explain_munmap_or_die man page

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);

See Also

munmap(2)
unmap a file or device from memory
explain_munmap(3)
explain munmap(2) errors
exit(2)
terminate the calling process

Referenced By

explain(3), explain_munmap(3).