From 27ded4832d7a1b93d287ea9b968bf069d3628a8b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Florian=20B=C3=A4uerle?= <florian.baeuerle@esolutions.de>
Date: Mon, 24 Nov 2014 11:29:34 +0100
Subject: [PATCH] fastboot: add parameter for unbuffered stderr/stdout
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

This is useful for writing Windows GUIs that want to parse the output of
fastboot before it exits.

Change-Id: Ic0171fe379fc4db7b65b1501e5f2e771ac7c62c4
Signed-off-by: Florian Bäuerle <florian.bae@gmail.com>
---
 fastboot/fastboot.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/fastboot/fastboot.c b/fastboot/fastboot.c
index 43d05aa3e..13425e68a 100644
--- a/fastboot/fastboot.c
+++ b/fastboot/fastboot.c
@@ -988,6 +988,7 @@ int main(int argc, char **argv)
     unsigned sz;
     int status;
     int c;
+    int longindex;
 
     const struct option longopts[] = {
         {"base", required_argument, 0, 'b'},
@@ -996,13 +997,14 @@ int main(int argc, char **argv)
         {"ramdisk_offset", required_argument, 0, 'r'},
         {"tags_offset", required_argument, 0, 't'},
         {"help", 0, 0, 'h'},
+        {"unbuffered", 0, 0, 0},
         {0, 0, 0, 0}
     };
 
     serial = getenv("ANDROID_SERIAL");
 
     while (1) {
-        c = getopt_long(argc, argv, "wub:k:n:r:t:s:S:lp:c:i:m:h", longopts, NULL);
+        c = getopt_long(argc, argv, "wub:k:n:r:t:s:S:lp:c:i:m:h", longopts, &longindex);
         if (c < 0) {
             break;
         }
@@ -1063,6 +1065,12 @@ int main(int argc, char **argv)
             break;
         case '?':
             return 1;
+        case 0:
+            if (strcmp("unbuffered", longopts[longindex].name) == 0) {
+                setvbuf(stdout, NULL, _IONBF, 0);
+                setvbuf(stderr, NULL, _IONBF, 0);
+            }
+            break;
         default:
             abort();
         }