diff options
Diffstat (limited to 'lib/libc/stdio/fflush.c')
| -rw-r--r-- | lib/libc/stdio/fflush.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/libc/stdio/fflush.c b/lib/libc/stdio/fflush.c index 5c1eaa1..55a6a2a 100644 --- a/lib/libc/stdio/fflush.c +++ b/lib/libc/stdio/fflush.c @@ -113,9 +113,15 @@ __sflush(FILE *fp) fp->_p = p; fp->_w = t & (__SLBF|__SNBF) ? 0 : fp->_bf._size; + if (n <= 0) + return (0); + if ((fp->_flags & __SAPP) && _sseek(fp, (fpos_t)0, SEEK_END) == -1) + goto err; + fp->_flags &= ~__SOFF; /* In case FAPPEND mode is set. */ for (; n > 0; n -= t, p += t) { t = (*fp->_write)(fp->_cookie, (char *)p, n); if (t <= 0) { + err: fp->_flags |= __SERR; return (EOF); } |
