C Programming/string.h/strerror

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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 | edit source]

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

Reentrancy[edit | edit source]

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

Usage[edit | edit source]

Inclusion[edit | edit source]

#include <string.h>

Declaration[edit | edit source]

char* strerror(int errnum);

Semantics[edit | edit source]

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

See also[edit | edit source]

  • strerror r
  • perror

References[edit | edit source]

  1. strerror by OpenGroup

External links[edit | edit source]