* cygwin.dll: bug with select on Windows console
@ 2015-12-28 1:50 john hood
2016-01-02 2:06 ` John Hood
` (2 more replies)
0 siblings, 3 replies; 18+ messages in thread
From: john hood @ 2015-12-28 1:50 UTC (permalink / raw)
To: cygwin
[-- Attachment #1: Type: text/plain, Size: 1801 bytes --]
Hi all,
I'm one of the Mosh maintainers. Recently a user reported a problem
where Mosh exits suddenly soon after startup while he is typing at it,
see <https://github.com/mobile-shell/mosh/issues/705>.
The problem turns out to be that occasionally, select() times out,
returns 0 as it should, but does *not* clear the fd_sets() passed in--
they are left unaltered. Mosh doesn't pay any attention to the count of
ready fds and relies on the returned fd_sets being accurate. Mosh sets
the read fd_set and the error fd_set, and when it encounters this
situation, it exits quietly when an error is found on one of the files
involved (rather poor error handling on our part).
This only seems to happen on Windows Console. select() seems to operate
reliably when used on a pty, whether from mintty, xterm, or sshd.
My read of the POSIX standard is that select() should always set the
fd_sets on a successful return (rv >= 0). There is a bit of ambiguity
around this point, but given that Cygwin is inconsistent with itself (on
ptys) and with every other Unix platform, I think it's a bug.
I've attached a little demo program for the bug. Compile, run as
"socket-t 1000" (the argument is the number of microseconds select()
should wait), and mash keys on the keyboard for a little while. It
should report errors within 100 keystrokes. I think there might be a
dependency on the length of the wait passed to select(), I don't see the
problem happening with the wait set to 100 seconds.
The workaround in Mosh is easy enough, just clear the fd_sets if
select() returns 0 (or run Mosh from mintty, which is much better for
Mosh anyway).
It seems to exist in all 3 versions of cygwin.dll available to me in
setup.exe, 2.2.1-1, 2.3.1-1 and 2.4.0-0.16, so not a recent regression.
regards,
--jh
[-- Attachment #2: cygcheck.txt --]
[-- Type: text/plain, Size: 91389 bytes --]
Cygwin Configuration Diagnostics
Current System Time: Mon Dec 28 06:34:29 2015
Windows 7 Professional Ver 6.1 Build 7601 Service Pack 1
Running under WOW64 on AMD64
Running in Terminal Service session
Path: C:\cygwin\usr\local\bin
C:\cygwin\bin
C:\ProgramData\Oracle\Java\javapath
C:\Program Files\Common Files\Microsoft Shared\Windows Live
C:\Program Files (x86)\Common Files\Microsoft Shared\Windows Live
C:\Windows\system32
C:\Windows
C:\Windows\System32\Wbem
C:\Windows\System32\WindowsPowerShell\v1.0
C:\Program Files\ThinkPad\Bluetooth Software
C:\Program Files\ThinkPad\Bluetooth Software\syswow64
C:\Program Files (x86)\ATI Technologies\ATI.ACE\Core-Static
C:\Program Files (x86)\Common Files\Lenovo
C:\Program Files (x86)\Windows Live\Shared
C:\SWTOOLS\ReadyApps
C:\cygwin\etc
C:\cygwin\sbin
C:\cygwin\usr\sbin
C:\cygwin\usr\local\etc
C:\cygwin\home\cgull\bin
.
Output from C:\cygwin\bin\id.exe
UID: 1000(cgull) GID: 513(None)
513(None) 1001(HomeUsers)
545(Users) 4(INTERACTIVE)
66049(CONSOLE LOGON) 11(Authenticated Users)
15(This Organization) 113(Local account)
4095(CurrentSession) 66048(LOCAL)
262154(NTLM Authentication) 401408(Medium Mandatory Level)
SysDir: C:\Windows\system32
WinDir: C:\Windows
USER = 'cgull'
PWD = '/home/cgull/src/mosh-keithw'
HOME = '/home/cgull'
HOMEPATH = '\Users\cgull'
READYAPPS = 'C:\SWTOOLS\ReadyApps'
APPDATA = 'C:\Users\cgull\AppData\Roaming'
ProgramW6432 = 'C:\Program Files'
HOSTNAME = 'minibit'
TVTCOMMON = 'C:\Program Files (x86)\Common Files\Lenovo'
SHELL = '/bin/bash'
TERM = 'cygwin'
PROCESSOR_IDENTIFIER = 'AMD64 Family 20 Model 1 Stepping 0, AuthenticAMD'
FXTTY = '1502:9:4bf:d1f:0:0:0:0:4:7f:3:15:16:1:1c:12:11:13:1a:1a:0:17'
PROFILEREAD = 'true'
WINDIR = 'C:\Windows'
TRNINIT = '-B -e -f -I -N -r -s -T -v'
TVT = 'C:\Program Files (x86)\Lenovo'
PUBLIC = 'C:\Users\Public'
OLDPWD = '/home/cgull'
ORIGINAL_PATH = '/cygdrive/c/ProgramData/Oracle/Java/javapath:/cygdrive/c/Program Files/Common Files/Microsoft Shared/Windows Live:/cygdrive/c/Program Files (x86)/Common Files/Microsoft Shared/Windows Live:/cygdrive/c/Windows/system32:/cygdrive/c/Windows:/cygdrive/c/Windows/System32/Wbem:/cygdrive/c/Windows/System32/WindowsPowerShell/v1.0:/cygdrive/c/Program Files/ThinkPad/Bluetooth Software:/cygdrive/c/Program Files/ThinkPad/Bluetooth Software/syswow64:/cygdrive/c/Program Files (x86)/ATI Technologies/ATI.ACE/Core-Static:/cygdrive/c/Program Files (x86)/Common Files/Lenovo:/cygdrive/c/Program Files (x86)/Windows Live/Shared:/cygdrive/c/SWTOOLS/ReadyApps'
USERDOMAIN = 'minibit'
TSMPATH = 'C:\Program Files\ThinkPad\UltraNav Utility'
COMMPath = 'C:\Program Files\Lenovo\Communications Utility'
CommonProgramFiles(x86) = 'C:\Program Files (x86)\Common Files'
OS = 'Windows_NT'
ALLUSERSPROFILE = 'C:\ProgramData'
TEMP = '/tmp'
COMMONPROGRAMFILES = 'C:\Program Files (x86)\Common Files'
ENV = '/home/cgull/.shrc'
configsetroot = 'C:\Windows\ConfigSetRoot'
USERNAME = 'cgull'
PAGER = 'less'
PROCESSOR_LEVEL = '20'
ProgramFiles(x86) = 'C:\Program Files (x86)'
PSModulePath = 'C:\Windows\system32\WindowsPowerShell\v1.0\Modules\'
BLOCKSIZE = '1024'
FP_NO_HOST_CHECK = 'NO'
SYSTEMDRIVE = 'C:'
PROCESSOR_ARCHITEW6432 = 'AMD64'
BTDT = 'yes'
EDITOR = 'emacs'
TRPATH = 'C:\Program Files (x86)\Lenovo\Screen Reading Optimizer\'
LANG = 'en_US.UTF-8'
USERPROFILE = 'C:\Users\cgull'
CLIENTNAME = 'minipixel.local'
TZ = 'America/New_York'
PS1 = 'cgull@minibit:${PWD} $? \$ '
LOGONSERVER = '\\MINIBIT'
CommonProgramW6432 = 'C:\Program Files\Common Files'
PROCESSOR_ARCHITECTURE = 'x86'
LOCALAPPDATA = 'C:\Users\cgull\AppData\Local'
!C: = 'C:\cygwin\bin'
SWSHARE = 'C:\SWSHARE'
ProgramData = 'C:\ProgramData'
EXECIGNORE = '*.dll'
SHLVL = '1'
PATHEXT = '.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC'
HOMEDRIVE = 'C:'
PROMPT = '$P$G'
COMSPEC = 'C:\Windows\system32\cmd.exe'
TMP = '/tmp'
SYSTEMROOT = 'C:\Windows'
MPAGE = '-Pps -bletter -2 -H'
PRINTER = '\\http://gw.glup.org:631\hl-2040'
PROCESSOR_REVISION = '0100'
CSCOPE_VIEWER = '/home/cgull/bin/cemacs'
INFOPATH = '/usr/local/info:/usr/share/info:/usr/info'
PROGRAMFILES = 'C:\Program Files (x86)'
NUMBER_OF_PROCESSORS = '2'
SESSIONNAME = 'RDP-Tcp#0'
COMPUTERNAME = 'MINIBIT'
XAUTHORITY = '/home/cgull/.Xauthority'
_ = '/usr/bin/cygcheck'
HKEY_CURRENT_USER\Software\Cygwin
HKEY_CURRENT_USER\Software\Cygwin\Installations
(default) = '\??\C:\cygwin'
6110ccb9d1ee5e16 = '\??\C:\cygwin\home\cgull\src'
HKEY_CURRENT_USER\Software\Cygwin\Program Options
HKEY_CURRENT_USER\Software\Cygwin\setup
HKEY_CURRENT_USER\Software\Classes\VirtualStore\MACHINE\SOFTWARE\Classes\XLaunch.cygwin
HKEY_CURRENT_USER\Software\Classes\VirtualStore\MACHINE\SOFTWARE\Classes\XLaunch.cygwin\DefaultIcon
(default) = 'C:\cygwin\bin\xlaunch.exe,1'
HKEY_CURRENT_USER\Software\Classes\VirtualStore\MACHINE\SOFTWARE\Classes\XLaunch.cygwin\Shell
HKEY_CURRENT_USER\Software\Classes\VirtualStore\MACHINE\SOFTWARE\Classes\XLaunch.cygwin\Shell\Edit
HKEY_CURRENT_USER\Software\Classes\VirtualStore\MACHINE\SOFTWARE\Classes\XLaunch.cygwin\Shell\Edit\command
(default) = '"C:\cygwin\bin\run" --quote "C:\cygwin\bin\bash" -l -c "xlaunch -load \"$(cygpath '%1')\""'
HKEY_CURRENT_USER\Software\Classes\VirtualStore\MACHINE\SOFTWARE\Classes\XLaunch.cygwin\Shell\Open
HKEY_CURRENT_USER\Software\Classes\VirtualStore\MACHINE\SOFTWARE\Classes\XLaunch.cygwin\Shell\Open\command
(default) = '"C:\cygwin\bin\run" --quote "C:\cygwin\bin\bash" -l -c "xlaunch -run \"$(cygpath '%1')\""'
HKEY_CURRENT_USER\Software\Classes\VirtualStore\MACHINE\SOFTWARE\Cygwin
HKEY_CURRENT_USER\Software\Classes\VirtualStore\MACHINE\SOFTWARE\Cygwin\Installations
(default) = '\??\C:\cygwin'
HKEY_CURRENT_USER\Software\Classes\VirtualStore\MACHINE\SOFTWARE\Cygwin\Program Options
HKEY_CURRENT_USER\Software\Classes\VirtualStore\MACHINE\SOFTWARE\Cygwin\setup
(default) = 'C:\cygwin'
HKEY_LOCAL_MACHINE\SOFTWARE\Cygwin
HKEY_LOCAL_MACHINE\SOFTWARE\Cygwin\Installations
(default) = '\??\C:\cygwin'
HKEY_LOCAL_MACHINE\SOFTWARE\Cygwin\Program Options
HKEY_LOCAL_MACHINE\SOFTWARE\Cygwin\setup
(default) = 'C:\cygwin'
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\XLaunch.cygwin
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\XLaunch.cygwin\DefaultIcon
(default) = 'C:\cygwin\bin\xlaunch.exe,1'
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\XLaunch.cygwin\Shell
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\XLaunch.cygwin\Shell\Edit
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\XLaunch.cygwin\Shell\Edit\command
(default) = '"C:\cygwin\bin\run" --quote "C:\cygwin\bin\bash" -l -c "xlaunch -load \"$(cygpath '%1')\""'
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\XLaunch.cygwin\Shell\Open
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\XLaunch.cygwin\Shell\Open\command
(default) = '"C:\cygwin\bin\run" --quote "C:\cygwin\bin\bash" -l -c "xlaunch -run \"$(cygpath '%1')\""'
obcaseinsensitive set to 1
Cygwin installations found in the registry:
System: Key: c5e39b7a9d22bafb Path: C:\cygwin
User: Key: c5e39b7a9d22bafb Path: C:\cygwin
User: Key: 6110ccb9d1ee5e16 Path: C:\cygwin\home\cgull\src (ORPHANED)
c: hd NTFS 86213Mb 98% CP CS UN PA FC Windows7_OS
q: hd NTFS 9999Mb 74% CP CS UN PA FC Lenovo_Recovery
r: hd NTFS 1199Mb 24% CP CS UN PA FC SYSTEM_DRV
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,auto
Found: C:\cygwin\bin\awk
-> C:\cygwin\bin\gawk.exe
Found: C:\cygwin\bin\bash.exe
Found: C:\cygwin\bin\cat.exe
Found: C:\cygwin\bin\cp.exe
Found: C:\cygwin\bin\cpp.exe
Not Found: crontab
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\gcc.exe
Found: C:\cygwin\bin\gdb.exe
Found: C:\cygwin\bin\grep.exe
Found: C:\cygwin\bin\kill.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
Not Found: patch
Found: C:\cygwin\bin\perl.exe
Found: C:\cygwin\bin\rm.exe
Found: C:\cygwin\bin\sed.exe
Found: C:\cygwin\bin\ssh.exe
Found: C:\cygwin\bin\sh.exe
Found: C:\cygwin\bin\tar.exe
Found: C:\cygwin\bin\test.exe
Found: C:\cygwin\bin\vi.exe
Not Found: vim
3435k 2015/12/21 .\cygwin1.dll - os=4.0 img=1.0 sys=4.0
"cygwin1.dll" v0.0 ts=2015-12-21 17:18
Cygwin DLL version info:
DLL version: 2.4.0
DLL epoch: 19
DLL old termios: 5
DLL malloc env: 28
Cygwin conv: 181
API major: 0
API minor: 292
Shared data: 5
DLL identifier: cygwin1
Mount registry: 3
Cygwin registry name: Cygwin
Installations name: Installations
Cygdrive default prefix:
Build date:
Shared id: cygwin1S5
3435k 2015/12/21 C:\cygwin\home\cgull\src\mosh-keithw\cygwin1.dll - os=4.0 img=1.0 sys=4.0
"cygwin1.dll" v0.0 ts=2015-12-21 17:18
Cygwin DLL version info:
DLL version: 2.4.0
DLL epoch: 19
DLL old termios: 5
DLL malloc env: 28
Cygwin conv: 181
API major: 0
API minor: 292
Shared data: 5
DLL identifier: cygwin1
Mount registry: 3
Cygwin registry name: Cygwin
Installations name: Installations
Cygdrive default prefix:
Build date:
Shared id: cygwin1S5
53k 2013/11/01 C:\cygwin\bin\cyganthy-0.dll - os=4.0 img=1.0 sys=4.0
"cyganthy-0.dll" v0.0 ts=2013-11-01 08:04
248k 2013/11/01 C:\cygwin\bin\cyganthydic-0.dll - os=4.0 img=1.0 sys=4.0
"cyganthydic-0.dll" v0.0 ts=2013-11-01 08:04
43k 2013/11/01 C:\cygwin\bin\cyganthyinput-0.dll - os=4.0 img=1.0 sys=4.0
"cyganthyinput-0.dll" v0.0 ts=2013-11-01 08:04
170k 2015/05/25 C:\cygwin\bin\cygapr-1-0.dll - os=4.0 img=1.0 sys=4.0
"cygapr-1-0.dll" v0.0 ts=2015-05-25 03:12
135k 2015/05/25 C:\cygwin\bin\cygaprutil-1-0.dll - os=4.0 img=1.0 sys=4.0
"cygaprutil-1-0.dll" v0.0 ts=2015-05-25 03:35
644k 2015/06/01 C:\cygwin\bin\cygarchive-13.dll - os=4.0 img=1.0 sys=4.0
"cygarchive-13.dll" v0.0 ts=2015-06-01 22:07
221k 2010/04/13 C:\cygwin\bin\cygarchive-2.dll - os=4.0 img=1.0 sys=4.0
"cygarchive-2.dll" v0.0 ts=2010-04-13 02:47
38k 2013/07/23 C:\cygwin\bin\cygargp-0.dll - os=4.0 img=1.0 sys=4.0
"cygargp-0.dll" v0.0 ts=2013-07-23 15:35
547k 2014/03/23 C:\cygwin\bin\cygasn1-8.dll - os=4.0 img=1.0 sys=4.0
"cygasn1-8.dll" v0.0 ts=2014-03-23 23:03
629k 2015/01/23 C:\cygwin\bin\cygaspell-15.dll - os=4.0 img=1.0 sys=4.0
"cygaspell-15.dll" v0.0 ts=2015-01-23 17:37
125k 2015/11/06 C:\cygwin\bin\cygatk-1.0-0.dll - os=4.0 img=1.0 sys=4.0
"cygatk-1.0-0.dll" v0.0 ts=2015-11-06 02:18
169k 2015/11/06 C:\cygwin\bin\cygatk-bridge-2.0-0.dll - os=4.0 img=1.0 sys=4.0
"cygatk-bridge-2.0-0.dll" v0.0 ts=2015-11-06 06:10
87k 2015/07/02 C:\cygwin\bin\cygatomic-1.dll - os=4.0 img=1.0 sys=4.0
"cygatomic-1.dll" v0.0 ts=2015-07-02 21:51
155k 2015/11/12 C:\cygwin\bin\cygatspi-0.dll - os=4.0 img=1.0 sys=4.0
"cygatspi-0.dll" v0.0 ts=2015-11-12 23:39
14k 2012/05/04 C:\cygwin\bin\cygattr-1.dll - os=4.0 img=1.0 sys=4.0
"cygattr-1.dll" v0.0 ts=2012-05-04 12:35
188k 2015/02/11 C:\cygwin\bin\cygautotrace-3.dll - os=4.0 img=1.0 sys=4.0
"cygautotrace-3.dll" v0.0 ts=2015-02-11 14:47
56k 2013/01/23 C:\cygwin\bin\cygavahi-client-3.dll - os=4.0 img=1.0 sys=4.0
"cygavahi-client-3.dll" v0.0 ts=2013-01-23 02:52
38k 2013/01/23 C:\cygwin\bin\cygavahi-common-3.dll - os=4.0 img=1.0 sys=4.0
"cygavahi-common-3.dll" v0.0 ts=2013-01-23 02:52
11k 2013/01/23 C:\cygwin\bin\cygavahi-glib-1.dll - os=4.0 img=1.0 sys=4.0
"cygavahi-glib-1.dll" v0.0 ts=2013-01-23 02:52
203k 2015/03/23 C:\cygwin\bin\cygblkid-1.dll - os=4.0 img=1.0 sys=4.0
"cygblkid-1.dll" v0.0 ts=2015-03-23 09:55
62k 2011/05/21 C:\cygwin\bin\cygbz2-1.dll - os=4.0 img=1.0 sys=4.0
"cygbz2-1.dll" v0.0 ts=2011-05-21 20:16
1219k 2015/11/23 C:\cygwin\bin\cygcairo-2.dll - os=4.0 img=1.0 sys=4.0
"cygcairo-2.dll" v0.0 ts=2015-11-23 20:44
25k 2015/11/23 C:\cygwin\bin\cygcairo-gobject-2.dll - os=4.0 img=1.0 sys=4.0
"cygcairo-gobject-2.dll" v0.0 ts=2015-11-23 20:45
121k 2015/11/23 C:\cygwin\bin\cygcairo-script-interpreter-2.dll - os=4.0 img=1.0 sys=4.0
"cygcairo-script-interpreter-2.dll" v0.0 ts=2015-11-23 20:46
10k 2015/02/20 C:\cygwin\bin\cygcharset-1.dll - os=4.0 img=1.0 sys=4.0
"cygcharset-1.dll" v0.0 ts=2015-02-20 16:52
115k 2013/04/11 C:\cygwin\bin\cygcloog-0.dll - os=4.0 img=1.0 sys=4.0
"cygcloog-0.dll" v0.0 ts=2013-04-11 19:44
125k 2013/05/09 C:\cygwin\bin\cygcloog-isl-4.dll - os=4.0 img=1.0 sys=4.0
"cygcloog-isl-4.dll" v0.0 ts=2013-05-09 08:37
13k 2015/03/19 C:\cygwin\bin\cygcom_err-2.dll - os=4.0 img=1.0 sys=4.0
"cygcom_err-2.dll" v0.0 ts=2015-03-19 02:45
223k 2015/11/06 C:\cygwin\bin\cygcroco-0.6-3.dll - os=4.0 img=1.0 sys=4.0
"cygcroco-0.6-3.dll" v0.0 ts=2015-11-06 05:54
7k 2012/05/07 C:\cygwin\bin\cygcrypt-0.dll - os=4.0 img=1.0 sys=4.0
"cygcrypt-0.dll" v0.0 ts=2012-05-07 12:18
1518k 2015/03/19 C:\cygwin\bin\cygcrypto-0.9.8.dll - os=4.0 img=1.0 sys=4.0
"cygcrypto-0.9.8.dll" v0.0 ts=2015-03-19 17:54
1981k 2015/12/03 C:\cygwin\bin\cygcrypto-1.0.0.dll - os=4.0 img=1.0 sys=4.0
"cygcrypto-1.0.0.dll" v0.0 ts=2015-12-03 20:47
461k 2015/10/07 C:\cygwin\bin\cygcurl-4.dll - os=4.0 img=1.0 sys=4.0
"cygcurl-4.dll" v0.0 ts=2015-10-07 22:53
27k 2014/11/12 C:\cygwin\bin\cygdatrie-1.dll - os=4.0 img=1.0 sys=4.0
"cygdatrie-1.dll" v0.0 ts=2014-11-12 05:14
929k 2011/11/10 C:\cygwin\bin\cygdb-4.5.dll - os=4.0 img=1.0 sys=4.0
"cygdb-4.5.dll" v0.0 ts=2011-11-10 19:52
1284k 2011/11/10 C:\cygwin\bin\cygdb-4.8.dll - os=4.0 img=1.0 sys=4.0
"cygdb-4.8.dll" v0.0 ts=2011-11-10 18:45
273k 2015/02/17 C:\cygwin\bin\cygdbus-1-3.dll - os=4.0 img=1.0 sys=4.0
"cygdbus-1-3.dll" v0.0 ts=2015-02-17 19:43
93k 2011/11/10 C:\cygwin\bin\cygdb_cxx-4.5.dll - os=4.0 img=1.0 sys=4.0
"cygdb_cxx-4.5.dll" v0.0 ts=2011-11-10 19:53
105k 2011/11/10 C:\cygwin\bin\cygdb_cxx-4.8.dll - os=4.0 img=1.0 sys=4.0
"cygdb_cxx-4.8.dll" v0.0 ts=2011-11-10 18:46
159k 2013/10/20 C:\cygwin\bin\cygedit-0.dll - os=4.0 img=1.0 sys=4.0
"cygedit-0.dll" v0.0 ts=2013-10-20 22:09
99k 2015/11/26 C:\cygwin\bin\cygEGL-1.dll - os=4.0 img=1.0 sys=4.0
"cygEGL-1.dll" v0.0 ts=2015-11-26 19:26
201k 2013/09/03 C:\cygwin\bin\cygEMF-1.dll - os=4.0 img=1.0 sys=4.0
"cygEMF-1.dll" v0.0 ts=2013-09-03 11:06
718k 2015/05/17 C:\cygwin\bin\cygepoxy-0.dll - os=4.0 img=1.0 sys=4.0
"cygepoxy-0.dll" v0.0 ts=2015-05-17 17:50
210k 2012/11/27 C:\cygwin\bin\cygevent-2-0-5.dll - os=4.0 img=1.0 sys=4.0
"cygevent-2-0-5.dll" v0.0 ts=2012-11-27 19:45
124k 2012/11/27 C:\cygwin\bin\cygevent_core-2-0-5.dll - os=4.0 img=1.0 sys=4.0
"cygevent_core-2-0-5.dll" v0.0 ts=2012-11-27 19:45
97k 2012/11/27 C:\cygwin\bin\cygevent_extra-2-0-5.dll - os=4.0 img=1.0 sys=4.0
"cygevent_extra-2-0-5.dll" v0.0 ts=2012-11-27 19:46
18k 2012/11/27 C:\cygwin\bin\cygevent_openssl-2-0-5.dll - os=4.0 img=1.0 sys=4.0
"cygevent_openssl-2-0-5.dll" v0.0 ts=2012-11-27 19:46
8k 2012/11/27 C:\cygwin\bin\cygevent_pthreads-2-0-5.dll - os=4.0 img=1.0 sys=4.0
"cygevent_pthreads-2-0-5.dll" v0.0 ts=2012-11-27 19:46
153k 2013/07/31 C:\cygwin\bin\cygexpat-1.dll - os=4.0 img=1.0 sys=4.0
"cygexpat-1.dll" v0.0 ts=2013-07-31 22:33
