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# sasl_chalprompt_t - Realm acquisition callback

## Synopsis

    #include <sasl/prop.h>

    int sasl_chalprompt_t(void *context, int id,
        const char *challenge,
        const char *prompt, const char *defresult,
        const char **result, unsigned *len)

## Description

`int sasl_chalprompt_t(void *context,`
`int id,`
`const char *challenge,`
`const char *prompt,`
`const char *defresult,`
`const char **result,`
`unsigned *len)`

  sasl_chalprompt_t is used to prompt for input in response to a server challenge.

  Parameters:

  - context – is the context from the callback record
  - id – is the callback id (either SASL_CB_ECHOPROMPT or SASL_CB_NOECHOPROMPT)
  - challenge – the server’s challenge
  - prompt – A prompt for the user
  - defresult – Default result (may be NULL)
  - len – Length of the user’s response.

  Result: | The user’s response (a NUL terminated string) or SASL error code.

## Return Value

The user’s response (NUL terminated), or a SASL error code. See sasl_errors(3).

## See Also

sasl(3), sasl_errors(3), sasl_callbacks(3)