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* scp and ssh 'cat' stalls at 64k bytes
@ 2023-06-23  6:26 Chris Roehrig
  2023-06-23 15:28 ` Brian Inglis
  0 siblings, 1 reply; 14+ messages in thread
From: Chris Roehrig @ 2023-06-23  6:26 UTC (permalink / raw)
  To: cygwin

I've upgraded cygwin recently (from a much older version) and am 
encountering a new problem on all my Win10/WIn11 machines.

With openssh and pv installed on cygwin (3.4.7-1):

dd if=/dev/zero bs=1 count=65536 | ssh localhost 'cat > /dev/null'    # 
works
dd if=/dev/zero bs=1 count=65537 | ssh localhost 'cat > /dev/null'    # 
stalls (and anything larger)
dd if=/dev/zero bs=1 count=65537 | ssh localhost 'pv > /dev/null'    # 
replace 'cat' with 'pv' and it works

This happens with or without Windows Firewall enabled, with any input > 
64k, and also remotely from Linux.
It also seems to affect scp to cygwin which stalls if the file is >= 64k



^ permalink raw reply	[flat|nested] 14+ messages in thread

* Re: scp and ssh 'cat' stalls at 64k bytes
  2023-06-23  6:26 scp and ssh 'cat' stalls at 64k bytes Chris Roehrig
@ 2023-06-23 15:28 ` Brian Inglis
  2023-06-23 19:41   ` Chris Roehrig
  0 siblings, 1 reply; 14+ messages in thread
From: Brian Inglis @ 2023-06-23 15:28 UTC (permalink / raw)
  To: cygwin; +Cc: Chris Roehrig

On 2023-06-23 00:26, Chris Roehrig via Cygwin wrote:
> I've upgraded cygwin recently (from a much older version) and am encountering a 
> new problem on all my Win10/WIn11 machines.
> 
> With openssh and pv installed on cygwin (3.4.7-1):
> 
> dd if=/dev/zero bs=1 count=65536 | ssh localhost 'cat > /dev/null'    # works
> dd if=/dev/zero bs=1 count=65537 | ssh localhost 'cat > /dev/null'    # stalls 
> (and anything larger)
> dd if=/dev/zero bs=1 count=65537 | ssh localhost 'pv > /dev/null'    # replace 
> 'cat' with 'pv' and it works
> 
> This happens with or without Windows Firewall enabled, with any input > 64k, and 
> also remotely from Linux.
> It also seems to affect scp to cygwin which stalls if the file is >= 64k

In case equivalent Windows services are running, I check for, shut down, and 
disable the following Windows services I have seen, or seen warnings about, 
before trying to start Cygwin services:

	ssh ssh-agent sshbroker sshproxy sshd sshdbroker sshdproxy

Do you take similar precautions on the Windows systems with issues?

Please show at least the output of `uname -srvmo`, and if possible provide a 
text attachment of the output log from running `cygcheck -hrsv > cygcheck.out`, 
as suggested under the Problem reports link below.

-- 
Take care. Thanks, Brian Inglis              Calgary, Alberta, Canada

La perfection est atteinte                   Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter  not when there is no more to add
mais lorsqu'il n'y a plus rien à retirer     but when there is no more to cut
                                 -- Antoine de Saint-Exupéry


^ permalink raw reply	[flat|nested] 14+ messages in thread

* Re: scp and ssh 'cat' stalls at 64k bytes
  2023-06-23 15:28 ` Brian Inglis
@ 2023-06-23 19:41   ` Chris Roehrig
  2023-06-23 23:07     ` Voris, Ben
  0 siblings, 1 reply; 14+ messages in thread
From: Chris Roehrig @ 2023-06-23 19:41 UTC (permalink / raw)
  To: cygwin

[-- Attachment #1: Type: text/plain, Size: 2805 bytes --]


On 2023-06-23 08:28, Brian Inglis wrote:
> On 2023-06-23 00:26, Chris Roehrig via Cygwin wrote:
>> I've upgraded cygwin recently (from a much older version) and am 
>> encountering a new problem on all my Win10/WIn11 machines.
>>
>> With openssh and pv installed on cygwin (3.4.7-1):
>>
>> dd if=/dev/zero bs=1 count=65536 | ssh localhost 'cat > /dev/null'    
>> # works
>> dd if=/dev/zero bs=1 count=65537 | ssh localhost 'cat > /dev/null'    
>> # stalls (and anything larger)
>> dd if=/dev/zero bs=1 count=65537 | ssh localhost 'pv > /dev/null'    
>> # replace 'cat' with 'pv' and it works
>>
>> This happens with or without Windows Firewall enabled, with any input 
>> > 64k, and also remotely from Linux.
>> It also seems to affect scp to cygwin which stalls if the file is >= 64k
>
> In case equivalent Windows services are running, I check for, shut 
> down, and disable the following Windows services I have seen, or seen 
> warnings about, before trying to start Cygwin services:
>
>     ssh ssh-agent sshbroker sshproxy sshd sshdbroker sshdproxy
>
> Do you take similar precautions on the Windows systems with issues?

The only service listed is ssh-agent which is disabled and stopped.   
TaskManager did show many zombie/stuck cat.exe  and scp.exe which I 
terminated, but that did not help.   Nor did rebooting.

I use ssh, rsync, slogin frequently on these machines to/from windows 
and linux and rsync (over ssh) gigabytes of stuff daily to/from Linux 
and other windows machines with no issues.   It is only this case of 
reading more than 64K from stdin over ssh (and scp) that is hanging.

> Please show at least the output of `uname -srvmo`, 
CYGWIN_NT-10.0-19045 3.4.7-1.x86_64 2023-06-16 14:04 UTC x86_64 Cygwin

> and if possible provide a text attachment of the output log from 
> running `cygcheck -hrsv > cygcheck.out`, as suggested under the 
> Problem reports link below.
I've attached the file.


I take it then you can't replicate this?    Can you confirm whether this 
command works successfully (i.e. exits without hanging):

dd if=/dev/zero bs=1 count=65537 | ssh localhost 'cat > /dev/null'

Are you able to 'scp' large files to cygwin?


It also hangs if I replace 'cat' with 'sed {}' or 'awk {print}', but not 
with 'pv'.   Those all passthrough stdin>stdout and should behave the 
same as cat.  (pv is basically cat with a progress bar which is omitted 
if there's  no controlling terminal like in this case).


The curious fact that 'pv' works makes me think it is a Cygwin library 
problem and not anything related to firewall/network/Windows.

I've verified that cat, pv, and sshd all have the same ACLs.  e.g.
aquila[77]% icacls pv.exe
pv.exe AQUILA\croehrig:(F)
         BUILTIN\Administrators:(RX)
        Everyone:(RX)

[-- Attachment #2: cygcheck.out --]
[-- Type: text/plain, Size: 80595 bytes --]


Cygwin Configuration Diagnostics
Current System Time: Fri Jun 23 11:12:55 2023

Windows 10 Professional Ver 10.0 Build 19045 

Path:	C:\cygwin\home\croehrig\bin\WIN
	C:\cygwin\home\croehrig\bin
	C:\cygwin\usr\local\bin
	C:\cygwin\bin
	C:\Windows\system32
	C:\Windows

Output from C:\cygwin\bin\id.exe
UID: 601(croehrig)
GID: 601(croehrig)
601(croehrig)
1099(wnone)
114(Local account and member of Administrators group)
80(admin)
1001(chrises)
1002(house)
544(Administrators)
545(Users)
2(NETWORK)
11(Authenticated Users)
15(This Organization)
113(Local account)
4095(CurrentSession)
262154(NTLM Authentication)
405504(High Mandatory Level)

SysDir: C:\Windows\system32
WinDir: C:\Windows

Here's some environment variables that may affect cygwin:
PWD = '/home/croehrig'
HOME = '/home/croehrig'
USER = 'croehrig'

Here's the rest of your environment variables:
ProgramFiles(x86) = 'C:\Program Files (x86)'
CommonProgramFiles(x86) = 'C:\Program Files (x86)\Common Files'
asl.log = 'Destination=file'
SHELL = '/bin/bash'
NUMBER_OF_PROCESSORS = '16'
PROCESSOR_LEVEL = '25'
LESS = '-X -R'
USERDOMAIN_ROAMINGPROFILE = 'AQUILA'
PROGRAMFILES = 'C:\Program Files'
PATHEXT = '.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC;.PY;.PYW'
OS = 'Windows_NT'
HOMEDRIVE = 'C:'
EDITOR = 'vim'
USERDOMAIN = 'AQUILA'
USERPROFILE = 'C:\Users\croehrig'
LOGNAME = 'croehrig'
VS140COMNTOOLS = 'C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\Tools\'
CommonProgramFiles = 'C:\Program Files\Common Files'
ALLUSERSPROFILE = 'C:\ProgramData'
CommonProgramW6432 = 'C:\Program Files\Common Files'
USERNAME = 'croehrig'
OneDrive = 'C:\Users\croehrig\OneDrive'
COMSPEC = 'C:\Windows\system32\cmd.exe'
APPDATA = 'C:\Users\croehrig\AppData\Roaming'
SYSTEMROOT = 'C:\Windows'
LOCALAPPDATA = 'C:\Users\croehrig\AppData\Local'
SSH_CONNECTION = '192.168.32.4 34164 192.168.32.26 22'
COMPUTERNAME = 'AQUILA'
LOGONSERVER = '\\AQUILA'
ISROOT = 'yes'
PSModulePath = '%ProgramFiles%\WindowsPowerShell\Modules;C:\Windows\system32\WindowsPowerShell\v1.0\Modules'
DISPLAY = ':0.0'
SHLVL = '0'
PROCESSOR_REVISION = '2102'
DriverData = 'C:\Windows\System32\Drivers\DriverData'
PROCESSOR_IDENTIFIER = 'AMD64 Family 25 Model 33 Stepping 2, AuthenticAMD'
SSH_CLIENT = '192.168.32.4 34164 22'
LC_ALL = 'POSIX'
HOMEPATH = '\cygwin\home\croehrig'
ProgramW6432 = 'C:\Program Files'
MAIL = '/var/spool/mail//croehrig'
WINDIR = 'C:\Windows'
PROCESSOR_ARCHITECTURE = 'AMD64'
PUBLIC = 'C:\Users\Public'
SYSTEMDRIVE = 'C:'
ProgramData = 'C:\ProgramData'
_ = '/usr/bin/cygcheck'

Scanning registry for keys with 'Cygwin' in them...
HKEY_CURRENT_USER\SOFTWARE\Cygwin
HKEY_CURRENT_USER\SOFTWARE\Cygwin\Installations
  (default) = '\??\C:\cygwin'
HKEY_LOCAL_MACHINE\SOFTWARE\Cygwin
HKEY_LOCAL_MACHINE\SOFTWARE\Cygwin\Installations
  (default) = '\??\C:\cygwin'
HKEY_LOCAL_MACHINE\SOFTWARE\Cygwin\setup
  (default) = 'C:\cygwin'

obcaseinsensitive set to 1

Cygwin installations found in the registry:
  System: Key: c5e39b7a9d22bafb Path: C:\cygwin
  User:   Key: c5e39b7a9d22bafb Path: C:\cygwin

Listing available drives...
Drv Type          Size   Used Flags              Name
c:  hd  NTFS   1841565Mb  64% CP CS UN PA FC    QU  WIN10
d:  hd  NTFS   1907711Mb  59% CP CS UN PA FC    QU  GAMES

fd = floppy,          hd = hard drive,       cd = CD-ROM
net= Network Share,   ram= RAM drive,        unk= Unknown
CP = Case Preserving, CS = Case Sensitive,   UN = Unicode
PA = Persistent ACLS, FC = File Compression, VC = Volume Compression

Mount entries: these map POSIX directories to your NT drives.
-NT-             -POSIX-    -Type-  -Flags-
C:\cygwin        /          system  binary,auto
C:\cygwin\bin    /usr/bin   system  binary,auto
C:\cygwin\lib    /usr/lib   system  binary,auto
cygdrive prefix  /cygdrive  user    binary,posix=0,auto

Looking to see where common programs can be found, if at all...
Found: C:\cygwin\bin\awk
 -> C:\cygwin\bin\gawk.exe
Found: C:\cygwin\bin\bash.exe
Found: C:\cygwin\bin\cat.exe
Found: C:\Windows\system32\certutil.exe
Not Found: clinfo
Found: C:\Windows\system32\comp.exe
Found: C:\Windows\system32\convert.exe
Found: C:\cygwin\bin\cp.exe
Found: C:\cygwin\bin\cpp.exe
Not Found: crontab
Found: C:\Windows\system32\curl.exe
Found: C:\cygwin\bin\expand.exe
Found: C:\Windows\system32\expand.exe
Warning: C:\cygwin\bin\expand.exe hides C:\Windows\system32\expand.exe
Found: C:\cygwin\bin\find.exe
Found: C:\Windows\system32\find.exe
Warning: C:\cygwin\bin\find.exe hides C:\Windows\system32\find.exe
Found: C:\cygwin\bin\ftp.exe
Found: C:\Windows\system32\ftp.exe
Warning: C:\cygwin\bin\ftp.exe hides C:\Windows\system32\ftp.exe
Found: C:\cygwin\bin\gcc.exe
Not Found: gdb
Found: C:\cygwin\bin\grep.exe
Found: C:\cygwin\usr\local\bin\hostname
Found: C:\cygwin\bin\hostname.exe
Warning: C:\cygwin\usr\local\bin\hostname hides C:\cygwin\bin\hostname.exe
Found: C:\Windows\system32\hostname.exe
Warning: C:\cygwin\usr\local\bin\hostname hides C:\Windows\system32\hostname.exe
Found: C:\cygwin\bin\kill.exe
Found: C:\Windows\system32\klist.exe
Found: C:\cygwin\bin\ld.exe
Found: C:\cygwin\bin\ls.exe
Found: C:\cygwin\bin\make.exe
Found: C:\cygwin\bin\mv.exe
Found: C:\cygwin\bin\nslookup.exe
Found: C:\Windows\system32\nslookup.exe
Warning: C:\cygwin\bin\nslookup.exe hides C:\Windows\system32\nslookup.exe
Found: C:\cygwin\bin\patch.exe
Found: C:\cygwin\bin\perl.exe
Found: C:\Windows\system32\replace.exe
Found: C:\cygwin\bin\rm.exe
Found: C:\cygwin\bin\sed.exe
Found: C:\cygwin\bin\sh.exe
Found: C:\Windows\system32\shutdown.exe
Found: C:\cygwin\bin\sort.exe
Found: C:\Windows\system32\sort.exe
Warning: C:\cygwin\bin\sort.exe hides C:\Windows\system32\sort.exe
Found: C:\cygwin\bin\ssh.exe
Found: C:\cygwin\bin\tar.exe
Found: C:\Windows\system32\tar.exe
Warning: C:\cygwin\bin\tar.exe hides C:\Windows\system32\tar.exe
Found: C:\cygwin\bin\test.exe
Found: C:\cygwin\bin\timeout.exe
Found: C:\Windows\system32\timeout.exe
Warning: C:\cygwin\bin\timeout.exe hides C:\Windows\system32\timeout.exe
Found: C:\cygwin\bin\vi.exe
Found: C:\cygwin\bin\vim.exe
Found: C:\cygwin\bin\whoami.exe
Found: C:\Windows\system32\whoami.exe
Warning: C:\cygwin\bin\whoami.exe hides C:\Windows\system32\whoami.exe

