A file handle is an abstract indicator for accessing a file. It is retrieved after successfully opening the file using the file name. Afterwards the file handle is used instead of the file name for all file operations.
Questions tagged [filehandle]
407 questions
2
votes
1 answer
defining a file handle attribute in moose
I am trying to define a file handle attribute in my Perl code using moose as follows:
has validation_log_file_handler => (
is => 'ro', isa => 'File', builder => '_build_validation_log_file_handler'
);
The builder:
sub…
Mike
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2
votes
2 answers
Using Perl FileHandle with a scalar containing string instead of filename
My script download a plain text file using from the internet using LWP::Simple's get() function.
I'd the like to process this string in a filehandle way. I found this 'elegant' (well, I like it) way of doing this from…
moigescr
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2
votes
4 answers
How to get open write handles on a file using C#?
I'm copying from a client computer to a server computer in a shared directory. My server detects the new file, and after the copying is complete it has to process it. The problem is that, when writing a big file and using FileSystemWatcher, you get…
LolaRun
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2
votes
4 answers
Java File handles won't close
Yes this question has been asked before however the issue is a little more complex it seems. I have used all solutions from previous questions that relate to this.
Relates to: Freeing Java File Handles
, Java keeps file locks no matter what
package…
CoasterChris
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votes
2 answers
Perl not matching contents in an array
I have a file which consists of three names: daniel, elaine and victoria. If I search for daniel I get "you are not on the list". Could someone kindly point out where my mistake is? Thank you.
#!/usr/bin/perl
#open file
open(FILE, "names") or…
il-fox
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2
votes
8 answers
How can I avoid Perl::Critic warnings when I process a multi-line string with a filehandle?
Does anyone have a solution to the task of processing a multi-line string one line at a time, other than the string-as-a-filehandle solution shown below?
my $multiline_string = "line one\nline two\nline three\nline four";
my $filehandle;
open(…
Kurt W. Leucht
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votes
1 answer
Perl: how to prevent SIGALRM from closing a pipe?
My pipe (filehandle, socket) breaks (sometimes). I can reproduce it with the following code:
my $counter = 5;
alarm(1);
open(FH,"while(sleep 2); do date; done |") or die $!;
while () { print; }
close(FH);
BEGIN {
$SIG{ALRM} = sub {
…
Willem
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2
votes
1 answer
does pythons tar file finalize a file added, or wait till its closed?
I apologize if the questions title is not clear.
I am creating a very large compressed TarFile using python.
I need to know if when using TarFile.Add() does that close and/or finalize the file added, or can the file still be modified?
For instance,…
Inbar Rose
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2
votes
2 answers
perl process filehandle
I am trying to learn how to read from a process using filehandles. I have tried to write a program that opens a filehandle from the 'date' command and reference that as requested using the following program:
#!/usr/bin/perl
use warnings;
use…
user1607693
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2
votes
1 answer
How can I use tie() to redirect STDOUT, STDERR only for certain packages?
I need to work with some libraries that unfortunately log diagnostic
messages to STDOUT and STDERR. By using tie, I can redirect those
writes to a function that captures those. Since I don't want all
STDOUT and STDERR output of my programs to be…
hillu
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2
votes
1 answer
Game holds handle to wma file after exit
I have an xna game exported in a dll file. Everything to run the game (except the content) is in this library, especially the main game class.
In another assembly, I load the game dll, instantiate the game class and call Run() on it. This will run…
Nico Schertler
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2
votes
3 answers
iOS Efficiency File Saving Efficiency
I was working on my iOS app and my goal is to save a file that I am receiving from the internet bit by bit. My current setup is that I have a NSMutableData object and I add a bit of data to it as I receive my file. After the last "packet" is…
Gavy
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vote
1 answer
perl process inlude files recursively
I would like to process files recursively.
I have a config file, and this config file can include an "include" statement. Once the include-statment is identified, the file shall be processed. It could happen, that in the file processed again an…
averlon
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vote
2 answers
Is a FileHandle.synchronize() still necessary on iOS if closing the file?
On Windows and Linux systems an accidental power loss could cause a recently written file to be corrupted with junk or null bytes (very often when running inside non-Hyper-V VMs which would otherwise have aligned the .vhdx with the physical storage…
oxygen
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vote
0 answers
How to fix Stale File handle Issue in java application?
I have a java application, which generates files (ranging from a few Mb to 100s of Mb). I am getting this error when I try to close the file in the "finally" block.
Flow:
Application read the database, create a CSV file in the server in a specified…
Hemant Kumar
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