Implementation-defined Error Conditions

The following are error condition macros in addition to those specified by the C language specification that might be assigned to errno by the Microchip Unified Standard Library. They expand to positive integer constant expressions with type int, suitable for use in #if preprocessing directives

Table 1. Implementation-defined error condition macros
Macro	Error condition
`E2BIG`	Argument list too long
`EACCES`	Permission denied
`EADDRINUSE`	Address already in use
`EADDRNOTAVAIL`	Address not available
`EADV`	Advertise error
`EAFNOSUPPORT`	Address family not supported by protocol family
`EAGAIN`	No more processes
`EALREADY`	Socket already connected
`EBADE`	Invalid exchange
`EBADF`	Bad file number
`EBADFD`	File descriptor invalid for this operation
`EBADMSG`	Bad message
`EBADR`	Invalid request descriptor
`EBADRQC`	Invalid request code
`EBADSLT`	Invalid slot
`EBFONT`	Bad font file fmt
`EBUSY`	Device or resource busy
`ECANCELED`	Operation canceled
`ECHILD`	No children
`ECHRNG`	Channel number out of range
`ECOMM`	Communication error on send
`ECONNABORTED`	Software caused connection abort
`ECONNREFUSED`	Connection refused
`ECONNRESET`	Connection reset by peer
`EDEADLK`	Deadlock
`EDEADLOCK`	File locking deadlock error
`EDESTADDRREQ`	Destination address required
`EDOTDOT`	Cross mount point (not really error)
`EDQUOT`	Disc quota exceeded
`EEXIST`	File exists
`EFAULT`	Bad address
`EFBIG`	File too large
`EHOSTDOWN`	Host is down
`EHOSTUNREACH`	Host is unreachable
`EHWPOISON`	Memory page has hardware error
`EIDRM`	Identifier removed
`EINPROGRESS`	Connection already in progress
`EINTR`	Interrupted system call
`EINVAL`	Invalid argument
`EIO`	I/O error
`EISCONN`	Socket is already connected
`EISDIR`	Is a directory
`EISNAM`	Is a named type file
`EKEYEXPIRED`	Key has expired
`EKEYREJECTED`	Key was rejected by service
`EKEYREVOKED`	Key has been revoked
`EL2HLT`	Level 2 halted
`EL2NSYNC`	Level 2 not synchronized
`EL3HLT`	Level 3 halted
`EL3RST`	Level 3 reset
`ELIBACC`	Can't access a needed shared lib
`ELIBBAD`	Accessing a corrupted shared lib
`ELIBEXEC`	Attempting to exec a shared library
`ELIBMAX`	Attempting to link in too many libs
`ELIBSCN`	`.lib` section in `a.out` corrupted
`ELNRNG`	Link number out of range
`ELOOP`	Too many symbolic links
`EL3RST`	Level 3 reset
`EMEDIUMTYPE`	Wrong medium type
`EMFILE`	File descriptor value too large
`EMLINK`	Too many links
`EMSGSIZE`	Message too long
`EMULTIHOP`	Multihop attempted
`ENAMETOOLONG`	File or path name too long
`ENAVAIL`	No XENIX semaphores available
`ENETDOWN`	Network interface is not configured
`ENETRESET`	Connection aborted by network
`ENETUNREACH`	Network is unreachable
`ENFILE`	Too many open files in system
`ENOANO`	No anode
`ENOBUFS`	No buffer space available
`ENOCSI`	No CSI structure available
`ENODATA`	No data (for no delay io)
`ENODEV`	No such device
`ENOENT`	No such file or directory
`ENOEXEC`	Exec format error
`ENOKEY`	Required key not available
`ENOLCK`	No lock
`ENOLINK`	Virtual circuit is gone
`ENOMEDIUM`	No medium found
`ENOMEM`	Not enough space
`ENOMSG`	No message of desired type
`ENONET`	Machine is not on the network
`ENOPKG`	Package not installed
`ENOPROTOOPT`	Protocol not available
`ENOSPC`	No space left on device
`ENOSR`	No stream resources
`ENOSTR`	Not a stream
`ENOSYS`	Function not implemented
`ENOTBLK`	Block device required
`ENOTCONN`	Socket is not connected
`ENOTDIR`	Not a directory
`ENOTEMPTY`	Directory not empty
`ENOTNAM`	Not a XENIX named type file
`ENOTRECOVERABLE`	State not recoverable
`ENOTSOCK`	Socket operation on non-socket
`ENOTSUP`	Not supported
`ENOTTY`	Not a character device
`ENOTUNIQ`	Given log. name not unique
`ENXIO`	No such device or address
`EOPNOTSUPP`	Operation not supported on socket
`EOVERFLOW`	Value too large for defined data type
`EOWNERDEAD`	Previous owner died
`EPERM`	Not owner
`EPFNOSUPPORT`	Protocol family not supported
`EPIPE`	Broken pipe
`EPROTO`	Protocol error
`EPROTONOSUPPORT`	Unknown protocol
`EPROTOTYPE`	Protocol wrong type for socket
`EREMCHG`	Remote address changed
`EREMOTE`	The object is remote
`EREMOTEIO`	Remote I/O error
`ERESTART`	Interrupted system call should be restarted
`ERFKILL`	Operation not possible due to RF-kill
`EROFS`	Read-only file system
`ESHUTDOWN`	Can't send after socket shutdown
`ESOCKTNOSUPPORT`	Socket type not supported
`ESPIPE`	Illegal seek
`ESRCH`	No such process
`ESRMNT`	Srmount error
`ESTALE`	Stale file handle
`ESTRPIPE`	Streams pipe error
`ETIME`	Stream ioctl timeout
`ETIMEDOUT`	Connection timed out
`ETOOMANYREFS`	Too many references: cannot splice
`ETXTBSY`	Text file busy
`EUCLEAN`	Structure needs cleaning
`EUNATCH`	Protocol driver not attached
`EUSERS`	Too many users
`EWOULDBLOCK`	Operation would block
`EXDEV`	Cross-device link
`EXFULL`	Exchange full