summaryrefslogtreecommitdiff
path: root/apt-pkg/deb/dpkgpm.cc
diff options
context:
space:
mode:
Diffstat (limited to 'apt-pkg/deb/dpkgpm.cc')
-rw-r--r--apt-pkg/deb/dpkgpm.cc99
1 files changed, 55 insertions, 44 deletions
diff --git a/apt-pkg/deb/dpkgpm.cc b/apt-pkg/deb/dpkgpm.cc
index dd03eac2c..593875071 100644
--- a/apt-pkg/deb/dpkgpm.cc
+++ b/apt-pkg/deb/dpkgpm.cc
@@ -72,7 +72,8 @@ class pkgDPkgPMPrivate
public:
pkgDPkgPMPrivate() : stdin_is_dev_null(false), dpkgbuf_pos(0),
term_out(NULL), history_out(NULL),
- progress(NULL), master(-1), slave(NULL)
+ progress(NULL), tt_is_valid(false), master(-1),
+ slave(NULL), protect_slave_from_dying(-1)
{
dpkgbuf[0] = '\0';
}
@@ -90,8 +91,10 @@ public:
// pty stuff
struct termios tt;
+ bool tt_is_valid;
int master;
char * slave;
+ int protect_slave_from_dying;
// signals
sigset_t sigmask;
@@ -1069,47 +1072,40 @@ void pkgDPkgPM::StartPtyMagic()
}
_error->PushToStack();
- // if tcgetattr for both stdin/stdout returns 0 (no error)
- // we do the pty magic
- if (tcgetattr(STDOUT_FILENO, &d->tt) == 0 &&
- tcgetattr(STDIN_FILENO, &d->tt) == 0)
+
+ d->master = posix_openpt(O_RDWR | O_NOCTTY);
+ if (d->master == -1)
+ _error->Errno("posix_openpt", _("Can not write log (%s)"), _("Is /dev/pts mounted?"));
+ else if (unlockpt(d->master) == -1)
+ _error->Errno("unlockpt", "Unlocking the slave of master fd %d failed!", d->master);
+ else
{
- d->master = posix_openpt(O_RDWR | O_NOCTTY);
- if (d->master == -1)
- _error->Errno("posix_openpt", _("Can not write log (%s)"), _("Is /dev/pts mounted?"));
- else if (unlockpt(d->master) == -1)
- {
- _error->Errno("unlockpt", "Unlocking the slave of master fd %d failed!", d->master);
- close(d->master);
- d->master = -1;
- }
+ char const * const slave_name = ptsname(d->master);
+ if (slave_name == NULL)
+ _error->Errno("ptsname", "Getting name for slave of master fd %d failed!", d->master);
else
{
- char const * const slave_name = ptsname(d->master);
- if (slave_name == NULL)
+ d->slave = strdup(slave_name);
+ if (d->slave == NULL)
+ _error->Errno("strdup", "Copying name %s for slave of master fd %d failed!", slave_name, d->master);
+ else if (grantpt(d->master) == -1)
+ _error->Errno("grantpt", "Granting access to slave %s based on master fd %d failed!", slave_name, d->master);
+ else if (tcgetattr(STDIN_FILENO, &d->tt) == 0)
{
- _error->Errno("unlockpt", "Getting name for slave of master fd %d failed!", d->master);
- close(d->master);
- d->master = -1;
- }
- else
- {
- d->slave = strdup(slave_name);
- if (d->slave == NULL)
+ d->tt_is_valid = true;
+ struct termios raw_tt;
+ // copy window size of stdout if its a 'good' terminal
+ if (tcgetattr(STDOUT_FILENO, &raw_tt) == 0)
{
- _error->Errno("strdup", "Copying name %s for slave of master fd %d failed!", slave_name, d->master);
- close(d->master);
- d->master = -1;
+ struct winsize win;
+ if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) < 0)
+ _error->Errno("ioctl", "Getting TIOCGWINSZ from stdout failed!");
+ if (ioctl(d->master, TIOCSWINSZ, &win) < 0)
+ _error->Errno("ioctl", "Setting TIOCSWINSZ for master fd %d failed!", d->master);
}
- struct winsize win;
- if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) < 0)
