From 748a2177dcf8ff72bca90f5c7d516559ddd67352 Mon Sep 17 00:00:00 2001 From: David Kalnischkies Date: Mon, 22 Dec 2014 23:14:08 +0100 Subject: pass-through stdin fd instead of content if not a terminal Commit 299aea924ccef428219ed6f1a026c122678429e6 fixes the problem of not logging terminal in case stdin & stdout are not a terminal. The problem is that we are then trying to pass-through stdin content by reading from the apt-process stdin and writing it to the stdin of the child (dpkg), which works great for users who can control themselves, but pipes and co are a bit less forgiving causing us to pass everything to the first child process, which if the sending part of the pipe is e.g. 'yes' we will never see the end of it (as the pipe is full at some point and further writing blocks). There is a simple solution for that of course: If stdin isn't a terminal, we us the apt-process stdin as stdin for the child directly (We don't do this if it is a terminal to be able to save the typed input in the log). Closes: 773061 --- apt-pkg/deb/dpkgpm.cc | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) (limited to 'apt-pkg/deb') diff --git a/apt-pkg/deb/dpkgpm.cc b/apt-pkg/deb/dpkgpm.cc index d54b7b50f..e23ca466d 100644 --- a/apt-pkg/deb/dpkgpm.cc +++ b/apt-pkg/deb/dpkgpm.cc @@ -73,7 +73,8 @@ public: pkgDPkgPMPrivate() : stdin_is_dev_null(false), dpkgbuf_pos(0), term_out(NULL), history_out(NULL), progress(NULL), tt_is_valid(false), master(-1), - slave(NULL), protect_slave_from_dying(-1) + slave(NULL), protect_slave_from_dying(-1), + direct_stdin(false) { dpkgbuf[0] = '\0'; } @@ -100,6 +101,7 @@ public: sigset_t sigmask; sigset_t original_sigmask; + bool direct_stdin; }; namespace @@ -1079,6 +1081,9 @@ void pkgDPkgPM::StartPtyMagic() return; } + if (isatty(STDIN_FILENO) == 0) + d->direct_stdin = true; + _error->PushToStack(); d->master = posix_openpt(O_RDWR | O_NOCTTY); @@ -1176,7 +1181,10 @@ void pkgDPkgPM::SetupSlavePtyMagic() _error->FatalE("ioctl", "Setting TIOCSCTTY for slave fd %d failed!", slaveFd); else { - for (unsigned short i = 0; i < 3; ++i) + unsigned short i = 0; + if (d->direct_stdin == true) + ++i; + for (; i < 3; ++i) if (dup2(slaveFd, i) == -1) _error->FatalE("dup2", "Dupping %d to %d in child failed!", slaveFd, i); @@ -1596,8 +1604,8 @@ bool pkgDPkgPM::GoNoABIBreak(APT::Progress::PackageManager *progress) // wait for input or output here FD_ZERO(&rfds); - if (d->master >= 0 && !d->stdin_is_dev_null) - FD_SET(0, &rfds); + if (d->master >= 0 && d->direct_stdin == false && d->stdin_is_dev_null == false) + FD_SET(STDIN_FILENO, &rfds); FD_SET(_dpkgin, &rfds); if(d->master >= 0) FD_SET(d->master, &rfds); -- cgit v1.2.3