commit 816dc65482b52c96c56a51b75215584b84eda1ee
from: Stefan Sperling <stsp@stsp.name>
date: Sat Feb 16 12:45:15 2019 UTC

check for errors from fsync(2)

commit - 5ea74b5a394cdadfb08905818a3bd053c5e06dfb
commit + 816dc65482b52c96c56a51b75215584b84eda1ee
blob - 37c8744b87c5306d5226f968dcaefb4cc5bdd970
blob + 28e60df1feddc66aaa4be09871a80d53f3834ae8
--- lib/worktree.c
+++ lib/worktree.c
@@ -663,7 +663,10 @@ merge_blob(struct got_worktree *worktree, struct got_f
 	    overlapcnt > 0 ? GOT_STATUS_CONFLICT : GOT_STATUS_MERGE, path);
 
 
-	fsync(merged_fd);
+	if (fsync(merged_fd) != 0) {
+		err = got_error_from_errno();
+		goto done;
+	}
 
 	if (rename(merged_path, ondisk_path) != 0) {
 		err = got_error_from_errno();
@@ -769,7 +772,10 @@ install_blob(struct got_worktree *worktree, struct got
 		}
 	} while (len != 0);
 
-	fsync(fd);
+	if (fsync(fd) != 0) {
+		err = got_error_from_errno();
+		goto done;
+	}
 
 	if (update) {
 		if (rename(tmppath, ondisk_path) != 0) {