Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com X-Injected-Via-Gmane: http://gmane.org/ To: cygwin@cygwin.com From: Sam Steingold Subject: Re: isatty bug Date: 16 Sep 2003 10:42:49 -0400 Organization: disorganization Lines: 55 Message-ID: References: <20030916100108.GO9981@cygbert.vinschen.de> Reply-To: sds@gnu.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Complaints-To: usenet@sea.gmane.org X-Attribution: Sam X-Disclaimer: You should not expect anyone to agree with me. User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3.50 >* Corinna Vinschen [2003-09-16 12:01:08 +0200]: > > On Mon, Sep 15, 2003 at 05:19:16PM -0400, Sam Steingold wrote: > > calling isatty(0) in a program results in a segfault: > And the version number of the DLL is ... 1.5.4(0.94/3/2) > Fd 0 is a tty, a console window, a tape drive, a ... I am doing this in a windows console, as created by clicking on the cygwin icon, i.e., in the bash shell. I assume that 0 means stdin. > Reproducible testcase is ... ------- scratch.c ---- #include int main (void) { #define Y_N(x) ((x) ? "(TTY)" : "(not a TTY)") printf("0: %s %s\n1: %s %s\n2: %s %s\n", ttyname(0),Y_N(isatty(0)),ttyname(1),Y_N(isatty(1)), ttyname(2),Y_N(isatty(2))) #undef Y_N return 0; } ------- scratch.c ---- $ gdb scratch GNU gdb 2003-09-02-cvs (cygwin-special) Copyright 2003 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "i686-pc-cygwin"... (gdb) run tty Starting program: /cygdrive/d/sds/c/scratch.exe tty Program received signal SIGSEGV, Segmentation fault. 0x00000000 in ?? () from (gdb) where #0 0x00000000 in ?? () from (gdb) p isatty(1) Segmentation fault (core dumped) $ same for ttyname(0) &c. -- Sam Steingold (http://www.podval.org/~sds) running w2k Between grand theft and a legal fee, there only stands a law degree. -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/