81k 2015/03/18 C:\cygwin\bin\cygexslt-0.dll - os=4.0 img=1.0 sys=4.0
"cygexslt-0.dll" v0.0 ts=2015-03-19 00:47
32k 2014/10/14 C:\cygwin\bin\cygfam-0.dll - os=4.0 img=1.0 sys=4.0
"cygfam-0.dll" v0.0 ts=2014-10-14 21:21
21k 2011/10/26 C:\cygwin\bin\cygffi-4.dll - os=4.0 img=1.0 sys=4.0
"cygffi-4.dll" v0.0 ts=2011-10-23 14:33
27k 2015/01/02 C:\cygwin\bin\cygffi-6.dll - os=4.0 img=1.0 sys=4.0
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0k 2013/08/19 C:\cygwin\bin\cygicudata.dll (symlink to cygicudata48.dll)
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1191k 2015/09/20 C:\cygwin\bin\cygisl-13.dll - os=4.0 img=1.0 sys=4.0
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184k 2015/06/04 C:\cygwin\bin\cyglua-5.2.dll - os=4.0 img=1.0 sys=4.0
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127k 2014/11/17 C:\cygwin\bin\cyglzo2-2.dll - os=4.0 img=1.0 sys=4.0
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164k 2015/02/13 C:\cygwin\bin\cygm17n-0.dll - os=4.0 img=1.0 sys=4.0
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42k 2015/02/13 C:\cygwin\bin\cygm17n-flt-0.dll - os=4.0 img=1.0 sys=4.0
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123k 2015/08/12 C:\cygwin\bin\cygmagic-1.dll - os=4.0 img=1.0 sys=4.0
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2267k 2012/04/28 C:\cygwin\bin\cygMagick++-5.dll - os=4.0 img=1.0 sys=4.0
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371k 2015/02/11 C:\cygwin\bin\cygMagick++-6.Q16-5.dll - os=4.0 img=1.0 sys=4.0
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"cygwrap-0.dll" v0.0 ts=2013-11-15 20:13
1173k 2015/03/26 C:\cygwin\bin\cygX11-6.dll - os=4.0 img=1.0 sys=4.0
"cygX11-6.dll" v0.0 ts=2015-03-26 15:27
8k 2015/03/26 C:\cygwin\bin\cygX11-xcb-1.dll - os=4.0 img=1.0 sys=4.0
"cygX11-xcb-1.dll" v0.0 ts=2015-03-26 15:27
10k 2013/06/06 C:\cygwin\bin\cygXau-6.dll - os=4.0 img=1.0 sys=4.0
"cygXau-6.dll" v0.0 ts=2013-06-06 06:29
378k 2014/01/15 C:\cygwin\bin\cygXaw-7.dll - os=4.0 img=1.0 sys=4.0
"cygXaw-7.dll" v0.0 ts=2014-01-15 03:07
105k 2015/09/07 C:\cygwin\bin\cygxcb-1.dll - os=4.0 img=1.0 sys=4.0
"cygxcb-1.dll" v0.0 ts=2015-09-07 07:07
12k 2015/09/07 C:\cygwin\bin\cygxcb-composite-0.dll - os=4.0 img=1.0 sys=4.0
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42k 2014/08/10 C:\cygwin\bin\cygxcb-ewmh-2.dll - os=4.0 img=1.0 sys=4.0
"cygxcb-ewmh-2.dll" v0.0 ts=1970-01-01 00:00
73k 2015/09/07 C:\cygwin\bin\cygxcb-glx-0.dll - os=4.0 img=1.0 sys=4.0
"cygxcb-glx-0.dll" v0.0 ts=2015-09-07 07:07
19k 2014/08/10 C:\cygwin\bin\cygxcb-icccm-4.dll - os=4.0 img=1.0 sys=4.0
"cygxcb-icccm-4.dll" v0.0 ts=1970-01-01 00:00
14k 2012/09/28 C:\cygwin\bin\cygxcb-image-0.dll - os=4.0 img=1.0 sys=4.0
"cygxcb-image-0.dll" v0.0 ts=2012-09-28 17:59
32k 2015/09/07 C:\cygwin\bin\cygxcb-render-0.dll - os=4.0 img=1.0 sys=4.0
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14k 2014/08/10 C:\cygwin\bin\cygxcb-render-util-0.dll - os=4.0 img=1.0 sys=4.0
"cygxcb-render-util-0.dll" v0.0 ts=1970-01-01 00:00
12k 2015/09/07 C:\cygwin\bin\cygxcb-shm-0.dll - os=4.0 img=1.0 sys=4.0
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14k 2012/09/28 C:\cygwin\bin\cygxcb-util-1.dll - os=4.0 img=1.0 sys=4.0
"cygxcb-util-1.dll" v0.0 ts=2012-09-28 17:51
10k 2010/11/01 C:\cygwin\bin\cygXcomposite-1.dll - os=4.0 img=1.0 sys=4.0
"cygXcomposite-1.dll" v0.0 ts=2010-11-01 01:59
35k 2013/06/06 C:\cygwin\bin\cygXcursor-1.dll - os=4.0 img=1.0 sys=4.0
"cygXcursor-1.dll" v0.0 ts=2013-06-06 21:33
9k 2013/04/08 C:\cygwin\bin\cygXdamage-1.dll - os=4.0 img=1.0 sys=4.0
"cygXdamage-1.dll" v0.0 ts=2013-04-08 22:37
22k 2015/03/26 C:\cygwin\bin\cygXdmcp-6.dll - os=4.0 img=1.0 sys=4.0
"cygXdmcp-6.dll" v0.0 ts=2015-03-26 15:38
62k 2014/08/10 C:\cygwin\bin\cygXext-6.dll - os=4.0 img=1.0 sys=4.0
"cygXext-6.dll" v0.0 ts=1970-01-01 00:00
19k 2013/06/06 C:\cygwin\bin\cygXfixes-3.dll - os=4.0 img=1.0 sys=4.0
"cygXfixes-3.dll" v0.0 ts=2013-06-06 20:37
216k 2015/03/17 C:\cygwin\bin\cygXfont-1.dll - os=4.0 img=1.0 sys=4.0
"cygXfont-1.dll" v0.0 ts=2015-03-17 16:50
77k 2014/08/10 C:\cygwin\bin\cygXft-2.dll - os=4.0 img=1.0 sys=4.0
"cygXft-2.dll" v0.0 ts=1970-01-01 00:00
58k 2014/08/10 C:\cygwin\bin\cygXi-6.dll - os=4.0 img=1.0 sys=4.0
"cygXi-6.dll" v0.0 ts=1970-01-01 00:00
9k 2013/06/06 C:\cygwin\bin\cygXinerama-1.dll - os=4.0 img=1.0 sys=4.0
"cygXinerama-1.dll" v0.0 ts=2013-06-06 21:38
119k 2012/05/23 C:\cygwin\bin\cygxkbfile-1.dll - os=4.0 img=1.0 sys=4.0
"cygxkbfile-1.dll" v0.0 ts=2012-05-23 05:41
1271k 2015/11/27 C:\cygwin\bin\cygxml2-2.dll - os=4.0 img=1.0 sys=4.0
"cygxml2-2.dll" v0.0 ts=2015-11-27 20:45
88k 2014/01/15 C:\cygwin\bin\cygXmu-6.dll - os=4.0 img=1.0 sys=4.0
"cygXmu-6.dll" v0.0 ts=2014-01-15 02:52
12k 2014/01/15 C:\cygwin\bin\cygXmuu-1.dll - os=4.0 img=1.0 sys=4.0
"cygXmuu-1.dll" v0.0 ts=2014-01-15 02:52
60k 2014/01/15 C:\cygwin\bin\cygXpm-4.dll - os=4.0 img=1.0 sys=4.0
"cygXpm-4.dll" v0.0 ts=2014-01-15 02:25
35k 2014/01/15 C:\cygwin\bin\cygXrandr-2.dll - os=4.0 img=1.0 sys=4.0
"cygXrandr-2.dll" v0.0 ts=2014-01-15 00:57
35k 2013/06/14 C:\cygwin\bin\cygXrender-1.dll - os=4.0 img=1.0 sys=4.0
"cygXrender-1.dll" v0.0 ts=2013-06-14 10:01
227k 2015/03/18 C:\cygwin\bin\cygxslt-1.dll - os=4.0 img=1.0 sys=4.0
"cygxslt-1.dll" v0.0 ts=2015-03-19 00:47
9k 2012/05/23 C:\cygwin\bin\cygXss-1.dll - os=4.0 img=1.0 sys=4.0
"cygXss-1.dll" v0.0 ts=2012-05-23 05:56
320k 2014/08/10 C:\cygwin\bin\cygXt-6.dll - os=4.0 img=1.0 sys=4.0
"cygXt-6.dll" v0.0 ts=1970-01-01 00:00
19k 2013/06/06 C:\cygwin\bin\cygXtst-6.dll - os=4.0 img=1.0 sys=4.0
"cygXtst-6.dll" v0.0 ts=2013-06-06 20:43
114k 2014/12/08 C:\cygwin\bin\cygyaml-0-2.dll - os=4.0 img=1.0 sys=4.0
"cygyaml-0-2.dll" v0.0 ts=2014-12-08 18:29
83k 2014/11/19 C:\cygwin\bin\cygz.dll - os=4.0 img=1.0 sys=4.0
"cygz.dll" v0.0 ts=2014-11-19 22:57
74k 2015/03/26 C:\cygwin\bin\cygzip-2.dll - os=4.0 img=1.0 sys=4.0
"cygzip-2.dll" v0.0 ts=2015-03-26 20:05
3435k 2015/12/21 C:\cygwin\bin\cygwin1.dll - os=4.0 img=1.0 sys=4.0
"cygwin1.dll" v0.0 ts=2015-12-21 17:18
Cygwin DLL version info:
DLL version: 2.4.0
DLL epoch: 19
DLL old termios: 5
DLL malloc env: 28
Cygwin conv: 181
API major: 0
API minor: 292
Shared data: 5
DLL identifier: cygwin1
Mount registry: 3
Cygwin registry name: Cygwin
Installations name: Installations
Cygdrive default prefix:
Build date:
Shared id: cygwin1S5
3435k 2015/12/21 .\cygwin1.dll - os=4.0 img=1.0 sys=4.0
"cygwin1.dll" v0.0 ts=2015-12-21 17:18
Cygwin DLL version info:
DLL version: 2.4.0
DLL epoch: 19
DLL old termios: 5
DLL malloc env: 28
Cygwin conv: 181
API major: 0
API minor: 292
Shared data: 5
DLL identifier: cygwin1
Mount registry: 3
Cygwin registry name: Cygwin
Installations name: Installations
Cygdrive default prefix:
Build date:
Shared id: cygwin1S5
Warning: There are multiple cygwin1.dlls on your path
Service : sshd
Display name : CYGWIN sshd
Current State : Running
Controls Accepted : Stop
Command : /usr/sbin/sshd -D
stdin path : /dev/null
stdout path : /var/log/sshd.log
stderr path : /var/log/sshd.log
Process Type : Own Process
Startup : Automatic
Dependencies : tcpip
Account : .\cyg_server
Cygwin Package Information
Last downloaded files to: C:\Program Files (x86)\Mozilla Firefox
Last downloaded files from: http://mirror.cs.vt.edu/pub/cygwin/cygwin/
Package Version Status
_autorebase 001002-1 OK
_update-info-dir 01468-1 OK
adwaita-icon-theme 3.18.0-1 OK
adwaita-themes 3.18.0-1 OK
alternatives 1.3.30c-10 OK
Empty package apache2
apache2 2.4.16-1 OK
at-spi2-core 2.18.3-1 OK
autoconf 13-1 OK
autoconf2.1 2.13-12 OK
autoconf2.5 2.69-3 OK
automake 9-1 OK
automake1.10 1.10.3-2 OK
automake1.11 1.11.6-2 OK
automake1.12 1.12.6-2 OK
automake1.13 1.13.4-1 OK
automake1.14 1.14.1-2 OK
automake1.15 1.15-1 OK
automake1.4 1.4p6-11 OK
automake1.5 1.5-11 OK
automake1.6 1.6.3-12 OK
automake1.7 1.7.9-11 OK
automake1.8 1.8.5-11 OK
automake1.9 1.9.6-11 OK
base-cygwin 3.8-1 OK
base-files 4.2-4 OK
bash 4.3.42-4 OK
binutils 2.25-4 OK
bzip2 1.0.6-2 OK
ca-certificates 2.6-1 OK
cabextract 1.6-1 OK
cmake 3.3.2-1 OK
coreutils 8.24-3 OK
cpio 2.11-3 OK
crypt 1.2-1 OK
csih 0.9.9-1 OK
cvs 1.12.13-10 OK
cvsps 2.2b1-1 OK
cygrunsrv 1.62-1 OK
cygutils 1.4.15-2 OK
cygwin 2.4.0-0.16 OK
cygwin-debuginfo 2.3.1-1 OK
cygwin-devel 2.3.1-1 OK
cygwin-doc 2.3.0-1 OK
cygwin-x-doc 1.1.20150922-1 OK
dash 0.5.8-3 OK
dbus 1.8.16-1 OK
dbus-x11 1.8.16-1 OK
dconf-service 0.24.0-1 OK
desktop-file-utils 0.22-1 OK
