On Thu, 22 Jun 2006, Robert wrote:
> Can someone explain why this:
> find . -depth -print0 | cpio --null -pmd /tmp/test
> will copy all files in and below the current directory -and- this:
> find . -depth -print | grep -v .iso$ | wc -l
> will count all the non-iso files -and- this:
> find . -depth -print | grep .iso$ | wc -l
> will count *only* the iso files -but- this:
> find . -depth -print0 | grep -v .iso$ | cpio --null -pmd /tmp/test
> doesn't copy *anything*?
> Any suggestions for a work-around would also be most welcome.
>
Never seen print0 before, but on my system it has the effect of putting
all the filenames in single line. So grep -v eliminates the one line
that it finds leaving nothing to pass to cpio.
man find
-print True; print the full file name on the standard output, followed
by a newline.
-print0
True; print the full file name on the standard output, followed
by a null character. This allows file names that contain new-
lines to be correctly interpreted by programs that process the
find output.
cpio will understand the output of -print just fine. No need to use
print0
------------------------------------------------------------------------
Jim Wildman, CISSP, RHCE jim at rossberry.com http://www.rossberry.com
"Society in every state is a blessing, but Government, even in its best
state, is a necessary evil; in its worst state, an intolerable one."
Thomas Paine