GNU screen and tmux cannot read tty input if they are started in a telnet session

GNU screen and tmux cannot read tty input if they are started in a telnet session

[Takashi Yano]

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Hello,

I would like to propose a patch attached for login package.

This fixes the issue that GNU screen and tmux cannot read tty input
if they are started in a telnet session.

This issue is due to the ownership of tty. With login 1.12-1, tty
is owned by cyg_server after logging in via telnet. This results
in freeze of GNU screen and tmux.

-- 
Takashi Yano <takashi.yano@nifty.ne.jp>

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From f652446932eac5811f0ae82d12c69a77fb2b959f Mon Sep 17 00:00:00 2001
From: Takashi Yano <takashi.yano@nifty.ne.jp>
Date: Sat, 9 Mar 2019 10:11:54 +0900
Subject: [PATCH] Fix the issue that GNU screen and tmux cannot read tty input
 if they are started in a telnet session.

* login.c (main): Add chown() and chmod() to change the ownership
and the permissions of tty.
---
 login.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/login.c b/login.c
index 271d5e8..918f228 100644
--- a/login.c
+++ b/login.c
@@ -280,6 +280,8 @@ main (int argc, char **argv)
 	  sleep ((u_int) ((cnt - 3) * 5));
 	}
     }
+  chown (ttyn, pwd->pw_uid, pwd->pw_gid);
+  chmod (ttyn, 0600);
 
   /* committed to login -- turn off timeout */
   (void) alarm ((u_int) 0);
-- 
2.17.0


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Problem of login (Re: GNU screen and tmux cannot read tty input if they are started in a telnet session)

[Takashi Yano]

I try to clarify the title a little.

On Sat, 9 Mar 2019 10:35:13 +0900 Takashi Yano wrote:
> Hello,
> 
> I would like to propose a patch attached for login package.
> 
> This fixes the issue that GNU screen and tmux cannot read tty input
> if they are started in a telnet session.
> 
> This issue is due to the ownership of tty. With login 1.12-1, tty
> is owned by cyg_server after logging in via telnet. This results
> in freeze of GNU screen and tmux.

-- 
Takashi Yano <takashi.yano@nifty.ne.jp>

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Re: Problem of login (Re: GNU screen and tmux cannot read tty input if they are started in a telnet session)

[Takashi Yano]

Hi Corinna and Yaakov,

I know you are busy, but could you please have a look?

On Sun, 10 Mar 2019 15:05:48 +0900 Takashi Yano wrote:
> I try to clarify the title a little.
> 
> On Sat, 9 Mar 2019 10:35:13 +0900 Takashi Yano wrote:
> > Hello,
> > 
> > I would like to propose a patch attached for login package.
> > 
> > This fixes the issue that GNU screen and tmux cannot read tty input
> > if they are started in a telnet session.
> > 
> > This issue is due to the ownership of tty. With login 1.12-1, tty
> > is owned by cyg_server after logging in via telnet. This results
> > in freeze of GNU screen and tmux.

-- 
Takashi Yano <takashi.yano@nifty.ne.jp>

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Re: Problem of login (Re: GNU screen and tmux cannot read tty input if they are started in a telnet session)

[Corinna Vinschen]

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On Mar 16 22:06, Takashi Yano wrote:
> Hi Corinna and Yaakov,
> 
> I know you are busy, but could you please have a look?
> 
> On Sun, 10 Mar 2019 15:05:48 +0900 Takashi Yano wrote:
> > I try to clarify the title a little.
> > 
> > On Sat, 9 Mar 2019 10:35:13 +0900 Takashi Yano wrote:
> > > Hello,
> > > 
> > > I would like to propose a patch attached for login package.
> > > 
> > > This fixes the issue that GNU screen and tmux cannot read tty input
> > > if they are started in a telnet session.
> > > 
> > > This issue is due to the ownership of tty. With login 1.12-1, tty
> > > is owned by cyg_server after logging in via telnet. This results
> > > in freeze of GNU screen and tmux.

Pushed and new release uploaded.

Thanks,
Corinna

-- 
Corinna Vinschen
Cygwin Maintainer

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Re: Problem of login (Re: GNU screen and tmux cannot read tty input if they are started in a telnet session)

[Takashi Yano]

Hi Corinna,

On Sat, 16 Mar 2019 16:34:41 +0100 Corinna Vinschen wrote:
> Pushed and new release uploaded.

I confirmed that the issue has been fixed in login 1.13-1.
Thank you very much!

-- 
Takashi Yano <takashi.yano@nifty.ne.jp>

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