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grub2/grub2-efi-xen-cfg-unquote.patch
Michael Chang 957b4bf706 Accepting request 1191065 from home:gary_lin:branches:Base:System
- Switch to '--no-hostonly' when creating the ZIPL initrd in the
  KIWI build environment to avoid some potential issues due to the
  missing modules
  * grub2-s390x-set-hostonly.patch

OBS-URL: https://build.opensuse.org/request/show/1191065
OBS-URL: https://build.opensuse.org/package/show/Base:System/grub2?expand=0&rev=510
2024-08-02 08:19:09 +00:00

91 lines
2.6 KiB
Diff

From: Petr Tesarik <ptesarik@suse.cz>
Subject: Unquote parameters written to Xen EFI config file
References: bsc#900418
Patch-mainline: not yet
The GRUB_CMDLINE_* value is copied verbatim to grub.conf, so it is first
parsed by GRUB2 before being passed down to the kernel. OTOH Xen EFI loader
takes the config file options verbatim. This means that any special GRUB2
syntax must be evaluated when generating that file.
Of course, some things are not even possible (e.g. substituting GRUB runtime
variables), but let's call them known limitations.
Signed-off-by: Petr Tesarik <ptesarik@suse.cz>
---
util/grub.d/20_linux_xen.in | 54 ++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 52 insertions(+), 2 deletions(-)
--- a/util/grub.d/20_linux_xen.in
+++ b/util/grub.d/20_linux_xen.in
@@ -139,6 +139,52 @@
is_efi=false
fi
+grub2_unquote ()
+{
+ awk '
+ BEGIN {
+ bare = "[^{}|&$;<> \t\n'\''\"\\\\]+"
+ esc = "\\\\."
+ id = "[[:alpha:]_][[:alnum:]_]*|[[:digit:]]+|[?#*@]"
+ var = "\\$("id")|\\$\\{("id")\\}"
+ dqesc = "\\\\[$\"\\\\]"
+ dqstr = "\\$?\"([^\"]|"var"|"dqesc")*\""
+ sqstr = "'\''[^'\'']*'\''"
+ pat = bare"|"esc"|"var"|"dqstr"|"sqstr
+ ORS = ""
+ }
+ {
+ patsplit($0, words, pat, sep)
+ print sep[0]
+ for (i in words) {
+ w = words[i]
+ if (w ~ /^\$?"/) {
+ # Double-quoted string
+ patsplit(w, segs, var"|"dqesc, ssep)
+ print ssep[0]
+ for (j in segs) {
+ if (segs[j] ~ /^\\/)
+ print substr(segs[j], 2)
+ print ssep[j]
+ }
+ } else if (w ~ /^'\''/) {
+ # Single-quoted string
+ print substr(w, 2, length(w)-2)
+ } else if (w ~ /^\\/) {
+ # Escape sequence
+ print substr(w, 2)
+ } else if (w ~ /^\$/) {
+ # Variable expansion
+ } else {
+ # Bare word
+ print w
+ }
+ print sep[i]
+ }
+ print "\n"
+ }'
+}
+
linux_entry ()
{
linux_entry_xsm "$@" false
@@ -209,11 +255,13 @@
else
section="failsafe.$section_count"
fi
+ xen_args_unq=$(echo $xen_args | grub2_unquote)
+ args_unq=$(echo $args | grub2_unquote)
cat <<-EOF >> $grub_dir/$xen_cfg
[$section]
- options=${xen_args}
- kernel=${basename} root=${linux_root_device_thisversion} ${args}
+ options=${xen_args_unq}
+ kernel=${basename} root=${linux_root_device_thisversion} ${args_unq}
ramdisk=${initrd_real}
EOF
message="$(gettext_printf "Loading Xen %s with Linux %s ..." ${xen_version} ${version})"