diffutils 3.3-3 OK
dos2unix 7.3.2-1 OK
dri-drivers 11.0.6-1 OK
editrights 1.03-1 OK
emacs 24.5-2 OK
emacs-el 24.5-2 OK
emacs-X11 24.5-2 OK
fbpanel 6.1-6 OK
file 5.24-1 OK
findutils 4.5.12-1 OK
Empty package font-adobe-dpi75
font-adobe-dpi75 7.5-2 OK
Empty package font-alias
font-alias 7.5-2 OK
font-bitstream-vera-ttf 1.10-1 OK
Empty package font-encodings
font-encodings 7.5-2 OK
Empty package font-misc-misc
font-misc-misc 7.5-2 OK
fontconfig 2.11.1-3 OK
gamin 0.1.10-15 OK
gawk 4.1.3-1 OK
Empty package gcc
gcc 4.7.3-1 OK
gcc-core 4.9.3-1 OK
gcc-g++ 4.9.3-1 OK
gcc-mingw-core 20050522-3 OK
Empty package gcc-mingw-g++
gcc-mingw-g++ 4.5.2-1 OK
gccmakedep 1.0.3-1 OK
gcr 3.18.0-1 OK
gdb 7.8-2 OK
gdk-pixbuf2.0-svg 2.40.11-1 OK
getent 2.18.90-4 OK
gettext 0.19.5.1-2 OK
git 2.6.2-1 OK
gitk 2.6.2-1 OK
glib2.0-networking 2.46.1-1 OK
gnome-icon-theme 3.10.0-1 OK
gnome-keyring 3.18.3-1 OK
gnome-menus 3.13.3-3 OK
grep 2.21-2 OK
groff 1.22.3-1 OK
gsettings-desktop-schemas 3.18.1-1 OK
gtk-update-icon-cache 3.18.5-1 OK
gtk2.0-engines-pixmap 2.24.28-2 OK
gvfs 1.26.2-1 OK
gzip 1.6-1 OK
hicolor-icon-theme 0.12-1 OK
hostname 3.13-1 OK
httpd 2.4.16-1 OK
inetutils 1.9.1-2 OK
inetutils-server 1.9.1-2 OK
info 6.0-1 OK
ipc-utils 1.0-1 OK
iperf 2.0.5-1 OK
keychain 2.7.1-1 OK
less 481-1 OK
libanthy-common 9100h-2 OK
libanthy0 9100h-2 OK
libapr1 1.5.2-2 OK
libaprutil1 1.5.4-2 OK
libarchive13 3.1.2-3 OK
libarchive2 2.8.3-1 OK
libargp 20110921-2 OK
libasn1_8 1.5.3-1 OK
libaspell15 0.60.6.1-3 OK
libatk-bridge2.0_0 2.18.1-1 OK
libatk1.0_0 2.18.0-1 OK
libatomic1 4.9.3-1 OK
libatspi0 2.18.3-1 OK
libattr1 2.4.46-1 OK
libautotrace3 0.31.1-16 OK
libavahi-client3 0.6.31-2 OK
libavahi-common3 0.6.31-2 OK
libavahi-glib1 0.6.31-2 OK
libblkid1 2.25.2-2 OK
libbz2_1 1.0.6-2 OK
libcairo2 1.14.4-1 OK
libcharset1 1.14-3 OK
libcloog-isl4 0.18.0-2 OK
libcloog0 0.15.11-1 OK
libcom_err2 1.42.12-2 OK
libcroco0.6_3 0.6.9-1 OK
libcurl4 7.45.0-1 OK
libdatrie1 0.2.8-1 OK
libdb4.5 4.5.20.2-3 OK
libdb4.8 4.8.30-1 OK
libdbus1_3 1.8.16-1 OK
libedit0 20130712-1 OK
libEGL1 11.0.6-1 OK
libEMF1 1.0.7-2 OK
libepoxy0 1.2-1 OK
libevent2.0_5 2.0.21-1 OK
libexpat1 2.1.0-3 OK
libfam0 0.1.10-15 OK
libffi4 4.5.3-3 OK
libffi6 3.2.1-1 OK
libfftw3_3 3.3.4-2 OK
libfontconfig1 2.11.1-3 OK
libfontenc1 1.1.2-1 OK
libfpx1 1.3.1.4-1 OK
libfreetype6 2.5.5-2 OK
libfribidi0 0.19.2-1 OK
libgcc1 4.9.3-1 OK
libgck1_0 3.18.0-1 OK
libgcr-base3_1 3.18.0-1 OK
libgcr-ui3-common 3.18.0-1 OK
libgcr-ui3_1 3.18.0-1 OK
Empty package libgcr3-common
libgcr3-common 3.18.0-1 OK
Empty package libgcr3_1
libgcr3_1 3.18.0-1 OK
libgcrypt11 1.5.3-2 OK
libgcrypt20 1.6.4-1 OK
libgd2 2.0.36RC1-13 OK
libgd3 2.1.1-1 OK
libgdbm4 1.8.3-20 OK
libgdk_pixbuf2.0_0 2.32.2-1 OK
libgif4 4.1.6-10 OK
libGL1 11.0.6-1 OK
libglapi0 11.0.6-1 OK
libglib2.0_0 2.46.2-1 OK
libglitz1 0.5.6-10 OK
libgmp10 6.1.0-2p1 OK
libgmp3 4.3.2-1 OK
libgmpxx4 6.1.0-2p1 OK
libgnome-menu3_0 3.13.3-3 OK
libgnutls28 3.3.17-1 OK
libgomp1 4.9.3-1 OK
libgpg-error0 1.19-1 OK
libgraphite2_3 1.2.3-1 OK
libgs9 9.15-2 OK
libgsf1_114 1.14.34-1 OK
libgssapi3 1.5.3-1 OK
libgssapi_krb5_2 1.13.2-3 OK
libgtk2.0_0 2.24.28-2 OK
libgtk3_0 3.18.5-1 OK
libguile17 1.8.8-1 OK
libharfbuzz0 1.0.6-1 OK
libheimbase1 1.5.3-1 OK
libheimntlm0 1.5.3-1 OK
libhogweed2 2.7-2 OK
libhx509_5 1.5.3-1 OK
libICE6 1.0.9-1 OK
libiconv 1.14-3 OK
libiconv-devel 1.14-3 OK
libiconv2 1.14-3 OK
libicu48 4.8.1-1 OK
libidn11 1.29-1 OK
libintl-devel 0.19.5.1-2 OK
libintl3 0.14.5-1 OK
libintl8 0.19.5.1-2 OK
libiodbc2 3.52.8-2 OK
libisl10 0.11.1-2 OK
libisl13 0.14.1-1 OK
libjasper1 1.900.1-15 OK
libjbig2 2.0-14 OK
libjpeg7 7-10 OK
libjpeg8 8b-1 OK
libjson-glib1.0_0 1.0.4-1 OK
libk5crypto3 1.13.2-3 OK
libkafs0 1.5.3-1 OK
libkrb5_26 1.5.3-1 OK
libkrb5_3 1.13.2-3 OK
libkrb5support0 1.13.2-3 OK
liblcms2_2 2.6-1 OK
libllvm3.1 3.1-3 OK
libllvm3.4 3.4.2-5 OK
libllvm3.5 3.5.2-1 OK
libltdl7 2.4.6-2 OK
liblzma1 4.999.9beta-11 OK
liblzma5 5.2.2-1 OK
liblzo2_2 2.08-1 OK
libm17n0 1.7.0-1 OK
libMagickC++6_5 6.9.0.0-4 OK
libMagickCore5 6.7.6.3-3 OK
Empty package libMagickCore6
libMagickCore6 6.9.1.3-3 OK
libMagickCore6_2 6.9.1.3-3 OK
libMagickWand6_2 6.9.1.3-3 OK
libmcpp0 2.7.2-2 OK
libming1 0.4.7-1 OK
libmpc3 1.0.3-1 OK
libmpfr4 3.1.3-1 OK
libmspack0 0.5-0.1.alpha OK
libmysqlclient18 5.5.45-1 OK
libncurses-devel 6.0-1.20151017 OK
libncurses10 5.9-20150530-1 OK
libncurses8 5.5-10 OK
libncurses9 5.7-16 OK
Empty package libncursesw-devel
libncursesw-devel 6.0-1.20151017 OK
libncursesw10 6.0-1.20151017 OK
libneon27 0.30.1-1 OK
libnettle4 2.7-2 OK
libopenldap2_3_0 2.3.43-3 OK
libopenldap2_4_2 2.4.42-1 OK
libopenssl098 0.9.8zf-1 OK
libopenssl100 1.0.2e-1 OK
libOpenVG1 10.3.7-1 OK
libotf0 0.9.13-1 OK
libp11-kit0 0.22.1-1 OK
libpango1.0_0 1.38.1-1 OK
libpaper-common 1.1.24-2 OK
libpaper1 1.1.24-2 OK
libpcre0 8.21-2 OK
libpcre1 8.37-2 OK
libpipeline1 1.4.0-1 OK
libpixman1_0 0.32.8-1 OK
libplotter2 2.6-4 OK
libpng12 1.2.55-1 OK
libpng14 1.4.12-3 OK
libpng15 1.5.22-1 OK
libpng16 1.6.20-1 OK
Empty package libpopt0
libpopt0 1.16-1 OK
libppl9 0.11.2-1 OK
libppl_c4 0.11.2-1 OK
libpq5 9.4.5-1 OK
libprotobuf-devel 2.5.0-1 OK
libprotobuf8 2.5.0-1 OK
libproxy0 0.2.3-2 OK
libproxy1 0.4.11-5 OK
libpstoedit0 3.70-1 OK
libpwl5 0.11.2-1 OK
libquadmath0 4.9.3-1 OK
libreadline7 6.3.8-1 OK
librest0.7_0 0.7.93-1 OK
libroken18 1.5.3-1 OK
librsvg2_2 2.40.11-1 OK
Missing file: /etc/sasl2/.keep-cyrus-sasl from package libsasl2
libsasl2 2.1.23-1 Incomplete
libsasl2_3 2.1.26-9 OK
libsecret1_0 0.18.3-1 OK
Missing file: /usr/share/doc/Cygwin/serf.README from package libserf0_1
libserf0_1 0.7.1-1 Incomplete
libserf1_0 1.3.8-1 OK
libsigsegv2 2.10-2 OK
libSM6 1.2.2-1 OK
libsmartcols1 2.25.2-2 OK
libsoup-gnome2.4_1 2.52.2-1 OK
libsoup2.4_1 2.52.2-1 OK
libsqlite3_0 3.9.2-1 OK
libssh2_1 1.5.0-1 OK
libssp0 4.9.3-1 OK
libstdc++6 4.9.3-1 OK
libtasn1_6 4.5-1 OK
libthai0 0.1.21-1 OK
libtiff5 3.9.7-4 OK
libtiff6 4.0.6-1 OK
libuuid-devel 2.25.2-2 OK
libuuid1 2.25.2-2 OK
libvpx1 1.3.0-2 OK
libvte9 0.28.2-6 OK
libvtv0 5.2.0-1 OK
libwebp5 0.4.3-1 OK
libwind0 1.5.3-1 OK
libwrap0 7.6-22 OK
libX11-xcb1 1.6.3-1 OK
libX11_6 1.6.3-1 OK
libXau6 1.0.8-1 OK
libXaw7 1.0.12-1 OK
libxcb-composite0 1.11.1-1 OK
libxcb-ewmh2 0.4.1-1 OK
libxcb-glx0 1.11.1-1 OK
libxcb-icccm4 0.4.1-1 OK
libxcb-image0 0.3.9-1 OK
libxcb-render-util0 0.3.9-1 OK
libxcb-render0 1.11.1-1 OK
libxcb-shm0 1.11.1-1 OK
libxcb-util1 0.3.9-1 OK
libxcb1 1.11.1-1 OK
libXcomposite1 0.4.3-1 OK
libXcursor1 1.1.14-1 OK
libXdamage1 1.1.4-1 OK
libXdmcp6 1.1.2-1 OK
libXext6 1.3.3-1 OK
libXfixes3 5.0.1-1 OK
libXfont1 1.5.1-1 OK
libXft2 2.3.2-1 OK
libXi6 1.7.4-1 OK
libXinerama1 1.1.3-1 OK
libxkbfile1 1.0.8-1 OK
libxml2 2.9.3-1 OK
libXmu6 1.1.2-1 OK
libXmuu1 1.1.2-1 OK
libXpm4 3.5.11-1 OK
libXrandr2 1.4.2-1 OK
libXrender1 0.9.8-1 OK
libxslt 1.1.28-2 OK
libXss1 1.2.2-1 OK
libXt6 1.1.4-2 OK
libXtst6 1.2.2-1 OK
libyaml0_2 0.1.6-2 OK
libzip2 0.11.2-2 OK
login 1.11-1 OK
lua 5.2.4-1 OK
luit 20130217-1 OK
lxterminal 0.2.0-1 OK
lynx 2.8.7-1 OK
lzop 1.03-1 OK
m17n-db 1.7.0-1 OK
m4 1.4.17-2 OK
make 4.1-1 OK
makedepend 1.0.5-1 OK
Empty package man
man 2.7.4-1 OK
man-db 2.7.4-1 OK
mcpp 2.7.2-2 OK
mingw-binutils 2.23.1-1 OK
mingw-gcc-core 4.7.3-1 OK
mingw-gcc-g++ 4.7.3-1 OK
mingw-pthreads 20110507-2 OK
mingw-runtime 4.0-1 OK
mingw-w32api 4.0-1 OK
minires 1.02-1 OK
mintty 2.2.2-0 OK
mkfontdir 1.0.7-1 OK
mkfontscale 1.1.1-1 OK
mosh 1.2.5-1 OK
mosh-debuginfo 1.2.5-1 OK
ncurses 6.0-1.20151017 OK
ncurses-demo 6.0-1.20151017 OK
Empty package ncursesw
ncursesw 6.0-1.20151017 OK
Empty package ncursesw-demo
ncursesw-demo 6.0-1.20151017 OK
openssh 7.1p1-1 OK
openssl 1.0.2e-1 OK
openssl-devel 1.0.2e-1 OK
p11-kit 0.22.1-1 OK
p11-kit-trust 0.22.1-1 OK
p7zip 15.09-1 OK
perl 5.22.1-1 OK
perl-Archive-Zip 1.55-1 OK
perl-B-Generate 1.53-2 OK
perl-Capture-Tiny 0.30-2 OK
perl-Carp 1.3301-2 OK
perl-common-sense 3.74-1 OK
perl-Compress-Bzip2 2.24-1 OK
perl-Config-Perl-V 0.25-1 OK
perl-Config-Tiny 2.23-1 OK
perl-CPAN-DistnameInfo 0.12-5 OK
perl-CPAN-Reporter 1.2015-1 OK
perl-CPAN-Testers-Report 1.999003-2 OK
perl-Data-Alias 1.20-1 OK
perl-Data-GUID 0.048-2 OK
perl-Data-OptList 0.109-2 OK
perl-Data-UUID 1.221-1 OK
perl-Devel-Autoflush 0.06-2 OK
perl-Devel-Symdump 2.15-1 OK
perl-Digest-HMAC 1.03-5 OK
perl-Digest-SHA 5.95-2 OK
perl-Encode-Locale 1.05-1 OK
perl-Error 0.17024-1 OK
perl-File-Copy-Recursive 0.38-5 OK
perl-File-HomeDir 1.00-3 OK
perl-File-Listing 6.04-5 OK
