n"
-          "      --defaults | -D       set a mode page to its default "
-          "values\n"
-          "      --dummy | -d          don't write back modified mode page\n"
-          "      --enumerate | -e      list known pages and parameters "
-          "(ignore disk)\n"
-          "      --get=<str> | -g <str>  get (fetch) parameter value(s)\n"
-          "      --help | -h           print out usage message\n"
-          "      --hex | -H            output in hex rather than name/value "
-          "pairs\n"
-          "      --inquiry | -i        output INQUIRY VPD page(s) (def mode "
-          "page(s))\n"
-          "      --long | -l           add description to parameter output\n"
-          "      --page=<pg> | -p <pg>  page ([,subpage]) number to output "
-          "(or change)\n"
-          "      --save | -S           place mode changes in saved page as "
-          "well\n"
-          "      --set=<str> | -s <str>  set parameter value(s)\n"
-          "      --six | -6            use 6 byte SCSI cdbs (def 10 byte)\n"
-          "      --verbose | -v        increase verbosity\n"
-          "      --version | -V        print version string and exit\n\n"
-          "View or change parameters of a SCSI disk\n"
-          );
-}
-
-struct values_name_t {
-    int value;
-    int subvalue;
-    const char * acron;
-    const char * name;
-};
-
-static struct values_name_t mode_nums_name[] = {
-    {CACHING_MP, 0, "ca", "Caching"},
-    {CONTROL_MP, 0, "co", "Control"},
-    {DISCONNECT_MP, 0, "dr", "Disconnect-reconnect"},
-    {IEC_MP, 0, "ie", "Informational exception control"},
-    {PROT_SPEC_LU_MP, 0, "pl", "Protocol specific logical unit"},
-    {POWER_MP, 0, "po", "Power condition"},
-    {PROT_SPEC_PORT_MP, 0, "pp", "Protocol specific port"},
-    {RW_ERR_RECOVERY_MP, 0, "rw", "Read write error recovery"},
-    {V_ERR_RECOVERY_MP, 0, "ve", "Verify error recovery"},
-};
-
-static int mode_nums_name_len =
-        (sizeof(mode_nums_name) / sizeof(mode_nums_name[0]));
-
-static void list_mps()
-{
-    int k;
-    const struct values_name_t * vnp;
-
-    for (k = 0, vnp = mode_nums_name; k < mode_nums_name_len; ++k, ++vnp) {
-        if (vnp->subvalue)
-            printf("  %-4s 0x%02x,0x%02x %s\n", vnp->acron, vnp->value,
-                   vnp->subvalue, vnp->name);
-        else
-            printf("  %-4s 0x%02x      %s\n", vnp->acron, vnp->value,
-                   vnp->name);
-    }
-}
-
-static const char * get_mode_name(int page_num, int subpage_num)
-{
-    int k;
-    const struct values_name_t * vnp;
-
-    for (k = 0, vnp = mode_nums_name; k < mode_nums_name_len; ++k, ++vnp) {
-        if ((page_num == vnp->value) && (subpage_num == vnp->subvalue))
-            return vnp->name;
-    }
-    return NULL;
-}
-
-static const struct values_name_t * find_mp_by_acron(const char * ap)
-{
-    int k;
-    const struct values_name_t * vnp;
-
-    for (k = 0, vnp = mode_nums_name; k < mode_nums_name_len; ++k, ++vnp) {
-        if (0 == strncmp(vnp->acron, ap, 2))
-            return vnp;
-    }
-    return NULL;
-}
-
-struct mode_page_item {
-    const char * acron;
-    int page_num;
-    int subpage_num;
-    int start_byte;
-    int start_bit;
-    int num_bits;
-    int common;
-    const char * description;
-};
-
-struct mode_page_it_val {
-    struct mode_page_item mpi;
-    int val;
-};
-
-struct mode_page_settings {
-    int page_num;
-    int subpage_num;
-    struct mode_page_it_val it_vals[MAX_MP_IT_VAL];
-    int num_it_vals;
-};
-
-
-static struct mode_page_item mitem_arr[] = {
-    {"AWRE", RW_ERR_RECOVERY_MP, 0, 2, 7, 1, 1,   /* [0x1] sbc2 */
-        "Automatic write reallocation enabled"},
-    {"ARRE", RW_ERR_RECOVERY_MP, 0, 2, 6, 1, 1,
-        "Automatic read reallocation enabled"},
-    {"TB", RW_ERR_RECOVERY_MP, 0, 2, 5, 1, 0,
-        "Transfer block"},
-    {"RC", RW_ERR_RECOVERY_MP, 0, 2, 4, 1, 0,
-        "Read continuous"},
-    {"EER", RW_ERR_RECOVERY_MP, 0, 2, 3, 1, 0,
-        "Enable early recover"},
-    {"PER", RW_ERR_RECOVERY_MP, 0, 2, 2, 1, 1,
-        "Post error"},
-    {"DTE", RW_ERR_RECOVERY_MP, 0, 2, 1, 1, 0,
-        "Data terminate on error"},
-    {"DCR", RW_ERR_RECOVERY_MP, 0, 2, 0, 1, 0,
-        "Disable correction"},
-    {"RRC", RW_ERR_RECOVERY_MP, 0, 3, 7, 8, 0,
-        "Read retry count"},
-    {"WRC", RW_ERR_RECOVERY_MP, 0, 8, 7, 8, 0,
-        "Write retry count"},
-    {"RTL", RW_ERR_RECOVERY_MP, 0, 10, 7, 16, 0,
-        "Recovery time limit (ms)"},
-
-    {"BITL", DISCONNECT_MP, 0, 4, 7, 16, 0,     /* [0x2] spc3,sas1 */
-        "Bus inactivity time limit (sas: 100us)"},
-    {"MCTL", DISCONNECT_MP, 0, 8, 7, 16, 0,
-        "Maximum connect time limit (sas: 100us)"},
-    {"MBS", DISCONNECT_MP, 0, 10, 7, 16, 0,
-        "Maximum burst size"},
-    {"FBS", DISCONNECT_MP, 0, 14, 7, 16, 0,
-        "First burst size"},
-
-    {"V_EER", V_ERR_RECOVERY_MP, 0, 2, 3, 1, 0,   /* [0x8] sbc2 */
-        "Enable early recover"},
-    {"V_PER", V_ERR_RECOVERY_MP, 0, 2, 2, 1, 0,
-        "Post error"},
-    {"V_DTE", V_ERR_RECOVERY_MP, 0, 2, 1, 1, 0,
-        "Data terminate on error"},
-    {"V_DCR", V_ERR_RECOVERY_MP, 0, 2, 0, 1, 0,
-        "Disable correction"},
-    {"V_RC", V_ERR_RECOVERY_MP, 0, 3, 7, 8, 0,
-        "Verify retry count"},
-    {"V_RTL", V_ERR_RECOVERY_MP, 0, 10, 7, 16, 0,
-        "Verify recovery time limit (ms)"},
-
-    {"IC", CACHING_MP, 0, 2, 7, 1, 0,    /* [0x8] sbc2 */
-        "Initiator control"},
-    {"ABPF", CACHING_MP, 0, 2, 6, 1, 0,
-        "Abort pre-fetch"},
-    {"CAP", CACHING_MP, 0, 2, 5, 1, 0,
-        "Caching analysis permitted"},
-    {"DISC", CACHING_MP, 0, 2, 4, 1, 0,
-        "Discontinuity"},
-    {"SIZE", CACHING_MP, 0, 2, 3, 1, 0,
-        "Size"},
-    {"WCE", CACHING_MP, 0, 2, 2, 1, 1,
-        "Write cache enable"},
-    {"MF", CACHING_MP, 0, 2, 1, 1, 0,
-        "Multiplication factor"},
-    {"RCD", CACHING_MP, 0, 2, 0, 1, 1,
-        "Read cache disable"},
-    {"DRRP", CACHING_MP, 0, 3, 7, 4, 0,
-        "Demand read retension prioriry"},
-    {"WRP", CACHING_MP, 0, 3, 3, 4, 0,
