diff options
| -rw-r--r-- | pkg/rootless/rootless_linux.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/pkg/rootless/rootless_linux.c b/pkg/rootless/rootless_linux.c index 098ca7830..b08a27fec 100644 --- a/pkg/rootless/rootless_linux.c +++ b/pkg/rootless/rootless_linux.c @@ -69,6 +69,19 @@ rootless_gid () static void do_pause () { + int i; + struct sigaction act; + int const sig[] = + { + SIGALRM, SIGHUP, SIGINT, SIGPIPE, SIGQUIT, SIGTERM, SIGPOLL, + SIGPROF, SIGVTALRM, SIGXCPU, SIGXFSZ, 0 + }; + + act.sa_handler = SIG_IGN; + + for (i = 0; sig[i]; i++) + sigaction (sig[i], &act, NULL); + prctl (PR_SET_NAME, "podman pause", NULL, NULL, NULL); while (1) pause (); @@ -574,6 +587,7 @@ reexec_in_user_namespace (int ready, char *pause_pid_file_path) char *listen_pid = NULL; bool do_socket_activation = false; char *cwd = getcwd (NULL, 0); + sigset_t sigset, oldsigset; if (cwd == NULL) { @@ -621,6 +635,22 @@ reexec_in_user_namespace (int ready, char *pause_pid_file_path) return pid; } + if (sigfillset (&sigset) < 0) + { + fprintf (stderr, "cannot fill sigset: %s\n", strerror (errno)); + _exit (EXIT_FAILURE); + } + if (sigdelset (&sigset, SIGCHLD) < 0) + { + fprintf (stderr, "cannot sigdelset(SIGCHLD): %s\n", strerror (errno)); + _exit (EXIT_FAILURE); + } + if (sigprocmask (SIG_BLOCK, &sigset, &oldsigset) < 0) + { + fprintf (stderr, "cannot block signals: %s\n", strerror (errno)); + _exit (EXIT_FAILURE); + } + argv = get_cmd_line_args (ppid); if (argv == NULL) { @@ -685,6 +715,12 @@ reexec_in_user_namespace (int ready, char *pause_pid_file_path) while (ret < 0 && errno == EINTR); close (ready); + if (sigprocmask (SIG_SETMASK, &oldsigset, NULL) < 0) + { + fprintf (stderr, "cannot block signals: %s\n", strerror (errno)); + _exit (EXIT_FAILURE); + } + execvp (argv[0], argv); _exit (EXIT_FAILURE); |