I have an inventory program that I would like to have the ability to go and change or alter the field data based on the item number as a key. I have the menu option set but at the end of the script process it just appends the changed data to the database rather than what I would like; which is to... (5 Replies)
hi friens, :)
if i need to find files with extension .c++,.C++,.cpp,.Cpp,.CPp,.cPP,.CpP,.cpP,.c,.C
wat is the pattern for finding them
:confused: (2 Replies)
I want to change a number in a file into number -1..
for instance
file_input is
fdisdlf_s35
fdjsk_s27
fsdf_s42
jkljllljkkl_s57
... etc
now i want the output to be
fdisdlf_s34
fdjsk_s26
fdsf_s41
jkljllljkkl_s56
... etc
I was think of using "sed -e 's/2/1/g' -e 's/3/2/g' -e... (4 Replies)
Hi Experts,
I want to alter two filed of my data file: The _new should come to 2nd column, and _new to be removed from 4rth column, please advise,
datafile.txt
aa /dev/vgAA/lvol1 bb /dev/vgAA_new/lvol1
aa /dev/vgAA1/lvol2 bb /dev/vgAA1_new/lvol2
aa /dev/vgAC/lvol1 bb... (5 Replies)
I have 2 arrays,
@array1 contains records in the format
1|_|X|_|ssd|_|
4|_|H|_|hbd|_|
9|_|Y|_|u8gjdfg|_|
@array2 contains records in the format
X|_|asdf|_|
Y|_|qwer|_|
A|_|9kdkf|_|
@array3 should contain records in the PLz
X|_|ssd|_|asdf|_|
Y|_|hdb|_|qwer|_|
PLZ dont use... (2 Replies)
We have a requirement where we get the Delta Files in every one hour and we need to load them into Oracle database every one hour using Powercenter. To efficiently do this we need to build an File management system.
Here is our process:
we get 6 files for 6 tables with a timestamp appended... (2 Replies)
file1.txt
1 2
10 11
56 57
7 8
43 44
and let's suppose that there is a file called file2.txt with 100 columns
I want to produce a file3.txt with columns specified in file1.txt in that order (1,2,10,11,56,57,7,8,43,44)
Thanks! (2 Replies)
Hi,
I'm not a regular coder but some times I write some basic perl script, hence Perl is bit difficult for me :).
I'm merging two files a.txt and b.txt into c.txt:
a.txt
------
x001;frtb70;xyz;109
x001;frvt65;sec;239
x003;wqax34;jul;659
x004;yhud43;yhn;760
b.txt
------... (8 Replies)
Can I take an argument input, lets say it's, hg0000_xy1_v2, in the script it becomes f ... then hack off the end of the filename to change the variable to hg0000 only.
I tried using sed but can't figure it out.
f="$f" | sed 's/_fg_v//'
I could change the variable label if necessary to... (4 Replies)
I have a script I am trying to test and run but it runs against a jar file. I wrote an external property file so it would redirect with my script, but it keeps going in search of the previous property file. Is there any way to externally over write the jar file and if not how do you go about... (7 Replies)
Discussion started by: risarose87
7 Replies
LEARN ABOUT MOJAVE
io::atomicfile5.18
IO::AtomicFile(3) User Contributed Perl Documentation IO::AtomicFile(3)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 v5.18.2 2005-02-10 IO::AtomicFile(3)