[lddtree.sh] Fixed Bad substitution if running in dash

[vhulagov]

Hello. =)
~$ bash -exc 'libs="abc,foo,bar"; for lib in ${libs//,/ }; do echo $lib; done'
~+ libs=abc,foo,bar
~+ for lib in '${libs//,/ }'
~+ echo abc
abc
~+ for lib in '${libs//,/ }'
~+ echo foo
foo
~+ for lib in '${libs//,/ }'
~+ echo bar
bar
~$ dash -exc 'libs="abc,foo,bar"; for lib in ${libs//,/ }; do echo $lib; done'
~+ libs=abc,foo,bar
dash: 1: Bad substitution
~~$ sh -exc 'libs="abc,foo,bar"; for lib in ${libs//,/ }; do echo $lib; done'
~+ libs=abc,foo,bar
sh: 1: Bad substitution

[ncopa]

What do you think about something like this? The difference is that it avoids a couple of forks so it should be slightly faster when you have many files.

@@ -216,7 +216,12 @@ show_elf() {
                allhits="${allhits},${interp},${libs}"
        fi

-       for lib in ${libs//,/ } ; do
+       oifs="$IFS"
+       IFS=,
+       set -- ${libs}
+       IFS="$oifs"
+
+       for lib; do
                lib=${lib##*/}
                case ",${my_allhits}," in
                        *,${lib},*) continue;;