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Shell Programming and Scripting
redirect STDIN
Post 302101653 by prkfriryce on Wednesday 3rd of January 2007 03:53:48 PM
01-03-2007
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10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
My supervisor keep getting "stdin not tty" or something like that when he pipe or redirect input into a program. Others
don't seem to get this message. Is there some way I can help him to fix or turn this off?
Thx in advance (1 Reply)
Discussion started by: Micz
1 Replies
2. Programming
Hi,
Program A: uses pipe()
I am able to read the stdout of PROGAM B (stdout got through system() command) into PROGRAM A using:
* child
-> dup2(fd, STDOUT_FILENO);
-> execl("/path/PROGRAM B", "PROGRAM B", NULL);
* parent
-> char line;
-> read(fd, line, 100);
Question:
---------... (1 Reply)
Discussion started by: vvaidyan
1 Replies
3. UNIX for Dummies Questions & Answers
Hi,
Program A: uses pipe()
I am able to read the stdout of PROGAM B (stdout got through system() command) into PROGRAM A using:
* child
-> dup2(fd, STDOUT_FILENO);
-> execl("/path/PROGRAM B", "PROGRAM B", NULL);
* parent
-> char line;
-> read(fd, line, 100);
Question:
---------... (3 Replies)
Discussion started by: vvaidyan
3 Replies
4. Programming
For windows was pretty simple to redirect the std in a and out of a
child process for "cmd.exe " command prompt terminal to a socket using connected pipes passed to a new process in the STARTUPINFO structure.
BOOL b = ::CreatePipe((LPHANDLE)h_stdInRead,(LPHANDLE)hsdtInWriteTmp, &SecAttrib,... (1 Reply)
Discussion started by: gyula
1 Replies
5. Shell Programming and Scripting
Hi:
I have the next script on ksh
#!/usr/bin/ksh
cd $FUENTES
qdesign <<-!
\$/opt/cognos/ph843e/bin/qtp <<-!
\$/opt/cognos/ph843e/bin/quiz <<-!
!
!
!
This script is very simple, i want to nest three process quiz into qtp, and this into qdesign.
When I run it , i receive the... (5 Replies)
Discussion started by: ct2marer
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6. UNIX for Advanced & Expert Users
Hi:
I have the next script on ksh
#!/usr/bin/ksh
cd $FUENTES
qdesign <<-!
\$/opt/cognos/ph843e/bin/qtp <<-!
\$/opt/cognos/ph843e/bin/quiz <<-!
!
!
!
This script is very simple, i want to nest three process quiz into qtp, and this into qdesign.
When I run it , i receive the next... (2 Replies)
Discussion started by: ct2marer
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7. Shell Programming and Scripting
I am unable to use STDIn redirection with < (commands)
When I do the following, both approaches work and give the same results:
1.
$ printf "aaa\nbbb\n" > file1
$ printf "111\n222\n" > file2
$ cat file1 file2
aaa
bbb
111
2222.
$ cat <(printf "aaa\nbbb\n") <(printf "111\n222\n")
aaa... (8 Replies)
Discussion started by: metaltree
8 Replies
8. UNIX for Dummies Questions & Answers
Hi,
i know how to
a) redirect stdout and stderr to one file,
b) and write to two files concurrently with same output using tee command
Now, i want to do both the above together.
I have a script and it should write both stdout and stderr in one file and also write the same content to... (8 Replies)
Discussion started by: ysrini
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9. Shell Programming and Scripting
Looking for the proper way to bring a string into the stdin. I have a string that I would like to grep and awk. Each have to be run separately, not piped together. So far, the only way I could figure out how is to echo the string and pipe it:
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10. Shell Programming and Scripting
Hi there,
I need to execute a command in the bash. The program prints some standard (output and) error and then wants the user to choose one of several options and type the according input. I am trying to solve this issue in a bash script but also running into some circular dependency. How can I... (7 Replies)
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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)