-        "Write retension prioriry"},
-    {"DPTL", CACHING_MP, 0, 4, 7, 16, 0,
-        "Disable pre-fetch transfer length"},
-    {"MIPF", CACHING_MP, 0, 6, 7, 16, 0,
-        "Minimum pre-fetch"},
-    {"MAPF", CACHING_MP, 0, 8, 7, 16, 0,
-        "Maximum pre-fetch"},
-    {"MAPFC", CACHING_MP, 0, 10, 7, 16, 0,
-        "Maximum pre-fetch ceiling"},
-    {"FSW", CACHING_MP, 0, 12, 7, 1, 0,
-        "Force sequential write"},
-    {"LBCSS", CACHING_MP, 0, 12, 5, 1, 0,
-        "Logical block cache segment size"},
-    {"DRA", CACHING_MP, 0, 12, 4, 1, 0,
-        "disable read ahead"},
-    {"NV_DIS", CACHING_MP, 0, 12, 0, 1, 0,
-        "Non-volatile cache disbale"},
-    {"NCS", CACHING_MP, 0, 13, 7, 8, 0,
-        "Number of cache segments"},
-    {"CSS", CACHING_MP, 0, 14, 7, 16, 0,
-        "Cache segment size"},
-
-    {"TST", CONTROL_MP, 0, 2, 7, 3, 0,    /* [0xa] spc3 */
-        "Task set type"},
-    {"TMF_ONLY", CONTROL_MP, 0, 2, 4, 1, 0,
-        "Task management functions only"},
-    {"D_SENSE", CONTROL_MP, 0, 2, 2, 1, 0,
-        "Descriptor format sense data"},
-    {"GLTSD", CONTROL_MP, 0, 2, 1, 1, 0,
-        "Global logging target save disable"},
-    {"RLEC", CONTROL_MP, 0, 2, 0, 1, 0,
-        "Report log exception condition"},
-    {"QAM", CONTROL_MP, 0, 3, 7, 4, 0,
-        "Queue algorithm modifier"},
-    {"QERR", CONTROL_MP, 0, 3, 2, 2, 0,
-        "Queue error management"},
-    {"RAC", CONTROL_MP, 0, 4, 6, 1, 0,
-        "Report a check"},
-    {"UA_INTLCK", CONTROL_MP, 0, 4, 5, 2, 0,
-        "Unit attention interlocks controls"},
-    {"SWP", CONTROL_MP, 0, 4, 3, 1, 1,
-        "Software write protect"},
-    {"ATO", CONTROL_MP, 0, 5, 7, 1, 0,
-        "Application tag owner"},
-    {"TAS", CONTROL_MP, 0, 5, 6, 1, 0,
-        "Task aborted status"},
-    {"AUTOLOAD", CONTROL_MP, 0, 5, 2, 3, 0,
-        "Autoload mode"},
-    {"BTP", CONTROL_MP, 0, 8, 7, 16, 0,
-        "Busy timeout period (100us)"},
-    {"ESTCT", CONTROL_MP, 0, 10, 7, 16, 0,
-        "Extended self test completion time (sec)"},
-
-    {"PID", PROT_SPEC_PORT_MP, 0, 2, 3, 4, 0,    /* [0x19] spc3 */
-        "Protocol identifier"},
-
-    {"LUPID", PROT_SPEC_LU_MP, 0, 2, 3, 4, 0,    /* [0x18] spc3 */
-        "Protocol identifier"},
-
-    {"IDLE", POWER_MP, 0, 3, 1, 1, 0,    /* [0x1a] spc3 */
-        "Idle timer active"},
-    {"STANDBY", POWER_MP, 0, 3, 0, 1, 0,
-        "Standby timer active"},
-    {"ICT", POWER_MP, 0, 4, 7, 32, 0,
-        "Idle condition timer (100 ms)"},
-    {"SCT", POWER_MP, 0, 8, 7, 32, 0,
-        "Standby condition timer (100 ms)"},
-
-    {"PERF", IEC_MP, 0, 2, 7, 1, 0,    /* [0x1c] spc3 */
-        "Performance"},
-    {"EBF", IEC_MP, 0, 2, 5, 1, 0,
-        "Enable background function"},
-    {"EWASC", IEC_MP, 0, 2, 4, 1, 1,
-        "Enable warning"},
-    {"DEXCPT", IEC_MP, 0, 2, 3, 1, 1,
-        "Disable exceptions"},
-    {"TEST", IEC_MP, 0, 2, 2, 1, 0,
-        "Test (simulate device failure"},
-    {"LOGERR", IEC_MP, 0, 2, 0, 1, 0,
-        "Log errors"},
-    {"MRIE", IEC_MP, 0, 3, 3, 4, 1,
-        "Method of reporting infomational exceptions"},
-    {"INTT", IEC_MP, 0, 4, 7, 32, 0,
-        "Interval timer (100 ms)"},
-    {"REPC", IEC_MP, 0, 8, 7, 32, 0,
-        "Report count"},
-};
-
-static int mitem_arr_len = (sizeof(mitem_arr) / sizeof(mitem_arr[0]));
-
-static void list_mitems(int pn, int spn)
-{
-    int k, t_pn, t_spn;
-    const struct mode_page_item * mpi;
-    const char * name;
-    int found = 0;
-
-    t_pn = -1;
-    t_spn = -1;
-    for (k = 0, mpi = mitem_arr; k < mitem_arr_len; ++k, ++mpi) {
-        if ((t_pn != mpi->page_num) || (t_spn != mpi->subpage_num)) {
-            t_pn = mpi->page_num;
-            t_spn = mpi->subpage_num;
-            if ((pn >= 0) && ((pn != t_pn) || (spn != t_spn)))
-                continue;
-            name = get_mode_name(t_pn, t_spn);
-            if (name) {
-                if (t_spn)
-                    printf("%s mode page [0x%x,0x%x]:\n", name, t_pn, t_spn);
-                else
-                    printf("%s mode page [0x%x]:\n", name, t_pn);
-            } else if (0 == t_spn)
-                printf("mode page 0x%x:\n", t_pn);
-            else
-                printf("mode page 0x%x,0x%x:\n", t_pn, t_spn);
-        } else {
-            if ((pn >= 0) && ((pn != t_pn) || (spn != t_spn)))
-                continue;
-        }
-        printf("  %-10s [0x%02x:%d:%-2d]  %s\n", mpi->acron, mpi->start_byte,
-               mpi->start_bit, mpi->num_bits, mpi->description);
-        found = 1;
-    }
-    if ((! found) && (pn >= 0)) {
-        name = get_mode_name(pn, spn);
-        if (name) {
-            if (spn)
-                printf("%s mode page [0x%x,0x%x]: no items found\n", name,
-                       pn, spn);
-            else
-                printf("%s mode page [0x%x]: no items found\n", name, pn);
-        } else if (0 == spn)
-            printf("mode page 0x%x: no items found\n", pn);
-        else
-            printf("mode page 0x%x,0x%x: no items found\n", pn, spn);
-    }
-}
-
-static const struct mode_page_item * find_mitem_by_acron(const char * ap, int * from)
-{
-    int k = 0;
-    const struct mode_page_item * mpi;
-
-    if (from) {
-        k = *from;
-        if (k < 0)
-            k = 0;
-    }
-    for (mpi = mitem_arr + k; k < mitem_arr_len; ++k, ++mpi) {
-        if (0 == strcmp(mpi->acron, ap))
-            break;
-    }
-    if (k >= mitem_arr_len) {
-        k = mitem_arr_len;
-        mpi = NULL;
-    }
-    if (from)
-        *from = k + 1;
-    return mpi;
-}
-
-static const char * scsi_ptype_strs[] = {
-    /* 0 */ "disk",
-    "tape",
-    "printer",
-    "processor",
-    "write once optical disk",
-    /* 5 */ "cd/dvd",
-    "scanner",
-    "optical memory device",
-    "medium changer",
-    "communications",
-    /* 0xa */ "graphics",
-    "graphics",
-    "storage array controller",
-    "enclosure services device",
-    "simplified direct access device",
-    "optical card reader/writer device",
-    /* 0x10 */ "bridge controller commands",
-    "object based storage",
