int
main(int argc, char *argv[])
{
set_process_name("ivpn-client");
parse_options(argc, argv);
if (geteuid() != 0) {
lerr("Effective UID is %u. It need to be 0.", geteuid());
return EXIT_FAILURE;
}
if (install_sigchld_handler() == 0)
return EXIT_FAILURE;
if (username == 0) {
username = get_current_user();
if (username == 0)
exit(EXIT_FAILURE);
}
if (!sslutil_init(CA_CERT_FILE, 0, 0))
return EXIT_SSL_ERROR;
return run_client();
}
ChildProcessManager() { install_sigchld_handler(); }
static int sigchld_pipe_fd = -1;
static void got_signal(int sig) {
int saved_errno = errno;
int ignored_result;
/* write() errors are unhandled. If the buffer is full, we don't
* care. What about other errors? */
ignored_result = write(sigchld_pipe_fd, "x", 1);
errno = saved_errno;
}
PyDoc_STRVAR(install_sigchld_handler_doc, "\
install_sigchld_handler(fd)\n\
\n\
Installs a SIGCHLD handler which will write a byte to the given fd\n\
whenever a SIGCHLD occurs. This is done in C code because the python\n\
signal handling system is not reliable, and additionally cannot\n\
specify SA_RESTART.\n\
\n\
Please ensure fd is in non-blocking mode.\n\
");
static PyObject *
install_sigchld_handler(PyObject *self, PyObject *args) {
int fd, old_fd;
struct sigaction sa;
if (!PyArg_ParseTuple(args, "i:install_sigchld_handler", &fd)) {
