static const char *const __rcs_file_version__ = "$Revision: 23459 $";
#include "config.h"
#include "launchd_runtime.h"
#include <mach/mach.h>
#include <mach/mach_error.h>
#include <mach/boolean.h>
#include <mach/message.h>
#include <mach/notify.h>
#include <mach/mig_errors.h>
#include <mach/mach_traps.h>
#include <mach/mach_interface.h>
#include <mach/host_info.h>
#include <mach/mach_host.h>
#include <mach/exception.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/proc.h>
#include <sys/event.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <sys/mount.h>
#include <sys/reboot.h>
#include <sys/fcntl.h>
#include <bsm/libbsm.h>
#include <malloc/malloc.h>
#include <unistd.h>
#include <pthread.h>
#include <errno.h>
#include <string.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <syslog.h>
#include <signal.h>
#include <dlfcn.h>
#include "launchd_internalServer.h"
#include "launchd_internal.h"
#include "notifyServer.h"
#include "mach_excServer.h"
#include "launch.h"
#include "launchd.h"
#include "launchd_core_logic.h"
#include "libvproc_internal.h"
#include "job_reply.h"
static mach_port_t ipc_port_set;
static mach_port_t demand_port_set;
static mach_port_t launchd_internal_port;
static int mainkq;
#define BULK_KEV_MAX 100
static struct kevent *bulk_kev;
static int bulk_kev_i;
static int bulk_kev_cnt;
static pthread_t kqueue_demand_thread;
static pthread_t demand_thread;
static void *mport_demand_loop(void *arg);
static void *kqueue_demand_loop(void *arg);
static void log_kevent_struct(int level, struct kevent *kev, int indx);
static boolean_t launchd_internal_demux(mach_msg_header_t *Request, mach_msg_header_t *Reply);
static void record_caller_creds(mach_msg_header_t *mh);
static void launchd_runtime2(mach_msg_size_t msg_size, mig_reply_error_t *bufRequest, mig_reply_error_t *bufReply);
static mach_msg_size_t max_msg_size;
static mig_callback *mig_cb_table;
static size_t mig_cb_table_sz;
static timeout_callback runtime_idle_callback;
static mach_msg_timeout_t runtime_idle_timeout;
static audit_token_t *au_tok;
static size_t runtime_busy_cnt;
static STAILQ_HEAD(, logmsg_s) logmsg_queue = STAILQ_HEAD_INITIALIZER(logmsg_queue);
static size_t logmsg_queue_sz;
static size_t logmsg_queue_cnt;
static mach_port_t drain_reply_port;
static void runtime_log_uncork_pending_drain(void);
static kern_return_t runtime_log_pack(vm_offset_t *outval, mach_msg_type_number_t *outvalCnt);
static void runtime_log_push(void);
static bool logmsg_add(struct runtime_syslog_attr *attr, int err_num, const char *msg);
static void logmsg_remove(struct logmsg_s *lm);
static const int sigigns[] = { SIGHUP, SIGINT, SIGPIPE, SIGALRM, SIGTERM,
SIGURG, SIGTSTP, SIGTSTP, SIGCONT, SIGTTIN, SIGTTOU, SIGIO, SIGXCPU,
SIGXFSZ, SIGVTALRM, SIGPROF, SIGWINCH, SIGINFO, SIGUSR1, SIGUSR2
};
static sigset_t sigign_set;
mach_port_t
runtime_get_kernel_port(void)
{
return launchd_internal_port;
}
void
launchd_runtime_init(void)
{
mach_msg_size_t mxmsgsz;
pthread_attr_t attr;
launchd_assert((mainkq = kqueue()) != -1);
launchd_assert((errno = mach_port_allocate(mach_task_self(), MACH_PORT_RIGHT_PORT_SET, &demand_port_set)) == KERN_SUCCESS);
launchd_assert((errno = mach_port_allocate(mach_task_self(), MACH_PORT_RIGHT_PORT_SET, &ipc_port_set)) == KERN_SUCCESS);
launchd_assert(launchd_mport_create_recv(&launchd_internal_port) == KERN_SUCCESS);
launchd_assert(launchd_mport_make_send(launchd_internal_port) == KERN_SUCCESS);
mxmsgsz = sizeof(union __RequestUnion__x_launchd_internal_subsystem);
if (x_launchd_internal_subsystem.maxsize > mxmsgsz) {
mxmsgsz = x_launchd_internal_subsystem.maxsize;
}
launchd_assert(runtime_add_mport(launchd_internal_port, launchd_internal_demux, mxmsgsz) == KERN_SUCCESS);
pthread_attr_init(&attr);
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN);
launchd_assert(pthread_create(&kqueue_demand_thread, &attr, kqueue_demand_loop, NULL) == 0);
pthread_attr_destroy(&attr);
pthread_attr_init(&attr);
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN);
