[ksh93-integration-discuss] Re: [perf-discuss] Can |recv()| be used on a pipe in Solaris ?

[Glenn Fowler]

On Tue, 05 Sep 2006 14:46:46 -0700 Alexander Kolbasov wrote:
>      The recv(), recvfrom(), and recvmsg() functions are used  to
>      receive  messages  from  another  socket.   The  s socket is
>      created with socket(3SOCKET).

> The pipe is not a socket in Solaris.

thanks 

but that doesn't answer the question "does recv() work on pipes in solaris?"
there are some systems with pipe!=socket with similar documentation
for which recv() works on pipes

for solaris ioctl(I_PEEK) works on pipes, and the libast iffe scripts
prefer I_PEEK, so recv() behavior doesn't matter (on solaris)

a general note: this is a big hole in the official and de-facto standards
there is no consistent (across implementations) way to peek on a pipe, and
thus no efficient way to read exactly one line from a pipe -- what is
needed is a call that peeks on any fd open for reading

-- Glenn Fowler -- AT&T Research, Florham Park NJ --