Re: [arch-general] [ Pacman -Syu ] Creating temporary files..., error: command failed to execute correctly

[陈贤文]

Dear Ralph,

Thank you very much for the lecture!
It seems that the issue may be permissions.

    $ sudo /usr/bin/systemd-tmpfiles --create /run/tmpfiles.d/kmod.conf

Arch returns:

    Detected unsafe path transition / → /dev during canonicalization of 
/dev.
    Detected unsafe path transition / → /dev during canonicalization of 
/dev.
    Detected unsafe path transition / → /dev during canonicalization of 
/dev.
    Detected unsafe path transition / → /dev during canonicalization of 
/dev.
    Detected unsafe path transition / → /dev during canonicalization of 
/dev.

    $ cat /run/tmpfiles.d/kmod.conf
    c! /dev/fuse 0600 - - - 10:229
    c! /dev/cuse 0600 - - - 10:203
    c! /dev/btrfs-control 0600 - - - 10:234
    c! /dev/nvram 0600 - - - 10:144
    c! /dev/loop-control 0600 - - - 10:237
    d /dev/net 0755 - - -
    c! /dev/net/tun 0600 - - - 10:200
    c! /dev/ppp 0600 - - - 108:0
    c! /dev/uinput 0600 - - - 10:223
    d /dev/mapper 0755 - - -
    c! /dev/mapper/control 0600 - - - 10:236
    d /dev/vfio 0755 - - -
    c! /dev/vfio/vfio 0600 - - - 10:196
    c! /dev/userio 0600 - - - 10:240
    c! /dev/vhci 0600 - - - 10:137
    c! /dev/uhid 0600 - - - 10:239
    c! /dev/vhost-net 0600 - - - 10:238
    c! /dev/vhost-vsock 0600 - - - 10:241
    d /dev/snd 0755 - - -
    c! /dev/snd/timer 0600 - - - 116:33
    d /dev/snd 0755 - - -
    c! /dev/snd/seq 0600 - - - 116:1

There are more error messages of unsafe path transition if I run

$ sudo /usr/bin/systemd-tmpfiles --create

without specifying a tmpfile, then all tmpfiles are triggered.

After searching on-line, it seemed that similar problems were reported 
by other users of systemd. The fix is to set owner of / as root.root. I 
tried the solution and it worked! Running

$ sudo /usr/bin/systemd-tmpfiles --create

no longers gives me error message!

Yours sincerely,

Xianwen


On 07/09/2019 15.07, Ralph Corderoy wrote:
Dear Xianwen,

:: Running post-transaction hooks...
...
(5/9) Creating temporary files...
error: command failed to execute correctly
(6/9) Reloading device manager configuration...
Here's the path I trod to investigate this.

     $ cd /usr/share/libalpm/hooks
     $ grep 'Creating temporary files' *
     systemd-tmpfiles.hook:Description = Creating temporary files...
     $
     $ cat systemd-tmpfiles.hook
     [Trigger]
     Type = File
     Operation = Install
     Operation = Upgrade
     Target = usr/lib/tmpfiles.d/*.conf

     [Action]
     Description = Creating temporary files...
     When = PostTransaction
     Exec = /usr/share/libalpm/scripts/systemd-hook tmpfiles
     $
     $ file /usr/share/libalpm/scripts/systemd-hook
     /usr/share/libalpm/scripts/systemd-hook: POSIX shell script, ASCII text 
executable
     $
     $ grep -1 tmpfiles /usr/share/libalpm/scripts/systemd-hook
       sysusers) /usr/bin/systemd-sysusers ;;
       tmpfiles) /usr/bin/systemd-tmpfiles --create ;;

     $
     $ man systemd-tmpfiles
     ...
     DESCRIPTION
           systemd-tmpfiles creates, deletes, and cleans up volatile and
           temporary files and directories, based on the configuration file
           format and location specified in tmpfiles.d(5).

     $ man 5 tmpfiles.d
     ...
     SYNOPSIS
           /etc/tmpfiles.d/*.conf
           /run/tmpfiles.d/*.conf
           /usr/lib/tmpfiles.d/*.conf

           ~/.config/user-tmpfiles.d/*.conf
           $XDG_RUNTIME_DIR/user-tmpfiles.d/*.conf
           ~/.local/share/user-tmpfiles.d/*.conf
           ...
           /usr/share/user-tmpfiles.d/*.conf

So one of the *.conf files in those directory is triggering that error.
systemd-tmpfiles(8) says one or more *.conf files can be given after
‘--create’ so I suggest running it on each in turn to see if the
error still occurs for one of them.  This may required sudo(8).