is no associated reader just return as there is nothing else to be
done. In practice is it not possible for SUDO_EV_READ to be set
if revent is NULL but an early return is harmless and possibly
easier to understand. Coverity CID 104124.
the signal is in a different container since the PID namespaces in
different conatiners are separate. Avoid looking up the process
group by id when si_pid is 0 since getpgid(0) returns the process
group of the current process. Since sudo ignores signals sent
by processes in its own process group, this had the effect of
ignoring signals sent from other containers. From Maarten de Vries
SUDO_EV_READ and SUDO_EV_WRITE are set and read() returns 0 (EOF)
we don't close the fd before the write() is performed.
If the write() returns EPIPE, ENXIO, EIO or EBADF, clear SUDO_EV_READ
before we close the fd to avoid calling read() on a closed fd.
the command. Fixes a problem where pam_gnome_keyring installs its
own SIGCHLD handler and may not restore the original one. As a
result, we now have to explicitly wait for the askpass helper to
finish. Bug #657
sudo front-end will now set the default debug instance appropriately
before calling into the plugin. This means the plugin no longer needs
to do the sudo_debug_set_default_instance() dance.
For -1 (error) return, we now kill the command and disable
the I/O logging function that returned the error.
For a 0 (reject) return, we no longer display the rejected
output to the user's terminal. The plugin API revision is now 1.6.
foregroup process group. Instead of calling tcgetpgrp(), which is
racy, we set a temporary handler for SIGTTOU and check whether it
was received after a failed call to tcsetattr().
then calls gettext().
Add U_ macro that calls warning_gettext() instead of gettext().
Rename warning2()/error2() back to warning_nodebug()/error_nodebug().
is currently O(n). The only consumer of timed events is sudoreplay
which only used a singled one so O(n) == O(1) for now. This also
allows us to remove the nanosleep compat function as we now use a
timeout event instead.
safe_close(). A new ev_free_by_fd() function is used to remove and
free any events sharing the specified fd. This can be used after
safe_close() to make sure we don't try to select() on a closed fd.
queue functions. This includes a private queue.h header derived
from FreeBSD. It is simpler to just use our own header rather than
try to deal with macros that may or may not be present in various
queue.h incarnations.
simplied subset of libevent2. Currently only fd events are supported
(since that's all we need). The poll() backend is used by default,
except on Mac OS X where poll() is broken for devices (including
/dev/tty and ptys).
