The performance problem is not due to your redirection -- that's not ideal, but doesn't really HURT you that much.
It's mostly due to running grep | sed | awk | cut | kitchen | sink repeatedly...
For instance I might do something like
Running one awk for the whole batch is much faster than running 10,000 awks for 10,000 lines. And you may be able to use awk for more than one thing here, fed into several variables a loop, which would help you do more things yet with one program. You could probably even move the grep inside awk.
You can also move your redirection out of the loop completely:
For any further processing needed, it's much more efficient to use shell builtins than awk | cut | sed | kitchen | sink. This being busybox and not bash the builtins you have available will be rather few, though, but it's still not impossible.
Unfortunately, as you have not posted your input data, I have no idea what data needs to be processed into what. What those XML files look like, and exactly what the output from that grep looks like, would be good.
Unfortunately this script need to run on a media player and awk is not available on it. Of course I could always copy it there but I rather use the default tools available on the media player because it makes it easier to distribute.
The input file for this loop as I mentioned on the first post is the list of all my movies on my hard drive created using the find command:
use "getopts" to get params from command. Need replace black with a specified string like "%20
DEFAULT_DELIM=%20
...
while getopts dek:f:t:vh OPTION
do
case $OPTION in
t)
DELIM=`tvar=/'"$OPTARG"'/ svar="$DEFAULT_DELIM" awk 'BEGIN{T=ENVIRON;S=ENVIRON; while(index(T,S)!=0){S=S"0"};print... (0 Replies)
Hi All,
I am trying to understand and change some code written by some programmer a while ago. There are following three lines of code that I am unable to grasp. Could anybody please help me understand it?
1) cd - > /dev/null
2) fname=`basename "$1"` where $1 = /dirA/dirB/a.txt
... (3 Replies)
hi fndz.
Can you please help me with the code if I call a stored procedure from my shell script and stored procedure returns a cursor,
cursor output should be saved to a file (3 Replies)
Hi,
Does anybody know how to enable the shell sh while creating Ramdisk fs using BusyBox? while creating a configuration using the GUI, I see options only for the ash shell. Is there some option in the config file that gets created with which I can enable the sh shell also apart from the ash... (0 Replies)
Hello -- I am trying to learn to do a little sed and awk scripting to search for text and numbers in text files (text processing/manipulation). My professor gave me a piece of uncommented code and I am very unfamiliar w/ the language. Can someone help me with comments so I can understand what is... (2 Replies)
Hi,
I have two files in the format listed below. I need to find out all values from field 12 to field 20 present in file 2 and list them in file3(format as file2)
File1 :
FEIN,CHRISTA... (2 Replies)
Hi All,
I have a script that I wrote on a bash shell, I use it to sort files from a directory into various other directories. I have an variable set, which is an array of strings, I then check each file against the array and if it is in there the script sorts it into the correct folder.
But... (5 Replies)
Hi,
I need to remove first column from a csv file and i can do this by using below command.
cut -f1 -d, --complement Mytest.csv
I need to implement this in shell scripting, Whenever i am using the above command alone in command line it is working fine.
I have 5 files in my directory and... (3 Replies)
I have prepared a shell script to find the duplicates based on the part of filename and retain latest.
#!/bin/bash
if ; then
mkdir -p dup
fi
NOW=$(date +"%F-%H:%M:%S")
LOGFILE="purge_duplicate_log-$NOW.log"
LOGTIME=`date "+%Y-%m-%d %H:%M:%S"`
echo... (6 Replies)
Discussion started by: gold2k8
6 Replies
LEARN ABOUT CENTOS
tcl_allowexceptions
Tcl_AllowExceptions(3) Tcl Library Procedures Tcl_AllowExceptions(3)__________________________________________________________________________________________________________________________________________________NAME
Tcl_AllowExceptions - allow all exceptions in next script evaluation
SYNOPSIS
#include <tcl.h>
Tcl_AllowExceptions(interp)
ARGUMENTS
Tcl_Interp *interp (in) Interpreter in which script will be evaluated.
_________________________________________________________________DESCRIPTION
If a script is evaluated at top-level (i.e. no other scripts are pending evaluation when the script is invoked), and if the script termi-
nates with a completion code other than TCL_OK, TCL_ERROR or TCL_RETURN, then Tcl normally converts this into a TCL_ERROR return with an
appropriate message. The particular script evaluation procedures of Tcl that act in the manner are Tcl_EvalObjEx, Tcl_EvalObjv, Tcl_Eval,
Tcl_EvalEx, Tcl_GlobalEval, Tcl_GlobalEvalObj, Tcl_VarEval and Tcl_VarEvalVA.
However, if Tcl_AllowExceptions is invoked immediately before calling one of those a procedures, then arbitrary completion codes are per-
mitted from the script, and they are returned without modification. This is useful in cases where the caller can deal with exceptions such
as TCL_BREAK or TCL_CONTINUE in a meaningful way.
KEYWORDS
continue, break, exception, interpreter
Tcl 7.4 Tcl_AllowExceptions(3)