Looking for various Cygwin DLLs...  (-v gives version info)
   39k 2016/09/19 C:\cygwin\bin\cygargp-0.dll - os=4.0 img=0.0 sys=5.2
                  "cygargp-0.dll" v0.0 ts=2016-09-18 18:13
  616k 2019/12/26 C:\cygwin\bin\cygaspell-15.dll - os=4.0 img=0.0 sys=5.2
                  "cygaspell-15.dll" v0.0 ts=2019-12-26 02:12
   66k 2022/08/12 C:\cygwin\bin\cygassuan-0.dll - os=4.0 img=0.0 sys=5.2
                  "cygassuan-0.dll" v0.0 ts=2022-08-12 01:33
  118k 2018/02/11 C:\cygwin\bin\cygatk-1.0-0.dll - os=4.0 img=0.0 sys=5.2
                  "cygatk-1.0-0.dll" v0.0 ts=2018-02-11 15:28
   29k 2023/06/05 C:\cygwin\bin\cygatomic-1.dll - os=4.0 img=0.0 sys=5.2
                  "cygatomic-1.dll" v0.0 ts=2023-06-05 08:14
   17k 2023/01/15 C:\cygwin\bin\cygattr-1.dll - os=4.0 img=0.0 sys=5.2
                  "cygattr-1.dll" v0.0 ts=2023-01-15 07:39
   63k 2019/08/27 C:\cygwin\bin\cygbind9-161.dll - os=4.0 img=0.0 sys=5.2
                  "cygbind9-161.dll" v0.0 ts=2019-08-27 12:40
  254k 2020/03/31 C:\cygwin\bin\cygblkid-1.dll - os=4.0 img=0.0 sys=5.2
                  "cygblkid-1.dll" v0.0 ts=2020-03-27 22:22
  133k 2023/05/21 C:\cygwin\bin\cygbrotlicommon-1.dll - os=4.0 img=1.0 sys=5.2
                  "cygbrotlicommon-1.dll" v0.0 ts=2023-05-21 05:39
   46k 2023/05/21 C:\cygwin\bin\cygbrotlidec-1.dll - os=4.0 img=1.0 sys=5.2
                  "cygbrotlidec-1.dll" v0.0 ts=2023-05-21 05:40
   68k 2023/02/12 C:\cygwin\bin\cygbsd-0.dll - os=4.0 img=0.0 sys=5.2
                  "cygbsd-0.dll" v0.0 ts=2023-02-12 12:07
   66k 2019/07/21 C:\cygwin\bin\cygbz2-1.dll - os=4.0 img=0.0 sys=5.2
                  "cygbz2-1.dll" v0.0 ts=2019-07-21 16:05
 1114k 2020/12/24 C:\cygwin\bin\cygcairo-2.dll - os=4.0 img=0.0 sys=5.2
                  "cygcairo-2.dll" v0.0 ts=2020-12-24 14:17
   27k 2020/12/24 C:\cygwin\bin\cygcairo-gobject-2.dll - os=4.0 img=0.0 sys=5.2
                  "cygcairo-gobject-2.dll" v0.0 ts=2020-12-24 14:17
  127k 2020/12/24 C:\cygwin\bin\cygcairo-script-interpreter-2.dll - os=4.0 img=0.0 sys=5.2
                  "cygcairo-script-interpreter-2.dll" v0.0 ts=2020-12-24 14:18
   71k 2018/03/16 C:\cygwin\bin\cygcares-2.dll - os=4.0 img=0.0 sys=5.2
                  "cygcares-2.dll" v0.0 ts=2018-03-15 18:33
   13k 2019/01/02 C:\cygwin\bin\cygcom_err-2.dll - os=4.0 img=0.0 sys=5.2
                  "cygcom_err-2.dll" v0.0 ts=2019-01-01 18:39
  203k 2017/04/25 C:\cygwin\bin\cygcroco-0.6-3.dll - os=4.0 img=0.0 sys=5.2
                  "cygcroco-0.6-3.dll" v0.0 ts=2017-04-25 09:03
  193k 2021/05/20 C:\cygwin\bin\cygcrypt-2.dll - os=4.0 img=0.0 sys=5.2
                  "cygcrypt-2.dll" v0.0 ts=2021-05-20 01:38
 2198k 2021/11/28 C:\cygwin\bin\cygcrypto-1.0.0.dll - os=4.0 img=0.0 sys=5.2
                  "cygcrypto-1.0.0.dll" v0.0 ts=2021-11-28 09:04
 2492k 2023/06/05 C:\cygwin\bin\cygcrypto-1.1.dll - os=4.0 img=0.0 sys=5.2
                  "cygcrypto-1.1.dll" v0.0 ts=2023-06-05 06:34
 3754k 2023/06/05 C:\cygwin\bin\cygcrypto-3.dll - os=4.0 img=0.0 sys=5.2
                  "cygcrypto-3.dll" v0.0 ts=2023-06-05 05:32
  625k 2023/06/03 C:\cygwin\bin\cygcurl-4.dll - os=4.0 img=0.0 sys=5.2
                  "cygcurl-4.dll" v0.0 ts=2023-06-03 14:55
   24k 2014/11/12 C:\cygwin\bin\cygdatrie-1.dll - os=4.0 img=0.0 sys=5.2
                  "cygdatrie-1.dll" v0.0 ts=2014-11-11 23:24
 1552k 2017/09/28 C:\cygwin\bin\cygdb-5.3.dll - os=4.0 img=0.0 sys=5.2
                  "cygdb-5.3.dll" v0.0 ts=2017-09-28 12:05
  267k 2017/08/10 C:\cygwin\bin\cygdbus-1-3.dll - os=4.0 img=0.0 sys=5.2
                  "cygdbus-1-3.dll" v0.0 ts=2017-08-09 22:10
  119k 2017/09/28 C:\cygwin\bin\cygdb_cxx-5.3.dll - os=4.0 img=0.0 sys=5.2
                  "cygdb_cxx-5.3.dll" v0.0 ts=2017-09-28 12:06
  569k 2017/09/28 C:\cygwin\bin\cygdb_sql-5.3.dll - os=4.0 img=0.0 sys=5.2
                  "cygdb_sql-5.3.dll" v0.0 ts=2017-09-28 12:06
   71k 2023/04/15 C:\cygwin\bin\cygdeflate-0.dll - os=4.0 img=0.0 sys=5.2
                  "cygdeflate-0.dll" v0.0 ts=2023-04-15 14:59
 2083k 2019/08/27 C:\cygwin\bin\cygdns-1106.dll - os=4.0 img=0.0 sys=5.2
                  "cygdns-1106.dll" v0.0 ts=2019-08-27 12:39
  174k 2023/02/08 C:\cygwin\bin\cygedit-0.dll - os=4.0 img=0.0 sys=5.2
                  "cygedit-0.dll" v0.0 ts=2023-02-08 07:01
  170k 2023/03/06 C:\cygwin\bin\cygexpat-1.dll - os=4.0 img=0.0 sys=5.2
                  "cygexpat-1.dll" v0.0 ts=2023-03-06 00:33
   30k 2014/10/14 C:\cygwin\bin\cygfam-0.dll - os=4.0 img=0.0 sys=5.2
                  "cygfam-0.dll" v0.0 ts=2014-10-14 13:33
  353k 2020/03/31 C:\cygwin\bin\cygfdisk-1.dll - os=4.0 img=0.0 sys=5.2
                  "cygfdisk-1.dll" v0.0 ts=2020-03-27 22:23
   27k 2015/11/17 C:\cygwin\bin\cygffi-6.dll - os=4.0 img=0.0 sys=5.2
                  "cygffi-6.dll" v0.0 ts=2015-11-17 14:14
   30k 2022/10/23 C:\cygwin\bin\cygffi-8.dll - os=4.0 img=0.0 sys=5.2
                  "cygffi-8.dll" v0.0 ts=2022-10-23 05:44
  220k 2023/01/21 C:\cygwin\bin\cygfido2-1.dll - os=4.0 img=1.12 sys=5.2
                  "cygfido2-1.dll" v0.0 ts=2023-01-21 02:26
  251k 2020/09/13 C:\cygwin\bin\cygfontconfig-1.dll - os=4.0 img=0.0 sys=5.2
                  "cygfontconfig-1.dll" v0.0 ts=2020-09-13 08:50
   27k 2022/12/17 C:\cygwin\bin\cygfontenc-1.dll - os=4.0 img=0.0 sys=5.2
                  "cygfontenc-1.dll" v0.0 ts=2022-12-17 07:09
   60k 2023/01/20 C:\cygwin\bin\cygformw-10.dll - os=4.0 img=0.0 sys=5.2
                  "cygformw-10.dll" v0.0 ts=2023-01-19 22:16
  734k 2023/02/26 C:\cygwin\bin\cygfreetype-6.dll - os=4.0 img=0.0 sys=5.2
                  "cygfreetype-6.dll" v0.0 ts=2023-02-26 09:33
   93k 2016/06/02 C:\cygwin\bin\cygfribidi-0.dll - os=4.0 img=0.0 sys=5.2
                  "cygfribidi-0.dll" v0.0 ts=2016-06-02 09:17
   15k 2018/07/28 C:\cygwin\bin\cygfuse-2.8.dll - os=4.0 img=0.0 sys=5.2
                  "cygfuse-2.8.dll" v0.0 ts=2018-07-28 14:19
   16k 2018/07/28 C:\cygwin\bin\cygfuse-3.2.dll - os=4.0 img=0.0 sys=5.2
                  "cygfuse-3.2.dll" v0.0 ts=2018-07-28 14:19
  144k 2023/05/27 C:\cygwin\bin\cyggc-1.dll - os=4.0 img=0.0 sys=5.2
                  "cyggc-1.dll" v0.0 ts=2023-05-27 03:47
   74k 2023/06/05 C:\cygwin\bin\cyggcc_s-seh-1.dll - os=4.0 img=0.0 sys=5.2
                  "cyggcc_s-seh-1.dll" v0.0 ts=2023-06-05 08:00
  820k 2023/04/08 C:\cygwin\bin\cyggcrypt-20.dll - os=4.0 img=0.0 sys=5.2
                  "cyggcrypt-20.dll" v0.0 ts=2023-04-08 10:23
   49k 2019/07/10 C:\cygwin\bin\cyggdbm-6.dll - os=4.0 img=0.0 sys=5.2
                  "cyggdbm-6.dll" v0.0 ts=2019-07-10 06:53
   13k 2019/07/10 C:\cygwin\bin\cyggdbm_compat-4.dll - os=4.0 img=0.0 sys=5.2
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                  "cygntlm-0.dll" v0.0 ts=2015-03-18 18:15
    7k 2019/08/27 C:\cygwin\bin\cygOptRemarks-8.dll - os=4.0 img=8.0 sys=5.2
                  "cygOptRemarks-8.dll" v0.0 ts=2019-08-26 16:12
 1020k 2020/03/27 C:\cygwin\bin\cygp11-kit-0.dll - os=4.0 img=0.0 sys=5.2
                  "cygp11-kit-0.dll" v0.0 ts=2020-03-27 14:30
   13k 2023/01/20 C:\cygwin\bin\cygpanelw-10.dll - os=4.0 img=0.0 sys=5.2
                  "cygpanelw-10.dll" v0.0 ts=2023-01-19 22:14
  270k 2018/02/12 C:\cygwin\bin\cygpango-1.0-0.dll - os=4.0 img=0.0 sys=5.2
                  "cygpango-1.0-0.dll" v0.0 ts=2018-02-11 16:40
   44k 2018/02/12 C:\cygwin\bin\cygpangocairo-1.0-0.dll - os=4.0 img=0.0 sys=5.2
                  "cygpangocairo-1.0-0.dll" v0.0 ts=2018-02-11 16:41
   72k 2018/02/12 C:\cygwin\bin\cygpangoft2-1.0-0.dll - os=4.0 img=0.0 sys=5.2
                  "cygpangoft2-1.0-0.dll" v0.0 ts=2018-02-11 16:40
   28k 2018/02/12 C:\cygwin\bin\cygpangoxft-1.0-0.dll - os=4.0 img=0.0 sys=5.2
                  "cygpangoxft-1.0-0.dll" v0.0 ts=2018-02-11 16:41
