10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I am still learning shell scripting. Recently I see a function for read configuration. But some of special character make me confused. I checked online to find answer. It was not successful. I post the code here to consult with expert or guru to get better understanding on these special characters... (3 Replies)
Discussion started by: duke0001
3 Replies
2. Red Hat
our requirement is that we need to create a touch file on 2 4 and 7 th working day of the each month ...
If the days falls on saturday/sunday, the touch file should be created on next working day.
We are currently on Red hat 6.5 (1 Reply)
Discussion started by: tradingspecial
1 Replies
3. Shell Programming and Scripting
when I execute the unix commands its works normally in the 1st part.
When I the tried the same in shell scripting the directory is not displayed in 2nd part example. please let me know what needs to be done.
Unix :
client=~zsvdbs
echo $client
/shome/zsvhome/zsvdbs
Using... (3 Replies)
Discussion started by: keerthi2016
3 Replies
4. Shell Programming and Scripting
Hello Gurus,
I have a script developed...
#!/bin/bash
#---------------------------------------------------------------------
# This pScript will remove/replace the special characters fromfiles
#---------------------------------------------------------------------
trxdate="`date... (1 Reply)
Discussion started by: nanduedi
1 Replies
5. Shell Programming and Scripting
Hi All,
Thanks in Advance
I wrote the following code
if
then
echo "version is 1.1"
for i in "subscriber promplan mapping dedicatedaccount faflistSub faflistAcc accumulator pam_account"
do
FILE="SDP_DUMP_$i.csv"
echo "$FILE"
... (5 Replies)
Discussion started by: aealexanderraj
5 Replies
6. Shell Programming and Scripting
I recently needed to collect arrow keys (and function keys etc.) in a shell script so that I could run a text graphics-style data entry system (with text entry fields, drop-down list boxes, progress bars and the like). Yes you can do all this in shell, and portably too if you're careful.
I've... (4 Replies)
Discussion started by: cambridge
4 Replies
7. UNIX for Dummies Questions & Answers
Hello everybody,
I am new to Unix.
I am using and application that uses the rlpr print command to print from Unix and i have noticed sth strange, and i have no idea about it.
When the application generates a file that start with the up arrow key character, the rlpr command prints an empty... (1 Reply)
Discussion started by: alex1982
1 Replies
8. Shell Programming and Scripting
Hi,
I am writing a Perl script that reads in many lines, if a line meets the criteria I want to edit, it. For example, the script will return the following example line... test=abc123
All I want to do is strip off the "test=" and just be left with the abc123. In my script I can easily... (3 Replies)
Discussion started by: edrichard
3 Replies
9. Shell Programming and Scripting
Hi,
I'm currently working on a project that requires parsing xml file. One of the field in the xml is shown below (don't remember exactly):
<variable="ITEM">12345678</variable>
I coded my script keeping in mind that the value denoted in bold will always be a number. After getting just the... (1 Reply)
Discussion started by: mradul_kaushik
1 Replies
10. UNIX for Dummies Questions & Answers
how to use the arrow keys in shell scripting. is there any special synatax / command for this.
i just want to use the arrow keys for navigation.
replies appreciated
raguram R (3 Replies)
Discussion started by: raguramtgr
3 Replies
SHELL-QUOTE(1p) User Contributed Perl Documentation SHELL-QUOTE(1p)
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 v5.8.4 2005-05-03 SHELL-QUOTE(1p)
