Path: utzoo!attcan!uunet!husc6!uwvax!oddjob!mimsy!dftsrv!ames!amdahl!ems!pwcs!elric!hawkmoon!det
From: det@hawkmoon.MN.ORG (Derek E. Terveer)
Newsgroups: comp.bugs.sys5
Subject: Re: compressdir bug?
Summary: hmmm, maybe my find is broken?
Message-ID: <318@hawkmoon.MN.ORG>
Date: 4 Sep 88 22:08:40 GMT
References: <303@hawkmoon.MN.ORG> <442@gt-ford.gtisqr.UUCP>
Organization: One of the Eternal Champions - Richfield, MN, 554232523, USA
Lines: 61

In article <442@gt-ford.gtisqr.UUCP>, stu@gtisqr.UUCP (Stu Donaldson) writes:
> In article <303@hawkmoon.MN.ORG>, root@hawkmoon.MN.ORG (Admin) writes:
> 
> > There is a missing `!' just before the -exec in the find.
> 
> 		find $@ -type f -links 1 -exec test -r {} -a -s {} \; \
> 		-exec expr '(' {} : '.*\.Z' ')' '=' 0 \; \
> 		-exec compress $OPTIONS {} \; >/dev/null
> 
> 	My copy of compressdir does not have the '!' and works
> 	just as I expect it to.  The test after the first exec
> 	is testing to see if the file is readable, and has a
> 	size greater than 0.  If you put a '!' in, then things
> 	shouldn't work, because it will only try and compress
> 	files that either aren't readable, or have a size of 0.
> 
> 	Did I misunderstand something?

I don't think so -- your analysis of the command is correct, however perhaps
this is a case where i may be forced to stick my foot in my mouth and wiggle my
toes vigoursly... (:-(  I assumed that because it didn't seem to work on MY
system (uPort V/386 3.0-L2.2) that it was a bug.

I any event this is why i decided to insert the "!" (before the first exec) in
my copy of compressdir:

$ cd /tmp
$ touch f		#create a file
$ chmod 777 f		#make it readable
$ ls -l /tmp/f		#show it as readable, n'est pas?
-rwxrwxrwx   1 det      sys           39 Sep  2 01:05 /tmp/f
$ type test		#where am i picking up test?
test is a shell builtin
$ ls -l /bin/test /usr/bin/test /usr/ubin/test	#check for test commands
/bin/test: No such file or directory
/usr/bin/test: No such file or directory
/usr/ubin/test: No such file or directory
$ test -r /tmp/f;echo $?	#test test  -- seems to work as expected..
0
$ find f -type f -links 1 -exec test -r {} \; -print	#should print "f" - no!
$ find f -type f -links 1 ! -exec test -r {} \; -print	#try the reverse - yes
f
$ echo exit 0 >/tmp/retcode	#create a program to return an exit code
$ chmod 777 /tmp/retcode	#make it executable
$ find f -type f -links 1 -exec /tmp/retcode \; -print	#this works as expected
f
$ echo exit 1 >/tmp/retcode	#reverse sense of exit code
$ find f -type f -links 1 -exec /tmp/retcode \; -print	#so does this!
$ 

So what is going on here?  Now, did I misunderstand something????

Is find using some other "test" than the one that is accessable from the shell?
(ksh, by the way)

derek
-- 
Derek Terveer		det@hawkmoon.MN.ORG
			w(612)681-6986	h(612)688-0667

"A proper king is crowned" -- Thomas B. Costain