Don't hard code paths in 1990/jaw/shark.sh

It is not actually necessary to mess with the path and in fact the $PATH
variable is no longer modified or even referred to. The purpose of the
program was that even without btoa and uncompress the script should be
able to extract the tarball.

Now only the tarball path is hard coded as reading a tarball from stdin
is problematic though I'm pretty sure it used to work.

1990/jaw/Makefile

@@ -142,7 +142,7 @@ atob: zcat
 ${PROG}:
 	${RM} -f $@
 	echo 'PATH=;export PATH;./atob|./zcat' > $@
-	${CHMOD} 0555 $@
+	${CHMOD} 0755 $@
 
 # alternative executable
 #

1990/jaw/shark.sh

@@ -9,11 +9,11 @@ for i in "${@?${usage?$0 file...}}";do<"$i"||exit;done
 #
 # "Cleverly he dialed from within." -- D. Van Vliet, "Trout Mask Replica"
 #
-PATH=$PATH:.:.. a=atob m=unshark z=zcat
+a=atob m=unshark z=zcat
 r="rm -f $a $m* ../$m.tar $z" v="cc -Wno-implicit-function-declaration -Wno-implicit-int -o $z $m.c"
 trap '$r;exit 1' 1 2 13 15
 echo decoding...
-(:|compress|btoa|./$a|./$z)2>$m>&2||(sed '1,9s/./#define & /
+(:|compress|btoa|$a|$z)2>$m>&2||(sed '1,9s/./#define & /
 s/@/[w]/g
 s/C/char /g
 s/I/;if(/g

thanks-for-fixes.md

@@ -948,10 +948,9 @@ with if the C preprocessor botches single quotes in cpp expansion.
 
 ## [1990/jaw](1990/jaw/jaw.c) ([README.md](1990/jaw/README.md]))
 
-Cody fixed the script to work properly in modern environments including paths,
-writing to and extracting from stdout, (to do with `$PATH`
-not having `.` in it) and relying on the exit code in the commands to allow for
-`&& ...`.
+Cody fixed the script to work properly in modern environments including writing
+to and extracting from `stdout` and relying on the exit code in the commands to
+allow for `&& ...`.
 
 He also changed the `perror(3)` call to `fprintf(3)` because in macOS when errno
 is 0 it shows what looks like an error.
@@ -961,7 +960,7 @@ the time.
 
 NOTE: as `btoa` is not common we used a ruby script from Yusuke but with a minor
 fix applied by Cody that made the program just show `oops` twice from invalid
-input.
+input but which now works.
 
 
 ## [1990/pjr](1990/pjr/pjr.c) ([README.md](1990/pjr/README.md]))