errno值（linux ）

#define EPERM
1 /* Operation not permitted */

#define ENOENT2
/* No such file or directory */

#define ESRCH
3 /* No such process */

#define EINTR
4 /* Interrupted system call */

#define EIO
5 /* I/O error */

#define ENXIO
6 /* No such device or address */

#define E2BIG
7 /* Argument list too long */

#define ENOEXEC8
/* Exec format error */

#define EBADF
9 /* Bad file number */

#define ECHILD10
/* No child processes */

#define EAGAIN11
/* Try again */

#define ENOMEM12
/* Out of memory */

#define EACCES13
/* Permission denied */

#define EFAULT14
/* Bad address */

#define ENOTBLK15
/* Block device required */

#define EBUSY
16 /* Device or resource busy */

#define EEXIST17
/* File exists */

#define EXDEV
18 /* Cross-device link */

#define ENODEV19
/* No such device */

#define ENOTDIR20
/* Not a directory */

#define EISDIR21
/* Is a directory */

#define EINVAL22
/* Invalid argument */

#define ENFILE23
/* File table overflow */

#define EMFILE24
/* Too many open files */

#define ENOTTY25
/* Not a typewriter */

#define ETXTBSY26
/* Text file busy */

#define EFBIG
27 /* File too large */

#define ENOSPC28
/* No space left on device */

#define ESPIPE29
/* Illegal seek */

#define EROFS
30 /* Read-only file system */

#define EMLINK31
/* Too many links */

#define EPIPE
32 /* Broken pipe */

#define EDOM
33 /* Math argument out of domain of func */

#define ERANGE34
/* Math result not representable */

#define EDEADLK
35 /* Resource deadlock would occur */

#define ENAMETOOLONG
36 /* File name too long */

#define ENOLCK
37 /* No record locks available */

#define ENOSYS
38 /* Function not implemented */

#define ENOTEMPTY
39 /* Directory not empty */

#define ELOOP
40 /* Too many symbolic links encountered */

#define EWOULDBLOCK
EAGAIN /* Operation would block */

#define ENOMSG
42 /* No message of desired type */

#define EIDRM
43 /* Identifier removed */

#define ECHRNG
44 /* Channel number out of range */

#define EL2NSYNC
45 /* Level 2 not synchronized */

#define EL3HLT
46 /* Level 3 halted */

#define EL3RST
47 /* Level 3 reset */

#define ELNRNG
48 /* Link number out of range */

#define EUNATCH
49 /* Protocol driver not attached */

#define ENOCSI
50 /* No CSI structure available */

#define EL2HLT
51 /* Level 2 halted */

#define EBADE
52 /* Invalid exchange */

#define EBADR
53 /* Invalid request descriptor */

#define EXFULL
54 /* Exchange full */

#define ENOANO
55 /* No anode */

#define EBADRQC
56 /* Invalid request code */

#define EBADSLT
57 /* Invalid slot */

#define EDEADLOCK
EDEADLK

#define EBFONT
59 /* Bad font file format */

#define ENOSTR
60 /* Device not a stream */

#define ENODATA
61 /* No data available */

#define ETIME
62 /* Timer expired */

#define ENOSR
63 /* Out of streams resources */

#define ENONET
64 /* Machine is not on the network */

#define ENOPKG
65 /* Package not installed */

#define EREMOTE
66 /* Object is remote */

#define ENOLINK
67 /* Link has been severed */

#define EADV
68 /* Advertise error */

#define ESRMNT
69 /* Srmount error */

#define ECOMM
70 /* Communication error on send */

#define EPROTO
71 /* Protocol error */

#define EMULTIHOP
72 /* Multihop attempted */

#define EDOTDOT
73 /* RFS specific error */

#define EBADMSG
74 /* Not a data message */

#define EOVERFLOW
75 /* Value too large for defined data type */

#define ENOTUNIQ
76 /* Name not unique on network */

#define EBADFD
77 /* File descriptor in bad state */

#define EREMCHG
78 /* Remote address changed */

#define ELIBACC
79 /* Can not access a needed shared library */

#define ELIBBAD
80 /* Accessing a corrupted shared library */

#define ELIBSCN
81 /* .lib section in a.out corrupted */

#define ELIBMAX
82 /* Attempting to link in too many shared libraries */

#define ELIBEXEC
83 /* Cannot exec a shared library directly */

#define EILSEQ
84 /* Illegal byte sequence */

#define ERESTART
85 /* Interrupted system call should be restarted */

#define ESTRPIPE
86 /* Streams pipe error */

#define EUSERS
87 /* Too many users */

#define ENOTSOCK
88 /* Socket operation on non-socket */

#define EDESTADDRREQ
89 /* Destination address required */

#define EMSGSIZE
90 /* Message too long */

#define EPROTOTYPE
91 /* Protocol wrong type for socket */

#define ENOPROTOOPT
92 /* Protocol not available */

#define EPROTONOSUPPORT
93 /* Protocol not supported */

#define ESOCKTNOSUPPORT
94 /* Socket type not supported */

#define EOPNOTSUPP
95 /* Operation not supported on transport endpoint */

#define EPFNOSUPPORT
96 /* Protocol family not supported */

#define EAFNOSUPPORT
97 /* Address family not supported by protocol */

#define EADDRINUSE
98 /* Address already in use */

#define EADDRNOTAVAIL
99 /* Cannot assign requested address */

#define ENETDOWN
100 /* Network is down */

#define ENETUNREACH
101 /* Network is unreachable */

#define ENETRESET
102 /* Network dropped connection because of reset */

#define ECONNABORTED
103 /* Software caused connection abort */

#define ECONNRESET
104 /* Connection reset by peer */

#define ENOBUFS
105 /* No buffer space available */

#define EISCONN
106 /* Transport endpoint is already connected */

#define ENOTCONN
107 /* Transport endpoint is not connected */

#define ESHUTDOWN
108 /* Cannot send after transport endpoint shutdown */

#define ETOOMANYREFS
109 /* Too many references: cannot splice */

#define ETIMEDOUT
110 /* Connection timed out */

#define ECONNREFUSED
111 /* Connection refused */

#define EHOSTDOWN
112 /* Host is down */

#define EHOSTUNREACH
113 /* No route to host */

#define EALREADY
114 /* Operation already in progress */

#define EINPROGRESS
115 /* Operation now in progress */

#define ESTALE
116 /* Stale NFS file handle */

#define EUCLEAN
117 /* Structure needs cleaning */

#define ENOTNAM
118 /* Not a XENIX named type file */

#define ENAVAIL
119 /* No XENIX semaphores available */

#define EISNAM
120 /* Is a named type file */

#define EREMOTEIO
121 /* Remote I/O error */

#define EDQUOT
122 /* Quota exceeded */

#define ENOMEDIUM
123 /* No medium found */

#define EMEDIUMTYPE
124 /* Wrong medium type */

#define ECANCELED
125 /* Operation Canceled */

#define ENOKEY
126 /* Required key not available */

#define EKEYEXPIRED
127 /* Key has expired */

#define EKEYREVOKED
128 /* Key has been revoked */

#define EKEYREJECTED
129 /* Key was rejected by service */

/* for robust mutexes */

#define EOWNERDEAD
130 /* Owner died */

#define ENOTRECOVERABLE
131 /* State not recoverable */

#define ERFKILL 132
/* Operation not possible due to RF-kill */

#define EHWPOISON 133
/* Memory page has hardware error */