diff --git a/sh/countdiff b/sh/countdiff
index 2f11394..8140a13 100755
--- a/sh/countdiff
+++ b/sh/countdiff
@@ -4,6 +4,7 @@
 # YES_DASH
 # YES_ASH
 # YES_BB_AWK
+# YES_OT_AWK
 
 countdiff() { ### @-
     ### count the number of lines changed between two files.
@@ -18,7 +19,7 @@ countdiff() { ### @-
     [ $# -gt 1 ] || { printf "%s\n" "$0: too few arguments" >&2; return 1; }
     [ $# -le 2 ] || { printf "%s\n" "$0: too many arguments" >&2; return 1; }
     git --no-pager diff --stat --no-color --no-index "$1" "$2" \
-    | awk '/changed/{print $4+$6;a=1}END{if(!a)print 0}'
+    | awk ' /changed/{print $4+$6;a=1}END{if(!a)print 0}'
 }
 
 [ -n "${preload+-}" ] || countdiff "$@"
diff --git a/sh/dfu b/sh/dfu
index 6ba9c95..5a13620 100755
--- a/sh/dfu
+++ b/sh/dfu
@@ -4,6 +4,7 @@
 # YES_DASH
 # YES_ASH
 # YES_BB_AWK
+# YES_OT_AWK
 
 dfu() { ### @-
     ### pretty-print `df` in GiB.
diff --git a/sh/oxo b/sh/oxo
index 99f1795..d989669 100755
--- a/sh/oxo
+++ b/sh/oxo
@@ -25,6 +25,7 @@ oxo() { ### @-
     ### $ echo test | oxo
     ### https://0x0.st/sj2.txt
     ### oxo: successfully uploaded 1/1 file
+    ###
     ### $ oxo ~/play/{hey,you,fake,empty}
     ### https://0x0.st/-3rz.txt
     ### oxo: expires in 365 days: /home/notwa/play/hey
@@ -67,7 +68,7 @@ oxo() { ### @-
             # restrict the filepath to simple ascii characters that curl likes.
             if [ "$f" != "${f#*[! -~]}" ] || [ "$f" != "${f#*[\":<>?\\|]}" ]; then
                 # copy the user's file to a temporary path and use that instead.
-                g=/tmp/oxo
+                g=/tmp/oxo.tmp
                 #printf "$warn" "oxo: special characters found: $f" >&2
                 if ! cp -p -- "$f" "$g"; then
                     printf "$bad" "oxo: failed to copy file: $f" >&2
diff --git a/sh/running b/sh/running
index 9eb0e6a..a6589bb 100755
--- a/sh/running
+++ b/sh/running
@@ -18,6 +18,13 @@ running() { ### @- WIP
         (*) printf '%s\n' "$usage" >&2; return 2;;
         esac
     done
+
+    # ps -o pid,comm=CMD
+    # argumentless flags accepted by busybox:
+    #   a   d e f       l                   A               T     Z
+    # argumentless flags accepted by coreutils:
+    #   a c d e f g h j l m n r s t u v w x A F H L M N P S T V X Z
+
     ps -f | awk -v cmd=$cmd -v pid=$pid '
     NR==1{
         s=index($0,"COMMAND")