I tried almost all way using next , redo and last command in perl , But I can't get these syntax correctly in perl. I know its easy ,but still I cant find the efficient way using while and next statement in perl.
I am trying to do the follwoing in perl
One more code I want to do it in perl pls give me some basic idea how to do it without creating any temporary files ..
Hi
I'm not very good with the serach patterns and I'd need a sample how to find a line that has multiple patterns.
Say I want to find a line that has "abd", "123" and "QWERTY" and there can be any characters or numbers between the serach patterns, I have a file that has thousands of lines and... (10 Replies)
Help with script that will check log, then find a match is found, add that as the subject line.
1. The script will always run as a deamon.. and scan the event.log file
2. when a new 101 line is added to the event.log file, have the script check position 5,6 and 7 which is the job name, which... (2 Replies)
Hello, can someone help me how to find a word and 2 lines after it and then send the output to another file.
For example, here is myfile1.txt. I want to search for "Error" and 2 lines below it and send it to myfile2.txt
I tried with grep -A but it's not supported on my system.
I tried with awk,... (4 Replies)
I have a file like this
DoctorName
Address1
Address2
DOB
InsuredName
Address1
Address2
DOB
PatientName
Address1
Address2
DOB
ClaimNo1
DoctorName
Address1
Address2
DOB
InsuredName (2 Replies)
Hi All,
From the below line if we want to display all the text till found pattern dot/. I was trying with the below code but couldn't able
to print text before the pattern. it display texts which is found after pattern.
awk '/assed/{print;getline;print}' file_name | sed 's/^*. *//'
input... (4 Replies)
Hello Everyone,
I have a file with 5 fields in each line just like mentioned below. Also the 4th field is time elapsed(hh:mm:ss) since the process is running
xyz abc status 23:00:00 idle
abc def status 24:00:00 idle
def gji status 27:00:02 idle
fgh gty status 00:00:00 idle
Here I... (8 Replies)
Hi All,
totally new on it , normally use it for just 1 line.
i'm looking for help.
i'm have 2 file.
file 1 :
--------------------------------------------------
c12
c1
c3
--------------------------------------------------
file 2:
other content ... (10 Replies)
Looking for help,
i have input file like below and want to modify to expected output, if can without create additional file, hope can direct modify it.
have 2 thing need do.
1st
is adding a word (testplan generation off) after ! ! IPG: Tue Aug 07 14:31:17 2018
2nd
is adding... (16 Replies)
Discussion started by: kttan
16 Replies
LEARN ABOUT OSX
io::atomicfile
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 v5.16.2 2005-02-10 IO::AtomicFile(3)