file.chmod(mode_int)   → 0

Changes permission bits on file to the bit pattern represented by mode_int. Actual effects are platform dependent; on Unix systems, see chmod(2) for details. Follows symbolic links. Also see File#lchmod.

f = File.new("out", "w");
f.chmod(0644)   #=> 0

Source Code

/*
*  call-seq:
*     file.chmod(mode_int)   => 0
*  
*  Changes permission bits on <i>file</i> to the bit pattern
*  represented by <i>mode_int</i>. Actual effects are platform
*  dependent; on Unix systems, see <code>chmod(2)</code> for details.
*  Follows symbolic links. Also see <code>File#lchmod</code>.
*     
*     f = File.new("out", "w");
*     f.chmod(0644)   #=> 0
*/

static VALUE
rb_file_chmod(obj, vmode)
   VALUE obj, vmode;
{
   OpenFile *fptr;
   int mode;

   rb_secure(2);
   mode = NUM2INT(vmode);

   GetOpenFile(obj, fptr);
#ifdef HAVE_FCHMOD
   if (fchmod(fileno(fptr->f), mode) == -1)
       rb_sys_fail(fptr->path);
#else
   if (!fptr->path) return Qnil;
   if (chmod(fptr->path, mode) == -1)
       rb_sys_fail(fptr->path);
#endif

   return INT2FIX(0);
}