Windows CRT errno Codes

The errno values defined by the Microsoft C Runtime (CRT) and set by standard C library functions on Windows. These differ from POSIX errno in both numeric values and available codes. Symbolic names are defined in <errno.h>.

79 codes

• E2BIG Argument list too long
• EACCES Permission denied
• EADDRINUSE Address already in use
• EADDRNOTAVAIL Address not available
• EAFNOSUPPORT Address family not supported
• EAGAIN Resource temporarily unavailable
• EALREADY Connection already in progress
• EBADF Bad file descriptor
• EBADMSG Bad message
• EBUSY Device or resource busy
• ECANCELED Operation cancelled
• ECHILD No child processes
• ECONNABORTED Connection aborted
• ECONNREFUSED Connection refused
• ECONNRESET Connection reset by peer
• EDEADLK Resource deadlock avoided
• EDESTADDRREQ Destination address required
• EDOM Math argument out of domain
• EEXIST File exists
• EFAULT Bad address
• EFBIG File too large
• EHOSTUNREACH Host unreachable
• EIDRM Identifier removed
• EILSEQ Illegal byte sequence
• EINPROGRESS Operation in progress
• EINTR Interrupted function call
• EINVAL Invalid argument
• EIO Input/output error
• EISCONN Already connected
• EISDIR Is a directory
• ELOOP Too many levels of symbolic links
• EMFILE Too many open files
• EMLINK Too many links
• EMSGSIZE Message too long
• ENAMETOOLONG Filename too long
• ENETDOWN Network is down
• ENETRESET Connection aborted by network
• ENETUNREACH Network unreachable
• ENFILE Too many files open in system
• ENOBUFS No buffer space available
• ENODATA No message available
• ENODEV No such device
• ENOENT No such file or directory
• ENOEXEC Exec format error
• ENOLCK No locks available
• ENOLINK Link has been severed
• ENOMEM Out of memory
• ENOMSG No message of desired type
• ENOPROTOOPT No such protocol option
• ENOSPC No space left on device
• ENOSR No STREAM resources
• ENOSTR Not a STREAM
• ENOSYS Function not implemented
• ENOTCONN Socket not connected
• ENOTDIR Not a directory
• ENOTEMPTY Directory not empty
• ENOTRECOVERABLE State not recoverable
• ENOTSOCK Not a socket
• ENOTSUP Not supported
• ENOTTY Inappropriate I/O control operation
• ENXIO No such device or address
• EOPNOTSUPP Operation not supported on socket
• EOTHER Other error
• EOVERFLOW Value too large
• EOWNERDEAD Previous owner died
• EPERM Operation not permitted
• EPIPE Broken pipe
• EPROTO Protocol error
• EPROTONOSUPPORT Protocol not supported
• EPROTOTYPE Protocol wrong type for socket
• ERANGE Result too large
• EROFS Read-only file system
• ESPIPE Invalid seek
• ESRCH No such process
• ETIME Timer expired
• ETIMEDOUT Connection timed out
• ETXTBSY Text file busy
• EWOULDBLOCK Operation would block
• EXDEV Improper link