Man page - explain_munmap_or_die(3)

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Manual

explain_munmap_or_die

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
EXAMPLE
SEE ALSO
COPYRIGHT

NAME

explain_munmap_or_die - unmap a file or device from memory and report errors

SYNOPSIS

#include <libexplain/munmap.h>
void explain_munmap_or_die(void *data, size_t data_size);
int explain_munmap_on_error(void *data, size_t data_size);

DESCRIPTION

The explain_munmap_or_die function is used to call the munmap (2) system call. On failure an explanation will be printed to stderr , obtained from the explain_munmap (3) function, and then the process terminates by calling exit(EXIT_FAILURE).

The explain_munmap_on_error function is used to call the munmap (2) system call. On failure an explanation will be printed to stderr , obtained from the explain_munmap (3) function, but still returns to the caller.

data

The data, exactly as to be passed to the munmap (2) system call.

data_size

The data_size, exactly as to be passed to the munmap (2) system call.

RETURN VALUE

The explain_munmap_or_die function only returns on success, see munmap (2) for more information. On failure, prints an explanation and exits, it does not return.

The explain_munmap_on_error function always returns the value return by the wrapped munmap (2) system call.

EXAMPLE

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

explain_munmap_or_die(data, data_size);