When running a failsafe shell on a console, job control was unavailable,
and ^C did not function correctly.
This change invokes console failsafe shells via `setsid`, making them
session leaders and allowing them to claim controlling terminals, which
makes job control function properly. To support this, the busybox
`setsid` utility is enabled. This has a minimal 149-byte size impact on
a test x86_64 squashfs rootfs image.
^C was ignored in subprocesses of failsafe shells: it was not possible
to ^C out of a program that would not exit on its own, such as many
typical `ping` invocations. As job control was unavailable, it was not
possible to suspend these subprocesses either, causing a hung program to
tie up a console indefinitely, unless another means to signal the
program was available. This was caused by SIGINT being placed at
disposition SIG_IGN by the shell running preinit, which it did because
the console shell was executed asynchronously with &. That disposition
was inherited by the console shell and its subprocesses, generally
causing ^C to have no effect.
As there is no way in busybox `ash` to reset the disposition of a signal
already ignored at shell entry, and no apparent way to avoid SIGINT
being placed at SIG_IGN when & is used in preinit, an alternative
construct is needed. Now, `start-stop-daemon` is used to start (-S) the
console failsafe shell in the background (-b). This approach does not
alter SIGINT, allowing the console shell to be started with that
signal's handling intact, and normal ^C processing to occur.
busybox `ash` has some behaviors conditional on SHLVL, and while the
console shells ought to run at SHLVL=1, they were not by virtue of being
started by the shell-based preinit system. Additionally, a variety of
detritus was present in the console shell's environment, carried over
from preinit. These conditions are corrected by running the console
shell via `env -i` to clear the environment and establish a minimum and
correct set of environment variables for operation, in the same manner
as `login`. HOME is not explicitly set, because it's addressed in
/etc/profile. For non-failsafe console shells when
system.@system[0].ttylogin = 0, `login -f root` achieves a similar
effect. (`login` already started non-failsafe console shells when
ttylogin = 1 and behaved correctly. This brings the ttylogin = 0 case to
parity.) Note that even `login -f` is somewhat undesirable for failsafe
shells because it requires a viable /etc/passwd, hence the `env -i`
construct in that case.
The TERM environment variable from the preinit environment, with value
"linux", would rarely be correct for serial consoles. Now, the preinit
TERM value is preserved (or set to "linux" if unset) only when the
console is /dev/console or /dev/tty[0-9]*. Otherwise, it will be set to
a safe default appropriate for serial consoles, "vt102", as used for
serial consoles by busybox init. This "linux"/"vt102" TERM setting is
also duplicated for non-failsafe console shells.
This also indicates failsafe mode by showing "- failsafe -" on all
consoles (not just the last-defined one). It sets a hostname of
"OpenWrt-failsafe" in failsafe mode which is rendered in the shell's
prompt as a reminder of the mode during interactive failsafe use.
Previously, no hostname was set, which resulted in the kernel-default
hostname, "(none)", appearing in failsafe shell prompts.
Signed-off-by: Mark Mentovai <mark@mentovai.com>
Link: https://github.com/openwrt/openwrt/pull/16113
Signed-off-by: Robert Marko <robimarko@gmail.com>
Add support for configuring rootfs mount options from cmdline.
Rootfs mount options can be passed by declaring in the kernel
cmdline as much options as needed prefixed with "rootfs_mount_options."
An example usage is with rootfs with F2FS filesystem to enable
compress_algorithm to reduce flash wear by compressing the files before
writing to flash.
Example usage:
"... rootfs_mount_options.compress_algorithm=zstd ..."
To pass multiple options:
"... rootfs_mount_options.compress_algorithm=zstd rootfs_mount_options.noinline_data ..."
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
When using OpenWRT with DSA and 'lan' ports, we could get an empty
`next_eth`. This is of course not desirable, as this causes `sh: out of
range` errors when trying to determine which one would be greater.
It turns out, that we don't even need this check at all because, when
looking for all existin eth*s on a system, and take the highest index
and then iterate a set of devices and rename to eth${highest_index+n},
it is guaranteed that there will be no conflict.
Fixes: b688bf83f9 ("base-files: rename ethernet devs on known boards")
Signed-off-by: Olliver Schinagl <oliver@schinagl.nl>
Some platforms lack an established way to name netdevs; for example,
on x86, PCIe-based ethernet interfaces will be named starting from
eth0 in the order they are probed. This is a problem for many devices
supported explicitly by OpenWrt which have hard-wired, standalone or
on-CPU NICs not supported by DSA (which is usually used to rename the
ports based on their ostensible function).
To fix this, add a mapping between ethernet device name and sysfs
device path to board.json; this allows us to configure ethernet device
names we know about for a given board so that they correspond to
external labeling.
Signed-off-by: Martin Kennedy <hurricos@gmail.com>
On x86, when both CONFIG_GRUB_CONSOLE and CONFIG_GRUB_SERIAL are set (as
they are by default), the kernel command line will have two console=
entries, such as
console=tty0 console=ttyS0,115200n8
Failsafe was only running a shell on the first defined console, the VGA
console. This is a problem for devices like apu2, where there is only a
serial console and it appears on ttyS0.
Moreover, the console prompt to enter failsafe during boot was delivered
to, and its input read from, the last console= on the kernel command
line. So while the failsafe shell was on the first defined console, only
the last defined console could be used to enter failsafe during boot.
In contrast, the x86 bootloader (GRUB) operates on both the serial
console and the VGA console by virtue of "terminal_{input,output}
console serial". GRUB also provided an alternate means to enter failsafe
from either console. The presence of two console= kernel command line
parameters causes kernel messages to be delivered to both. Under normal
operation (not failsafe), procd runs login in accordance with inittab,
which on x86 specifies ttyS0, hvc0, and tty1, allowing login through any
of serial, hypervisor, or VGA console. Thus, serial access was
consistently available on x86 devices with serial consoles under normal
operation, except for shell access in failsafe mode (without editing the
kernel command line).
By presenting the failsafe prompt, reading failsafe prompt input, and
running failsafe shells on all consoles listed in /proc/cmdline,
failsafe mode will work correctly on devices with a serial console (like
apu2), and the same image without any need for reconfiguration can be
shared by devices with the more traditional (for x86) VGA console. This
improvement should benefit any system with multiple console= arguments,
including x86 and bcm27xx (Raspberry Pi).
Signed-off-by: Mark Mentovai <mark at moxienet.com>
Vlan subinterface was never brought up when using vlan-based preinit network.
Tested forcing ifname="" before preinit_ip() on a Tp-Link Archer C5v4.
Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>
Some interfaces have a VLAN modifier like :t in lan1:t, this modifier
should be removed from the interface before calling preinit_ip_config().
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Adapt the preinit_config_board() to the board.json network changes. It
now looks for the device and the ports variables to configure the LAN
network.
This works with swconfig configurations.
Fixes: FS#3866
Fixes: d42640e389 ("base-files: use "ports" array in board.json network for bridges")
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Reviewed-by: Rafał Miłecki <rafal@milecki.pl>
Instead of only relying in /sysupgrade.tgz being present in rootfs to
restore configuration, also grab /tmp/sysupgrade.tar which may have
magically gotten there during preinit...
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
This drops the shebang from another bunch of files in various /lib
folders, as these are sourced and the shebang is useless.
Fix execute bit in one case, too.
This should cover almost all trivial cases now, i.e. where /lib is
actually used for library files.
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Support installations without root-overlayfs (and hence without /rom)
when migrating user accounts.
Signed-off-by: Imran Khan <gururug@gmail.com>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
[simplified patch, bumped PKG_RELEASE, cleaned message]
This replaces deprecated backticks by more versatile $(...) syntax.
This does not touch lib/upgrade/nand.sh, as there replacement is
not trivial.
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Due to filesystem write caching the old configuration data could stay
out of flash for a long time during a first boot after the sysupgrade.
Power loss during this period could damage the overlay data and even
make device inaccessable via the network.
Fix this by syncing data to a flash as soon as the previous
configuration will be unpacked after the sysupgrade. Also sync the FS
state after the sysupgrade.tgz archive removing to prevent duplicative
extraction of a previous configuration.
Tested with AMD Geode based board.
Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
current preinit code in base-files doesn't config switch when there are
no port roles defined. But this kind of configuration exists on single
port devices where switch vlan is simply disabled.
configure reset and enable_vlan property when a switch node exist.
Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
The sender domain has a DMARC Reject/Quarantine policy which disallows
sending mailing list messages using the original "From" header.
To mitigate this problem, the original message has been wrapped
automatically by the mailing list software.
Failsafe code of dropbear should be in the dropbear package not the
base-files package.
Signed-off-by: Kyle Copperfield <kmcopper@danwin1210.me>
The preinit network initialisation and failsafe informational message
are inherently racy as the interface takes some time to become
functional after "ip link set $pi_ifname up" command.
Consider this timing:
[ 12.002713] IPv6: ADDRCONF(NETDEV_UP): eth1: link is not ready
[ 12.008819] IPv6: ADDRCONF(NETDEV_UP): eth1.1: link is not ready
[ 12.118877] random: procd: uninitialized urandom read (4 bytes read)
[ 13.068614] eth1: link up (1000Mbps/Full duplex)
[ 13.073309] IPv6: ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready
[ 13.080445] IPv6: ADDRCONF(NETDEV_CHANGE): eth1.1: link becomes ready
Since the UDP message was sent prior to link becoming ready, it was
never seen on the wire.
The default failsafe timeout is set to 2 seconds, so with this patch
there are two attempts to send the message, one spent in vain, and the
other visible in tcpdump on an attached host. Of course, in cases when
the interface is brought up faster it leads to two messages, however it
should be harmless. This patch (almost) doesn't affect normal boot time
while still allowing to enter failsafe reliably with a single button
press, matching the official "generic failsafe" documentation.
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
With failsafe disabled there is no point in early network setup. We
don't send announcement over UDP and there is no way to ssh to the
device.
A side effect of this is avoiding a possibly incorrect network config
(only with failsafe disabled). This problem is related to possible
changes made by user in /etc/config/network.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
For targets using the generic board detection and board specific
settings in diag.sh, the board name is still unset at the time the
set_state() provided by diag.sh is called by 10_indicate_preinit.
Change the execution order to ensure the boardname is populated before
required the first time. Do the target specific board detection as
early as possible, directly followed by the generic one to allow a
seamless switch to the generic function for populating /tmp/sysinfo/.
Signed-off-by: Mathias Kresin <dev@kresin.me>
Don't pass the value unconditionally to swconfig as a parameter but
instead only call reset if it is 1.
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
The condition is always true due to the literal string followed the
-n test parameter. A model name set by target scripts always gets
overwritten this way.
Change the condition to check for an already existing destination file
as it was before 5e85ae9 ("base-files: fix error message during boot").
Signed-off-by: Mathias Kresin <dev@kresin.me>
Due to an empty pi_ifname in the generic failsafe setup, the deconfig
never removed the failsafe networking interface, causing broken
networking later on.
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Also configure the switch based on the failsafe config, and create the
failsafe interface as tagged if necessary.
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
In preparation of properly setting up vlans and switches, add
support for configuring failsafe on a vlan tagged interface.
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Move preinit interface and ip config to its own function to allow
calling it from more than one place.
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
This commit:
1) seed /dev/urandom with the saved seeds as early as possible
(see /lib/preinit/81_urandom_seed)
2) save a seed at /etc/urandom.seed if it doesn't exists
3) save a new seed each boot at "system.@system[0].urandom_seed"
(see /etc/init.d/urandom_seed)
We use getrandom() so we are sure /dev/urandom pool is initialized
Seed size is 512 bytes (ie /proc/sys/kernel/random/poolsize / 8)
it's the same size as in ubuntu 14.04 and all systemd systems
Seeding /dev/urandom doesn't change entropy estimation, so we still have
"random: ubus urandom read with 4 bits of entropy available"
messages in the logs, but we can now ignore them if
after "urandom-seed: Seeding with ..." message
Saving a new seed on each boot is disabled by default to avoid too much
writes without user consent
v2: log preinit messages to /dev/kmsg
v3: use non generic function name for logging, as /lib/preinit/ files
are all sourced together in /etc/preinit
v4: after a lot of discussion on the ML, use a uci config param
v5: config param is now the path of the seed
Signed-off-by: Etienne CHAMPETIER <champetier.etienne@gmail.com>
Acked-by: Jo-Philipp Wich <jo@mein.io>
This enables passworldless login for root via SSH whenever no root
password is set (e.g. after reset, flashing without keeping config
or in failsafe) and removes telnet support alltogether.
Signed-off-by: Steven Barth <steven@midlink.org>
SVN-Revision: 46809
This new argument is used right after starting regular preinit (which
happens if failsafe wasn't triggered). The main purpose of "preinit"
argument is to indicate that failsafe can be triggered, however we were
missing a way to inform user that we don't wait for a trigger anymore.
With this change it's clear when failsafe mode can be triggered.
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
SVN-Revision: 43715