launchd_assert(pthread_create(&demand_thread, &attr, mport_demand_loop, NULL) == 0);
pthread_attr_destroy(&attr);
}
void
launchd_runtime_init2(void)
{
size_t i;
for (i = 0; i < (sizeof(sigigns) / sizeof(int)); i++) {
sigaddset(&sigign_set, sigigns[i]);
launchd_assumes(signal(sigigns[i], SIG_IGN) != SIG_ERR);
}
}
void *
mport_demand_loop(void *arg __attribute__((unused)))
{
mach_msg_empty_rcv_t dummy;
kern_return_t kr;
for (;;) {
kr = mach_msg(&dummy.header, MACH_RCV_MSG|MACH_RCV_LARGE, 0, 0, demand_port_set, 0, MACH_PORT_NULL);
if (kr == MACH_RCV_PORT_CHANGED) {
break;
} else if (!launchd_assumes(kr == MACH_RCV_TOO_LARGE)) {
continue;
}
launchd_assumes(handle_mport(launchd_internal_port) == 0);
}
return NULL;
}
const char *
proc_flags_to_C_names(unsigned int flags)
{
#define MAX_PFLAG_STR "P_ADVLOCK|P_CONTROLT|P_LP64|P_NOCLDSTOP|P_PPWAIT|P_PROFIL|P_SELECT|P_CONTINUED|P_SUGID|P_SYSTEM|P_TIMEOUT|P_TRACED|P_RESV3|P_WEXIT|P_EXEC|P_OWEUPC|P_AFFINITY|P_TRANSLATED|P_RESV5|P_CHECKOPENEVT|P_DEPENDENCY_CAPABLE|P_REBOOT|P_TBE|P_RESV7|P_THCWD|P_RESV9|P_RESV10|P_RESV11|P_NOSHLIB|P_FORCEQUOTA|P_NOCLDWAIT|P_NOREMOTEHANG|0xdeadbeeffeedface"
static char flags_buf[sizeof(MAX_PFLAG_STR)];
char *flags_off = NULL;
if (!flags) {
return "";
}
while (flags) {
if (flags_off) {
*flags_off = '|';
flags_off++;
*flags_off = '\0';
} else {
flags_off = flags_buf;
}
#define FLAGIF(f) if (flags & f) { flags_off += sprintf(flags_off, #f); flags &= ~f; }
FLAGIF(P_ADVLOCK)
else FLAGIF(P_CONTROLT)
else FLAGIF(P_LP64)
else FLAGIF(P_NOCLDSTOP)
else FLAGIF(P_PPWAIT)
else FLAGIF(P_PROFIL)
else FLAGIF(P_SELECT)
else FLAGIF(P_CONTINUED)
else FLAGIF(P_SUGID)
else FLAGIF(P_SYSTEM)
else FLAGIF(P_TIMEOUT)
else FLAGIF(P_TRACED)
else FLAGIF(P_RESV3)
else FLAGIF(P_WEXIT)
else FLAGIF(P_EXEC)
else FLAGIF(P_OWEUPC)
else FLAGIF(P_AFFINITY)
else FLAGIF(P_TRANSLATED)
else FLAGIF(P_RESV5)
else FLAGIF(P_CHECKOPENEVT)
else FLAGIF(P_DEPENDENCY_CAPABLE)
else FLAGIF(P_REBOOT)
else FLAGIF(P_TBE)
else FLAGIF(P_RESV7)
else FLAGIF(P_THCWD)
else FLAGIF(P_RESV9)
else FLAGIF(P_RESV10)
else FLAGIF(P_RESV11)
else FLAGIF(P_NOSHLIB)
else FLAGIF(P_FORCEQUOTA)
else FLAGIF(P_NOCLDWAIT)
else FLAGIF(P_NOREMOTEHANG)
else {
flags_off += sprintf(flags_off, "0x%x", flags);
flags = 0;
}
}
return flags_buf;
}
const char *
reboot_flags_to_C_names(unsigned int flags)
{
#define MAX_RB_STR "RB_ASKNAME|RB_SINGLE|RB_NOSYNC|RB_KDB|RB_HALT|RB_INITNAME|RB_DFLTROOT|RB_ALTBOOT|RB_UNIPROC|RB_SAFEBOOT|RB_UPSDELAY|0xdeadbeeffeedface"
static char flags_buf[sizeof(MAX_RB_STR)];
char *flags_off = NULL;
if (flags == 0) {
return "RB_AUTOBOOT";
}
while (flags) {
if (flags_off) {
*flags_off = '|';
flags_off++;
*flags_off = '\0';
} else {
flags_off = flags_buf;
}
FLAGIF(RB_ASKNAME)
else FLAGIF(RB_SINGLE)
else FLAGIF(RB_NOSYNC)
else FLAGIF(RB_KDB)
else FLAGIF(RB_HALT)
else FLAGIF(RB_INITNAME)
else FLAGIF(RB_DFLTROOT)
else FLAGIF(RB_ALTBOOT)
else FLAGIF(RB_UNIPROC)
else FLAGIF(RB_SAFEBOOT)
else FLAGIF(RB_UPSDELAY)
else {
flags_off += sprintf(flags_off, "0x%x", flags);
flags = 0;
}
}
return flags_buf;
}
const char *
signal_to_C_name(unsigned int sig)
{
static char unknown[25];
#define SIG2CASE(sg) case sg: return #sg
switch (sig) {
SIG2CASE(SIGHUP);
SIG2CASE(SIGINT);
SIG2CASE(SIGQUIT);
SIG2CASE(SIGILL);
SIG2CASE(SIGTRAP);
SIG2CASE(SIGABRT);
SIG2CASE(SIGFPE);
SIG2CASE(SIGKILL);
SIG2CASE(SIGBUS);
SIG2CASE(SIGSEGV);
SIG2CASE(SIGSYS);
SIG2CASE(SIGPIPE);
SIG2CASE(SIGALRM);
SIG2CASE(SIGTERM);
SIG2CASE(SIGURG);
SIG2CASE(SIGSTOP);
SIG2CASE(SIGTSTP);
SIG2CASE(SIGCONT);
SIG2CASE(SIGCHLD);
SIG2CASE(SIGTTIN);
SIG2CASE(SIGTTOU);
SIG2CASE(SIGIO);
SIG2CASE(SIGXCPU);
SIG2CASE(SIGXFSZ);
SIG2CASE(SIGVTALRM);
SIG2CASE(SIGPROF);
SIG2CASE(SIGWINCH);
SIG2CASE(SIGINFO);
SIG2CASE(SIGUSR1);
SIG2CASE(SIGUSR2);
default:
snprintf(unknown, sizeof(unknown), "%u", sig);
return unknown;
}
}
void
log_kevent_struct(int level, struct kevent *kev, int indx)
{
const char *filter_str;
char ident_buf[100];
char filter_buf[100];
char fflags_buf[1000];
char flags_buf[1000] = "0x0";
char *flags_off = NULL;
char *fflags_off = NULL;
unsigned short flags = kev->flags;
unsigned int fflags = kev->fflags;
if (flags) while (flags) {
if (flags_off) {
*flags_off = '|';
flags_off++;
*flags_off = '\0';
} else {
flags_off = flags_buf;
}
FLAGIF(EV_ADD)
else FLAGIF(EV_RECEIPT)
else FLAGIF(EV_DELETE)
else FLAGIF(EV_ENABLE)
else FLAGIF(EV_DISABLE)
else FLAGIF(EV_CLEAR)
else FLAGIF(EV_EOF)
else FLAGIF(EV_ONESHOT)
else FLAGIF(EV_ERROR)
else {
flags_off += sprintf(flags_off, "0x%x", flags);
flags = 0;
}
}
snprintf(ident_buf, sizeof(ident_buf), "%ld", kev->ident);
snprintf(fflags_buf, sizeof(fflags_buf), "0x%x", fflags);
switch (kev->filter) {
case EVFILT_READ:
filter_str = "EVFILT_READ";
break;
case EVFILT_WRITE:
filter_str = "EVFILT_WRITE";
break;
case EVFILT_AIO:
filter_str = "EVFILT_AIO";
break;
case EVFILT_VNODE:
filter_str = "EVFILT_VNODE";
if (fflags) while (fflags) {
if (fflags_off) {
*fflags_off = '|';
fflags_off++;
*fflags_off = '\0';
} else {
fflags_off = fflags_buf;
}
#define FFLAGIF(ff) if (fflags & ff) { fflags_off += sprintf(fflags_off, #ff); fflags &= ~ff; }
FFLAGIF(NOTE_DELETE)
else FFLAGIF(NOTE_WRITE)
else FFLAGIF(NOTE_EXTEND)
else FFLAGIF(NOTE_ATTRIB)
else FFLAGIF(NOTE_LINK)
else FFLAGIF(NOTE_RENAME)
else FFLAGIF(NOTE_REVOKE)
else {
fflags_off += sprintf(fflags_off, "0x%x", fflags);
fflags = 0;
}
}
break;
case EVFILT_PROC:
filter_str = "EVFILT_PROC";
if (fflags) while (fflags) {
if (fflags_off) {
*fflags_off = '|';
fflags_off++;
*fflags_off = '\0';
} else {
fflags_off = fflags_buf;
}
FFLAGIF(NOTE_EXIT)
else FFLAGIF(NOTE_REAP)
else FFLAGIF(NOTE_FORK)
else FFLAGIF(NOTE_EXEC)
else FFLAGIF(NOTE_SIGNAL)
else FFLAGIF(NOTE_TRACK)
else FFLAGIF(NOTE_TRACKERR)
else FFLAGIF(NOTE_CHILD)
else {
fflags_off += sprintf(fflags_off, "0x%x", fflags);
fflags = 0;
}
}
break;
case EVFILT_SIGNAL:
filter_str = "EVFILT_SIGNAL";
strcpy(ident_buf, signal_to_C_name(kev->ident));
break;
case EVFILT_TIMER:
filter_str = "EVFILT_TIMER";
snprintf(ident_buf, sizeof(ident_buf), "0x%lx", kev->ident);
if (fflags) while (fflags) {
if (fflags_off) {
*fflags_off = '|';
fflags_off++;
*fflags_off = '\0';
} else {
fflags_off = fflags_buf;
}
FFLAGIF(NOTE_SECONDS)
else FFLAGIF(NOTE_USECONDS)
else FFLAGIF(NOTE_NSECONDS)
else FFLAGIF(NOTE_ABSOLUTE)
else {
fflags_off += sprintf(fflags_off, "0x%x", fflags);
fflags = 0;
}
}
break;
case EVFILT_MACHPORT:
filter_str = "EVFILT_MACHPORT";
snprintf(ident_buf, sizeof(ident_buf), "0x%lx", kev->ident);
break;
case EVFILT_FS:
filter_str = "EVFILT_FS";
snprintf(ident_buf, sizeof(ident_buf), "0x%lx", kev->ident);
if (fflags) while (fflags) {
if (fflags_off) {
*fflags_off = '|';
fflags_off++;
*fflags_off = '\0';
} else {
fflags_off = fflags_buf;
}
FFLAGIF(VQ_NOTRESP)
else FFLAGIF(VQ_NEEDAUTH)
else FFLAGIF(VQ_LOWDISK)
else FFLAGIF(VQ_MOUNT)
else FFLAGIF(VQ_UNMOUNT)
else FFLAGIF(VQ_DEAD)
else FFLAGIF(VQ_ASSIST)
else FFLAGIF(VQ_NOTRESPLOCK)
else FFLAGIF(VQ_UPDATE)
else {
fflags_off += sprintf(fflags_off, "0x%x", fflags);
fflags = 0;
}
}
break;
default:
snprintf(filter_buf, sizeof(filter_buf), "%d", kev->filter);
filter_str = filter_buf;
break;
}
runtime_syslog(level, "KEVENT[%d]: udata = %p data = 0x%lx ident = %s filter = %s flags = %s fflags = %s",
indx, kev->udata, kev->data, ident_buf, filter_str, flags_buf, fflags_buf);
}
kern_return_t
x_handle_mport(mach_port_t junk __attribute__((unused)))
{
mach_port_name_array_t members;
mach_msg_type_number_t membersCnt;
mach_port_status_t status;
mach_msg_type_number_t statusCnt;
struct kevent kev;
unsigned int i;
if (!launchd_assumes((errno = mach_port_get_set_status(mach_task_self(), demand_port_set, &members, &membersCnt)) == KERN_SUCCESS)) {
return 1;
}
for (i = 0; i < membersCnt; i++) {
statusCnt = MACH_PORT_RECEIVE_STATUS_COUNT;
if (mach_port_get_attributes(mach_task_self(), members[i], MACH_PORT_RECEIVE_STATUS, (mach_port_info_t)&status,
&statusCnt) != KERN_SUCCESS) {
continue;
}
if (status.mps_msgcount) {
EV_SET(&kev, members[i], EVFILT_MACHPORT, 0, 0, 0, job_find_by_service_port(members[i]));
