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docs/src/errors.rst
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Abdirahim Musse
include: add EUNATCH errno mapping (#4047)
16 июн 2023, 16:27
Не верифицирован
16 июн 2023, 16:27
6a9e429
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.. _errors: Error handling ============== In libuv errors are negative numbered constants. As a rule of thumb, whenever there is a status parameter, or an API functions returns an integer, a negative number will imply an error. When a function which takes a callback returns an error, the callback will never be called. .. note:: Implementation detail: on Unix error codes are the negated `errno` (or `-errno`), while on Windows they are defined by libuv to arbitrary negative numbers. Error constants --------------- .. c:macro:: UV_E2BIG argument list too long .. c:macro:: UV_EACCES permission denied .. c:macro:: UV_EADDRINUSE address already in use .. c:macro:: UV_EADDRNOTAVAIL address not available .. c:macro:: UV_EAFNOSUPPORT address family not supported .. c:macro:: UV_EAGAIN resource temporarily unavailable .. c:macro:: UV_EAI_ADDRFAMILY address family not supported .. c:macro:: UV_EAI_AGAIN temporary failure .. c:macro:: UV_EAI_BADFLAGS bad ai_flags value .. c:macro:: UV_EAI_BADHINTS invalid value for hints .. c:macro:: UV_EAI_CANCELED request canceled .. c:macro:: UV_EAI_FAIL permanent failure .. c:macro:: UV_EAI_FAMILY ai_family not supported .. c:macro:: UV_EAI_MEMORY out of memory .. c:macro:: UV_EAI_NODATA no address .. c:macro:: UV_EAI_NONAME unknown node or service .. c:macro:: UV_EAI_OVERFLOW argument buffer overflow .. c:macro:: UV_EAI_PROTOCOL resolved protocol is unknown .. c:macro:: UV_EAI_SERVICE service not available for socket type .. c:macro:: UV_EAI_SOCKTYPE socket type not supported .. c:macro:: UV_EALREADY connection already in progress .. c:macro:: UV_EBADF bad file descriptor .. c:macro:: UV_EBUSY resource busy or locked .. c:macro:: UV_ECANCELED operation canceled .. c:macro:: UV_ECHARSET invalid Unicode character .. c:macro:: UV_ECONNABORTED software caused connection abort .. c:macro:: UV_ECONNREFUSED connection refused .. c:macro:: UV_ECONNRESET connection reset by peer .. c:macro:: UV_EDESTADDRREQ destination address required .. c:macro:: UV_EEXIST file already exists .. c:macro:: UV_EFAULT bad address in system call argument .. c:macro:: UV_EFBIG file too large .. c:macro:: UV_EHOSTUNREACH host is unreachable .. c:macro:: UV_EINTR interrupted system call .. c:macro:: UV_EINVAL invalid argument .. c:macro:: UV_EIO i/o error .. c:macro:: UV_EISCONN socket is already connected .. c:macro:: UV_EISDIR illegal operation on a directory .. c:macro:: UV_ELOOP too many symbolic links encountered .. c:macro:: UV_EMFILE too many open files .. c:macro:: UV_EMSGSIZE message too long .. c:macro:: UV_ENAMETOOLONG name too long .. c:macro:: UV_ENETDOWN network is down .. c:macro:: UV_ENETUNREACH network is unreachable .. c:macro:: UV_ENFILE file table overflow .. c:macro:: UV_ENOBUFS no buffer space available .. c:macro:: UV_ENODEV no such device .. c:macro:: UV_ENOENT no such file or directory .. c:macro:: UV_ENOMEM not enough memory .. c:macro:: UV_ENONET machine is not on the network .. c:macro:: UV_ENOPROTOOPT protocol not available .. c:macro:: UV_ENOSPC no space left on device .. c:macro:: UV_ENOSYS function not implemented .. c:macro:: UV_ENOTCONN socket is not connected .. c:macro:: UV_ENOTDIR not a directory .. c:macro:: UV_ENOTEMPTY directory not empty .. c:macro:: UV_ENOTSOCK socket operation on non-socket .. c:macro:: UV_ENOTSUP operation not supported on socket .. c:macro:: UV_EOVERFLOW value too large for defined data type .. c:macro:: UV_EPERM operation not permitted .. c:macro:: UV_EPIPE broken pipe .. c:macro:: UV_EPROTO protocol error .. c:macro:: UV_EPROTONOSUPPORT protocol not supported .. c:macro:: UV_EPROTOTYPE protocol wrong type for socket .. c:macro:: UV_ERANGE result too large .. c:macro:: UV_EROFS read-only file system .. c:macro:: UV_ESHUTDOWN cannot send after transport endpoint shutdown .. c:macro:: UV_ESPIPE invalid seek .. c:macro:: UV_ESRCH no such process .. c:macro:: UV_ETIMEDOUT connection timed out .. c:macro:: UV_ETXTBSY text file is busy .. c:macro:: UV_EXDEV cross-device link not permitted .. c:macro:: UV_UNKNOWN unknown error .. c:macro:: UV_EOF end of file .. c:macro:: UV_ENXIO no such device or address .. c:macro:: UV_EMLINK too many links .. c:macro:: UV_ENOTTY inappropriate ioctl for device .. c:macro:: UV_EFTYPE inappropriate file type or format .. c:macro:: UV_EILSEQ illegal byte sequence .. c:macro:: UV_ESOCKTNOSUPPORT socket type not supported .. c:macro:: UV_EUNATCH protocol driver not attached API --- .. c:macro:: UV_ERRNO_MAP(iter_macro) Macro that expands to a series of invocations of `iter_macro` for each of the error constants above. `iter_macro` is invoked with two arguments: the name of the error constant without the `UV_` prefix, and the error message string literal. .. c:function:: const char* uv_strerror(int err) Returns the error message for the given error code. Leaks a few bytes of memory when you call it with an unknown error code. .. c:function:: char* uv_strerror_r(int err, char* buf, size_t buflen) Returns the error message for the given error code. The zero-terminated message is stored in the user-supplied buffer `buf` of at most `buflen` bytes. .. versionadded:: 1.22.0 .. c:function:: const char* uv_err_name(int err) Returns the error name for the given error code. Leaks a few bytes of memory when you call it with an unknown error code. .. c:function:: char* uv_err_name_r(int err, char* buf, size_t buflen) Returns the error name for the given error code. The zero-terminated name is stored in the user-supplied buffer `buf` of at most `buflen` bytes. .. versionadded:: 1.22.0 .. c:function:: int uv_translate_sys_error(int sys_errno) Returns the libuv error code equivalent to the given platform dependent error code: POSIX error codes on Unix (the ones stored in `errno`), and Win32 error codes on Windows (those returned by `GetLastError()` or `WSAGetLastError()`). If `sys_errno` is already a libuv error, it is simply returned. .. versionchanged:: 1.10.0 function declared public.