int main(int argc, char **argv) {
GError *error = NULL;
GOptionContext *context = NULL;
uid_t orig_uid = -1;
gid_t orig_gid = -1;
EscalateHelper *helper = NULL;
int exit_code = 2;
clearenv();
umask(0077);
context = g_option_context_new("- helper for pam_escalate.so");
if (!g_option_context_parse(context, &argc, &argv, &error)) {
goto done;
}
if (argc > 1) {
g_set_error(&error, ESCALATE_HELPER_ERROR, ESCALATE_HELPER_ERROR_EXTRA_ARGS,
"Non-flag arguments are not accepted");
goto done;
}
orig_uid = getuid();
orig_gid = getgid();
if (orig_uid != geteuid()) {
if (setuid(geteuid())) {
g_error("setuid() failed: %s", g_strerror(errno));
}
}
if (orig_gid != getegid()) {
if (setgid(getegid())) {
g_error("setgid() failed: %s", g_strerror(errno));
}
}
helper = EscalateHelperNew(STDIN_FILENO, STDOUT_FILENO, orig_uid, orig_gid);
if (!EscalateHelperHandleStart(helper, &error)) {
goto done;
}
if (EscalateHelperDoAction(helper, &error)) {
exit_code = 0;
} else {
exit_code = 1;
}
done:
if (error) {
g_printerr("Caught error: %s\n", error->message);
g_error_free(error);
}
EscalateHelperFree(helper);
return exit_code;
}
static void CreateHelper(EscalateHelper **helper, GIOChannel **stdin_writer,
GIOChannel **stdout_reader) {
int stdin_fds [2];
int stdout_fds [2];
g_assert(g_unix_open_pipe(stdin_fds, 0, NULL));
g_assert(g_unix_open_pipe(stdout_fds, 0, NULL));
*helper = EscalateHelperNew(stdin_fds[0], stdout_fds[1]);
*stdin_writer = g_io_channel_unix_new(stdin_fds[1]);
*stdout_reader = g_io_channel_unix_new(stdout_fds[0]);
g_assert(*helper);
}
