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OpenSSH checks during ./configure if the default location /var/run
exists on the build host, and defaults to ${sysconfdir} (/etc/ssh in
Buildroot) if not. This can break e.g. in a sandbox with its own mount
namespace where there is no reason to create a /var.
On the target this leads to errors when starting/stopping the service
from the init script, which expects the PID file at /var/run/sshd.pid if
sshd is running. A "stop" (including as part of "restart") or "reload"
will always fail with
no /usr/sbin/sshd found; none killed
from start-stop-daemon, even though sshd is running (because the PID
file doesn't exist where start-stop-daemon tries to read it).
On the other hand, a "start" command will try to start sshd even if it
is already running, because it cannot detect the running instance.
Unfortunately sshd does not fail directly in that situation (so the init
script completes), but something like the following appears in the log:
[May 04 14:48:05] auth sshd[4592]: error: Bind to port 22 on 0.0.0.0
failed: Address in use.
[May 04 14:48:05] auth sshd[4592]: error: Bind to port 22 on :: failed:
Address in use.
[May 04 14:48:05] auth sshd[4592]: fatal: Cannot bind any address.
Explicitly setting --with-pid-dir=/var/run overrides either default,
and only logs a warning if /var/run does not exist.
[1] 5fa60ae0d2/configure.ac (L5568-L5576)
Signed-off-by: Fiona Klute <fiona.klute@gmx.de>
[Marcus: expand commit message after discussion on ML]
Signed-off-by: Marcus Hoffmann <buildroot@bubu1.eu>
(cherry picked from commit c09bec68f1)
Signed-off-by: Thomas Perale <thomas.perale@mind.be>
Buildroot is a simple, efficient and easy-to-use tool to generate embedded Linux systems through cross-compilation. The documentation can be found in docs/manual. You can generate a text document with 'make manual-text' and read output/docs/manual/manual.text. Online documentation can be found at https://buildroot.org/docs.html To build and use the buildroot stuff, do the following: 1) run 'make menuconfig' 2) select the target architecture and the packages you wish to compile 3) run 'make' 4) wait while it compiles 5) find the kernel, bootloader, root filesystem, etc. in output/images You do not need to be root to build or run buildroot. Have fun! Buildroot comes with a basic configuration for a number of boards. Run 'make list-defconfigs' to view the list of provided configurations. Please feed suggestions, bug reports, insults, and bribes back to the buildroot mailing list: buildroot@buildroot.org You can also find us on #buildroot on OFTC IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches