check errno

Introduction: Header file errno. h defines a Global Macro errno, Which is expanded into an int type "Left value", which means that the macro errno is not necessarily an object identifier, it can also be expanded into a "Left value" that can be

There are three types of error reporting usages in the C language standard library.1, errnoerrno is defined in the header file as follows #ifndef errno extern int errno; #endif An external variable errno an implementation-defined

Errno (Error Report) usage in C language, errno Error Report There are three forms of error reporting in the C language standard library. 1,Errno Errno is defined in the header file, as follows: #ifndef errnoextern int errno;#endif The external

When there is an exception to the C API function in Linux, generally will errno variable (need include errno.h) to assign an integer value, different values to represent different meanings, you can see the value of the reason for the error, in the

Ifndef _i386_errno_h#define _i386_errno_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 *

Error log 2015-05-16 12:22:03 3325 [note]-' 0.0.0.0 ' resolves to ' 0.0.0.0 '; 2015-05-16 12:22:03 3325 [note] Server socket created on IP: ' 0.0.0.0 '.2015-05-16 12:22:03 3325 [ERROR]/usr/sbin/mysqld:can ' t find file:

errno is thread-safe under Linux 2011-06-20 11:34:54 Category: Linux in Linux or UNIX environments, errno is a very important part. When there is a problem with the called function, we can determine the cause of the error by errno value, which

Transferred from: http://baike.baidu.com/link?url=uX-q7K-TTL-5AFNT-hjhAP6fvgAwvsNkIMqJqJ3GEspYgtQXsovEEzpqmQ3ZmAgql2uG3LluUetAp8uKTm3z5qErrno is the last error code for the recording system. The code is a value of type int, defined in

In Linux or UNIX environments, errno is a very important part. When the called function encounters a problem, we can use the errno value to determine the cause of the Error. This will involve a problem, that is, how to ensure the security of errno

In Linux or UNIX environments, errno is a very important part. When there is a problem with the called function, we can determine the cause of the error by errno value, which involves a problem, that is, how to ensure that the errno in