Fix FS::File::flush() on SD card.

everslick · everslick · commit 5f82d6780195 · 2019-03-19T09:15:30.000+01:00
espressif/arduino-esp32#1293
diff --git a/libraries/FS/src/vfs_api.cpp b/libraries/FS/src/vfs_api.cpp
@@ -340,6 +340,9 @@ void VFSFileImpl::flush()
         return;
     }
     fflush(_f);
+
+    // workaround for https://github.com/espressif/arduino-esp32/issues/1293
+    fsync(fileno(_f));
 }
 
 bool VFSFileImpl::seek(uint32_t pos, SeekMode mode)

Original file line number	Diff line number	Diff line change
`@@ -340,6 +340,9 @@ void VFSFileImpl::flush()`
`340`	`340`	`return;`
`341`	`341`	`}`
`342`	`342`	`fflush(_f);`
	`343`	`+`
	`344`	`+ // workaround for https://github.com/espressif/arduino-esp32/issues/1293`
	`345`	`+ fsync(fileno(_f));`
`343`	`346`	`}`
`344`	`347`
`345`	`348`	`bool VFSFileImpl::seek(uint32_t pos, SeekMode mode)`