From: Danny Milosavljevic <dannym@scratchpost.org>
To: 44507@debbugs.gnu.org
Cc: Danny Milosavljevic <dannym@scratchpost.org>
Subject: [bug#44507] [PATCH 2/3] linux-initrd: Add special-file->cpio-header*
Date: Sat, 7 Nov 2020 22:27:32 +0100 [thread overview]
Message-ID: <20201107212733.22326-2-dannym@scratchpost.org> (raw)
In-Reply-To: <20201107212733.22326-1-dannym@scratchpost.org>
* guix/cpio.scm (special-file->cpio-header*): New public procedure.
---
guix/cpio.scm | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/guix/cpio.scm b/guix/cpio.scm
index 5d38573971..c9932f5bf9 100644
--- a/guix/cpio.scm
+++ b/guix/cpio.scm
@@ -27,6 +27,7 @@
make-cpio-header
file->cpio-header
file->cpio-header*
+ special-file->cpio-header*
write-cpio-header
read-cpio-header
@@ -190,6 +191,25 @@ produced in a deterministic fashion."
#:size (stat:size st)
#:name-size (string-length file-name))))
+(define* (special-file->cpio-header* file
+ device-type
+ device-major
+ device-minor
+ permission-bits
+ #:optional (file-name file))
+ "Create a character or block device header.
+
+DEVICE-TYPE is either 'char-special or 'block-special.
+
+The number of hard links is assumed to be 1."
+ (make-cpio-header #:mode (logior (match device-type
+ ('block-special C_ISBLK)
+ ('char-special C_ISCHR))
+ permission-bits)
+ #:nlink 1
+ #:rdev (device-number device-major device-minor)
+ #:name-size (string-length file-name)))
+
(define %trailer
"TRAILER!!!")
next prev parent reply other threads:[~2020-11-07 21:28 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-07 20:47 [bug#44507] [PATCH 0/3] Create "dev.cpio" for Heads Danny Milosavljevic
2020-11-07 21:27 ` [bug#44507] [PATCH 1/3] linux-initrd: Handle 'block-special and 'char-special cpio headers as well Danny Milosavljevic
2020-11-07 21:27 ` Danny Milosavljevic [this message]
2020-11-07 21:27 ` [bug#44507] [PATCH 3/3] gnu: Add heads-dev-cpio Danny Milosavljevic
2020-11-22 10:07 ` bug#44507: [PATCH 0/3] Create "dev.cpio" for Heads Danny Milosavljevic
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