-    "automation/driver interface",
-    "0x13", "0x14", "0x15", "0x16", "0x17", "0x18",
-    "0x19", "0x1a", "0x1b", "0x1c", "0x1d",
-    "well known logical unit",
-    "no physical device on this lu",
-};
-
-static unsigned int get_big_endian(const unsigned char * from, int start_bit,
-                                   int num_bits)
-{
-    unsigned int res;
-    int sbit_o1 = start_bit + 1;
-
-    res = (*from++ & ((1 << sbit_o1) - 1));
-    num_bits -= sbit_o1;
-    while (num_bits > 0) {
-        res <<= 8;
-        res |= *from++;
-        num_bits -= 8;
-    }
-    if (num_bits < 0)
-        res >>= (-num_bits);
-    return res;
-}
-
-static void set_big_endian(unsigned int val, unsigned char * to,
-                           int start_bit, int num_bits)
-{
-    int sbit_o1 = start_bit + 1;
-    int mask, num, k, x;
-
-    mask = (8 != sbit_o1) ? ((1 << sbit_o1) - 1) : 0xff;
-    k = start_bit - ((num_bits - 1) % 8);
-    if (0 != k)
-        val <<= ((k > 0) ? k : (8 + k));
-    num = (num_bits + 15 - sbit_o1) / 8;
-    for (k = 0; k < num; ++k) {
-        if ((sbit_o1 - num_bits) > 0)
-            mask &= ~((1 << (sbit_o1 - num_bits)) - 1);
-        if (k < (num - 1))
-            x = (val >> ((num - k - 1) * 8)) & 0xff;
-        else
-            x = val & 0xff;
-        to[k] = (to[k] & ~mask) | (x & mask); 
-        mask = 0xff;
-        num_bits -= sbit_o1;
-        sbit_o1 = 8;
-    }
-}
-
-static unsigned int mp_get_value(const struct mode_page_item *mpi,
-                                 const unsigned char * mp)
-{
-    return get_big_endian(mp + mpi->start_byte, mpi->start_bit,
-                          mpi->num_bits);
-}
-
-static unsigned int mp_get_value_check(const struct mode_page_item *mpi,
-                                       const unsigned char * mp,
-                                       int * all_set)
-{
-    unsigned int res;
-
-    res = get_big_endian(mp + mpi->start_byte, mpi->start_bit,
-                         mpi->num_bits);
-    if (all_set) {
-        if ((16 == mpi->num_bits) && (0xffff == res))
-            *all_set = 1;
-        else if ((32 == mpi->num_bits) && (0xffffffff == res))
-            *all_set = 1;
-        else
-            *all_set = 0;
-    }
-    return res;
-}
-
-static void mp_set_value(unsigned int val, struct mode_page_item *mpi,
-                         unsigned char * mp)
-{
-    set_big_endian(val, mp + mpi->start_byte, mpi->start_bit, mpi->num_bits);
-}
- 
-static void print_mp_entry(const char * pre, int smask,
-                           const struct mode_page_item *mpi,
-                           const unsigned char * cur_mp,
-                           const unsigned char * cha_mp,
-                           const unsigned char * def_mp,
-                           const unsigned char * sav_mp,
-                           int long_out)
-{
-    int sep = 0;
-    int all_set;
-    unsigned int u;
-    const char * acron;
-
-    all_set = 0;
-    acron = (mpi->acron ? mpi->acron : "");
-    u = mp_get_value_check(mpi, cur_mp, &all_set);
-    if (all_set)
-        printf("%s%-10s -1", pre, acron);
-    else
-        printf("%s%-10s %u", pre, acron, u);
-    if (smask & 0xe) {
-        printf("  [");
-        if (smask & 2) {
-            printf("Changeable: %s",
-                   (mp_get_value(mpi, cha_mp) ? "y" : "n"));
-            sep = 1;
-        }
-        if (smask & 4) {
-            all_set = 0;
-            u = mp_get_value_check(mpi, def_mp, &all_set);
-            if (all_set)
-                printf("%sdef: -1", (sep ? ", " : " "));
-            else
-                printf("%sdef: %u", (sep ? ", " : " "), u);
-            sep = 1;
-        }
-        if (smask & 8) {
-            all_set = 0;
-            u = mp_get_value_check(mpi, sav_mp, &all_set);
-            if (all_set)
-                printf("%ssaved: -1", (sep ? ", " : " "));
-            else
-                printf("%ssaved: %u", (sep ? ", " : " "), u);
-        }
-        printf("]");
-    }
-    if (long_out && mpi->description)
-        printf("  %s", mpi->description);
-    printf("\n");
-}
-
-static void print_mode_info(int sg_fd, int mode6, int pn, int spn, int all,
-                            int long_out, int hex, int verbose)
-{
-    int k, res, len, verb, smask, single, fetch;
-    const struct mode_page_item * mpi;
-    unsigned char cur_mp[DEF_MODE_RESP_LEN];
-    unsigned char cha_mp[DEF_MODE_RESP_LEN];
-    unsigned char def_mp[DEF_MODE_RESP_LEN];
-    unsigned char sav_mp[DEF_MODE_RESP_LEN];
-    const char * name;
-
-    verb = (verbose > 0) ? verbose - 1 : 0;
-    if (pn >= 0) {
-        single = 1;
-        fetch = 1;
-        for (k = 0, mpi = mitem_arr; k < mitem_arr_len; ++k, ++mpi) {
-            if ((pn == mpi->page_num) && (spn == mpi->subpage_num))
-                break;
-        }
-        if (k >= mitem_arr_len) {
-            if (verbose) {
-                if (0 == spn)
-                    printf("mode page 0x%x, attributes not found\n", pn);
-                else
-                    printf("mode page 0x%x,0x%x, attributes not found\n",
-                           pn, spn);
-            }
-            if (hex) {
-                k = 0;
-                mpi = mitem_arr;    /* trick to enter main loop once */
-            }
-        }
-    } else {
-        single = 0;
-        fetch = 0;
-        mpi = mitem_arr;
-        k = 0;
-    }
-    name = "";
-    smask = 0;
-    for (; k < mitem_arr_len; ++k, ++mpi, fetch = 0) {
-        if (0 == fetch) {
-            if (! (all || mpi->common))
-                continue;
-            if ((pn != mpi->page_num) || (spn != mpi->subpage_num)) {
-                if (single)
-                    break;
-                fetch = 1;
-                pn = mpi->page_num;
-                spn = mpi->subpage_num;
-            }
-        }
-        if (fetch) {
-            smask = 0;
-            res = sg_get_mode_page_types(sg_fd, mode6, pn, spn,
-                                         DEF_MODE_RESP_LEN, &smask, cur_mp,
-                                         cha_mp, def_mp, sav_mp, verb);
