On Sat, Jan 09, 2021 at 08:25:46PM +0300, Vasily Postnicov wrote: > Brilliant! It took me almost a day to dive into ZeroMQ to reassure > myself that there is nothing wrong with it. When I tried to write > minimal test programs which call fork after pthread_create() in all > combinations. When I realized that NSS stub module is what I need. > > Instructions: > > 1) Compile NSS stub module: cc -shared -fPIC -pthread -o > nss_zerodns.so.1 test.c (Note '.1' at the end). > 2) Copy nss_zerodns.so.1 to /usr/local/lib > 3) Apply the patch src_sbin_ping_main.c to ping source code. With this > patch ping will not quit too early when the initial call to > getaddrinfo() fails. > 4) Add stub module to /etc/nsswitch.conf: edit 'hosts' line to be > 'hosts: files dns zerodns' > 5) Ping non-existent host, like 'ping foo.bar' > 6) Ping will hang. The child process which it creates cannot be killed > even with killall -9 ping
This is exactly what I do not want. Provide a standalone binary (or binaries) that can be just run and demonstrate the issue. Without editing nsswitch.conf or patching ping. _______________________________________________ freebsd-net@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
