Re: Unix Domain Socket Limitation?
On 12/4/2020 8:51 AM, Norton Allen wrote: On 12/3/2020 8:11 PM, Ken Brown wrote: On 12/2/2020 12:30 PM, Norton Allen wrote: On 11/30/2020 9:22 PM, Norton Allen wrote: Yeah, so now the example no longer blocks for me. Unfortunately these bugs are not present in my application, so I will need to keep working on this. After paring the main application down and back up, I finally narrowed in on the condition that was causing this blocking behavior. The issue arises when a client connect()s twice to the same server with non-blocking unix-domain sockets before calling select(). There are a few pieces to this. With the client configured to connect() just once, I can see that the server's select() returns as soon as the client calls connect(), but then the server's accept() blocks until the client calls select(). That is not proper non-blocking behavior, but it appears that the implementation under Cygwin does require that client and server both be communicating synchronously to accomplish the connect() operation. I tried running this under Ubuntu 16.04 and found that connect() succeeded immediately, so no subsequent select() is required, and there does not appear to be a possibility for this collision. That proves to hold true even if the server is not waiting in select() to process the connect() with accept(). A workaround for this issue may be to keep the socket blocking until after connect(). I have pushed the new minimal example program, 'rapid_connects' to https://github.com/nthallen/cygwin_unix The server is run like before as: $ ./rapid_connects server The client can be run in two different modes. To connect with just one socket: $ ./rapid_connects client1 To connect with two: $ ./rapid_connects client2 My immediate strategy will be to develop a workaround for my project. Having spent a day inside cygwin1.dll, I can see that I have a steep learning curve to make much of a contribution there. I'm traveling at the moment and unable to do any testing, but I wonder if you're bumping into an issue that was just discussed on the cygwin-developers list: https://cygwin.com/pipermail/cygwin-developers/2020-December/012015.html A different workaround is described there. If it's the same issue, then I don't think it will happen with the new AF_UNIX implementation. More in a few days. It does seem related. A work around that is working for me is to do a blocking connect() and switch to non-blocking when that completes. In my application, the connect() generally occurs once at the beginning of a run, so blocking for a few milliseconds does not impact responsiveness. For the record, I can confirm that (a) the problem occurs with the current AF_UNIX implementation and (b) it does not occur with the new implementation (on the topic/af_unix branch). With both client1 and client2, I see "connect() apparently succeeded immediately" using the new implementation. The new implementation is not yet ready for prime time, but with any luck it might be ready within a few months. Ken -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation:https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
[ANNOUNCEMENT] Updated: Perl distributions
The following Perl distributions have been updated to their latest release version available on CPAN: x86/x86_64 -- perl-DateTime-1.54-1 -- *** CYGWIN-ANNOUNCE UNSUBSCRIBE INFO *** If you want to unsubscribe from the cygwin-announce mailing list, look at the "List-Unsubscribe: " tag in the email header of this message. Send email to the address specified there. It will be in the format: cygwin-announce-unsubscribe-you=yourdomain@cygwin.com If you need more information on unsubscribing, start reading here: http://sourceware.org/lists.html#unsubscribe-simple Please read *all* of the information on unsubscribing that is available starting at this URL. -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation:https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
Updated: Perl distributions
The following Perl distributions have been updated to their latest release version available on CPAN: x86/x86_64 -- perl-DateTime-1.54-1 -- *** CYGWIN-ANNOUNCE UNSUBSCRIBE INFO *** If you want to unsubscribe from the cygwin-announce mailing list, look at the "List-Unsubscribe: " tag in the email header of this message. Send email to the address specified there. It will be in the format: cygwin-announce-unsubscribe-you=yourdomain@cygwin.com If you need more information on unsubscribing, start reading here: http://sourceware.org/lists.html#unsubscribe-simple Please read *all* of the information on unsubscribing that is available starting at this URL.
