From 01bdb180a3f8db32f83a8820b738c128ebfa9786 Mon Sep 17 00:00:00 2001
From: Lynnesbian <lynne@bune.city>
Date: Mon, 21 Nov 2022 11:51:45 +1000
Subject: [PATCH 1/2] CPIO support

---
 src/map.rs              |   6 ++++++
 src/matchers/archive.rs |  14 ++++++++++++++
 testdata/sample.cpio    | Bin 0 -> 1024 bytes
 tests/archive.rs        |   2 ++
 4 files changed, 22 insertions(+)
 create mode 100644 testdata/sample.cpio

diff --git a/src/map.rs b/src/map.rs
index 1d92627..05e16a6 100644
--- a/src/map.rs
+++ b/src/map.rs
@@ -564,6 +564,12 @@ matcher_map!(
         "msi",
         matchers::archive::is_msi
     ),
+    (
+        MatcherType::Archive,
+        "application/x-cpio",
+        "cpio",
+        matchers::archive::is_cpio
+    ),
     // Text
     (
         MatcherType::Text,
diff --git a/src/matchers/archive.rs b/src/matchers/archive.rs
index 710ab99..3e6c53e 100644
--- a/src/matchers/archive.rs
+++ b/src/matchers/archive.rs
@@ -216,3 +216,17 @@ pub fn is_msi(buf: &[u8]) -> bool {
         && buf[6] == 0x1A
         && buf[7] == 0xE1
 }
+
+/// Returns whether a buffer is a CPIO archive.
+pub fn is_cpio(buf: &[u8]) -> bool {
+    (buf.len() > 1
+        && ((buf[0] == 0xC7 && buf[1] == 0x71) // little endian, old format
+        || (buf[0] == 0x71 && buf[1] == 0xC7))) // big endian, old format
+    || (buf.len() > 6
+        && buf[0] == 0x30
+        && buf[1] == 0x37
+        && buf[2] == 0x30
+        && buf[3] == 0x37
+        && buf[4] == 0x30
+        && buf[5] == 0x31) // newc format
+}
diff --git a/testdata/sample.cpio b/testdata/sample.cpio
new file mode 100644
index 0000000000000000000000000000000000000000..ea1b8bd6925d3d5ace1f0441557b80d0ac43d4e4
GIT binary patch
literal 1024
zcmcgrO^?$s5asM&;rhHyoVME*1c>gohn3h%*;`a0$DXEU<2cw3Y_;OQGftX9IrYRG
zJf838r!imf1<&|=eLtJeHXLP{t!7d4>1KJMInU<P#cF*!>HU+pw_W^vOs41S<>hWL
z?}aOE60E7-pyZ8^&!U7Ksf7Xhfihk1!7=g!oY%IF9-d@b!Wj{5I9TV=m9snhP1N+g
zDx&^W8lkI1TJw?Z2q+y+l@p#V8ByS+)6L-gVnkI@=|lh;EbZpey{^zYHb4vEK~bD+
zM5!gMTT_6eUYE59tpm?Ur6tt91N->!#K<!oe_E${U|rR?uVOcp#m2F3yc=!KdK{fT
zdTaaD2Zg{L2-S12-K^G+o5Uza4%R?}1VthaAvFG7nwB~o+9JL;?cT4_6KM__>vgd1
zcvZTxvNcc#F;FuMz<^JjAKJo;tXdTz<SY$<XhjeadS`fqPVznU^z4xCy=be@W%m!m
zv$K$QD`TD97g*GpF%au>coC+lVE1PeB6W;3A{;P@o#H-?ZUo1WukWpPpvJ@OzebW=
zK?AjdT59k+f)g?NN-x%Gfm?M$ZMPYs!gz2k&|d`i5`RSe6W7VLdH;4h|B0vV>f!Td
MI~tARpZMSM8_=K$xc~qF

literal 0
HcmV?d00001

diff --git a/tests/archive.rs b/tests/archive.rs
index f2f1e1d..37c8e5a 100644
--- a/tests/archive.rs
+++ b/tests/archive.rs
@@ -9,3 +9,5 @@ test_format!(
 );
 
 test_format!(Archive, "application/zstd", "zst", zst, "sample.tar.zst");
+
+test_format!(Archive, "application/x-cpio", "cpio", cpio, "sample.cpio");

From 0e6dacb245957569f0aeab713e694be5073ce27a Mon Sep 17 00:00:00 2001
From: Lynnesbian <lynne@bune.city>
Date: Mon, 21 Nov 2022 14:27:10 +1000
Subject: [PATCH 2/2] add CPIO to README

---
 README.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/README.md b/README.md
index 69d8f7e..ad05b93 100644
--- a/README.md
+++ b/README.md
@@ -174,6 +174,7 @@ assert_eq!(kind.extension(), "foo");
 - **dcm** - `application/dicom`
 - **zst** - `application/zstd`
 - **msi** - `application/x-ole-storage`
+- **cpio** - `application/x-cpio`
 
 #### Book