-            if (SG_LIB_CAT_INVALID_OP == res) {
-                if (mode6)
-                    fprintf(stderr, "6 byte MODE SENSE cdb not supported, "
-                            "try again without '-6' option\n");
-                else
-                    fprintf(stderr, "10 byte MODE SENSE cdb not supported, "
-                            "try again with '-6' option\n");
-                return;
-            }
-            if ((smask & 1)) {
-                name = get_mode_name(pn, spn);
-                if (name) {
-                    if (0 == spn)
-                        printf("%s mode page [0x%x]:\n", name, pn);
-                    else
-                        printf("%s mode page [0x%x,0x%x]:\n", name, pn, spn);
-                } else if (0 == spn)
-                    printf("mode page 0x%x:\n", pn);
-                else
-                    printf("mode page 0x%x,0x%x:\n", pn, spn);
-                if (hex) {
-                    if (cur_mp[0] & 0x40)
-                        len = (cur_mp[2] << 8) + cur_mp[3] + 4;
-                    else
-                        len = cur_mp[1] + 2;
-                    printf("    Current:\n");
-                    dStrHex((const char *)cur_mp, len, 1);
-                    if (smask & 2) {
-                        printf("    Changeable:\n");
-                        dStrHex((const char *)cha_mp, len, 1);
-                    }
-                    if (smask & 4) {
-                        printf("    Default:\n");
-                        dStrHex((const char *)def_mp, len, 1);
-                    }
-                    if (smask & 8) {
-                        printf("    Saved:\n");
-                        dStrHex((const char *)sav_mp, len, 1);
-                    }
-                }
-            } else {
-                if (verbose || single) {
-                    name = get_mode_name(pn, spn);
-                    if (name)
-                        printf(">> %s mode page not supported\n", name);
-                    else if (0 == spn)
-                        printf(">> mode page 0x%x not supported\n", pn);
-                    else
-                        printf(">> mode page 0x%x,0x%x not supported\n",
-                               pn, spn);
-                }
-            }
-        }
-        if (smask && (! hex))
-            print_mp_entry("  ", smask, mpi, cur_mp, cha_mp,
-                     def_mp, sav_mp, long_out);
-    }
-}
-
-static void get_mode_info(int sg_fd, int mode6,
-                          struct mode_page_settings * mps, int long_out,
-                          int hex, int verbose)
-{
-    int k, res, verb, smask, pn, spn;
-    unsigned int u, val;
-    const struct mode_page_item * mpi;
-    unsigned char cur_mp[DEF_MODE_RESP_LEN];
-    unsigned char cha_mp[DEF_MODE_RESP_LEN];
-    unsigned char def_mp[DEF_MODE_RESP_LEN];
-    unsigned char sav_mp[DEF_MODE_RESP_LEN];
-    const struct mode_page_it_val * ivp;
-
-    verb = (verbose > 0) ? verbose - 1 : 0;
-    for (k = 0, pn = 0, spn = 0; k < mps->num_it_vals; ++k) {
-        ivp = &mps->it_vals[k];
-        val = ivp->val;
-        mpi = &ivp->mpi;
-        if ((0 == k) || (pn != mpi->page_num) || (spn != mpi->subpage_num)) {
-            pn = mpi->page_num;
-            spn = mpi->subpage_num;
-            smask = 0;
-            switch (val) {
-            case 0:
-                res = sg_get_mode_page_types(sg_fd, mode6, pn, spn,
-                                             DEF_MODE_RESP_LEN, &smask,
-                                             cur_mp, cha_mp, def_mp, sav_mp,
-                                             verb);
-                break;
-            case 1:
-                res = sg_get_mode_page_types(sg_fd, mode6, pn, spn,
-                                             DEF_MODE_RESP_LEN, &smask,
-                                             cur_mp, NULL, NULL, NULL, verb);
-                break;
-            default:
-                if (mpi->acron)
-                    fprintf(stderr, "bad format 'val' given to %s\n",
-                            mpi->acron);
-                else
-                    fprintf(stderr, "bad format 'val' given to 0x%x:%d:%d\n",
-                            mpi->start_byte, mpi->start_bit, mpi->num_bits);
-                return;
-            }
-            if (SG_LIB_CAT_INVALID_OP == res) {
-                if (mode6)
-                    fprintf(stderr, "6 byte MODE SENSE cdb not supported, "
-                            "try again without '-6' option\n");
-                else
-                    fprintf(stderr, "10 byte MODE SENSE cdb not supported, "
-                            "try again with '-6' option\n");
-                return;
-            }
-        }
-        if (0 == val) {
-            if (hex) {
-                if (smask & 1) {
-                    u = mp_get_value(mpi, cur_mp);
-                    printf("0x%02x ", u);
-                } else
-                    printf("-    ");
-                if (smask & 2) {
-                    u = mp_get_value(mpi, cha_mp);
-                    printf("0x%02x ", u);
-                } else
-                    printf("-    ");
-                if (smask & 4) {
-                    u = mp_get_value(mpi, def_mp);
-                    printf("0x%02x ", u);
-                } else
-                    printf("-    ");
-                if (smask & 8) {
-                    u = mp_get_value(mpi, sav_mp);
-                    printf("0x%02x ", u);
-                } else
-                    printf("-    ");
-                printf("\n");
-            } else
-                print_mp_entry("", smask, mpi, cur_mp, cha_mp,
-                               def_mp, sav_mp, long_out);
-        } else if (1 == val) {
-            if (hex) {
-                if (smask & 1) {
-                    u = mp_get_value(mpi, cur_mp);
-                    printf("0x%02x ", u);
-                } else
-                    printf("-    ");
-                printf("\n");
-            } else
-                print_mp_entry("", smask, mpi, cur_mp, NULL,
