From 1bd3ce48983c66caa6f09948826f741f38dc7af5 Mon Sep 17 00:00:00 2001 From: Bruno Haible Date: Mon, 28 May 2007 13:55:57 +0000 Subject: [PATCH] More comments. --- ChangeLog | 4 ++++ lib/stdio_.h | 6 +++++- 2 files changed, 9 insertions(+), 1 deletion(-) diff --git a/ChangeLog b/ChangeLog index 807c5726e..b1eabf737 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,5 +1,9 @@ 2007-05-28 Bruno Haible + * lib/stdio_.h (fflush): More comments. + +2007-05-28 Bruno Haible + * m4/lseek.m4 (gl_FUNC_LSEEK): When not cross-compiling, perform a real runtime test. diff --git a/lib/stdio_.h b/lib/stdio_.h index 2b920fcd2..a8290ac3a 100644 --- a/lib/stdio_.h +++ b/lib/stdio_.h @@ -270,7 +270,11 @@ extern off_t ftello (FILE *fp); # if @REPLACE_FFLUSH@ # define fflush rpl_fflush /* Flush all pending data on STREAM according to POSIX rules. Both - output and seekable input streams are supported. */ + output and seekable input streams are supported. + Note! LOSS OF DATA can occur if fflush is applied on an input stream + that is _not_seekable_ or on an update stream that is _not_seekable_ + and in which the most recent operation was input. Seekability can + be tested with lseek(fileno(fp),0,SEEK_CUR). */ extern int fflush (FILE *gl_stream); # endif #elif defined GNULIB_POSIXCHECK -- 2.11.0