I'm working on an embedded Linux project that interfaces an ARM9 to a hardware video encoder chip, and writes the video out to SD card or USB stick. The software architecture involves a kernel driver that reads data into a pool of buffers, and a userland app that writes the data to a file on the mounted removable device. I am finding th...
I am confused between the term file modification time and file changed time. Can anyone help to make it clearer? ...
I am going to hosting for files that user submits. I need to grab some data from the file and then move it to some directory. There two points of interest for the lifetime of this file. The first is when the data is being abstracted and the second is when the file is archived so that it can be shared. When data is being abstracted, I'v...
How do you create a hardlink (as opposed to a symlink or a Mac OS alias) in OS X that points to a directory? I already know the command "ln target destination" but that only works when the target is a file. I know that Mac OS, unlike other Unix environments, does allow hardlinking to folders (this is used for Time Machine, for example) b...
How do I check if a file exists, using Python. without using a try: statement? ...
Ok, I have been working with Solaris for a 10+ years, and have never seen this... I have a directory listing which includes both a file and subdirectory with the same name: -rw-r--r-- 1 root other 15922214 Nov 29 2006 msheehan drwxrwxrwx 12 msheehan sysadmin 2048 Mar 25 15:39 msheehan I use file to discover contents of ...
Thinking about a Windows-hosted build process that will periodically drop files to disk to be replicated to several other Windows Servers in the same datacenter. The other machines would run IIS, and serve those files to the masses. The total corpus size would be millions of files, 100's of GB of data. It'd have to deal with possible ...
Recently, I read an article entitled "SATA vs. SCSI reliability". It mostly discusses the very high rate bit flipping in consumer SATA drives and concludes "A 56% chance that you can't read all the data from a particular disk now". Even Raid-5 can't save us as it must be constantly scanned for problems and if a disk does die you are pret...
I have several old 3.5in floppy disks that I would like to backup. My attempts to create an image of the disks have failed. I tried using the UNIX utility dd_rescue, but when the kernel tries to open (/dev/fd0) I get a kernel error "floppy0: probe failed...". I would like an image because some of the floppies are using the LIF file sy...
Is there any way that I can programmatically create (and I guess access) hidden folders on a storage device from within c#? ...
I've got many assemblies/projects in the same c#/.net solution. A setting needs to be saved by people using the web application gui, and then a console app and some test projects need to access the same file. Where should I put the file and how to access it? I've tried using "AppDomain.CurrentDomain.BaseDirectory" but that ends up being...
A product that I am working on collects several thousand readings a day and stores them as 64k binary files on a NTFS partition (Windows XP). After a year in production there is over 300000 files in a single directory and the number keeps growing. This has made accessing the parent/ancestor directories from windows explorer very time c...
I want to search a directory for all files that match a certain pattern. Surprisingly, I have not had to do this since vb6 (Dir)... I'm sure things have changed since then! -Thanks ...
I'm not asking about general syntactic rules for file names. I mean gotchas that jump out of nowhere and bite you. For example, trying to name a file "COM<n>" on Windows? ...
I need to keep as much as I can of large file in the operating system block cache even though it's bigger than I can fit in ram, and I'm continously reading another very very large file. ATM I'll remove large chunk of large important file from system cache when I stream read form another file. ...
Ok, so I have an index.php file which has to process many different file types. how do I guess the filetype based on the REQUEST_URI. If I request http://site/image.jpg, and all requests redirect through index.php, which looks like this <?php include('/www/site'.$_SERVER['REQUEST_URI']); ?> How would I make that work correctly? ...
How can I determine if a remote drive has enough space for me to upload a given file using C# in .Net? ...
I would like to simulate filesystem corruption for the purpose of testing how our embedded systems react to it and ultimately have them fail as gracefully as possible. We use different kinds of block device emulated flash storage for data which is modified often and unsuitable for storage in NAND/NOR. Since I have a pretty good idea of ...
I want to be able to list only the directories inside some folder. This means I don't want filenames listed, nor do I want additional sub-folders. Let's see if an example helps. In the current directory we have: >>> os.listdir(os.getcwd()) ['cx_Oracle-doc', 'DLLs', 'Doc', 'include', 'Lib', 'libs', 'LICENSE.txt', 'mod_p ython-wininst.lo...
If i have lots of directory names either as literal strings or contained in variables, what is the easiest way of combining these to make a complete path? I know of Path.Combine but this only takes 2 string parameters, i need a solution that can take any number number of directory parameters. e.g: string folder1 = "foo"; string folde...