perl-File-pushd 1.009-2 OK
perl-File-Which 1.19-1 OK
perl-HTML-Parser 3.71-3 OK
perl-HTML-Tagset 3.20-5 OK
perl-HTTP-Cookies 6.01-5 OK
perl-HTTP-Daemon 6.01-5 OK
perl-HTTP-Date 6.02-5 OK
perl-HTTP-Message 6.11-1 OK
perl-HTTP-Negotiate 6.01-5 OK
perl-IO-CaptureOutput 1.1104-2 OK
perl-IO-HTML 1.001-2 OK
perl-IO-Prompt-Tiny 0.003-2 OK
perl-IO-Socket-INET6 2.72-2 OK
perl-IO-String 1.08-5 OK
perl-IO-Tty 1.12-2 OK
perl-IPC-Cmd 0.92-2 OK
perl-IPC-Run 0.94-2 OK
perl-JSON 2.90-3 OK
perl-JSON-XS 3.01-3 OK
perl-libwww-perl 6.15-1 OK
perl-LWP-MediaTypes 6.02-5 OK
perl-Metabase-Client-Simple 0.010-2 OK
perl-Metabase-Fact 0.024-2 OK
perl-MIME-Base32 1.02-1 OK
perl-Module-ScanDeps 1.20-1 OK
perl-Module-Signature 0.79-1 OK
perl-Net-DNS 1.04-1 OK
perl-Net-HTTP 6.09-1 OK
perl-Net-IP 1.26-3 OK
perl-PadWalker 2.2-1 OK
perl-PAR-Dist 0.49-3 OK
perl-Params-Util 1.07-5 OK
perl-Pod-Coverage 0.23-3 OK
perl-Pod-Escapes 1.07-2 OK
perl-Pod-Simple 3.32-1 OK
perl-Probe-Perl 0.03-3 OK
perl-Proc-ProcessTable 0.53-1 OK
perl-Socket6 0.25-2 OK
perl-Sub-Exporter 0.987-3 OK
perl-Sub-Install 0.928-2 OK
perl-Tee 0.14-5 OK
perl-Term-ReadLine-Gnu 1.28-1 OK
perl-Term-ReadLine-Perl 1.0303-5 OK
perl-TermReadKey 2.33-1 OK
perl-Test-NoWarnings 1.04-4 OK
perl-Test-Pod 1.51-1 OK
perl-Test-Pod-Coverage 1.10-2 OK
perl-Test-Reporter 1.62-2 OK
perl-Test-Reporter-Transport-Metabase 1.999009-2 OK
perl-Test-Simple 1.001014-2 OK
perl-Types-Serialiser 1.0-3 OK
perl-URI 1.69-1 OK
perl-WWW-RobotRules 6.02-5 OK
perl-XML-LibXML 2.0123-1 OK
perl-XML-NamespaceSupport 1.11-5 OK
perl-XML-Parser 2.44-2 OK
perl-XML-SAX 0.99-5 OK
perl-XML-SAX-Base 1.08-5 OK
perl-YAML 1.15-2 OK
perl_autorebase 5.22.1-1 OK
perl_base 5.22.1-1 OK
perl_vendor 5.14.4-1 OK
ping 1.0.2-1 OK
pkg-config 0.29-1 OK
popt 1.16-1 OK
procps 3.2.8-4 OK
psmisc 22.16-1 OK
putty 0.66-1 OK
python 2.7.10-1 OK
python-doc 2.7.9-1 OK
rcs 5.9.4-1 OK
rebase 4.4.1-1 OK
rsync 3.1.1-1 OK
ruby 2.2.3-1 OK
ruby-actionpack 4.2.4-1 OK
ruby-actionview 4.2.4-1 OK
ruby-activemodel 4.2.4-1 OK
ruby-activesupport 4.2.4-1 OK
ruby-binding_of_caller 0.7.2-1 OK
ruby-builder 3.2.2-1 OK
ruby-debug_inspector 0.0.2-1 OK
ruby-erubis 2.7.0-2 OK
ruby-i18n 0.7.0-1 OK
ruby-io-console 0.4.2-2 OK
ruby-io-console-doc 0.4.2-2 OK
ruby-json 1.8.2-1 OK
ruby-loofah 2.0.2-1 OK
ruby-minitest4 4.7.5-1 OK
ruby-minitest5 5.6.1-1 OK
ruby-nokogiri 1.6.6.2-1 OK
ruby-rack 1.6.2-1 OK
ruby-rack-test 0.6.3-1 OK
ruby-rails-deprecated_sanitizer 1.0.3-1 OK
ruby-rails-dom-testing 1.0.6-1 OK
ruby-rails-html-sanitizer 1.0.2-1 OK
ruby-railties 4.2.4-1 OK
ruby-rake 10.4.2-1 OK
ruby-rdoc 4.2.0-1 OK
ruby-sprockets 3.1.0-1 OK
ruby-sprockets-rails 2.3.1-1 OK
ruby-thor 0.19.1-1 OK
ruby-thread_safe 0.3.5-1 OK
ruby-tzinfo 1.2.2-1 OK
ruby-web-console 2.1.3-1 OK
ruby-web-console-doc 2.1.3-1 OK
rubygems 2.4.8-1 OK
run 1.3.4-2 OK
sed 4.2.2-3 OK
setxkbmap 1.3.0-1 OK
shared-mime-info 1.5-1 OK
subversion 1.9.3-1 OK
subversion-apache2 1.8.13-1 OK
tar 1.28-1 OK
tcl 8.5.18-1 OK
tcl-tk 8.5.18-1 OK
Empty package tcltk
tcltk 20120206-1 OK
terminfo 6.0-1.20151017 OK
terminfo-extra 6.0-1.20151017 OK
terminfo0 5.5_20061104-12 OK
texinfo 6.0-1 OK
tmux 2.1-1 OK
tzcode 2015g-1 OK
util-linux 2.25.2-2 OK
vim-minimal 7.4.891-1 OK
Empty package w32api
w32api 9999-1 OK
w32api-headers 4.0.4-1 OK
w32api-runtime 4.0.4-1 OK
weechat 1.3-1 OK
weechat-doc 1.3-1 OK
weechat-lua 1.3-1 OK
weechat-perl 1.3-1 OK
weechat-python 1.3-1 OK
weechat-ruby 1.3-1 OK
which 2.20-2 OK
windows-default-manifest 6.4-1 OK
xauth 1.0.9-1 OK
xcursor-themes 1.0.4-1 OK
xdg-user-dirs 0.15-1 OK
xemacs-emacs-common 21.4.24-1 OK
xf86-video-dummy 0.3.7-3 OK
xf86-video-nested 0.1.0-6 OK
xinit 1.3.4-9 OK
xkbcomp 1.2.4-1 OK
xkeyboard-config 2.14-1 OK
xlaunch 20150224-2 OK
xmodmap 1.0.8-1 OK
xorg-server 1.17.4-1 OK
xorg-server-common 1.17.4-1 OK
Missing file: /etc/X11/fontpath.d/xorg-x11-fonts-75dpi:unscaled:pri=20 from package xorg-x11-fonts-dpi75
xorg-x11-fonts-dpi75 7.5-2 Incomplete
Missing file: /etc/X11/fontpath.d/xorg-x11-fonts-misc:unscaled:pri=10 from package xorg-x11-fonts-misc
xorg-x11-fonts-misc 7.5-2 Incomplete
xrdb 1.1.0-1 OK
xterm 320-1 OK
xwin-xdg-menu 20150708-1 OK
xz 5.2.2-1 OK
zip 3.0-12 OK
zlib 1.2.8-3 OK
zlib-devel 1.2.8-3 OK
zlib0 1.2.8-3 OK
Use -h to see help about each section
[-- Attachment #3: Type: text/plain, Size: 218 bytes --]
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^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: cygwin.dll: bug with select on Windows console
2015-12-28 1:50 cygwin.dll: bug with select on Windows console john hood
@ 2016-01-02 2:06 ` John Hood
2016-01-03 0:45 ` Mark Geisert
2016-01-07 0:48 ` Mark Geisert
2016-01-07 17:30 ` Corinna Vinschen
2 siblings, 1 reply; 18+ messages in thread
From: John Hood @ 2016-01-02 2:06 UTC (permalink / raw)
To: cygwin
More observations:
* This also happens on a Windows 8.1 VDI install with a different
AV/security solution-- different enough from my machine that I don't
think the Windows/app environment is the cause of this, it looks more
strongly like a Cygwin issue to me.
*
<http://pubs.opengroup.org/onlinepubs/9699919799/functions/pselect.html>
clearly states that select() must zero out all FD_SET bits when it
returns 0.
* Moving the mouse cursor around over the console window (at a bash
prompt, without mouse modes enabled) makes this issue happen *much* more
frequently.
I'd investigate further but on current Git sources, 'make' fails for me
with this:
/home/cgull/src/newlib-cygwin/newlib/libc/configure: line 2164: syntax
error near unexpected token `..'
/home/cgull/src/newlib-cygwin/newlib/libc/configure: line 2164:
`NEWLIB_CONFIGURE(..)'
regards,
--jh
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^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: cygwin.dll: bug with select on Windows console
2016-01-02 2:06 ` John Hood
@ 2016-01-03 0:45 ` Mark Geisert
0 siblings, 0 replies; 18+ messages in thread
From: Mark Geisert @ 2016-01-03 0:45 UTC (permalink / raw)
To: cygwin
John Hood wrote:
> More observations:
>
> * This also happens on a Windows 8.1 VDI install with a different AV/security
> solution-- different enough from my machine that I don't think the Windows/app
> environment is the cause of this, it looks more strongly like a Cygwin issue to me.
>
> * <http://pubs.opengroup.org/onlinepubs/9699919799/functions/pselect.html>
> clearly states that select() must zero out all FD_SET bits when it returns 0.
>
> * Moving the mouse cursor around over the console window (at a bash prompt,
> without mouse modes enabled) makes this issue happen *much* more frequently.
I've looked at the Cygwin source for select(), and maybe other folks have, so
the issue is not being ignored at least. It seems to me this odd case (not
clearing the fd sets on zero return) is being overlooked by Cygwin's rather
hairy select() implementation. But I'm just a guy on the mailing list and the
definitive answer awaits the return of seasoned Cygwin developer(s). :-)
> I'd investigate further but on current Git sources, 'make' fails for me with this:
>
> /home/cgull/src/newlib-cygwin/newlib/libc/configure: line 2164: syntax error
> near unexpected token `..'
> /home/cgull/src/newlib-cygwin/newlib/libc/configure: line 2164:
> `NEWLIB_CONFIGURE(..)'
Are you following the instructions in the FAQ, Section 6.21? It's not difficult
to build the Cygwin DLL but you do want to follow the FAQ because there are
numerous cul-de-sac opportunities otherwise.
..mark
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^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: cygwin.dll: bug with select on Windows console
2015-12-28 1:50 cygwin.dll: bug with select on Windows console john hood
2016-01-02 2:06 ` John Hood
@ 2016-01-07 0:48 ` Mark Geisert
2016-01-07 17:30 ` Corinna Vinschen
2 siblings, 0 replies; 18+ messages in thread
From: Mark Geisert @ 2016-01-07 0:48 UTC (permalink / raw)
To: cygwin
john hood wrote:
> I've attached a little demo program for the bug. Compile, run as
> "socket-t 1000" (the argument is the number of microseconds select()
> should wait), and mash keys on the keyboard for a little while. It
> should report errors within 100 keystrokes. I think there might be a
> dependency on the length of the wait passed to select(), I don't see the
> problem happening with the wait set to 100 seconds.
It appears your demo program didn't make it to the list. Could you please
re-post it?