  497k 2021/06/20 C:\cygwin\bin\cygpcre-1.dll - os=4.0 img=0.0 sys=5.2
                  "cygpcre-1.dll" v0.0 ts=2021-06-20 04:53
  620k 2022/12/18 C:\cygwin\bin\cygpcre2-8-0.dll - os=4.0 img=0.0 sys=5.2
                  "cygpcre2-8-0.dll" v0.0 ts=2022-12-18 08:27
   10k 2022/12/18 C:\cygwin\bin\cygpcre2-posix-3.dll - os=4.0 img=0.0 sys=5.2
                  "cygpcre2-posix-3.dll" v0.0 ts=2022-12-18 08:27
 3710k 2023/05/02 C:\cygwin\bin\cygperl5_36.dll - os=4.0 img=0.0 sys=5.2
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   44k 2022/10/06 C:\cygwin\bin\cygpipeline-1.dll - os=4.0 img=0.0 sys=5.2
                  "cygpipeline-1.dll" v0.0 ts=2022-10-06 11:49
  648k 2022/12/17 C:\cygwin\bin\cygpixman-1-0.dll - os=4.0 img=0.0 sys=5.2
                  "cygpixman-1-0.dll" v0.0 ts=2022-12-17 09:47
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   60k 2023/05/06 C:\cygwin\bin\cygpkgconf-4.dll - os=4.0 img=0.0 sys=5.2
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  198k 2023/03/10 C:\cygwin\bin\cygpng16-16.dll - os=4.0 img=0.0 sys=5.2
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   42k 2023/02/19 C:\cygwin\bin\cygpopt-0.dll - os=4.0 img=0.0 sys=5.2
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  138k 2023/02/19 C:\cygwin\bin\cygproc2-0.dll - os=4.0 img=0.0 sys=5.2
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   61k 2021/02/20 C:\cygwin\bin\cygprocps-8.dll - os=4.0 img=0.0 sys=5.2
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   71k 2022/12/26 C:\cygwin\bin\cygpsl-5.dll - os=4.0 img=0.0 sys=5.2
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    8k 2019/12/26 C:\cygwin\bin\cygpspell-15.dll - os=4.0 img=0.0 sys=5.2
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  355k 2023/06/05 C:\cygwin\bin\cygquadmath-0.dll - os=4.0 img=0.0 sys=5.2
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   18k 2020/05/17 C:\cygwin\bin\cygraqm-0.dll - os=4.0 img=0.0 sys=5.2
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  257k 2022/10/08 C:\cygwin\bin\cygreadline7.dll - os=4.0 img=0.0 sys=5.2
                  "cygreadline7.dll" v0.0 ts=2022-10-07 21:37
  212k 2018/02/12 C:\cygwin\bin\cygrsvg-2-2.dll - os=4.0 img=0.0 sys=5.2
                  "cygrsvg-2-2.dll" v0.0 ts=2018-02-11 16:38
   99k 2020/01/09 C:\cygwin\bin\cygsasl2-3.dll - os=4.0 img=0.0 sys=5.2
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   20k 2023/01/15 C:\cygwin\bin\cygsharpyuv-0.dll - os=4.0 img=0.0 sys=5.2
                  "cygsharpyuv-0.dll" v0.0 ts=2023-01-15 13:29
   11k 2015/07/17 C:\cygwin\bin\cygsigsegv-2.dll - os=4.0 img=0.0 sys=5.2
                  "cygsigsegv-2.dll" v0.0 ts=2015-07-17 14:35
   31k 2023/05/20 C:\cygwin\bin\cygSM-6.dll - os=4.0 img=0.0 sys=5.2
                  "cygSM-6.dll" v0.0 ts=2023-05-20 06:35
  156k 2020/03/31 C:\cygwin\bin\cygsmartcols-1.dll - os=4.0 img=0.0 sys=5.2
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  299k 2019/07/28 C:\cygwin\bin\cygsodium-23.dll - os=4.0 img=0.0 sys=5.2
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  248k 2023/06/04 C:\cygwin\bin\cygssh2-1.dll - os=4.0 img=0.0 sys=5.2
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  392k 2021/11/28 C:\cygwin\bin\cygssl-1.0.0.dll - os=4.0 img=0.0 sys=5.2
                  "cygssl-1.0.0.dll" v0.0 ts=2021-11-28 09:04
  512k 2023/06/05 C:\cygwin\bin\cygssl-1.1.dll - os=4.0 img=0.0 sys=5.2
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  591k 2023/06/05 C:\cygwin\bin\cygssl-3.dll - os=4.0 img=0.0 sys=5.2
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 1904k 2023/06/05 C:\cygwin\bin\cygstdc++-6.dll - os=4.0 img=0.0 sys=5.2
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   68k 2019/07/29 C:\cygwin\bin\cygtasn1-6.dll - os=4.0 img=0.0 sys=5.2
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   34k 2017/03/05 C:\cygwin\bin\cygthai-0.dll - os=4.0 img=0.0 sys=5.2
                  "cygthai-0.dll" v0.0 ts=2017-03-04 20:36
   59k 2023/01/20 C:\cygwin\bin\cygticw-10.dll - os=4.0 img=0.0 sys=5.2
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  468k 2022/05/29 C:\cygwin\bin\cygtiff-6.dll - os=4.0 img=0.0 sys=5.2
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   12k 2022/05/29 C:\cygwin\bin\cygtiffxx-6.dll - os=4.0 img=0.0 sys=5.2
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  155k 2022/08/10 C:\cygwin\bin\cygtirpc-3.dll - os=4.0 img=0.0 sys=5.2
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   59k 2023/02/12 C:\cygwin\bin\cygtls-26.dll - os=4.0 img=0.0 sys=5.2
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   73k 2015/02/11 C:\cygwin\bin\cygusb0.dll - os=4.0 img=0.0 sys=5.2
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   27k 2020/03/31 C:\cygwin\bin\cyguuid-1.dll - os=4.0 img=0.0 sys=5.2
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  428k 2023/01/15 C:\cygwin\bin\cygwebp-7.dll - os=4.0 img=0.0 sys=5.2
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   17k 2023/01/15 C:\cygwin\bin\cygwebpdemux-2.dll - os=4.0 img=0.0 sys=5.2
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 1169k 2023/05/20 C:\cygwin\bin\cygX11-6.dll - os=4.0 img=0.0 sys=5.2
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   12k 2022/12/17 C:\cygwin\bin\cygXau-6.dll - os=4.0 img=0.0 sys=5.2
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  393k 2023/05/20 C:\cygwin\bin\cygXaw-7.dll - os=4.0 img=0.0 sys=5.2
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   12k 2022/05/06 C:\cygwin\bin\cygxcb-composite-0.dll - os=4.0 img=0.0 sys=5.2
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   18k 2022/12/17 C:\cygwin\bin\cygxcb-icccm-4.dll - os=4.0 img=0.0 sys=5.2
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   43k 2022/05/06 C:\cygwin\bin\cygxcb-render-0.dll - os=4.0 img=0.0 sys=5.2
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   12k 2022/05/06 C:\cygwin\bin\cygxcb-shm-0.dll - os=4.0 img=0.0 sys=5.2
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   18k 2023/05/20 C:\cygwin\bin\cygxcb-util-1.dll - os=4.0 img=0.0 sys=5.2
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   28k 2022/05/06 C:\cygwin\bin\cygxcb-xfixes-0.dll - os=4.0 img=0.0 sys=5.2
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   11k 2022/12/17 C:\cygwin\bin\cygXinerama-1.dll - os=4.0 img=0.0 sys=5.2
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   64k 2023/05/20 C:\cygwin\bin\cygXpm-4.dll - os=4.0 img=0.0 sys=5.2
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   39k 2022/12/17 C:\cygwin\bin\cygXrandr-2.dll - os=4.0 img=0.0 sys=5.2
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   12k 2022/12/17 C:\cygwin\bin\cygXss-1.dll - os=4.0 img=0.0 sys=5.2
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  344k 2023/05/20 C:\cygwin\bin\cygXt-6.dll - os=4.0 img=0.0 sys=5.2
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   37k 2020/09/06 C:\cygwin\bin\cygxxhash-0.dll - os=4.0 img=0.0 sys=5.2
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   88k 2022/10/15 C:\cygwin\bin\cygz.dll - os=4.0 img=0.0 sys=5.2
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  650k 2023/04/12 C:\cygwin\bin\cygzstd-1.dll - os=4.0 img=0.0 sys=5.2
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 2883k 2023/06/16 C:\cygwin\bin\cygwin1.dll - os=4.0 img=0.0 sys=5.2
                  "cygwin1.dll" v0.0 ts=2023-06-16 07:07
    Cygwin DLL version info:
        DLL version: 3.4.7
        API major: 0
        API minor: 345
        Shared data: 5
        DLL identifier: cygwin1
        Mount registry: 3
        Cygwin registry name: Cygwin
        Installations name: Installations
        Cygdrive default prefix: 
        Build date: 
        Shared id: cygwin1S5


