From: swift@world.std.com (Peter Lu) Subject: question/problem using fcntl to change file mode from text to binary 3 Jul 1997 15:33:39 -0700 Approved: cygnus.gnu-win32@cygnus.com Distribution: cygnus Message-ID: <33BC1462.7119.cygnus.gnu-win32@world.std.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Mailer: Mozilla 3.0 (X11; I; HP-UX A.09.07 9000/777) Original-To: gnu-win32@cygnus.com Original-Sender: owner-gnu-win32@cygnus.com Hi, I am having problems using fcntl() to change a file which was opened in text mode that I'd like to use in binary mode. In particular, I'd like to change my standard input and output (fd=0 and fd=1) to binary so that I can create a filter program. Right now, I do: #include ..... flag = fcntl(0, F_GETFL); flag |= _FBINARY; fcntl(0, F_SETFL, flag); ..... but this doesn't seem to work. As a matter of fact, flag seems to retrieve some nonsensible value (perhaps the fd itself). If this doesn't work, how much work-around do I need to do? I read that an open() with O_BINARY would do the trick for new files. Perhaps I'll give fdopen a try. Does fcntl() work right now? Thanks for any help. Please email swift@world.std.com. Peter Lu - For help on using this list (especially unsubscribing), send a message to "gnu-win32-request@cygnus.com" with one line of text: "help".