Date: Sun, 24 Jan 2010 22:53:47 -0500 From: jhell <jhell@DataIX.net> To: Glen Barber <glen.j.barber@gmail.com> Cc: freebsd-stable@freebsd.org Subject: Re: su password prompt ti stdout instead of /dev/tty Message-ID: <alpine.BSF.2.00.1001242251590.72774@pragry.qngnvk.ybpny> In-Reply-To: <alpine.BSF.2.00.1001242243460.72774@pragry.qngnvk.ybpny> References: <4B5CEC53.3090402@laposte.net> <20100125025744.GA94378@orion.hsd1.pa.comcast.net> <alpine.BSF.2.00.1001242243460.72774@pragry.qngnvk.ybpny>
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On Sun, 24 Jan 2010 22:48, jhell@ wrote: > > On Sun, 24 Jan 2010 21:57, glen.j.barber@ wrote: >> Hi, >> >> Cyrille Lefevre wrote: >>> >>> Hi, >>> >>> su password prompt is displayed to *stdout* instead of */dev/tty*. >>> >>> # su user >>> $ su root -c date > /tmp/date 2>&1 >>> (nothing displayed) >>> $ cat /tmp/date >>> Password:su: Sorry >>> $ uname -a >>> FreeBSD freebsd8.my.domain 8.0-RELEASE FreeBSD 8.0-RELEASE #0: Sat Nov >>> 21 15:48:17 UTC 2009 >>> root@almeida.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC i386 >>> >>> I suppose this is a getpass() problem ? >>> > > This is intended operation as su(1) may not always be affiliated with a TTY. > This leaves it open for a script to chat with much like what samba does with > its passwd chat mechanism. > If you mean for the program to appropriately append or overwrite to a file you should ( su user -c 'date >output 2>&1' ) instead >> >> I cannot reproduce this. In fact, >> >> su root -c date > /tmp/date >> >> hangs waiting for input. >> >> orion % su root -c date > /tmp/date >> ^C >> su: Sorry >> orion % less /tmp/date >> Password: >> orion % >> > > This is essentially what the OP stated was happening except you forgot the > 2>&1. > >> Also, you appear to be running an unpatched version of FreeBSD 8.0, >> subject to the rtld exploit (among a few others). I'd suggest upgrading. >> >> For what it's worth: >> orion % uname -a >> FreeBSD orion 8.0-STABLE FreeBSD 8.0-STABLE #20 r202187: Wed Jan 13 >> 11:51:15 EST 2010 root@orion:/usr/obj/usr/src/sys/ORION amd64 >> >> Regards, >> >> > > > > > -- jhell
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