--- /dev/null
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+
+#include <errno.h>
+#include <unistd.h>
+
+#include <ccan/talloc/talloc.h>
+#include <ccan/grab_file/grab_file.h>
+#include <ccan/rfc822/rfc822.h>
+
+static void process_file(const char *name)
+{
+ void *ctx = talloc_new(NULL);
+ size_t size;
+ void *buf;
+ struct rfc822_msg *msg;
+ struct rfc822_header *hdr;
+
+ buf = grab_file(ctx, name, &size);
+
+ msg = rfc822_start(ctx, buf, size);
+
+ rfc822_for_each_header(msg, hdr) {
+ struct bytestring hname = rfc822_header_raw_name(msg, hdr);
+
+ printf("%.*s\n", hname.len, hname.ptr);
+ }
+
+ talloc_free(ctx);
+}
+
+int main(int argc, char *argv[])
+{
+ int i;
+
+ for (i = 0; i < (argc - 1); i++)
+ process_file(argv[i + 1]);
+
+ exit(0);
+}