#include <SystemConfiguration/SystemConfiguration.h>
#include <SystemConfiguration/SCPrivate.h>
#include "SCPreferencesInternal.h"
#include "SCHelper_client.h"
#include <fcntl.h>
#include <unistd.h>
#include <sys/errno.h>
static Boolean
__SCPreferencesCommitChanges_helper(SCPreferencesRef prefs)
{
CFDataRef data = NULL;
Boolean ok;
SCPreferencesPrivateRef prefsPrivate = (SCPreferencesPrivateRef)prefs;
uint32_t status = kSCStatusOK;
CFDataRef reply = NULL;
if (prefsPrivate->helper == -1) {
goto fail;
}
if (prefsPrivate->changed) {
ok = _SCSerialize(prefsPrivate->prefs, &data, NULL, NULL);
if (!ok) {
goto fail;
}
}
ok = _SCHelperExec(prefsPrivate->helper,
SCHELPER_MSG_PREFS_COMMIT,
data,
&status,
&reply);
if (data != NULL) CFRelease(data);
if (!ok) {
goto fail;
}
if (status != kSCStatusOK) {
goto error;
}
if (prefsPrivate->changed) {
if (prefsPrivate->signature != NULL) CFRelease(prefsPrivate->signature);
prefsPrivate->signature = reply;
}
prefsPrivate->changed = FALSE;
return TRUE;
fail :
if (prefsPrivate->helper != -1) {
_SCHelperClose(prefsPrivate->helper);
prefsPrivate->helper = -1;
}
status = kSCStatusAccessError;
error :
if (reply != NULL) CFRelease(reply);
_SCErrorSet(status);
return FALSE;
}
static ssize_t
writen(int ref, const void *data, size_t len)
{
size_t left = len;
ssize_t n;
const void *p = data;
while (left > 0) {
if ((n = write(ref, p, left)) == -1) {
if (errno != EINTR) {
return -1;
}
n = 0;
}
left -= n;
p += n;
}
return len;
}
Boolean
SCPreferencesCommitChanges(SCPreferencesRef prefs)
{
Boolean ok = FALSE;
SCPreferencesPrivateRef prefsPrivate = (SCPreferencesPrivateRef)prefs;
Boolean wasLocked;
if (prefs == NULL) {
_SCErrorSet(kSCStatusNoPrefsSession);
return FALSE;
}
wasLocked = prefsPrivate->locked;
if (!wasLocked) {
if (!SCPreferencesLock(prefs, TRUE)) {
SCLog(_sc_verbose, LOG_ERR, CFSTR("SCPreferencesCommitChanges SCPreferencesLock() failed"));
return FALSE;
}
}
if (prefsPrivate->authorizationData != NULL) {
ok = __SCPreferencesCommitChanges_helper(prefs);
if (ok) {
prefsPrivate->changed = FALSE;
}
goto done;
}
if (prefsPrivate->changed) {
int fd;
CFDataRef newPrefs;
char * path;
int pathLen;
struct stat statBuf;
char * thePath;
if (stat(prefsPrivate->path, &statBuf) == -1) {
if (errno == ENOENT) {
bzero(&statBuf, sizeof(statBuf));
statBuf.st_mode = 0644;
statBuf.st_uid = geteuid();
statBuf.st_gid = getegid();
} else {
SCLog(_sc_verbose, LOG_ERR, CFSTR("SCPreferencesCommitChanges stat() failed: %s"), strerror(errno));
goto done;
}
}
path = prefsPrivate->newPath ? prefsPrivate->newPath : prefsPrivate->path;
pathLen = strlen(path) + sizeof("-new");
thePath = CFAllocatorAllocate(NULL, pathLen, 0);
snprintf(thePath, pathLen, "%s-new", path);
fd = open(thePath, O_WRONLY|O_CREAT, statBuf.st_mode);
if (fd == -1) {
_SCErrorSet(errno);
SCLog(_sc_verbose, LOG_ERR, CFSTR("SCPreferencesCommitChanges open() failed: %s"), strerror(errno));