[ANNOUNCEMENT] Updated: libarchive-3.5.0-1, mingw64-{x86_64, i686}-libarchive-3.5.0-1
Libarchive has been updated to version 3.5.0-1, the following (sub-)packages: libarchive (source) libarchive-devel libarchive13 bsdcat bsdcpio bsdtar mingw64-i686-libarchive mingw64-x86_64-libarchive are available in the Cygwin distribution. The MinGW64 packages for the cross-compilation toolchains have now been updated as well: CHANGES Fixes to configure for Cygwin and enabling of ZStd and LZO compression formats (since version 3.4.3). DESCRIPTION Multi-format archive and compression library It is a portable, efficient C library that can read and write streaming archives in a variety of formats. It also includes implementations of the common tar, cpio, and zcat command-line tools that use the libarchive library. HOMEPAGE https://www.libarchive.org/ -- *** CYGWIN-ANNOUNCE UNSUBSCRIBE INFO *** If you want to unsubscribe from the cygwin-announce mailing list, look at the "List-Unsubscribe: " tag in the email header of this message. Send email to the address specified there. It will be in the format: cygwin-announce-unsubscribe-you=yourdomain@cygwin.com If you need more information on unsubscribing, start reading here: http://sourceware.org/lists.html#unsubscribe-simple Please read *all* of the information on unsubscribing that is available starting at this URL. -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation:https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
Updated: libarchive-3.5.0-1, mingw64-{x86_64, i686}-libarchive-3.5.0-1
Libarchive has been updated to version 3.5.0-1, the following (sub-)packages: libarchive (source) libarchive-devel libarchive13 bsdcat bsdcpio bsdtar mingw64-i686-libarchive mingw64-x86_64-libarchive are available in the Cygwin distribution. The MinGW64 packages for the cross-compilation toolchains have now been updated as well: CHANGES Fixes to configure for Cygwin and enabling of ZStd and LZO compression formats (since version 3.4.3). DESCRIPTION Multi-format archive and compression library It is a portable, efficient C library that can read and write streaming archives in a variety of formats. It also includes implementations of the common tar, cpio, and zcat command-line tools that use the libarchive library. HOMEPAGE https://www.libarchive.org/ -- *** CYGWIN-ANNOUNCE UNSUBSCRIBE INFO *** If you want to unsubscribe from the cygwin-announce mailing list, look at the "List-Unsubscribe: " tag in the email header of this message. Send email to the address specified there. It will be in the format: cygwin-announce-unsubscribe-you=yourdomain@cygwin.com If you need more information on unsubscribing, start reading here: http://sourceware.org/lists.html#unsubscribe-simple Please read *all* of the information on unsubscribing that is available starting at this URL.
Re: Environment variable named !:: (exclamation mark + colon + colon)
On Sat, 5 Dec 2020 at 15:25, tzccinct wrote: > > Hi, > > I have found an environment variable that has a strange name `!::' > (exclamation mark + colon + colon) on my terminal (both mintty and Tera > Term). The value is also strange, `::\' (colon + colon + backslash). > > $ env | sort | head -n 3 > !::=::\ > _=/usr/bin/env > ALLUSERSPROFILE=C:\ProgramData > This seems to be related : https://unix.stackexchange.com/questions/251174/strange-environment-variable-in-cygwin Csaba -- You can get very substantial performance improvements by not doing the right thing. - Scott Meyers, An Effective C++11/14 Sampler So if you're looking for a completely portable, 100% standards-conformant way to get the wrong information: this is what you want. - Scott Meyers (C++TDaWYK) -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation:https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
Re: ssh to cygwin-box and access remote exe fails saying exe is a directory
I feel, i got the answer to the question here: https://superuser.com/questions/1607551/remote-login-using-ssh-keys-vs-password-weird-error-is-a-directory/1607563 This issue may be marked as close. On Sat, Dec 5, 2020 at 7:16 PM Raj Kumar Sanpui wrote: > I haven't received any help/suggestions from the forum, but i tried > digging deeper. > Now i can see the "Is a directory" error happens if I do passwordless ssh > (copying my public key using ssh-copy-id) to remote Cygwin box and try > executing the exe, i get the error. > > rsanpui@cygwin ~ > $ "//DNVM/E920/System920/x86/MyWorld Client Install/install/setup.exe" > -bash: //DNVM/E920/System920/x86/MyWorld Client Install/install/setup.exe: Is > a directory > > > If i do a usual password based logging using ssh, then there is no error > message. > rsanpui@cygwin ~ >$ "//DNVM/E920/System920/x86/MyWorld Client Install/install/setup.exe" > > Guys, i am really stuck as we are trying to develop an application which > will do passwordless ssh and execution of the exe. Can someone please > suggest? > > On Wed, Oct 14, 2020 at 11:23 AM Raj Kumar Sanpui < > raj.kumar.san...@gmail.com> wrote: > >> Hi All, >> >> I am trying to access an exe hosted in a shared drive in a remote machine. >> (Please note: T*he exe is NOT hosted on the box where cygwin is >> installed but a different one*.) >> >> >> *Case 1: Which fails* >> If i ssh to the Windows box where cygwin is installed, and then try to >> access the remote exe it *fails saying "exe is a directory"* >> >> [rundeck@den PKG_INSTALL_SERVICE]$ cat snapshot1.bat | ssh >> rsanpui@cygwin-box >> >> Pseudo-terminal will not be allocated because stdin is not a terminal. >> -bash: line 1: //remote-box/owshare/owinstal/Snapshot/SnapShot.exe: *Is >> a directory* >> >> What i have inside snapshot1.bat is simple - >> [rundeck@den PKG_INSTALL_SERVICE]$ cat snapshot1.bat >> "//remote-box/owshare/owinstal/Snapshot/SnapShot.exe" >> >> *Case 2: Which works* >> If i login to the Windows VM where cygwin is installed, and try to access >> the same remote exe it works. >> >> What am I missing? Please advise. >> >> Thanks >> >> >> >> >> >> -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation:https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
