95 lines
4.6 KiB
Plaintext
95 lines
4.6 KiB
Plaintext
--- General Information.
|
|
module "README"
|
|
|
|
--- General error handling information.
|
|
-- <ul>
|
|
-- <li> Most of the functions available in this library may fail. If any error
|
|
-- occurs the function returns <strong>nil or false</strong>, an error code
|
|
-- (usually errno) and an additional error message text (if avaialable).</li>
|
|
-- <li>At the moment false is only returned when a non-blocking I/O function
|
|
-- fails with EAGAIN, EWOULDBLOCK or WSAEWOULDBLOCK for any others nil is
|
|
-- returned as first parameter. Therefore you can use false to write portable
|
|
-- non-blocking I/O applications.</li>
|
|
-- <li>Note that the function documentation does only mention the return values
|
|
-- in case of a successful operation.</li>
|
|
-- <li>You can find a table of common error numbers and other useful constants
|
|
-- like signal numbers in <strong>nixio.const</strong> e.g. nixio.const.EINVAL,
|
|
-- nixio.const.SIGTERM, etc. For portability there is a second error constant
|
|
-- table <strong>nixio.const_sock</strong> for socket error codes. This might
|
|
-- be important if you are dealing with Windows applications, on POSIX however
|
|
-- const_sock is just an alias for const.</li>
|
|
-- <li>With some exceptions - which are explicitely stated in the function
|
|
-- documentation - all blocking functions are signal-protected and will not fail
|
|
-- with EINTR.</li>
|
|
-- <li>On POSIX the SIGPIPE signal will be set to ignore upon initialization.
|
|
-- You should restore the default behaviour or set a custom signal handler
|
|
-- in your program after loading nixio if you need this behaviour.</li>
|
|
-- </ul>
|
|
-- @class table
|
|
-- @name Errorhandling
|
|
-- @return !
|
|
|
|
--- Function conventions.
|
|
-- <br />In general all functions are namend and behave like their POSIX API
|
|
-- counterparts - where applicable - applying the following rules:
|
|
-- <ul>
|
|
-- <li>Functions should be named like the underlying POSIX API function ommiting
|
|
-- prefixes or suffixes - especially when placed in an object-context (
|
|
-- lockf -> File:lock, fsync -> File:sync, dup2 -> dup, ...)</li>
|
|
-- <li>If you are unclear about the behaviour of a function you should consult
|
|
-- your OS API documentation (e.g. the manpages).</li>
|
|
-- <li>If the name is significantly different from the POSIX-function, the
|
|
-- underlying function(s) are stated in the documentation.</li>
|
|
-- <li>Parameters should reflect those of the C-API, buffer length arguments and
|
|
-- by-reference parameters should be ommitted for pratical purposes.</li>
|
|
-- <li>If a C function accepts a bitfield as parameter, it should be translated
|
|
-- into lower case string flags representing the flags if the bitfield is the
|
|
-- last parameter and also ommiting prefixes or suffixes. (e.g. waitpid
|
|
-- (pid, &s, WNOHANG | WUNTRACED) -> waitpid(pid, "nohang", "untraced"),
|
|
-- getsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) ->
|
|
-- Socket:getopt("socket", "reuseaddr"), etc.) </li>
|
|
-- <li>If it is not applicable to provide a string representation of the
|
|
-- bitfield a bitfield generator helper is provided. It is named FUNCTION_flags.
|
|
-- (open("/tmp/test", O_RDONLY | O_NONBLOCK) -> open("/tmp/test", open_flags(
|
|
-- "rdonly", "nonblock")))</li>
|
|
-- </ul>
|
|
-- @class table
|
|
-- @name Functions
|
|
-- @return !
|
|
|
|
--- Platform information.
|
|
-- <ul>
|
|
-- <li>The minimum platform requirements are a decent POSIX 2001 support.
|
|
-- Builds are more or less tested on Linux, Solaris and FreeBSD. Builds for
|
|
-- Windows XP SP1 and later can be compiled with MinGW either from Windows
|
|
-- itself or using the MinGW cross-compiler. Earlier versions of Windows are not
|
|
-- supported.</li>
|
|
-- <li>In general all functions which don't have any remarks
|
|
-- in their documentation are available on all platforms.</li>
|
|
-- <li>Functions with a (POSIX), (Linux) or similar prefix are only available
|
|
-- on these specific platforms. Same appplies to parameters of functions
|
|
-- with a similar suffix.</li>
|
|
-- <li>Some functions might have limitations on some platforms. This should
|
|
-- be stated in the documentation. Please also consult your OS API
|
|
-- documentation.</li>
|
|
-- </ul>
|
|
-- @usage Tes
|
|
-- @class table
|
|
-- @name Platforms
|
|
-- @return !
|
|
|
|
--- Cryptography and TLS libraries.
|
|
-- <ul>
|
|
-- <li>Currently 3 underlying cryptography libraries are supported: openssl,
|
|
-- cyassl and axTLS. The name of the library in use is written to
|
|
-- <strong>nixio.tls_provider</strong></li>
|
|
-- <li>You should whenever possible use openssl or cyassl as axTLS has only
|
|
-- limited support. It does not provide support for non-blocking sockets and
|
|
-- is probably less audited than the other ones.</li>
|
|
-- <li>As the supported Windows versions are not suitable for embedded devices
|
|
-- axTLS is at the moment not supported on Windows.</li>
|
|
-- </ul>
|
|
-- @usage Tes
|
|
-- @class table
|
|
-- @name TLS-Crypto
|
|
-- @return ! |