int __c_select(int arg1, ...)
{
asm("clre");
va_list ap;
int res,choice;
int use_default = 0;
va_start(ap, arg1);
for (res = arg1,choice=0; res != SELECT_END; res = va_arg(ap, int),choice++) {
switch (res)
{
case SELECT_DEFAULT:
use_default = 1;
break;
case SELECT_OVER_ARRAY: {
int *arr = va_arg(ap, int *);
int n = va_arg(ap, int);
for (int i=0;i<n;i++)
setup_resource(arr[i],choice,i);
break;
}
#if 0
case SELECT_WHEN_PINSEQ:
res = va_arg(ap, int);
port_set_condition(res, XS1_PORT_PINSEQ);
setup_resource(res,choice,0);
break;
case SELECT_WHEN_PINSEQ:
res = va_arg(ap, int);
port_set_condition(res, XS1_PORT_PINSEQ);
setup_resource(res,choice,0);
break;
#endif
default:
setup_resource(res,choice,0);
break;
}
}
va_end(ap);
return __c_wait();
}
static void
setup_child()
{
/* io需要在降权之前设置，因为需要打开一个输出文件 */
setup_io();
/* 关闭所有继承的附加组id， 设置有gid，uid */
if (setgroups(0, NULL) != 0 ||
setresgid(pwd->pw_gid, pwd->pw_gid, pwd->pw_gid) != 0 ||
setresuid(pwd->pw_uid, pwd->pw_uid, pwd->pw_uid) != 0)
exit(0);
chdir(workdir);
/*
g_slist_foreach(resource_rule, foreach_resource, NULL);
g_slist_foreach(environ_rule, foreach_environ, &env);
*/
setup_resource();
ptrace(PTRACE_TRACEME, 0, NULL, NULL);
execvpe(command[0], command, (char * const *)g_get_environ());
exit(1);
}
