#include "config.h"
#include "libvproc_public.h"
#include "libvproc_private.h"
#include "libvproc_internal.h"
#include <mach/mach.h>
#include <mach/vm_map.h>
#include <sys/param.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <syslog.h>
#include <pthread.h>
#include "liblaunch_public.h"
#include "liblaunch_private.h"
#include "liblaunch_internal.h"
#include "protocol_vproc.h"
#include "reboot2.h"
static mach_port_t get_root_bootstrap_port(void);
static int64_t cached_pid = -1;
kern_return_t
_vproc_grab_subset(mach_port_t bp, mach_port_t *reqport, mach_port_t *rcvright, launch_data_t *outval,
mach_port_array_t *ports, mach_msg_type_number_t *portCnt)
{
mach_msg_type_number_t outdata_cnt;
vm_offset_t outdata = 0;
size_t data_offset = 0;
launch_data_t out_obj;
kern_return_t kr;
if ((kr = vproc_mig_take_subset(bp, reqport, rcvright, &outdata, &outdata_cnt, ports, portCnt))) {
goto out;
}
if ((out_obj = launch_data_unpack((void *)outdata, outdata_cnt, NULL, 0, &data_offset, NULL))) {
*outval = launch_data_copy(out_obj);
} else {
kr = 1;
}
out:
if (outdata) {
mig_deallocate(outdata, outdata_cnt);
}
return kr;
}
vproc_err_t
_vproc_post_fork_ping(void)
{
return vproc_mig_post_fork_ping(bootstrap_port, mach_task_self()) == 0 ? NULL : _vproc_post_fork_ping;
}
static void
setup_env_hack(const launch_data_t obj, const char *key, void *context __attribute__((unused)))
{
setenv(key, launch_data_get_string(obj), 1);
}
vproc_err_t
_vprocmgr_init(const char *session_type)
{
if (vproc_mig_move_subset(bootstrap_port, MACH_PORT_NULL, (char *)session_type) == 0) {
return NULL;
}
return (vproc_err_t)_vprocmgr_init;
}
vproc_err_t
_vprocmgr_move_subset_to_user(uid_t target_user, const char *session_type)
{
launch_data_t output_obj;
kern_return_t kr = 0;
bool is_bkgd = (strcmp(session_type, VPROCMGR_SESSION_BACKGROUND) == 0);
int64_t ldpid, lduid;
if (vproc_swap_integer(NULL, VPROC_GSK_MGR_PID, 0, &ldpid) != 0) {
return (vproc_err_t)_vprocmgr_move_subset_to_user;
}
if (vproc_swap_integer(NULL, VPROC_GSK_MGR_UID, 0, &lduid) != 0) {
return (vproc_err_t)_vprocmgr_move_subset_to_user;
}
if (!is_bkgd && ldpid != 1) {
if (lduid == getuid()) {
return NULL;
}
return (vproc_err_t)_vprocmgr_move_subset_to_user;
}
if (is_bkgd || target_user) {
mach_port_t puc = 0, rootbs = get_root_bootstrap_port();
if (vproc_mig_lookup_per_user_context(rootbs, target_user, &puc) != 0) {
return (vproc_err_t)_vprocmgr_move_subset_to_user;
}
if (is_bkgd) {
task_set_bootstrap_port(mach_task_self(), puc);
mach_port_deallocate(mach_task_self(), bootstrap_port);
bootstrap_port = puc;
} else {
kr = vproc_mig_move_subset(puc, bootstrap_port, (char *)session_type);
mach_port_deallocate(mach_task_self(), puc);
}
} else {
kr = _vprocmgr_init(session_type) ? 1 : 0;
}
cached_pid = -1;
if (kr) {
return (vproc_err_t)_vprocmgr_move_subset_to_user;
}
if (getprogname() && strcmp(getprogname(), "nohup") != 0) {
if (vproc_swap_complex(NULL, VPROC_GSK_ENVIRONMENT, NULL, &output_obj) == NULL) {
if (launch_data_get_type(output_obj) == LAUNCH_DATA_DICTIONARY) {
launch_data_dict_iterate(output_obj, setup_env_hack, NULL);
launch_data_free(output_obj);
}
}
}
return _vproc_post_fork_ping();
}
pid_t
_spawn_via_launchd(const char *label, const char *const *argv, const struct spawn_via_launchd_attr *spawn_attrs, int struct_version)
{
size_t i, good_enough_size = 10*1024*1024;
mach_msg_type_number_t indata_cnt = 0;
vm_offset_t indata = 0;
mach_port_t obsvr_port = MACH_PORT_NULL;
launch_data_t tmp, tmp_array, in_obj;
const char *const *tmpp;
kern_return_t kr = 1;
void *buf = NULL;
pid_t p = -1;
if ((in_obj = launch_data_alloc(LAUNCH_DATA_DICTIONARY)) == NULL) {
goto out;
}
if ((tmp = launch_data_new_string(label)) == NULL) {
goto out;
}
launch_data_dict_insert(in_obj, tmp, LAUNCH_JOBKEY_LABEL);
if ((tmp_array = launch_data_alloc(LAUNCH_DATA_ARRAY)) == NULL) {
goto out;
}
for (i = 0; *argv; i++, argv++) {
tmp = launch_data_new_string(*argv);
if (tmp == NULL) {
goto out;
}
launch_data_array_set_index(tmp_array, tmp, i);
}
launch_data_dict_insert(in_obj, tmp_array, LAUNCH_JOBKEY_PROGRAMARGUMENTS);
if (spawn_attrs) switch (struct_version) {
case 2:
if (spawn_attrs->spawn_quarantine) {
char qbuf[QTN_SERIALIZED_DATA_MAX];
size_t qbuf_sz = QTN_SERIALIZED_DATA_MAX;
if (qtn_proc_to_data(spawn_attrs->spawn_quarantine, qbuf, &qbuf_sz) == 0) {
tmp = launch_data_new_opaque(qbuf, qbuf_sz);
launch_data_dict_insert(in_obj, tmp, LAUNCH_JOBKEY_QUARANTINEDATA);
}
}
if (spawn_attrs->spawn_seatbelt_profile) {
tmp = launch_data_new_string(spawn_attrs->spawn_seatbelt_profile);
launch_data_dict_insert(in_obj, tmp, LAUNCH_JOBKEY_SANDBOXPROFILE);
}
if (spawn_attrs->spawn_seatbelt_flags) {
tmp = launch_data_new_integer(*spawn_attrs->spawn_seatbelt_flags);
launch_data_dict_insert(in_obj, tmp, LAUNCH_JOBKEY_SANDBOXFLAGS);
}
case 1:
if (spawn_attrs->spawn_binpref) {
tmp_array = launch_data_alloc(LAUNCH_DATA_ARRAY);
for (i = 0; i < spawn_attrs->spawn_binpref_cnt; i++) {
tmp = launch_data_new_integer(spawn_attrs->spawn_binpref[i]);
launch_data_array_set_index(tmp_array, tmp, i);
}
launch_data_dict_insert(in_obj, tmp_array, LAUNCH_JOBKEY_BINARYORDERPREFERENCE);
}
case 0:
if (spawn_attrs->spawn_flags & SPAWN_VIA_LAUNCHD_STOPPED) {
tmp = launch_data_new_bool(true);
launch_data_dict_insert(in_obj, tmp, LAUNCH_JOBKEY_WAITFORDEBUGGER);
}
if (spawn_attrs->spawn_env) {
launch_data_t tmp_dict = launch_data_alloc(LAUNCH_DATA_DICTIONARY);
for (tmpp = spawn_attrs->spawn_env; *tmpp; tmpp++) {
char *eqoff, tmpstr[strlen(*tmpp) + 1];
strcpy(tmpstr, *tmpp);
eqoff = strchr(tmpstr, '=');
if (!eqoff) {
goto out;
}
*eqoff = '\0';
launch_data_dict_insert(tmp_dict, launch_data_new_string(eqoff + 1), tmpstr);
}
launch_data_dict_insert(in_obj, tmp_dict, LAUNCH_JOBKEY_ENVIRONMENTVARIABLES);
}
if (spawn_attrs->spawn_path) {
tmp = launch_data_new_string(spawn_attrs->spawn_path);
launch_data_dict_insert(in_obj, tmp, LAUNCH_JOBKEY_PROGRAM);
}
if (spawn_attrs->spawn_chdir) {
tmp = launch_data_new_string(spawn_attrs->spawn_chdir);
launch_data_dict_insert(in_obj, tmp, LAUNCH_JOBKEY_WORKINGDIRECTORY);
}
if (spawn_attrs->spawn_umask) {
tmp = launch_data_new_integer(*spawn_attrs->spawn_umask);
launch_data_dict_insert(in_obj, tmp, LAUNCH_JOBKEY_UMASK);
}
break;
default:
break;
}
if (!(buf = malloc(good_enough_size))) {
goto out;
}
if ((indata_cnt = launch_data_pack(in_obj, buf, good_enough_size, NULL, NULL)) == 0) {
goto out;
}
indata = (vm_offset_t)buf;
kr = vproc_mig_spawn(bootstrap_port, indata, indata_cnt, &p, &obsvr_port);
if (kr == VPROC_ERR_TRY_PER_USER) {
mach_port_t puc;
if (vproc_mig_lookup_per_user_context(bootstrap_port, 0, &puc) == 0) {
kr = vproc_mig_spawn(puc, indata, indata_cnt, &p, &obsvr_port);
mach_port_deallocate(mach_task_self(), puc);
}
}
out:
if (in_obj) {
launch_data_free(in_obj);
}
if (buf) {
free(buf);
}
switch (kr) {
case BOOTSTRAP_SUCCESS:
if (spawn_attrs && spawn_attrs->spawn_observer_port) {
*spawn_attrs->spawn_observer_port = obsvr_port;
} else {
mach_port_deallocate(mach_task_self(), obsvr_port);
}
return p;
case BOOTSTRAP_NOT_PRIVILEGED:
errno = EPERM; break;
case BOOTSTRAP_NO_MEMORY:
errno = ENOMEM; break;
case BOOTSTRAP_NAME_IN_USE:
errno = EEXIST; break;
case 1:
errno = EIO; break;
default:
errno = EINVAL; break;
}
return -1;
}
kern_return_t
mpm_wait(mach_port_t ajob __attribute__((unused)), int *wstatus)
{
return vproc_mig_wait(ajob, wstatus);
}
kern_return_t
mpm_uncork_fork(mach_port_t ajob)
{
return vproc_mig_uncork_fork(ajob);
}
kern_return_t
_vprocmgr_getsocket(name_t sockpath)
{
return vproc_mig_getsocket(bootstrap_port, sockpath);
}
vproc_err_t
_vproc_get_last_exit_status(int *wstatus)
{
int64_t val;
if (vproc_swap_integer(NULL, VPROC_GSK_LAST_EXIT_STATUS, 0, &val) == 0) {
*wstatus = (int)val;
return NULL;
}
return (vproc_err_t)_vproc_get_last_exit_status;
}
vproc_err_t
_vproc_send_signal_by_label(const char *label, int sig)
{
if (vproc_mig_send_signal(bootstrap_port, (char *)label, sig) == 0) {
return NULL;
}
return _vproc_send_signal_by_label;
}
vproc_err_t
_vprocmgr_log_forward(mach_port_t mp, void *data, size_t len)
{
if (vproc_mig_log_forward(mp, (vm_offset_t)data, len) == 0) {
return NULL;
}
return _vprocmgr_log_forward;
}
vproc_err_t
_vprocmgr_log_drain(vproc_t vp __attribute__((unused)), pthread_mutex_t *mutex, _vprocmgr_log_drain_callback_t func)
{
mach_msg_type_number_t outdata_cnt, tmp_cnt;
vm_offset_t outdata = 0;
struct logmsg_s *lm;
if (!func) {
return _vprocmgr_log_drain;
}
if (vproc_mig_log_drain(bootstrap_port, &outdata, &outdata_cnt) != 0) {
return _vprocmgr_log_drain;
}
tmp_cnt = outdata_cnt;
if (mutex) {
pthread_mutex_lock(mutex);
}
for (lm = (struct logmsg_s *)outdata; tmp_cnt > 0; lm = ((void *)lm + lm->obj_sz)) {
lm->from_name += (size_t)lm;
lm->about_name += (size_t)lm;
lm->msg += (size_t)lm;
lm->session_name += (size_t)lm;
func(&lm->when, lm->from_pid, lm->about_pid, lm->sender_uid, lm->sender_gid, lm->pri,
lm->from_name, lm->about_name, lm->session_name, lm->msg);
tmp_cnt -= lm->obj_sz;
}
if (mutex) {
pthread_mutex_unlock(mutex);
}
if (outdata) {
mig_deallocate(outdata, outdata_cnt);
}
return NULL;
}
vproc_err_t
