Hi,
I am trying to update our Cygwin libraries at work, which we use on many
servers to provide OpenSSH services.
I have been making update packages for many years from a Cygwin install on a
development server, and went to update our systems to the latest OpenSSH 8.3p1
build.
However after making the update package, I found that the Windows Event Log (or
if Syslogd is setup – which we do have in our general Cygwin deployment
/var/log/messages) gets two errors when using any version of the Cygwin
Libraries after the 3.1.4 build.
Sep 14 12:06:48 hostname sshd: PID 2093: error: Failed to disconnect from
controlling tty.
Sep 14 12:06:48 hostname sshd: PID 2093: error: ioctl(TIOCSCTTY): Operation not
permitted
I first tried rolling back to older OpenSSH packages (tried 8.2, 8.1 and what
we had been using 7.8), but found that all versions still had the same error in
the ssh connections. I then tried older builds of the core Cygwin updates and
found that version 3.1.4 and earlier don’t display this error when the SSH
connection occurs, but 3.1.5 and later (tested up to 3.1.7) do show this error.
It doesn’t actually seem to affect the SSH connections, they work fine, but it
logs two errors every time.
I found the lines that produce these errors in the sshpty.c file
(https://github.com/openssh/openssh-portable/blob/master/sshpty.c), lines 120
and 127 in the source code write these errors out, but I can’t see specifically
what I would need to change to fix this, and I checked that the source code for
older versions of OpenSSH haven’t changed for many versions (checked the master
branch, and versions back to the 7.8 build we were on before in the sshpty.c
source code).
Anyway, I think its a bug that has been introduced in 3.1.5 version or later,
or possibly it has always been happening but just not reported before?
I’ve attached a cygcheck.exe -s output (I removed a few bits that for internal
security I wouldn’t want to post), but in my test Cygwin x64 build I can see
this problem is resolved by rolling back to the 3.1.4 cygwin core libraries.
Any help in resolving this issue would be great.
Peter
Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10
Cygwin Configuration Diagnostics
Current System Time: Mon Sep 14 18:02:40 2020
Windows 2012 R2 Server Datacenter Ver 6.3 Build 9600
Running in Terminal Service session
Path: C:\Program Files\avs\bin
C:\Program Files\avs\bin32
C:\Windows\system32
C:\Windows
C:\Windows\System32\Wbem
C:\Windows\System32\WindowsPowerShell\v1.0\
C:\Program Files\Microsoft SQL Server\Client SDK\ODBC\110\Tools\Binn\
C:\Program Files (x86)\Microsoft SQL Server\120\Tools\Binn\
C:\Program Files\Microsoft SQL Server\120\Tools\Binn\
C:\Program Files\Microsoft SQL Server\120\DTS\Binn\
C:\Program Files (x86)\Microsoft SQL
Server\120\Tools\Binn\ManagementStudio
C:\Program Files (x86)\Microsoft SQL Server\120\DTS\Binn
c:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn
c:\Program Files\Microsoft SQL Server\100\Tools\Binn
c:\Program Files\Microsoft SQL Server\100\DTS\Binn
C:\Program Files\Microsoft DNX\Dnvm
C:\Program Files (x86)\Microsoft SMS Installer\Installer Step-up
Utility\Apps
C:\Program Files (x86)\Microsoft SMS Installer\Installer Step-up
Utility\Apps\Extensions
C:\Program Files (x86)\ExchangeMapi
C:\Program Files\Microsoft\Web Platform Installer
C:\Program Files (x86)\Microsoft SQL
Server\120\Tools\Binn\ManagementStudio\
C:\Program Files (x86)\Microsoft SQL Server\120\DTS\Binn\
.
