PrzemeK <sou...@o2.pl> added the comment:
Yep, it was 3.4 then... but I think problem still exists
tl;dr: For abstract sockets (only?) filling struct with zeros is
meaningful.
long:
* Python (cli) -> Python (srv) = works
* C (cli) -> C (srv) = works
* C (cli) -> Python (srv) = does NOT work
* Python (cli) -> C (srv) = does NOT work (strace dumps below)
$ gcc --version
gcc (Ubuntu 7.4.0-1ubuntu1~18.04) 7.4.0
$ uname -a
Linux ajzus 4.15.0-48-generic #51-Ubuntu SMP Wed Apr 3 08:28:49 UTC 2019 x86_64
x86_64 x86_64 GNU/Linux
$ python3.7 --version
Python 3.7.1
// 1st console
$ gcc -g -Wall -Wextra -pedantic -o abs_srv abs_srv.c
$ strace ./abs_srv
...
socket(AF_UNIX, SOCK_STREAM, 0) = 3
bind(3, {sa_family=AF_UNIX,
sun_path=@"/var/tmp/sock.tmp\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"},
110) = 0
listen(3, 5) = 0
accept(3, NULL, NULL
// waiting
// 2nd console
$ ls /var/tmp/*.sock
ls: cannot access '/var/tmp/*.sock': No such file or directory
$ strace python3.7 abs_cli.py
...
socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0) = 3
connect(3, {sa_family=AF_UNIX, sun_path=@"/var/tmp/sock.tmp"}, 20) = -1
ECONNREFUSED (Connection refused)
----------
versions: +Python 3.7
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<https://bugs.python.org/issue25541>
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