..mark
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^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: cygwin.dll: bug with select on Windows console
2015-12-28 1:50 cygwin.dll: bug with select on Windows console john hood
2016-01-02 2:06 ` John Hood
2016-01-07 0:48 ` Mark Geisert
@ 2016-01-07 17:30 ` Corinna Vinschen
2016-01-07 18:18 ` John Hood
2 siblings, 1 reply; 18+ messages in thread
From: Corinna Vinschen @ 2016-01-07 17:30 UTC (permalink / raw)
To: cygwin; +Cc: john hood
[-- Attachment #1: Type: text/plain, Size: 4956 bytes --]
Hi John,
On Dec 27 20:49, john hood wrote:
> Hi all,
>
> I'm one of the Mosh maintainers. Recently a user reported a problem
> where Mosh exits suddenly soon after startup while he is typing at it,
> see <https://github.com/mobile-shell/mosh/issues/705>.
>
> The problem turns out to be that occasionally, select() times out,
> returns 0 as it should, but does *not* clear the fd_sets() passed in--
> they are left unaltered. Mosh doesn't pay any attention to the count of
> ready fds and relies on the returned fd_sets being accurate. Mosh sets
> the read fd_set and the error fd_set, and when it encounters this
> situation, it exits quietly when an error is found on one of the files
> involved (rather poor error handling on our part).
>
> This only seems to happen on Windows Console. select() seems to operate
> reliably when used on a pty, whether from mintty, xterm, or sshd.
>
> My read of the POSIX standard is that select() should always set the
> fd_sets on a successful return (rv >= 0). There is a bit of ambiguity
> around this point, but given that Cygwin is inconsistent with itself (on
> ptys) and with every other Unix platform, I think it's a bug.
>
> I've attached a little demo program for the bug. Compile, run as
> "socket-t 1000" (the argument is the number of microseconds select()
> should wait), and mash keys on the keyboard for a little while. It
> should report errors within 100 keystrokes. I think there might be a
> dependency on the length of the wait passed to select(), I don't see the
> problem happening with the wait set to 100 seconds.
Unfortunately you missed to attach the testcase. I checked Cygwin's
select and I can see what might be the reason for what you're observing.
I might even have a fix. But what bugs me is that I don't see how this
condition could be met at all, especially not in case of selecting on
the console. Your testcase would be greatly appreciated.
For further discussion I attached the patch I'm proposing. AFAICS,
copying the content of r,w,e over to readfds,writefds,exceptfds doesn't
really make sense, unless r,w,e are still unchanged (i.e. zeroed out).
However, *if* r,w,e have set bits, sel.wait should have returned
select_ok, not select_set_zero. I don't see how this might occur.
That's what your testcase hopefully helps to uncover.
Another hiccup with copying r,w,e to readfds,writefds,exceptfds and then
calling sel.poll is this: The number of set bits is *only* determined
by sel.poll. If there are any other bits set in r,w,e, the result of
sel.poll might not reflect this and the return value is not equal to the
number of bits set in the records. Obviously this is not a problem in
your case since you don't check the return value, but other applications
might.
Thanks,
Corinna
diff --git a/winsup/cygwin/select.cc b/winsup/cygwin/select.cc
index 524e578..647c758 100644
--- a/winsup/cygwin/select.cc
+++ b/winsup/cygwin/select.cc
@@ -77,8 +77,6 @@ details. */
(fd_set *) __res; \
})
-#define copyfd_set(to, from, n) memcpy (to, from, sizeof_fd_set (n));
-
#define set_handle_or_return_if_not_open(h, s) \
h = (s)->fh->get_io_handle_cyg (); \
if (cygheap->fdtab.not_open ((s)->fd)) \
@@ -132,6 +130,7 @@ select (int maxfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
DWORD ms)
{
int res = select_stuff::select_loop;
+ int ret = 0;
/* Record the current time for later use. */
LONGLONG start_time = gtod.msecs ();
@@ -187,14 +186,15 @@ select (int maxfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
select_printf ("res %d", res);
if (res >= 0)
{
- copyfd_set (readfds, r, maxfds);
- copyfd_set (writefds, w, maxfds);
- copyfd_set (exceptfds, e, maxfds);
- if (res == select_stuff::select_set_zero)
- res = 0;
- else
- /* Set the bit mask from sel records */
- res = sel.poll (readfds, writefds, exceptfds) ?: select_stuff::select_loop;
+ UNIX_FD_ZERO (readfds, maxfds);
+ UNIX_FD_ZERO (writefds, maxfds);
+ UNIX_FD_ZERO (writefds, maxfds);
+ /* Set bit mask from sel records, even in case of a timeout. This
+ also sets ret to the right value >= 0, matching the number of
+ bits set in the fds records. */
+ ret = sel.poll (readfds, writefds, exceptfds);
+ if (!ret && res != select_stuff::select_set_zero)
+ res = select_stuff::select_loop;
}
/* Always clean up everything here. If we're looping then build it
all up again. */
@@ -219,9 +219,9 @@ select (int maxfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
}
}
- if (res < -1)
- res = -1;
- return res;
+ if (res < 0)
+ ret = -1;
+ return ret;
}
extern "C" int
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Maintainer cygwin AT cygwin DOT com
Red Hat
[-- Attachment #2: signature.asc --]
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^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: cygwin.dll: bug with select on Windows console
2016-01-07 17:30 ` Corinna Vinschen
@ 2016-01-07 18:18 ` John Hood
2016-01-07 18:55 ` John Hood
2016-01-08 16:31 ` Corinna Vinschen
0 siblings, 2 replies; 18+ messages in thread
From: John Hood @ 2016-01-07 18:18 UTC (permalink / raw)
To: cygwin, corinna-cygwin
[-- Attachment #1: Type: text/plain, Size: 5879 bytes --]
Sorry about forgetting the testcase (which was good, actually, that
version had a bug). I've attached it here. This takes a single
argument, the timeout value for select() in microseconds. A value of
1000000 is fine for testing this issue. Type at it, or just bang on the
keyboard with random keystrokes, and it will report the results from
select() and the characters read. On a Windows console, it should
report an error within a few seconds. Moving the mouse cursor over the
Windows console window while typing seems to provoke the error as well.
On mintty or any other pty, the error never occurs.
I've been unable to build Cygwin from Git on my 32-bit install on Win7,
thanks to various header mismatches and missing packages-- I think the
latest was a mingw-gcc header, but I can't check that machine now. The
FAQ entry on how to build Cygwin is quite incomplete. Are there any
better directions for building Cygwin?
regards,
--jh
On 01/07/2016 12:30, Corinna Vinschen wrote:
> Hi John,
>
> On Dec 27 20:49, john hood wrote:
>> Hi all,
>>
>> I'm one of the Mosh maintainers. Recently a user reported a problem
>> where Mosh exits suddenly soon after startup while he is typing at it,
>> see <https://github.com/mobile-shell/mosh/issues/705>.
>>
>> The problem turns out to be that occasionally, select() times out,
>> returns 0 as it should, but does *not* clear the fd_sets() passed in--
>> they are left unaltered. Mosh doesn't pay any attention to the count of
>> ready fds and relies on the returned fd_sets being accurate. Mosh sets
>> the read fd_set and the error fd_set, and when it encounters this
>> situation, it exits quietly when an error is found on one of the files
>> involved (rather poor error handling on our part).
>>
>> This only seems to happen on Windows Console. select() seems to operate
>> reliably when used on a pty, whether from mintty, xterm, or sshd.
>>
>> My read of the POSIX standard is that select() should always set the
>> fd_sets on a successful return (rv >= 0). There is a bit of ambiguity
>> around this point, but given that Cygwin is inconsistent with itself (on
>> ptys) and with every other Unix platform, I think it's a bug.
>>
>> I've attached a little demo program for the bug. Compile, run as
>> "socket-t 1000" (the argument is the number of microseconds select()
>> should wait), and mash keys on the keyboard for a little while. It
>> should report errors within 100 keystrokes. I think there might be a
>> dependency on the length of the wait passed to select(), I don't see the
>> problem happening with the wait set to 100 seconds.
> Unfortunately you missed to attach the testcase. I checked Cygwin's
> select and I can see what might be the reason for what you're observing.
> I might even have a fix. But what bugs me is that I don't see how this
> condition could be met at all, especially not in case of selecting on
> the console. Your testcase would be greatly appreciated.
>
> For further discussion I attached the patch I'm proposing. AFAICS,
> copying the content of r,w,e over to readfds,writefds,exceptfds doesn't
> really make sense, unless r,w,e are still unchanged (i.e. zeroed out).
> However, *if* r,w,e have set bits, sel.wait should have returned
> select_ok, not select_set_zero. I don't see how this might occur.
> That's what your testcase hopefully helps to uncover.
>
> Another hiccup with copying r,w,e to readfds,writefds,exceptfds and then
> calling sel.poll is this: The number of set bits is *only* determined
> by sel.poll. If there are any other bits set in r,w,e, the result of
> sel.poll might not reflect this and the return value is not equal to the
> number of bits set in the records. Obviously this is not a problem in
> your case since you don't check the return value, but other applications
> might.
>
>
> Thanks,
> Corinna
>
>
> diff --git a/winsup/cygwin/select.cc b/winsup/cygwin/select.cc
> index 524e578..647c758 100644
> --- a/winsup/cygwin/select.cc
> +++ b/winsup/cygwin/select.cc
> @@ -77,8 +77,6 @@ details. */
> (fd_set *) __res; \
> })
>
> -#define copyfd_set(to, from, n) memcpy (to, from, sizeof_fd_set (n));
> -
> #define set_handle_or_return_if_not_open(h, s) \
> h = (s)->fh->get_io_handle_cyg (); \
> if (cygheap->fdtab.not_open ((s)->fd)) \
> @@ -132,6 +130,7 @@ select (int maxfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
> DWORD ms)
> {
> int res = select_stuff::select_loop;
> + int ret = 0;
>
> /* Record the current time for later use. */
> LONGLONG start_time = gtod.msecs ();
> @@ -187,14 +186,15 @@ select (int maxfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
> select_printf ("res %d", res);
> if (res >= 0)
> {
> - copyfd_set (readfds, r, maxfds);
> - copyfd_set (writefds, w, maxfds);
> - copyfd_set (exceptfds, e, maxfds);
> - if (res == select_stuff::select_set_zero)
> - res = 0;
> - else
> - /* Set the bit mask from sel records */
> - res = sel.poll (readfds, writefds, exceptfds) ?: select_stuff::select_loop;
> + UNIX_FD_ZERO (readfds, maxfds);
> + UNIX_FD_ZERO (writefds, maxfds);
> + UNIX_FD_ZERO (writefds, maxfds);
> + /* Set bit mask from sel records, even in case of a timeout. This
> + also sets ret to the right value >= 0, matching the number of
> + bits set in the fds records. */
> + ret = sel.poll (readfds, writefds, exceptfds);
> + if (!ret && res != select_stuff::select_set_zero)
> + res = select_stuff::select_loop;
> }
> /* Always clean up everything here. If we're looping then build it
> all up again. */
> @@ -219,9 +219,9 @@ select (int maxfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
> }
> }
>
> - if (res < -1)
> - res = -1;
> - return res;
> + if (res < 0)
> + ret = -1;
> + return ret;
> }
>
> extern "C" int
>
[-- Attachment #2: socket-t.c --]
[-- Type: text/x-csrc, Size: 1610 bytes --]
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <sys/select.h>
int
main(int ac, char **av)
{
if (ac != 2) return 1;
int time;
time = atoi(av[1]);
if (setvbuf(stdin, NULL, _IONBF, 0) != 0) {
err(1, "setvbuf");
}
struct termios o, n;
tcgetattr(0, &o);
tcgetattr(0, &n);
cfmakeraw(&n);
tcsetattr(0, TCSADRAIN, &n);
while (1) {
while (1) {
fd_set reads, errors;
FD_ZERO(&reads);
FD_ZERO(&errors);
FD_SET(0, &reads);
FD_SET(0, &errors);
struct timeval tv;
tv.tv_sec = time / 1000000;
tv.tv_usec = time % 1000000;
printf("select: ");
int rv = select(1, &reads, NULL, &errors, &tv);
printf("rv = %d, errno = %s\r\n", rv, strerror(errno));
if (rv == 0) {
if (FD_ISSET(0, &reads)) printf ("unexpected read\r\n");
if (FD_ISSET(0, &errors)) printf ("unexpected error\r\n");
if (FD_ISSET(0, &reads) || FD_ISSET(0, &errors)) break;
// otherwise continue
} else if (rv == 1) {
if (FD_ISSET(0, &reads)) {
// select found something normally, go read it
break;
} else if (FD_ISSET(0, &errors)) {
printf("error on stdin\r\n");
break;
} else {
printf("no ready fd found\r\n");
break;
}
} else if (rv > 1) {
printf("unexpected count = %d\r\n", rv);
break;
} else {
printf("rv %d, error %s\r\n", rv, strerror(errno));
break;
}
}
printf("reading char: ");
char c = getc(stdin);
if (c == 0x7f) break;
printf("got 0x%02x\r\n", c);
}
tcsetattr(0, TCSADRAIN, &o);
return 0;
}
[-- Attachment #3: Type: text/plain, Size: 218 bytes --]
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^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: cygwin.dll: bug with select on Windows console
2016-01-07 18:18 ` John Hood
@ 2016-01-07 18:55 ` John Hood
2016-01-08 16:31 ` Corinna Vinschen
1 sibling, 0 replies; 18+ messages in thread
From: John Hood @ 2016-01-07 18:55 UTC (permalink / raw)
To: cygwin, corinna-cygwin
[-- Attachment #1: Type: text/plain, Size: 5879 bytes --]
Sorry about forgetting the testcase (which was good, actually, that
version had a bug). I've attached it here. This takes a single
argument, the timeout value for select() in microseconds. A value of
1000000 is fine for testing this issue. Type at it, or just bang on the
keyboard with random keystrokes, and it will report the results from
select() and the characters read. On a Windows console, it should
report an error within a few seconds. Moving the mouse cursor over the
Windows console window while typing seems to provoke the error as well.
