system/csh: Fix doinst.sh.

Signed-off-by: B. Watson <yalhcru@gmail.com>

system/csh/csh.SlackBuild

@@ -6,6 +6,10 @@
 
 # Licensed under the WTFPL. See http://www.wtfpl.net/txt/copying/ for details.
 
+# 20220409 bkw: BUILD=2
+# - fix doinst.sh: only create bin/csh symlink if bin exists, which
+#   fixes installing the package with 'installpkg -root /some/path'.
+
 # 20210827 bkw:
 # - update to latest debian patch (6), add deb version to VERSION.
 # - add -current fix for recent glibc.
@@ -19,7 +23,7 @@ cd $(dirname $0) ; CWD=$(pwd)
 
 PRGNAM=csh
 VERSION=${VERSION:-20110502_6}
-BUILD=${BUILD:-1}
+BUILD=${BUILD:-2}
 TAG=${TAG:-_SBo}
 PKGTYPE=${PKGTYPE:-tgz}
 

system/csh/doinst.sh

@@ -1,19 +1,16 @@
 config() {
   NEW="$1"
   OLD="$(dirname $NEW)/$(basename $NEW .new)"
-  # If there's no config file by that name, mv it over:
   if [ ! -r $OLD ]; then
     mv $NEW $OLD
   elif [ "$(cat $OLD | md5sum)" = "$(cat $NEW | md5sum)" ]; then
-    # toss the redundant copy
     rm $NEW
   fi
-  # Otherwise, we leave the .new copy for the admin to consider...
 }
 
 config etc/csh.login.new
 
 # If there's no csh link, take over:
-if [ ! -r bin/csh ]; then
+if [ -d bin -a ! -r bin/csh ]; then
   ( cd bin ; ln -sf ../usr/bin/csh csh )
 fi