Bool
DnDStagingDirectoryUsable(ConstUnicode pathName) // IN:
{
struct stat buf;
if (Posix_Stat(pathName, &buf) < 0) {
return FALSE;
}
return buf.st_uid == Id_GetEUid();
}
void
Id_EndSuperUser(uid_t uid) // IN:
{
if ((uid != (uid_t) -1) && (uid != Id_GetEUid())) {
ASSERT(uid != 0); // Don't allow cheating like this
#if defined(__APPLE__)
if (syscall(SYS_settid, uid, getgid()) == -1) {
Log("Failed to release super user privileges.\n");
}
#else
Id_SetRESUid((uid_t) -1, uid, (uid_t) -1); // revert to uid
#endif
}
}
uid_t
Id_BeginSuperUser(void)
{
uid_t uid = Id_GetEUid();
ASSERT_NOT_IMPLEMENTED(uid != (uid_t) -1);
if (uid == 0) {
uid = (uid_t) -1; // already root; nothing to do
} else {
#if defined(__APPLE__)
syscall(SYS_settid, KAUTH_UID_NONE, KAUTH_GID_NONE /* Ignored. */);
#else
Id_SetRESUid((uid_t) -1, (uid_t) 0, (uid_t) -1); // effectively root
#endif
}
return uid;
}
Bool
ProcMgr_GetImpersonatedUserInfo(char **userName, // OUT
char **homeDir) // OUT
{
char buffer[BUFSIZ];
struct passwd pw;
struct passwd *ppw;
*userName = NULL;
*homeDir = NULL;
ppw = &pw;
if ((ppw = getpwuid_r(Id_GetEUid(), &pw, buffer, sizeof buffer)) == NULL) {
return FALSE;
}
*userName = Unicode_Alloc(ppw->pw_name, STRING_ENCODING_DEFAULT);
*homeDir = Unicode_Alloc(ppw->pw_dir, STRING_ENCODING_DEFAULT);
return TRUE;
}
uid_t
Id_BeginSuperUser(void)
{
uid_t uid = Id_GetEUid();
VERIFY(uid != (uid_t) -1);
if (uid == 0) {
uid = (uid_t) -1; // already root; nothing to do
} else {
#if defined(__APPLE__)
#if TARGET_OS_IPHONE
Warning("XXXIOS: implement %s\n", __func__);
#else
syscall(SYS_settid, KAUTH_UID_NONE, KAUTH_GID_NONE /* Ignored. */);
#endif
#else
Id_SetRESUid((uid_t) -1, (uid_t) 0, (uid_t) -1); // effectively root
#endif
}
return uid;
}