On mintty or any other pty, the error never occurs.
I've been unable to build Cygwin from Git on my 32-bit install on Win7,
thanks to various header mismatches and missing packages-- I think the
latest was a mingw-gcc header, but I can't check that machine now. The
FAQ entry on how to build Cygwin is quite incomplete. Are there any
better directions for building Cygwin?
regards,
--jh
On 01/07/2016 12:30, Corinna Vinschen wrote:
> Hi John,
>
> On Dec 27 20:49, john hood wrote:
>> Hi all,
>>
>> I'm one of the Mosh maintainers. Recently a user reported a problem
>> where Mosh exits suddenly soon after startup while he is typing at it,
>> see <https://github.com/mobile-shell/mosh/issues/705>.
>>
>> The problem turns out to be that occasionally, select() times out,
>> returns 0 as it should, but does *not* clear the fd_sets() passed in--
>> they are left unaltered. Mosh doesn't pay any attention to the count of
>> ready fds and relies on the returned fd_sets being accurate. Mosh sets
>> the read fd_set and the error fd_set, and when it encounters this
>> situation, it exits quietly when an error is found on one of the files
>> involved (rather poor error handling on our part).
>>
>> This only seems to happen on Windows Console. select() seems to operate
>> reliably when used on a pty, whether from mintty, xterm, or sshd.
>>
>> My read of the POSIX standard is that select() should always set the
>> fd_sets on a successful return (rv >= 0). There is a bit of ambiguity
>> around this point, but given that Cygwin is inconsistent with itself (on
>> ptys) and with every other Unix platform, I think it's a bug.
>>
>> I've attached a little demo program for the bug. Compile, run as
>> "socket-t 1000" (the argument is the number of microseconds select()
>> should wait), and mash keys on the keyboard for a little while. It
>> should report errors within 100 keystrokes. I think there might be a
>> dependency on the length of the wait passed to select(), I don't see the
>> problem happening with the wait set to 100 seconds.
> Unfortunately you missed to attach the testcase. I checked Cygwin's
> select and I can see what might be the reason for what you're observing.
> I might even have a fix. But what bugs me is that I don't see how this
> condition could be met at all, especially not in case of selecting on
> the console. Your testcase would be greatly appreciated.
>
> For further discussion I attached the patch I'm proposing. AFAICS,
> copying the content of r,w,e over to readfds,writefds,exceptfds doesn't
> really make sense, unless r,w,e are still unchanged (i.e. zeroed out).
> However, *if* r,w,e have set bits, sel.wait should have returned
> select_ok, not select_set_zero. I don't see how this might occur.
> That's what your testcase hopefully helps to uncover.
>
> Another hiccup with copying r,w,e to readfds,writefds,exceptfds and then
> calling sel.poll is this: The number of set bits is *only* determined
> by sel.poll. If there are any other bits set in r,w,e, the result of
> sel.poll might not reflect this and the return value is not equal to the
> number of bits set in the records. Obviously this is not a problem in
> your case since you don't check the return value, but other applications
> might.
>
>
> Thanks,
> Corinna
>
>
> diff --git a/winsup/cygwin/select.cc b/winsup/cygwin/select.cc
> index 524e578..647c758 100644
> --- a/winsup/cygwin/select.cc
> +++ b/winsup/cygwin/select.cc
> @@ -77,8 +77,6 @@ details. */
> (fd_set *) __res; \
> })
>
> -#define copyfd_set(to, from, n) memcpy (to, from, sizeof_fd_set (n));
> -
> #define set_handle_or_return_if_not_open(h, s) \
> h = (s)->fh->get_io_handle_cyg (); \
> if (cygheap->fdtab.not_open ((s)->fd)) \
> @@ -132,6 +130,7 @@ select (int maxfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
> DWORD ms)
> {
> int res = select_stuff::select_loop;
> + int ret = 0;
>
> /* Record the current time for later use. */
> LONGLONG start_time = gtod.msecs ();
> @@ -187,14 +186,15 @@ select (int maxfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
> select_printf ("res %d", res);
> if (res >= 0)
> {
> - copyfd_set (readfds, r, maxfds);
> - copyfd_set (writefds, w, maxfds);
> - copyfd_set (exceptfds, e, maxfds);
> - if (res == select_stuff::select_set_zero)
> - res = 0;
> - else
> - /* Set the bit mask from sel records */
> - res = sel.poll (readfds, writefds, exceptfds) ?: select_stuff::select_loop;
> + UNIX_FD_ZERO (readfds, maxfds);
> + UNIX_FD_ZERO (writefds, maxfds);
> + UNIX_FD_ZERO (writefds, maxfds);
> + /* Set bit mask from sel records, even in case of a timeout. This
> + also sets ret to the right value >= 0, matching the number of
> + bits set in the fds records. */
> + ret = sel.poll (readfds, writefds, exceptfds);
> + if (!ret && res != select_stuff::select_set_zero)
> + res = select_stuff::select_loop;
> }
> /* Always clean up everything here. If we're looping then build it
> all up again. */
> @@ -219,9 +219,9 @@ select (int maxfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
> }
> }
>
> - if (res < -1)
> - res = -1;
> - return res;
> + if (res < 0)
> + ret = -1;
> + return ret;
> }
>
> extern "C" int
>
[-- Attachment #2: socket-t.c --]
[-- Type: text/x-csrc, Size: 1610 bytes --]
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <sys/select.h>
int
main(int ac, char **av)
{
if (ac != 2) return 1;
int time;
time = atoi(av[1]);
if (setvbuf(stdin, NULL, _IONBF, 0) != 0) {
err(1, "setvbuf");
}
struct termios o, n;
tcgetattr(0, &o);
tcgetattr(0, &n);
cfmakeraw(&n);
tcsetattr(0, TCSADRAIN, &n);
while (1) {
while (1) {
fd_set reads, errors;
FD_ZERO(&reads);
FD_ZERO(&errors);
FD_SET(0, &reads);
FD_SET(0, &errors);
struct timeval tv;
tv.tv_sec = time / 1000000;
tv.tv_usec = time % 1000000;
printf("select: ");
int rv = select(1, &reads, NULL, &errors, &tv);
printf("rv = %d, errno = %s\r\n", rv, strerror(errno));
if (rv == 0) {
if (FD_ISSET(0, &reads)) printf ("unexpected read\r\n");
if (FD_ISSET(0, &errors)) printf ("unexpected error\r\n");
if (FD_ISSET(0, &reads) || FD_ISSET(0, &errors)) break;
// otherwise continue
} else if (rv == 1) {
if (FD_ISSET(0, &reads)) {
// select found something normally, go read it
break;
} else if (FD_ISSET(0, &errors)) {
printf("error on stdin\r\n");
break;
} else {
printf("no ready fd found\r\n");
break;
}
} else if (rv > 1) {
printf("unexpected count = %d\r\n", rv);
break;
} else {
printf("rv %d, error %s\r\n", rv, strerror(errno));
break;
}
}
printf("reading char: ");
char c = getc(stdin);
if (c == 0x7f) break;
printf("got 0x%02x\r\n", c);
}
tcsetattr(0, TCSADRAIN, &o);
return 0;
}
[-- Attachment #3: Type: text/plain, Size: 218 bytes --]
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^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: cygwin.dll: bug with select on Windows console
2016-01-07 18:18 ` John Hood
2016-01-07 18:55 ` John Hood
@ 2016-01-08 16:31 ` Corinna Vinschen
2016-01-08 21:30 ` john hood
1 sibling, 1 reply; 18+ messages in thread
From: Corinna Vinschen @ 2016-01-08 16:31 UTC (permalink / raw)
To: cygwin; +Cc: John Hood
[-- Attachment #1: Type: text/plain, Size: 1715 bytes --]
On Jan 7 13:18, John Hood wrote:
> Sorry about forgetting the testcase (which was good, actually, that
> version had a bug). I've attached it here. This takes a single
> argument, the timeout value for select() in microseconds. A value of
> 1000000 is fine for testing this issue. Type at it, or just bang on the
> keyboard with random keystrokes, and it will report the results from
> select() and the characters read. On a Windows console, it should
> report an error within a few seconds. Moving the mouse cursor over the
> Windows console window while typing seems to provoke the error as well.
No chance. I tried this for a good hour now with the unpatched Cygwin
DLL on 32 bit W7 and 64 bit W10 in 32 and 64 bit in a Windows console,
and I can't provoke this error. It just works for me.
> On mintty or any other pty, the error never occurs.
>
> I've been unable to build Cygwin from Git on my 32-bit install on Win7,
> thanks to various header mismatches and missing packages-- I think the
> latest was a mingw-gcc header, but I can't check that machine now. The
> FAQ entry on how to build Cygwin is quite incomplete. Are there any
> better directions for building Cygwin?
What exactly is failing? If you installed all the packages mentioned in
the FAQ entry, plus building outside the source tree as outlined, you
should be fine. Alternatively, install the cygport package and the
2.4.0-0.16 source package and build that via
cygport cygwin.cygport prep compile
That should get you started.
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Maintainer cygwin AT cygwin DOT com
Red Hat
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 819 bytes --]
^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: cygwin.dll: bug with select on Windows console
2016-01-08 16:31 ` Corinna Vinschen
@ 2016-01-08 21:30 ` john hood
2016-01-08 22:21 ` Achim Gratz
2016-01-09 14:41 ` Corinna Vinschen
0 siblings, 2 replies; 18+ messages in thread
From: john hood @ 2016-01-08 21:30 UTC (permalink / raw)
To: cygwin
On 1/8/16 11:29 AM, Corinna Vinschen wrote:
> On Jan 7 13:18, John Hood wrote:
>> Sorry about forgetting the testcase (which was good, actually, that
>> version had a bug). I've attached it here. This takes a single
>> argument, the timeout value for select() in microseconds. A value of
>> 1000000 is fine for testing this issue. Type at it, or just bang on the
>> keyboard with random keystrokes, and it will report the results from
>> select() and the characters read. On a Windows console, it should
>> report an error within a few seconds. Moving the mouse cursor over the
>> Windows console window while typing seems to provoke the error as well.
>
> No chance. I tried this for a good hour now with the unpatched Cygwin
> DLL on 32 bit W7 and 64 bit W10 in 32 and 64 bit in a Windows console,
> and I can't provoke this error. It just works for me.
My apologies for sending you down a wrong path. Try again with
"socket-t 1000", which only waits 1ms. I don't know what I was thinking
when I said the 1s timeout works fine. I have 3 machines available; on
two the problem occurs within 1-2s of typing or mousing, and the last
might take a couple of minutes. Don't spend too long trying to
reproduce this-- let me know and I'll try and figure out what other
variables might be at play. One possibility is that my main Windows
machine is relatively slow. It has an AMD E-350 CPU, which is
netbook-grade. At one point I noticed that select() takes over 1ms to
execute, which affects its check for a timeout in the loop over
the ready check. But then I saw that longer timeout values suffered the
problem as well, and the other two machines are faster Intel Core/Xeon
CPUs, Sandy Bridge or better.
>> On mintty or any other pty, the error never occurs.
>>
>> I've been unable to build Cygwin from Git on my 32-bit install on Win7,
>> thanks to various header mismatches and missing packages-- I think the
>> latest was a mingw-gcc header, but I can't check that machine now. The
>> FAQ entry on how to build Cygwin is quite incomplete. Are there any
>> better directions for building Cygwin?
>
> What exactly is failing? If you installed all the packages mentioned in
> the FAQ entry, plus building outside the source tree as outlined, you
> should be fine. Alternatively, install the cygport package and the
> 2.4.0-0.16 source package and build that via
It appears I had not installed all the packages because I didn't have
the setup command line syntax right, and didn't know it. setup
apparently does not do any validation of its command line arguments:
setup-x86.exe -M -P "docbook-xsl xmlto"
fails to install any packages, and
setup-x86.exe -M -P docbook-xsl xmlto
only installs the first. Neither give any indication that the command
line is incorrect.
regards,
--jh
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^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: cygwin.dll: bug with select on Windows console
2016-01-08 21:30 ` john hood
@ 2016-01-08 22:21 ` Achim Gratz
2016-01-09 14:41 ` Corinna Vinschen
1 sibling, 0 replies; 18+ messages in thread
From: Achim Gratz @ 2016-01-08 22:21 UTC (permalink / raw)
To: cygwin
john hood writes:
> It appears I had not installed all the packages because I didn't have
> the setup command line syntax right, and didn't know it. setup
> apparently does not do any validation of its command line arguments:
>
> setup-x86.exe -M -P "docbook-xsl xmlto"
>
> fails to install any packages, and
Because there is no package "docbook-xsl xmlto".
