RAD Studio |  |

errno (C Runtime Library Reference)

Header File

errno.h

Syntax

extern int errno;

Description

errno is used by perror to print error messages when certain library routines fail to accomplish their appointed tasks.

When an error in a math or system call occurs, errno is set to indicate the type of error. Sometimes errno and _doserrno are equivalent. At other times, errno does not contain the actual operating system error code, which is contained in _doserrno. Still other errors might occur that set only errno, not _doserrno.

Copyright(C) 2009 Embarcadero Technologies, Inc. All Rights Reserved.
What do you think about this topic? Send feedback!