Changeset 2f72c67a in mainline

Timestamp:

2011-09-14T21:04:01Z (13 years ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

c82047d

Parents:

05fb96b

Message:

_fflushbuf() must reset buffer head and tail even when bytes_used == 0.

File:

• uspace/lib/c/generic/io/io.c (modified) (1 diff)

uspace/lib/c/generic/io/io.c

@@ -418 +418 @@
 
         bytes_used = stream->buf_head - stream->buf_tail;
-        if (bytes_used == 0)
-                return;
 
         /* If buffer has prefetched read data, we need to seek back. */
-        if (stream->buf_state == _bs_read)
+        if (bytes_used > 0 && stream->buf_state == _bs_read)
                 lseek(stream->fd, - (ssize_t) bytes_used, SEEK_CUR);
 
         /* If buffer has unwritten data, we need to write them out. */
-        if (stream->buf_state == _bs_write)
+        if (bytes_used > 0 && stream->buf_state == _bs_write)
                 (void) _fwrite(stream->buf_tail, 1, bytes_used, stream);