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Date:	Fri, 6 Nov 2009 13:53:54 +0100
Message-ID:	<1ef5a52f0911060453t726dfc5bwd7793b0346f9eb13@mail.gmail.com>
Subject:	Pseudo-terminal will not be allocated because stdin is not a terminal.
From:	Csaba Raduly <rcsaba AT gmail DOT com>
To:	cygwin AT cygwin DOT com
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Hi all,
I'm about to pack my bags and move from 1.5 to 1.7 (CYGWIN_NT-6.0
EV0017A4D11749 1.7.0(0.217/5/3) 2009-11-03 15:06 i686 Cygwin) on Vista
SP1, but one thing got me stumped.

I log in to different machines (e.g. lab1) via SSH. For this purpose I
created a number of desktop shortcuts, like this:
Target: C:\cygwin\bin\run.exe rxvt --geometry 170x60+0+0 -e ssh -Y lab1
Start in: C:\cygwin\bin

These work fine.

So I created a copy of this shortcut and edited it to
Target: C:\cygwin17\bin\run.exe rxvt --geometry 170x60+0+0 -e ssh -Y lab1
Start in: C:\cygwin17\bin

When I double-click the shortcut to 1.7, the rxvt window comes up but
the above error message (Pseudo-terminal will not be allocated because
stdin is not a terminal.) is displayed at the top and
* the prompt does not appear although I can type commands
* DISPLAY is not set correctly
* joe does not run (Couldn't load termcap/terminfo entry), necause
TERM is not set
* vim displays a warning:
Vim: Warning: Output is not to a terminal
Vim: Warning: Input is not from a terminal

and so on and so forth.

Here's a diff between the environment in lab1 after login via 1.5 and 1.7:

--- envronment.1.5      2009-11-05 16:10:46.000000000 +0100
+++ envronment.1.7      2009-11-05 16:10:27.000000000 +0100
@@ -7,23 +7,21 @@
 XKEYSYMDB=3D/usr/share/X11/XKeysymDB
 HOST=3Dlab1
-TERM=3Dxterm
 SHELL=3D/bin/bash
 PROFILEREAD=3Dtrue
 HISTSIZE=3D1000
 CVSROOT=3D......
 MORE=3D-sl
 QTDIR=3D/usr/lib/qt3
-SSH_TTY=3D/dev/pts/41
 GROFF_NO_SGR=3Dyes
-LS_COLORS=3Dno=3D00:fi=3D00:di=3D01;34:ln=3D00;36:pi=3D40;33:so=3D01;35:do=
=3D01;35:bd=3D40;33;01:cd=3D40;33;01:or=3D41;33;01:ex=3D00;32:*.cmd=3D00;32=
:*.exe=3D01;32:*.com=3D01;32:*.bat=3D01;32:*.btm=3D01;32:*.dll=3D01;32:*.ta=
r=3D00;31:*.tbz=3D00;31:*.tgz=3D00;31:*.rpm=3D00;31:*.deb=3D00;31:*.arj=3D0=
0;31:*.taz=3D00;31:*.lzh=3D00;31:*.zip=3D00;31:*.zoo=3D00;31:*.z=3D00;31:*.=
Z=3D00;31:*.gz=3D00;31:*.bz2=3D00;31:*.tb2=3D00;31:*.tz2=3D00;31:*.tbz2=3D0=
0;31:*.avi=3D01;35:*.bmp=3D01;35:*.fli=3D01;35:*.gif=3D01;35:*.jpg=3D01;35:=
*.jpeg=3D01;35:*.mng=3D01;35:*.mov=3D01;35:*.mpg=3D01;35:*.pcx=3D01;35:*.pb=
m=3D01;35:*.pgm=3D01;35:*.png=3D01;35:*.ppm=3D01;35:*.tga=3D01;35:*.tif=3D0=
1;35:*.xbm=3D01;35:*.xpm=3D01;35:*.dl=3D01;35:*.gl=3D01;35:*.wmv=3D01;35:*.=
aiff=3D00;32:*.au=3D00;32:*.mid=3D00;32:*.mp3=3D00;32:*.ogg=3D00;32:*.voc=
=3D00;32:*.wav=3D00;32:
+LS_COLORS=3D
 XNLSPATH=3D/usr/share/X11/nls
 ENV=3D/etc/bash.bashrc
 HOSTTYPE=3Dx86_64
@@ -74,13 +72,12 @@
 CVS_RSH=3Dssh
 XDG_DATA_DIRS=3D/usr/local/share/:/usr/share/:/etc/opt/kde3/share/:/opt/kd=
e3/share/:/opt/gnome/share/
 ACLOCAL_FLAGS=3D-I /opt/gnome/share/aclocal
 PKG_CONFIG_PATH=3D/usr/local/lib/pkgconfig:/usr/local/share/pkgconfig:/usr=
/lib64/pkgconfig:/usr/share/pkgconfig:/opt/kde3/lib64/pkgconfig:/opt/gnome/=
lib64/pkgconfig:/opt/gnome/lib64/pkgconfig:/opt/gnome/share/pkgconfig
 LESSOPEN=3Dlessopen.sh %s
 CVSEDITOR=3D/usr/bin/joe -nobackups
 INFOPATH=3D/usr/local/info:/usr/share/info:/usr/info:/opt/gnome/share/info
-DISPLAY=3Dlocalhost:16.0
-XAUTHLOCALHOSTNAME=3Dlab1
+DISPLAY=3D:0.0
 LESSCLOSE=3Dlessclose.sh %s %s
 G_BROKEN_FILENAMES=3D1

I thought maybe it's some environment difference problem, but changing
the shortcut like this didn't help:
Target: C:\cygwin\bin\run.exe rxvt --geometry 170x60+0+0 -e bash
--login -c 'ssh -Y lab1'


If I start the local 1.7 Cygwin prompt from another shortcut:
Target: C:\cygwin17\bin\run.exe rxvt.exe --geometry 170x60+0+0 -e
/bin/bash --login
Start in: C:\cygwin17\bin

and then type "ssh -Y lab1", then it works (TERM and DISPLAY are set,
prompt appears, etc)

Any ideas ? (I used up mine).

The fork behavior of 1.5 and 1.7 appears to be different:
In 1.5, rxvt spawns another rxvt, which spawns ssh; then the second rxvt ex=
its:

Name                             Pid Pri Thd  Hnd      VM      WS    Priv
rxvt                            6116   8   4  110  443164    5472    3712
ssh                             5448   8   5  147  449716    6320    3704

In 1.7, the second rxvt sticks around:
rxvt                            5932   8   4  127  444184    6288    4736
  rxvt                          3124   8   2   87  431304    3944    3632
    ssh                         5748   8   5  169  449540    6200    3700

Csaba
--=20
Life is complex, with real and imaginary parts

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