From eed5052ce855652ed067ea861b588b327535af75 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Ekl=C3=B6f?= <daniel@ekloef.se>
Date: Thu, 20 Feb 2020 18:46:45 +0100
Subject: [PATCH] main: check return value of getcwd()

---
 main.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/main.c b/main.c
index 7709e05c..0e22d0d8 100644
--- a/main.c
+++ b/main.c
@@ -314,10 +314,14 @@ main(int argc, char *const *argv)
 
     char *cwd = NULL;
     {
+        errno = 0;
         size_t buf_len = 1024;
         do {
             cwd = realloc(cwd, buf_len);
-            getcwd(cwd, buf_len);
+            if (getcwd(cwd, buf_len) == NULL && errno != ERANGE) {
+                LOG_ERRNO("failed to get current working directory");
+                goto out;
+            }
             buf_len *= 2;
         } while (errno == ERANGE);
     }