Function name - brief description of the functionality

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#include < ... >
#include < ... >
      ...
Function syntax

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Description

Detailed description of the functionality and parameters.

Return value

List and description of all possible function return values.
Some functions have no return value. The “Return value” section is omitted in such cases and in the descriptions of external variables.

Errors indicated by errno

List and description of the error codes in the external variable errno that can occur with an invalid call or function. This section may be omitted.

Note

Description of terms or information on interaction with other functions, or tips for use. This section may be omitted.

See also

Cross references to function descriptions. This section may be omitted.