redirect variable to same program at next loop

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Seeing input that you redirect to a program on the shell

Suppose I have a program that I've written that accepts input, ie this C++ program: #include <iostream> using namespace std; int main() { cout << "Enter something:" << endl; int x; cin >> x; cout << "You entered data" << endl; } Suppose that I have a text file,...

2. Shell Programming and Scripting

Redirect output of command line to for loop

I would like to redirect output of command line in for loop as $line. Output should be processed as line but instead it throw whole output. Could somebody help me on how to redirect output of command line and process it line by line without sending output to any file. below is my code ...

3. Shell Programming and Scripting

redirect frintf to a variable

how to redirect printf to a variable

4. Shell Programming and Scripting

loop logic inside of an inline redirect?

i need to log the feedback from the ftp server as i'm performing some deletes. the only way i know of to do this is with the inline redirect << EOF ... but from there to the closing EOF, it's like i'm at the ftp command prompt, so I don't know how to have ksh script logic in there I have an...

5. Shell Programming and Scripting

after grep i want to redirect it to some variable

for the below grep -i $1 "${logdir}"* | grep -i adding | grep -iv equation | tail -1 | cut -d ':' -f 1 the result of the grep i want to redirect into some variable, i tried to do veri=grep -i $1 "${logdir}"* | grep -i adding | grep -iv equation | tail -1 | cut -d ':' -f 1 but it is...

6. UNIX for Dummies Questions & Answers

Redirect to variable

how do you redirect stdout into a variable. whenever I try I get an ambiguous redirect error :( I am trying to validate some user input and failing miserably. cal $MONTH $YEAR | grep -c "$DAY" if the above is 1 then it is valid if 0 then not valid. I have been trying to redirect the output...

7. Shell Programming and Scripting

redirect exception messages from program

Hi, I have a script which invoke a java program and I would like to know whether it is possible to log the exception thrown by the program to a log file in the script? Thanks!

8. UNIX for Dummies Questions & Answers

Redirect Output In Variable

how make assign the output of the command (for example: grep "file" "string" ) in a variable ($name)? i thing how put the result of the command (grep , cut, find ecc) in a variable.. IT's Possible ??

9. Shell Programming and Scripting

please help: how to redirect input into a variable

I'm trying to write a simple script program (C shell). I have a problem redirecting input into a variable. Say I have a variable called J, and there is file called result which contains just some number, say 5. Which command should I use to assign J value 5 from the file result. I tried the...

LEARN ABOUT OSX

tc-mirred

Mirror/redirect action in tc(8) 				       Linux					   Mirror/redirect action in tc(8)

NAME

       mirred - mirror/redirect action

SYNOPSIS

       tc ... action mirred DIRECTION ACTION [ index INDEX ] dev DEVICENAME

       DIRECTION := { ingress | egress }

       ACTION := { mirror | redirect }

DESCRIPTION

       The  mirred  action  allows  packet  mirroring  (copying)  or redirecting (stealing) the packet it receives. Mirroring is what is sometimes
       referred to as Switch Port Analyzer (SPAN) and is commonly used to analyze and/or debug flows.

OPTIONS

       ingress
       egress Specify the direction in which the packet shall appear on the destination interface.

       mirror
       redirect
	      Define whether the packet should be copied (mirror) or moved (redirect) to the destination interface.

       index INDEX
	      Assign a unique ID to this action instead of letting the kernel choose one automatically.  INDEX is a 32bit unsigned integer greater
	      than zero.

       dev DEVICENAME
	      Specify the network interface to redirect or mirror to.

EXAMPLES

       Limit ingress bandwidth on eth0 to 1mbit/s, redirect exceeding traffic to lo for debugging purposes:

	      # tc qdisc add dev eth0 handle ffff: ingress
	      # tc filter add dev eth0 parent ffff: u32 
		   match u32 0 0 
		   action police rate 1mbit burst 100k conform-exceed pipe 
		   action mirred egress redirect dev lo

       Mirror all incoming ICMP packets on eth0 to a dummy interface for examination with e.g. tcpdump:

	      # ip link add dummy0 type dummy
	      # ip link set dummy0 up
	      # tc qdisc add dev eth0 handle ffff: ingress
	      # tc filter add dev eth0 parent ffff: protocol ip 
		   u32 match ip protocol 1 0xff 
		   action mirred egress mirror dev dummy0

       Using an ifb interface, it is possible to send ingress traffic through an instance of sfq:

	      # modprobe ifb
	      # ip link set ifb0 up
	      # tc qdisc add dev ifb0 root sfq
	      # tc qdisc add dev eth0 handle ffff: ingress
	      # tc filter add dev eth0 parent ffff: u32 
		   match u32 0 0 
		   action mirred egress redirect dev ifb0

SEE ALSO

       tc(8), tc-u32(8)

iproute2							    11 Jan 2015 				   Mirror/redirect action in tc(8)

Shell Programming and Scripting