The two most common file types are regular files and directories. Regular files are by far the most common type of files in a UNIX system, with program source, documents, executable programs, and scripts all being stored as regular files.
One could argue that executable files are a special type of regular file but their handling by the filesystem is just the same, that is, the file contains a stream of bytes that the filesystem never needs to interpret. Article Contributed By :. Easy Normal Medium Hard Expert. Writing code in comment? Please use ide. Load Comments. What's New. Most popular in Linux-Unix. More related articles in Linux-Unix. We use cookies to ensure you have the best browsing experience on our website.
A Unix pipe provides a one-way flow of data. The output or result of the first command sequence is used as the input to the second command sequence. To make a pipe, put a vertical bar on the command line between two commands. Skip to content. Change Language. Related Articles. Table of Contents. Improve Article. Save Article. Like Article. Next The Linux Kernel. Recommended Articles. Don't try to reinvent the wheel here. Does "without using external libs" also include file s own list of magic signatures?
Then you must find file specifications for all types that you want to recognize and implement the check yourself. It's not even very hard or anything Add a comment.
Active Oldest Votes. Michi Michi 4, 7 7 gold badges 30 30 silver badges 52 52 bronze badges. Mutex Mutex 31 4 4 bronze badges. If you are talking about how the numbers are listed in some reference documentation, then yes, you're correct.
It was just written in a slightly ambiguous way. I'm not the downvote - I would have the integrity to comment if I were — David C. Nunchy Nunchy 5 5 silver badges 11 11 bronze badges. Sorry, but this doesn't help the OP determine if he has a PDF file or not, like he mentioned in the question. I don't think this is what the OP is asking.
OP wants to detect whether the file is PDF, txt, image, etc.
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