NAME

elf_aux_info — extract data from the elf auxiliary vector of the current process

SYNOPSIS

#include <sys/auxv.h>

int
elf_aux_info(int aux, void *buf, int buflen);

DESCRIPTION

The elf_aux_info() function retrieves the auxiliary info vector requested in aux. The information is stored into the provided buffer if it will fit. The following values can be requested (corresponding buffer sizes are specified in parenthesis):

AT_HWCAP

CPU / hardware feature flags (sizeof(unsigned long)).

AT_HWCAP2

CPU / hardware feature flags (sizeof(unsigned long)).

AT_PAGESZ

Page size in bytes (sizeof(int)).

RETURN VALUES

Returns zero on success, or an error number on failure.

ERRORS

[EINVAL]

An unknown item was requested.

[EINVAL]

The provided buffer was not the right size for the requested item.

[ENOENT]

The requested item is not available.

HISTORY

The elf_aux_info() function appeared in FreeBSD 12.0 and was first available in OpenBSD 7.6.