On 10/9/2011 4:10 PM, jan.kolar wrote:
Ken Brown-6 wrote:The attached STC arose from my attempt to understand the problem discussed starting in http://cygwin.com/ml/cygwin/2011-09/msg00405.html . I'm starting a new thread because there appears to be a Cygwin problem having nothing to do with emacs. The STC creates a pipe and then runs `bash -ic ls' in a subprocess, with both stdout and stderr sent to the pipe. The parent process reads from the pipe and echoes it to the terminal. On Linux, I first get the error messages (presumably expected) bash: cannot set terminal process group (-1): Invalid argument bash: no job control in this shell followed by the directory listing. On Cygwin, the bash process produces no output but is simply stopped, and I have to kill it from another terminal before the main program will exit. This happens both with cygwin-1.7.9 and the latest snapshot. Here are a few comments: 1. The problem disappears if I don't send bash's stderr to the pipe. 2. The problem also disappears if I replace -ic by -c in the call to bash, presumably because there's nothing sent to stderr in that case. 3. The problem disappears if I don't use a pipe but just have the bash subprocess write to the terminal, even if I redirect bash's stderr to stdout. Ken* Does your program work when compiled by gcc-4 (as opposed to gcc-3) ? -- Because I also spot some problem with it, if gcc-3 is used: # correct with gcc-4 $ gcc-4 STC.c&& ./a.exe ls: cannot access neeeee: No such file or directory .bashrc* # custom cygwin1.dll warning with gcc-3 : $ gcc-3 STC.c&& ./a.exe ##### Ooops, first in forkee and it is not dll:init; where=dcrt0.cc dll_crt0_1() pozde - je po linked dll::init iwhere=90 ls: cannot access neeeee: No such file or directory .bashrc* I think I've have never seen the message (its my debug message); if you confirm your program makes difference between gcc-3 and gcc-4, I will have find out what it means. (Probably it is like unexpected ordering of DLL's or ordering of their initialization.)
I always use gcc-4. I've just recompiled with gcc-3, and the results are the same.
Ken -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
