04-01-2011
Quote:
How does the select function code work? will it achieve a better result than what you proposed?
It essentially keeps a list of file descriptors and lets you know when any of them are ready. Whether it's "better" depends on what you want to do.
Quote:
this is what i have, are there any errors?
How should I know?
Post your complete program!
10 More Discussions You Might Find Interesting
1. Programming
Hi !
I had a verry simple question to ask...
In unix when we create pipes.. the unnamed pipes that is...
is there any way to access those pipes outside the code ?
Another thing.. do sockets have an entry in the inode table ?
TIA,
Devyani. (1 Reply)
Discussion started by: devy8
1 Replies
2. Programming
I am looking for a way to have a program listen on a port (example: 8000) for communication I will be sending via that port to it(Linux Kernel machine). Once it recieves an appropiate command I need it to run a .bat file in linux.
I know what I need to do but I am running into a few problems:... (8 Replies)
Discussion started by: bigB8210
8 Replies
3. Programming
Hai,
How cani declare socket and collect the data in a string varialbe.
Since i am new to this i am asking this.
Can we connect multiple port.
Thank you. (6 Replies)
Discussion started by: arunkumar_mca
6 Replies
4. UNIX for Dummies Questions & Answers
how do i mointor how many sockets are opened from a particular foriegn address? (2 Replies)
Discussion started by: kirpond
2 Replies
5. Solaris
Is there a way to see what sockets are in use? The developers here are getting some defunct processes and they would like to get a socket list.
This is on a Solaris 8 machine.
Thanks! (1 Reply)
Discussion started by: kjbaumann
1 Replies
6. IP Networking
Is it possible to trace the packages and the statuses of client's and/or server's sockets by the UNIX network administrative tools?
Two applications interact via sockets. There is no problem if they stay in the same network segment. If their hosts connected through the firewall then they aren't... (4 Replies)
Discussion started by: gogogo
4 Replies
7. Programming
anyone and teach me how to save standard output to a file in a client/server socket. I know how to read them to the screen but i'm not quite sure how to save them to a file.
my read to screen file code:
memset(line, 0x0, LINE_ARRAY_SIZE);
while (recv(connectSocket, line, MAX_MSG, 0) >... (1 Reply)
Discussion started by: crunchyuser
1 Replies
8. Programming
Hi,i now moved into a different section where i need to use sockets.
i am completely nill in sockets.
can some body please provide me what are the requirements for a socket.
to use sockets in c.
thanks (1 Reply)
Discussion started by: MrUser
1 Replies
9. Red Hat
hai guys,
I'm doing a project in which one server communicates with several clients. How can i do it when i have different port numbers???:confused: (0 Replies)
Discussion started by: rajeshb6
0 Replies
10. Programming
Hi, i am student, think learning about c++, someone has a example the how establish a conection with sockets :b::b: (1 Reply)
Discussion started by: mmartinez
1 Replies
LEARN ABOUT DEBIAN
shell-quote
SHELL-QUOTE(1p) User Contributed Perl Documentation SHELL-QUOTE(1p)
NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$SHELL -c". This doesn't work as intended:
ssh host touch 'hi there' # fails
It creates 2 files, hi and there. Instead, do this:
cmd=`shell-quote touch 'hi there'`
ssh host "$cmd"
This gives you just 1 file, hi there.
process find output
It's not ordinarily possible to process an arbitrary list of files output by find with a shell script. Anything you put in $IFS to
split up the output could legitimately be in a file's name. Here's how you can do it using shell-quote:
eval set -- `find -type f -print0 | xargs -0 shell-quote --`
debug shell scripts
shell-quote is better than echo for debugging shell scripts.
debug() {
[ -z "$debug" ] || shell-quote "debug:" "$@"
}
With echo you can't tell the difference between "debug 'foo bar'" and "debug foo bar", but with shell-quote you can.
save a command for later
shell-quote can be used to build up a shell command to run later. Say you want the user to be able to give you switches for a command
you're going to run. If you don't want the switches to be re-evaluated by the shell (which is usually a good idea, else there are
things the user can't pass through), you can do something like this:
user_switches=
while [ $# != 0 ]
do
case x$1 in
x--pass-through)
[ $# -gt 1 ] || die "need an argument for $1"
user_switches="$user_switches "`shell-quote -- "$2"`
shift;;
# process other switches
esac
shift
done
# later
eval "shell-quote some-command $user_switches my args"
OPTIONS
--debug
Turn debugging on.
--help
Show the usage message and die.
--version
Show the version number and exit.
AVAILABILITY
The code is licensed under the GNU GPL. Check http://www.argon.org/~roderick/ or CPAN for updated versions.
AUTHOR
Roderick Schertler <roderick@argon.org>
perl v5.8.4 2005-05-03 SHELL-QUOTE(1p)