Replace some uname -s checks with $OSTYPE ones.

completions/crontab

@@ -16,7 +16,7 @@ _crontab()
     esac
 
     local i opts=" -u -l -r -e" # leading space at start is significant...
-    [ "$(uname -s)" = Linux ] && opts="$opts -i"
+    [[ $OSTYPE == *linux* ]] && opts="$opts -i"
     [ -e /etc/selinux ] && opts="$opts -s"
     for (( i=0; i < ${#COMP_WORDS[@]}-1; i++ )); do
         case "${COMP_WORDS[i]}" in

completions/findutils

@@ -23,10 +23,9 @@ _find()
             ;;
         -fstype)
             _fstypes
-            if [[ "$( uname -s )" == *BSD ]] ; then
+            [[ $OSTYPE == *bsd* ]] && \
                 COMPREPLY=( "${COMPREPLY[@]}" \
                     $( compgen -W 'local rdonly' -- "$cur" ) )
-            fi
             return 0
             ;;
         -gid)

completions/mount

@@ -140,7 +140,7 @@ _umount()
     _get_comp_words_by_ref cur
     COMPREPLY=()
 
-    if [[ $(uname -s) = Linux && -r /proc/mounts ]]; then
+    if [[ $OSTYPE == *linux* && -r /proc/mounts ]]; then
         # Linux /proc/mounts is properly quoted. This is important when
         # unmounting usb devices with pretty names.
         _linux_fstab < /proc/mounts