在库函数中有个errno变量,每个errno值对应着以字符串表示的错误类型。
以下主要来自2.6.32的内核代码中的/usr/include/asm-generic/errno.h及errno-base.h,输出错误原因定义归纳整理如下,我们可以使用如下代码输出:
/************************************************
> File Name: 0.c
> Author: GatieMe
> Mail: ftcl@163.com
> Created Time: Sat 23 Jan 2016 12:07:51 AM CST
************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main(int argc, char ** argv)
{
int i = 0;
for(i = 0; i < 256; i++)
{
printf("| %02d | %s |\n", i, strerror(i));
}
return 0;
}
注意:
perror( ) 用来将上一个函数发生错误的原因输出到标准设备(stderr)。参数 s 所指的字符串会先打印出,后面再加上错误原因字符串。此错误原因依照全局变量errno 的值来决定要输出的字符串。
当你调用”某些”函数出错时,该函数已经重新设置了errno的值。perror函数只是将你输入的一些信息和现在的errno所对应的错误一起输出。
errno | 描述 |
---|---|
00 | Success |
01 | Operation not permitted |
02 | No such file or directory |
03 | No such process |
04 | Interrupted system call |
05 | Input/output error |
06 | No such device or address |
07 | Argument list too long |
08 | Exec format error |
09 | Bad file descriptor |
10 | No child processes |
11 | Resource temporarily unavailable |
12 | Cannot allocate memory |
13 | Permission denied |
14 | Bad address |
15 | Block device required |
16 | Device or resource busy |
17 | File exists |
18 | Invalid cross-device link |
19 | No such device |
20 | Not a directory |
21 | Is a directory |
22 | Invalid argument |
23 | Too many open files in system |
24 | Too many open files |
25 | Inappropriate ioctl for device |
26 | Text file busy |
27 | File too large |
28 | No space left on device |
29 | Illegal seek |
30 | Read-only file system |
31 | Too many links |
32 | Broken pipe |
33 | Numerical argument out of domain |
34 | Numerical result out of range |
35 | Resource deadlock avoided |
36 | File name too long |
37 | No locks available |
38 | Function not implemented |
39 | Directory not empty |
40 | Too many levels of symbolic links |
41 | Unknown error 41 |
42 | No message of desired type |
43 | Identifier removed |
44 | Channel number out of range |
45 | Level 2 not synchronized |
46 | Level 3 halted |
47 | Level 3 reset |
48 | Link number out of range |
49 | Protocol driver not attached |
50 | No CSI structure available |
51 | Level 2 halted |
52 | Invalid exchange |
53 | Invalid request descriptor |
54 | Exchange full |
55 | No anode |
56 | Invalid request code |
57 | Invalid slot |
58 | Unknown error 58 |
59 | Bad font file format |
60 | Device not a stream |
61 | No data available |
62 | Timer expired |
63 | Out of streams resources |
64 | Machine is not on the network |
65 | Package not installed |
66 | Object is remote |
67 | Link has been severed |
68 | Advertise error |
69 | Srmount error |
70 | Communication error on send |
71 | Protocol error |
72 | Multihop attempted |
73 | RFS specific error |
74 | Bad message |
75 | Value too large for defined data type |
76 | Name not unique on network |
77 | File descriptor in bad state |
78 | Remote address changed |
79 | Can not access a needed shared library |
80 | Accessing a corrupted shared library |
81 | .lib section in a.out corrupted |
82 | Attempting to link in too many shared libraries |
83 | Cannot exec a shared library directly |
84 | Invalid or incomplete multibyte or wide character |
85 | Interrupted system call should be restarted |
86 | Streams pipe error |
87 | Too many users |
88 | Socket operation on non-socket |
89 | Destination address required |
90 | Message too long |
91 | Protocol wrong type for socket |
92 | Protocol not available |
93 | Protocol not supported |
94 | Socket type not supported |
95 | Operation not supported |
96 | Protocol family not supported |
97 | Address family not supported by protocol |
98 | Address already in use |
99 | Cannot assign requested address |
100 | Network is down |
101 | Network is unreachable |
102 | Network dropped connection on reset |
103 | Software caused connection abort |
104 | Connection reset by peer |
105 | No buffer space available |
106 | Transport endpoint is already connected |
107 | Transport endpoint is not connected |
108 | Cannot send after transport endpoint shutdown |
109 | Too many references: cannot splice |
110 | Connection timed out |
111 | Connection refused |
112 | Host is down |
113 | No route to host |
114 | Operation already in progress |
115 | Operation now in progress |
116 | Stale NFS file handle |
117 | Structure needs cleaning |
118 | Not a XENIX named type file |
119 | No XENIX semaphores available |
120 | Is a named type file |
121 | Remote I/O error |
122 | Disk quota exceeded |
123 | No medium found |
124 | Wrong medium type |
125 | Operation canceled |
126 | Required key not available |
127 | Key has expired |
128 | Key has been revoked |
129 | Key was rejected by service |
130 | Owner died |
131 | State not recoverable |
132~ | Unknown error |