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Add TIOCGWINSZ ioctl so userland can determine terminal geometry.

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(Don't) use this to implement short-form output in ls.
I'm too tired to make a nice column formatting algorithm.
I just wanted something concise when I type "ls".
This commit is contained in:
Andreas Kling 2018-11-29 03:45:23 +01:00
parent f5a83c4d8a
commit ac7a60225e
11 changed files with 208 additions and 63 deletions
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14
Kernel/TTY.cpp
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@ -109,6 +109,7 @@ int TTY::ioctl(Process& process, unsigned request, unsigned arg)
{
pid_t pgid;
Unix::termios* tp;
Unix::winsize* ws;
if (process.tty() != this)
return -ENOTTY;
@ -136,7 +137,20 @@ int TTY::ioctl(Process& process, unsigned request, unsigned arg)
return -EFAULT;
set_termios(*tp);
return 0;
case TIOCGWINSZ:
ws = reinterpret_cast<Unix::winsize*>(arg);
if (!process.validate_write(ws, sizeof(Unix::winsize)))
return -EFAULT;
ws->ws_row = m_rows;
ws->ws_col = m_columns;
return 0;
}
ASSERT_NOT_REACHED();
return -EINVAL;
}
void TTY::set_size(unsigned short columns, unsigned short rows)
{
m_rows = rows;
m_columns = columns;
}