#if 0
if (launchd_assumes(kev.udata != NULL)) {
#endif
log_kevent_struct(LOG_DEBUG, &kev, 0);
(*((kq_callback *)kev.udata))(kev.udata, &kev);
#if 0
} else {
log_kevent_struct(LOG_ERR, &kev);
}
#endif
break;
}
}
launchd_assumes(vm_deallocate(mach_task_self(), (vm_address_t)members,
(vm_size_t) membersCnt * sizeof(mach_port_name_t)) == KERN_SUCCESS);
return 0;
}
void *
kqueue_demand_loop(void *arg __attribute__((unused)))
{
fd_set rfds;
for (;;) {
FD_ZERO(&rfds);
FD_SET(mainkq, &rfds);
if (launchd_assumes(select(mainkq + 1, &rfds, NULL, NULL, NULL) == 1)) {
launchd_assumes(handle_kqueue(launchd_internal_port, mainkq) == 0);
}
}
return NULL;
}
kern_return_t
x_handle_kqueue(mach_port_t junk __attribute__((unused)), integer_t fd)
{
struct timespec ts = { 0, 0 };
struct kevent kev[BULK_KEV_MAX];
int i;
bulk_kev = kev;
launchd_assumes((bulk_kev_cnt = kevent(fd, NULL, 0, kev, BULK_KEV_MAX, &ts)) != -1);
if (bulk_kev_cnt > 0) {
#if 0
Dl_info dli;
if (launchd_assumes(malloc_size(kev.udata) || dladdr(kev.udata, &dli))) {
#endif
for (i = 0; i < bulk_kev_cnt; i++) {
log_kevent_struct(LOG_DEBUG, &kev[i], i);
}
for (i = 0; i < bulk_kev_cnt; i++) {
bulk_kev_i = i;
if (kev[i].filter) {
(*((kq_callback *)kev[i].udata))(kev[i].udata, &kev[i]);
}
}
#if 0
} else {
log_kevent_struct(LOG_ERR, &kev);
}
#endif
}
bulk_kev = NULL;
return 0;
}
void
launchd_runtime(void)
{
mig_reply_error_t *req = NULL, *resp = NULL;
mach_msg_size_t mz = max_msg_size;
int flags = VM_MAKE_TAG(VM_MEMORY_MACH_MSG)|TRUE;
for (;;) {
if (req) {
launchd_assumes(vm_deallocate(mach_task_self(), (vm_address_t)req, mz) == KERN_SUCCESS);
req = NULL;
}
if (resp) {
launchd_assumes(vm_deallocate(mach_task_self(), (vm_address_t)resp, mz) == KERN_SUCCESS);
resp = NULL;
}
mz = max_msg_size;
if (!launchd_assumes(vm_allocate(mach_task_self(), (vm_address_t *)&req, mz, flags) == KERN_SUCCESS)) {
continue;
}
if (!launchd_assumes(vm_allocate(mach_task_self(), (vm_address_t *)&resp, mz, flags) == KERN_SUCCESS)) {
continue;
}
launchd_runtime2(mz, req, resp);
}
}
kern_return_t
launchd_set_bport(mach_port_t name)
{
return errno = task_set_bootstrap_port(mach_task_self(), name);
}
kern_return_t
launchd_get_bport(mach_port_t *name)
{
return errno = task_get_bootstrap_port(mach_task_self(), name);
}
kern_return_t
launchd_mport_notify_req(mach_port_t name, mach_msg_id_t which)
{
mach_port_mscount_t msgc = (which == MACH_NOTIFY_PORT_DESTROYED) ? 0 : 1;
mach_port_t previous, where = (which == MACH_NOTIFY_NO_SENDERS) ? name : launchd_internal_port;
if (which == MACH_NOTIFY_NO_SENDERS) {
errno = mach_port_set_mscount(mach_task_self(), name, 0);
if (errno != KERN_SUCCESS) {
return errno;
}
}
errno = mach_port_request_notification(mach_task_self(), name, which, msgc, where,
MACH_MSG_TYPE_MAKE_SEND_ONCE, &previous);
if (errno == 0 && previous != MACH_PORT_NULL) {
launchd_assumes(launchd_mport_deallocate(previous) == KERN_SUCCESS);
}
return errno;
}
pid_t
runtime_fork(mach_port_t bsport)
{
sigset_t emptyset, oset;
pid_t r = -1;
int saved_errno;
size_t i;
sigemptyset(&emptyset);
launchd_assumes(launchd_mport_make_send(bsport) == KERN_SUCCESS);
launchd_assumes(launchd_set_bport(bsport) == KERN_SUCCESS);
launchd_assumes(launchd_mport_deallocate(bsport) == KERN_SUCCESS);
launchd_assumes(sigprocmask(SIG_BLOCK, &sigign_set, &oset) != -1);
for (i = 0; i < (sizeof(sigigns) / sizeof(int)); i++) {
launchd_assumes(signal(sigigns[i], SIG_DFL) != SIG_ERR);
}
r = fork();
saved_errno = errno;
if (r != 0) {
for (i = 0; i < (sizeof(sigigns) / sizeof(int)); i++) {
launchd_assumes(signal(sigigns[i], SIG_IGN) != SIG_ERR);
}
launchd_assumes(sigprocmask(SIG_SETMASK, &oset, NULL) != -1);
launchd_assumes(launchd_set_bport(MACH_PORT_NULL) == KERN_SUCCESS);
} else {
launchd_assumes(sigprocmask(SIG_SETMASK, &emptyset, NULL) != -1);
}
errno = saved_errno;
return r;
}
void
runtime_set_timeout(timeout_callback to_cb, unsigned int sec)
{
if (sec == 0 || to_cb == NULL) {
runtime_idle_callback = NULL;
runtime_idle_timeout = 0;
}
runtime_idle_callback = to_cb;
runtime_idle_timeout = sec * 1000;
}
kern_return_t
runtime_add_mport(mach_port_t name, mig_callback demux, mach_msg_size_t msg_size)
{
size_t needed_table_sz = (MACH_PORT_INDEX(name) + 1) * sizeof(mig_callback);
mach_port_t target_set = demux ? ipc_port_set : demand_port_set;
msg_size = round_page(msg_size + MAX_TRAILER_SIZE);
if (needed_table_sz > mig_cb_table_sz) {
needed_table_sz *= 2;
mig_callback *new_table = malloc(needed_table_sz);
if (!launchd_assumes(new_table != NULL)) {
return KERN_RESOURCE_SHORTAGE;
}
if (mig_cb_table) {
memcpy(new_table, mig_cb_table, mig_cb_table_sz);
free(mig_cb_table);
}
mig_cb_table_sz = needed_table_sz;
mig_cb_table = new_table;
}
mig_cb_table[MACH_PORT_INDEX(name)] = demux;
if (msg_size > max_msg_size) {
max_msg_size = msg_size;
}
return errno = mach_port_move_member(mach_task_self(), name, target_set);
}
kern_return_t
runtime_remove_mport(mach_port_t name)
{
mig_cb_table[MACH_PORT_INDEX(name)] = NULL;
return errno = mach_port_move_member(mach_task_self(), name, MACH_PORT_NULL);
}
kern_return_t
launchd_mport_make_send(mach_port_t name)
{
return errno = mach_port_insert_right(mach_task_self(), name, name, MACH_MSG_TYPE_MAKE_SEND);
}
kern_return_t
launchd_mport_close_recv(mach_port_t name)
{
return errno = mach_port_mod_refs(mach_task_self(), name, MACH_PORT_RIGHT_RECEIVE, -1);
}
kern_return_t
launchd_mport_create_recv(mach_port_t *name)
{
return errno = mach_port_allocate(mach_task_self(), MACH_PORT_RIGHT_RECEIVE, name);
}
kern_return_t
launchd_mport_deallocate(mach_port_t name)
{
return errno = mach_port_deallocate(mach_task_self(), name);
}
int
kevent_bulk_mod(struct kevent *kev, size_t kev_cnt)
{
size_t i;
for (i = 0; i < kev_cnt; i++) {
kev[i].flags |= EV_CLEAR|EV_RECEIPT;
}
return kevent(mainkq, kev, kev_cnt, kev, kev_cnt, NULL);
}
int
kevent_mod(uintptr_t ident, short filter, u_short flags, u_int fflags, intptr_t data, void *udata)
{
struct kevent kev;
int r;
switch (filter) {
case EVFILT_READ:
case EVFILT_WRITE:
break;
default:
flags |= EV_CLEAR;
break;
}
flags |= EV_RECEIPT;
if (flags & EV_ADD && !launchd_assumes(udata != NULL)) {
errno = EINVAL;
return -1;
}
EV_SET(&kev, ident, filter, flags, fflags, data, udata);
r = kevent(mainkq, &kev, 1, &kev, 1, NULL);
if (!launchd_assumes(r == 1)) {
return -1;
}
if (launchd_assumes(kev.flags & EV_ERROR)) {
if ((flags & EV_ADD) && kev.data) {
runtime_syslog(LOG_DEBUG, "%s(): See the next line...", __func__);
log_kevent_struct(LOG_DEBUG, &kev, 0);
errno = kev.data;
return -1;
}
}
return r;
}
boolean_t
launchd_internal_demux(mach_msg_header_t *Request, mach_msg_header_t *Reply)
{
if (launchd_internal_server_routine(Request)) {
return launchd_internal_server(Request, Reply);
} else if (notify_server_routine(Request)) {
return notify_server(Request, Reply);
} else {
return mach_exc_server(Request, Reply);
}
}
kern_return_t
do_mach_notify_port_destroyed(mach_port_t notify, mach_port_t rights)
{
if (!launchd_assumes(job_ack_port_destruction(rights))) {
launchd_assumes(launchd_mport_close_recv(rights) == KERN_SUCCESS);
}
return KERN_SUCCESS;
}
kern_return_t
do_mach_notify_port_deleted(mach_port_t notify, mach_port_name_t name)
{
return KERN_SUCCESS;
}
kern_return_t
do_mach_notify_no_senders(mach_port_t notify, mach_port_mscount_t mscount)
{
job_t j = job_mig_intran(notify);
if (!launchd_assumes(j != NULL)) {
return KERN_FAILURE;
}
job_ack_no_senders(j);
return KERN_SUCCESS;
}
kern_return_t
do_mach_notify_send_once(mach_port_t notify)
{
return KERN_SUCCESS;
}
kern_return_t
do_mach_notify_dead_name(mach_port_t notify, mach_port_name_t name)
{
if (name == drain_reply_port) {
launchd_assumes(launchd_mport_deallocate(name) == KERN_SUCCESS);
drain_reply_port = MACH_PORT_NULL;
}
if (launchd_assumes(root_jobmgr != NULL)) {
root_jobmgr = jobmgr_delete_anything_with_port(root_jobmgr, name);
}
launchd_assumes(launchd_mport_deallocate(name) == KERN_SUCCESS);
return KERN_SUCCESS;
}
void
record_caller_creds(mach_msg_header_t *mh)
{
mach_msg_max_trailer_t *tp;
size_t trailer_size;
tp = (mach_msg_max_trailer_t *)((vm_offset_t)mh + round_msg(mh->msgh_size));
trailer_size = tp->msgh_trailer_size - (mach_msg_size_t)(sizeof(mach_msg_trailer_type_t) - sizeof(mach_msg_trailer_size_t));
if (trailer_size < (mach_msg_size_t)sizeof(audit_token_t)) {
au_tok = NULL;
return;
}
au_tok = &tp->msgh_audit;
}
bool
runtime_get_caller_creds(struct ldcred *ldc)
{
if (!au_tok) {
return false;
}
audit_token_to_au32(*au_tok, NULL, &ldc->euid,
&ldc->egid, &ldc->uid, &ldc->gid, &ldc->pid,
&ldc->asid, NULL);
return true;
}
void
launchd_runtime2(mach_msg_size_t msg_size, mig_reply_error_t *bufRequest, mig_reply_error_t *bufReply)
{
mach_msg_options_t options, tmp_options;
mig_reply_error_t *bufTemp;
mig_callback the_demux;
mach_msg_timeout_t to;
mach_msg_return_t mr;
options = MACH_RCV_MSG|MACH_RCV_TRAILER_ELEMENTS(MACH_RCV_TRAILER_AUDIT) |
MACH_RCV_TRAILER_TYPE(MACH_MSG_TRAILER_FORMAT_0);
tmp_options = options;
for (;;) {
to = MACH_MSG_TIMEOUT_NONE;
if (msg_size != max_msg_size) {
tmp_options &= ~MACH_RCV_MSG;
options &= ~MACH_RCV_MSG;
if (!(tmp_options & MACH_SEND_MSG)) {
return;
}
}
if ((tmp_options & MACH_RCV_MSG) && (runtime_idle_callback || (runtime_busy_cnt == 0))) {
tmp_options |= MACH_RCV_TIMEOUT;
if (!(tmp_options & MACH_SEND_TIMEOUT)) {
to = runtime_busy_cnt ? runtime_idle_timeout : (RUNTIME_ADVISABLE_IDLE_TIMEOUT * 1000);
}
}
runtime_log_push();
mr = mach_msg(&bufReply->Head, tmp_options, bufReply->Head.msgh_size,
msg_size, ipc_port_set, to, MACH_PORT_NULL);
tmp_options = options;
if (mr == MACH_SEND_INVALID_DEST || mr == MACH_SEND_TIMED_OUT) {
if (bufReply->Head.msgh_bits & MACH_MSGH_BITS_COMPLEX) {
mach_msg_destroy(&bufReply->Head);
}
continue;
} else if (mr == MACH_RCV_TIMED_OUT) {
if (to != MACH_MSG_TIMEOUT_NONE) {
if (runtime_busy_cnt == 0) {
launchd_shutdown();
} else if (runtime_idle_callback) {
runtime_idle_callback();
}
}
continue;
} else if (!launchd_assumes(mr == MACH_MSG_SUCCESS)) {
continue;
}
bufTemp = bufRequest;
bufRequest = bufReply;
bufReply = bufTemp;
if (!(tmp_options & MACH_RCV_MSG)) {
continue;
}
if (!launchd_assumes(mig_cb_table != NULL)) {
break;
}
the_demux = mig_cb_table[MACH_PORT_INDEX(bufRequest->Head.msgh_local_port)];
if (!launchd_assumes(the_demux != NULL)) {
break;
}
record_caller_creds(&bufRequest->Head);
static int no_hang_fd = -1;
if (no_hang_fd == -1) {
no_hang_fd = _fd(open("/dev/autofs_nowait", 0));
}
if (the_demux(&bufRequest->Head, &bufReply->Head) == FALSE) {
if (bufRequest->Head.msgh_id == MACH_NOTIFY_NO_SENDERS) {
notify_server(&bufRequest->Head, &bufReply->Head);
}
}
if (!(bufReply->Head.msgh_bits & MACH_MSGH_BITS_COMPLEX)) {
if (bufReply->RetCode == MIG_NO_REPLY) {
bufReply->Head.msgh_remote_port = MACH_PORT_NULL;
} else if ((bufReply->RetCode != KERN_SUCCESS) && (bufRequest->Head.msgh_bits & MACH_MSGH_BITS_COMPLEX)) {
bufRequest->Head.msgh_remote_port = MACH_PORT_NULL;
mach_msg_destroy(&bufRequest->Head);
}
}
if (bufReply->Head.msgh_remote_port != MACH_PORT_NULL) {
tmp_options |= MACH_SEND_MSG;
if (MACH_MSGH_BITS_REMOTE(bufReply->Head.msgh_bits) != MACH_MSG_TYPE_MOVE_SEND_ONCE) {
tmp_options |= MACH_SEND_TIMEOUT;
}
}
}
}
int
runtime_close(int fd)
{
int i;
if (bulk_kev) for (i = bulk_kev_i + 1; i < bulk_kev_cnt; i++) {
switch (bulk_kev[i].filter) {
case EVFILT_VNODE:
case EVFILT_WRITE:
case EVFILT_READ:
if ((int)bulk_kev[i].ident == fd) {
runtime_syslog(LOG_DEBUG, "Skipping kevent index: %d", i);
bulk_kev[i].filter = 0;
}
default:
break;
}
}
return close(fd);
}
static FILE *ourlogfile;
void
runtime_closelog(void)
{
if (ourlogfile) {
launchd_assumes(fflush(ourlogfile) == 0);
launchd_assumes(runtime_fsync(fileno(ourlogfile)) != -1);
}
}
int
runtime_fsync(int fd)
{
if (debug_shutdown_hangs) {
return fcntl(fd, F_FULLFSYNC, NULL);
} else {
return fsync(fd);
}
}
static int internal_mask_pri = LOG_UPTO(LOG_NOTICE);
int
runtime_setlogmask(int maskpri)
{
internal_mask_pri = maskpri;
return internal_mask_pri;
}
void
runtime_syslog(int pri, const char *message, ...)
{
struct runtime_syslog_attr attr = {
"com.apple.launchd", "com.apple.launchd",
getpid() == 1 ? "System" : "Background",
pri, getuid(), getpid(), getpid()
};
va_list ap;
va_start(ap, message);
runtime_vsyslog(&attr, message, ap);
va_end(ap);
}
void
runtime_vsyslog(struct runtime_syslog_attr *attr, const char *message, va_list args)
{
static pthread_mutex_t ourlock = PTHREAD_MUTEX_INITIALIZER;
static struct timeval shutdown_start;
static struct timeval prev_msg;
static int apple_internal_logging = 1;
struct timeval tvnow, tvd_total, tvd_msg_delta = { 0, 0 };
struct stat sb;
int saved_errno = errno;
char newmsg[10000];
size_t i, j;
if (!(LOG_MASK(attr->priority) & internal_mask_pri)) {
goto out;
}
if (apple_internal_logging == 1) {
apple_internal_logging = stat("/AppleInternal", &sb);
}
if (!(debug_shutdown_hangs && getpid() == 1)) {
if (attr->priority == LOG_APPLEONLY) {
if (apple_internal_logging == -1) {
goto out;
}
attr->priority = LOG_NOTICE;
}
vsnprintf(newmsg, sizeof(newmsg), message, args);
logmsg_add(attr, saved_errno, newmsg);
goto out;
}
if (shutdown_start.tv_sec == 0) {
gettimeofday(&shutdown_start, NULL);
}
if (gettimeofday(&tvnow, NULL) == -1) {
tvnow.tv_sec = 0;
tvnow.tv_usec = 0;
}
pthread_mutex_lock(&ourlock);
if (ourlogfile == NULL) {
rename("/var/log/launchd-shutdown.log", "/var/log/launchd-shutdown.log.1");
ourlogfile = fopen("/var/log/launchd-shutdown.log", "a");
}
pthread_mutex_unlock(&ourlock);
if (ourlogfile == NULL) {
goto out;
}
if (message == NULL) {
goto out;
}
timersub(&tvnow, &shutdown_start, &tvd_total);
if (prev_msg.tv_sec != 0) {
timersub(&tvnow, &prev_msg, &tvd_msg_delta);
}
prev_msg = tvnow;
snprintf(newmsg, sizeof(newmsg), "%3ld.%06d%4ld.%06d%6u %-40s%6u %-40s ",
tvd_total.tv_sec, tvd_total.tv_usec,
tvd_msg_delta.tv_sec, tvd_msg_delta.tv_usec,
attr->from_pid, attr->from_name,
attr->about_pid, attr->about_name);
for (i = 0, j = strlen(newmsg); message[i];) {
if (message[i] == '%' && message[i + 1] == 'm') {
char *errs = strerror(saved_errno);
strcpy(newmsg + j, errs ? errs : "unknown error");
j += strlen(newmsg + j);
i += 2;
} else {
newmsg[j] = message[i];
j++;
i++;
}
}
strcpy(newmsg + j, "\n");
vfprintf(ourlogfile, newmsg, args);
out:
runtime_log_uncork_pending_drain();
}
bool
logmsg_add(struct runtime_syslog_attr *attr, int err_num, const char *msg)
{
size_t lm_sz = sizeof(struct logmsg_s) + strlen(msg) + strlen(attr->from_name) + strlen(attr->about_name) + strlen(attr->session_name) + 4;
char *data_off;
struct logmsg_s *lm;
#define ROUND_TO_64BIT_WORD_SIZE(x) ((x + 7) & ~7)
lm_sz = ROUND_TO_64BIT_WORD_SIZE(lm_sz);
if (!(lm = calloc(1, lm_sz))) {
return false;
}
data_off = lm->data;
launchd_assumes(gettimeofday(&lm->when, NULL) != -1);
lm->from_pid = attr->from_pid;
lm->about_pid = attr->about_pid;
lm->err_num = err_num;
lm->pri = attr->priority;
lm->obj_sz = lm_sz;
lm->msg = data_off;
data_off += sprintf(data_off, "%s", msg) + 1;
lm->from_name = data_off;
data_off += sprintf(data_off, "%s", attr->from_name) + 1;
lm->about_name = data_off;
data_off += sprintf(data_off, "%s", attr->about_name) + 1;
lm->session_name = data_off;
data_off += sprintf(data_off, "%s", attr->session_name) + 1;
STAILQ_INSERT_TAIL(&logmsg_queue, lm, sqe);
logmsg_queue_sz += lm_sz;
logmsg_queue_cnt++;
return true;
}
void
logmsg_remove(struct logmsg_s *lm)
{
STAILQ_REMOVE(&logmsg_queue, lm, logmsg_s, sqe);
logmsg_queue_sz -= lm->obj_sz;
logmsg_queue_cnt--;
free(lm);
}
kern_return_t
runtime_log_pack(vm_offset_t *outval, mach_msg_type_number_t *outvalCnt)
{
struct logmsg_s *lm;
void *offset;
*outvalCnt = logmsg_queue_sz;
mig_allocate(outval, *outvalCnt);
if (*outval == 0) {
return 1;
}
offset = (void *)*outval;
while ((lm = STAILQ_FIRST(&logmsg_queue))) {
lm->from_name -= (size_t)lm;
lm->about_name -= (size_t)lm;
lm->msg -= (size_t)lm;
lm->session_name -= (size_t)lm;
memcpy(offset, lm, lm->obj_sz);
offset += lm->obj_sz;
logmsg_remove(lm);
}
return 0;
}
void
runtime_log_uncork_pending_drain(void)
{
mach_msg_type_number_t outvalCnt;
mach_port_t tmp_port;
vm_offset_t outval;
if (!drain_reply_port) {
return;
}
if (logmsg_queue_cnt == 0) {
return;
