02-27-2014
Quote:
Originally Posted by
Shandel
but if my process launchs two instance of script after of reception of two seperate .zip archive, under my work dir i will have two set of file, how can i determine which file belongs to first script invocation and which group belongs to second instance of script, any idea, thanks anyway Ahamad
'mv' with a destination inside the same folder should be atomic. Only one will end up renaming the file, the other will harmlessly say 'no such file or directory'.
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hi,
After checking all the UNIX threads, I am able to come up with a solution so far. I am working on a shell script where it moves the files to a certain directory. The conditions to check are
1) Check if the file exists in the current directory.
2) Check if the destination directory... (2 Replies)
Discussion started by: madhunk
2 Replies
2. UNIX for Dummies Questions & Answers
i need a script which will create a archive of the files older than 10 days........ (2 Replies)
Discussion started by: jayaramanit
2 Replies
3. Shell Programming and Scripting
Hey guy,
how to make bash script to create foo.txt file and add current date into file content and that file always append.
example: today the script run and add today date into content foo.txt
and tomorrow the script will run and add tomorrow date in content foo.txt without remove today... (3 Replies)
Discussion started by: chenboly
3 Replies
4. UNIX for Dummies Questions & Answers
I've setup a cron job that greps a file every five minutes and then writes (appends) the grep output/result to another file:
grep "monkey" zoo.log | tail -1 >> cron-zoo-log
Is there any way I can add the date and time (timestamp) to the cron-zoo-log file for each time a new line was added?
... (12 Replies)
Discussion started by: Sepia
12 Replies
5. Shell Programming and Scripting
hi people,
i have texts down.txt and down-new.txt and i want to check;
- if down-new.txt is NOT empty, then write date and its content to /home/gc_sw/down.txt
for example;
down.txt:AAAA
SSSS
down-new.txt:123
456
and after checking down-new.txt is NOT empty, down.txt should... (10 Replies)
Discussion started by: gc_sw
10 Replies
6. Shell Programming and Scripting
I need to be able to take the results from ls -l command and modify the output as follows:
I will run
ls -l *.mak
My results will be
aa.mak
bb.mak
cc.mak
I then need to take those results and create a file that has the following info:
dsjj/ubin/aa
dsjj/ubin/bb
dsjj/ubin/cc
... (3 Replies)
Discussion started by: jclanc8
3 Replies
7. Shell Programming and Scripting
Plese help I need a urgent requirement.
Ex: test.log
requirement : using shell script I need to archive the log file and nil and the content of (test.log) file to 0 kb
and then in the archive folder log files are name to test.tar
test1.tar
test2.tar
EX:
/home/abc/
test.log ... (1 Reply)
Discussion started by: johney1981
1 Replies
8. UNIX for Dummies Questions & Answers
Hi ladies and gentleman.. I have two text file with me. I need to replace one of the file content to another file if one both files have a matching pattern.
Example:
text1.txt:
ABCD 1234567,HELLO_WORLDA,HELLO_WORLDB
DCBA 3456789,HELLO_WORLDE,HELLO_WORLDF
text2.txt:
XXXX,ABCD... (25 Replies)
Discussion started by: bananamen
25 Replies
9. Shell Programming and Scripting
I am attempting to rename files within a zipped archive with the beginning of the name of the zip file. For example unzip AAA_000.zip and rename file1.csv, file2.txt to AAA_file1.csv, AAA_file2.txt.
I am able to do this for a zip file with one file inside, but not for multiple files. This is... (2 Replies)
Discussion started by: lcp
2 Replies
10. Shell Programming and Scripting
hi all,
i had the below script
x=`cat input.txt |wc -1`
awk 'NR>1 && NR<'$x' ' input.txt > output.txt
by using above script i am able to remove the head and tail part from the input file and able to append the output to the output.txt but if i run it for second time the output is... (2 Replies)
Discussion started by: hemanthsaikumar
2 Replies
LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)
NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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)