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Dear list, Before the actual question, I wonder whether Wine specific issues are considered as off-topic here, and whether it is allowed here? Anyway, thanks for your great contribution on Cygwin! In the past few months, we were working on supporting Cygwin/MSYS2 on Wine (Wine Staging at this moment, we will upstream our patches lately). After fixing a couple of Wine Staging bugs [1], today Cygwin/MSYS2 works much better on Wine Staging than before. GCC/GDB/etc, including most part of toolchain, are now basically supported on Wine Staging 1.7.50. However, the remain bugs are difficult, so it would be great to have some help from Cygwin community to speed up the bug fix progress, many thanks for anyone interesting to join! ==== thanks for reading :) ==== Now, here is one bug blocks me for two days: On Cygwin Windows, `script -e -c "exit 5"` will always return 5; On Cygwin Wine, `script -e -c "exit 5"` sometimes returns 5 while sometimes return zero. I tested with a 100-times-loop, 34 of them return zero, while 66 of them return 5. Tested version: Cygwin: $ uname -a CYGWIN_NT-5.1 2.2.1(0.289/5/3) 2015-08-20 11:40 i686 Cygwin Wine: $ wine --version wine-1.7.50-823-ga81e861 (Staging) I try to strace `script`, and I found when strace is used, the failure rate down to 18/100: In a 100-times-loop with strace, 18 of scripts return 0, 82 of scripts return 5. I analysis the strace log, and I found a common pattern in all 18 failure logs: all of them have only 3 "ExitProcess" message, while in the other 82 success logs, each of them has 4 "ExitProcess" message. The attachment script.strace.good.txt is for the one returns none zero, the attachment script.strace.bad.txt is for the one returns zero. I dig with Cygwin source code for a bit, but I haven't figure out what's wrong yet, my main problem is I'm not familiar with the exit() implementation in Cygwin. I'm reading how-startup-shutdown-works.txt again, it does help but not enough. Anyone could provide some hints where to go on? I can update this thread with my debugging result later. Thanks very much for your help! [1] https://bugs.wine-staging.com/buglist.cgi?f1=short_desc&f2=short_desc&j_top=OR&list_id=3977&o1=anywordssubstr&o2=anywordssubstr&query_format=advanced&resolution=FIXED&v1=cygwin&v2=msys2 -- Regards, Qian Hong - http://www.winehq.org
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script.strace.good.txt
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