So we're not "disallowing" a backlog argument of zero to
listen(). We'll accept that just fine, the only thing that
happens is that you'll get what you ask for, that being
no connections :-)
I'm not sure where HP-UX inherited the 0 = 1 bit - perhaps from BSD, nor
am I sure there is official chapter and verse, but:
<excerpt>
backlog is limited to the range of 0 to SOMAXCONN, which is defined in
<sys/socket.h>. SOMAXCONN is currently set to 4096. If any other
value is specified, the system automatically assigns the closest value
within the range. A backlog of 0 specifies only 1 pending
connection is allowed at any given time.
</excerpt>
I don't have a Solaris, BSD or AIX manpage for listen handy to check
them but would not be surprised to see they are similar.
rick jones
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