From b7dfb79b53c516e54a8964ba66e207a3bb4db9ee Mon Sep 17 00:00:00 2001
From: Spencer Low <CompareAndSwap@gmail.com>
Date: Fri, 22 May 2015 16:48:31 -0700
Subject: [PATCH] adb: win32: fix exec-in and exec-out to use binary mode

adb exec-in and exec-out are designed to read/write binary data
according to the commit description at:
https://android.googlesource.com/platform/system/core/+/5d9d434%5E!/

On Windows, when adb_read and adb_write are used, they are always in
binary mode (because sysdeps_win32.cpp calls Windows APIs direct). But
unix_read, unix_write, fread, fwrite, read, write use the text
translation mode of the C Runtime file descriptor, which is by default
textmode.

adb exec-in and exec-out use copy_to_file() which uses unix_read() and
fwrite() when reading/writing stdin and stdout, thus, copy_to_file()
should switch to binary mode for those cases (it already uses binary
mode for file descriptors other than stdin and stdout).

copy_to_file() is also called by adb backup, adb restore, and adb
install-multiple, but those do not use stdin or stdout, so those
codepaths should not be affected by this change.

Change-Id: I3446d9b363d20a2c2f6be2b96e55b653d99df2f9
Signed-off-by: Spencer Low <CompareAndSwap@gmail.com>
---
 adb/commandline.cpp | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/adb/commandline.cpp b/adb/commandline.cpp
index 7fbca3155..c1375b315 100644
--- a/adb/commandline.cpp
+++ b/adb/commandline.cpp
@@ -302,13 +302,32 @@ static void copy_to_file(int inFd, int outFd) {
     if (buf == nullptr) fatal("couldn't allocate buffer for copy_to_file");
     int len;
     long total = 0;
+#ifdef _WIN32
+    int old_stdin_mode = -1;
+    int old_stdout_mode = -1;
+#endif
 
     D("copy_to_file(%d -> %d)\n", inFd, outFd);
 
     if (inFd == STDIN_FILENO) {
         stdin_raw_init(STDIN_FILENO);
+#ifdef _WIN32
+        old_stdin_mode = _setmode(STDIN_FILENO, _O_BINARY);
+        if (old_stdin_mode == -1) {
+            fatal_errno("could not set stdin to binary");
+        }
+#endif
     }
 
+#ifdef _WIN32
+    if (outFd == STDOUT_FILENO) {
+        old_stdout_mode = _setmode(STDOUT_FILENO, _O_BINARY);
+        if (old_stdout_mode == -1) {
+            fatal_errno("could not set stdout to binary");
+        }
+    }
+#endif
+
     while (true) {
         if (inFd == STDIN_FILENO) {
             len = unix_read(inFd, buf, BUFSIZE);
@@ -338,8 +357,21 @@ static void copy_to_file(int inFd, int outFd) {
 
     if (inFd == STDIN_FILENO) {
         stdin_raw_restore(STDIN_FILENO);
+#ifdef _WIN32
+        if (_setmode(STDIN_FILENO, old_stdin_mode) == -1) {
+            fatal_errno("could not restore stdin mode");
+        }
+#endif
     }
 
+#ifdef _WIN32
+    if (outFd == STDOUT_FILENO) {
+        if (_setmode(STDOUT_FILENO, old_stdout_mode) == -1) {
+            fatal_errno("could not restore stdout mode");
+        }
+    }
+#endif
+
     D("copy_to_file() finished after %lu bytes\n", total);
     free(buf);
 }