_notifyviasignal.c [plain text]
#include <unistd.h>
#include <sys/types.h>
#include "configd.h"
#include "configd_server.h"
#include "session.h"
__private_extern__
int
__SCDynamicStoreNotifySignal(SCDynamicStoreRef store, pid_t pid, int sig)
{
SCDynamicStorePrivateRef storePrivate = (SCDynamicStorePrivateRef)store;
CFStringRef sessionKey;
CFDictionaryRef info;
if ((store == NULL) || (storePrivate->server == MACH_PORT_NULL)) {
return kSCStatusNoStoreSession;
}
if (storePrivate->notifyStatus != NotifierNotRegistered) {
return kSCStatusNotifierActive;
}
if (pid == getpid()) {
return kSCStatusInvalidArgument;
}
if ((sig <= 0) || (sig > NSIG)) {
return kSCStatusInvalidArgument;
}
sessionKey = CFStringCreateWithFormat(NULL, NULL, CFSTR("%d"), storePrivate->server);
info = CFDictionaryGetValue(sessionData, sessionKey);
CFRelease(sessionKey);
if (info && CFDictionaryContainsKey(info, kSCDChangedKeys)) {
CFNumberRef sessionNum;
if (needsNotification == NULL)
needsNotification = CFSetCreateMutable(NULL,
0,
&kCFTypeSetCallBacks);
sessionNum = CFNumberCreate(NULL, kCFNumberIntType, &storePrivate->server);
CFSetAddValue(needsNotification, sessionNum);
CFRelease(sessionNum);
}
return kSCStatusOK;
}
__private_extern__
kern_return_t
_notifyviasignal(mach_port_t server,
task_t task,
int sig,
int *sc_status)
{
serverSessionRef mySession = getSession(server);
pid_t pid;
kern_return_t status;
SCDynamicStorePrivateRef storePrivate;
if (mySession == NULL) {
*sc_status = kSCStatusNoStoreSession;
if (task != TASK_NULL) {
(void) mach_port_deallocate(mach_task_self(), task);
}
return KERN_SUCCESS;
}
storePrivate = (SCDynamicStorePrivateRef)mySession->store;
if (task != TASK_NULL) {
status = pid_for_task(task, &pid);
if (status != KERN_SUCCESS) {
*sc_status = kSCStatusFailed;
(void) mach_port_deallocate(mach_task_self(), task);
return KERN_SUCCESS;
}
} else {
*sc_status = kSCStatusInvalidArgument;
return KERN_SUCCESS;
}
*sc_status = __SCDynamicStoreNotifySignal(mySession->store, pid, sig);
if (*sc_status != kSCStatusOK) {
__MACH_PORT_DEBUG(TRUE, "*** _notifyviasignal __SCDynamicStoreNotifySignal failed: releasing task)", task);
(void) mach_port_deallocate(mach_task_self(), task);
return KERN_SUCCESS;
}
__MACH_PORT_DEBUG(TRUE, "*** _notifyviasignal", task);
storePrivate->notifyStatus = Using_NotifierInformViaSignal;
storePrivate->notifySignal = sig;
storePrivate->notifySignalTask = task;
return KERN_SUCCESS;
}