Shell script to check files if exist else touch the file
Hi All,
Thanks in Advance
I wrote the following code
there are some 8 files in the directory
it has the common prefix "DUMP_" and suffix as ".csv"
so i used a for loop to check for matching the filenames
but i am getting error in touch command as
Creating
touch: missing file operand
Try `touch --help' for more information.
expr: syntax error
and also error in expr
and the extension .csv is not appending to the files
and its creating only DUMP_subscriber and other files without extension .csv
Kindly assist
Last edited by vbe; 08-30-2012 at 11:33 AM..
Reason: indent...
I have a shell script that runs all the time looking for a certain type of file and then it processes the file through a series of other scripts. The script is watching a directory that has files uploaded to it via SFTP. It already checks the size of the file to make sure that it is not still... (3 Replies)
Hi,
I would like to perform bash which would check the file A.txt to be size 0 or not. If the size is 0, I would copy file B.txt to replace A.txt.
Please help.
Thanks.
-Jason (6 Replies)
I need a script that will check for the existence of new files that FTP'd in the morning, results go to log file. The 2nd step is to compare the new file with the previous days file. If the new file size is 30% or more smaller in size then previous day this needs to also be sent to log.
This... (1 Reply)
UNIX Shell Script
I'm in /home/suneel dirctory
in that directory need to check for a path for example com/src/resources
If Path exists need to copy the files from one directory
If path not exist need to create the folders and copy the files
UNIX shell script help required (3 Replies)
Hi,
Another problem, here is my code
#!/bin/sh
dir='/opt/apps/script/CSV'
datadir='/opt/apps/script/data'
while : ; do
ls -1rt $dir/*.csv > /dev/null 2>&1
if ;then
cp $datadir/weekly.txt $dir/weekly.csv
else
exit 0
fi
done (10 Replies)
Hi,
I am new to shell scripting.Please help me on this.I am using solaris 10 OS and shell i am using is
# echo $0
-sh
My requirement is i have source file say makefile.I need to extract files with extensions (.c |.cxx |.h |.hxx |.sc) from the makefile.after doing so i need to check whether... (13 Replies)
Hi,
I've a situation where i need to check for the file existence and create a zero byte file based on the parameter,in some cases i need to touch and in some case i dont need to touch with zero byte file please help me on parameterizing this touch command??
Regards.
San (2 Replies)
our requirement is that we need to create a touch file on 2 4 and 7 th working day of the each month ...
If the days falls on saturday/sunday, the touch file should be created on next working day.
We are currently on Red hat 6.5 (1 Reply)
Hello,
I needed help with a shell script where in it checks if a file exists under a directory and also checks the age of the file and delete it if it is older than 3 weeks.
thanks (10 Replies)
Discussion started by: hasn318
10 Replies
LEARN ABOUT DEBIAN
shell-quote
SHELL-QUOTE(1p) User Contributed Perl Documentation SHELL-QUOTE(1p)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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)