> This requires a GNU xargs that supports NULL termination (or something compatible); as I understand it, this cannot be done with POSIX tools. You can do this

> This requires a GNU xargs that supports NULL termination (or something compatible); as I understand it, this cannot be done with POSIX tools. You can do this with `tr`, right? #!/bin/dash for path in /proc/*/cmdline do p=${path#*/} p=${p#*/} p=${p%/*} case "$p" in *[!0-9]*) continue;; esac c="$(tr '\0' ' ' < "$path" | sed '$s/ $//')" [ -n "$c" ] && printf %6d\ %s\\n "$p" "$c" done Those escape sequences are covered in the standard: https://pubs.opengroup.org/onlinepubs/9699919799/utilities/tr.html https://pubs.opengroup.org/onlinepubs/9699919799/utilities/t... (But please correct me if I'm missing something!) This also avoids (POSIX-)undefined behavior with `echo` in case one of the processes' `argv[0]` happens to begin with `-n` or any argument contains a backslash.