CPIO support

bojand · Nov 21, 2022 · 01bdb18 · 01bdb18
1 parent 84d6e80
commit 01bdb18
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Showing 4 changed files with 22 additions and 0 deletions.
diff --git 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
@@ -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
diff --git 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");