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Cygwin: console: Fix ioctl() FIONREAD. 

- ioctl() FIONREAD for console does not return correct value since
  commit cfb517f39a. This patch fixes
  the issue.
This commit is contained in:
Takashi Yano 2020-02-18 13:05:07 +09:00 committed by Ken Brown
parent fe86a2418d
commit bb87c87f52
1 changed files with 33 additions and 4 deletions
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37
winsup/cygwin/fhandler_console.cc
View File

@ -1230,10 +1230,39 @@ fhandler_console::ioctl (unsigned int cmd, void *arg)
release_output_mutex ();
return -1;
}
while (n-- > 0)
if (inp[n].EventType == KEY_EVENT && inp[n].Event.KeyEvent.bKeyDown)
++ret;
*(int *) arg = ret;
bool saw_eol = false;
for (DWORD i=0; i<n; i++)
if (inp[i].EventType == KEY_EVENT &&
inp[i].Event.KeyEvent.bKeyDown &&
inp[i].Event.KeyEvent.uChar.UnicodeChar)
{
WCHAR wc = inp[i].Event.KeyEvent.uChar.UnicodeChar;
char mbs[8];
int len = con.con_to_str (mbs, sizeof (mbs), wc);
if ((get_ttyp ()->ti.c_lflag & ICANON) &&
len == 1 && CCEQ (get_ttyp ()->ti.c_cc[VEOF], mbs[0]))
{
saw_eol = true;
break;
}
ret += len;
const char eols[] = {
'\n',
'\r',
(char) get_ttyp ()->ti.c_cc[VEOL],
(char) get_ttyp ()->ti.c_cc[VEOL2]
};
if ((get_ttyp ()->ti.c_lflag & ICANON) &&
len == 1 && memchr (eols, mbs[0], sizeof (eols)))
{
saw_eol = true;
break;
}
}
if ((get_ttyp ()->ti.c_lflag & ICANON) && !saw_eol)
*(int *) arg = 0;
else
*(int *) arg = ret;
release_output_mutex ();
return 0;
}