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+
+# Errnos
+
+ EPERM Operation not permitted. An attempt was made to perform an oper-
+ ation limited to processes with appropriate privileges or to the
+ owner of a file or other resources.
+
+ ENOENT No such file or directory. A component of a specified pathname
+ did not exist, or the pathname was an empty string.
+
+ ESRCH No such process. No process could be found corresponding to that
+ specified by the given process ID.
+
+ EINTR Interrupted function call. An asynchronous signal (such as
+ SIGINT or SIGQUIT) was caught by the process during the execution
+ of an interruptible function. If the signal handler performs a
+ normal return, the interrupted function call will seem to have
+ returned the error condition.
+
+ EIO Input/output error. Some physical input or output error occurred.
+ This error will not be reported until a subsequent operation on
+ the same file descriptor and may be lost (over written) by any
+ subsequent errors.
+
+ ENXIO Device not configured. Input or output on a special file
+ referred to a device that did not exist, or made a request beyond
+ the limits of the device. This error may also occur when, for
+ example, a tape drive is not online or no disk pack is loaded on
+ a drive.
+
+ E2BIG Arg list too long. The number of bytes used for the argument and
+ environment list of the new process exceeded the current limit of
+ 2**18 bytes (ARG_MAX in <sys/syslimits.h>).
+
+ ENOEXEC Exec format error. A request was made to execute a file that,
+ although it has the appropriate permissions, was not in the for-
+ mat required for an executable file.
+
+ EBADF Bad file descriptor. A file descriptor argument was out of
+ range, referred to no open file, had been revoked by revoke(2),
+ or a read(2) (or write(2)) request was made to a file that was
+ only open for writing (or reading).
+
+ ECHILD No child processes. A wait(2) or waitpid(2) function was exe-
+ cuted by a process that had no existing or unwaited-for child
+ processes.
+
+ EDEADLK Resource deadlock avoided. An attempt was made to lock a sys-
+ tem resource that would have resulted in a deadlock situation.
+
+ ENOMEM Cannot allocate memory. The new process image required more
+ memory than was allowed by the hardware or by system-imposed mem-
+ ory management constraints. A lack of swap space is normally
+ temporary; however, a lack of core is not. Soft limits may be
+ increased to their corresponding hard limits.
+
+ EACCES Permission denied. An attempt was made to access a file in a
+ way forbidden by its file access permissions.
+
+ EFAULT Bad address. The system detected an invalid address in
+ attempting to use an argument of a call. The reliable detection
+ of this error cannot be guaranteed and when not detected may
+ result in the generation of a signal, indicating an address vio-
+ lation, which is sent to the process.
+
+ ENOTBLK Block device required. A block device operation was attempted
+ on a non-block device or file.
+
+ EBUSY Resource busy. An attempt to use a system resource which was in
+ use at the time in a manner which would have conflicted with the
+ request.
+
+ EEXIST File exists. An existing file was mentioned in an inappropri-
+ ate context, for instance, as the new link name in a link(2)
+ function.
+
+ EXDEV Improper link. A hard link to a file on another file system was
+ attempted.
+
+ ENODEV Operation not supported by device. An attempt was made to
+ apply an inappropriate function to a device, for example, trying
+ to read a write-only device such as a printer.
+
+ ENOTDIR Not a directory. A component of the specified pathname
+ existed, but it was not a directory, when a directory was
+ expected.
+
+ EISDIR Is a directory. An attempt was made to open a directory with
+ write mode specified.
+
+ EINVAL Invalid argument. Some invalid argument was supplied. (For
+ example, specifying an undefined signal to a signal(3) or kill(2)
+ function).
+
+ ENFILE Too many open files in system. Maximum number of file descrip-
+ tors allowable on the system has been reached and a requests for
+ an open cannot be satisfied until at least one has been closed.
+
+ EMFILE Too many open files. <As released, the limit on the number of
+ open files per process is 64.> The getrlimit(2) call with the
+ RLIMIT_NOFILE resource will obtain the current limit.
+
+ ENOTTY Inappropriate ioctl for device. A control function (see
+ ioctl(2)) was attempted for a file or special device for which
+ the operation was inappropriate.
+
+ ETXTBSY Text file busy. The new process was a pure procedure (shared
+ text) file which was open for writing by another process, or
+ while the pure procedure file was being executed an open(2) call
+ requested write access.
+
+ EFBIG File too large. The size of a file exceeded the maximum. (The
+ system-wide maximum file size is 2**63 bytes. Each file system
+ may impose a lower limit for files contained within it).
+
+ ENOSPC Device out of space. A write(2) to an ordinary file, the cre-
+ ation of a directory or symbolic link, or the creation of a
+ directory entry failed because no more disk blocks were available
+ on the file system, or the allocation of an inode for a newly
+ created file failed because no more inodes were available on the
+ file system.
