Add .bmp supoprt to file(1).

1 files changed, 6 insertions, 0 deletions

diff --git a/toys/posix/file.c b/toys/posix/file.c
index 552cd03f..4df0bc60 100644
--- a/toys/posix/file.c
+++ b/toys/posix/file.c
@@ -368,6 +368,12 @@ static void do_regular_file(int fd, char *name)
       xprintf("(%s) ", name?name:"unknown");
     }
     xprintf("%s\n", (peek_le(s+magic+4, 2)==0x14c)?"x86":"x86-64");
+
+    // https://en.wikipedia.org/wiki/BMP_file_format
+  } else if (len > 0x32 && !memcmp(s, "BM", 2) && !memcmp(s+6, "\0\0\0\0", 4)) {
+    int w = peek_le(s+0x12,4), h = peek_le(s+0x16,4), bpp = peek_le(s+0x1c,2);
+
+    xprintf("BMP image, %d x %d, %d bpp, %s\n", w, h, bpp);
   } else {
     char *what = 0;
     int i, bytes;