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[Python-Dev] Strange umask(?)/st_mode issue
Kushal Kumarankushal at locationd.net
Sat Mar 30 14:00:25 EDT 2019
Steve Dower <steve.dower at python.org> writes:> On 29Mar.2019 1944, Steve Dower wrote:>> On 29Mar.2019 1939, Cameron Simpson wrote:>>> Can you get a branch into your pipeline? Then you could just hack the>>> tarfile test with something quick and dirty like:>>>>>> pid = os.getpid()>>> system("strace -p %d 2>/path/to/strace.out &" % pid)>>> time.sleep(2) # get strace heaps of time to start>>>>>> just before the tarfile open. A ghastly hack but it would get you>>> debugging info. You could even decide to remove the strace.out file if>>> the umask issue doesn't show, if it is erratic (can't see why it would>>> be though).>>>> Perfect, I'll give this a go. Thanks!>> I set up a PR to collect this trace and the results are at:>https://github.com/python/cpython/pull/12625>> However, I suspect it's a non-result:>> umask(022) = 022> open("/home/vsts/work/1/s/build/test_python_5154/@test_5154_tmp-tardir/tmp.tar",> O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC, 0666) = 3> write(3, "BZh91AY&SYY{\270\344\0\0\24P\0\300\0\4\0\0\10> \0000\314\5)\246"..., 46) = 46> close(3) = 0> stat("/home/vsts/work/1/s/build/test_python_5154/@test_5154_tmp-tardir/tmp.tar",> {st_mode=S_IFREG|0666, st_size=46, ...}) = 0>> Happy to take more suggestions if anyone has them.>The file must exist already. Try moving the strace capturing to beforethe unlink.-- regards,kushal
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