CFAllocatorDeallocate(NULL, thePath);
goto done;
}
(void) fchown(fd, statBuf.st_uid, statBuf.st_gid);
(void) fchmod(fd, statBuf.st_mode);
newPrefs = CFPropertyListCreateXMLData(NULL, prefsPrivate->prefs);
if (!newPrefs) {
_SCErrorSet(kSCStatusFailed);
SCLog(_sc_verbose, LOG_ERR, CFSTR("SCPreferencesCommitChanges CFPropertyListCreateXMLData() failed"));
SCLog(_sc_verbose, LOG_ERR, CFSTR(" prefs = %s"), path);
CFAllocatorDeallocate(NULL, thePath);
(void) close(fd);
goto done;
}
if (writen(fd, (const void *)CFDataGetBytePtr(newPrefs), CFDataGetLength(newPrefs)) == -1) {
_SCErrorSet(errno);
SCLog(_sc_verbose, LOG_ERR, CFSTR("SCPreferencesCommitChanges write() failed: %s"), strerror(errno));
SCLog(_sc_verbose, LOG_ERR, CFSTR(" path = %s"), thePath);
(void) unlink(thePath);
CFAllocatorDeallocate(NULL, thePath);
(void) close(fd);
CFRelease(newPrefs);
goto done;
}
#if !TARGET_OS_IPHONE
if (fsync(fd) == -1) {
_SCErrorSet(errno);
SCLog(_sc_verbose, LOG_ERR, CFSTR("SCPreferencesCommitChanges fsync() failed: %s"), strerror(errno));
SCLog(_sc_verbose, LOG_ERR, CFSTR(" path = %s"), thePath);
(void) unlink(thePath);
CFAllocatorDeallocate(NULL, thePath);
(void) close(fd);
CFRelease(newPrefs);
goto done;
}
(void) fcntl(fd, F_FULLFSYNC, 0);
#endif // !TARGET_OS_IPHONE
if (close(fd) == -1) {
_SCErrorSet(errno);
SCLog(_sc_verbose, LOG_ERR, CFSTR("SCPreferencesCommitChanges close() failed: %s"), strerror(errno));
SCLog(_sc_verbose, LOG_ERR, CFSTR(" path = %s"), thePath);
(void) unlink(thePath);
CFAllocatorDeallocate(NULL, thePath);
CFRelease(newPrefs);
goto done;
}
CFRelease(newPrefs);
if (rename(thePath, path) == -1) {
_SCErrorSet(errno);
SCLog(_sc_verbose, LOG_ERR, CFSTR("SCPreferencesCommitChanges rename() failed: %s"), strerror(errno));
SCLog(_sc_verbose, LOG_ERR, CFSTR(" path = %s --> %s"), thePath, path);
CFAllocatorDeallocate(NULL, thePath);
goto done;
}
CFAllocatorDeallocate(NULL, thePath);
if (prefsPrivate->newPath) {
(void) unlink(prefsPrivate->path);
(void) symlink(prefsPrivate->newPath, prefsPrivate->path);
CFAllocatorDeallocate(NULL, prefsPrivate->path);
prefsPrivate->path = path;
prefsPrivate->newPath = NULL;
}
if (stat(path, &statBuf) == -1) {
_SCErrorSet(errno);
SCLog(_sc_verbose, LOG_ERR, CFSTR("SCPreferencesCommitChanges stat() failed: %s"), strerror(errno));
SCLog(_sc_verbose, LOG_ERR, CFSTR(" path = %s"), thePath);
goto done;
}
if (prefsPrivate->signature != NULL) CFRelease(prefsPrivate->signature);
prefsPrivate->signature = __SCPSignatureFromStatbuf(&statBuf);
}
if (prefsPrivate->session == NULL) {
ok = TRUE;
} else {
ok = SCDynamicStoreNotifyValue(prefsPrivate->session, prefsPrivate->sessionKeyCommit);
if (!ok) {
SCLog(_sc_verbose, LOG_ERR, CFSTR("SCPreferencesCommitChanges SCDynamicStoreNotifyValue() failed"));
_SCErrorSet(kSCStatusFailed);
goto done;
}
}
prefsPrivate->changed = FALSE;
done :
if (!wasLocked) (void) SCPreferencesUnlock(prefs);
return ok;
}