> setup-x86.exe -M -P docbook-xsl xmlto
>
> only installs the first.
Because non-option arguments are ignored when the command line is
processed as the corresponding handler is set to NULL and setup doesn't
check if there are any remaining arguments after option processing.
That could be changed, I guess.
> Neither give any indication that the command
> line is incorrect.
As far as setup is concerned, the command lines are correct. To do what
you want, you can either comma-separate the package names behind a
single package option
setup-x86.exe -M -P docbook-xsl,xmlto
or give one package per package option
setup-x86.exe -M -P docbook-xsl -P xmlto
or even mix the two styles
setup-x86.exe -M -P docbook-xsl,xmlto -P docbook-utils
HTH.
Regards,
Achim.
--
+<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+
DIY Stuff:
http://Synth.Stromeko.net/DIY.html
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^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: cygwin.dll: bug with select on Windows console
2016-01-08 21:30 ` john hood
2016-01-08 22:21 ` Achim Gratz
@ 2016-01-09 14:41 ` Corinna Vinschen
2016-01-09 14:42 ` Corinna Vinschen
2016-01-14 15:22 ` cygwin.dll: bug with select on Windows console / 2.4.0-0.19 Thomas Wolff
1 sibling, 2 replies; 18+ messages in thread
From: Corinna Vinschen @ 2016-01-09 14:41 UTC (permalink / raw)
To: cygwin
[-- Attachment #1: Type: text/plain, Size: 2206 bytes --]
On Jan 8 15:58, john hood wrote:
> On 1/8/16 11:29 AM, Corinna Vinschen wrote:
> > On Jan 7 13:18, John Hood wrote:
> >> Sorry about forgetting the testcase (which was good, actually, that
> >> version had a bug). I've attached it here. This takes a single
> >> argument, the timeout value for select() in microseconds. A value of
> >> 1000000 is fine for testing this issue. Type at it, or just bang on the
> >> keyboard with random keystrokes, and it will report the results from
> >> select() and the characters read. On a Windows console, it should
> >> report an error within a few seconds. Moving the mouse cursor over the
> >> Windows console window while typing seems to provoke the error as well.
> >
> > No chance. I tried this for a good hour now with the unpatched Cygwin
> > DLL on 32 bit W7 and 64 bit W10 in 32 and 64 bit in a Windows console,
> > and I can't provoke this error. It just works for me.
>
> My apologies for sending you down a wrong path. Try again with
> "socket-t 1000", which only waits 1ms. I don't know what I was thinking
> when I said the 1s timeout works fine.
This helped and I found the culprit. There are, in fact, two ways to
leave select with a timeout. One of them only occurs in the border
cases where a device behind a descriptor generates events which are
not supposed to generate a select event. If that happens, the select
loop is supposed to loop again, but the code first checks if the timeout
has been hit in the meantime and, if so, it breaks from the loop with a
timeout, aka, a return value of 0. However, in this single case, the
code neglected to zero out the descriptor arrays, which then leads to
the problem you encountered.
I fixed the code and took the opportunity to clean it up a little using
basically the (fixed) patch I proposed two days ago.
I've just uploaded new developer snapshots to https://cygwin.com/snapshots/
and a new test release 2.4.0-0.17 which contain this fix. Please give any
of them a try.
Thanks,
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Maintainer cygwin AT cygwin DOT com
Red Hat
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 819 bytes --]
^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: cygwin.dll: bug with select on Windows console
2016-01-09 14:41 ` Corinna Vinschen
@ 2016-01-09 14:42 ` Corinna Vinschen
2016-01-10 9:09 ` John Hood
2016-01-14 15:22 ` cygwin.dll: bug with select on Windows console / 2.4.0-0.19 Thomas Wolff
1 sibling, 1 reply; 18+ messages in thread
From: Corinna Vinschen @ 2016-01-09 14:42 UTC (permalink / raw)
To: cygwin; +Cc: John Hood
[-- Attachment #1: Type: text/plain, Size: 2451 bytes --]
On Jan 9 15:36, Corinna Vinschen wrote:
> On Jan 8 15:58, john hood wrote:
> > On 1/8/16 11:29 AM, Corinna Vinschen wrote:
> > > On Jan 7 13:18, John Hood wrote:
> > >> Sorry about forgetting the testcase (which was good, actually, that
> > >> version had a bug). I've attached it here. This takes a single
> > >> argument, the timeout value for select() in microseconds. A value of
> > >> 1000000 is fine for testing this issue. Type at it, or just bang on the
> > >> keyboard with random keystrokes, and it will report the results from
> > >> select() and the characters read. On a Windows console, it should
> > >> report an error within a few seconds. Moving the mouse cursor over the
> > >> Windows console window while typing seems to provoke the error as well.
> > >
> > > No chance. I tried this for a good hour now with the unpatched Cygwin
> > > DLL on 32 bit W7 and 64 bit W10 in 32 and 64 bit in a Windows console,
> > > and I can't provoke this error. It just works for me.
> >
> > My apologies for sending you down a wrong path. Try again with
> > "socket-t 1000", which only waits 1ms. I don't know what I was thinking
> > when I said the 1s timeout works fine.
>
> This helped and I found the culprit. There are, in fact, two ways to
> leave select with a timeout. One of them only occurs in the border
> cases where a device behind a descriptor generates events which are
> not supposed to generate a select event.
I forgot to mention, this affects especially consoles (window events,
mouse events) and /dev/windows.
> If that happens, the select
> loop is supposed to loop again, but the code first checks if the timeout
> has been hit in the meantime and, if so, it breaks from the loop with a
> timeout, aka, a return value of 0. However, in this single case, the
> code neglected to zero out the descriptor arrays, which then leads to
> the problem you encountered.
>
> I fixed the code and took the opportunity to clean it up a little using
> basically the (fixed) patch I proposed two days ago.
>
> I've just uploaded new developer snapshots to https://cygwin.com/snapshots/
> and a new test release 2.4.0-0.17 which contain this fix. Please give any
> of them a try.
>
>
> Thanks,
> Corinna
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Maintainer cygwin AT cygwin DOT com
Red Hat
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^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: cygwin.dll: bug with select on Windows console
2016-01-09 14:42 ` Corinna Vinschen
@ 2016-01-10 9:09 ` John Hood
2016-01-11 11:52 ` Corinna Vinschen
0 siblings, 1 reply; 18+ messages in thread
From: John Hood @ 2016-01-10 9:09 UTC (permalink / raw)
To: cygwin
On 1/9/2016 9:41 AM, Corinna Vinschen wrote:
> I fixed the code and took the opportunity to clean it up a little using
> >basically the (fixed) patch I proposed two days ago.
> >
> >I've just uploaded new developer snapshots tohttps://cygwin.com/snapshots/
> >and a new test release 2.4.0-0.17 which contain this fix. Please give any
> >of them a try.
I built from git master. Both the test program and mosh appear to be
seeing correct behavior from select() now.
Thanks,
--jh
--
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* Re: cygwin.dll: bug with select on Windows console
2016-01-10 9:09 ` John Hood
@ 2016-01-11 11:52 ` Corinna Vinschen
2016-01-12 17:32 ` john hood
0 siblings, 1 reply; 18+ messages in thread
From: Corinna Vinschen @ 2016-01-11 11:52 UTC (permalink / raw)
To: cygwin; +Cc: John Hood
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On Jan 10 05:04, John Hood wrote:
> On 1/9/2016 9:41 AM, Corinna Vinschen wrote:
> >I fixed the code and took the opportunity to clean it up a little using
> >>basically the (fixed) patch I proposed two days ago.
> >>
> >>I've just uploaded new developer snapshots tohttps://cygwin.com/snapshots/
> >>and a new test release 2.4.0-0.17 which contain this fix. Please give any
> >>of them a try.
> I built from git master. Both the test program and mosh appear to be seeing
> correct behavior from select() now.
Thanks for testing. Can you re-test with current git master? I reverted
one aspect of my change for performance.
Thanks,
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Maintainer cygwin AT cygwin DOT com
Red Hat
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^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: cygwin.dll: bug with select on Windows console
2016-01-11 11:52 ` Corinna Vinschen
@ 2016-01-12 17:32 ` john hood
2016-01-12 22:09 ` Corinna Vinschen
0 siblings, 1 reply; 18+ messages in thread
From: john hood @ 2016-01-12 17:32 UTC (permalink / raw)
To: cygwin
On 1/11/16 4:37 AM, Corinna Vinschen wrote:
> On Jan 10 05:04, John Hood wrote:
>> On 1/9/2016 9:41 AM, Corinna Vinschen wrote:
>>> I fixed the code and took the opportunity to clean it up a
>>> little using
>>>> basically the (fixed) patch I proposed two days ago.
>>>>
>>>> I've just uploaded new developer snapshots
>>>> tohttps://cygwin.com/snapshots/ and a new test release
>>>> 2.4.0-0.17 which contain this fix. Please give any of them a
>>>> try.
>> I built from git master. Both the test program and mosh appear
>> to be seeing correct behavior from select() now.
>
> Thanks for testing. Can you re-test with current git master? I
> reverted one aspect of my change for performance.
newlib-snapshot-20160104-14-g27086d6 tests OK, thanks!
regards,
--jh
--
Problem reports: http://cygwin.com/problems.html
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^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: cygwin.dll: bug with select on Windows console
2016-01-12 17:32 ` john hood
@ 2016-01-12 22:09 ` Corinna Vinschen
0 siblings, 0 replies; 18+ messages in thread
From: Corinna Vinschen @ 2016-01-12 22:09 UTC (permalink / raw)
To: cygwin; +Cc: john hood
[-- Attachment #1: Type: text/plain, Size: 1020 bytes --]
On Jan 12 12:27, john hood wrote:
> On 1/11/16 4:37 AM, Corinna Vinschen wrote:
> > On Jan 10 05:04, John Hood wrote:
> >> On 1/9/2016 9:41 AM, Corinna Vinschen wrote:
> >>> I fixed the code and took the opportunity to clean it up a
> >>> little using
> >>>> basically the (fixed) patch I proposed two days ago.
> >>>>
> >>>> I've just uploaded new developer snapshots
> >>>> tohttps://cygwin.com/snapshots/ and a new test release
> >>>> 2.4.0-0.17 which contain this fix. Please give any of them a
> >>>> try.
> >> I built from git master. Both the test program and mosh appear
> >> to be seeing correct behavior from select() now.
> >
> > Thanks for testing. Can you re-test with current git master? I
> > reverted one aspect of my change for performance.
>
> newlib-snapshot-20160104-14-g27086d6 tests OK, thanks!
Thank you!
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Maintainer cygwin AT cygwin DOT com
Red Hat
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^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: cygwin.dll: bug with select on Windows console / 2.4.0-0.19
2016-01-09 14:41 ` Corinna Vinschen
2016-01-09 14:42 ` Corinna Vinschen
@ 2016-01-14 15:22 ` Thomas Wolff
2016-01-14 20:24 ` Corinna Vinschen
1 sibling, 1 reply; 18+ messages in thread
From: Thomas Wolff @ 2016-01-14 15:22 UTC (permalink / raw)
To: cygwin
I have retested some past problems of select with -0.19 and found no
regression issues.
Thomas
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Problem reports: http://cygwin.com/problems.html
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^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: cygwin.dll: bug with select on Windows console / 2.4.0-0.19
2016-01-14 15:22 ` cygwin.dll: bug with select on Windows console / 2.4.0-0.19 Thomas Wolff
@ 2016-01-14 20:24 ` Corinna Vinschen
0 siblings, 0 replies; 18+ messages in thread
From: Corinna Vinschen @ 2016-01-14 20:24 UTC (permalink / raw)
To: cygwin
[-- Attachment #1: Type: text/plain, Size: 330 bytes --]
On Jan 14 16:01, Thomas Wolff wrote:
> I have retested some past problems of select with -0.19 and found no
> regression issues.
Thank you, that's good to know!
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Maintainer cygwin AT cygwin DOT com
Red Hat
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^ permalink raw reply [flat|nested] 18+ messages in thread
end of thread, other threads:[~2016-01-14 19:48 UTC | newest]
Thread overview: 18+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2015-12-28 1:50 cygwin.dll: bug with select on Windows console john hood
2016-01-02 2:06 ` John Hood
2016-01-03 0:45 ` Mark Geisert
2016-01-07 0:48 ` Mark Geisert
2016-01-07 17:30 ` Corinna Vinschen
2016-01-07 18:18 ` John Hood
2016-01-07 18:55 ` John Hood
2016-01-08 16:31 ` Corinna Vinschen
2016-01-08 21:30 ` john hood
2016-01-08 22:21 ` Achim Gratz
2016-01-09 14:41 ` Corinna Vinschen
2016-01-09 14:42 ` Corinna Vinschen
2016-01-10 9:09 ` John Hood
2016-01-11 11:52 ` Corinna Vinschen
2016-01-12 17:32 ` john hood
2016-01-12 22:09 ` Corinna Vinschen
2016-01-14 15:22 ` cygwin.dll: bug with select on Windows console / 2.4.0-0.19 Thomas Wolff
2016-01-14 20:24 ` Corinna Vinschen
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