-                               NULL, NULL, long_out);
-        }
-    }
-}
-
-/* Return of 0 -> success,
- * SG_LIB_CAT_INVALID_OP -> invalid opcode, SG_LIB_CAT_ILLEGAL_REQ ->
- * bad field in cdb, -1 -> other failure */
-static int change_mode_page(int sg_fd, int save, int mode_6,
-                            struct mode_page_settings * mps, int dummy,
-                            int verbose)
-{
-    int k, len, off, md_len, res;
-    char ebuff[EBUFF_SZ];
-    unsigned char mdpg[MAX_MODE_DATA_LEN];
-    struct mode_page_it_val * ivp;
-
-    len = MAX_MODE_DATA_LEN;
-    memset(mdpg, 0, len);
-    if (mode_6)
-        res = sg_ll_mode_sense6(sg_fd, 0 /* dbd */, 0 /*current */,
-                                mps->page_num, mps->subpage_num,
-                                mdpg, ((len > 252) ? 252 : len), 1,
-                                verbose);
-    else
-        res = sg_ll_mode_sense10(sg_fd, 0 /* llbaa */, 0 /* dbd */,
-                                 0 /* current */, mps->page_num,
-                                 mps->subpage_num, mdpg, len, 1, verbose);
-    if (0 != res) {
-        fprintf(stderr, "change_mode_page: failed fetching page: 0x%x,0x%x\n",
-                mps->page_num, mps->subpage_num);
-        return -1;
-    }
-    off = sg_mode_page_offset(mdpg, len, mode_6, ebuff, EBUFF_SZ);
-    if (off < 0) {
-        fprintf(stderr, "change_mode_page: page offset failed: %s\n", ebuff);
-        return -1;
-    }
-    if (mode_6)
-        md_len = mdpg[0] + 1;
-    else
-        md_len = (mdpg[0] << 8) + mdpg[1] + 2;
-    mdpg[0] = 0;        /* mode data length reserved for mode select */
-    if (! mode_6)
-        mdpg[1] = 0;    /* mode data length reserved for mode select */
-    if (md_len > len) {
-        fprintf(stderr, "change_mode_page: mode data length=%d exceeds "
-                "allocation length=%d\n", md_len, len);
-        return -1;
-    }
-
-    for (k = 0; k < mps->num_it_vals; ++k) {
-        ivp = &mps->it_vals[k];
-        mp_set_value(ivp->val, &ivp->mpi, mdpg + off);
-    }
-
-    if ((! (mdpg[off] & 0x80)) && save) {
-        fprintf(stderr, "change_mode_page: mode page indicates it is not "
-                "savable but\n    '--save' option given (try without "
-                "it)\n");
-        return -1;
-    }
-    mdpg[off] &= 0x7f;   /* mask out PS bit, reserved in mode select */
-    if (dummy) {
-        printf("Mode data that would have been written:\n");
-        dStrHex((const char *)mdpg, md_len, 1);
-        return 0;
-    }
-    if (verbose) {
-        printf("Mode data about to be written:\n");
-        dStrHex((const char *)mdpg, md_len, 1);
-    }
-    if (mode_6)
-        res = sg_ll_mode_select6(sg_fd, 1, save, mdpg, md_len, 1,
-                                 verbose);
-    else
-        res = sg_ll_mode_select10(sg_fd, 1, save, mdpg, md_len, 1,
-                                  verbose);
-    if (0 != res) {
-        fprintf(stderr, "change__mode_page: failed setting page: 0x%x,0x%x\n",
-                mps->page_num, mps->subpage_num);
-        return -1;
-    }
-    return 0;
-}
-
-/* Return of 0 -> success,
- * SG_LIB_CAT_INVALID_OP -> invalid opcode, SG_LIB_CAT_ILLEGAL_REQ ->
- * bad field in cdb, -1 -> other failure */
-static int set_mode_page(int sg_fd, int pn, int spn, int save, int mode_6,
-                         unsigned char * mode_pg, int mode_pg_len,
-                         int dummy, int verbose)
-{
-    int len, off, md_len;
-    unsigned char * mdp;
-    char ebuff[EBUFF_SZ];
-    int ret = -1;
-
-    len = mode_pg_len + MODE_DATA_OVERHEAD;
-    mdp = malloc(len);
-    if (NULL ==mdp) {
-        fprintf(stderr, "set_mode_page: malloc failed, out of memory\n");
-        return -1;
-    }
-    memset(mdp, 0, len);
-    if (mode_6)
-        ret = sg_ll_mode_sense6(sg_fd, 0 /* dbd */, 0 /*current */, pn,
-                                spn, mdp, ((len > 252) ? 252 : len), 1,
-                                verbose);
-    else
-        ret = sg_ll_mode_sense10(sg_fd, 0 /* llbaa */, 0 /* dbd */,
-                                 0 /* current */, pn, spn, mdp, len, 1,
-                                 verbose);
-    if (0 != ret) {
-        fprintf(stderr, "set_mode_page: failed fetching page: 0x%x,0x%x\n",
-                pn, spn);
-        goto err_out;
-    }
-    off = sg_mode_page_offset(mdp, len, mode_6, ebuff, EBUFF_SZ);
-    if (off < 0) {
-        fprintf(stderr, "set_mode_page: page offset failed: %s\n", ebuff);
-        ret = -1;
-        goto err_out;
-    }
-    if (mode_6)
-        md_len = mdp[0] + 1;
-    else
-        md_len = (mdp[0] << 8) + mdp[1] + 2;
-    mdp[0] = 0;        /* mode data length reserved for mode select */
-    if (! mode_6)
-        mdp[1] = 0;    /* mode data length reserved for mode select */
-    if (md_len > len) {
-        fprintf(stderr, "set_mode_page: mode data length=%d exceeds "
-                "allocation length=%d\n", md_len, len);
-        ret = -1;
-        goto err_out;
-    }
-    if ((md_len - off) > mode_pg_len) {
-        fprintf(stderr, "set_mode_page: mode length length=%d exceeds "
-                "new contents length=%d\n", md_len - off, mode_pg_len);
-        ret = -1;
-        goto err_out;
-    }
-    memcpy(mdp + off, mode_pg, md_len - off);
-    mdp[off] &= 0x7f;   /* mask out PS bit, reserved in mode select */
-    if (dummy) {
-        printf("Mode data that would have been written:\n");
-        dStrHex((const char *)mdp, md_len, 1);
-        ret = 0;
-        goto err_out;
-    }
-    if (verbose) {
-        printf("Mode data about to be written:\n");
-        dStrHex((const char *)mdp, md_len, 1);
-    }
-    if (mode_6)
-        ret = sg_ll_mode_select6(sg_fd, 1, save, mdp, md_len, 1,
-                                 verbose);
-    else
-        ret = sg_ll_mode_select10(sg_fd, 1, save, mdp, md_len, 1,
-                                  verbose);
-    if (0 != ret) {
-        fprintf(stderr, "set_mode_page: failed setting page: 0x%x,0x%x\n",
-                pn, spn);
-        goto err_out;
-    }
-
-err_out:
-    free(mdp);
-    return ret;
