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Re: mode of pidfile

From: Ottavio Caruso
Subject: Re: mode of pidfile
Date: Wed, 01 Jul 2020 18:28:06 +0200
User-agent: Roundcube Webmail/1.3.2

On 2020-07-01 18:00, Ottavio Caruso wrote:
On Wed, 1 Jul 2020 at 16:59, Ottavio Caruso
<ottavio2006-usenet2012@yahoo.com> wrote:

On Wed, 1 Jul 2020 at 16:45, Kai Peter <kp@lists.openqmail.org> wrote:
> Hi,
> I'm curious why the option -pidfile creates a file with mode 0600.

It doesn't :

Sorry, I meant it does, but not owned by root:

oc@e130:~$ cat opt/bin/boot-openbsd-virtio
qemu-system-x86_64 \
-drive if=virtio,file=/home/oc/VM/img/openbsd.image,index=0,media=disk \
-M q35,accel=kvm -m 250M -cpu host,kvmclock-stable-bit -smp $(nproc) \
-nic user,hostfwd=tcp:,model=virtio-net-pci \
-daemonize -display none  \
-serial mon:telnet:,server,nowait \
-pidfile /home/oc/VM/pid/openbsd-pid

oc@e130:~$ ls -l /home/oc/VM/pid/
total 4
-rw------- 1 oc oc 5 Jul  1 16:54 openbsd-pid

Exactly, it will be created with mode 0600 (-rw-------). Maybe I wasn't clear enough: I want to know why? And Whay not 0644 (-rw-r--r--). Qemu sets the owner of the user who invokes it - that's fine. Starting qemu as root creates the file owned root:root. Than "-runas <ordinary user>" drops privileges and the <ordinary user> couldn't read the file. Maybe there is a reason for?


Ottavio Caruso

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