Why does this simple Perl client not work?
I am using IPC with sockets.
I'm trying to understand why I cannot get this example script from perldoc perlipc to run on my Ubuntu setup:
#!/usr/bin/perl -w
use IO::Socket;
$remote = IO::Socket::INET->new(
Proto => "tcp",
PeerAddr => "localhost",
PeerPort => "daytime(13)",
)
|| die "can't connect to daytime service on localhost";
while (<$remote>) { print }
The script dies because the TCP client cannot be established.
Running $ less /etc/services shows me that daytime(13) is defined. What could be wrong here?
perl tcp socket
edited Jan 6 at 21:28
Rui F Ribeiro
39.5k1479132
asked Jul 27 '12 at 21:05
ZaidZaid
3,729113033
add a comment |
I am using IPC with sockets.
I'm trying to understand why I cannot get this example script from perldoc perlipc to run on my Ubuntu setup:
#!/usr/bin/perl -w
use IO::Socket;
$remote = IO::Socket::INET->new(
Proto => "tcp",
PeerAddr => "localhost",
PeerPort => "daytime(13)",
)
|| die "can't connect to daytime service on localhost";
while (<$remote>) { print }
The script dies because the TCP client cannot be established.
Running $ less /etc/services shows me that daytime(13) is defined. What could be wrong here?
perl tcp socket
edited Jan 6 at 21:28
Rui F Ribeiro
39.5k1479132
asked Jul 27 '12 at 21:05
ZaidZaid
3,729113033
1
Renan's answer is correct. The example was added to the perl documentation in 1997, when the mood on the Internet was "services are cool! Let's run all of them!" and has only received minor cosmetic updates since then. It would be hard to write a modern version; there just aren't any universally available TCP ports with dead-simple protocols like "daytime" on them any more.
– Alan Curry
Jul 28 '12 at 1:47
What's your linux distribution ? If you don't have this service listening on localhost, how could you possibly connect to it.
– daisy
Sep 13 '12 at 1:49
add a comment |
I am using IPC with sockets.
I'm trying to understand why I cannot get this example script from perldoc perlipc to run on my Ubuntu setup:
#!/usr/bin/perl -w
use IO::Socket;
$remote = IO::Socket::INET->new(
Proto => "tcp",
PeerAddr => "localhost",
PeerPort => "daytime(13)",
)
|| die "can't connect to daytime service on localhost";
while (<$remote>) { print }
The script dies because the TCP client cannot be established.
Running $ less /etc/services shows me that daytime(13) is defined. What could be wrong here?
perl tcp socket
edited Jan 6 at 21:28
Rui F Ribeiro
39.5k1479132
asked Jul 27 '12 at 21:05
ZaidZaid
3,729113033
I am using IPC with sockets.
I'm trying to understand why I cannot get this example script from perldoc perlipc to run on my Ubuntu setup:
#!/usr/bin/perl -w
use IO::Socket;
$remote = IO::Socket::INET->new(
Proto => "tcp",
PeerAddr => "localhost",
PeerPort => "daytime(13)",
)
|| die "can't connect to daytime service on localhost";
while (<$remote>) { print }
The script dies because the TCP client cannot be established.
Running $ less /etc/services shows me that daytime(13) is defined. What could be wrong here?
perl tcp socket
perl tcp socket
edited Jan 6 at 21:28
Rui F Ribeiro
39.5k1479132
asked Jul 27 '12 at 21:05
ZaidZaid
3,729113033
edited Jan 6 at 21:28
Rui F Ribeiro
39.5k1479132
asked Jul 27 '12 at 21:05
ZaidZaid
3,729113033
edited Jan 6 at 21:28
Rui F Ribeiro
39.5k1479132
edited Jan 6 at 21:28
Rui F Ribeiro
39.5k1479132
edited Jan 6 at 21:28
Rui F Ribeiro
39.5k1479132
39.5k1479132
asked Jul 27 '12 at 21:05
ZaidZaid
3,729113033
asked Jul 27 '12 at 21:05
ZaidZaid
3,729113033
asked Jul 27 '12 at 21:05
ZaidZaid
3,729113033
3,729113033
1
Renan's answer is correct. The example was added to the perl documentation in 1997, when the mood on the Internet was "services are cool! Let's run all of them!" and has only received minor cosmetic updates since then. It would be hard to write a modern version; there just aren't any universally available TCP ports with dead-simple protocols like "daytime" on them any more.
– Alan Curry
Jul 28 '12 at 1:47
What's your linux distribution ? If you don't have this service listening on localhost, how could you possibly connect to it.
– daisy
Sep 13 '12 at 1:49
add a comment |
1
Renan's answer is correct. The example was added to the perl documentation in 1997, when the mood on the Internet was "services are cool! Let's run all of them!" and has only received minor cosmetic updates since then. It would be hard to write a modern version; there just aren't any universally available TCP ports with dead-simple protocols like "daytime" on them any more.
– Alan Curry
Jul 28 '12 at 1:47
What's your linux distribution ? If you don't have this service listening on localhost, how could you possibly connect to it.
