A self sheduling script (by using at) seems me the best. I use such a procedure to get hourly satellite images from a website)
Code:
# if the file has been updated (if the datestamp is newer than the previsously saved one)
# then save it and get the datestamp
# calculate the difference between actaul time and datestamp
# if the difference is too big (i.e. > 30 minutes) exit, error, report in logfile etc.
# calculate the time of the next check (15 minutes + 1 or 2 minutes delay depending on the precison of the update time and the delay between timestamp and availability of the file) (That will synchronize the checking with the updating)
# activate the differed launching of this script
# report in logfile
The advantage of at is that if the system is down at sheduled time it will launch the script at the next startup (not possible with cron)
Do tou have other suggestions ?
I can code that in bash if needed but yo
I have an Ultra5 with 2.56 that is connected to a network. We don't use a proxy server on the network but access the internet directly through a gateway. How do I configure the Solaris box to see the internet?
Opening the internet explorer and setting HTTP; FTP etc ports to the ip of the... (3 Replies)
Hi friends
i dont know whether it is the right forum to ask this or not. if its not please excuse me and please give me the link for such a forum.
i am novice about HP 9000 rp3410 server and its things but i had to install and configure it. I came to know that it doesnot comes with builtin... (4 Replies)
I'm relatively new at this scripting game, just need to learn some basic stuff for data handling.
My current need is to write a script that loops through a textfile of filenames, and for each file removes the first line and re-writes that file to a new name.
In fact I could do with knowing... (1 Reply)
Seems simple but I am having difficulty with this one: I am trying to write a single command line argument (which will be a path) - the program should print out the owner of the path.
I can not get anything I write to run.
Please help. (5 Replies)
I have written a script that will email a generic user when a device is "offline". I would like to enhance this by having the script lookup a contact's email and automatically add it to the MAIL_LIST. I am trying to lookup and return data based on a field common in two files
File 1 ... (0 Replies)
Hi,
Can i get some help from any of you guyz on writing Unix script.
my requirement is like reading a csv file, finding a specific pattern in the lines and repalce the string with new string and write it to another file.
My file is file ABC123.dat
Col1,Col2,Col3
102628,AB10 0,21... (2 Replies)
hi all,
i am just getting in to bash scripting, so don't be too harsh...
i've created this little backup script, and it's just awfull... ugly, doesn't work like I want it to, the works. anyways, i was hoping some of you might help me improve it and learn a little in the process.
what i... (13 Replies)
Being linux administrator my task is to keep the machines up and running .Everyday i get a report of list of machines that are up and running.
it would be nice if i get list of machines that are shutdown in comparison to yesterdays report.
for example.If there are 5 machines in my environment... (5 Replies)
Hi Guys, I want to create a shell script to run multiple jobs in sequence.
Explaination -
If I were to run each jobs individually I would have gone to folder - "abin"(where my shellscript is place) as follows
cd abin
abin > runappeng.sh abc001
Now, I have list of programs which are like... (8 Replies)
Hi,
Newbie to Linux needing some help with scripting, here. I've written a script that allows easily shutting down, rebooting, or exiting to terminal mode via a Dialog menu after logging out of X-server. In my .bash_profile I have startx followed by running my script, shutdownmenu.sh, and it... (1 Reply)
Discussion started by: Pop45398
1 Replies
LEARN ABOUT OPENDARWIN
after
after(n) Tcl Built-In Commands after(n)
__________________________________________________________________________________________________________________________________________________NAME
after - Execute a command after a time delay
SYNOPSIS
after ms
after ms ?script script script ...?
after cancel id
after cancel script script script ...
after idle ?script script script ...?
after info ?id?
_________________________________________________________________DESCRIPTION
This command is used to delay execution of the program or to execute a command in background sometime in the future. It has several forms,
depending on the first argument to the command:
after ms
Ms must be an integer giving a time in milliseconds. The command sleeps for ms milliseconds and then returns. While the command is
sleeping the application does not respond to events.
after ms ?script script script ...?
In this form the command returns immediately, but it arranges for a Tcl command to be executed ms milliseconds later as an event
handler. The command will be executed exactly once, at the given time. The delayed command is formed by concatenating all the
script arguments in the same fashion as the concat command. The command will be executed at global level (outside the context of
any Tcl procedure). If an error occurs while executing the delayed command then the bgerror mechanism is used to report the error.
The after command returns an identifier that can be used to cancel the delayed command using after cancel.
after cancel id
Cancels the execution of a delayed command that was previously scheduled. Id indicates which command should be canceled; it must
have been the return value from a previous after command. If the command given by id has already been executed then the after can-
cel command has no effect.
after cancel script script ...
This command also cancels the execution of a delayed command. The script arguments are concatenated together with space separators
(just as in the concat command). If there is a pending command that matches the string, it is cancelled and will never be executed;
if no such command is currently pending then the after cancel command has no effect.
after idle script ?script script ...?
Concatenates the script arguments together with space separators (just as in the concat command), and arranges for the resulting
script to be evaluated later as an idle callback. The script will be run exactly once, the next time the event loop is entered and
there are no events to process. The command returns an identifier that can be used to cancel the delayed command using after can-
cel. If an error occurs while executing the script then the bgerror mechanism is used to report the error.
after info ?id?
This command returns information about existing event handlers. If no id argument is supplied, the command returns a list of the
identifiers for all existing event handlers created by the after command for this interpreter. If id is supplied, it specifies an
existing handler; id must have been the return value from some previous call to after and it must not have triggered yet or been
cancelled. In this case the command returns a list with two elements. The first element of the list is the script associated with
id, and the second element is either idle or timer to indicate what kind of event handler it is.
The after ms and after idle forms of the command assume that the application is event driven: the delayed commands will not be executed
unless the application enters the event loop. In applications that are not normally event-driven, such as tclsh, the event loop can be
entered with the vwait and update commands.
SEE ALSO
bgerror(n), concat(n), update(n), vwait(n)
KEYWORDS
cancel, delay, idle callback, sleep, time
Tcl 7.5 after(n)