libexplain/gethostid_or_die.c File Reference

#include <libexplain/ac/errno.h>
#include <libexplain/ac/unistd.h>
#include <libexplain/gethostid.h>
#include <libexplain/output.h>

Go to the source code of this file.

Functions
long	explain_gethostid_or_die (void)
long	explain_gethostid_on_error (void)

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Function Documentation

long explain_gethostid_on_error

(

void

)

The explain_gethostid_on_error function is used to call the gethostid(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_gethostid(3) function.

Returns:

The value returned by the wrapped gethostid(3) system call.

Example:

This function is intended to be used in a fashion similar to the following example:

 errno = 0;
 long result = explain_gethostid_on_error();
 if (result < 0 || errno != 0)
 {
     ...cope with error
     ...no need to print error message
 }

Definition at line 42 of file gethostid_or_die.c.

long explain_gethostid_or_die

(

void

)

The explain_gethostid_or_die function is used to call the gethostid(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_gethostid(3) function, and then the process terminates by calling exit(EXIT_FAILURE).

Returns:

This function only returns on success, see gethostid(3) for more information. On failure, prints an explanation and exits, it does not return.

Example:

This function is intended to be used in a fashion similar to the following example:

 long result = explain_gethostid_or_die();

Definition at line 27 of file gethostid_or_die.c.