Debian bug report logs - #1708, boring messages

Message sent to debian-devel@pixar.com:

Subject: Bug#1708: `passwd' not interruptible when invoked by `adduser'
Reply-To: Ian Jackson <ian@chiark.chu.cam.ac.uk>, debian-bugs@pixar.com
Resent-From: Ian Jackson <ian@chiark.chu.cam.ac.uk>
Resent-To: debian-devel@pixar.com
Resent-Date: Fri, 20 Oct 1995 00:48:01 GMT
Resent-Message-ID: <debian-bugs-handler.1708.B10200046260@pixar.com>
Resent-Sender: iwj10@cus.cam.ac.uk
Message-Id: <m0t65Zy-0002YGC@chiark.chu.cam.ac.uk>
Date: Fri, 20 Oct 95 01:44 BST
From: Ian Jackson <ian@chiark.chu.cam.ac.uk>
To: Debian bugs submission address <debian-bugs@pixar.com>

Package: adduser? miscutils?
Version: adduser (1.94-1), miscutils (1.3-2)

If I run adduser, and then decide to abort after having been presented
with the password prompt, I can't do it with ^C.  passwd apparently
ignores ^C, and ^D simply produces another passwd prompt.  Presumably
I would have to type in a password twice to escape; instead, I used
another terminal and killed the adduser process.

Ian.

Message sent:

From: iwj10@thor.cam.ac.uk (Ian Jackson)
To: Ian Jackson <ian@chiark.chu.cam.ac.uk>
Subject: Bug#1708: Acknowledgement (was: `passwd' not interruptible when invoked by `adduser')
In-Reply-To: <m0t65Zy-0002YGC@chiark.chu.cam.ac.uk>
References: <m0t65Zy-0002YGC@chiark.chu.cam.ac.uk>

Thank you for the problem report you have sent regarding Debian GNU/Linux.
This is an automatically generated reply, to let you know your message has
been received.  It is being forwarded to the developers' mailing list for
their attention; they will reply in due course.

If you wish to submit further information on your problem, please send
it to debian-bugs@pixar.com, but please ensure that the Subject
line of your message starts with "Bug#1708" or "Re: Bug#1708" so that
we can identify it as relating to the same problem.

Please do not reply to the address at the top of this message,
unless you wish to report a problem with the bug-tracking system.

Ian Jackson
(maintainer, debian-bugs)

Message sent to debian-devel@pixar.com:

Subject: Bug#1708: passwd' not interruptible when invoked by `adduser'
Reply-To: joey@finlandia.Infodrom.North.DE (Martin Schulze), debian-bugs@pixar.com
Resent-From: joey@finlandia.Infodrom.North.DE (Martin Schulze)
Resent-To: debian-devel@pixar.com
Resent-Date: Sat, 21 Oct 1995 17:48:02 GMT
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Resent-Sender: iwj10@cus.cam.ac.uk
Message-Id: <m0t6dxl-000K0ZC@finlandia.Infodrom.North.DE>
From: joey@finlandia.Infodrom.North.DE (Martin Schulze)
To: ian@chiark.chu.cam.ac.uk
Date: Sat, 21 Oct 1995 14:27:49 +0100 (MET)
Cc: debian-bugs@Pixar.com
In-Reply-To: <m0t65Zy-0002YGC@chiark.chu.cam.ac.uk> from "Ian Jackson" at Oct 20, 95 01:44:00 am
Content-Type: text
Content-Length: 1968

Hello Ian Jackson!

}Package: adduser? miscutils?
}Version: adduser (1.94-1), miscutils (1.3-2)

No. libc.

}If I run adduser, and then decide to abort after having been presented
}with the password prompt, I can't do it with ^C.  passwd apparently
}ignores ^C, and ^D simply produces another passwd prompt.  Presumably
}I would have to type in a password twice to escape; instead, I used
}another terminal and killed the adduser process.

Because I have heavily modified the passwd program in the last days I
checked this report...

The reason is not in the adduser nor in the miscutils (or util-linux
where my passwd comes from). It's in the libc itself.

The passwd programm just makes a system call:

-- [passwd.c] --------------------------------------------------------
        pwdstr = getpass("Enter new password: ");
        if (pwdstr[0] == '\0') {
            puts("Password not changed.");
            exit(1);
        }
----------------------------------------------------------------------

Looking at the source of libc you'll find the code that is responsible
for disabling ^C:

-- [getpass.c] -------------------------------------------------------
        ttyb.c_lflag &= ~(ECHO|ISIG);
        ioctl(fileno(tty), TCSETS, &ttyb);
----------------------------------------------------------------------

The above code (from util-linux) will accept an empty password
(generated with ^D) - and won't change anything. For me this is a
correct behaviour - I can live with that.

I haven't looked at the passwd program that is used by Debian.

So far,

	Joey

--
   / Martin Schulze  *  joey@infodrom.north.de  *  26129 Oldenburg /
  / +49-441-777884  *  Login&Passwd: nuucp  *  Index: ~/ls-lR.gz  /
 /                            Erfahrung ist eine n|tzliche Sache /
/ Leider macht man sie immer erst kurz nachdem man sie brauchte /
----------------------------------------------------------------
30.10.95: Oldenburger Linux-Stammtisch, ab 20h im DaCapo

Message sent:

From: iwj10@thor.cam.ac.uk (Ian Jackson)
To: joey@finlandia.Infodrom.North.DE (Martin Schulze)
Subject: Bug#1708: Info received (was Bug#1708: `passwd' not interruptible when invoked by `adduser')
In-Reply-To: <m0t6dxl-000K0ZC@finlandia.Infodrom.North.DE>
References: <m0t6dxl-000K0ZC@finlandia.Infodrom.North.DE>

Thank you for the additional information you have supplied regarding
this problem report.  It has been forwarded to the developers to
accompany the original report.

If you wish to continue to submit further information on your problem,
please do the same thing again: send it to debian-bugs@pixar.com, ensuring
that the Subject line starts with "Bug#1708" or "Re: Bug#1708" so that
we can identify it as relating to the same problem.

Please do not reply to the address at the top of this message,
unless you wish to report a problem with the bug-tracking system.

Ian Jackson
(maintainer, debian-bugs)

Ian Jackson / iwj10@thor.cam.ac.uk, with the debian-bugs tracking mechanism

This page last modified 07:43:01 GMT Wed 01 Nov