Checking for any Cygwin services... 

Service             : cygsshd             
Display name        : CYGWIN cygsshd
Current State       : Running
Controls Accepted   : Stop
Command             : /usr/sbin/sshd -D
stdin path          : /dev/null
stdout path         : /var/log/cygsshd.log
stderr path         : /var/log/cygsshd.log
Process Type        : Own Process
Startup             : Automatic
Dependencies        : tcpip
Account             : LocalSystem


Cygwin Package Information
Last downloaded files to: C:\cygwin\INSTALL
Last downloaded files from: https://cygwin.mirror.constant.com/

Package                                Version                      Status
_autorebase                            001091-1                     OK
adwaita-icon-theme                     3.26.1-1                     OK
adwaita-themes                         3.22.3-1                     OK
alternatives                           1.3.30c-10                   OK
attr                                   2.5.1-1.20.g0981a7bfe487     OK
base-cygwin                            3.8-2                        OK
base-files                             4.3-3                        OK
bash                                   5.2.15-3                     OK
bc                                     1.07.1-1                     OK
bind-utils                             9.11.9-1                     OK
binutils                               2.40-1                       OK
bzip2                                  1.0.8-1                      OK
ca-certificates                        2023.2.60-1                  OK
coreutils                              9.0-1                        OK
crypto-policies                        20190218-1                   OK
csih                                   0.9.13-1                     OK
cygrunsrv                              1.64-1                       OK
cygutils                               1.4.17-1                     OK
cygwin                                 3.4.7-1                      OK
cygwin-devel                           3.4.7-1                      OK
dash                                   0.5.12-2                     OK
dbus                                   1.10.22-1                    OK
dbus-x11                               1.10.22-1                    OK
dejavu-fonts                           2.37-1                       OK
desktop-file-utils                     0.23-1                       OK
diffutils                              3.10-1                       OK
dos2unix                               7.5.0-1                      OK
dri-drivers                            19.1.6-1                     OK
editrights                             1.04-1                       OK
file                                   5.44-1                       OK
findutils                              4.9.0-1                      OK
gamin                                  0.1.10-15                    OK
gawk                                   5.2.2-1                      OK
gcc-core                               11.4.0-1                     OK
gcc-g++                                11.4.0-1                     OK
gdk-pixbuf2.0-svg                      2.40.20-1                    OK
getent                                 2.18.90-5                    OK
gettext                                0.22-1                       OK
git                                    2.39.0-1                     OK
gnome-menus                            3.13.3-3                     OK
gnupg                                  1.4.23-1                     OK
grep                                   3.11-1                       OK
groff                                  1.22.4-1                     OK
gsettings-desktop-schemas              3.24.1-1                     OK
gtk-update-icon-cache                  3.22.28-1                    OK
gtk2.0-engines-pixmap                  2.24.33-1                    OK
gzip                                   1.12-1                       OK
hicolor-icon-theme                     0.15-1                       OK
hostname                               3.13-1                       OK
inetutils                              2.4-1                        OK
info                                   7.0.3-3                      OK
ipc-utils                              1.1-1                        OK
less                                   608-1                        OK
libargp                                20110921-3                   OK
libaspell15                            0.60.8-1                     OK
libassuan0                             2.5.5-1                      OK
libatk1.0_0                            2.26.1-1                     OK
libatomic1                             11.4.0-1                     OK
libattr1                               2.5.1-1.20.g0981a7bfe487     OK
libbind9_161                           9.11.9-1                     OK
libblkid1                              2.33.1-2                     OK
libbrotlicommon1                       1.0.9-3                      OK
libbrotlidec1                          1.0.9-3                      OK
libbsd0                                0.11.7-3                     OK
libbz2_1                               1.0.8-1                      OK
libcairo2                              1.17.4-1                     OK
libcares2                              1.14.0-1                     OK
libcom_err2                            1.44.5-1                     OK
libcroco0.6_3                          0.6.12-1                     OK
libcrypt2                              4.4.20-1                     OK
libcurl4                               8.1.2-1                      OK
libdatrie1                             0.2.8-1                      OK
libdb5.3                               5.3.28-2                     OK
libdbus1_3                             1.10.22-1                    OK
libdeflate0                            1.18-1                       OK
libdns1106                             9.11.9-1                     OK
libedit0                               20221030-4                   OK
libexpat1                              2.5.0-1                      OK
libfam0                                0.1.10-15                    OK
libfdisk1                              2.33.1-2                     OK
libffi6                                3.2.1-2                      OK
libffi8                                3.4.3-1                      OK
libfido2                               1.12.0-1                     OK
libfontconfig-common                   2.13.1-2                     OK
libfontconfig1                         2.13.1-2                     OK
libfontenc1                            1.1.7-1                      OK
libfreetype6                           2.13.0-1                     OK
libfribidi0                            0.19.7-1                     OK
libgc1                                 8.2.4-1                      OK
libgcc1                                11.4.0-1                     OK
libgcrypt20                            1.10.2-1                     OK
libgdbm6                               1.18.1-1                     OK
libgdbm_compat4                        1.18.1-1                     OK
libgdk_pixbuf2.0_0                     2.36.11-1                    OK
libglapi0                              19.1.6-1                     OK
libglib2.0_0                           2.54.3-1                     OK
libgmp10                               6.2.1-2                      OK
libgnome-menu3_0                       3.13.3-3                     OK
libgnutls30                            3.6.9-1                      OK
libgomp1                               11.4.0-1                     OK
libgpg-error0                          1.37-1                       OK
libgpgme11                             1.9.0-1                      OK
libgraphite2_3                         1.3.14-1                     OK
libgsasl-common                        2.2.0-2                      OK
libgsasl18                             2.2.0-2                      OK
libgsasl7                              1.10.0-1                     OK
libgssapi_krb5_2                       1.15.2-2                     OK
libgtk2.0_0                            2.24.33-1                    OK
libguile2.2_1                          2.2.7-1                      OK
libguile3.0_1                          3.0.9-2                      OK
libharfbuzz0                           7.3.0-1                      OK
libhogweed4                            3.4.1-1                      OK
libICE6                                1.1.1-1                      OK
libiconv2                              1.17-1                       OK
libidn11                               1.33-1                       OK
libidn12                               1.41-1                       OK
libidn2_0                              2.3.4-1                      OK
libimagequant0                         2.10.0-1                     OK
libintl8                               0.22-1                       OK
libirs161                              9.11.9-1                     OK
libisc1100                             9.11.9-1                     OK
libisccfg163                           9.11.9-1                     OK
libisl23                               0.26-1                       OK
libjasper4                             2.0.14-1                     OK
libjbig2                               2.1-2                        OK
libjpeg8                               2.1.5.1-1                    OK
libjson-c-common                       0.16-1                       OK
libjson-c2                             0.12-1                       OK
libk5crypto3                           1.15.2-2                     OK
libkrb5_3                              1.15.2-2                     OK
libkrb5support0                        1.15.2-2                     OK
liblcms2_2                             2.15-1                       OK
libllvm8                               8.0.1-1                      OK
liblmdb0                               0.9.19-1                     OK
libltdl7                               2.4.7-1                      OK
liblwres161                            9.11.9-1                     OK
liblz4_1                               1.9.4-1                      OK
liblzma5                               5.4.3-1                      OK
libmaxminddb0                          1.3.2-1                      OK
libmcpp0                               2.7.2-2                      OK
libmd0                                 1.0.4-3                      OK
libmetalink3                           0.1.3-1                      OK
libmpc3                                1.3.1-1                      OK
libmpfr6                               4.2.0p9-1                    OK
libncursesw10                          6.4-3.20230114               OK
libnettle6                             3.4.1-1                      OK
libnghttp2_14                          1.54.0-1                     OK
libntlm0                               1.4-1                        OK
libopenldap2                           2.6.4-1                      OK
libopenldap2_4_2                       2.6.4-1                      OK
libp11-kit0                            0.23.20-1                    OK
libpango1.0_0                          1.40.14-1                    OK
libpcre1                               8.45-1                       OK
libpcre2-posix3                        10.42-1                      OK
libpcre2_8_0                           10.42-1                      OK
libpipeline1                           1.5.6-1                      OK
libpixman1_0                           0.42.2-1                     OK
libpkgconf3                            1.8.0-1                      OK
libpkgconf4                            1.9.5-1                      OK
libpng16                               1.6.39-1                     OK
libpopt-common                         1.19-1                       OK
libpopt0                               1.19-1                       OK
libproc2_0                             4.0.3-1                      OK
libprocps8                             3.3.17-1                     OK
libpsl5                                0.21.2-1                     OK
libquadmath0                           11.4.0-1                     OK
libraqm0                               0.7.0-1                      OK
libreadline7                           8.2-2                        OK
libretls26                             3.7.0-1                      OK
librsvg2_2                             2.40.20-1                    OK
libsasl2_3                             2.1.27-1                     OK
libsigsegv2                            2.10-2                       OK
libSM6                                 1.2.4-1                      OK
libsmartcols1                          2.33.1-2                     OK
libsodium-common                       1.0.18-1                     OK
libsodium23                            1.0.18-1                     OK
libsqlite3_0                           3.34.0-1                     OK
libssh2_1                              1.11.0-1                     OK
libssl1.0                              1.0.2u+za-1                  OK
libssl1.1                              1.1.1u-1                     OK
libssl3                                3.0.9-0.1                    OK
libstdc++6                             11.4.0-1                     OK
libtasn1_6                             4.14-1                       OK
libthai0                               0.1.26-1                     OK
libtiff6                               4.4.0-1                      OK
libtirpc-common                        1.3.3-1                      OK
libtirpc3                              1.3.3-1                      OK
libunistring2                          0.9.10-1                     OK
libunistring5                          1.1-1                        OK
libusb0                                1.2.6.0-2                    OK
libuuid-devel                          2.33.1-2                     OK
libuuid1                               2.33.1-2                     OK
libwebp7                               1.3.0-1                      OK
libwebpdemux2                          1.3.0-1                      OK
libwebpmux3                            1.3.0-1                      OK
libX11_6                               1.8.4-1                      OK
libXau6                                1.0.11-1                     OK
libXaw7                                1.0.15-1                     OK
libxcb-composite0                      1.15-1                       OK
libxcb-ewmh2                           0.4.2-1                      OK
libxcb-icccm4                          0.4.2-1                      OK
libxcb-image0                          0.4.1-1                      OK
libxcb-render0                         1.15-1                       OK
libxcb-shm0                            1.15-1                       OK
libxcb-util1                           0.4.1-1                      OK
libxcb-xfixes0                         1.15-1                       OK
libxcb1                                1.15-1                       OK
libXcomposite1                         0.4.6-1                      OK
libXcursor1                            1.2.1-1                      OK
libXdamage1                            1.1.6-1                      OK
libXdmcp6                              1.1.4-1                      OK
libXext6                               1.3.5-1                      OK
libXfixes3                             6.0.1-1                      OK
libXfont2_2                            2.0.6-1                      OK
libXft2                                2.3.7-1                      OK
libXi6                                 1.8.1-1                      OK
libXinerama1                           1.1.5-1                      OK
libxkbfile1                            1.1.2-1                      OK
libxml2                                2.10.4-2                     OK
libXmu6                                1.1.4-1                      OK
libXmuu1                               1.1.4-1                      OK
libXpm4                                3.5.16-1                     OK
libXrandr2                             1.5.3-1                      OK
libXrender1                            0.9.11-1                     OK
libXss1                                1.2.4-1                      OK
libXt6                                 1.3.0-1                      OK
libxxhash0                             0.8.0-1                      OK
libzstd1                               1.5.5-1                      OK
login                                  1.13-1                       OK
luit                                   20230201-1                   OK
make                                   4.4.1-2                      OK
man-db                                 2.11.2-1                     OK
mcpp                                   2.7.2-2                      OK
mintty                                 3.6.4-1                      OK
ncurses                                6.4-3.20230114               OK
netcat                                 1.219-2                      OK
openssh                                9.3p1-1                      OK
openssl                                1.1.1u-1                     OK
p11-kit                                0.23.20-1                    OK
p11-kit-trust                          0.23.20-1                    OK
p7zip                                  15.14.1-1                    OK
patch                                  2.7.6-17                     OK
patchutils                             0.4.2-1                      OK
perl                                   5.36.1-1                     OK
perl-Error                             0.17029-3                    OK
perl-JSON-PP                           4.16-2                       OK
perl-TermReadKey                       2.38-4                       OK
perl_autorebase                        5.36.1-1                     OK
perl_base                              5.36.1-1                     OK
ping                                   2.4-1                        OK
pkg-config                             1.9.5-1                      OK
pkgconf                                1.9.5-1                      OK
procmail                               3.22-15                      OK
procps-ng                              4.0.3-1                      OK
publicsuffix-list-dafsa                20230504-1                   OK
pv                                     1.6.20-1                     OK
python-pip-wheel                       19.2.3-1                     OK
python-setuptools-wheel                41.2.0-1                     OK
python3                                3.9.10-1                     OK
Empty package python3-tkinter
python3-tkinter                        3.9.10-1                     OK
python36                               3.6.15-1                     OK
python36-pip                           21.3.1-3                     OK
python36-setuptools                    59.5.0-1                     OK
python39                               3.9.16-1                     OK
python39-babel                         2.12.1-1                     OK
python39-chardet                       4.0.0-2                      OK
python39-docutils                      0.18.1-1                     OK
python39-idna                          3.3-1                        OK
python39-imagesize                     1.3.0-1                      OK
python39-imaging                       8.4.0-1                      OK
python39-iniconfig                     2.0.0-1                      OK
python39-jinja2                        3.1.2-1                      OK
python39-markupsafe                    2.1.2-1                      OK
python39-olefile                       0.46-3                       OK
python39-packaging                     21.3-1                       OK
python39-pip                           23.0.1-1                     OK
python39-platformdirs                  3.1.1-1                      OK
python39-pluggy                        1.0.0-1                      OK
python39-pygments                      2.10.0-1                     OK
python39-pyparsing                     3.0.6-1                      OK
python39-pytest                        7.3.0-1                      OK
python39-requests                      2.27.1-1                     OK
python39-setuptools                    67.6.0-1                     OK
python39-six                           1.16.0-1                     OK
python39-snowballstemmer               2.2.0-1                      OK
python39-sphinx                        4.4.0-1                      OK
python39-sphinxcontrib-serializinghtml 1.1.5-1                      OK
python39-tkinter                       3.9.16-1                     OK
python39-toml                          0.10.2-2                     OK
python39-urllib3                       1.26.7-1                     OK
rebase                                 4.6.3-1                      OK
rsync                                  3.2.7-1                      OK
run                                    1.3.4-2                      OK
sed                                    4.9-1                        OK
setxkbmap                              1.3.4-1                      OK
shared-mime-info                       2.2-1                        OK
tar                                    1.34-1                       OK
tcl                                    8.6.12-1                     OK
tcl-tix                                8.4.3-3                      OK
tcl-tk                                 8.6.12-1                     OK
terminfo                               6.4-3.20230114               OK
terminfo-extra                         6.4-3.20230114               OK
tzcode                                 2023c-1                      OK
tzdata                                 2023c-1                      OK
unzip                                  6.0-18                       OK
util-linux                             2.33.1-2                     OK
vim                                    8.2.4372-1                   OK
vim-common                             8.2.4372-1                   OK
vim-minimal                            8.2.4372-1                   OK
w32api-headers                         11.0.1-1                     OK
w32api-runtime                         11.0.1-1                     OK
weechat                                3.8-1                        OK
wget                                   1.21.4-1                     OK
which                                  2.20-2                       OK
windows-default-manifest               6.4-2                        OK
xauth                                  1.1.2-1                      OK
xcursor-themes                         1.0.7-1                      OK
xdg-user-dirs                          0.16-1                       OK
xinit                                  1.4.2-2                      OK
xkbcomp                                1.4.6-1                      OK
xkeyboard-config                       2.39-1                       OK
xmodmap                                1.0.11-1                     OK
xorg-server                            21.1.8-1                     OK
xorg-server-common                     21.1.8-1                     OK
xrdb                                   1.2.1-1                      OK
xterm                                  380-1                        OK
xwin-xdg-menu                          20210918-1                   OK
xxd                                    8.2.4372-1                   OK
xz                                     5.4.3-1                      OK
zip                                    3.0-13                       OK
zlib0                                  1.2.13-1                     OK
zstd                                   1.5.5-1                      OK

