HelenOS sources
system_open 182 uspace/app/shutdown/shutdown.c rc = system_open(SYSTEM_DEFAULT, &sd_system_cb, &shutdown, &system);
system_open 43 uspace/lib/system/include/system.h extern errno_t system_open(const char *, system_cb_t *, void *, system_t **);
system_open 95 uspace/lib/system/test/system.c rc = system_open(test_system_svc, NULL, NULL, &system);
system_open 123 uspace/lib/system/test/system.c rc = system_open(test_system_svc, NULL, NULL, &system);
system_open 158 uspace/lib/system/test/system.c rc = system_open(test_system_svc, NULL, NULL, &system);
system_open 195 uspace/lib/system/test/system.c rc = system_open(test_system_svc, &test_system_cb, &resp, &system);
system_open 239 uspace/lib/system/test/system.c rc = system_open(test_system_svc, &test_system_cb, &resp, &system);
HelenOS homepage, sources at GitHub