1. You are true, i fixed my code with the if then instead of &&.
2. My turn now... ... WARNING about your code :
a) if [ `wc -l $file` ] : this doesn't check whether is exceed 1000 lines
b) by using mv log.tmp $file, you will loose the inode of $file !!!!
this mean that if the logfile is currently being processed you may encounter unexpected behaviour or errors.
That is the reason why it is advisable to use
Code:
cat log.tmp >$file
rm log.tmp
instead of mv log.tmp $file
Quote:
Originally Posted by rbatte1
I'm not sure of your syntax here. We have an if without a then but using && instead and I'm not sure what else will get processed. You may just career on into the cat log.tmp>$file hence why the failure at the else statement.
Consider this:-
Code:
if [ `wc -l $file` ]
then
tail +101 $file > log.tmp
mv log.tmp $file
else
echo "Line count of $file is `wc -l $file`"
fi
I hope that this helps.
Robin
Last edited by ctsgnb; 10-26-2010 at 02:00 PM..
These 2 Users Gave Thanks to ctsgnb For This Post:
Hi experts,
First of all thanks for all your help.
How can i count the lines within a text file and send this number to another text file?
And by the way how can i count the number of files inside a tape ("/dev/rtp") that as one pattern (Ex. "/CTA/") and send this number to a text file?
I... (6 Replies)
Hello,
I have afile which begins with a few urls on multiple lines and then there is listing of some information on separate lines.
The listing begins with the word Name on a given line followed by teh actual list.
I want to count the number of lines in this file after the line having... (6 Replies)
I have a file called xx with the env redirected into it 5 times:
env >> xx
env >> xx
env >> xx
env >> xx
env >> xx
I have to read an input file (here: xx) and look for occurrences of the current user who is executing this script. Once finding an occurrence of the username I have to take that... (4 Replies)
I have a file called xx with the env redirected into it 5 times:
env >> xx
env >> xx
env >> xx
env >> xx
env >> xx
I have to read an input file (here: xx) and look for occurrences of the current user who is executing this script. Once finding an occurrence of the username I have to take that... (2 Replies)
Hi all,
I use bash shell and I have a problem with wc.
I would like to determine the number of lines in a file so I do
wc -l filename
but I don't want to get the filename again
I just would like to have the number of lines and use it in a variable.
Can anybody help?
Thank you, (7 Replies)
Hi,
I have a little problem with counting lines. I know similar topics from this forum, but they don't resolve my problem. I have file with lines like this:
2009-05-25 16:55:32,143 some text some regular expressions ect.
2009-05-25 16:55:32,144 some text.
2009-05-28 18:15:12,148 some... (4 Replies)
Hi All,
I have a output that suppose to be like this (see below please)
App : Line counts
=== ==================
AAA: 100
BBB: 201
CCC: 137
DDD: 32
EEE: 55
for i in `ps -ef | grep App`; do print $i; done
This only shows
App :
=== (12 Replies)
Hi,
I'm using the command: sed -n '$=' $1 on a sh script on AIX.
This script is used to count the number of lines of files.
If the file has no lines at all the command doesn't return nothing.
I need the command to return 0 when the file has no lines at all.
How can I achieve this?
Best... (5 Replies)
Counting number of lines: sp
I am trying to figure out a script to count the number of text files in cywig and have it give me a number (as the answer) any help would be appreciated.
I am new here, so be gentle :D (3 Replies)
Discussion started by: unicksjp
3 Replies
LEARN ABOUT DEBIAN
pcsc-spy
PCSC-SPY(1) PC/SC lite PCSC-SPY(1)NAME
pcsc-spy - A PC/SC spy command
SYNOPSIS
pcsc-spy [-n|--nocolor] [-d|--diffable] [-h|--help] [fifo_filename]
DESCRIPTION
pcsc-spy displays PC/SC calls of an application. It must be used with the libpcscspy.so library.
To be able to spy the PC/SC layer, the application flow must be modified so that all PC/SC calls are redirected. Two options are available:
- the application is linked with libpcsclite.so.1
- the application loads the libpcsclite.so.1 library using dlopen(3)OPTIONS -d, --diffable
Demove the variable parts (like handler values) from the output so that two execution can be more easily compared.
-h, --help
Display a short help text.
-n, --nocolor
Disable the output colorization (if you want redirect the output in a file for example).
-v, --version
Print the version of the pcsc-spy program plus a copyright, a list of authors.
EXAMPLES
Applications linked with libpcsclite.so.1
We will use the standard LD_PRELOAD loader option to load our spying library.
Example:
LD_PRELOAD=/usr/lib/libpcscspy.so opensc-tool -a
Application loading libpcsclite.so.1
This is the case for the PC/SC wrappers like pyscard (for Python) and pcsc-perl (for Perl). The LD_PRELOAD mechanism can't be used. Instead
we replace the libpcsclite.so.1 library by the spying one.
You may use install_spy.sh and uninstall_spy.sh to install and uninstall the spying library.
Using the spying library without pcsc-spy is not a problem but has side effects:
- a line "libpcsclite_nospy.so.1: cannot open shared object file: No such file or directory" will be displayed
- some CPU time will be lost because of the PC/SC calls redirection
Starting the spy tool
pcsc-spy
If a command argument is passed we use it instead of the default ~/pcsc-spy FIFO file. It is then possible to record an execution log and
use pcsc-spy multiple times on the same log.
To create the log file just do:
mkfifo ~/pcsc-spy
cat ~/pcsc-spy > logfile
and run your PC/SC application.
Mac OS X
The installation is not automatic. In the pcsc-lite/src/spy directory do:
make framework
Then copy the PCSC.framework directory in /tmp
cp -a PCSC.framework /tmp
Copy the official PCSC.framework (binary only) in /tmp
cp /System/Library/Frameworks/PCSC.framework/PCSC /tmp
Run the application to debug as:
DYLD_FRAMEWORK_PATH=/tmp pcsctest
FILES
~/pcsc-spy FIFO file is used by libpcsclite.so.1 to send the raw log lines
SEE ALSO pcscd(8)AUTHOR
This manual page was written by Ludovic Rousseau <rousseau@free.fr>
pcsc-lite 1.8.4 2012-02-01 PCSC-SPY(1)
10-26-2010
... WARNING about your code :