+
+ ESPIPE Illegal seek. An lseek(2) function was issued on a socket,
+ pipe or FIFO.
+
+ EROFS Read-only file system. An attempt was made to modify a file or
+ directory was made on a file system that was read-only at the
+ time.
+
+ EMLINK Too many links. The number of hard links to a single file has
+ exceeded the maximum. (The system-wide maximum number of hard
+ links is 32767. Each file system may impose a lower limit for
+ files contained within it).
+
+ EPIPE Broken pipe. A write on a pipe, socket or FIFO for which there
+ is no process to read the data.
+
+ EDOM Numerical argument out of domain. A numerical input argument was
+ outside the defined domain of the mathematical function.
+
+ ERANGE Result too large or too small. The result of the function is
+ too large or too small to be represented in the available space.
+
+ EAGAIN Resource temporarily unavailable. This is a temporary condi-
+ tion and later calls to the same routine may complete normally.
+
+ EINPROGRESS Operation now in progress. An operation that takes a long
+ time to complete (such as a connect(2)) was attempted on a non-
+ blocking object (see fcntl(2)).
+
+ EALREADY Operation already in progress. An operation was attempted on
+ a non-blocking object that already had an operation in progress.
+
+ ENOTSOCK Socket operation on non-socket. Self-explanatory.
+
+ EDESTADDRREQ Destination address required. A required address was
+ omitted from an operation on a socket.
+
+ EMSGSIZE Message too long. A message sent on a socket was larger than
+ the internal message buffer or some other network limit.
+
+ EPROTOTYPE Protocol wrong type for socket. A protocol was specified
+ that does not support the semantics of the socket type requested.
+ For example, you cannot use the ARPA Internet UDP protocol with
+ type SOCK_STREAM.
+
+ ENOPROTOOPT Protocol option not available. A bad option or level was
+ specified in a getsockopt(2) or setsockopt(2) call.
+
+ EPROTONOSUPPORT Protocol not supported. The protocol has not been
+ configured into the system or no implementation for it exists.
+
+ ESOCKTNOSUPPORT Socket type not supported. The support for the socket
+ type has not been configured into the system or no implementation
+ for it exists.
+
+ EOPNOTSUPP Operation not supported. The attempted operation is not
+ supported for the type of object referenced. Usually this occurs
+ when a file descriptor refers to a file or socket that cannot
+ support this operation, for example, trying to accept a connec-
+ tion on a datagram socket.
+
+ EPFNOSUPPORT Protocol family not supported. The protocol family has
+ not been configured into the system or no implementation for it
+ exists.
+
+ EAFNOSUPPORT Address family not supported by protocol family. An
+ address incompatible with the requested protocol was used. For
+ example, you shouldn't necessarily expect to be able to use NS
+ addresses with ARPA Internet protocols.
+
+ EADDRINUSE Address already in use. Only one usage of each address is
+ normally permitted.
+
+ EADDRNOTAVAIL Cannot assign requested address. Normally results from
+ an attempt to create a socket with an address not on this
+ machine.
+
+ ENETDOWN Network is down. A socket operation encountered a dead net-
+ work.
+
+ ENETUNREACH Network is unreachable. A socket operation was attempted
+ to an unreachable network.
+
+ ENETRESET Network dropped connection on reset. The host you were con-
+ nected to crashed and rebooted.
+
+ ECONNABORTED Software caused connection abort. A connection abort was
+ caused internal to your host machine.
+
+ ECONNRESET Connection reset by peer. A connection was forcibly closed
+ by a peer. This normally results from a loss of the connection
+ on the remote socket due to a timeout or a reboot.
+
+ ENOBUFS No buffer space available. An operation on a socket or pipe
+ was not performed because the system lacked sufficient buffer
+ space or because a queue was full.
+
+ EISCONN Socket is already connected. A connect(2) request was made on
+ an already connected socket; or, a sendto(2) or sendmsg(2)
+ request on a connected socket specified a destination when
+ already connected.
+
+ ENOTCONN Socket is not connected. An request to send or receive data
+ was disallowed because the socket was not connected and (when
+ sending on a datagram socket) no address was supplied.
+
+ ESHUTDOWN Cannot send after socket shutdown. A request to send data
+ was disallowed because the socket had already been shut down with
+ a previous shutdown(2) call.
+
+ ETOOMANYREFS Too many references: can't splice. The resource is used
+ up to capacity.
+
+ ETIMEDOUT Operation timed out. A connect(2) or send(2) request failed
+ because the connected party did not properly respond after a
+ period of time. (The timeout period is dependent on the communi-
+ cation protocol).
