Hi,
I want to extract block of data from flat file.
the data will be like this
start of log
One
two
three
end of log
i want all data between start of log to end of log i.e One
two
three to be copied to another file.
This particular block may appear multiple times in same file. I... (4 Replies)
Hi All,
Currently i have to write a script.
For which i need to cut a block from .txt file.
I know the specific word that starts the block and ends the block.
Can we do it in shell scripting..?
Please suggest.... (6 Replies)
Hi,
i want to fetch the data from the alert log file, for a particular time interval.
Example :
Alert log content :
Thu Mar 18 08:47:36 2010
Completed: alter database open
Thu Mar 18 19:13:38 2010
MMNL absent for 6390 secs; Foregrounds taking over
Fri Mar 19 08:30:52 2010... (1 Reply)
Dears,
I'm new to shell scripting and i was wondering if you can help me with following matter.
I have a file containing 400,000 records. The file contains two columns like:
00611291,0270404000005453
25262597,1580401000016155
25779812,1700403000001786
00388934,1200408000000880... (1 Reply)
Hi evry1,
This is my 1st post in this forum.Pls help me
I want to extract some data froma xml file which has 2000 lines using shell scripting. Actually my xml file has some "audio and video codes" which i need to arrange in a column wise format after extracting it using shell scripting.I... (4 Replies)
Hi ,
I have input file as XML. following are input data
#complex.xml
Code:
<?xml version="1.0" encoding="UTF-8"?><TEST_doc xmlns="http://www.w3.org/2001/XMLSchema-instance"> <ENTRY uid="123456"> <protein> <name>PROT001</name> <organism>Human</organism> ... (1 Reply)
I have input data looks like this which is a part of a csv file
7,1265,76548,"0102:04"
8,1266,76545,"0112:04"
I need to make the output data should look like this and the output data will be part of text file:
7|1265000 |7654899 |A|
8|12660000 |76545999 |B|
The logic behind the... (6 Replies)
Discussion started by: RJG
6 Replies
LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$SHELL -c". This doesn't work as intended:
ssh host touch 'hi there' # fails
It creates 2 files, hi and there. Instead, do this:
cmd=`shell-quote touch 'hi there'`
ssh host "$cmd"
This gives you just 1 file, hi there.
process find output
It's not ordinarily possible to process an arbitrary list of files output by find with a shell script. Anything you put in $IFS to
split up the output could legitimately be in a file's name. Here's how you can do it using shell-quote:
eval set -- `find -type f -print0 | xargs -0 shell-quote --`
debug shell scripts
shell-quote is better than echo for debugging shell scripts.
debug() {
[ -z "$debug" ] || shell-quote "debug:" "$@"
}
With echo you can't tell the difference between "debug 'foo bar'" and "debug foo bar", but with shell-quote you can.
save a command for later
shell-quote can be used to build up a shell command to run later. Say you want the user to be able to give you switches for a command
you're going to run. If you don't want the switches to be re-evaluated by the shell (which is usually a good idea, else there are
things the user can't pass through), you can do something like this:
user_switches=
while [ $# != 0 ]
do
case x$1 in
x--pass-through)
[ $# -gt 1 ] || die "need an argument for $1"
user_switches="$user_switches "`shell-quote -- "$2"`
shift;;
# process other switches
esac
shift
done
# later
eval "shell-quote some-command $user_switches my args"
OPTIONS --debug
Turn debugging on.
--help
Show the usage message and die.
--version
Show the version number and exit.
AVAILABILITY
The code is licensed under the GNU GPL. Check http://www.argon.org/~roderick/ or CPAN for updated versions.
AUTHOR
Roderick Schertler <roderick@argon.org>
perl v5.16.3 2010-06-11 SHELL-QUOTE(1)