}
if (runtime_log_pack(&outval, &outvalCnt) != 0) {
return;
}
tmp_port = drain_reply_port;
drain_reply_port = MACH_PORT_NULL;
if ((errno = job_mig_log_drain_reply(tmp_port, 0, outval, outvalCnt))) {
launchd_assumes(errno == MACH_SEND_INVALID_DEST);
launchd_assumes(launchd_mport_deallocate(tmp_port) == KERN_SUCCESS);
}
mig_deallocate(outval, outvalCnt);
}
void
runtime_log_push(void)
{
mach_msg_type_number_t outvalCnt;
vm_offset_t outval;
if (logmsg_queue_cnt == 0) {
launchd_assumes(STAILQ_EMPTY(&logmsg_queue));
return;
} else if (getpid() == 1) {
return;
}
if (runtime_log_pack(&outval, &outvalCnt) != 0) {
return;
}
launchd_assumes(_vprocmgr_log_forward(inherited_bootstrap_port, (void *)outval, outvalCnt) == NULL);
mig_deallocate(outval, outvalCnt);
}
kern_return_t
runtime_log_forward(uid_t forward_uid, gid_t forward_gid, vm_offset_t inval, mach_msg_type_number_t invalCnt)
{
struct logmsg_s *lm, *lm_walk;
mach_msg_type_number_t data_left = invalCnt;
if (inval == 0) {
return 0;
}
for (lm_walk = (struct logmsg_s *)inval; (data_left > 0) && (lm_walk->obj_sz <= data_left); lm_walk = ((void *)lm_walk + lm_walk->obj_sz)) {
if (!launchd_assumes(lm = malloc(lm_walk->obj_sz))) {
continue;
}
memcpy(lm, lm_walk, lm_walk->obj_sz);
lm->sender_uid = forward_uid;
lm->sender_gid = forward_gid;
lm->from_name += (size_t)lm;
lm->about_name += (size_t)lm;
lm->msg += (size_t)lm;
lm->session_name += (size_t)lm;
STAILQ_INSERT_TAIL(&logmsg_queue, lm, sqe);
logmsg_queue_sz += lm->obj_sz;
logmsg_queue_cnt++;
data_left -= lm->obj_sz;
}
mig_deallocate(inval, invalCnt);
return 0;
}
kern_return_t
runtime_log_drain(mach_port_t srp, vm_offset_t *outval, mach_msg_type_number_t *outvalCnt)
{
if (logmsg_queue_cnt == 0) {
launchd_assumes(STAILQ_EMPTY(&logmsg_queue));
launchd_assumes(drain_reply_port == 0);
drain_reply_port = srp;
launchd_assumes(launchd_mport_notify_req(drain_reply_port, MACH_NOTIFY_DEAD_NAME) == KERN_SUCCESS);
return MIG_NO_REPLY;
}
return runtime_log_pack(outval, outvalCnt);
}
void
runtime_add_ref(void)
{
runtime_busy_cnt++;
}
void
runtime_del_ref(void)
{
runtime_busy_cnt--;
}
kern_return_t
catch_mach_exception_raise(mach_port_t exception_port, mach_port_t thread, mach_port_t task,
exception_type_t exception, mach_exception_data_t code, mach_msg_type_number_t codeCnt)
{
runtime_syslog(LOG_NOTICE, "%s(): thread: 0x%x task: 0x%x type: 0x%x code: %p codeCnt: 0x%x",
__func__, thread, task, exception, code, codeCnt);
launchd_assumes(launchd_mport_deallocate(thread) == KERN_SUCCESS);
launchd_assumes(launchd_mport_deallocate(task) == KERN_SUCCESS);
return 0;
}
kern_return_t
catch_mach_exception_raise_state(mach_port_t exception_port,
exception_type_t exception, const mach_exception_data_t code, mach_msg_type_number_t codeCnt,
int *flavor, const thread_state_t old_state, mach_msg_type_number_t old_stateCnt,
thread_state_t new_state, mach_msg_type_number_t *new_stateCnt)
{
runtime_syslog(LOG_NOTICE, "%s(): type: 0x%x code: %p codeCnt: 0x%x flavor: %p old_state: %p old_stateCnt: 0x%x new_state: %p new_stateCnt: %p",
__func__, exception, code, codeCnt, flavor, old_state, old_stateCnt, new_state, new_stateCnt);
memcpy(new_state, old_state, old_stateCnt * sizeof(old_state[0]));
*new_stateCnt = old_stateCnt;
return 0;
}
kern_return_t
catch_mach_exception_raise_state_identity(mach_port_t exception_port, mach_port_t thread, mach_port_t task,
exception_type_t exception, mach_exception_data_t code, mach_msg_type_number_t codeCnt,
int *flavor, thread_state_t old_state, mach_msg_type_number_t old_stateCnt,
thread_state_t new_state, mach_msg_type_number_t *new_stateCnt)
{
runtime_syslog(LOG_NOTICE, "%s(): thread: 0x%x task: 0x%x type: 0x%x code: %p codeCnt: 0x%x flavor: %p old_state: %p old_stateCnt: 0x%x new_state: %p new_stateCnt: %p",
__func__, thread, task, exception, code, codeCnt, flavor, old_state, old_stateCnt, new_state, new_stateCnt);
memcpy(new_state, old_state, old_stateCnt * sizeof(old_state[0]));
*new_stateCnt = old_stateCnt;
launchd_assumes(launchd_mport_deallocate(thread) == KERN_SUCCESS);
launchd_assumes(launchd_mport_deallocate(task) == KERN_SUCCESS);
return 0;
}