Output from F:\cygwin64\bin\id.exe
UID: 1051173(xxxxxx admin)
GID: 1049089(Domain Users)
1049089(Domain Users)
197612(HOSTNAME+HelpLibraryUpdaters)
197617(HOSTNAME+WSS_ADMIN_WPG)
559(Performance Log Users)
545(Users)
544(Administrators)
14(REMOTE INTERACTIVE LOGON)
4(INTERACTIVE)
11(Authenticated Users)
15(This Organization)
4095(CurrentSession)
66048(LOCAL)
1049088(Domain Admins)
405504(High Mandatory Level)
SysDir: C:\Windows\system32
WinDir: C:\Windows
Path = 'C:\Program Files\avs\bin;C:\Program
Files\avs\bin32;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\CITEC\PROGRAMS\I386\TOOLS;C:\CITEC\SPLUNK;C:\Program
Files (x86)\OpenSSH\Bin;C:\Program Files\Microsoft SQL Server\Client
SDK\ODBC\110\Tools\Binn\;C:\Program Files (x86)\Microsoft SQL
Server\120\Tools\Binn\;C:\Program Files\Microsoft SQL
Server\120\Tools\Binn\;C:\Program Files\Microsoft SQL
Server\120\DTS\Binn\;C:\Program Files (x86)\Microsoft SQL
Server\120\Tools\Binn\ManagementStudio;C:\Program Files (x86)\Microsoft SQL
Server\120\DTS\Binn;c:\Program Files (x86)\Microsoft SQL
Server\100\Tools\Binn;c:\Program Files\Microsoft SQL
Server\100\Tools\Binn;c:\Program Files\Microsoft SQL
Server\100\DTS\Binn;C:\Users\boardp_admin.QGI\.dnx\bin;C:\Program
Files\Microsoft DNX\Dnvm;C:\Program Files (x86)\Microsoft SMS
Installer\Installer Step-up Utility\Apps;C:\Program Files (x86)\Microsoft SMS
Installer\Installer Step-up Utility\Apps\Extensions;C:\Program Files
(x86)\ExchangeMapi;E:\oracle\instantclient_12_1;C:\Program Files\Microsoft\Web
Platform Installer;C:\Program Files (x86)\Microsoft SQL
Server\120\Tools\Binn\ManagementStudio\;C:\Program Files (x86)\Microsoft SQL
Server\120\DTS\Binn\;'
Use '-r' to scan registry
obcaseinsensitive set to 1
Cygwin installations found in the registry:
System: Key: 26046373354fe4fc Path: F:\cygwin64
User: Key: b99ad95be22e68fe Path: F:\cygwin
c: hd NTFS 143006Mb 84% CP CS UN PA FC QU
d: hd NTFS 35708Mb 14% CP CS UN PA FC QU SQLDATA
e: hd NTFS 40829Mb 60% CP CS UN PA FC QU SQL Backup and Email
f: hd NTFS 10205Mb 19% CP CS UN PA FC QU Cygwin
g: hd NTFS 102269Mb 31% CP CS UN PA FC QU DISTRIBS
z: cd N/A N/A
F:\cygwin64 / system binary,auto
F:\cygwin64\bin /usr/bin system binary,auto
F:\cygwin64\lib /usr/lib system binary,auto
cygdrive prefix /cygdrive user binary,posix=0,auto
39k 2016/09/19 .\cygargp-0.dll
19k 2018/12/20 .\cygattr-1.dll
254k 2020/03/31 .\cygblkid-1.dll
66k 2019/07/21 .\cygbz2-1.dll
42k 2020/02/17 .\cygcbor-0.dll
13k 2019/01/02 .\cygcom_err-2.dll
39k 2017/09/03 .\cygcrypt-0.dll
194k 2019/04/03 .\cygcrypt-2.dll
2273k 2018/04/03 .\cygcrypto-1.0.0.dll
2451k 2020/04/08 .\cygcrypto-1.1.dll
154k 2013/10/20 .\cygedit-0.dll
