Os: add Write() method

If we're going to dump log messages, we need to
be able to write to a file descriptor. Plumb up
write(), via Os::Write().

Bug: 31997280
Test: ./runtests.sh

Change-Id: I0ebdf2f33dd1f458116e9bbf51ae82e51d107d42

1 files changed, 5 insertions, 0 deletions

diff --git a/raw_os.cpp b/raw_os.cpp
index 03064d8..694f199 100644
--- a/raw_os.cpp
+++ b/raw_os.cpp
@@ -15,6 +15,7 @@
  */
 
 #include <time.h>
+#include <unistd.h>
 
 #include "wifilogd/raw_os.h"
 
@@ -32,5 +33,9 @@ int RawOs::ClockGettime(clockid_t clock_id, struct timespec* ts) const {
   return clock_gettime(clock_id, ts);
 }
 
+ssize_t RawOs::Write(int fd, const void* buf, size_t buflen) {
+  return write(fd, buf, buflen);
+}
+
 }  // namespace wifilogd
 }  // namespace android