Starting screen detached with noncanonical mode input processing

[Leland Wang]

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Hi,

Recently I encountered a problem about starting screen detached with
noncanonical mode input processing. For example, if I have the following
icanon.c:

#include <stdio.h>
#include <termios.h>

int main(void)
{
    struct termios t;

    tcgetattr(0, &t);
    t.c_lflag &= ~ICANON;
    tcsetattr(0, TCSANOW, &t);
    while (getchar() != EOF)
        ;
    return 0;
}

and...

$ gcc icanon.c
$ screen ./a.out

then there is no problem. However, if I

$ screen -d -m ./a.out
$

a.out and screen terminate immediately because a.out gets EOF when
getchar(). I need to start screen detached and use noncanonical mode
because tip(1) uses noncanonical mode. I need to monitor a number of
serial consoles as soon as my server boots. Do anyone have any idea
how to remedy this problem?

Regards,
Leland Wang

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    | |       / /\ \    \--\ /---/ /\
/---/ \---\/-/ /  \ \---\  | \----/ |
\---------/\--/    \----/  \--------/
  e-mail address: address@hidden
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