vproc_swap_integer(vproc_t vp __attribute__((unused)), vproc_gsk_t key, int64_t *inval, int64_t *outval)
{
static int64_t cached_is_managed = -1;
int64_t dummyval = 0;
switch (key) {
case VPROC_GSK_MGR_PID:
if (cached_pid != -1 && outval) {
*outval = cached_pid;
return NULL;
}
break;
case VPROC_GSK_IS_MANAGED:
if (cached_is_managed != -1 && outval) {
*outval = cached_is_managed;
return NULL;
}
break;
default:
break;
}
if (vproc_mig_swap_integer(bootstrap_port, inval ? key : 0, outval ? key : 0, inval ? *inval : 0, outval ? outval : &dummyval) == 0) {
switch (key) {
case VPROC_GSK_MGR_PID:
cached_pid = outval ? *outval : dummyval;
break;
case VPROC_GSK_IS_MANAGED:
cached_is_managed = outval ? *outval : dummyval;
break;
default:
break;
}
return NULL;
}
return (vproc_err_t)vproc_swap_integer;
}
mach_port_t
get_root_bootstrap_port(void)
{
mach_port_t parent_port = 0;
mach_port_t previous_port = 0;
do {
if (previous_port) {
if (previous_port != bootstrap_port) {
mach_port_deallocate(mach_task_self(), previous_port);
}
previous_port = parent_port;
} else {
previous_port = bootstrap_port;
}
if (bootstrap_parent(previous_port, &parent_port) != 0) {
return MACH_PORT_NULL;
}
} while (parent_port != previous_port);
return parent_port;
}
vproc_err_t
vproc_swap_complex(vproc_t vp __attribute__((unused)), vproc_gsk_t key, launch_data_t inval, launch_data_t *outval)
{
size_t data_offset = 0, good_enough_size = 10*1024*1024;
mach_msg_type_number_t indata_cnt = 0, outdata_cnt;
vm_offset_t indata = 0, outdata = 0;
launch_data_t out_obj;
void *rval = vproc_swap_complex;
void *buf = NULL;
if (inval) {
if (!(buf = malloc(good_enough_size))) {
goto out;
}
if ((indata_cnt = launch_data_pack(inval, buf, good_enough_size, NULL, NULL)) == 0) {
goto out;
}
indata = (vm_offset_t)buf;
}
if (vproc_mig_swap_complex(bootstrap_port, inval ? key : 0, outval ? key : 0, indata, indata_cnt, &outdata, &outdata_cnt) != 0) {
goto out;
}
if (outval) {
if (!(out_obj = launch_data_unpack((void *)outdata, outdata_cnt, NULL, 0, &data_offset, NULL))) {
goto out;
}
if (!(*outval = launch_data_copy(out_obj))) {
goto out;
}
}
rval = NULL;
out:
if (buf) {
free(buf);
}
if (outdata) {
mig_deallocate(outdata, outdata_cnt);
}
return rval;
}
void *
reboot2(uint64_t flags)
{
if (vproc_mig_reboot2(get_root_bootstrap_port(), flags) == 0) {
return NULL;
}
return reboot2;
}
vproc_err_t
_vproc_set_global_on_demand(bool state)
{
int64_t val = state ? ~0 : 0;
if (vproc_swap_integer(NULL, VPROC_GSK_GLOBAL_ON_DEMAND, &val, NULL) == 0) {
return NULL;
}
return (vproc_err_t)_vproc_set_global_on_demand;
}
void
_vproc_logv(int pri, int err, const char *msg, va_list ap)
{
char flat_msg[3000];
vsnprintf(flat_msg, sizeof(flat_msg), msg, ap);
vproc_mig_log(bootstrap_port, pri, err, flat_msg);
}
void
_vproc_log(int pri, const char *msg, ...)
{
va_list ap;
va_start(ap, msg);
_vproc_logv(pri, 0, msg, ap);
va_end(ap);
}
void
_vproc_log_error(int pri, const char *msg, ...)
{
int saved_errno = errno;
va_list ap;
va_start(ap, msg);
_vproc_logv(pri, saved_errno, msg, ap);
va_end(ap);
}