353k 2020/03/31 .\cygfdisk-1.dll
27k 2015/11/17 .\cygffi-6.dll
118k 2020/02/19 .\cygfido2-1.dll
56k 2019/07/28 .\cygformw-10.dll
73k 2020/04/16 .\cyggcc_s-seh-1.dll
46k 2019/07/10 .\cyggdbm-4.dll
582k 2020/03/01 .\cyggmp-10.dll
938k 2017/05/02 .\cyggnutls-28.dll
1472k 2019/07/29 .\cyggnutls-30.dll
24k 2017/05/02 .\cyggnutls-openssl-27.dll
274k 2018/03/16 .\cyggssapi_krb5-2.dll
33k 2017/02/13 .\cyghistory7.dll
167k 2016/03/13 .\cyghogweed-2.dll
168k 2019/02/19 .\cyghogweed-4.dll
1007k 2020/07/13 .\cygiconv-2.dll
196k 2014/12/06 .\cygidn-11.dll
114k 2019/07/29 .\cygidn2-0.dll
42k 2016/10/23 .\cygintl-8.dll
192k 2018/03/16 .\cygk5crypto-3.dll
754k 2018/03/16 .\cygkrb5-3.dll
37k 2018/03/16 .\cygkrb5support-0.dll
144k 2019/07/21 .\cyglzma-5.dll
125k 2018/03/18 .\cygmagic-1.dll
168k 2018/01/23 .\cygman-2-7-6-1.dll
22k 2018/01/23 .\cygmandb-2-7-6-1.dll
28k 2019/07/28 .\cygmenuw-10.dll
346k 2017/08/01 .\cygmpfr-4.dll
2664k 2020/07/11 .\cygmpfr-6.dll
301k 2019/07/28 .\cygncursesw-10.dll
180k 2016/03/13 .\cygnettle-4.dll
205k 2019/02/19 .\cygnettle-6.dll
1020k 2020/03/27 .\cygp11-kit-0.dll
14k 2019/07/28 .\cygpanelw-10.dll
474k 2020/03/29 .\cygpcre-1.dll
41k 2019/09/12 .\cygpipeline-1.dll
41k 2016/07/13 .\cygpopt-0.dll
54k 2016/09/20 .\cygprocps-5.dll
65k 2019/07/21 .\cygpsl-5.dll
219k 2017/02/13 .\cygreadline7.dll
11k 2015/07/17 .\cygsigsegv-2.dll
14k 2020/02/19 .\cygsk-libfido2.dll
156k 2020/03/31 .\cygsmartcols-1.dll
403k 2018/04/03 .\cygssl-1.0.0.dll
506k 2020/04/08 .\cygssl-1.1.dll
12k 2017/09/09 .\cygssp-0.dll
1681k 2020/04/16 .\cygstdc++-6.dll
68k 2019/07/29 .\cygtasn1-6.dll
57k 2019/07/28 .\cygticw-10.dll
1612k 2018/08/16 .\cygunistring-2.dll
27k 2020/03/31 .\cyguuid-1.dll
30k 2013/11/15 .\cygwrap-0.dll
83k 2017/03/03 .\cygz.dll
3473k 2020/08/22 .\cygwin1.dll
Cygwin DLL version info:
DLL version: 3.1.7
DLL epoch: 19
DLL old termios: 5
DLL malloc env: 28
Cygwin conv: 181
API major: 0
API minor: 340
Shared data: 5
DLL identifier: cygwin1
Mount registry: 3
Cygwin registry name: Cygwin
Installations name: Installations
Cygdrive default prefix:
Build date:
Shared id: cygwin1S5
39k 2016/09/19 F:\cygwin64\bin\cygargp-0.dll
19k 2018/12/20 F:\cygwin64\bin\cygattr-1.dll
254k 2020/03/31 F:\cygwin64\bin\cygblkid-1.dll
66k 2019/07/21 F:\cygwin64\bin\cygbz2-1.dll
42k 2020/02/17 F:\cygwin64\bin\cygcbor-0.dll
13k 2019/01/02 F:\cygwin64\bin\cygcom_err-2.dll
39k 2017/09/03 F:\cygwin64\bin\cygcrypt-0.dll
194k 2019/04/03 F:\cygwin64\bin\cygcrypt-2.dll
2273k 2018/04/03 F:\cygwin64\bin\cygcrypto-1.0.0.dll
2451k 2020/04/08 F:\cygwin64\bin\cygcrypto-1.1.dll
154k 2013/10/20 F:\cygwin64\bin\cygedit-0.dll
353k 2020/03/31 F:\cygwin64\bin\cygfdisk-1.dll
