linux常见错误码
查看错误代码errno是调试程序的一个重要方法。当linuc C api函数发生异常时,一般会将errno变量(需include errno.h)赋一个整数值,不同的值表示不同的含义,可以通过查看该值推测出错的原因。在实际编程中用这一招解决了不少原本看来莫名其妙的问题。比较麻烦的是每次都要去linux源代码里面查找错误代码的含义，现在把它贴出来，以后需要查时就来这里看了。
1-34号错误号是在内核源码的include/asm-generic/errno-base.h定义
35-132则是在include/asm-generic/errno.h中定义
剩下还有一些更大的错误号是留给内核级别的，如系统调用等，
用户程序一般是看不见的这些号的，
Ubuntu9.10中/usr/src/linux-headers-2.6.31-21-generic/include/linux/errno.h
#ifndef _ASM_GENERIC_ERRNO_BASE_H #define _ASM_GENERIC_ERRNO_BASE_H
#define
EPERM
1
/＊ Operation not permitted ＊/ #define
ENOENT
2
/＊ 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
ENOEXEC
8
/＊ Exec format error ＊/ #define
EBADF
9
/＊ Bad file number ＊/ #define
ECHILD
10
/＊ No child processes ＊/ #define
EAGAIN
11
/＊ Try again ＊/ #define
ENOMEM
12
/＊ Out of memory ＊/ #define
EACCES
13
/＊ Permission denied ＊/ #define
EFAULT
14
/＊ Bad address ＊/ #define
ENOTBLK
15
/＊ Block device required ＊/ #define
EBUSY
16
/＊ Device or resource busy ＊/ #define
EEXIST
17
/＊ File exists ＊/ #define
EXDEV
18
/＊ Cross-device link ＊/ #define
ENODEV
19
/＊ No such device ＊/ #define
ENOTDIR
20
/＊ Not a directory ＊/ #define
EISDIR
21
/＊ Is a directory ＊/ #define
EINVAL
22
/＊ Invalid argument ＊/ #define
ENFILE
23
/＊ File table overflow ＊/ #define
EMFILE
24
/＊ Too many open files ＊/ #define
ENOTTY
25
/＊ Not a typewriter ＊/ #define
ETXTBSY
26
/＊ Text file busy ＊/ #define
EFBIG
27
/＊ File too large ＊/ #define
ENOSPC
28
/＊ No space left on device ＊/ #define
ESPIPE
29
/＊ Illegal seek ＊/ #define
EROFS
30
/＊ Read-only file system ＊/ #define
EMLINK
31
/＊ Too many links ＊/ #define
EPIPE
32
/＊ Broken pipe ＊/ #define
EDOM
33
/＊ Math argument out of domain of func ＊/ #define
ERANGE
34
/＊ Math result not representable ＊/
#endif
#include <asm-generic/errno-base.h>
#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 ＊/
#ifdef __KERNEL__
/＊
＊ These should never be seen by user programs. To return one of ERESTART＊
＊ codes, signal_pending() MUST be set. Note that ptrace can observe these
＊ at syscall exit tracing, but they will never be left for the debugged user
＊ process to see.
＊/ #define ERESTARTSYS
512 #define ERESTARTNOINTR
513 #define ERESTARTNOHAND
514
/＊ restart if no handler.. ＊/ #define ENOIOCTLCMD
515
/＊ No ioctl command ＊/ #define ERESTART_RESTARTBLOCK 516 /＊ restart by calling sys_restart_syscall ＊/
/＊ Defined for the NFSv3 protocol ＊/ #define EBADHANDLE
521
/＊ Illegal NFS file handle ＊/ #define ENOTSYNC
522
/＊ Update synchronization mismatch ＊/ #define EBADCOOKIE
523
/＊ Cookie is stale ＊/ #define ENOTSUPP
524
/＊ Operation is not supported ＊/ #define ETOOSMALL
525
/＊ Buffer or request is too small ＊/ #define ESERVERFAULT
526
/＊ An untranslatable error occurred ＊/ #define EBADTYPE
527
/＊ Type not supported by server ＊/ #define EJUKEBOX
528
/＊ Request initiated, but will not complete before timeout ＊/ #define EIOCBQUEUED
529
/＊ iocb queued, will get completion event ＊/ #define EIOCBRETRY
530
/＊ iocb queued, will trigger a retry ＊/
#endif
