From: Christian Hesse
Linux 5.9 supports zstd compressed initramfs, so add support here.
Signed-off-by: Christian Hesse
---
PKGBUILD | 1 +
lsinitcpio | 4 ++++
man/mkinitcpio.conf.5.txt | 6 +++---
mkinitcpio.conf | 1 +
4 files changed, 9 insertions(+), 3 deletions(-)
diff --git a/PKGBUILD b/PKGBUILD
index 3536a48..c7e1ed5 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -15,6 +15,7 @@ optdepends=('xz: Use lzma or xz compression for the initramfs image'
'bzip2: Use bzip2 compression for the initramfs image'
'lzop: Use lzo compression for the initramfs image'
'lz4: Use lz4 compression for the initramfs image'
+ 'zstd: Use zstd compression for the initramfs image'
'mkinitcpio-nfs-utils: Support for root filesystem on NFS')
backup=(etc/mkinitcpio.conf)
diff --git a/lsinitcpio b/lsinitcpio
index bcb4a19..4715783 100755
--- a/lsinitcpio
+++ b/lsinitcpio
@@ -113,6 +113,10 @@ detect_filetype() {
echo 'lz4 -l'
return
;;
+ fd2fb528)
+ echo 'zstd'
+ return
+ ;;
esac
read -rd '' bytes < <(hexdump -n 3 -e '"%c"' "$1")
diff --git a/man/mkinitcpio.conf.5.txt b/man/mkinitcpio.conf.5.txt
index 9c8d000..9c999d7 100644
--- a/man/mkinitcpio.conf.5.txt
+++ b/man/mkinitcpio.conf.5.txt
@@ -54,9 +54,9 @@ Variables
Defines a program to filter the generated image through. As of linux 2.6.38,
the kernel understands the compression formats yielded by the *gzip*, *bzip2*,
- *lz4*, *lzop*, *lzma*, and *xz* compressors. If unspecified, this setting
- defaults to *gzip* compression. In order to create an uncompressed image, define
- this variable as *cat*.
+ *lz4*, *lzop*, *lzma*, and *xz* compressors. Compression via *zstd* was added
+ in linux 5.9. If unspecified, this setting defaults to *gzip* compression.
+ In order to create an uncompressed image, define this variable as *cat*.
+
It's not hard to realize that a filter such as a *tac* or *rev* will cause
*mkinitcpio* to report success but generate a useless image. Similarly, using a
diff --git a/mkinitcpio.conf b/mkinitcpio.conf
index b926b90..ba1cce3 100644
--- a/mkinitcpio.conf
+++ b/mkinitcpio.conf
@@ -60,6 +60,7 @@ HOOKS=(base udev autodetect modconf block filesystems keyboard fsck)
#COMPRESSION="xz"
#COMPRESSION="lzop"
#COMPRESSION="lz4"
+#COMPRESSION="zstd"
# COMPRESSION_OPTIONS
# Additional options for the compressor