Phillip Susi <[EMAIL PROTECTED]> writes: > What is atomic about having dd do this? open() with O_DIRECTORY to test for > existence of a directory is exactly what test does isn't it?
No, because "test -d foo && test -r foo" is _two_ invocations of "test", not one. A race condition is therefore possible. The race condition is not possible with dd if=foo iflag=directory count=0. Admittedly this usage is unusual. The main arguments for it are (1) "dd" supports all the other O_* flags, so why not O_DIRECTORY? and (2) I ran into a situation where I could use O_DIRECTORY. (1) is far more important than (2). _______________________________________________ Bug-coreutils mailing list Bug-coreutils@gnu.org http://lists.gnu.org/mailman/listinfo/bug-coreutils
