On Fri, Jan 30, 2004 at 03:08:09PM -0500, Thomas Dickey wrote: > On Fri, 30 Jan 2004, Branden Robinson wrote: > > On Thu, Jan 29, 2004 at 08:58:25PM -0500, Thomas Dickey wrote: > > > On Wed, Jan 28, 2004 at 11:37:39PM -0500, Branden Robinson wrote: > > > They seem to give some hints. Your trace shows the process-ids, no timestamps > > > and Don's doesn't show process-ids. But stripping away that column, I can see > > > that his process is (I'm guessing) running on a network connection while yours > > > is local machine (that's guessing by looking at some of the calls they make). > > > His is getting occasional EAGAIN errno's reading from the pty (perhaps because > > > it's slower). I don't see any detail from the subprocess on his - perhaps it > > > doesn't use the -f option of strace. Anyway, it seems that the failure is > > > on the child process, since I don't see a call on the parent side that fails. > > > > Don was running across a network connection, but he said he experienced > > the exact same problem locally. > > So it's not that (network delay). But a little more information might > help. From the original report, I think this chunk in main.c is where > it's failing - but no idea why (around line 3415): > > #ifndef USE_POSIX_TERMIOS > if (ioctl(tty, TCSETA, &tio) == -1) > HsSysError(cp_pipe[1], ERROR_TIOCSETP); > #else /* USE_POSIX_TERMIOS */ > if (tcsetattr(tty, TCSANOW, &tio) == -1) > HsSysError(cp_pipe[1], ERROR_TIOCSETP); > #endif /* USE_POSIX_TERMIOS */ > > Since the '23' would be ERROR_TIOCSETP. There're several calls before > that in the child process, and I can only guess what's going on. (This > one looks hard enough even if I could reproduce it). I generally do > something like > strace -tfo foo.out ./xterm > for this sort of thing... Don, are you up to trying the above over a local X connection? -- G. Branden Robinson | No executive devotes much effort to Debian GNU/Linux | proving himself wrong. branden@debian.org | -- Laurence J. Peter http://people.debian.org/~branden/ |
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