diff --git a/b/2/include/sys/stat.h b/b/2/include/sys/stat.h
new file mode 100644
index 0000000..41c3840
--- /dev/null
+++ b/b/2/include/sys/stat.h
@@ -0,0 +1,58 @@
+#ifndef _SYS_STAT_H
+#define _SYS_STAT_H
+
+#include <sys/types.h>
+
+struct stat {
+	dev_t	st_dev;
+	ino_t	st_ino;
+	umode_t	st_mode;
+	nlink_t	st_nlink;
+	uid_t	st_uid;
+	gid_t	st_gid;
+	dev_t	st_rdev;
+	off_t	st_size;
+	time_t	st_atime;
+	time_t	st_mtime;
+	time_t	st_ctime;
+};
+
+#define S_IFMT  00170000
+#define S_IFREG  0100000
+#define S_IFBLK  0060000
+#define S_IFDIR  0040000
+#define S_IFCHR  0020000
+#define S_IFIFO  0010000
+#define S_ISUID  0004000
+#define S_ISGID  0002000
+#define S_ISVTX  0001000
+
+#define S_ISREG(m)	(((m) & S_IFMT) == S_IFREG)
+#define S_ISDIR(m)	(((m) & S_IFMT) == S_IFDIR)
+#define S_ISCHR(m)	(((m) & S_IFMT) == S_IFCHR)
+#define S_ISBLK(m)	(((m) & S_IFMT) == S_IFBLK)
+#define S_ISFIFO(m)	(((m) & S_IFMT) == S_IFIFO)
+
+#define S_IRWXU 00700
+#define S_IRUSR 00400
+#define S_IWUSR 00200
+#define S_IXUSR 00100
+
+#define S_IRWXG 00070
+#define S_IRGRP 00040
+#define S_IWGRP 00020
+#define S_IXGRP 00010
+
+#define S_IRWXO 00007
+#define S_IROTH 00004
+#define S_IWOTH 00002
+#define S_IXOTH 00001
+
+extern int chmod(const char *_path, mode_t mode);
+extern int fstat(int fildes, struct stat *stat_buf);
+extern int mkdir(const char *_path, mode_t mode);
+extern int mkfifo(const char *_path, mode_t mode);
+extern int stat(const char *filename, struct stat *stat_buf);
+extern mode_t umask(mode_t mask);
+
+#endif