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krb5_vset_error_string

BSD mandoc
HEIMDAL

NAME

krb5_abort krb5_abortx krb5_clear_error_string krb5_err krb5_errx krb5_free_error_string krb5_get_err_text krb5_get_error_message krb5_get_error_string krb5_have_error_string krb5_set_error_string krb5_set_warn_dest krb5_get_warn_dest krb5_vabort krb5_vabortx krb5_verr krb5_verrx krb5_vset_error_string krb5_vwarn krb5_vwarnx krb5_warn krb5_warnx - Heimdal warning and error functions

LIBRARY

Kerberos 5 Library (libkrb5, -lkrb5)

SYNOPSIS

In krb5.h Ft krb5_error_code Fn krb5_abort krb5_context context krb5_error_code code const char *fmt ... Ft krb5_error_code Fn krb5_abortx krb5_context context krb5_error_code code const char *fmt ... Ft void Fn krb5_clear_error_string krb5_context context Ft krb5_error_code Fn krb5_err krb5_context context int eval krb5_error_code code const char *format ... Ft krb5_error_code Fn krb5_errx krb5_context context int eval const char *format ... Ft void Fn krb5_free_error_string krb5_context context char *str Ft krb5_error_code Fn krb5_verr krb5_context context int eval krb5_error_code code const char *format va_list ap Ft krb5_error_code Fn krb5_verrx krb5_context context int eval const char *format va_list ap Ft krb5_error_code Fn krb5_vset_error_string krb5_context context const char *fmt va_list args Ft krb5_error_code Fn krb5_vwarn krb5_context context krb5_error_code code const char *format va_list ap Ft krb5_error_code Fn krb5_vwarnx krb5_context context const char *format va_list ap Ft krb5_error_code Fn krb5_warn krb5_context context krb5_error_code code const char *format ... Ft krb5_error_code Fn krb5_warnx krb5_context context const char *format ... Ft krb5_error_code Fn krb5_set_error_string krb5_context context const char *fmt ... Ft krb5_error_code Fn krb5_set_warn_dest krb5_context context krb5_log_facility *facility Ft char * Ft krb5_log_facility * Fo krb5_get_warn_dest Fa krb5_context context Fc Fn krb5_get_err_text krb5_context context krb5_error_code code Ft char* Fn krb5_get_error_string krb5_context context Ft char* Fn krb5_get_error_message krb5_context context, krb5_error_code code Ft krb5_boolean Fn krb5_have_error_string krb5_context context Ft krb5_error_code Fn krb5_vabortx krb5_context context const char *fmt va_list ap Ft krb5_error_code Fn krb5_vabort krb5_context context const char *fmt va_list ap

DESCRIPTION

These functions print a warning message to some destination. Fa format is a printf style format specifying the message to print. The forms not ending in an ``x'' print the error string associated with Fa code along with the message. The ``err'' functions exit with exit status Fa eval after printing the message.

Applications that want to get the error message to report it to a user or store it in a log want to use Fn krb5_get_error_message .

The Fn krb5_set_warn_func function sets the destination for warning messages to the specified Fa facility . Messages logged with the ``warn'' functions have a log level of 1, while the ``err'' functions log with level 0.

Fn krb5_get_err_text fetches the human readable strings describing the error-code.

Fn krb5_abort and krb5_abortx behaves like krb5_err and krb5_errx but instead of exiting using the exit(3) call, abort(3) is used.

Fn krb5_free_error_string frees the error string Fa str returned by Fn krb5_get_error_string .

Fn krb5_clear_error_string clears the error string from the Fa context .

Fn krb5_set_error_string and Fn krb5_vset_error_string sets an verbose error string in Fa context .

Fn krb5_get_error_string fetches the error string from Fa context . The error message in the context is consumed and must be freed using Fn krb5_free_error_string by the caller. See also Fn krb5_get_error_message , what is usually less verbose to use.

Fn krb5_have_error_string returns TRUE if there is a verbose error message in the Fa context .

Fn krb5_get_error_message fetches the error string from the context, or if there is no customized error string in Fa context , uses Fa code to return a error string. In either case, the error message in the context is consumed and must be freed using Fn krb5_free_error_string by the caller.

Fn krb5_set_warn_dest and Fn krb5_get_warn_dest sets and get the log context that is used by Fn krb5_warn and friends. By using this the application can control where the output should go. For example, this is imperative to inetd servers where logging status and error message will end up on the output stream to the client.

EXAMPLES

Below is a simple example how to report error messages from the Kerberos library in an application.

 #include <krb5.h>
 
 krb5_error_code
 function (krb5_context context)
 {
     krb5_error_code ret;
 
     ret = krb5_function (context, arg1, arg2);
     if (ret) {
         char *s = krb5_get_error_message(context, ret);
         if (s == NULL)
              errx(1, "kerberos error: %d (and out of memory)", ret);
         application_logger("krb5_function failed: %s", s);
         krb5_free_error_string(context, s);
         return ret;
     }
     return 0;
 }
 

SEE ALSO

krb5(3), krb5_openlog3