mode_t - file attributes

       Used for some file attributes (e.g., file mode).  It is an integer type.

       POSIX.1-2001.

       Standard C library (libc)

       mode_t - file attributes

       The  following headers also provide this type: <fcntl.h>, <ndbm.h>, <spawn.h>, <sys/ipc.h>, <sys/mman.h>,
       and <sys/stat.h>.

chmod(2), mkdir(2), open(2), umask(2), stat(3type)

Linux man-pages 6.9.1                              2024-05-02                                      mode_t(3type)

       POSIX.1-2008.

#include<sys/types.h>typedef /* ... */ mode_t;