-}
-
-static int set_mp_defaults(int sg_fd, int pn, int spn, int saved,
-                           int mode_6, int dummy, int verbose)
-{
-    int smask, res, len;
-    unsigned char cur_mp[DEF_MODE_RESP_LEN];
-    unsigned char def_mp[DEF_MODE_RESP_LEN];
-    const char * name;
-
-
-    smask = 0;
-    res = sg_get_mode_page_types(sg_fd, mode_6, pn, spn, DEF_MODE_RESP_LEN,
-                                 &smask, cur_mp, NULL, def_mp, NULL,
-                                 verbose);
-    if (SG_LIB_CAT_INVALID_OP == res) {
-        if (mode_6)
-            fprintf(stderr, "6 byte MODE SENSE cdb not supported, "
-                    "try again without '-6' option\n");
-        else
-            fprintf(stderr, "10 byte MODE SENSE cdb not supported, "
-                    "try again with '-6' option\n");
-        return -1;
-    }
-    if ((smask & 1)) {
-        if ((smask & 4)) {
-            if (cur_mp[0] & 0x40)
-                len = (cur_mp[2] << 8) + cur_mp[3] + 4; /* spf set */
-            else
-                len = cur_mp[1] + 2; /* spf clear (not subpage) */
-            return set_mode_page(sg_fd, pn, spn, saved, mode_6, def_mp,
-                                 len, dummy, verbose);
-        }
-        else {
-            name = get_mode_name(pn, spn);
-            if (name)
-                printf(">> %s mode page (default) not supported\n", name);
-            else if (0 == spn)
-                printf(">> mode page 0x%x (default) not supported\n", pn);
-            else
-                printf(">> mode page 0x%x,0x%x (default) not supported\n",
-                       pn, spn);
-            return -1;
-        }
-    } else {
-        name = get_mode_name(pn, spn);
-        if (name)
-            printf(">> %s mode page not supported\n", name);
-        else if (0 == spn)
-            printf(">> mode page 0x%x not supported\n", pn);
-        else
-            printf(">> mode page 0x%x,0x%x not supported\n", pn, spn);
-        return -1;
-    }
-}
-
-/* Trying to decode multipliers as sg_get_num() [in sg_libs does] would
- * only confuse things here, so use this local trimmed version */
-static int get_num(const char * buf)
-{
-    int res;
-    int num;
-    unsigned int unum;
-
-    if ((NULL == buf) || ('\0' == buf[0]))
-        return -1;
-    if (('0' == buf[0]) && (('x' == buf[1]) || ('X' == buf[1]))) {
-        res = sscanf(buf + 2, "%x", &unum);
-        num = unum;
-    } else
-        res = sscanf(buf, "%d", &num);
-    if (1 == res)
-        return num;
-    else
-        return -1;
-}
-
-static int build_mp_settings(const char * arg,
-                             struct mode_page_settings * mps, int clear,
-                             int get)
-{
-    int len, b_sz, num, from, cont;
-    unsigned int u;
-    char buff[64];
-    char acron[64];
-    char vb[64];
-    const char * cp;
-    const char * ncp;
-    const char * ecp;
-    struct mode_page_it_val * ivp;
-    const struct mode_page_item * mpi;
-    const struct mode_page_item * prev_mpi;
-
-    b_sz = sizeof(buff) - 1;
-    cp = arg;
-    while (mps->num_it_vals < MAX_MP_IT_VAL) {
-        memset(buff, 0, sizeof(buff));
-        ivp = &mps->it_vals[mps->num_it_vals];
-        if ('\0' == *cp)
-            break;
-        ncp = strchr(cp, ',');
-        if (ncp) {
-            len = ncp - cp;
-            if (len <= 0) {
-                ++cp;
-                continue;
-            }
-            strncpy(buff, cp, (len < b_sz ? len : b_sz));
-        } else
-            strncpy(buff, cp, b_sz);
-        if (isalpha(buff[0])) {
-            ecp = strchr(buff, '=');
-            if (ecp) {
-                strncpy(acron, buff, ecp - buff);
-                acron[ecp - buff] = '\0';
-                strcpy(vb, ecp + 1);
-                if (0 == strcmp("-1", vb))
-                    ivp->val = -1;
-                else {
-                    ivp->val = get_num(vb);
-                    if (-1 == ivp->val) {
-                        fprintf(stderr, "build_mp_settings: unable to "
-                                "decode: %s value\n", buff);
-                        fprintf(stderr, "    expected: <acronym>[=<val>]\n");
-                        return -1;
-                    }
-                }
-            } else {
-                strcpy(acron, buff);
-                ivp->val = ((clear || get) ? 0 : -1);
-            }
-            from = 0;
-            cont = 0;
-            prev_mpi = NULL;
-            if (get) {
-                do {
-                    mpi = find_mitem_by_acron(acron, &from);
-                    if (NULL == mpi) {
-                        if (cont) {
-                            mpi = prev_mpi;
-                            break;
-                        } else
-                            fprintf(stderr, "build_mp_settings: couldn't "
-                                    "find acronym: %s\n", acron);
-                        return -1;
-                    }
-                    if (mps->page_num < 0) {
-                        mps->page_num = mpi->page_num;
-                        mps->subpage_num = mpi->subpage_num;
-                        break;
-                    }
-                    cont = 1;
-                    prev_mpi = mpi;
-                } while ((mps->page_num != mpi->page_num) ||
-                         (mps->subpage_num != mpi->subpage_num));
-            } else {
-                do {
-                    mpi = find_mitem_by_acron(acron, &from);
-                    if (NULL == mpi) {
-                        if (cont) {
-                            fprintf(stderr, "build_mp_settings: mode page "
-                                    "of acronym: %s [0x%x,0x%x] doesn't "
-                                    "match prior\n", acron,
-                                    prev_mpi->page_num,
-                                    prev_mpi->subpage_num);
-                            fprintf(stderr, "    mode page: 0x%x,0x%x\n",
-                                    mps->page_num, mps->subpage_num);
-                        } else
-                            fprintf(stderr, "build_mp_settings: couldn't "
-                                    "find acronym: %s\n", acron);
-                        return -1;
-                    }
-                    if (mps->page_num < 0) {
-                        mps->page_num = mpi->page_num;
-                        mps->subpage_num = mpi->subpage_num;
-                        break;
-                    }
-                    cont = 1;
-                    prev_mpi = mpi;
-                } while ((mps->page_num != mpi->page_num) ||
-                         (mps->subpage_num != mpi->subpage_num));
-            }
-            if (mpi->num_bits < 32)
-                ivp->val &= (1 << mpi->num_bits) - 1;
-            ivp->mpi = *mpi;    /* struct assignment */
-        } else {    /* expect "byte_off:bit_off:num_bits[=<val>]" */
-            if ((0 == strncmp("0x", buff, 2)) ||
-                (0 == strncmp("0X", buff, 2))) {
-                num = sscanf(buff + 2, "%x:%d:%d=%s", &u,
-                             &ivp->mpi.start_bit, &ivp->mpi.num_bits, vb);
-                ivp->mpi.start_byte = u;
-            } else
-                num = sscanf(buff, "%d:%d:%d=%s", &ivp->mpi.start_byte,
-                             &ivp->mpi.start_bit, &ivp->mpi.num_bits, vb);
-            if (num < 3) {
-                fprintf(stderr, "build_mp_settings: unable to decode: %s\n",
-                        buff);
-                fprintf(stderr, "    expected: byte_off:bit_off:num_bits[="
-                        "<val>]\n");
-                return -1;
-            }
-            if (3 == num)
-                ivp->val = ((clear || get) ? 0 : -1);
-            else {
-                if (0 == strcmp("-1", vb))
-                    ivp->val = -1;
-                else {
-                    ivp->val = get_num(vb);
-                    if (-1 == ivp->val) {
-                        fprintf(stderr, "build_mp_settings: unable to "
-                                "decode byte_off:bit_off:num_bits value\n");
-                        return -1;
-                    }
-                }
-            }
-            if (ivp->mpi.start_byte < 0) {
-                fprintf(stderr, "build_mp_settings: need positive start "
-                        "byte offset\n");
-                return -1;
-            }
-            if ((ivp->mpi.start_bit < 0) || (ivp->mpi.start_bit > 7)) {
-                fprintf(stderr, "build_mp_settings: need start bit in "
-                        "0..7 range (inclusive)\n");
-                return -1;
-            }
-            if ((ivp->mpi.num_bits < 1) || (ivp->mpi.num_bits > 32)) {
-                fprintf(stderr, "build_mp_settings: need number of bits in "
-                        "1..32 range (inclusive)\n");
-                return -1;
-            }
-            if (mps->page_num < 0) {
-                fprintf(stderr, "build_mp_settings: need '--page=' option "
-                        "for mode page number\n");
-                return -1;
-            } else if (get) {
-                ivp->mpi.page_num = mps->page_num;
-                ivp->mpi.subpage_num = mps->subpage_num;
-            }
-            if (ivp->mpi.num_bits < 32)
-                ivp->val &= (1 << ivp->mpi.num_bits) - 1;
-        }
-        ++mps->num_it_vals;
-        if (ncp)
-            cp = ncp + 1;
-        else
-            break;
-    }
-    return 0;
-}
-
-int main(int argc, char * argv[])
-{
-    int sg_fd, res, c, pdt, flags;
-    int six_byte_cdb = 0;
-    int all = 0;
-    const char * clear_str = NULL;
-    const char * get_str = NULL;
-    const char * set_str = NULL;
-    int defaults = 0;
-    int dummy = 0;
-    int enumerate = 0;
-    int hex = 0;
-    int inquiry = 0;
-    int long_out = 0;
-    int saved = 0;
-    int verbose = 0;
-    char device_name[256];
-    int pn = -1;
-    int spn = -1;
-    int rw = 0;
-    struct sg_simple_inquiry_resp sir;
-    const struct values_name_t * vnp;
-    struct mode_page_settings mp_settings; 
-    char * cp;
-    int ret = 1;
-
-    memset(device_name, 0, sizeof(device_name));
-    memset(&mp_settings, 0, sizeof(mp_settings));
-    while (1) {
-        int option_index = 0;
-
-        c = getopt_long(argc, argv, "6ac:Ddeg:hHilp:s:SvV", long_options,
-                        &option_index);
-        if (c == -1)
-            break;
-
-        switch (c) {
-        case '6':
-            six_byte_cdb = 1;
-            break;
-        case 'a':
-            all = 1;
-            break;
-        case 'c':
-            clear_str = optarg;
-            rw = 1;
-            break;
-        case 'd':
-            dummy = 1;
-            break;
-        case 'D':
-            defaults = 1;
-            rw = 1;
-            break;
-        case 'e':
-            enumerate = 1;
-            break;
-        case 'g':
-            get_str = optarg;
-            break;
-        case 'h':
-        case '?':
-            usage();
-            return 0;
-        case 'H':
-            hex = 1;
-            break;
-        case 'i':
-            inquiry = 1;
-            break;
-        case 'l':
-            long_out = 1;
-            break;
-        case 'p':
-            if (isalpha(optarg[0])) {
-                vnp = find_mp_by_acron(optarg);
-                if (NULL == vnp) {
-                    fprintf(stderr, "mode page acronym not found\n");
-                    return 1;
-                }
-                pn = vnp->value;
-                spn = vnp->subvalue;
-            } else {
-                cp = strchr(optarg, ',');
-                pn = get_num(optarg);
-                if ((pn < 0) || (pn > 255)) {
-                    fprintf(stderr, "Bad page code value after '-p' "
-                            "switch\n");
-                    return 1;
-                }
-                if (cp) {
-                    spn = get_num(cp + 1);
-                    if ((spn < 0) || (spn > 255)) {
-                        fprintf(stderr, "Bad page code value after "
-                                "'-p' switch\n");
-                        return 1;
-                    }
-                } else