^ permalink raw reply	[flat|nested] 14+ messages in thread

* RE: scp and ssh 'cat' stalls at 64k bytes
  2023-06-23 19:41   ` Chris Roehrig
@ 2023-06-23 23:07     ` Voris, Ben
       [not found]       ` <bced83bb-58c5-f2a8-bc03-578d6d9fd749@house.org>
  0 siblings, 1 reply; 14+ messages in thread
From: Voris, Ben @ 2023-06-23 23:07 UTC (permalink / raw)
  To: Chris Roehrig, cygwin

Using scp from OpenSSH_9.3p1, 30 May 2023, copied a 8317351936 byte file from a remote to Cygwin. sha1sum says it arrived correctly.

Windows Firewall is running.

> -----Original Message-----
> From: Chris Roehrig <croehrig@house.org>
> Sent: 23 June 2023 13:42
> To: cygwin@cygwin.com
> Subject: Re: scp and ssh 'cat' stalls at 64k bytes
> 
> 
> On 2023-06-23 08:28, Brian Inglis wrote:
> > On 2023-06-23 00:26, Chris Roehrig via Cygwin wrote:
> >> I've upgraded cygwin recently (from a much older version) and am
> >> encountering a new problem on all my Win10/WIn11 machines.
> >>
> >> With openssh and pv installed on cygwin (3.4.7-1):
> >>
> >> dd if=/dev/zero bs=1 count=65536 | ssh localhost 'cat > /dev/null'
> >> # works
> >> dd if=/dev/zero bs=1 count=65537 | ssh localhost 'cat > /dev/null'
> >> # stalls (and anything larger)
> >> dd if=/dev/zero bs=1 count=65537 | ssh localhost 'pv > /dev/null'
> >> # replace 'cat' with 'pv' and it works
> >>
> >> This happens with or without Windows Firewall enabled, with any input
> >> > 64k, and also remotely from Linux.
> >> It also seems to affect scp to cygwin which stalls if the file is >= 64k
> >
> > In case equivalent Windows services are running, I check for, shut
> > down, and disable the following Windows services I have seen, or seen
> > warnings about, before trying to start Cygwin services:
> >
> >     ssh ssh-agent sshbroker sshproxy sshd sshdbroker sshdproxy
> >
> > Do you take similar precautions on the Windows systems with issues?
> 
> The only service listed is ssh-agent which is disabled and stopped.
> TaskManager did show many zombie/stuck cat.exe  and scp.exe which I
> terminated, but that did not help.   Nor did rebooting.
> 
> I use ssh, rsync, slogin frequently on these machines to/from windows
> and linux and rsync (over ssh) gigabytes of stuff daily to/from Linux
> and other windows machines with no issues.   It is only this case of
> reading more than 64K from stdin over ssh (and scp) that is hanging.
> 
> > Please show at least the output of `uname -srvmo`,
> CYGWIN_NT-10.0-19045 3.4.7-1.x86_64 2023-06-16 14:04 UTC x86_64 Cygwin
> 
> > and if possible provide a text attachment of the output log from
> > running `cygcheck -hrsv > cygcheck.out`, as suggested under the
> > Problem reports link below.
> I've attached the file.
> 
> 
> I take it then you can't replicate this?    Can you confirm whether this
> command works successfully (i.e. exits without hanging):
> 
> dd if=/dev/zero bs=1 count=65537 | ssh localhost 'cat > /dev/null'
> 
> Are you able to 'scp' large files to cygwin?
> 
> 
> It also hangs if I replace 'cat' with 'sed {}' or 'awk {print}', but not
> with 'pv'.   Those all passthrough stdin>stdout and should behave the
> same as cat.  (pv is basically cat with a progress bar which is omitted
> if there's  no controlling terminal like in this case).
> 
> 
> The curious fact that 'pv' works makes me think it is a Cygwin library
> problem and not anything related to firewall/network/Windows.
> 
> I've verified that cat, pv, and sshd all have the same ACLs.  e.g.
> aquila[77]% icacls pv.exe
> pv.exe AQUILA\croehrig:(F)
>          BUILTIN\Administrators:(RX)
>         Everyone:(RX)

^ permalink raw reply	[flat|nested] 14+ messages in thread

* Re: scp and ssh 'cat' stalls at 64k bytes
       [not found]         ` <MW4PR84MB1684E6210C73D34ED2223319FE23A@MW4PR84MB1684.NAMPRD84.PROD.OUTLOOK.COM>
@ 2023-06-24  0:19           ` Chris Roehrig
  2023-06-24  1:26             ` Dan Harkless
  0 siblings, 1 reply; 14+ messages in thread
From: Chris Roehrig @ 2023-06-24  0:19 UTC (permalink / raw)
  To: cygwin

No worries; I imagine most people don't run sshd on cygwin.  It looks to 
me like the issue involves i/o between sshd and its sub-processes on cygwin.

Is anyone else able to successfully scp large files (>64KB) to cygwin as 
the remote receiving end (with the latest cygwin)?


On 2023-06-23 16:27, Voris, Ben wrote:
> I did not and cannot. Sorry.
>
> Fwiw, pushing from Cygwin to the remote also worked.
>
>> -----Original Message-----
>> From: Chris Roehrig <croehrig@house.org>
>> Sent: 23 June 2023 17:23
>> To: Voris, Ben <ben.voris@hpe.com>
>> Subject: Re: scp and ssh 'cat' stalls at 64k bytes
>>
>> Did you execute the scp on the remote (e.g. Linux) host?     It only
>> fails when cygwin is the remote and target end (i.e. "pushing" to a
>> cygwin host);  "pulling" works fine.
>>
>>
>> On 2023-06-23 16:07, Voris, Ben wrote:
>>> Using scp from OpenSSH_9.3p1, 30 May 2023, copied a 8317351936 byte file from
>> a remote to Cygwin. sha1sum says it arrived correctly.
>>> Windows Firewall is running.
>>>
>>>> -----Original Message-----
>>>> From: Chris Roehrig <croehrig@house.org>
>>>> Sent: 23 June 2023 13:42
>>>> To: cygwin@cygwin.com
>>>> Subject: Re: scp and ssh 'cat' stalls at 64k bytes
>>>>
>>>>
>>>> On 2023-06-23 08:28, Brian Inglis wrote:
>>>>> On 2023-06-23 00:26, Chris Roehrig via Cygwin wrote:
>>>>>> I've upgraded cygwin recently (from a much older version) and am
>>>>>> encountering a new problem on all my Win10/WIn11 machines.
>>>>>>
>>>>>> With openssh and pv installed on cygwin (3.4.7-1):
>>>>>>
>>>>>> dd if=/dev/zero bs=1 count=65536 | ssh localhost 'cat > /dev/null'
>>>>>> # works
>>>>>> dd if=/dev/zero bs=1 count=65537 | ssh localhost 'cat > /dev/null'
>>>>>> # stalls (and anything larger)
>>>>>> dd if=/dev/zero bs=1 count=65537 | ssh localhost 'pv > /dev/null'
>>>>>> # replace 'cat' with 'pv' and it works
>>>>>>
>>>>>> This happens with or without Windows Firewall enabled, with any input
>>>>>>> 64k, and also remotely from Linux.
>>>>>> It also seems to affect scp to cygwin which stalls if the file is >= 64k
>>>>> In case equivalent Windows services are running, I check for, shut
>>>>> down, and disable the following Windows services I have seen, or seen
>>>>> warnings about, before trying to start Cygwin services:
>>>>>
>>>>>       ssh ssh-agent sshbroker sshproxy sshd sshdbroker sshdproxy
>>>>>
>>>>> Do you take similar precautions on the Windows systems with issues?
>>>> The only service listed is ssh-agent which is disabled and stopped.
>>>> TaskManager did show many zombie/stuck cat.exe  and scp.exe which I
>>>> terminated, but that did not help.   Nor did rebooting.
>>>>
>>>> I use ssh, rsync, slogin frequently on these machines to/from windows
>>>> and linux and rsync (over ssh) gigabytes of stuff daily to/from Linux
>>>> and other windows machines with no issues.   It is only this case of
>>>> reading more than 64K from stdin over ssh (and scp) that is hanging.
>>>>
>>>>> Please show at least the output of `uname -srvmo`,
>>>> CYGWIN_NT-10.0-19045 3.4.7-1.x86_64 2023-06-16 14:04 UTC x86_64 Cygwin
>>>>
>>>>> and if possible provide a text attachment of the output log from
>>>>> running `cygcheck -hrsv > cygcheck.out`, as suggested under the
>>>>> Problem reports link below.
>>>> I've attached the file.
>>>>
>>>>
>>>> I take it then you can't replicate this?    Can you confirm whether this
>>>> command works successfully (i.e. exits without hanging):
>>>>
>>>> dd if=/dev/zero bs=1 count=65537 | ssh localhost 'cat > /dev/null'
>>>>
>>>> Are you able to 'scp' large files to cygwin?
>>>>
>>>>
>>>> It also hangs if I replace 'cat' with 'sed {}' or 'awk {print}', but not
>>>> with 'pv'.   Those all passthrough stdin>stdout and should behave the
>>>> same as cat.  (pv is basically cat with a progress bar which is omitted
>>>> if there's  no controlling terminal like in this case).
>>>>
>>>>
>>>> The curious fact that 'pv' works makes me think it is a Cygwin library
>>>> problem and not anything related to firewall/network/Windows.
>>>>
>>>> I've verified that cat, pv, and sshd all have the same ACLs.  e.g.
>>>> aquila[77]% icacls pv.exe
>>>> pv.exe AQUILA\croehrig:(F)
>>>>            BUILTIN\Administrators:(RX)
>>>>           Everyone:(RX)


