Sponsored Content
Top Forums Shell Programming and Scripting By using awk, how to '(backtick)? Post 302354142 by ryandegreat25 on Thursday 17th of September 2009 07:59:41 AM
Old 09-17-2009
backticks is used to evaluate commands, are you gonna execute "cat,echo" inside awk??
that's not possible.
 

10 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

Help with GNU screen: Backtick and Caption.

I'm trying to get GNU screen to show the output of "uptime" for the host being accessed in the current window, but unfortunately, no matter what window I go in, it shows the uptime for the host I originally launched screen in ("adminhost"). Does anyone know how to get this to update from the... (0 Replies)
Discussion started by: akbar
0 Replies

2. Shell Programming and Scripting

Awk problem: How to express the backtick(')

For example: I got a list of file end at .txt. I want all of them do the same command like grep '^@' and attached it to a output .sh file. This is the command I type: ls *.txt | awk '{print "grep \' \^\@\' ",$1}' > txt.sh My desired output is when I type the command "more txt.sh " The... (4 Replies)
Discussion started by: patrick87
4 Replies

3. Shell Programming and Scripting

Perl: combine Backtick & system() I/O operation?

Hi - Within perl I want to execute a system command. I want to re-direct all the output from the command to a file (@result = `$cmd`;), but I ALSO want the results to be displayed on the screen (system("$cmd"); The reason is this - if the command completes, I want to process the output. If the... (6 Replies)
Discussion started by: jeffw_00
6 Replies

4. Shell Programming and Scripting

Perl: Backtick Errors

When trying to use backticks for system commands, is there a way to read the error messages if a command doesn't execute properly? I have no problem getting the results if the command is properly executed. Ex. my @result = `dir`; foreach my $line (@result) { print "Result = $line";... (2 Replies)
Discussion started by: kooshi
2 Replies

5. Shell Programming and Scripting

use backtick inside awk

Hello, Can't we use backtick operator inside awk. nawk ' BEGIN { RS=""; FS="\</input\>" } { for(i=1;i<=NF;i++) { if ($i~/\"\"/) { print `grep XYZ $i`; print $i } } } ' test In the following code, I need to print $i and some... (8 Replies)
Discussion started by: shekhar2010us
8 Replies

6. Shell Programming and Scripting

awk command to compare a file with set of files in a directory using 'awk'

Hi, I have a situation to compare one file, say file1.txt with a set of files in directory.The directory contains more than 100 files. To be more precise, the requirement is to compare the first field of file1.txt with the first field in all the files in the directory.The files in the... (10 Replies)
Discussion started by: anandek
10 Replies

7. Shell Programming and Scripting

HELP with AWK one-liner. Need to employ an If condition inside AWK to check for array variable ?

Hello experts, I'm stuck with this script for three days now. Here's what i need. I need to split a large delimited (,) file into 2 files based on the value present in the last field. Samp: Something.csv bca,adc,asdf,123,12C bca,adc,asdf,123,13C def,adc,asdf,123,12A I need this split... (6 Replies)
Discussion started by: shell_boy23
6 Replies

8. Shell Programming and Scripting

[Solved] Backtick and escapes

Hello all, I have a problem with a bash script. It contains an MySQL query, which when I run it 'as is', executes without a problem. When, however, I try to get it to assign its output to a variable, using the backtick, I get errors. So .. /usr/bin/mysql -N -B mydatabase -e 'SELECT... (3 Replies)
Discussion started by: davidm123SED
3 Replies

9. Shell Programming and Scripting

Passing awk variable argument to a script which is being called inside awk

consider the script below sh /opt/hqe/hqapi1-client-5.0.0/bin/hqapi.sh alert list --host=localhost --port=7443 --user=hqadmin --password=hqadmin --secure=true >/tmp/alerts.xml awk -F'' '{for(i=1;i<=NF;i++){ if($i=="Alert id") { if(id!="") if(dt!=""){ cmd="sh someScript.sh... (2 Replies)
Discussion started by: vivek d r
2 Replies

10. Shell Programming and Scripting

awk output yields error: awk:can't open job_name (Autosys)

Good evening, Im newbie at unix specially with awk From an scheduler program called Autosys i want to extract some data reading an inputfile that comprises jobs names, then formating the output to columns for example 1. This is the inputfile: $ more MapaRep.txt ds_extra_nikira_usuarios... (18 Replies)
Discussion started by: alexcol
18 Replies
Tcl_RecordAndEvalObj(3tcl)				      Tcl Library Procedures					Tcl_RecordAndEvalObj(3tcl)

__________________________________________________________________________________________________________________________________________________

NAME
Tcl_RecordAndEvalObj - save command on history list before evaluating SYNOPSIS
#include <tcl.h> int Tcl_RecordAndEvalObj(interp, cmdPtr, flags) ARGUMENTS
Tcl_Interp *interp (in) Tcl interpreter in which to evaluate command. Tcl_Obj *cmdPtr (in) Points to a Tcl object containing a command (or sequence of commands) to execute. int flags (in) An OR'ed combination of flag bits. TCL_NO_EVAL means record the command but do not evaluate it. TCL_EVAL_GLOBAL means evaluate the command at global level instead of the current stack level. _________________________________________________________________ DESCRIPTION
Tcl_RecordAndEvalObj is invoked to record a command as an event on the history list and then execute it using Tcl_EvalObjEx (or Tcl_Global- EvalObj if the TCL_EVAL_GLOBAL bit is set in flags). It returns a completion code such as TCL_OK just like Tcl_EvalObjEx, as well as a result object containing additional information (a result value or error message) that can be retrieved using Tcl_GetObjResult. If you do not want the command recorded on the history list then you should invoke Tcl_EvalObjEx instead of Tcl_RecordAndEvalObj. Normally Tcl_RecordAndEvalObj is only called with top-level commands typed by the user, since the purpose of history is to allow the user to re- issue recently invoked commands. If the flags argument contains the TCL_NO_EVAL bit then the command is recorded without being evaluated. SEE ALSO
Tcl_EvalObjEx, Tcl_GetObjResult KEYWORDS
command, event, execute, history, interpreter, object, record Tcl 8.0 Tcl_RecordAndEvalObj(3tcl)
All times are GMT -4. The time now is 06:52 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy