- read rand.dat and store the contents into an associative array 'r'
- for each line of temp.dat, if r[FNR]==1, then change $3 and $4.
- Print every line (the '1' and the end)
Hello, I'm writing a bash script and I have a question.
Here's what I'm doing:
I have a file called inv.dat which contains the following:
B102:Action Figure - Teacher:79
B103:Bike - Purple:23
B104:Baseball:25
B105:Cricket Bat:15
B101:Action Figure - Fireman:15
B100:Flame-Thrower:25
... (2 Replies)
In a bash script I've set a variable that is the directory name of where an executable lives.
the_dir=`dirname $which myscript`
which equates to something like "/path/to/dir/bin"
I need to cut that down to remove the "bin" so I now have "/path/to/dir/".
This sounds easy but as a... (2 Replies)
Hey all, Im kind of lost on how to do what I want so I figured I would ask.
I want to pipe STDOUT of an app to a log file, but I want to prepend each line of that output with the date and time.
Im drawing a complete blank on how to do this?? Any ideas?
i.e.
output is currently this:... (9 Replies)
Hi All,
I am using a bash shell and want to the following thing.
A process sends the following string to my script
BACKUP_FAIL_REASON="Failed - Application Dump CDMACA-0:grep: /opt/nortel/ca/data/1245184/sd00/image1/S110907070708HIS... (4 Replies)
I don't know if this is a big issue or not, but I'm having difficulties. I apoligize for the upcoming essay :o.
I'm writing a script, similar to a paint program that edits images, but in the form of ANSI block characters. The program so far is working. I managed to save the image into a file,... (14 Replies)
Hello guys,
here is my problem:
I got a shell script which is called by an external piece of software, the external software is not under my control. The software passes data as an argument to my script like
./bla.sh 'service;1234567890;ok;hostname;some text here'
I need to pass the... (3 Replies)
In my script I'm retrieving a parameter through an API call. I need to trim some things out of the result so I can use it as a parameter to pass to another process. I've got it working but it's pretty kludgy and I'm hoping someone can help me with a better way.
This is the code that retrieves... (2 Replies)
seeking assistance on comparing two arrays using bash:
array1=(disk1, disk2, disk3, disk5, disk7, vol1, vol2, vol3, vol4, vol5)
array2=(disk2, disk5 vol2, vol4 )
1) if two arrays have same elements; EXIT
else populate array3 & array4 with elements that are different between array1 & array2 as:... (3 Replies)
I need to change a file like this:
John Smith;http://www.profile1.com
John Smith;http://www.profile2.com
Frank Olsen;http://www.profile3.com
Frank Olsen;http://www.profile4.com
Into:
John Smith;http://www.profile1.com;http://www.profile2.com
Frank... (2 Replies)
Guys, I have a variable in a script that I want to transform to into something else Im hoping you guys can help. It doesn't have to use sed/awk but I figured these would be the simplest.
DATE=20160120
I'd like to transform $DATE into "01-20-16" and move it into a new variable called... (8 Replies)
Discussion started by: dendenyc
8 Replies
LEARN ABOUT DEBIAN
io::atomicfile
IO::AtomicFile(3pm) User Contributed Perl Documentation IO::AtomicFile(3pm)NAME
IO::AtomicFile - write a file which is updated atomically
SYNOPSIS
use IO::AtomicFile;
### Write a temp file, and have it install itself when closed:
my $FH = IO::AtomicFile->open("bar.dat", "w");
print $FH "Hello!
";
$FH->close || die "couldn't install atomic file: $!";
### Write a temp file, but delete it before it gets installed:
my $FH = IO::AtomicFile->open("bar.dat", "w");
print $FH "Hello!
";
$FH->delete;
### Write a temp file, but neither install it nor delete it:
my $FH = IO::AtomicFile->open("bar.dat", "w");
print $FH "Hello!
";
$FH->detach;
DESCRIPTION
This module is intended for people who need to update files reliably in the face of unexpected program termination.
For example, you generally don't want to be halfway in the middle of writing /etc/passwd and have your program terminate! Even the act of
writing a single scalar to a filehandle is not atomic.
But this module gives you true atomic updates, via rename(). When you open a file /foo/bar.dat via this module, you are actually opening a
temporary file /foo/bar.dat..TMP, and writing your output there. The act of closing this file (either explicitly via close(), or
implicitly via the destruction of the object) will cause rename() to be called... therefore, from the point of view of the outside world,
the file's contents are updated in a single time quantum.
To ensure that problems do not go undetected, the "close" method done by the destructor will raise a fatal exception if the rename() fails.
The explicit close() just returns undef.
You can also decide at any point to trash the file you've been building.
AUTHOR
Primary Maintainer
David F. Skoll (dfs@roaringpenguin.com).
Original Author
Eryq (eryq@zeegee.com). President, ZeeGee Software Inc (http://www.zeegee.com).
REVISION
$Revision: 1.2 $
perl v5.12.4 2011-09-18 IO::AtomicFile(3pm)