+#ifndef _POSIX_SOURCE
+#define st_atime st_atimespec.ts_sec
+#define st_mtime st_mtimespec.ts_sec
+#define st_ctime st_ctimespec.ts_sec
+#endif
+
+#define S_ISUID 0004000 /* set user id on execution */
+#define S_ISGID 0002000 /* set group id on execution */
+#ifndef _POSIX_SOURCE
+#define S_ISTXT 0001000 /* sticky bit */
+#endif
+
+#define S_IRWXU 0000700 /* RWX mask for owner */
+#define S_IRUSR 0000400 /* R for owner */
+#define S_IWUSR 0000200 /* W for owner */
+#define S_IXUSR 0000100 /* X for owner */
+
+#ifndef _POSIX_SOURCE
+#define S_IREAD S_IRUSR
+#define S_IWRITE S_IWUSR
+#define S_IEXEC S_IXUSR
+#endif
+
+#define S_IRWXG 0000070 /* RWX mask for group */
+#define S_IRGRP 0000040 /* R for group */
+#define S_IWGRP 0000020 /* W for group */
+#define S_IXGRP 0000010 /* X for group */
+
+#define S_IRWXO 0000007 /* RWX mask for other */
+#define S_IROTH 0000004 /* R for other */
+#define S_IWOTH 0000002 /* W for other */
+#define S_IXOTH 0000001 /* X for other */
+
+#ifndef _POSIX_SOURCE
+#define S_IFMT 0170000 /* type of file mask */
+#define S_IFIFO 0010000 /* named pipe (fifo) */
+#define S_IFCHR 0020000 /* character special */
+#define S_IFDIR 0040000 /* directory */
+#define S_IFBLK 0060000 /* block special */
+#define S_IFREG 0100000 /* regular */
+#define S_IFLNK 0120000 /* symbolic link */
+#define S_IFSOCK 0140000 /* socket */
+#define S_IFWHT 0160000 /* whiteout */
+#define S_ISVTX 0001000 /* save swapped text even after use */
+#endif
+
+#define S_ISDIR(m) ((m & 0170000) == 0040000) /* directory */
+#define S_ISCHR(m) ((m & 0170000) == 0020000) /* char special */
+#define S_ISBLK(m) ((m & 0170000) == 0060000) /* block special */
+#define S_ISREG(m) ((m & 0170000) == 0100000) /* regular file */
+#define S_ISFIFO(m) ((m & 0170000) == 0010000 || \
+ (m & 0170000) == 0140000) /* fifo or socket */
+#ifndef _POSIX_SOURCE
+#define S_ISLNK(m) ((m & 0170000) == 0120000) /* symbolic link */
+#define S_ISSOCK(m) ((m & 0170000) == 0010000 || \
+ (m & 0170000) == 0140000) /* fifo or socket */
+#define S_ISWHT(m) ((m & 0170000) == 0160000) /* whiteout */
+#endif
+
+#ifndef _POSIX_SOURCE
+#define ACCESSPERMS (S_IRWXU|S_IRWXG|S_IRWXO) /* 0777 */
+ /* 7777 */
+#define ALLPERMS (S_ISUID|S_ISGID|S_ISTXT|S_IRWXU|S_IRWXG|S_IRWXO)
+ /* 0666 */
+#define DEFFILEMODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
+
+#define S_BLKSIZE 512 /* block size used in the stat struct */
+
+/*
+ * Definitions of flags stored in file flags word.
+ *
+ * Super-user and owner changeable flags.
+ */
+#define UF_SETTABLE 0x0000ffff /* mask of owner changeable flags */
+#define UF_NODUMP 0x00000001 /* do not dump file */
+#define UF_IMMUTABLE 0x00000002 /* file may not be changed */
+#define UF_APPEND 0x00000004 /* writes to file may only append */
+#define UF_OPAQUE 0x00000008 /* directory is opaque wrt. union */
+/*
+ * Super-user changeable flags.
+ */
+#define SF_SETTABLE 0xffff0000 /* mask of superuser changeable flags */
+#define SF_ARCHIVED 0x00010000 /* file is archived */
+#define SF_IMMUTABLE 0x00020000 /* file may not be changed */
+#define SF_APPEND 0x00040000 /* writes to file may only append */
+
+#ifdef KERNEL
+/*
+ * Shorthand abbreviations of above.
+ */
+#define OPAQUE (UF_OPAQUE)
+#define APPEND (UF_APPEND | SF_APPEND)
+#define IMMUTABLE (UF_IMMUTABLE | SF_IMMUTABLE)
+#endif
+#endif
+
+#ifndef KERNEL
+#include <sys/cdefs.h>