errno.h File Reference

Detailed Description

#include <errno.h>

Some functions in the library set the global variable errno when an error occurs. The file, <errno.h>, provides symbolic names for various error codes.

Warning

The errno global variable is not safe to use in a threaded or multi-task system. A race condition can occur if a task is interrupted between the call which sets error and when the task examines errno. If another task changes errno during this time, the result will be incorrect for the interrupted task.

Definition in file errno.h.

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Variables
int	errno
	number of last error

Error numbers
#define	E2BIG   (1)
	Argument list too long.
#define	EACCES   (2)
	Permission denied.
#define	EADDRINUSE   (3)
	Address in use.
#define	EADDRNOTAVAIL   (4)
	Address not available.
#define	EAFNOSUPPORT   (5)
	Address family not supported.
#define	EAGAIN   (6)
	Resource unavailable, try again (may be the same value as [EWOULDBLOCK]).
#define	EALREADY   (7)
	Connection already in progress.
#define	EBADF   (8)
	Bad file descriptor.
#define	EBADMSG   (9)
	Bad message.
#define	EBUSY   (10)
	Device or resource busy.
#define	ECANCELED   (11)
	Operation canceled.
#define	ECHILD   (12)
	No child processes.
#define	ECONNABORTED   (13)
	Connection aborted.
#define	ECONNREFUSED   (14)
	Connection refused.
#define	ECONNRESET   (15)
	Connection reset.
#define	EDEADLK   (16)
	Resource deadlock would occur.
#define	EDESTADDRREQ   (17)
	Destination address required.
#define	EDOM   (18)
	Mathematics argument out of domain of function.
#define	EDQUOT   (19)
	Reserved.
#define	EEXIST   (20)
	File exists.
#define	EFAULT   (21)
	Bad address.
#define	EFBIG   (22)
	File too large.
#define	EHOSTUNREACH   (23)
	Host is unreachable.
#define	EIDRM   (24)
	Identifier removed.
#define	EILSEQ   (25)
	Illegal byte sequence.
#define	EINPROGRESS   (26)
	Operation in progress.
#define	EINTR   (27)
	Interrupted function.
#define	EINVAL   (28)
	Invalid argument.
#define	EIO   (29)
	I/O error.
#define	EISCONN   (30)
	Socket is connected.
#define	EISDIR   (31)
	Is a directory.
#define	ELOOP   (32)
	Too many levels of symbolic links.
#define	EMFILE   (33)
	File descriptor value too large.
#define	EMLINK   (34)
	Too many links.
#define	EMSGSIZE   (35)
	Message too large.
#define	EMULTIHOP   (36)
	Reserved.
#define	ENAMETOOLONG   (37)
	Filename too long.
#define	ENETDOWN   (38)
	Network is down.
#define	ENETRESET   (39)
	Connection aborted by network.
#define	ENETUNREACH   (40)
	Network unreachable.
#define	ENFILE   (41)
	Too many files open in system.
#define	ENOBUFS   (42)
	No buffer space available.
#define	ENODATA   (43)
	[OB XSR] [Option Start] No message is available on the STREAM head read queue. More...
#define	ENODEV   (44)
	No such device.
#define	ENOENT   (45)
	No such file or directory.
#define	ENOEXEC   (46)
	Executable file format error.
#define	ENOLCK   (47)
	No locks available.
#define	ENOLINK   (48)
	Reserved.
#define	ENOMEM   (49)
	Not enough space.
#define	ENOMSG   (50)
	No message of the desired type.
#define	ENOPROTOOPT   (51)
	Protocol not available.
#define	ENOSPC   (52)
	No space left on device.
#define	ENOSR   (53)
	[OB XSR] [Option Start] No STREAM resources. More...
#define	ENOSTR   (54)
	[OB XSR] [Option Start] Not a STREAM. More...
#define	ENOSYS   (55)
	Function not supported.
#define	ENOTCONN   (56)
	The socket is not connected.
#define	ENOTDIR   (57)
	Not a directory or a symbolic link to a directory.
#define	ENOTEMPTY   (58)
	Directory not empty.
#define	ENOTRECOVERABLE   (59)
	State not recoverable.
#define	ENOTSOCK   (60)
	Not a socket.
#define	ENOTSUP   (61)
	Not supported (may be the same value as [EOPNOTSUPP]).
#define	ENOTTY   (62)
	Inappropriate I/O control operation.
#define	ENXIO   (63)
	No such device or address.
#define	EOPNOTSUPP   (64)
	Operation not supported on socket (may be the same value as [ENOTSUP]).
#define	EOVERFLOW   (65)
	Value too large to be stored in data type.
#define	EOWNERDEAD   (66)
	Previous owner died.
#define	EPERM   (67)
	Operation not permitted.
#define	EPIPE   (68)
	Broken pipe.
#define	EPROTO   (69)
	Protocol error.
#define	EPROTONOSUPPORT   (70)
	Protocol not supported.
#define	EPROTOTYPE   (71)
	Protocol wrong type for socket.
#define	ERANGE   (72)
	Result too large.
#define	EROFS   (73)
	Read-only file system.
#define	ESPIPE   (74)
	Invalid seek.
#define	ESRCH   (75)
	No such process.
#define	ESTALE   (76)
	Reserved.
#define	ETIME   (77)
	[OB XSR] [Option Start] Stream ioctl() timeout. More...
#define	ETIMEDOUT   (78)
	Connection timed out.
#define	ETXTBSY   (79)
	Text file busy.
#define	EWOULDBLOCK   (80)
	Operation would block (may be the same value as [EAGAIN]).
#define	EXDEV   (81)
	Cross-device link.