- _error->Errno("ioctl", "Getting TIOCGWINSZ from stdout failed!");
- if (ioctl(d->master, TIOCSWINSZ, &win) < 0)
- _error->Errno("ioctl", "Setting TIOCSWINSZ for master fd %d failed!", d->master);
if (tcsetattr(d->master, TCSANOW, &d->tt) == -1)
_error->Errno("tcsetattr", "Setting in Start via TCSANOW for master fd %d failed!", d->master);
- struct termios raw_tt;
raw_tt = d->tt;
cfmakeraw(&raw_tt);
raw_tt.c_lflag &= ~ECHO;
@@ -1121,18 +1117,22 @@ void pkgDPkgPM::StartPtyMagic()
sigaddset(&d->sigmask, SIGTTOU);
sigprocmask(SIG_BLOCK,&d->sigmask, &d->original_sigmask);
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &raw_tt) == -1)
- _error->Errno("tcsetattr", "Setting in Start via TCSAFLUSH for stdout failed!");
+ _error->Errno("tcsetattr", "Setting in Start via TCSAFLUSH for stdin failed!");
sigprocmask(SIG_SETMASK, &d->original_sigmask, NULL);
+
+ }
+ if (d->slave != NULL)
+ {
+ /* on linux, closing (and later reopening) all references to the slave
+ makes the slave a death end, so we open it here to have one open all
+ the time. We could use this fd in SetupSlavePtyMagic() for linux, but
+ on kfreebsd we get an incorrect ("step like") output then while it has
+ no problem with closing all references… so to avoid platform specific
+ code here we combine both and be happy once more */
+ d->protect_slave_from_dying = open(d->slave, O_RDWR | O_CLOEXEC);
}
}
}
- else
- {
- // complain only if stdout is either a terminal (but still failed) or is an invalid
- // descriptor otherwise we would complain about redirection to e.g. /dev/null as well.
- if (isatty(STDOUT_FILENO) == 1 || errno == EBADF)
- _error->Errno("tcgetattr", _("Can not write log (%s)"), _("Is stdout a terminal?"));
- }
if (_error->PendingError() == true)
{
@@ -1141,17 +1141,23 @@ void pkgDPkgPM::StartPtyMagic()
close(d->master);
d->master = -1;
}
+ if (d->slave != NULL)
+ {
+ free(d->slave);
+ d->slave = NULL;
+ }
_error->DumpErrors(std::cerr);
}
_error->RevertToStack();
}
void pkgDPkgPM::SetupSlavePtyMagic()
{
- if(d->master == -1)
+ if(d->master == -1 || d->slave == NULL)
return;
if (close(d->master) == -1)
_error->FatalE("close", "Closing master %d in child failed!", d->master);
+ d->master = -1;
if (setsid() == -1)
_error->FatalE("setsid", "Starting a new session for child failed!");
@@ -1166,7 +1172,7 @@ void pkgDPkgPM::SetupSlavePtyMagic()
if (dup2(slaveFd, i) == -1)
_error->FatalE("dup2", "Dupping %d to %d in child failed!", slaveFd, i);
- if (tcsetattr(0, TCSANOW, &d->tt) < 0)
+ if (d->tt_is_valid == true && tcsetattr(STDIN_FILENO, TCSANOW, &d->tt) < 0)
_error->FatalE("tcsetattr", "Setting in Setup via TCSANOW for slave fd %d failed!", slaveFd);
}
@@ -1178,9 +1184,14 @@ void pkgDPkgPM::StopPtyMagic()
if (d->slave != NULL)
free(d->slave);
d->slave = NULL;
+ if (d->protect_slave_from_dying != -1)
+ {
+ close(d->protect_slave_from_dying);
+ d->protect_slave_from_dying = -1;
+ }
if(d->master >= 0)
{
- if (tcsetattr(0, TCSAFLUSH, &d->tt) == -1)
+ if (d->tt_is_valid == true && tcsetattr(STDIN_FILENO, TCSAFLUSH, &d->tt) == -1)
_error->FatalE("tcsetattr", "Setting in Stop via TCSAFLUSH for stdin failed!");
close(d->master);
d->master = -1;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-02 18:37:02 +0000