diff options
Diffstat (limited to 'newlib/libc')
| -rw-r--r-- | newlib/libc/stdio/fflush.c | 2 | ||||
| -rw-r--r-- | newlib/libc/stdio/ftell.c | 9 | ||||
| -rw-r--r-- | newlib/libc/stdio64/ftello64.c | 9 |
3 files changed, 14 insertions, 6 deletions
diff --git a/newlib/libc/stdio/fflush.c b/newlib/libc/stdio/fflush.c index 24bd6c10e..33e2e7b26 100644 --- a/newlib/libc/stdio/fflush.c +++ b/newlib/libc/stdio/fflush.c @@ -164,6 +164,8 @@ _DEFUN(_fflush_r, (ptr, fp), fp->_p = fp->_bf._base; if (fp->_flags & __SOFF) fp->_offset = curoff; + if (HASUB (fp)) + FREEUB (ptr, fp); } else { diff --git a/newlib/libc/stdio/ftell.c b/newlib/libc/stdio/ftell.c index 2aa10b2c7..816cafa76 100644 --- a/newlib/libc/stdio/ftell.c +++ b/newlib/libc/stdio/ftell.c @@ -118,9 +118,12 @@ _DEFUN(_ftell_r, (ptr, fp), return -1L; } - /* Find offset of underlying I/O object, then - adjust for buffered bytes. */ - _fflush_r (ptr, fp); /* may adjust seek offset on append stream */ + /* Find offset of underlying I/O object, then adjust for buffered + bytes. Flush a write stream, since the offset may be altered if + the stream is appending. Do not flush a read stream, since we + must not lose the ungetc buffer. */ + if (fp->_flags & __SWR) + _fflush_r (ptr, fp); if (fp->_flags & __SOFF) pos = fp->_offset; else diff --git a/newlib/libc/stdio64/ftello64.c b/newlib/libc/stdio64/ftello64.c index 2fdfb784e..51dcd2796 100644 --- a/newlib/libc/stdio64/ftello64.c +++ b/newlib/libc/stdio64/ftello64.c @@ -108,9 +108,12 @@ _DEFUN (_ftello64_r, (ptr, fp), return -1L; } - /* Find offset of underlying I/O object, then - adjust for buffered bytes. */ - _fflush_r (ptr, fp); /* may adjust seek offset on append stream */ + /* Find offset of underlying I/O object, then adjust for buffered + bytes. Flush a write stream, since the offset may be altered if + the stream is appending. Do not flush a read stream, since we + must not lose the ungetc buffer. */ + if (fp->_flags & __SWR) + _fflush_r (ptr, fp); if (fp->_flags & __SOFF) pos = fp->_offset; else |