27k 2015/11/17 F:\cygwin64\bin\cygffi-6.dll
118k 2020/02/19 F:\cygwin64\bin\cygfido2-1.dll
56k 2019/07/28 F:\cygwin64\bin\cygformw-10.dll
73k 2020/04/16 F:\cygwin64\bin\cyggcc_s-seh-1.dll
46k 2019/07/10 F:\cygwin64\bin\cyggdbm-4.dll
582k 2020/03/01 F:\cygwin64\bin\cyggmp-10.dll
938k 2017/05/02 F:\cygwin64\bin\cyggnutls-28.dll
1472k 2019/07/29 F:\cygwin64\bin\cyggnutls-30.dll
24k 2017/05/02 F:\cygwin64\bin\cyggnutls-openssl-27.dll
274k 2018/03/16 F:\cygwin64\bin\cyggssapi_krb5-2.dll
33k 2017/02/13 F:\cygwin64\bin\cyghistory7.dll
167k 2016/03/13 F:\cygwin64\bin\cyghogweed-2.dll
168k 2019/02/19 F:\cygwin64\bin\cyghogweed-4.dll
1007k 2020/07/13 F:\cygwin64\bin\cygiconv-2.dll
196k 2014/12/06 F:\cygwin64\bin\cygidn-11.dll
114k 2019/07/29 F:\cygwin64\bin\cygidn2-0.dll
42k 2016/10/23 F:\cygwin64\bin\cygintl-8.dll
192k 2018/03/16 F:\cygwin64\bin\cygk5crypto-3.dll
754k 2018/03/16 F:\cygwin64\bin\cygkrb5-3.dll
37k 2018/03/16 F:\cygwin64\bin\cygkrb5support-0.dll
144k 2019/07/21 F:\cygwin64\bin\cyglzma-5.dll
125k 2018/03/18 F:\cygwin64\bin\cygmagic-1.dll
168k 2018/01/23 F:\cygwin64\bin\cygman-2-7-6-1.dll
22k 2018/01/23 F:\cygwin64\bin\cygmandb-2-7-6-1.dll
28k 2019/07/28 F:\cygwin64\bin\cygmenuw-10.dll
346k 2017/08/01 F:\cygwin64\bin\cygmpfr-4.dll
2664k 2020/07/11 F:\cygwin64\bin\cygmpfr-6.dll
301k 2019/07/28 F:\cygwin64\bin\cygncursesw-10.dll
180k 2016/03/13 F:\cygwin64\bin\cygnettle-4.dll
205k 2019/02/19 F:\cygwin64\bin\cygnettle-6.dll
1020k 2020/03/27 F:\cygwin64\bin\cygp11-kit-0.dll
14k 2019/07/28 F:\cygwin64\bin\cygpanelw-10.dll
474k 2020/03/29 F:\cygwin64\bin\cygpcre-1.dll
41k 2019/09/12 F:\cygwin64\bin\cygpipeline-1.dll
41k 2016/07/13 F:\cygwin64\bin\cygpopt-0.dll
54k 2016/09/20 F:\cygwin64\bin\cygprocps-5.dll
65k 2019/07/21 F:\cygwin64\bin\cygpsl-5.dll
219k 2017/02/13 F:\cygwin64\bin\cygreadline7.dll
11k 2015/07/17 F:\cygwin64\bin\cygsigsegv-2.dll
14k 2020/02/19 F:\cygwin64\bin\cygsk-libfido2.dll
156k 2020/03/31 F:\cygwin64\bin\cygsmartcols-1.dll
403k 2018/04/03 F:\cygwin64\bin\cygssl-1.0.0.dll
506k 2020/04/08 F:\cygwin64\bin\cygssl-1.1.dll
12k 2017/09/09 F:\cygwin64\bin\cygssp-0.dll
1681k 2020/04/16 F:\cygwin64\bin\cygstdc++-6.dll
68k 2019/07/29 F:\cygwin64\bin\cygtasn1-6.dll
57k 2019/07/28 F:\cygwin64\bin\cygticw-10.dll
1612k 2018/08/16 F:\cygwin64\bin\cygunistring-2.dll
27k 2020/03/31 F:\cygwin64\bin\cyguuid-1.dll
30k 2013/11/15 F:\cygwin64\bin\cygwrap-0.dll
83k 2017/03/03 F:\cygwin64\bin\cygz.dll
3473k 2020/08/22 F:\cygwin64\bin\cygwin1.dll
Cygwin DLL version info:
DLL version: 3.1.7
DLL epoch: 19
DLL old termios: 5
DLL malloc env: 28
Cygwin conv: 181
API major: 0
API minor: 340
Shared data: 5
DLL identifier: cygwin1
Mount registry: 3
