explain_mmap_or_die3
Map file or device into memory and report errors
Usage
#include <libexplain/mmap.h>
void *explain_mmap_or_die(void *data, size_t data_size, int prot, int flags, int fildes, off_t offset);
void *explain_mmap_on_error(void *data, size_t data_size, int prot, int flags, int fildes, off_t offset);
Overview
The explain_mmap_or_die function is used to call the mmap(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_mmap(3) function, and then the process terminates by calling exit(EXIT_FAILURE).
The explain_mmap_on_error function is used to call the mmap(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_mmap(3) function, but still returns to the caller.
data
|
The data, exactly as to be passed to the mmap(2) system call. |
|---|---|
data_size
|
The data_size, exactly as to be passed to the mmap(2) system call. |
prot
|
The prot, exactly as to be passed to the mmap(2) system call. |
flags
|
The flags, exactly as to be passed to the mmap(2) system call. |
fildes
|
The fildes, exactly as to be passed to the mmap(2) system call. |
offset
|
The offset, exactly as to be passed to the mmap(2) system call. |
Return value
The explain_mmap_or_die function only returns on success, see mmap(2) for more information. On failure, prints an explanation and exits, it does not return.
The explain_mmap_on_error function always returns the value return by the wrapped mmap(2) system call.
Examples
The explain_mmap_or_die function is intended to be used in a fashion similar to the following example:
explain_mmap_or_die(data, data_size, prot, flags, fildes, offset);Releases
6 releases since Debian 7 (Wheezy); the text changed 1 time.