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Questions tagged [vfs]

Virtual File System provides a single API for accessing various different file systems. It presents a uniform view of the files from various different sources, such as the files on local disk, on an HTTP server, or inside a Zip archive.

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How are the file-descriptors allocated when an open()/socket() is called from inside kernel?

Some kernel libs (eg. rpc) open a socket inside kernel, and are associated with file-descriptors (FDs). These could be used by any process hitting the code. Given that for any process, the FDs are stored in the task_struct in its File Descriptor…
user31986
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How can I probe file open and close at VFS using SystemTap

I seen example of SystemTap script using probe syscall.open.return { } But there are some application doesn't call systemcall So how can I probe file open at VFS
SilverIce
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Replacing file for specific program

The list of things I have: Windows 8. A program ("foo") that executes another program ("bar"). A "bar". A replacement ("baz") for "bar". Now the "foo" executes the "bar", but I need it to execute the "baz", which will execute "bar" and do things…
user5158598
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Virtual filesystem backed up by key-value database

I am looking for an existing virtual filesystem implementation that stores its data in key-value database. (I was not able to find much as internet is crowded by key-value databases backed up by filesystem.) I would like to avoid creating it,…
Oliver Gondža
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wso2 proxy vfs to vfs - two dependant files

We have requirement to monitor input folder where we are expecting some batch files. The source sends some large files eg : xxx123.dat followed by xxx123.end file to indicate complete transfer. How can we configure wso2 vfs proxy to start reading…
Sajeev
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Using VFS to Write a File

I've recently started working with WSO2 and I am encountering a problem with using the VFS to write to a file.
Joe T.
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Docker out of space with vfs driver

I'm trying to run an image of wordpress in docker 1.6.2 with kernel 2.6.32-042stab106.4, I'm tight on that kernel because docker is installed in a VPS. When Docker tries to download the image the system ran out of space. I tried to change the…
Gerard Ribas
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Why does DefaultFileMonitor keep listing the files in my FTP location in a loop?

An edited version of the java code: FileSystemOptions opts = new FileSystemOptions(); DefaultFileSystemConfigBuilder.getInstance().setUserAuthenticator(opts, auth); // fileToMonitor is the FTP folder. LOG.debug("Trying to resolve…
ilitirit
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create a new file from payload in wso2

I am new to wso2 and working on a few POCs where i have to create a file at some location , i have looked into all vfs examples where there is always a file processed and written to a new location. What i want to achieve is write a new file to a…
Rahul
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SQLite WAL-mode, in-memory, database with private cache?

I am working on a project which relies on the read snapshot isolation that the WAL journal mode provides in Sqlite. It uses multiple connections to the same database to allow concurrent readers and a single writer. For testing, I would like to use…
skabbes
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How to add new samba vfs module to build

I know this question was asked here: samba VFS module but that answer doesn't seem to work for me, so I'm wondering if something's changed... I'm working with source from the 4.1.6 tree and I've added a new vfs module file (under source3/modules),…
Ed.
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Example for reading directory contents in kernel mode?

I am currently working on an antiroot-kit for android as a student project. My task is to identify hidden files on the filesystem. Therefore, I want to read the contents of a directory in a kernel module to compare it with the contents of a…
hasnoroot
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access files in WEB-INF/lib from WAR in Wildfly

I´m trying to deploy an Java EE aplication on WildFly, this application contains a EJB which do a task with applications jars, this jars files stay in WEB-INF/lib inside the .war file, bellow is a stretch of code. @Singleton @Startup public class…
Eduardo Vendruscolo
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linux kernel when is file descriptor not accessible by pread?

so I am reading some kernel code and notice this: http://lxr.free-electrons.com/source/include/linux/fs.h?v=2.6.32#L63 in line 69, we have: /* file can be accessed using pread */ #define FMODE_PREAD ((__force fmode_t)8) I am…
Erben Mo
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FUSE: Multiple opens on the same file

Does the OS/VFS/FUSE-layer manage the semantics of multiple handles to the same file, or is that something that the driver has to arbitrate?
Dustin Oprea
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