From 88c997d4eb6f66f9b52e56668cbdf48f5c99e183 Mon Sep 17 00:00:00 2001
From: Robert Yang <decatf@gmail.com>
Date: Wed, 24 Oct 2018 13:07:50 -0400
Subject: [PATCH] adb: Use a default _SC_GETPW_R_SIZE_MAX size
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sysconf(_SC_GETPW_R_SIZE_MAX) may return −1 if there is no hard limit
on the the buffer size. Some libc implementations such as musl don't
define this limit and will return -1.

Use a default buffer size to handle this case.

Change-Id: I997b13a2c2dca00574e049a259135e61c8ed8e03
Signed-off-by: Robert Yang <decatf@gmail.com>
---
 adb/adb_utils.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/adb/adb_utils.cpp b/adb/adb_utils.cpp
index ad7706466..69603455a 100644
--- a/adb/adb_utils.cpp
+++ b/adb/adb_utils.cpp
@@ -293,6 +293,9 @@ std::string adb_get_homedir_path() {
     struct passwd pwent;
     struct passwd* result;
     int pwent_max = sysconf(_SC_GETPW_R_SIZE_MAX);
+    if (pwent_max == -1) {
+        pwent_max = 16384;
+    }
     std::vector<char> buf(pwent_max);
     int rc = getpwuid_r(getuid(), &pwent, buf.data(), buf.size(), &result);
     if (rc == 0 && result) {