+
+ ECONNREFUSED Connection refused. No connection could be made because
+ the target machine actively refused it. This usually results
+ from trying to connect to a service that is inactive on the for-
+ eign host.
+
+ ELOOP Too many levels of symbolic links. A path name lookup involved
+ more than 32 (MAXSYMLINKS) symbolic links.
+
+ ENAMETOOLONG File name too long. A component of a path name exceeded
+ 255 (MAXNAMELEN) characters, or an entire path name exceeded 1023
+ (MAXPATHLEN-1) characters.
+
+ EHOSTDOWN Host is down. A socket operation failed because the desti-
+ nation host was down.
+
+ EHOSTUNREACH No route to host. A socket operation was attempted to an
+ unreachable host.
+
+ ENOTEMPTY Directory not empty. A directory with entries other than
+ `.' and `..' was supplied to a remove directory or rename call.
+
+ EPROCLIM Too many processes.
+
+ EUSERS Too many users. The quota system ran out of table entries.
+
+ EDQUOT Disc quota exceeded. A write(2) to an ordinary file, the cre-
+ ation of a directory or symbolic link, or the creation of a
+ directory entry failed because the user's quota of disk blocks
+ was exhausted, or the allocation of an inode for a newly created
+ file failed because the user's quota of inodes was exhausted.
+
+ ESTALE Stale NFS file handle. An attempt was made to access an open
+ file (on an NFS filesystem) which is now unavailable as refer-
+ enced by the file descriptor. This may indicate the file was
+ deleted on the NFS server or some other catastrophic event
+ occurred.
+
+ EREMOTE Too many levels of remote in path. NFS version 3 RPC return
+ code 71.
+
+ EBADRPC RPC struct is bad. Exchange of RPC information was unsuccess-
+ ful.
+
+ ERPCMISMATCH RPC version wrong. The version of RPC on the remote peer
+ is not compatible with the local version.
+
+ EPROGUNAVAIL RPC prog. not avail. The requested program is not regis-
+ tered on the remote host.
+
+ EPROGMISMATCH Program version wrong. The requested version of the
+ program is not available on the remote host (RPC).
+
+ EPROCUNAVAIL Bad procedure for program. An RPC call was attempted for
+ a procedure which doesn't exist in the remote program.
+
+ ENOLCK No locks available. A system-imposed limit on the number of
+ simultaneous file locks was reached.
+
+ ENOSYS Function not implemented. Attempted a system call that is not
+ available on this system.
+
+ EFTYPE Inappropriate file type or format. Attempted a file operation
+ on a file of a type for which it was invalid.
+
+ EAUTH Authentication error. Attempted to use an invalid authentica-
+ tion ticket to mount an NFS filesystem.
+
+ ENEEDAUTH Need authenticator. An authentication ticket must be
+ obtained before the given NFS filesystem may be mounted.
+
+ EIDRM Identifier removed. An IPC identifier was removed while the
+ current process was waiting on it.
+
+ ENOMSG No message of the desired type. An IPC message queue does not
+ contain a message of the desired type, or a message catalog does
+ not contain the requested message.
+
+ EOVERFLOW Value too large to be stored in data type. A numerical
+ result of the function was too large to be stored in the caller-
+ provided space.
+
+ EILSEQ Illegal byte sequence. A wide character/multibyte character
+ encoding error occurred.
+
+ ENOTSUP Not supported. An attempt was made to set or change a parame-
+ ter to an unsupported value.
+
+ ECANCELED Operation canceled. The requested operation was canceled.
+
+ EBADMSG Bad or corrupt message. A message in the specified message
+ catalog did not satisfy implementation defined criteria, or a
+ STREAMS operation encountered an invalid message or a file
+ descriptor at the STREAM head.
+
+ ENODATA No message available. No message is available on the STREAM
+ head read queue
+
+ ENOSR No STREAM resources. Buffers could not be allocated due to
+ insufficient STREAMs memory resources.
+
+ ENOSTR Not a STREAM. A STREAM is not associated with the specified
+ file descriptor.
+
+ ETIME STREAM ioctl timeout. The timer set for a STREAMS ioctl(2)
+ operation has expired.
+
+ ENOATTR Attribute not found. The specified extended attribute does
+ not exist.
+
+ EMULTIHOP Multihop attempted. Components of path require hopping to
+ multiple remote machines and the file system does not allow it.
+ It occurs when users try to access remote resources which are not
+ directly accessible.
+
+ ENOLINK Link has been severed. Occurs when the link (virtual circuit)
+ connecting to a remote machine is gone.
+
+ EPROTO Protocol error. Some protocol error occurred. This error is
+ device-specific, but is generally not related to a hardware fail-
+ ure.
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