Cygwin registry name: Cygwin
Installations name: Installations
Cygdrive default prefix:
Build date:
Shared id: cygwin1S5
Service : cygsshd
Display name : CYGWIN cygsshd
Current State : Stopped
Command : /usr/sbin/sshd -D
Cygwin Package Information
Package Version Status
_autorebase 001007-1 OK
alternatives 1.3.30c-10 OK
base-cygwin 3.8-1 OK
base-files 4.3-2 OK
bash 4.4.12-3 OK
bzip2 1.0.8-1 OK
ca-certificates 2.40-1 OK
coreutils 8.26-2 OK
crypto-policies 20190218-1 OK
csih 0.9.11-1 OK
cygrunsrv 1.62-1 OK
cygutils 1.4.16-2 OK
cygwin 3.1.7-1 OK
dash 0.5.9.1-1 OK
diffutils 3.5-2 OK
dos2unix 7.3.4-1 OK
editrights 1.03-1 OK
file 5.32-1 OK
findutils 4.6.0-1 OK
gawk 5.1.0-1 OK
getent 2.18.90-4 OK
grep 3.0-2 OK
groff 1.22.4-1 OK
gzip 1.8-1 OK
hostname 3.13-1 OK
inetutils 1.9.4-1 OK
inetutils-server 1.9.4-1 OK
info 6.7-1 OK
ipc-utils 1.0-2 OK
less 551-1 OK
libargp 20110921-3 OK
libattr1 2.4.48-2 OK
libblkid1 2.33.1-2 OK
libbz2_1 1.0.8-1 OK
libcbor 0.5.0-1 OK
libcom_err2 1.44.5-1 OK
libcrypt0 2.1-1 OK
libcrypt2 4.4.4-1 OK
libedit0 20130712-1 OK
libfdisk1 2.33.1-2 OK
libffi6 3.2.1-2 OK
libfido2 1.3.0-2 OK
libgcc1 9.3.0-2 OK
libgdbm4 1.13-1 OK
libgmp10 6.2.0-2 OK
libgnutls28 3.3.27-1 OK
libgnutls30 3.6.9-1 OK
libgssapi_krb5_2 1.15.2-2 OK
libhogweed2 2.7.1-1 OK
libhogweed4 3.4.1-1 OK
libiconv 1.16-2 OK
libiconv2 1.16-2 OK
libidn11 1.29-1 OK
libidn2_0 2.2.0-1 OK
libintl8 0.19.8.1-2 OK
libk5crypto3 1.15.2-2 OK
libkrb5_3 1.15.2-2 OK
libkrb5support0 1.15.2-2 OK
liblzma5 5.2.4-1 OK
libmpfr4 3.1.5-1p10 OK
libmpfr6 4.1.0-1 OK
libncursesw10 6.1-1.20190727 OK
libnettle4 2.7.1-1 OK
libnettle6 3.4.1-1 OK
libopenssl100 1.0.2o-1 OK
libp11-kit0 0.23.20-1 OK
libpcre1 8.44-1 OK
libpipeline1 1.5.1-1 OK
libpopt-common 1.16-2 OK
libpopt0 1.16-2 OK
libprocps-ng5 3.3.11-1 OK
libpsl5 0.21.0-1 OK
libreadline7 7.0.3-3 OK
libsigsegv2 2.10-2 OK
libsmartcols1 2.33.1-2 OK
libssl1.1 1.1.1f-1 OK
libssp0 6.4.0-1 OK
libstdc++6 9.3.0-2 OK
libtasn1_6 4.14-1 OK
libunistring2 0.9.10-1 OK
libuuid1 2.33.1-2 OK
libwrap0 7.6-22 OK
login 1.13-1 OK
man-db 2.7.6.1-1 OK
mintty 3.3.0-1 OK
nano 2.9.7-1 OK
ncurses 6.1-1.20190727 OK
openssh 8.3p1-1 OK
openssl 1.1.1f-1 OK
p11-kit 0.23.20-1 OK
p11-kit-trust 0.23.20-1 OK
procps-ng 3.3.11-1 OK
publicsuffix-list-dafsa 20200326-1 OK
rebase 4.4.4-1 OK
run 1.3.4-2 OK
sed 4.4-1 OK
tar 1.29-1 OK
terminfo 6.1-1.20190727 OK
terminfo-extra 6.1-1.20190727 OK
tzcode 2020a-1 OK
tzdata 2020a-1 OK
util-linux 2.33.1-2 OK
vim 7.4.2367-1 OK
vim-common 7.4.2367-1 OK
vim-minimal 8.2.0486-1 OK
wget 1.19.1-2 OK
which 2.20-2 OK
xxd 7.4.2367-1 OK
xz 5.2.4-1 OK
zlib0 1.2.11-1 OK
Use -h to see help about each section
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