Linux errno.h文件

00001 /* The header defines the numbers of the various errors that can
00002 * occur during program execution. They are visible to user programs and
00003 * should be small positive integers. However, they are also used within
00004 * MINIX, where they must be negative. For example, the READ system call is
00005 * executed internally by calling do_read(). This function returns either a
00006 * (negative) error number or a (positive) number of bytes actually read.
00007 *
00008 * To solve the problem of having the error numbers be negative inside the
00009 * the system and positive outside, the following mechanism is used. All the
00010 * definitions are are the form:
00011 *
00012 * #define EPERM (_SIGN 1)
00013 *
00014 * If the macro _SYSTEM is defined, then _SIGN is set to "-", otherwise it is
00015 * set to "". Thus when compiling the operating system, the macro _SYSTEM
00016 * will be defined, setting EPERM to (- 1), whereas when when this
00017 * file is included in an ordinary user program, EPERM has the value ( 1).
00018 */
00019
00020 #ifndef _ERRNO_H /* check if is already included */
#define _ERRNO_H /* it is not included; note that fact */
00022
00023 /* Now define _SIGN as "" or "-" depending on _SYSTEM. */
00024 #ifdef _SYSTEM
00025 # define _SIGN -
00026 # define OK 0
00027 #else
# define _SIGN
00029 #endif
00030
00031 extern int ; /* place where the error numbers go */
00032
00033 /* Here are the numerical values of the error numbers. */
#define _NERROR 70 /* number of errors */
00035
#define EGENERIC (_SIGN 99) /* generic error */
#define EPERM (_SIGN 1) /* operation not permitted */
#define ENOENT (_SIGN 2) /* no such file or directory */
#define ESRCH (_SIGN 3) /* no such process */
#define EINTR (_SIGN 4) /* interrupted function call */
#define EIO (_SIGN 5) /* input/output error */
#define ENXIO (_SIGN 6) /* no such device or address */
#define E2BIG (_SIGN 7) /* arg list too long */
#define ENOEXEC (_SIGN 8) /* exec format error */
#define EBADF (_SIGN 9) /* bad file descriptor */
#define ECHILD (_SIGN 10) /* no child process */
#define EAGAIN (_SIGN 11) /* resource temporarily unavailable */
#define ENOMEM (_SIGN 12) /* not enough space */
#define EACCES (_SIGN 13) /* permission denied */
#define EFAULT (_SIGN 14) /* bad address */
#define ENOTBLK (_SIGN 15) /* Extension: not a block special file */
#define EBUSY (_SIGN 16) /* resource busy */
#define EEXIST (_SIGN 17) /* file exists */
#define EXDEV (_SIGN 18) /* improper link */
#define ENODEV (_SIGN 19) /* no such device */
#define ENOTDIR (_SIGN 20) /* not a directory */
#define EISDIR (_SIGN 21) /* is a directory */
#define EINVAL (_SIGN 22) /* invalid argument */
#define ENFILE (_SIGN 23) /* too many open files in system */
#define EMFILE (_SIGN 24) /* too many open files */
#define ENOTTY (_SIGN 25) /* inappropriate I/O control operation */
#define ETXTBSY (_SIGN 26) /* no longer used */
#define EFBIG (_SIGN 27) /* file too large */
#define ENOSPC (_SIGN 28) /* no space left on device */
#define ESPIPE (_SIGN 29) /* invalid seek */
#define EROFS (_SIGN 30) /* read-only file system */
#define EMLINK (_SIGN 31) /* too many links */
#define EPIPE (_SIGN 32) /* broken pipe */
#define EDOM (_SIGN 33) /* domain error (from ANSI C std) */
#define ERANGE (_SIGN 34) /* result too large (from ANSI C std) */
#define EDEADLK (_SIGN 35) /* resource deadlock avoided */
#define ENAMETOOLONG (_SIGN 36) /* file name too long */
#define ENOLCK (_SIGN 37) /* no locks available */
#define ENOSYS (_SIGN 38) /* function not implemented */
#define ENOTEMPTY (_SIGN 39) /* directory not empty */
#define ELOOP (_SIGN 40) /* too many levels of symlinks detected */
00077
00078 /* The following errors relate to networking. */
#define EPACKSIZE (_SIGN 50) /* invalid packet size for some protocol */
#define EOUTOFBUFS (_SIGN 51) /* not enough buffers left */
#define EBADIOCTL (_SIGN 52) /* illegal ioctl for device */
#define EBADMODE (_SIGN 53) /* badmode in ioctl */
#define EWOULDBLOCK (_SIGN 54)
#define EBADDEST (_SIGN 55) /* not a valid destination address */
#define EDSTNOTRCH (_SIGN 56) /* destination not reachable */
#define EISCONN (_SIGN 57) /* all ready connected */
#define EADDRINUSE (_SIGN 58) /* address in use */
#define ECONNREFUSED (_SIGN 59) /* connection refused */
#define ECONNRESET (_SIGN 60) /* connection reset */
#define ETIMEDOUT (_SIGN 61) /* connection timed out */
#define EURG (_SIGN 62) /* urgent data present */
#define ENOURG (_SIGN 63) /* no urgent data present */
#define ENOTCONN (_SIGN 64) /* no connection (yet or anymore) */
#define ESHUTDOWN (_SIGN 65) /* a write call to a shutdown connection */
#define ENOCONN (_SIGN 66) /* no such connection */
#define EAFNOSUPPORT (_SIGN 67) /* address family not supported */
#define EPROTONOSUPPORT (_SIGN 68) /* protocol not supported by AF */
#define EPROTOTYPE (_SIGN 69) /* Protocol wrong type for socket */
#define EINPROGRESS (_SIGN 70) /* Operation now in progress */
#define EADDRNOTAVAIL (_SIGN 71) /* Can't assign requested address */
#define EALREADY (_SIGN 72) /* Connection already in progress */
#define EMSGSIZE (_SIGN 73) /* Message too long */
#define ENOTSOCK (_SIGN 74) /* Socket operation on non-socket */
#define ENOPROTOOPT (_SIGN 75) /* Protocol not available */
00105
00106 /* The following are not POSIX errors, but they can still happen.
00107 * All of these are generated by the kernel and relate to message passing.
00108 */
#define ELOCKED (_SIGN 101) /* can't send message due to deadlock */
#define EBADCALL (_SIGN 102) /* illegal system call number */
#define EBADSRCDST (_SIGN 103) /* bad source or destination process */
#define ECALLDENIED (_SIGN 104) /* no permission for system call */
#define EDEADSRCDST (_SIGN 105) /* source or destination is not alive */
#define ENOTREADY (_SIGN 106) /* source or destination is not ready */
#define EBADREQUEST (_SIGN 107) /* destination cannot handle request */
#define ESRCDIED (_SIGN 108) /* source just died */
#define EDSTDIED (_SIGN 109) /* destination just died */
#define ETRAPDENIED (_SIGN 110) /* IPC trap not allowed */
#define EDONTREPLY (_SIGN 201) /* pseudo-code: don't send a reply */
00120
00121 #endif /* _ERRNO_H */