> On 5/4/2012 3:43 PM, Petrisor Eddy-Marian-B36037 wrote: > > Hello, > > > > I am using at work cygwin on various machines (XP and Windows 7) and > made several scripts that use gnu utilities from cygwin. One of those is > a script that starts in paralel instances of cmd various parts of a build > system through a sh script that invokes 'cmd /C start ...' to start those > parts of the build system in a non-blocking fashion. > > > > Recently, on one of the machines which had its cygwin installation > upgraded, I have observed that the cmd instances do not start in a non- > blocking fashion anymore, but instead wait for the process to finish. > > > > > > To be more precise, following the following steps should lead to two > interactive windows, one with the sh prompt and one with the cmd prompt, > both waiting for user input: > > 1 - start a cygwin (or sh) command window > > 2 - type "cmd /C start cmd" > > try > cmd /C start cmd & > [Petrisor Eddy]
I know about how to work around the issue, but the problem is that cygwin somehow interacts with start and renders it useless. If 'cmd /C some_command' has the same effect as 'cmd /C start some_command' under sh/cygwin, while working as expected in pure cmd, then cygwin is behaving badly and this issue is the one to be addressed especially since it is a regression. > > > > > Expected result: > > Two interactive and usable windows, one with the sh prompt, one with > the cmd prompt, both waiting for user input. > > > > Actual result: > > Two windows, one with sh and one with cmd, Cygwin/sh window blocked and > waiting for the cmd window to finish. > > > > > > > > On another machine that hasn't had its cygwin install upgraded, the > behaviour is the expected one. Here are the versions of the relevant > packages that are found by the setup.exe to be upgradable on the working > machine and the versions of the same packages on the non-working machine: > > > > Working machine package versions: > > base-cygwin 3.0-1 > > csih 0.9.5-1 > > cygutils 1.4.8-1 > > cygwin 1.7.11-1 > > rebase 4.0.1-1 > > > > Non-working machine package versions: > > base-cygwin 3.1-1 > > csih 0.9.6-1 > > cygutils 1.4.10-2 > > cygwin 1.7.14-2 > > rebase 4.1.0-1 > > > > Note: There are other packages which could be upgraded on the working > machine, but they are irrelevant: diffutils, file, gawk, groff sed and > tzcode. > > > > > > Any help would be appreciated. > > > > P.S.: Please CC me, I am not subscribed. > > > > Eddy > > > -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
