2009年11月23日 · POSIX is similar to the UNIX standard, and it is intended to ensure that software written for one POSIX-compliant operating system can run on other POSIX-compliant operating systems without modification. The POSIX standard defines a set of system calls, libraries, and utilities that are commonly found in UNIX-based operating systems.

POSIX first was a standard in 1988 long before the Single UNIX Specification. It was one of the attempts at unifying all the various UNIX forks and UNIX-like systems. POSIX is an IEEE Standard, but as the IEEE does not own the UNIX® trademark, the standard is not UNIX® though it is based on the existing UNIX API at that time.

In addition to the web links, you can also install the POSIX man pages, e.g. on a Debian-like system they are available as manpages-posix-dev package. Then you can lookup the POSIX version of say - the read system call - via: $ man 3p read Or the mv command $ man 1p mv Just add a p to the usual man page section number.

2020年6月18日 · POSIX versions. Note that since Gilles' answer alias has changed from optional in POSIX 2004 to mandatory in POSIX 2008. So you have to take also in account the POSIX version against which compliance is claimed or searched. This might be confusing due to "standard" vs. "revision" vs. "edition" vs. "version".

2018年3月15日 · Do be careful to check which version of POSIX you're allowed to code to. 2008 - which I gave the refs to - is quite new and not all functions are necessarily available everywhere. You might decide to write covers for some new functions, but you won't be able to that for some so don't use them. –

2019年2月13日 · pathlib has an as_posix method to convert from Windows to POSIX paths: pathlib.path(r'foo\bar').as_posix() Apart from this, you can generally construct system-specific paths by calling the appropriate constructor. The documentation states that. You cannot instantiate a WindowsPath when running on Unix, but you can instantiate PureWindowsPath ...

2024年1月7日 · My understanding is: POSIX storage refers to any storage that can be accessed using POSIX filesystem functions (ie. the usual 'fopen'), and that complies with POSIX filesystem requirements: this means that it must provide several facilities like POSIX attributes, or atomic file-blocking strictly following POSIX semantics.

Today, POSIX and SUS are basically the same thing; SUS encompasses a little more. Quoting here: Beginning in 1998, a joint working group known as the Austin Group began to develop the combined standard that would be known as the Single UNIX Specification Version 3 and as POSIX:2001 (formally: IEEE Std 1003.1-2001). It was released on January 30 ...

2013年10月31日 · POSIX. POSIX is a much larger and more comprehensive standard which includes standard C as a part of it. POSIX also specifies parts of the operating system. Because POSIX is standardized, there are many implementations. On a POSIX system, there are some restrictions on the C implementation. For example, on POSIX: A byte is always 8 bits

2014年11月20日 · @Sandburg POSIX is a standard, so it can't have built-ins. It doesn't define if something should be built into the interpreter or not, just what it has to do. These rules apply to both forms, test and [alike. If a shell can do the evaluation on its own, that saves you a process and makes it somewhat faster, but the result has to be the same.