From 6f8944a96a5acd509014caae4e57dafbba51e126 Mon Sep 17 00:00:00 2001 From: Garrett D'Amore Date: Sat, 30 Mar 2024 22:14:33 -0700 Subject: finished proto open pages --- docs/reference/src/compat/nn_errno.3compat.adoc | 79 +++++++++++++++++++++++++ 1 file changed, 79 insertions(+) create mode 100644 docs/reference/src/compat/nn_errno.3compat.adoc (limited to 'docs/reference/src/compat/nn_errno.3compat.adoc') diff --git a/docs/reference/src/compat/nn_errno.3compat.adoc b/docs/reference/src/compat/nn_errno.3compat.adoc new file mode 100644 index 00000000..a048543d --- /dev/null +++ b/docs/reference/src/compat/nn_errno.3compat.adoc @@ -0,0 +1,79 @@ += nn_errno(3compat) +// +// Copyright 2018 Staysail Systems, Inc. +// Copyright 2018 Capitar IT Group BV +// +// This document is supplied under the terms of the MIT License, a +// copy of which should be located in the distribution where this +// file was obtained (LICENSE.txt). A copy of the license may also be +// found online at https://opensource.org/licenses/MIT. +// + +== NAME + +nn_errno - return most recent error (compatible API) + +== SYNOPSIS + +[source,c] +---- +#include + +int nn_errno(void); +---- + +== DESCRIPTION + +The `nn_errno()` function returns the error number corresponding to the +most recent failed operation by the calling thread. + +NOTE: This function is provided for API +xref:nng_compat.3compat.adoc[compatibility] with legacy _libnanomsg_. +Consider using the relevant xref:libnng.3.adoc[modern API] instead. + +IMPORTANT: The error numbers returned from this function may include +errors caused by system functions, which overlap the usual `errno` variable, +and this function simply returns the value of `errno`. +However, the values returned may include numeric values that are not +defined by the system, but are unique to _libnanomsg_, such as `EFSM`. + +This library implements the following error numbers, in addition to any others +that might be set for `errno` by the underlying system: + + +== RETURN VALUES + +This function returns the value of `errno`. +If no operation has failed, then this will be zero. + +== ERRORS + +[horizontal] +`EINTR`:: Operation interrupted. +`ENOMEM`:: Insufficient memory. +`EINVAL`:: Invalid argument. +`EBUSY`:: Resource is busy. +`ETIMEDOUT`:: Operation timed out. +`ECONNREFUSED`:: Connection refused by peer. +`EBADF`:: Invalid or closed socket. +`EAGAIN`:: Operation would block. +`ENOTSUP`:: Protocol or option not supported. +`EADDRINUSE`:: Requested address is already in use. +`EFSM`:: Protocol state incorrect. +`EPROTO`:: Protocol error. +`EHOSTUNREACH`:: Remote peer is unreachable. +`EADDRNOTAVAIL`:: Requested address is not available. +`EACCES`:: Permission denied. +`EMSGSIZE`:: Message is too large. +`ECONNABORTED`:: Connection attempt aborted. +`ECONNRESET`:: Connection reset by peer. +`EEXIST`:: Resource already exists. +`EMFILE`:: Too many open files. +`ENOSPC`:: Insufficient persistent storage. + +== SEE ALSO + +[.text-left] +xref:nn_strerror.3compat.adoc[nn_strerror(3compat)], +xref:nng_compat.3compat.adoc[nng_compat(3compat)], +xref:nng.7.adoc[nng(7)] -- cgit v1.2.3-70-g09d2