– daisy
Sep 13 '12 at 1:49
1
1
Renan's answer is correct. The example was added to the perl documentation in 1997, when the mood on the Internet was "services are cool! Let's run all of them!" and has only received minor cosmetic updates since then. It would be hard to write a modern version; there just aren't any universally available TCP ports with dead-simple protocols like "daytime" on them any more.
– Alan Curry
Jul 28 '12 at 1:47
Renan's answer is correct. The example was added to the perl documentation in 1997, when the mood on the Internet was "services are cool! Let's run all of them!" and has only received minor cosmetic updates since then. It would be hard to write a modern version; there just aren't any universally available TCP ports with dead-simple protocols like "daytime" on them any more.
– Alan Curry
Jul 28 '12 at 1:47
What's your linux distribution ? If you don't have this service listening on localhost, how could you possibly connect to it.
– daisy
Sep 13 '12 at 1:49
What's your linux distribution ? If you don't have this service listening on localhost, how could you possibly connect to it.
– daisy
Sep 13 '12 at 1:49
add a comment |
1 Answer
1
active
oldest
votes
Are you running anything that provides a daytime service? From Wikipedia:
On UNIX-like operating systems a daytime server is usually built into the inetd (or xinetd) daemon. The service is usually not enabled by default. It may be enabled by adding the following lines to the file /etc/inetd.conf and telling inetd to reload its configuration.
daytime stream tcp nowait root internal
daytime dgram udp wait root internal
Thus you have to enable daytime service in the inetd.conf.
answered Jul 27 '12 at 21:22
RenanRenan
14.4k65377
I don't seem to have x?inetd.conf under /etc. Is there an alternative way to do this?
– Zaid
Jul 28 '12 at 7:36
add a comment |
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1 Answer
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1 Answer
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active
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active
oldest
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active
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votes
Are you running anything that provides a daytime service? From Wikipedia:
On UNIX-like operating systems a daytime server is usually built into the inetd (or xinetd) daemon. The service is usually not enabled by default. It may be enabled by adding the following lines to the file /etc/inetd.conf and telling inetd to reload its configuration.
daytime stream tcp nowait root internal
daytime dgram udp wait root internal
Thus you have to enable daytime service in the inetd.conf.
answered Jul 27 '12 at 21:22
RenanRenan
14.4k65377
I don't seem to have x?inetd.conf under /etc. Is there an alternative way to do this?
– Zaid
Jul 28 '12 at 7:36
add a comment |
Are you running anything that provides a daytime service? From Wikipedia:
On UNIX-like operating systems a daytime server is usually built into the inetd (or xinetd) daemon. The service is usually not enabled by default. It may be enabled by adding the following lines to the file /etc/inetd.conf and telling inetd to reload its configuration.
daytime stream tcp nowait root internal
daytime dgram udp wait root internal
Thus you have to enable daytime service in the inetd.conf.
answered Jul 27 '12 at 21:22
RenanRenan
14.4k65377
I don't seem to have x?inetd.conf under /etc. Is there an alternative way to do this?
– Zaid
Jul 28 '12 at 7:36
add a comment |
Are you running anything that provides a daytime service? From Wikipedia:
On UNIX-like operating systems a daytime server is usually built into the inetd (or xinetd) daemon. The service is usually not enabled by default. It may be enabled by adding the following lines to the file /etc/inetd.conf and telling inetd to reload its configuration.
daytime stream tcp nowait root internal
daytime dgram udp wait root internal
Thus you have to enable daytime service in the inetd.conf.
answered Jul 27 '12 at 21:22
RenanRenan
14.4k65377
Are you running anything that provides a daytime service? From Wikipedia:
On UNIX-like operating systems a daytime server is usually built into the inetd (or xinetd) daemon. The service is usually not enabled by default. It may be enabled by adding the following lines to the file /etc/inetd.conf and telling inetd to reload its configuration.
daytime stream tcp nowait root internal
daytime dgram udp wait root internal
Thus you have to enable daytime service in the inetd.conf.
answered Jul 27 '12 at 21:22
RenanRenan
14.4k65377
answered Jul 27 '12 at 21:22
RenanRenan
14.4k65377
answered Jul 27 '12 at 21:22
RenanRenan
14.4k65377
answered Jul 27 '12 at 21:22
RenanRenan
14.4k65377
14.4k65377
I don't seem to have x?inetd.conf under /etc. Is there an alternative way to do this?
– Zaid
Jul 28 '12 at 7:36
add a comment |
I don't seem to have x?inetd.conf under /etc. Is there an alternative way to do this?
– Zaid
Jul 28 '12 at 7:36
I don't seem to have x?inetd.conf under /etc. Is there an alternative way to do this?
– Zaid
Jul 28 '12 at 7:36
I don't seem to have x?inetd.conf under /etc. Is there an alternative way to do this?
– Zaid
Jul 28 '12 at 7:36
add a comment |
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1
Renan's answer is correct. The example was added to the perl documentation in 1997, when the mood on the Internet was "services are cool! Let's run all of them!" and has only received minor cosmetic updates since then. It would be hard to write a modern version; there just aren't any universally available TCP ports with dead-simple protocols like "daytime" on them any more.
– Alan Curry
Jul 28 '12 at 1:47
What's your linux distribution ? If you don't have this service listening on localhost, how could you possibly connect to it.
– daisy
Sep 13 '12 at 1:49