[patch] rpmoffset.c.patch

rpmoffset.c.patch (text/plain), 1017 bytes, created by Peter Volkov (RETIRED) on 2010-05-25 11:55:52 UTC

diff --git a/rpmoffset.c b/rpmoffset.c
index 0a3c488..e472f82 100644
--- a/rpmoffset.c
+++ b/rpmoffset.c
@@ -25,6 +25,14 @@ typedef struct {
 	const size_t len;
 } magic_t;
 
+int is_lzma_header(char *buf) {
+	return (buf[0] < 0xE1
+		&& buf[0] == 0x5d
+		&& buf[4] < 0x20
+		&& (memcmp (buf + 10 , "\x00\x00\x00", 3) == 0
+		    || (memcmp (buf + 5, "\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF", 8) == 0)));
+}
+
 static const unsigned char magic_gzip[]  = { '\037', '\213', '\010' };
 static const unsigned char magic_bzip2[] = { 'B', 'Z', 'h' };
 static const unsigned char magic_xz[]    = { 0xFD, '7', 'z', 'X', 'Z', 0x00 };
@@ -76,6 +84,15 @@ int main(int argc, char *argv[])
 				return 0;
 			}
 		}
+        
+        for (i = 0; i < read_cnt; i++) {
+            if (read_cnt + left > 10 && is_lzma_header(p+i)) {
+		    	if (show_magic)
+		    		printf("lzma ");
+		    	printf("%zu\n", offset+i);
+		    	return 0;
+		    }
+        }
 
 		memmove(p, p + left + read_cnt - MAGIC_SIZE_MIN + 1, MAGIC_SIZE_MIN - 1);