^ permalink raw reply	[flat|nested] 14+ messages in thread

* Re: scp and ssh 'cat' stalls at 64k bytes
  2023-06-24  0:19           ` Chris Roehrig
@ 2023-06-24  1:26             ` Dan Harkless
  2023-06-24  1:59               ` Chris Roehrig
  0 siblings, 1 reply; 14+ messages in thread
From: Dan Harkless @ 2023-06-24  1:26 UTC (permalink / raw)
  To: cygwin

On 6/23/2023 5:19 PM, Chris Roehrig via Cygwin wrote:
> No worries; I imagine most people don't run sshd on cygwin.

Hmm, I'd generally think the opposite, at least for users coming from 
more UNIXey / Linuxey backgrounds.

> It looks to
> me like the issue involves i/o between sshd and its sub-processes on cygwin.
>
> Is anyone else able to successfully scp large files (>64KB) to cygwin as
> the remote receiving end (with the latest cygwin)?

Yes, with all Cygwin64 updates, I was able to scp a file of a few MB 
from Linux to Windows 10 with no issues.  I also tried your 'cat' 
version, and that worked fine too.

--
Dan Harkless
http://harkless.org/dan/


^ permalink raw reply	[flat|nested] 14+ messages in thread

* Re: scp and ssh 'cat' stalls at 64k bytes
  2023-06-24  1:26             ` Dan Harkless
@ 2023-06-24  1:59               ` Chris Roehrig
  2023-06-24  2:19                 ` Dan Harkless
                                   ` (2 more replies)
  0 siblings, 3 replies; 14+ messages in thread
From: Chris Roehrig @ 2023-06-24  1:59 UTC (permalink / raw)
  To: cygwin



On 2023-06-23 18:26, Dan Harkless via Cygwin wrote:
> On 6/23/2023 5:19 PM, Chris Roehrig via Cygwin wrote:
>> No worries; I imagine most people don't run sshd on cygwin.
>
> Hmm, I'd generally think the opposite, at least for users coming from 
> more UNIXey / Linuxey backgrounds.
>
>> It looks to
>> me like the issue involves i/o between sshd and its sub-processes on 
>> cygwin.
>>
>> Is anyone else able to successfully scp large files (>64KB) to cygwin as
>> the remote receiving end (with the latest cygwin)?
>
> Yes, with all Cygwin64 updates, I was able to scp a file of a few MB 
> from Linux to Windows 10 with no issues.  I also tried your 'cat' 
> version, and that worked fine too.
>
> -- 
> Dan Harkless
> http://harkless.org/dan/
>
>

Thanks.  There must be some issue with my setup.   Very odd that 'pv' 
works, but 'cat' does not.  ldd shows they use identical libs.   I guess 
I'll start with the pv and cat source.

^ permalink raw reply	[flat|nested] 14+ messages in thread

* Re: scp and ssh 'cat' stalls at 64k bytes
  2023-06-24  1:59               ` Chris Roehrig
@ 2023-06-24  2:19                 ` Dan Harkless
  2023-06-24  5:35                   ` Brian Inglis
  2023-06-24  7:12                 ` Kevin Schnitzius
  2023-07-05 19:20                 ` Andrey Repin
  2 siblings, 1 reply; 14+ messages in thread
From: Dan Harkless @ 2023-06-24  2:19 UTC (permalink / raw)
  To: cygwin

On 6/23/2023 6:59 PM, Chris Roehrig via Cygwin wrote:
> On 2023-06-23 18:26, Dan Harkless via Cygwin wrote:
> > On 6/23/2023 5:19 PM, Chris Roehrig via Cygwin wrote:
> > Yes, with all Cygwin64 updates, I was able to scp a file of a few MB 
> > from Linux to Windows 10 with no issues.  I also tried your 'cat' 
> > version, and that worked fine too.
>
> Thanks.  There must be some issue with my setup.   Very odd that 'pv'
> works, but 'cat' does not.  ldd shows they use identical libs.   I guess
> I'll start with the pv and cat source.

Before you resort to trawling through source, did you try a fresh Cygwin 
install (either to a different directory, or after temporarily moving 
your current tree)? Sometimes, e.g. if you use the same "packages" 
directory between two different versions of Windows, I've found that 
Cygwin can get screwed up in strange ways.

--
Dan Harkless
http://harkless.org/dan/


^ permalink raw reply	[flat|nested] 14+ messages in thread

* Re: scp and ssh 'cat' stalls at 64k bytes
  2023-06-24  2:19                 ` Dan Harkless
@ 2023-06-24  5:35                   ` Brian Inglis
  2023-06-24  6:16                     ` Dan Harkless
  2023-06-24  7:47                     ` Chris Roehrig
  0 siblings, 2 replies; 14+ messages in thread
From: Brian Inglis @ 2023-06-24  5:35 UTC (permalink / raw)
  To: cygwin; +Cc: Dan Harkless, Chris Roehrig

On 2023-06-23 20:19, Dan Harkless via Cygwin wrote:
> On 6/23/2023 6:59 PM, Chris Roehrig via Cygwin wrote:
>> On 2023-06-23 18:26, Dan Harkless via Cygwin wrote:
>>> On 6/23/2023 5:19 PM, Chris Roehrig via Cygwin wrote:
>>> Yes, with all Cygwin64 updates, I was able to scp a file of a few MB 
>>> from Linux to Windows 10 with no issues. I also tried your 'cat'
>>> version, and that worked fine too.

>> Thanks. There must be some issue with my setup. Very odd that 'pv'
>> works, but 'cat' does not.  ldd shows they use identical libs.   I guess
>> I'll start with the pv and cat source.

> Before you resort to trawling through source, did you try a fresh Cygwin install 
> (either to a different directory, or after temporarily moving your current 
> tree)? Sometimes, e.g. if you use the same "packages" directory between two 
> different versions of Windows, I've found that Cygwin can get screwed up in 
> strange ways.

The -l|--local-package-dir DIR Local package directory just saves the downloaded 
tar file in case you want to do a reinstallation.
I would expect trying to share the same -R|--root DIR Root installation 
directory between different systems, when you can really only install on one, 
and each host system requires specific unique keys to be generated, could give 
you questionable setups.

Just try `cygcheck -c openssh coreutils pv` on each system to make sure the 
installs say OK, or run setup-x86_64 and Reinstall any faulty package.

On each system have you run /usr/bin/ssh-user-config, and run 
/usr/bin/ssh-host-config from an elevated admin account, customized or added 
host keys appropriately to /etc/sshd_config, /etc/ssh_config,
~/.ssh/{config,known_hosts,authorized_keys}, /etc/ssh/ssh_host_*_key.pub?

-- 
Take care. Thanks, Brian Inglis              Calgary, Alberta, Canada

La perfection est atteinte                   Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter  not when there is no more to add
mais lorsqu'il n'y a plus rien à retirer     but when there is no more to cut
                                 -- Antoine de Saint-Exupéry

^ permalink raw reply	[flat|nested] 14+ messages in thread

* Re: scp and ssh 'cat' stalls at 64k bytes
  2023-06-24  5:35                   ` Brian Inglis
@ 2023-06-24  6:16                     ` Dan Harkless
  2023-06-24  7:47                     ` Chris Roehrig
  1 sibling, 0 replies; 14+ messages in thread
From: Dan Harkless @ 2023-06-24  6:16 UTC (permalink / raw)
  To: cygwin

On 6/23/2023 10:35 PM, Brian Inglis wrote:
> On 2023-06-23 20:19, Dan Harkless via Cygwin wrote:
> > Before you resort to trawling through source, did you try a fresh Cygwin install 
> > (either to a different directory, or after temporarily moving your current 
> > tree)?  Sometimes, e.g. if you use the same "packages" directory between two 
> > different versions of Windows, I've found that Cygwin can get screwed up in 
> > strange ways.
>
> The -l|--local-package-dir DIR Local package directory just saves the downloaded
> tar file in case you want to do a reinstallation.
> I would expect trying to share the same -R|--root DIR Root installation
> directory between different systems, when you can really only install on one,
> and each host system requires specific unique keys to be generated, could give
> you questionable setups.

