C Programming/string.h/strerror

The string-error function, strerror, is a C/C++ function which translates an error code, usually stored in the global variable errno, to a human-readable error message.

History edit

The strerror function is defined in IEEE Std 1003.1, also known as POSIX 1.

Reentrancy edit

The strerror function is not reentrant. For a reentrant version of the function, see strerror r.

Usage edit

Inclusion edit

#include <string.h>

Declaration edit

char* strerror(int errnum);

Semantics edit

The function generates and reports a C-style string, containing an error message derived from the error code passed in with errnum.

References edit

strerror by OpenGroup

External links edit

C++ reference for std::strerror