Thank you , I will check it out, but can you tell me what it does ?
Sorry. I thought it was pretty obvious. But, I see that I left in a debugging statement that probably confused things.
The corrected script is:
The first line sets up an array (c) that counts each occurrence of the timestamps in the first field of the file. (Normally, I would have used $0 here instead of $1, but your 1st line has trailing whitespace characters on the line.)
The rest of the lines execute once after the last line has been read from the input file. It creates a key (k) that is the hour, minute, and second for every second in a day (ignoring leap seconds) and if there was an entry in c for that time, it prints the time and the number of lines that had that time as the 1st field in the input file.
How do I get the number of seconds since 1970, within a script, for the previous day at 23:59? I need this value to pass into a sql statement to cleanup records older than the previous day at midnight. It will be automated via cron so no hard coding allowed.
Thanks! (2 Replies)
Hello everybody, how i can get how many lines are writed in a file in the last 5 seconds?
For ezample i have 'file1' that is filled by a process automatically and i neet to know how many lines with the word 'EXACTO' were filled the last 5 seconds, can somebody help me?
I try with:
tail -f... (16 Replies)
Hi All,
I need a script which does,
script check a file every 15 second, if file not exist, it will create a log file.
how can I do it ?
thanks
Alice (4 Replies)
Any sleek way to convert seconds to hh:mm:ss format .
I know it can be done by mod and divide . Looking for a one liner if possible .
Example
3600 seconds = 01:00:00
3601 seconds = 01:00:01 (2 Replies)
hi all UNIX Gurus,
this is my first post...so i posting this with great expectations:o...hoping to get the similar replies...
my question is....
need to get timestamp with millisecond in UNIX. Date command gives Year,month day, hour,minute and second but it does not give millisecond.
Any... (5 Replies)
Hi All
I need to convert a number of fields in a record from seconds to hh:mm:ss ( or possibly hhh:mm:ss ). I'm guessing awk is the way to go .
File has multiple records and each record contains 101 fields - can awk handle that ? The seconds values will be in fields 3 - 101 and could be 0.
... (4 Replies)
Hi,
In my shell script, (as per the requirement), I am creating few files, and the processes are launched parallelly . (by using "&" at the end of the command line). As per the logic, I need to remove these files as well, after creating.
But, the problem is, due to parallel processing,... (3 Replies)
Is there a function call in std library or unit command that returns the number of current leap seconds?
GG (4 Replies)
Discussion started by: NAVTime
4 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)