gnuplot post-install : exit code 1
Both cygwin32 and cygwin64, both up-to-date: Following recent update to gnuplot I'm getting post-install errors as follows in both setup logs: running: D:\cygwin..\bin\bash.exe --norc --noprofile "/etc/postinstall/gnuplot.sh" abnormal exit: exit code=1 My installed.db shows gnuplot-X11 gnuplot-X11-5.4.1-1.tar.bz2 1 gnuplot-base gnuplot-base-5.4.1-1.tar.bz2 0 for both 32 and 64 bit setups. Previously to this update, no such messages. Any ideas? -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation:https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
Environment variable named !:: (exclamation mark + colon + colon)
Hi, I have found an environment variable that has a strange name `!::' (exclamation mark + colon + colon) on my terminal (both mintty and Tera Term). The value is also strange, `::\' (colon + colon + backslash). $ env | sort | head -n 3 !::=::\ _=/usr/bin/env ALLUSERSPROFILE=C:\ProgramData Is this an expected environment variable on Cygwin? If so, what is this for? Best regards, tzccinct -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation:https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
Re: ssh to cygwin-box and access remote exe fails saying exe is a directory
I haven't received any help/suggestions from the forum, but i tried digging deeper. Now i can see the "Is a directory" error happens if I do passwordless ssh (copying my public key using ssh-copy-id) to remote Cygwin box and try executing the exe, i get the error. rsanpui@cygwin ~ $ "//DNVM/E920/System920/x86/MyWorld Client Install/install/setup.exe" -bash: //DNVM/E920/System920/x86/MyWorld Client Install/install/setup.exe: Is a directory If i do a usual password based logging using ssh, then there is no error message. rsanpui@cygwin ~ $ "//DNVM/E920/System920/x86/MyWorld Client Install/install/setup.exe" Guys, i am really stuck as we are trying to develop an application which will do passwordless ssh and execution of the exe. Can someone please suggest? On Wed, Oct 14, 2020 at 11:23 AM Raj Kumar Sanpui < raj.kumar.san...@gmail.com> wrote: > Hi All, > > I am trying to access an exe hosted in a shared drive in a remote machine. > (Please note: T*he exe is NOT hosted on the box where cygwin is installed > but a different one*.) > > > *Case 1: Which fails* > If i ssh to the Windows box where cygwin is installed, and then try to > access the remote exe it *fails saying "exe is a directory"* > > [rundeck@den PKG_INSTALL_SERVICE]$ cat snapshot1.bat | ssh > rsanpui@cygwin-box > > Pseudo-terminal will not be allocated because stdin is not a terminal. > -bash: line 1: //remote-box/owshare/owinstal/Snapshot/SnapShot.exe: *Is a > directory* > > What i have inside snapshot1.bat is simple - > [rundeck@den PKG_INSTALL_SERVICE]$ cat snapshot1.bat > "//remote-box/owshare/owinstal/Snapshot/SnapShot.exe" > > *Case 2: Which works* > If i login to the Windows VM where cygwin is installed, and try to access > the same remote exe it works. > > What am I missing? Please advise. > > Thanks > > > > > > -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation:https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
Re: setup.exe corruption
How does this acl option work? Im on Win 10 Home. On Thu, Apr 16, 2020 at 9:10 AM o lu wrote: > How does the acl option work? I ran it on a regular Windows directory (to > my knowledge). > > Your english is fine. > > On Thu, Apr 16, 2020 at 4:20 AM Andrey Repin wrote: > >> Greetings, o lu! >> >> > It worked, but I dont understand on Windows >> >> If you have downloaded it into a directory mounted with "acl" option, >> POSIX >> behavior apply. >> >> >> -- >> With best regards, >> Andrey Repin >> Thursday, April 16, 2020 11:06:22 >> >> Sorry for my terrible english... >> >> -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation:https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
Re: blockdev.exe is missing in util-linux. How to determine block device size in bash?
Strange. On Win7 this doesn't work: il@mar2 /cygdrive/c/Windows/System32 $ cat /proc/partitions major minor #blocks name win-mounts 8 0 0 sda 816 0 sdb il@mar2 /cygdrive/c/Windows/System32 $ dd of=/dev/null if=/dev/sda bs=1M count=100 100+0 records in 100+0 records out 104857600 bytes (105 MB, 100 MiB) copied, 0.215181 s, 487 MB/s On 28.11.2020 20:04, Brian Inglis wrote: > $ cat /proc/partitions > major minor #blocks name win-mounts > > 8 0 976762584 sda > 8 1 16384 sda1 > 8 2 97678 sda2 C:\ > 816 976762584 sdb > 817131072 sdb1 > 818102400 sdb2 > 819 975482161 sdb3 D:\ > 820577536 sdb4 > 821465920 sdb5 > 832 0 sdc -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation:https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
