On 14/1/21 9:51 pm, Russell Coker wrote:
On Thursday, 14 January 2021 5:26:05 PM AEDT Andrew Greig via luv-main wrote:
I had Ramme installed by Deb on Ubuntu 18.04LTS and it worked quite well
with occasional flakiness, but no hanging the computer. I have upgraded
to Ubuntu 20.4 LTS and now Ramme does not fire up. Starting it from the
terminal I get only "Segmentation Fault".
Does it say anything else? Have you run gdb on the core file to see where it
crashed? Have you tried running strace on it to see what it was doing before
it crashed?
One thing you can do is use systemd-nspawn to create a chroot setup running an
older version. On my workstations I have many old versions of Debian in
chroots via systemd-nspawn. I have configured it to run sshd in the chroot
and then I give each chroot a different address so I can ssh to any of them.
A single sshd process takes hardly any resources so having a dozen chroots
running at the same time is no big deal.
Here's the systemd service file I use to start a wheezy chroot. If I wanted
the home directory bind mounted (which you probably want) I'd add --bind=/home
# cat /etc/systemd/system/wheezy.service
[Unit]
Description=wheezy
[Service]
ExecStart=/usr/bin/systemd-nspawn -D /chroot/wheezy -M wheezy --bind=/tmp /
usr/local/sbin/run-sshd
ExecReload=/bin/kill -HUP $MAINPID
StandardOutput=syslog
KillMode=mixed
Type=notify
RestartForceExitStatus=133
SuccessExitStatus=133
[Install]
WantedBy=multi-user.target
Here's the script that is used to start sshd.
# cat /chroot/wheezy/usr/local/sbin/run-sshd
#!/bin/bash
mkdir -p /var/run/sshd
exec /usr/sbin/sshd -D
Thanks Russell,
I took a guess on the syntax alg@andrewg:~$ sudo strace ramme -v
And I got a mountain of output, the last few lines of which are here:
madvise(0x37db42585000, 1048576, MADV_DONTNEED) = 0
madvise(0x37db42599000, 4096, MADV_DONTNEED) = 0
madvise(0x37db42599000, 4096, MADV_DONTNEED) = 0
futex(0x7f75956a2f38, FUTEX_WAKE_PRIVATE, 2147483647) = 0
futex(0x7f75956a2f38, FUTEX_WAKE_PRIVATE, 2147483647) = 0
getrandom("\xef", 1, GRND_NONBLOCK) = 1
stat("/etc/gnutls/config", 0x7ffdb8f5b6d0) = -1 ENOENT (No such file or
directory)
statfs("/sys/fs/selinux", 0x7ffdb8f5b6c0) = -1 ENOENT (No such file or
directory)
statfs("/selinux", 0x7ffdb8f5b6c0) = -1 ENOENT (No such file or
directory)
openat(AT_FDCWD, "/proc/filesystems", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
read(3, "nodev\tsysfs\nnodev\ttmpfs\nnodev\tbd"..., 1024) = 367
read(3, "", 1024) = 0
close(3) = 0
access("/etc/selinux/config", F_OK) = -1 ENOENT (No such file or
directory)
--- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_ACCERR, si_addr=0xe6e0c0} ---
+++ killed by SIGSEGV (core dumped) +++
Segmentation fault
If the whole output is needed I will output to a text file and stuff it
in Google drive and send a link
Many thanks
Andrew
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