Dracut will generate systemd units for additional devices that should be
brought up during boot, e.g. swap devices. These unit files are broken
symlinks with \ in the filename, e.g.
/etc/systemd/system/initrd.target.wants/dev-disk-by\x2duuid-e6a54f99\x2da4fd\x2d4931\x2da956\x2d1c642bcfee5e.device.
Both the backslash and the broken symlink causes problems for shell
scripts, [ -e "$file" ] isn't enough and read requires the additional -r
argument to not react on the \.
Add more corner cases from systemd's
unit_name_from_path_instance() C function.
Signed-off-by: Thorsten Behrens <tbehrens@suse.com>
Signed-off-by: Thomas Renninger <trenn@suse.de>
When generating units for devices the administrator might
want to use a different timeout than the default.
So implement a new parameter 'rd.timeout' for this.
References: bnc#878770
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Thomas Renninger <trenn@suse.de>
This mimicks the similar move of os-release which was done in systemd. These
files are not configuration, but part of the OS.
Still symlinks are in place for compatibility, but those should probably be
dropped eventually.
some programs e.g. systemd-journald expect a directory in /var/log as
the marker to do some actions. Here journald tries to flush
/run/log/journal to /var/log/journal, if the directory is seen.
/var/log is now a symlink to /run/initramfs/log.
By convention, strstr should be a literal string match. Previously, it
would match as a glob pattern. Some code used that, so add new
functions strglob and strglobin to do what that code expects, and
specify them tightly too. strglob tests whether the glob pattern
matches the entire string (the name strglob is also used in the yorick
language, and that's what it does there), while strglobin tests whether
the glob pattern matches anywhere in the string.
Also tightens str_starts, str_ends, and str_replace to deal with
literal strings only. In a quick grep I did not find code that depended
on these functions matching globs.
Changes the call sites where strstr was used with glob patterns to use
strglobin or strglob as the intention seemed to be (or, in one case,
strstr with the * removed as it did not affect the result anyway).
It appears there is a simple substitution error in the pidof shell function which causes it to fail to find processes. In my case, processes started by 95nfs are not terminated in the cleanup hook. This causes knock-on effects disturbing the root filesystem service dependencies.
Enjoy,
Stig Telfer
Cached CMDLINE doesn't work 100%. For example the following case,
1. dracut starts to run dracut-cmdline.sh. CMDLINE is cached when calling
getarg 'rd.break=cmdline'.
2. In 92-parse-ibft.sh, ibft_to_cmdline() calls $(set_ifname ibft xx:xx..)
multiple times in each subshell.
3. In 1st call, set_ifname() will check $(getargs ifname) and write out
ifname=xxxx accordingly.
4. In 2nd call, set_ifname() will check $(getargs ifname) and it's wrong here.
Because in step 3, we introduce a new cmdline arg ifname=xxx, but CMDLINE
isn't updated. Thus we fail to get the new ifname arg.
It's doable to unset CMDLINE every time after a new cmdline arg is in. But
unset should be done in the parent process, because unset CMDLINE in a
subshell won't unset CMDLINE in its parent or sibling process. And also it's
painful to unset CMDLINE every time. In the future, functions and code
snippet could probably separate or move to other file, the unset CMDLINE could
malfunction again like this time.
So I'm thinking not to cache CMDLINE. It's doesn't hurt to re-read all the
cmdline args everytime. Because it's in initramfs, a non cached _getcmdline()
should be fast enough.
Please consider!
Thanks
WANG Chao
Currently when action_on_fail is enabled, the emergency_shell won't be called.
In kdump even though user specify the default action as emergency_shell,
dracut skip it. Now change the implementation of action_on_fail to depend
on a file which is created by kdump when making kdump initrd, then remove it
at the beginning of kdump. This can solve the explicit emergency_shell problem.
And action_on_fail won't need paramenters, remove the relevant description in
dracut man page.
Signed-off-by: Baoquan He <bhe@redhat.com>
When dropped to emergency shell, for example, use rd.break=pre-pivot,
the PS1 won't correctly show current directory we're in:
pre-pivot:/# cd /sysroot/
pre-pivot:/#
(still shows "/")
Let's take a look at PS1 variable:
(I'm adding prefix/suffix 'x' to make it clear):
pre-pivot:/# echo x${PS1}x
xpre-pivot:/# x
(PS1 isn't dynamic)
Regarding the current dracut code, it should be:
pre-pivot:/# cd /sysroot/etc
pre-pivot:/sysroot/etc#
With this patch:
pre-pivot:/# echo x${PS1}x
xpre-pivot:${PWD}# x
(Now PS1 is dynamic, it will show the directory correctly)
I tested for both normal boot and kdump boot.
Signed-off-by: WANG Chao <chaowang@redhat.com>
Currently the default action is emergency_shell when failure happened
during system boot. In kdump, this default may not be expected. E.g,
if dump target is not rootfs, it does not matter if mount root failed.
Adding an action which allow dracut always go ahead though failure
happens is needed by kdump.
So here add a function action_on_fail() and cmdline parameter
action_on_fail=<shell | continue>. Use action_to_fail() to replace
emergency_shell which was called after failure. By $(getarg action_on_fail=),
decide to drop into shell, or to leave away the failure and go ahead.
v3->v4:
add handling of selinux policy loaded failure, and change code format to
be consitent
Signed-off-by: Baoquan He <bhe@redhat.com>
[Edited by harald@redhat.com]
For cmdline argument with numeric value, add a new function getargnum
It will get proper value with default value as $1, min value as $2,
max value as $3, and param name as $4. valid result will be echo to stdout.
for nul or value not valid it will just echo the default value.
Note: The values should be >=0
[v1->v2]: add arg <minval>
[v2->v3]: do not use bash string match =~
Signed-off-by: Dave Young <dyoung@redhat.com>
Harald Hoyer