From 9068f348d75ba09e1300460afd70bc678d82c6ce Mon Sep 17 00:00:00 2001
From: Elliott Hughes <enh@google.com>
Date: Wed, 1 Nov 2017 11:09:42 -0700
Subject: file(1): add ogg, TrueType font, LLVM bitcode, PEM certs, and PE
 executables.

More of the files encountered on the Android system image (plus PE
executables, which we build but which shouldn't actually make it to the
system image!).
---
 toys/posix/file.c | 43 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/toys/posix/file.c b/toys/posix/file.c
index 2f1e95ba..5e5c15bc 100644
--- a/toys/posix/file.c
+++ b/toys/posix/file.c
@@ -270,6 +270,49 @@ static void do_regular_file(int fd, char *name, struct stat *sb)
     else what = NULL;
     if (what) xprintf("%s\n", what);
     else xprintf("(bad type %d)\n", s[9]);
+  } else if (len>36 && !memcmp(s, "OggS\x00\x02", 6)) {
+    xprintf("Ogg data");
+    // https://wiki.xiph.org/MIMETypesCodecs
+    if (!memcmp(s+28, "CELT    ", 8)) xprintf(", celt audio");
+    if (!memcmp(s+28, "CMML    ", 8)) xprintf(", cmml text");
+    if (!memcmp(s+28, "BBCD\0", 5)) xprintf(", dirac video");
+    if (!memcmp(s+28, "\177FLAC", 5)) xprintf(", flac audio");
+    if (!memcmp(s+28, "\x8bJNG\r\n\x1a\n", 8)) xprintf(", jng video");
+    if (!memcmp(s+28, "\x80kate\0\0\0", 8)) xprintf(", kate text");
+    if (!memcmp(s+28, "OggMIDI\0", 8)) xprintf(", midi text");
+    if (!memcmp(s+28, "\x8aMNG\r\n\x1a\n", 8)) xprintf(", mng video");
+    if (!memcmp(s+28, "OpusHead", 8)) xprintf(", opus audio");
+    if (!memcmp(s+28, "PCM     ", 8)) xprintf(", pcm audio");
+    if (!memcmp(s+28, "\x89PNG\r\n\x1a\n", 8)) xprintf(", png video");
+    if (!memcmp(s+28, "Speex   ", 8)) xprintf(", speex audio");
+    if (!memcmp(s+28, "\x80theora", 7)) xprintf(", theora video");
+    if (!memcmp(s+28, "\x01vorbis", 7)) xprintf(", vorbis audio");
+    if (!memcmp(s+28, "YUV4MPEG", 8)) xprintf(", yuv4mpeg video");
+    xputc('\n');
+  } else if (len>12 && !memcmp(s, "\x00\x01\x00\x00", 4)) {
+    xputs("TrueType font");
+  } else if (len>12 && !memcmp(s, "ttcf\x00", 5)) {
+    xprintf("TrueType font collection, version %d, %d fonts\n",
+            (int)peek_be(s+4, 2), (int)peek_be(s+8, 4));
+  } else if (len>4 && !memcmp(s, "BC\xc0\xde", 4)) {
+    xputs("LLVM IR bitcode");
+  } else if (strstart(&s, "-----BEGIN CERTIFICATE-----")) {
+    xputs("PEM certificate");
+
+  // https://msdn.microsoft.com/en-us/library/windows/desktop/ms680547(v=vs.85).aspx
+  } else if (len>0x70 && !memcmp(s, "MZ", 2) &&
+      (magic=peek_le(s+0x3c,4))<len-4 && !memcmp(s+magic, "\x50\x45\0\0", 4)) {
+    xprintf("MS PE32%s executable %s", (peek_le(s+magic+24, 2)==0x20b)?"+":"",
+        (peek_le(s+magic+22, 2)&0x2000)?"(DLL) ":"");
+    if (peek_le(s+magic+20, 2)>70) {
+      char *types[] = {0, "native", "GUI", "console", "OS/2", "driver", "CE",
+          "EFI", "EFI boot", "EFI runtime", "EFI ROM", "XBOX", 0, "boot"};
+      int type = peek_le(s+magic+92, 2);
+      char *name = (type>0 && type<ARRAY_LEN(types))?types[type]:0;
+
+      xprintf("(%s) ", name?name:"unknown");
+    }
+    xprintf("%s\n", (peek_le(s+magic+4, 2)==0x14c)?"x86":"x86-64");
   } else {
     char *what = 0;
     int i, bytes;
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