03-08-2008
this may seem a little trivial but what if you chown the files to root and run the script as the owner of all the other files.
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
We wish to keep a sequence number in a file. When someone wants to get the next sequence number we need to lock the file, get the next number and increment it by one. How do you do that?
I know how to get the number and increment it but how do I lock the file and test that it is locked or not... (1 Reply)
Discussion started by: tammy_schmuki
1 Replies
2. UNIX for Dummies Questions & Answers
I found a lock file like this
lrwxrwxr-x 1 sskb apollo 16 Oct 22 22:00 lock -> hostname:2747
(pl. note that hostname is a number like 123.4.5.6)
but this was not shown in the file manager eventhough I had selected to show the hidden files.
I could not even read the... (4 Replies)
Discussion started by: sskb
4 Replies
3. UNIX for Dummies Questions & Answers
how can I lock my keyboard while I'm away from the computer without using lock command. What other commands gives me the option to lock keyboard device?
thanks (7 Replies)
Discussion started by: dianayun
7 Replies
4. UNIX for Dummies Questions & Answers
Hi,
We have a lock file being created called lck8c0001 created in Unixware 2.1.2. This is locking a printer.
According to some websites, 8c0001 relates to the device name.
How does one link 8c0001 to those devices listed in the /dev folder?
I have done a ps -lp for all printers and have... (4 Replies)
Discussion started by: canman
4 Replies
5. Red Hat
Hi,
I want to lock the file in linux and the file cannot be edit or modify by other .I know in perl, there is function flock , but it is not worked.
The file can be modifed and edit even if it is locked by flock .
Any other way to lock the file and so other cannot edit or modifed it ????
Any... (7 Replies)
Discussion started by: chuikingman
7 Replies
6. UNIX for Advanced & Expert Users
I have an Essbase installation on Solaris 10 and need to get the backups configured. Unfortunately several key files are locked and Essbase (OLAP application) is not releasing the locks when the Essbase or the applications within stop running. It appears I can use chmod to unlock the files but I... (0 Replies)
Discussion started by: JavaBrian
0 Replies
7. Red Hat
Hello all,
If anyone has time, I have a few questions:
How do I do the following in Linux. We are using Red Hat and Oracle Enterprise Linux, which is based on Red Hat too.
1. How to lock the account after a few (like 3) invalid password attempts?
2. How do you lock a screen after 30... (1 Reply)
Discussion started by: nstarz
1 Replies
8. UNIX for Advanced & Expert Users
Hi all,
I have to test some user priviliges. The goal is to be sure that an unauthorized user can't restart some modules (ssh, mysql etc...).
I'm trying to automate it with a shell script but in same cases I got the syslog broadcast message.
Is there any way to simply get a return code... (3 Replies)
Discussion started by: Dedalus
3 Replies
9. Shell Programming and Scripting
Hi,
Please let me know how these steps are creating a lock file using echo " ".
LOCK_FILE=${LOG_DIR}/${DBNAME}_MD.lock
# create lock file
if
then
echo "Another process is running already. Will terminate this one." >> ${LOG_FILE} 2>&1
echo "If the lock file is not needed, please... (5 Replies)
Discussion started by: sandy162
5 Replies
10. Shell Programming and Scripting
Hello,
I have been working on using "flock"/file lock to prevent two instances of a bash script from being executed. Below is a simplified version of what I have to illustrate the flock part. It works as it is set up there below however the piece I am trying to figure out is how to get it to... (2 Replies)
Discussion started by: infrared013
2 Replies
locks(4) Kernel Interfaces Manual locks(4)
NAME
locks - A directory that contains lock files for communication devices and remote systems that prevent multiple attempts to use the same
device or contact a remote system
SYNOPSIS
/var/spool/locks
DESCRIPTION
Lock files are created by the uucico daemon, the cu command, the tip command, and the uugetty command in the /var/spool/locks directory.
The files are created when the utility opens the serial line for communication.
The lock file locks the device or remote system so that another process cannot access it while it is in use. The file name of the lock file
uses one of the following forms: LCK..device_name LCK..system_name Where device_name is the name of the device (such as ttyd0) and sys-
tem_name is the name of the system (such as hera).
Normally, the process that creates a lock file will remove it when the process has finished using the line. However, it is possible for
lock files to be left behind (for example: system crash, phone line disconnects unexpectedly). This situation has been accounted for and
the commands that use lock files can handle the situation and overwrite these files, if appropriate.
Lock files contains the process ID (PID) of the process that created the lock. The lock file is a data file; to see its contents, use the
following command:
od -d lockfile
Where lockfile is the name of the file. For example: % od -d /var/spool/locks/LCK..ttyd0 0000000 06854 00000 0000004
In this example, the lock file (LCK..ttyd0) was created by the process with PID 6854.
FILES
Contains the uucico daemon and uugetty program. Contains the uucp, cu, and tip programs.
RELATED INFORMATION
Commands: cu(1), od(1), tip(1), uucp(1), uugetty(8)
Daemons: uucico(8) delim off
locks(4)