Hi
I amtrying to read the lines from a file, these lines are absolute paths in the system. I want to check if these paths exists, if they doesn't I want to create that path and put a file in that location/path.
I had no trouble filtering these paths out using awk, grep, uniq etc but when it... (8 Replies)
I am an Awk newbie and cannot wrap my brain around my problem:
Given multi-line records of varying lengths separated by a blank line I need to skip the first two lines
of every record and extract every-other line in each record unless the first line of the record has the word "(CONT)" in the... (10 Replies)
Hi,
I am doing file processing line by line. while reading each line at a specified location I am searching for a particular character and then write that line to another file.
Problem is while writing to another file it was supressing the spaces, which I don't want to do.
Any help is... (1 Reply)
Hi,
I am a beginner in shell scripting. I have written the following script, which is supposed to process the while loop for each line in the sid_home.txt file. But I'm getting the 'end of file' unexpected for the last line. The file sid_home.txt gets generated as expected, but the script... (6 Replies)
I need a script to process a huge single line text file:
The sample of the text is:
"forward_inline_item": "Inline", "options_region_Australia": "Australia", "server_event_err_msg": "There was an error attempting to save", "Token": "Yes", "family": "Family","pwd_login_tab": "Enter Your... (1 Reply)
Hi,
My awk program is failing. I figured out using command
od -c filename
that the last line of the file doesnt end with a new line character.
Mine is an automated process because of this data is missing.
How do i handle this?
I want to append new line character at the end of last... (2 Replies)
Hi Sorry to multipost. I am opening the new thread because the earlier threads head was misleading to my current doubt.
and i am stuck.
list=`cat /u/Test/programs`;
psg "ServTest" | awk -v listawk=$list '{
cmd_name=($5 ~ /^/)? $9:$8
for(pgmname in listawk)
... (6 Replies)
Hi, all
I have a file containing the following data:
name: PRODUCT_1
date: 2010-01-07
really_long_name: PRODUCT_ABCDEFG
I want to get the date (it is "2010-01-07" here), I could use the following code to do that:
awk... (6 Replies)
Hi ,
I have a file like
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Dear Cyrus Every relationship needs nurturing. Including ours.
2011-08-09T10:18:14Z
2011-08-09T10:18:14Z
tag:gmail.google.com,2004:1376659800396305843
T League
email@email.tleague.com
How to refresh a graphical display through... (3 Replies)
My file (the output of an experiment) starts off looking like this,
_____________________________________________________________
Subjects incorporated to date: 001
Data file started on machine PKSHS260-05CP
**********************************************************************
Subject 1,... (9 Replies)
Discussion started by: samonl
9 Replies
LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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)