/*
**  DRVALID.C - validate disk drives
**
**  Original Copyright 1988-1991 by Bob Stout as part of
**  the MicroFirm Function Library (MFL)
**
**  This subset version is functionally identical to the
**  version originally published by the author in Tech Specialist
**  magazine and is hereby donated to the public domain.
**
**  Uses ABSDISKC.C and ABSDISK.ASM in SNIPPETS.
*/

#include <dos.h>
#include <stdlib.h>

typedef enum {ERROR = -1, SUCCESS, FALSE = 0, TRUE} LOGICAL;

/*
**  Function to read an absolute disk sector
*/

int AbsDiskRead(unsigned short, size_t, size_t, void *);

/*
**  getdrv()
**
**  Just as getcwd() returns the default directory, getdrv() returns
**  the current drive.
**
**  Arguments: None.
**
**  Returns:   Current drive (0 = A:, 1 = B:, etc.)
**
**  Side effects: none
*/

int getdrv(void)
{
      union REGS regs;

      regs.h.ah = 0x19;
      intdos(&regs, &regs);
      return (regs.h.al);
}

/*
**  chdrv()
**
**  Like chdir(), except changes drives rather than directories.
**
**  Arguments: 1 - target drive (0 = A:, 1 = B:, etc.)
**
**  Returns: SUCCESS or ERROR
**
**  Side effects: none
*/

LOGICAL chdrv(int drive)
{
      union REGS regs;

      regs.h.ah = 0x0e;
      regs.h.dl = (char)drive;
      intdos(&regs, &regs);
      if (drive != getdrv())
            return ERROR;
      else  return SUCCESS;
}

/*
**  drvalid()
**
**  Verifies whether a logical disk drive is available without
**  triggering the DOS critical error handler.
**
**  Arguments: 1 - target drive (0 = A;, 1 = B:, etc.)
**
**  Returns:   TRUE  - drive is valid
**             FALSE - drive is invalid
**
**  Side effects: none
*/

LOGICAL drvalid(int drive)
{
      int original, result;

      original = getdrv();
      result   = (SUCCESS == chdrv(drive));
      chdrv(original);
      return result;
}

/*
**  drvrdy()
**
**  Checks whether a drive with removable media is ready.
**
**  Arguments: 1 - target drive (0 = A;, 1 = B:, etc.)
**
**  Returns:   TRUE  - drive is ready
**             FALSE - drive is not ready
**             ERROR - other read error
**
**  Side effects: none
*/

LOGICAL drvrdy(int drive)
{
      int status;
      char buf[2048];         /* nice & roomy   */

      status = AbsDiskRead(drive, 1, 0, buf);
      if (0 == status)
            return TRUE;
      status &= 0xff;
      if (2 == status)
            return FALSE;
      else  return ERROR;
}

#ifdef TEST

#include <stdio.h>
#include <ctype.h>

int main(int argc, char *argv[])
{
      int drive;

      if (2 > argc)
      {
            puts("Usage: DRVALID drive[:]");
            return EXIT_FAILURE;
      }
      drive = toupper(*argv[1]);
      if (!isalpha(drive))
      {
            puts("Error: Invalid drive name");
            return EXIT_FAILURE;
      }
      printf("Drive %c: is %svalid\n", drive,
            drvalid(drive - 'A') ? "" : "not ");
      if (2 < _osmajor)
      {
            union REGS regs;

            regs.x.ax = 0x4408;
            regs.h.bl = (unsigned char)(drive - '@');
            intdos(&regs, &regs);
            printf("ioctl returned Cflag=%s\n",
                  regs.x.cflag ? "TRUE" : "FALSE");
            printf("ioctl returned AX=0x%X\n", regs.x.ax);
            printf("Drive %c is%s removable\n", drive,
                  regs.x.ax ? " not" : "");
            if (0 == regs.x.ax)
            {
                  printf("Drive %c is %sready\n", drive,
                        drvrdy(drive - 'A') ? "" : "not ");
            }
      }
      return EXIT_SUCCESS;
}

#endif /* TEST */
v class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='889711a03e0fba427fb85317900e93c74e3be02a'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>David S. Miller &lt;davem@davemloft.net&gt;</td><td class='right'>2017-02-01 12:46:17 -0500</td></tr>
<tr><th>committer</th><td>David S. Miller &lt;davem@davemloft.net&gt;</td><td class='right'>2017-02-01 12:46:17 -0500</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/image/microtek.c?h=nds-private-remove&amp;id=889711a03e0fba427fb85317900e93c74e3be02a'>889711a03e0fba427fb85317900e93c74e3be02a</a> (<a href='/cgit.cgi/linux/net-next.git/patch/drivers/usb/image/microtek.c?id=889711a03e0fba427fb85317900e93c74e3be02a'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=889711a03e0fba427fb85317900e93c74e3be02a'>05af2eda6502a95cf11935cce1e9b25a1340e7ca</a> /<a href='/cgit.cgi/linux/net-next.git/tree/drivers/usb/image/microtek.c?h=nds-private-remove&amp;id=889711a03e0fba427fb85317900e93c74e3be02a'>drivers/usb/image/microtek.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/image/microtek.c?h=nds-private-remove&amp;id=ff1176f6164f3d151ee64c05d3f7b6662a81b982'>ff1176f6164f3d151ee64c05d3f7b6662a81b982</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/image/microtek.c?h=nds-private-remove&amp;id=889711a03e0fba427fb85317900e93c74e3be02a&amp;id2=ff1176f6164f3d151ee64c05d3f7b6662a81b982'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/image/microtek.c?h=nds-private-remove&amp;id=7243a1af37a4dc9225004546d9d0756c529ad3ce'>7243a1af37a4dc9225004546d9d0756c529ad3ce</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/image/microtek.c?h=nds-private-remove&amp;id=889711a03e0fba427fb85317900e93c74e3be02a&amp;id2=7243a1af37a4dc9225004546d9d0756c529ad3ce'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge tag 'wireless-drivers-next-for-davem-2017-02-01' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-next</div><div class='commit-msg'>Kalle Valo says:

====================
wireless-drivers-next patches for 4.11

It's nice to see rt2x00 development has becoming active, for example
adding support for a new chip version. Also wcn36xx has been converted
to use the recently merged QCOM_SMD subsystem. Otherwise new features
and fixes it lots of drivers.

Major changes:

iwlwifi

* some more work in preparation for A000 family support
* add support for radiotap timestamps
* some work on our firmware debugging capabilities

wcn36xx

* convert to a proper QCOM_SMD driver (from the platform_driver interface)

ath10k

* VHT160 support
* dump Copy Engine registers during firmware crash
* search board file extension from SMBIOS

wil6210

* add disable_ap_sme module parameter

rt2x00

* support RT3352 with external PA
* support for RT3352 with 20MHz crystal
* add support for RT5350 WiSoC

brcmfmac

* add support for BCM43455 sdio device

rtl8xxxu

* add support for D-Link DWA-131 rev E1, TP-Link TL-WN822N v4 and others
====================

Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=889711a03e0fba427fb85317900e93c74e3be02a'>Diffstat</a> (limited to 'drivers/usb/image/microtek.c')</div><table summary='diffstat' class='diffstat'>