errno: Operating system error codes
This module defines symbolic constants that represent different operating system error conditions. The constant names (such as ENOENT) are equivalent to C errno symbolic error names. These constants can be mapped to integer errno values using CodeToErrno.
See also: The error values defined in this module are commonly encountered together with std::IoError objects.
Functions
- CodeToErrno(code as Constant) as Int
-
Return the integer errno matching a symbolic constant from
the below list. Return 0
if the errno value is not defined for the current operating
system. Example:
CodeToErrno(ENOENT) -- 2 (exact value may vary across operating systems) - ErrnoToCode(errno as Int) as Constant
-
Return a symbolic constant matching an integer errno value.
Raise ValueError if no constant is defined for the current
operating system, or if the constant is not in the below list.
Example:
ErrnoToCode(2) -- errno::ENOENT - ErrorStr(code as Constant) as Str
-
Return an error message describing a symbolic error code (in English).
Return nil if no message is available for the code. Example:
ErrorStr(ENOENT) -- "No such file or directory"
Symbolic constants
Each of these symbolic constants represents a potential errno value. All of these are defined even if the corresponding errno value is not defined for the current operating system.
- E2BIG
- Argument list too long
- EACCES
- Permission denied
- EADDRINUSE
- Address in use
- EADDRNOTAVAIL
- Local address not available
- EAFNOSUPPORT
- Address family not supported
- EAGAIN
- Resource temporarily unavailable
- EBADF
- Bad file descriptor
- EBADFD
- File descriptor in bad state
- EBUSY
- Resource busy
- ECANCELED
- Operation canceled
- ECHILD
- No child processes
- ECOMM
- Communication error on send
- ECONNABORTED
- Connection aborted
- ECONNREFUSED
- Connection refused
- EDEADLK
- Resource deadlock avoided
- EDOM
- Domain error
- EEXIST
- File exists
- EFAULT
- Bad address
- EFBIG
- File too large
- EHOSTDOWN
- Host is down
- EHOSTUNREACH
- Host in unreachable
- EIDRM
- Identifier removed
- EILSEQ
- Illegal byte sequence
- EINPROGRESS
- Operation in progress
- EINTR
- Interrupted function call
- EINVAL
- Invalid argument
- EIO
- Input/output error
- EISCONN
- Socket is 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
- ENETUNREACH
- Network unreachable
- ENFILE
- Too many open files
- ENODEV
- No such device
- ENOENT
- No such file or directory
- ENOEXEC
- Exec format error
- ENOLCK
- No locks available
- ENOLINK
- Link has been severed
- ENOMEM
- Not enough space
- ENOMSG
- No message of the desired type
- ENONET
- Machine is not on the network
- ENOPROTOOPT
- Protocol not available
- ENOSPC
- No space left on device
- ENOSR
- No STREAM resources
- ENOSTR
- Not a STREAM
- ENOSYS
- Function not implemented
- ENOTCONN
- Socket is not connected
- ENOTDIR
- Not a directory
- ENOTEMPTY
- Directory not empty
- ENOTSOCK
- Not a socket
- ENOTSUP
- Operation not supported
- ENOTTY
- Inappropriate I/O control operation
- ENOTUNIQ
- Name not unique on network
- ENXIO
- No such device or address
- EOPNOTSUPP
- Operation not supported
- EOVERFLOW
- Value too large to be stored in data type
- EPERM
- Operation not permitted
- EPIPE
- Broken pipe
- EPROTO
- Protocol error
- EPROTONOSUPPORT
- Protocol not supported
- EPROTOTYPE
- Protocol wrong type for socket
- ERANGE
- Result too large
- ERESTART
- Interrupted system call should be restarted
- EROFS
- Read-only file system
- ESPIPE
- Invalid seek
- ESRCH
- No such process
- ESTALE
- Stale file handle
- ETIME
- Timer expired
- ETIMEDOUT
- Operation timed out
- ETXTBSY
- Text file busy
- EWOULDBLOCK
- Operation would block
- EXDEV
- Improper link