No, I'm not talking about sharing the same install tree between major 
versions of Windows, just the downloaded "packages" directory.  I 
realize it's just supposed to be a download cache, but I promise I've 
had mysterious failures that were only resolved by using a separate 
packages dir for each multi-boot OS.  It's possible this only occurred 
in the past due to setup[...].exe bugs which have since been fixed, but 
Chris' mysterious ssh issue (and his mention of upgrading from a much 
older Cygwin version, and using both Windows 10 and Windows 11) reminded 
me of the strange things I used to sometimes experience before I stopped 
sharing the packages directory across OSes.

--
Dan Harkless
http://harkless.org/dan/


^ permalink raw reply	[flat|nested] 14+ messages in thread

* Re: scp and ssh 'cat' stalls at 64k bytes
  2023-06-24  1:59               ` Chris Roehrig
  2023-06-24  2:19                 ` Dan Harkless
@ 2023-06-24  7:12                 ` Kevin Schnitzius
  2023-06-24  8:45                   ` Chris Roehrig
  2023-07-05 19:20                 ` Andrey Repin
  2 siblings, 1 reply; 14+ messages in thread
From: Kevin Schnitzius @ 2023-06-24  7:12 UTC (permalink / raw)
  To: cygwin, Chris Roehrig

 On Friday, June 23, 2023 at 10:00:02 PM EDT, Chris Roehrig via Cygwin <cygwin@cygwin.com> wrote: 

> Thanks.  There must be some issue with my setup.   Very odd that 'pv' 
> works, but 'cat' does not.  ldd shows they use identical libs.   I guess 
> I'll start with the pv and cat source.

Try this first:
/usr/bin/dd if=/dev/zero bs=1 count=65536 | /usr/bin/ssh localhost '/usr/bin/cat > /dev/null'

Also, I assume you are running Cygwin's bash in a mintty term...

Kevin

^ permalink raw reply	[flat|nested] 14+ messages in thread

* Re: scp and ssh 'cat' stalls at 64k bytes
  2023-06-24  5:35                   ` Brian Inglis
  2023-06-24  6:16                     ` Dan Harkless
@ 2023-06-24  7:47                     ` Chris Roehrig
  1 sibling, 0 replies; 14+ messages in thread
From: Chris Roehrig @ 2023-06-24  7:47 UTC (permalink / raw)
  To: cygwin



On 2023-06-23 22:35, Brian Inglis wrote:
> On 2023-06-23 20:19, Dan Harkless via Cygwin wrote:
> Before you resort to trawling through source, did you try a fresh 
> Cygwin install (either to a different directory, or after temporarily 
> moving your current tree)? Sometimes, e.g. if you use the same 
> "packages" directory between two different versions of Windows, I've 
> found that Cygwin can get screwed up in strange ways.

Good thought.   Yes, one of my machines is a new Win11 with a fresh Cygwin.


> On each system have you run /usr/bin/ssh-user-config, and run 
> /usr/bin/ssh-host-config from an elevated admin account, customized or 
> added host keys appropriately to /etc/sshd_config, /etc/ssh_config,
> ~/.ssh/{config,known_hosts,authorized_keys}, /etc/ssh/ssh_host_*_key.pub?
>

  I think they're all set up correctly.    ssh/slogin/rsync/scp all work 
great and have been for years.   It's only this weird issue in specific 
cases with files > 64K.




^ permalink raw reply	[flat|nested] 14+ messages in thread

* Re: scp and ssh 'cat' stalls at 64k bytes
  2023-06-24  7:12                 ` Kevin Schnitzius
@ 2023-06-24  8:45                   ` Chris Roehrig
  0 siblings, 0 replies; 14+ messages in thread
From: Chris Roehrig @ 2023-06-24  8:45 UTC (permalink / raw)
  To: cygwin



On 2023-06-24 00:12, Kevin Schnitzius wrote:
>   On Friday, June 23, 2023 at 10:00:02 PM EDT, Chris Roehrig via Cygwin <cygwin@cygwin.com> wrote:
>
>> Thanks.  There must be some issue with my setup.   Very odd that 'pv'
>> works, but 'cat' does not.  ldd shows they use identical libs.   I guess
>> I'll start with the pv and cat source.
> Try this first:
> /usr/bin/dd if=/dev/zero bs=1 count=65536 | /usr/bin/ssh localhost '/usr/bin/cat > /dev/null'
Good thought.   No change.   NB:  65536 always works fine. Anything 
greater (e.g. 65537)  does not work.
> Also, I assume you are running Cygwin's bash in a mintty term...
Yes, same results with both mintty  (Administrator or not) or slogged in 
remotely.

I found another one that works:  tee.

So these work fine (and /dev/null can be replaced by any file or 
omitted; doesn't matter):
dd if=/dev/urandom bs=1 count=65537 | ssh localhost 'wc'  # WORKS
dd if=/dev/urandom bs=1 count=65537 | ssh localhost 'tee /dev/null | cat 
 > /dev/null'    # WORKS
dd if=/dev/urandom bs=1 count=65537 | ssh localhost 'pv | cat > 
/dev/null'    # WORKS
dd if=/dev/urandom bs=1 count=65536 | ssh localhost 'cat > /dev/null'   
# WORKS


These don't:
dd if=/dev/urandom bs=1 count=65537 | ssh localhost 'cat | wc'   # STALLS
dd if=/dev/urandom bs=1 count=65537 | ssh localhost 'cat > /dev/null'   
# STALLS
dd if=/dev/urandom bs=1 count=65537 | ssh localhost 'awk {print} > 
/dev/null'   # STALLS
dd if=/dev/urandom bs=1 count=65537 | ssh localhost 'sed {} > /dev/null' 
   # STALLS


So pv, tee, and wc work,  but cat, sed, awk get hung up.

I also tried a simple python 3.9 implementation of 'cat' which works, 
and a gcc-compiled getchar/putchar one which stalls (which gives me 
something to work with).



^ permalink raw reply	[flat|nested] 14+ messages in thread

* Re: scp and ssh 'cat' stalls at 64k bytes
  2023-06-24  1:59               ` Chris Roehrig
  2023-06-24  2:19                 ` Dan Harkless
  2023-06-24  7:12                 ` Kevin Schnitzius
@ 2023-07-05 19:20                 ` Andrey Repin
  2 siblings, 0 replies; 14+ messages in thread
From: Andrey Repin @ 2023-07-05 19:20 UTC (permalink / raw)
  To: Chris Roehrig, cygwin

Greetings, Chris Roehrig!

> On 2023-06-23 18:26, Dan Harkless via Cygwin wrote:
>> On 6/23/2023 5:19 PM, Chris Roehrig via Cygwin wrote:
>>> No worries; I imagine most people don't run sshd on cygwin.
>>
>> Hmm, I'd generally think the opposite, at least for users coming from > more UNIXey / Linuxey backgrounds.
>>
>>> It looks to
>>> me like the issue involves i/o between sshd and its sub-processes on >> cygwin.
>>>
>>> Is anyone else able to successfully scp large files (>64KB) to cygwin as
>>> the remote receiving end (with the latest cygwin)?
>>
>> Yes, with all Cygwin64 updates, I was able to scp a file of a few MB > from Linux to Windows 10 with no issues.  I also tried your 'cat' > version, and that worked fine too.
>>
>> -- > Dan Harkless
>> http://harkless.org/dan/
>>
>>

> Thanks.  There must be some issue with my setup.   Very odd that 'pv'
> works, but 'cat' does not.  ldd shows they use identical libs.   I guess
> I'll start with the pv and cat source.

Try
rebase-trigger full
and run setup afterwars.
Try running cygcheck against installed packages (or just install a new copy of
Cygwin into a separate directory) to exclude possible locked files in update.

$ dd if=/dev/zero bs=65537 count=1 | ssh localhost -- cat > /dev/null
The authenticity of host 'localhost (::1)' can't be established.
ED25519 key fingerprint is SHA256:rK/5qL4K+LBmYS2LfQQH1dT4fmB7+Oi7YlWLTDJvPRU.
This key is not known by any other names.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added 'localhost' (ED25519) to the list of known hosts.
1+0 records in
1+0 records out
65537 bytes (66 kB, 64 KiB) copied, 7.67032 s, 8.5 kB/s

$ dd if=/dev/zero bs=64k count=1M | ssh localhost -- cat > /dev/null
1048576+0 records in
1048576+0 records out
68719476736 bytes (69 GB, 64 GiB) copied, 670.787 s, 102 MB/s


-- 
With best regards,
Andrey Repin
Wednesday, July 5, 2023 22:17:23

Sorry for my terrible english...

^ permalink raw reply	[flat|nested] 14+ messages in thread

end of thread, other threads:[~2023-11-06 17:31 UTC | newest]

Thread overview: 14+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2023-06-23  6:26 scp and ssh 'cat' stalls at 64k bytes Chris Roehrig
2023-06-23 15:28 ` Brian Inglis
2023-06-23 19:41   ` Chris Roehrig
2023-06-23 23:07     ` Voris, Ben
     [not found]       ` <bced83bb-58c5-f2a8-bc03-578d6d9fd749@house.org>
     [not found]         ` <MW4PR84MB1684E6210C73D34ED2223319FE23A@MW4PR84MB1684.NAMPRD84.PROD.OUTLOOK.COM>
2023-06-24  0:19           ` Chris Roehrig
2023-06-24  1:26             ` Dan Harkless
2023-06-24  1:59               ` Chris Roehrig
2023-06-24  2:19                 ` Dan Harkless
2023-06-24  5:35                   ` Brian Inglis
2023-06-24  6:16                     ` Dan Harkless
2023-06-24  7:47                     ` Chris Roehrig
2023-06-24  7:12                 ` Kevin Schnitzius
2023-06-24  8:45                   ` Chris Roehrig
2023-07-05 19:20                 ` Andrey Repin

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