NAME¶

hugetlbfs_unlinked_fd, hugetlbfs_unlinked_fd_for_size - Obtain a file descriptor for a new unlinked file in hugetlbfs

SYNOPSIS¶

#include <hugetlbfs.h>

int hugetlbfs_unlinked_fd(void);
int hugetlbfs_unlinked_fd_for_size(long page_size);

DESCRIPTION¶

These functions return an open file descriptor for a unique, newly-created file in a hugetlbfs filesystem. To avoid leaking hugepages, the file is unlinked automatically before the function returns.

For hugetlbfs_unlinked_fd, the default huge page size is used (see gethugepagesize(3)). For hugetlbfs_unlinked_fd_for_size, a valid huge page size must be specified (see gethugepagesizes(3)).

RETURN VALUE¶

On success, a valid open file descriptor is returned. On failure, -1 is returned and errno may be set appropriately.

SEE ALSO¶

gethugepagesize(3), gethugepagesizes(3), mkstemp(3), libhugetlbfs(7)

AUTHORS¶

libhugetlbfs was written by various people on the libhugetlbfs-devel mailing list.