change value of position after seeking

1 files changed, 4 insertions, 4 deletions

diff --git a/src/library_fs.js b/src/library_fs.js
index 1fff6348..d825892c 100644
--- a/src/library_fs.js
+++ b/src/library_fs.js
@@ -1077,6 +1077,10 @@ mergeInto(LibraryManager.library, {
       if (!stream.stream_ops.write) {
         throw new FS.ErrnoError(ERRNO_CODES.EINVAL);
       }
+      if (stream.flags & {{{ cDefine('O_APPEND') }}}) {
+        // seek to the end before writing in append mode
+        FS.llseek(stream, 0, {{{ cDefine('SEEK_END') }}});
+      }
       var seeking = true;
       if (typeof position === 'undefined') {
         position = stream.position;
@@ -1084,10 +1088,6 @@ mergeInto(LibraryManager.library, {
       } else if (!stream.seekable) {
         throw new FS.ErrnoError(ERRNO_CODES.ESPIPE);
       }
-      if (stream.flags & {{{ cDefine('O_APPEND') }}}) {
-        // seek to the end before writing in append mode
-        FS.llseek(stream, 0, {{{ cDefine('SEEK_END') }}});
-      }
       var bytesWritten = stream.stream_ops.write(stream, buffer, offset, length, position, canOwn);
       if (!seeking) stream.position += bytesWritten;
       try {