Redirection Question Post: 302404093

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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...

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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.

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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...

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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...

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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?

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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...

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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...

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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...

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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...

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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...

LEARN ABOUT OPENDARWIN

times

times(1)							   User Commands							  times(1)

NAME

       times - shell built-in function to report time usages of the current shell

SYNOPSIS

   sh
       times

   ksh
       times

DESCRIPTION

   sh
       Print the accumulated user and system times for processes run from the shell.

   ksh
       Print the accumulated user and system times for the shell and for processes run from the shell.

       On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways:

       1.  Variable assignment lists preceding the command remain in effect when the command completes.

       2.  I/O redirections are processed after variable assignments.

       3.  Errors cause a script that contains them to abort.

       4.  Words,  following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari-
	   able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation  are  not
	   performed.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       ksh(1), sh(1), time(1), attributes(5)

SunOS 5.10							    15 Apr 1994 							  times(1)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

question on redirection (<<)

Discussion started by: newkidintown

2. Shell Programming and Scripting

input redirection question

Discussion started by: luistid

3. Shell Programming and Scripting

File redirection question

Discussion started by: Annorax

4. Shell Programming and Scripting

BASH Problem / Question regarding redirection

Discussion started by: mharald