【C】【LINUX】Linux errno 错误号码与对应消息

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errno 与对应消息

  1: Operation not permitted
  2: No such file or directory
  3: No such process
  4: Interrupted system call
  5: Input/output error
  6: No such device or address
  7: Argument list too long
  8: Exec format error
  9: 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 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: Operation not possible due to RF-kill
133: Memory page has hardware error
134: Unknown error 134
...: Unknown error ...

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简单的打印错误消息代码

#include <stdio.h>
#include <errno.h>

void know_about_errno_msg() {
    int i = 0;
    char buf[256] = {'\0'};
    while (i++ < 255) {  // 跳过 0，0 是执行成功的返回值
        errno = i;
        snprintf(buf, 255, "%3d", i);
        perror(buf);
        memset(buf, '\0', 256);
    }
    return;
}

int main()
{
    know_about_errno_msg();
    return 0;
}

save as print-errno.c file.

execute:

$ gcc print-errno.c && ./a.out
...

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