File.umask

(?::int umask) -> ::Integer

File.umask() → integer

File.umask(integer) → integer

static VALUE
rb_file_s_umask(int argc, VALUE *argv, VALUE _)
{
    mode_t omask = 0;

    switch (argc) {
      case 0:
        omask = umask(0);
        umask(omask);
        break;
      case 1:
        omask = umask(NUM2MODET(argv[0]));
        break;
      default:
        rb_error_arity(argc, 0, 1);
    }
    return MODET2NUM(omask);
}

Returns the current umask value for this process. If the optional argument is given, set the umask to that value and return the previous value. Umask values are subtracted from the default permissions, so a umask of 0222 would make a file read-only for everyone.

Example

File.umask(0006)   #=> 18
File.umask         #=> 6

See also .truncate .unlink .symlink? .utime also in 4.1 · 4.0 · 3.3 · 3.2 · 3.1 · 3.0

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