CVS commit: src/usr.bin/ftp

["Luke Mewburn" <lukem%netbsd.org@localhost>]

Module Name:    src
Committed By:   lukem
Date:           Thu Jun  3 10:11:00 UTC 2021

Modified Files:
        src/usr.bin/ftp: ftp.c

Log Message:
set SO_KEEPALIVE on control connection

Attempt to prevent timeouts of the control connection by setting SO_KEEPALIVE.
This matches the equivalent behaviour in ftpd.

Note: This is a much simpler change than adding a background polling event
to invoke "STAT" (or "NOOP") on the control connection during a transfer.
(It's unclear from RFC 959 whether "NOOP" is even permitted during a transfer).

PR bin/56129


To generate a diff of this commit:
cvs rdiff -u -r1.171 -r1.172 src/usr.bin/ftp/ftp.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.