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Don't try to restore the terminal if we are not the foreground

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process.  Otherwise, we may be stopped by SIGTTOU when we try to
update the terminal settings when cleaning up.
This commit is contained in:
Todd C. Miller
2012-04-05 12:40:51 -04:00
parent 6f4afc6652
commit c0a75ce9d9
1 changed files with 13 additions and 7 deletions
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20
src/exec_pty.c
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@@ -113,8 +113,11 @@ cleanup(int gotsignal)
{
debug_decl(cleanup, SUDO_DEBUG_EXEC);
if (!tq_empty(&io_plugins))
term_restore(io_fds[SFD_USERTTY], 0);
if (!tq_empty(&io_plugins) && io_fds[SFD_USERTTY] != -1) {
check_foreground();
if (foreground) {
term_restore(io_fds[SFD_USERTTY], 0);
}
#ifdef HAVE_SELINUX
selinux_restore_tty();
#endif
@@ -680,9 +683,12 @@ pty_close(struct command_status *cstat)
flush_output();
if (io_fds[SFD_USERTTY] != -1) {
do {
n = term_restore(io_fds[SFD_USERTTY], 0);
} while (!n && errno == EINTR);
check_foreground();
if (foreground) {
do {
n = term_restore(io_fds[SFD_USERTTY], 0);
} while (!n && errno == EINTR);
}
}
/* If child was signalled, write the reason to stdout like the shell. */
@@ -1004,7 +1010,7 @@ exec_monitor(struct command_details *details, int backchannel)
goto done;
if (errno == EINTR)
continue;
error(1, _("select failed"));
error(1, "monitor: %s", _("select failed"));
}
if (FD_ISSET(signal_pipe[0], fdsr)) {
@@ -1256,7 +1262,7 @@ safe_close(int fd)
/* Avoid closing /dev/tty or std{in,out,err}. */
if (fd < 3 || fd == io_fds[SFD_USERTTY]) {
errno = EINVAL;
return -1;
debug_return_int(-1);
}
debug_return_int(close(fd));
}