the seq isn't working on my ksh version and I can't installed, but I make this:
And it's working ^^
I tried to do something similar to your program where is the seq, but i think it didn't work, it never enter to the if, but the functions are working.
now I have a doubt, when I run my script, one process got the lock, the others just are waiting and the end they got the lock and don't respect my condition to stop at X number.
Hi Bros,
I am in a serious trouble with concurrency issue while using mailx. I have a shell script which reads all the emails of a unix user account and create a copy (another mbox for processing and archive purpose). This script works fine for 99.99% of the time but sometime it start creating... (2 Replies)
Ih all,
i have multiples ksh scripts for crontab's unix jobs
they all have same variables declarations and some similar functions
i would have a only single script file to declare my variables, like:
var1= "aaa"
var2= "bbb"
var3= "ccc"
...
function ab { ...}
function bc { ... }... (2 Replies)
Hi
I am new to this Scripting process and would like to know How can i write a ksh script that will call other ksh scripts and write the output to a file and/or email.
For example
-------
Script ABC
-------
a.ksh
b.ksh
c.ksh
I need to call all three scripts execute them and... (2 Replies)
Hi ,
What is the diffence between executing the script like
./myscript.ksh
. ./myscript.ksh
I have found 2 difference but could not find the reason
1. If i export a variable in myscript.ksh and execute it like . ./myscript.ksh the i can access the other scripts that are present in... (5 Replies)
I'm getting different behaviour when executing below script in debug option.
$ cat ss.ksh
ff=$(pwd)
echo " ff : $ff"
$ ksh ss.ksh
ff : /tmp
$ ksh -x ss.ksh
+ + pwd
ff=
+ echo ff :
ff :
I was getting this behaviour in my actuall script i'm able to reproduce this in simple script... (4 Replies)
Hi,
I am a mid-career programmer with extensive experience in object-oriented design and development in C, C++, and C#. I've written a number of multi-threaded server applications and background services, although my grasp of networking protocols is a bit weak: my current job drifted away from... (2 Replies)
Hi All,
I want to write a domain specific REST/HTTP server to run on FreeBSD. I have control over both the server side and the primary client intended to consume the service.
My question is: how do you think it should be designed to support multiple connections, given:
It will run on a... (6 Replies)
Discussion started by: LittleCookieMon
6 Replies
LEARN ABOUT LINUX
lockfile-remove
lockfile-progs(1) Lockfile programs lockfile-progs(1)NAME
lockfile-progs - command-line programs to safely lock and unlock files and mailboxes (via liblockfile).
SYNOPSIS
mail-lock [--use-pid] [--retry retry-count]
mail-unlock
mail-touchlock [--oneshot]
lockfile-create [--use-pid] [--retry retry-count] [--lock-name] filename
lockfile-remove [--lock-name] filename
lockfile-touch [--oneshot] [--lock-name] filename
lockfile-check [--use-pid] [--lock-name] filename
DESCRIPTION
Lockfile-progs provides a set a programs that can be used to lock and unlock mailboxes and files safely (via liblockfile):
mail-lock - lock the current user's mailbox
mail-unlock - unlock the current user's mailbox
mail-touchlock - touch the lock on the current user's mailbox
lockfile-create - lock a given file
lockfile-remove - remove the lock on a given file
lockfile-touch - touch the lock on a given file
lockfile-check - check the lock on a given file
By default, the filename argument refers to the name of the file to be locked, and the name of the lockfile will be filename .lock. How-
ever, if the --lock-name argument is specified, then filename will be taken as the name of the lockfile itself.
Each of the mail locking commands attempts to lock /var/spool/mail/<user>, where <user> is the name associated with the effective user ID,
as determined by via geteuid(2).
Once a file is locked, the lock must be touched at least once every five minutes or the lock will be considered stale, and subsequent lock
attempts will succeed. Also see the --use-pid option and the lockfile_create(3) manpage.
The lockfile-check command tests whether or not a valid lock already exists.
OPTIONS -q, --quiet
Suppress any output. Success or failure will only be indicated by the exit status.
-v, --verbose
Enable diagnostic output.
-l, --lock-name
Do not append .lock to the filename. This option applies to lockfile-create, lockfile-remove, lockfile-touch, or lockfile-check.
-p, --use-pid
Write the current process id (PID) to the lockfile whenever a lockfile is created, and use that pid when checking a lock's validity.
See the lockfile_create(3) manpage for more information. This option applies to lockfile-create, lockfile-remove, lockfile-touch, and
lockfile-check.
-o, --oneshot
Touch the lock and exit immediately. This option applies to lockfile-touch and mail-touchlock. When not provided, these commands will
run forever, touching the lock once every minute until killed.
-r retry-count, --retry retry-count
Try to lock filename retry-count times before giving up. Each attempt will be delayed a bit longer than the last (in 5 second incre-
ments) until reaching a maximum delay of one minute between retries. If retry-count is unspecified, the default is 9 which will give
up after 180 seconds (3 minutes) if all 9 lock attempts fail.
EXAMPLES
Locking a file during a lengthy process:
lockfile-create /some/file
lockfile-touch /some/file &
# Save the PID of the lockfile-touch process
BADGER="$!"
do-something-important-with /some/file
kill "${BADGER}"
lockfile-remove /some/file
EXIT STATUS
0
For lockfile-check this indicates that a valid lock exists, otherwise it just indicates successful program execution.
Not 0
For lockfile-check a non-zero exit status indicates that the specified lock does not exist or is not valid. For other programs it
indicates that some problem was encountered.
SEE ALSO maillock(3)touchlock(3)mailunlock(3)lockfile_create(3)lockfile_remove(3)lockfile_touch(3)lockfile_check(3)AUTHOR
Written by Rob Browning <rlb@defaultvalue.org>
0.1.12 2008-02-10 lockfile-progs(1)