Sponsored Content
Top Forums Shell Programming and Scripting Question about IO redirection Post 302479081 by stevenswj on Thursday 9th of December 2010 06:46:00 PM
Old 12-09-2010
Question about IO redirection

for shell operators like <, >, <<, and >> do the LHS always have to be a process or device and the RHS a file or device?

Is it possible for the RHS to be a process?
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

question on redirection (<<)

I came across the following problem, where file contents are overwritten using redirection. Can somebody please explain what cat << BAR seems to be doing and say why this is a problem? Explain the contents and relation between the two filenames used before the cat command. thanks /tmp# echo... (2 Replies)
Discussion started by: newkidintown
2 Replies

2. Shell Programming and Scripting

input redirection question

Hi, in my script I need to execute the following command: query $id 456 432 but it waits for a RETURN character from keyboard and therefore, it fails. I tried something like: query $id 456 432 << '\n' but, i'ts clear it is not correct. Is there any way to do this? Thxs. (0 Replies)
Discussion started by: luistid
0 Replies

3. Shell Programming and Scripting

File redirection question

Hi all, I am working with the Grinder tool (unrelated to my question) to redirect the output of a program to a file as follows: java -cp $CLASSPATH net.grinder.TCPProxy > grinder.txt This is a proxy server which pipes output to a file. When I do something on my proxy, more and more goes to... (1 Reply)
Discussion started by: Annorax
1 Replies

4. Shell Programming and Scripting

BASH Problem / Question regarding redirection

Hi all, Maybe someone is able to help: Need to redirect the output of a command in realtime to a second command. Command-A executes a remote shell to another host, and outputs its results. Command-B displays a "dialog" with the outputs of Command-A. Command-A Output: Updating FileA... (2 Replies)
Discussion started by: mharald
2 Replies

5. Shell Programming and Scripting

Redirection Question

I just wondered if I'm understanding this command line correctly cat 2>save1 0<memo | sort 2>save2 1>letter This means that stdin will read from memo and if there is an error then stderr will write to save1. Am I correct in saying that the sort command will sort the memo file and write... (2 Replies)
Discussion started by: snag49ers
2 Replies

6. Shell Programming and Scripting

Redirection question

I want to redirect stderr and have the following peice of code $ cat t1.ksh #!/bin/ksh func2() { diff /tmp/jdlkwjdlkejew /tmp/djlkwejdlewdjew >$OUTPUT_FILE 2>>$ERR_FILE } func1() { let counter=0 while do print -u2 "Error: In main function" func2 let... (1 Reply)
Discussion started by: BeefStu
1 Replies

7. Shell Programming and Scripting

Error redirection question

Hi gurus, I have a question, need some of your inputs... I have a command like this : export LINE_COUNT=`wc -l test.dat | awk '{print $1}'` echo $LINE_COUNT --- > gives me 2 which is fine as the file has 2 lines. This works fine if the file test.dat is present but in case... (3 Replies)
Discussion started by: calredd
3 Replies

8. Shell Programming and Scripting

output redirection to existing file question

So I have a existing file that I used the uniq command on and I need to save the output to the same file without changing the file name. I have tried $ uniq filename > filename then when I cat the file it then becomes blank like there is nothing inside. any help would be much appreciated... (0 Replies)
Discussion started by: drew211
0 Replies

9. Shell Programming and Scripting

Shell script output redirection question

OS : AIX 6.1 Shell : Korn in the url https://forums.oracle.com/forums/thread.jspa?threadID=361463&tstart=0 I came across a crontab entry example 00 23 * * 1,3,5 <complete shell script path> 1> <log file> 2>&1 From googling , I gathered that 0 - stdin 1 - stdout 2 - stderr I... (5 Replies)
Discussion started by: polavan
5 Replies

10. UNIX for Beginners Questions & Answers

Question on bash redirection

Hi, Can I get some explanation around this bash redirection? From what I have read, x < y means call the shell to redirect the output of y into x. Does this mean that this sequence of commands is executed from right to left? diff <(sort testfile.txt) <(sort testfile2.txt) Thanks, edit... (2 Replies)
Discussion started by: sand1234
2 Replies
TAU_MAPPING_OBJECT(3)						  TAU Mapping API					     TAU_MAPPING_OBJECT(3)

NAME
TAU_MAPPING_OBJECT - Declares a mapping object SYNOPSIS
C/C++: TAU_MAPPING_OBJECT(FunctionInfo FuncIdVar); DESCRIPTION
To create storage for an identifier associated with a higher level statement that is mapped using TAU_MAPPING, we use the TAU_MAPPING_OBJECT macro. For example, in the TAU_MAPPING example, the array expressions are created into objects of a class ExpressionKernel, and each statement is an object that is an instance of this class. To embed the identity of the statement we store the mapping object in a data field in this class. This is shown below: EXAMPLE
C/C++ : template<class LHS,class Op,class RHS,class EvalTag> class ExpressionKernel : public Pooma::Iterate_t { public: typedef ExpressionKernel<LHS,Op,RHS,EvalTag> This_t; // // Construct from an Expr. // Build the kernel that will evaluate the expression on the // given domain. // Acquire locks on the data referred to by the expression. // ExpressionKernel(const LHS&,const Op&,const RHS&, Pooma::Scheduler_t&); virtual ~ExpressionKernel(); // Do the loop. virtual void run(); private: // The expression we will evaluate. LHS lhs_m; Op op_m; RHS rhs_m; TAU_MAPPING_OBJECT(TauMapFI) }; SEE ALSO
TAU_MAPPING_CREATE(3), TAU_MAPPING_LINK(3), TAU_MAPPING_PROFILE(3) 08/31/2005 TAU_MAPPING_OBJECT(3)
All times are GMT -4. The time now is 07:46 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy