Christian Manivong
647e058b8a
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run_command(privileged=True, stdin=data) sent `sudo -S` with stdin = <sudo password>\n + data. A sudo that does not prompt (NOPASSWD, a cached timestamp) leaves the password line on stdin, and the command reads it as the first line of the data - `cat > file` wrote it into the file (NetOrk/netork#1029). run_command now raises ValueError for that combination before opening a channel. Stdin still reaches the command under `sudo -n` (no password set), for a root login, and for unprivileged commands. Callers stage the data without privilege and have root install the file. open_stream documents the same caveat.