05-29-2011
Quote:
Originally Posted by
Corona688
Isn't that what accept is for? select() can indeed wait until an existing socket is ready to send or receive...
I think that Corona has it right. At least that's my understanding.
So the real heart of the question is whether or not a single socket can be used for blocking and sending at the same time. Has anyone attempted this? We are having strange issues when doing it, like seg faults.
10 More Discussions You Might Find Interesting
1. Programming
I have written a socket program in C under RedHat Linux 6.2. This program is using SOCK_STREAM (TCP) to connect to any ip address at port # 23. The program is hosted on the linux machine and works well with Cisco routers. But when I am trying to connect to the same linux machine, it does not return... (4 Replies)
Discussion started by: biswa
4 Replies
2. Programming
Hello everyone. I have a question regarding select() function. Imagine i had passed a fd_set* as the readfds parameter. Can i add some fd to the fd_set, using FD_SET, while the thread is blocked in the select call(obviously from another thread), and will that select call monitor those fd, even if... (2 Replies)
Discussion started by: adadon
2 Replies
3. Shell Programming and Scripting
Hi!
My data file contains a two columns list. It looks like:
1 3.789
2 6.789
3 7.890
4 8.900
5 6.789
6 1.987
7 10.987
8 2.987
9 0.987
I would like to create a new list using the awk command, just selecting data from the second column but also printing the first column.
Let say I select... (3 Replies)
Discussion started by: cris48
3 Replies
4. UNIX for Dummies Questions & Answers
Hi,
I am trying to send email with attacment and body using "mailx"
(cat body.txt; uuencode attach.txt) | mailx -s "Attachment" abc@xyz.com
When i type this command, the shell is still waiting for me to enter something in standard input and press control D before it sends a mail and... (2 Replies)
Discussion started by: aliaszero
2 Replies
5. Homework & Coursework Questions
Write a program using select, which will create some number of child processes that continuously send text messages to the parent process using pipes. Each child has its own pipe that it uses to communicate with the parent. The parent uses select () to decide what pipes should be processed to... (1 Reply)
Discussion started by: ripssingh
1 Replies
6. Shell Programming and Scripting
Hi ,
I want to select data from a file .the datas in a file will be in both upper and lower case. can able to select particular data using awk.
file is like
Ram Selva 24332 UNIXTEAM
Karthi Siva 43322 UNIXTEAM
In read if i enter selva as lowercase its not displaying result. (9 Replies)
Discussion started by: boopal
9 Replies
7. Shell Programming and Scripting
I would like to recover the data from 3 text tags.
These three markers are located between the tags specific location <tag1> and </tag1> knowing that they are in many places.
In File.txt:
<tag2>txt2</tag2>
<tag3>txt3</tag3>
<tag4>txt4</tag4>
....
<tag1>
<tag2>txt2</tag2>... (3 Replies)
Discussion started by: Amad
3 Replies
8. UNIX for Dummies Questions & Answers
Hello all,
Once again I need to call upon the masters for help. I have a file called endpoint_data. IN that file I have groups of endpoints. However all I need from the file is this....
ENDPOINT NAME = SIPWOODSBC
SIG PRI FQDN/IP ADDRESS/DOMAIN NAME = 10.xxx.xxx.xxx
SIG SEC... (4 Replies)
Discussion started by: jay11789
4 Replies
9. IP Networking
Hello All,
I am very new to socket programming and client server architecture. I have to write a client which will send some data to server and server will display it on its console. I am ready with both client and server but my problem is with packetizing of data --
I have... (1 Reply)
Discussion started by: anand.shah
1 Replies
10. Shell Programming and Scripting
I wish to use AWK to do something akin: Select all 2D data with 1<$1<2 and -7.5<$2<-6.5
But it's not working
awk 'END {print ($1<=2&&$1>=1&&$2<=-6.5&&$2>=-7.5)}' bla
Data:
-1.06897 -8.04482 -61.469
-1.13613 -8.04482 -61.2271
-1.00182 -8.04482 -61.2081
-1.06897 -8.13518 -60.8544... (2 Replies)
Discussion started by: chrisjorg
2 Replies
LEARN ABOUT OSF1
shutdown
shutdown(2) System Calls Manual shutdown(2)
NAME
shutdown - Shuts down socket send and receive operations
SYNOPSIS
#include <sys/socket.h>
int shutdown ( int socket, int how );
STANDARDS
Interfaces documented on this reference page conform to industry standards as follows:
shutdown(): XNS5.0
Refer to the standards(5) reference page for more information about industry standards and associated tags.
PARAMETERS
Specifies the file descriptor of the socket. Specifies the type of shutdown. Values are: To disable further receive operations To disable
further send operations To disable further send operations and receive operations
DESCRIPTION
The shutdown() function disables receive and/or send operations on the specified socket.
RETURN VALUES
Upon successful completion, a value of 0 (zero) is returned. Otherwise, a value of -1 is returned and errno is set to indicate the error.
ERRORS
If the shutdown() function fails, errno may be set to one of the following values: The socket parameter is not valid. The how argument is
invalid. Insufficient resources are available in the system to complete the call. The available STREAMS resources were insufficient for
the operation to complete. The socket is not connected. The socket parameter refers to a file, not a socket.
RELATED INFORMATION
Functions: getsockopt(2), read(2), recv(2), recvfrom(2), recvmsg(2), select(2), send(2), sendto(2), setsockopt(2), socket(2), write(2)
Standards: standards(5) delim off
shutdown(2)