view tests/sslcerts/client-cert.pem @ 45095:8e04607023e5

procutil: ensure that procutil.std{out,err}.write() writes all bytes

Python 3 offers different kind of streams and it’s not guaranteed for all of
them that calling write() writes all bytes.

When Python is started in unbuffered mode, sys.std{out,err}.buffer are
instances of io.FileIO, whose write() can write less bytes for
platform-specific reasons (e.g. Linux has a 0x7ffff000 bytes maximum and could
write less if interrupted by a signal; when writing to Windows consoles, it’s
limited to 32767 bytes to avoid the "not enough space" error). This can lead to
silent loss of data, both when using sys.std{out,err}.buffer (which may in fact
not be a buffered stream) and when using the text streams sys.std{out,err}
(I’ve created a CPython bug report for that:
https://bugs.python.org/issue41221).

Python may fix the problem at some point. For now, we implement our own wrapper
for procutil.std{out,err} that calls the raw stream’s write() method until all
bytes have been written. We don’t use sys.std{out,err} for larger writes, so I
think it’s not worth the effort to patch them.

-----BEGIN CERTIFICATE-----
MIICyTCCAbECAQEwDQYJKoZIhvcNAQELBQAwMTESMBAGA1UEAwwJbG9jYWxob3N0
MRswGQYJKoZIhvcNAQkBFgxoZ0Bsb2NhbGhvc3QwHhcNMTYwNzEzMDQ0NzIxWhcN
NDEwMzA0MDQ0NzIxWjAkMSIwIAYJKoZIhvcNAQkBFhNoZy1jbGllbnRAbG9jYWxo
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gbhauwIDAQABMA0GCSqGSIb3DQEBCwUAA4IBAQDVgUHJlu4quQCfeHPoemj+6Jp+
M140lY7DGFyiGfHP7KcxXiJHagbUC5D1IPYARwhh7Rdssy0FsmWQKYl8LXKvstz4
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r0224+GBuwPWmXAobHgPhtClHXYa2ltL1qFFQJETJt0HjhH89jl5HWJl8g3rqccn
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-----END CERTIFICATE-----