From: Carl Hetherington <cth@carlh.net>
Date: Mon, 19 Apr 2021 20:22:50 +0000 (+0200)
Subject: Sleep for a while if necessary to allow disks to wake up (#1916).
X-Git-Tag: v2.15.141~59
X-Git-Url: https://git.carlh.net/gitweb/?p=dcpomatic.git;a=commitdiff_plain;h=e5ad3fb4402d7df52c346408cbacbf68af4fa05a

Sleep for a while if necessary to allow disks to wake up (#1916).
---

diff --git a/src/lib/ext.cc b/src/lib/ext.cc
index b88a88726..39c90ae12 100644
--- a/src/lib/ext.cc
+++ b/src/lib/ext.cc
@@ -331,6 +331,18 @@ try
 	file_windows_partition_set (bdevs.partitions[0].part_offset, bdevs.partitions[0].part_size);
 #else
 	file_dev_name_set (posix_partition.c_str());
+
+	/* On macOS (at least) if you try to write to a drive that is sleeping the ext4_mkfs call
+	 * below is liable to return EIO because it can't open the device.  Try to work around that
+	 * here by opening and closing the device, waiting 5 seconds if it fails.
+	 */
+	int wake = open(posix_partition.c_str(), O_RDWR);
+	if (wake == -1) {
+		dcpomatic_sleep_seconds (5);
+	} else {
+		close(wake);
+	}
+
 	bd = file_dev_get ();
 #endif