Hello,
why doesn't write() return EPIPE ?
If the peer has closed its socket connection the second write to this
socket should return -1 and errno should be set to EPIPE (if SIGPIPE is
set
to be ignored). Why does the second write to the socket never go into
the
error detection?
with best regards,
Oliver
(writen() is a member function of my socket C++-class)
ssize_t
sock::writen( const void * vptr, size_t n)
{
size_t nleft;
ssize_t nwritten;
const char *ptr;
ptr = static_cast< char * >( vptr);
nleft = n;
struct sigaction new_sa;
struct sigaction old_sa;
new_sa.sa_handler = SIG_IGN;
::sigemptyset( & new_sa.sa_mask);
new_sa.sa_flags = 0;
::sigaction( SIGPIPE, & new_sa, & old_sa);
while ( nleft > 0)
{
if ( ( nwritten = ::write( m_handle, ptr, nleft) ) <=
0)
{
if ( errno == EINTR)
nwritten = 0; /* and call write() again
*/
else if ( errno == EPIPE)
return EOF; /* write to socket with no
readers */
else
throw net_io_ex( ::strerror( errno),
"writen()", __FILE__); /* error */
}
nleft -= nwritten;
ptr += nwritten;
}
/* set to its previous action */
::sigaction( SIGPIPE, & old_sa, 0);
return n;
}
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