I want to make a chat script based on SOCKET.It listen() to
a port and when a user come it accept() it and builds a
NEW_SOCKET contacting with the user(print the web page).
The parent process fork() a child process that will print to
the NEW_SOCKETand use pipe() talk to the child.
The child section looks like:
############
$connect=0;
$readpipe="READ$connect";
$writepipe="WRITE$connect";
pipe($readpipe,$writepipe);
$writepipe->autoflush();
my $pid;
if (!($pid=fork))
{
close $writepipe;
$readpipe->autoflush;
select(NEW_SOCKET);
while(1) {
my $words;
my $rbits='';
vec($rbits,fileno($readpipe),1)=1;
select($rbits,undef,undef,undef);
$words=<$readpipe>;
print "<br>$words"; }
close NEW_SOCKET;
exit;
}
$connect++;
close $readpipe;
$writepipe->autoflush();
$pipes{$pid}=$writepipe;
###############
First it worked well lasting for 3 or 4 minutes.But suddenly
it was out of control.I think "select($rbits,undef,undef,undef);"
statement lose his effect and he didn't like to wait for the
filehandle become ready any more.The child print
innumerable "
" to user's browser Madly and Continually!
Now I am stranded.Can you give me a lesson?Thank you.
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
Read Where should I post X? if you're not absolutely sure you're posting in the right place.
Please read these before you post! —
Posts may use any of the Perl Monks Approved HTML tags:
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
| |
For: |
|
Use: |
| & | | & |
| < | | < |
| > | | > |
| [ | | [ |
| ] | | ] |
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.