09-17-2012
It's not possible to send a file without opening it. Something, somewhere, must call the system call open() to access the file.
10 More Discussions You Might Find Interesting
1. Programming
Dear Reader,
Is there any way to check up socket status other than 'netstatus '
Thanks in advance, (1 Reply)
Discussion started by: joseph_shibu
1 Replies
2. Programming
Hello,
I actually try to make client-server program.
I'm using SCO OpenServer Release 5.0.0 and when I try to compile my code (by TELNET) I've got this error :
I'm just using this simple code :
and I get the same error if I use :
If someone can help me,
Thanks (2 Replies)
Discussion started by: soshell
2 Replies
3. IP Networking
my system is a stand alone system... i want to try doing socket porgramming..ihave heard that this is usually done during testing...
how can i do that....? (6 Replies)
Discussion started by: damn_bkb
6 Replies
4. IP Networking
Hello Everyone
Iam working on tcp/ip programming.with some time interval server has to send data.client has to close the connection and to open the connection between the time interval.this is the scenario
when iam closing the connection in client side the connection terminates.how to... (1 Reply)
Discussion started by: sureshvaikuntam
1 Replies
5. Shell Programming and Scripting
hi
i want to write simple socket program which will listen on socket . here is the code
## read msg on socket
#! /usr/bin/perl
use IO::Socket::INET;
my $MySocket= IO::Socket::INET->new(LocalPort=>1234,
Proto=>'udp') ;
while ()... (2 Replies)
Discussion started by: zedex
2 Replies
6. UNIX for Advanced & Expert Users
Hi,
I am trying to connect to more than 60 servers to perform some actions remotely. for this I am using ssh2. But its taking lot of time.
Though i am running the command in background, still its taking long time to execute..
Any one let me know can we use sockets instead of ssh2 for... (3 Replies)
Discussion started by: pvamsikr
3 Replies
7. UNIX for Advanced & Expert Users
can we send udp message to a destination ip address .. without having an ip address configured in our machine using recvfrom ? (2 Replies)
Discussion started by: Gopi Krishna P
2 Replies
8. UNIX for Dummies Questions & Answers
in c socket programming, how can I send and received on the same port? (7 Replies)
Discussion started by: Peevish
7 Replies
9. UNIX for Dummies Questions & Answers
in socket programming how can i : Create for example 3 blank files, namely: server, client, network
•Server: act as servers/provider, will receive all requests from different client
•Client: requesters
•Network: middle-layer of communication between server & client
any tips or... (6 Replies)
Discussion started by: kedah160
6 Replies
10. Programming
Hi everyone,
I'm new to this forum. I'm working on new project for last few days and this forum already helped me on
couple of occasions. I don't have any prior experience with network programming so I'll appreciate any advise given.
I'm trying to do the following:
1. open user... (2 Replies)
Discussion started by: _thomas
2 Replies
FIFO(4) Linux Programmer's Manual FIFO(4)
NAME
fifo - first-in first-out special file, named pipe
DESCRIPTION
A FIFO special file (a named pipe) is similar to a pipe, except that it is accessed as part of the file system. It can be opened by multi-
ple processes for reading or writing. When processes are exchanging data via the FIFO, the kernel passes all data internally without writ-
ing it to the file system. Thus, the FIFO special file has no contents on the file system, the file system entry merely serves as a refer-
ence point so that processes can access the pipe using a name in the file system.
The kernel maintains exactly one pipe object for each FIFO special file that is opened by at least one process. The FIFO must be opened on
both ends (reading and writing) before data can be passed. Normally, opening the FIFO blocks until the other end is opened also.
A process can open a FIFO in non-blocking mode. In this case, opening for read only will succeed even if noone has opened on the write side
yet; opening for write only will fail with ENXIO (no such device or address) unless the other end has already been opened.
Under Linux, opening a FIFO for read and write will succeed both in blocking and non-blocking mode. POSIX leaves this behaviour undefined.
This can be used to open a FIFO for writing while there are no readers available. A process that uses both ends of the connection in order
to communicate with itself should be very careful to avoid deadlocks.
NOTES
When a process tries to write to a FIFO that is not opened for read on the other side, the process is sent a SIGPIPE signal.
FIFO special files can be created by mkfifo(3), and are specially indicated in ls -l.
SEE ALSO
mkfifo(3), mkfifo(1), pipe(2), socketpair(2), open(2), signal(2), sigaction(2)
Linux Man Page 1999-06-20 FIFO(4)