Thanks for your bug report! I'm not classifying this as a security issue, but it is perhaps a bug with how at executes shell scripts. It's not missing, but it is pretty clear something is running, and by who:
$ pstree -lup | grep -- -at |-atd(8848,daemon)---atd(16284)---sh(16285,kees)---sleep(16484) $ cat /proc/16285/cmdline; echo '' sh
Thanks for your bug report! I'm not classifying this as a security issue, but it is perhaps a bug with how at executes shell scripts. It's not missing, but it is pretty clear something is running, and by who:
$ pstree -lup | grep -- -at
|-atd( 8848,daemon) ---atd( 16284)- --sh(16285, kees)-- -sleep( 16484) cmdline; echo ''
$ cat /proc/16285/
sh