-                    spn = 0;
-            }
-            break;
-        case 's':
-            set_str = optarg;
-            rw = 1;
-            break;
-        case 'S':
-            saved = 1;
-            rw = 1;
-            break;
-        case 'v':
-            ++verbose;
-            break;
-        case 'V':
-            fprintf(stderr, ME "version: %s\n", version_str);
-            return 0;
-        default:
-            fprintf(stderr, "unrecognised switch code 0x%x ??\n", c);
-            usage();
-            return 1;
-        }
-    }
-    if (optind < argc) {
-        if ('\0' == device_name[0]) {
-            strncpy(device_name, argv[optind], sizeof(device_name) - 1);
-            device_name[sizeof(device_name) - 1] = '\0';
-            ++optind;
-        }
-        if (optind < argc) {
-            for (; optind < argc; ++optind)
-                fprintf(stderr, "Unexpected extra argument: %s\n",
-                        argv[optind]);
-            usage();
-            return 1;
-        }
-    }
-/* think about --get= with --enumerate */
-    if (pn < 0) {
-        mp_settings.page_num = -1;
-        mp_settings.subpage_num = -1;
-    } else {
-        mp_settings.page_num = pn;
-        mp_settings.subpage_num = spn;
-    }
-    if (get_str) {
-        if (set_str || clear_str) {
-            fprintf(stderr, "'--get=' can't be used with '--set=' or "
-                    "'--clear='\n");
-            return 1;
-        }
-        if (build_mp_settings(get_str, &mp_settings, 0, 1))
-            return 1;
-    }
-    if (enumerate) {
-        if (device_name[0] || set_str || clear_str || get_str || saved)
-            printf("Most option including <scsi_disk> are ignored when "
-                   "'--enumerate' is given\n");
-        if (pn < 0) {
-            printf("Mode pages:\n");
-            list_mps();
-        }
-        if (all || (pn >= 0))
-            list_mitems(pn, spn);
-        return 0;
-    }
-    if (0 == device_name[0]) {
-        fprintf(stderr, "missing device name!\n");
-        usage();
-        return 1;
-    }
-
-    if (inquiry) {
-        fprintf(stderr, "INQUIRY VPD pages not supported yet\n");
-        return 1;
-    }
-    if (defaults && (set_str || clear_str || get_str)) {
-        fprintf(stderr, "'--get=', '--set=' or '--clear=' can't be used "
-                "with '--defaults'\n");
-        return 1;
-    }
-
-    if (set_str) {
-        if (build_mp_settings(set_str, &mp_settings, 0, 0))
-            return 1;
-    }
-    if (clear_str) {
-        if (build_mp_settings(clear_str, &mp_settings, 1, 0))
-            return 1;
-    }
-
-    if (verbose && (mp_settings.num_it_vals > 0)) {
-        struct mode_page_it_val * ivp;
-        int k;
-
-        printf("mp_settings: page,subpage=0x%x,0x%x  num=%d\n",
-               mp_settings.page_num, mp_settings.subpage_num,
-               mp_settings.num_it_vals);
-        for (k = 0; k < mp_settings.num_it_vals; ++k) {
-            ivp = &mp_settings.it_vals[k];
-            if (get_str)
-                printf("  [0x%x,0x%x]  byte_off=0x%x, bit_off=%d, num_bits"
-                       "=%d  val=%d  acronym: %s\n", ivp->mpi.page_num,
-                       ivp->mpi.subpage_num, ivp->mpi.start_byte,
-                       ivp->mpi.start_bit, ivp->mpi.num_bits, ivp->val,
-                       (ivp->mpi.acron ? ivp->mpi.acron : ""));
-            else
-                printf("  byte_off=0x%x, bit_off=%d, num_bits=%d "
-                       " val=%d  acronym: %s\n", ivp->mpi.start_byte,
-                       ivp->mpi.start_bit, ivp->mpi.num_bits, ivp->val,
-                       (ivp->mpi.acron ? ivp->mpi.acron : ""));
-        }
-    }
-
-    if (defaults && (pn < 0)) {
-        fprintf(stderr, "to set defaults, the '--page=' option must "
-                "be used\n");
-        return 1;
-    }
-
-    flags = (O_NONBLOCK | (rw ? O_RDWR : O_RDONLY));
-    sg_fd = open(device_name, flags);
-    if (sg_fd < 0) {
-        fprintf(stderr, ME "open error: %s, flags=0x%x: ", device_name,
-                flags);
-        perror("");
-        return 1;
-    } 
-
-    if (sg_simple_inquiry(sg_fd, &sir, 0, verbose)) {
-        fprintf(stderr, "SCSI INQUIRY command failed on %s\n", device_name);
-        goto err_out;
-    }
-    pdt = sir.peripheral_type;
-    if (0 == hex) {
-        printf("    %s: %.8s  %.16s  %.4s",
-               device_name, sir.vendor, sir.product, sir.revision);
-        if (0 != pdt)
-            printf("  [pdt=%d]", pdt);
-        printf("\n");
-        if (! ((0 == pdt) || (4 == pdt) || (7 == pdt) || (0xe == pdt))) {
-            fprintf(stderr, "        expected disk device type, got %s\n",
-                    scsi_ptype_strs[pdt]);
-        }
-    }
-
-    if ((pn > 0x3e) || (spn > 0xfe)) {
-        fprintf(stderr, "Allowable mode page numbers are 0 to 62\n");
-        fprintf(stderr, "  Allowable mode subpage numbers are 0 to 254\n");
-        goto err_out;
-    }
-    if (defaults) {
-        res = set_mp_defaults(sg_fd, pn, spn, saved, six_byte_cdb, dummy,
-                              verbose);
-        if (0 != res)
-            goto err_out;
-    } else if (set_str || clear_str) {
-        if (mp_settings.num_it_vals < 1) {
-            fprintf(stderr, "no parameters found to set or clear\n");
-            goto err_out;
-        }
-        res = change_mode_page(sg_fd, saved, six_byte_cdb, &mp_settings,
-                               dummy, verbose);
-        if (0 != res)
-            goto err_out;
-    } else if (get_str) {
-        if (mp_settings.num_it_vals < 1) {
-            fprintf(stderr, "no parameters found to get\n");
-            goto err_out;
-        }
-        get_mode_info(sg_fd, six_byte_cdb, &mp_settings, long_out, hex,
-                      verbose);
-    } else
-        print_mode_info(sg_fd, six_byte_cdb, pn, spn, ((pn >= 0) ? 1 : all),
-                        long_out, hex, verbose);
-    ret = 0;
-
-err_out:
-    res = close(sg_fd);
-    if (res < 0) {
-        perror(ME "close error");
-        return 1;
-    }
-    return ret;
-}