/**
* virDomainLxcEnterNamespace:
* @domain: a domain object
* @nfdlist: number of FDs in @fdlist
* @fdlist: list of namespace file descriptors
* @noldfdlist: filled with number of old FDs
* @oldfdlist: pointer to hold list of old namespace file descriptors
* @flags: currently unused, pass 0
*
* This API is LXC specific, so it will only work with hypervisor
* connections to the LXC driver.
*
* Attaches the process to the namespaces associated
* with the FDs in @fdlist
*
* If @oldfdlist is non-NULL, it will be populated with file
* descriptors representing the old namespace. This allows
* the caller to switch back to its current namespace later
*
* Returns 0 on success, -1 on error
*/
int
virDomainLxcEnterNamespace(virDomainPtr domain,
unsigned int nfdlist,
int *fdlist,
unsigned int *noldfdlist,
int **oldfdlist,
unsigned int flags)
{
size_t i;
VIR_DOMAIN_DEBUG(domain, "nfdlist=%d, fdlist=%p, "
"noldfdlist=%p, oldfdlist=%p, flags=%x",
nfdlist, fdlist, noldfdlist, oldfdlist, flags);
virResetLastError();
virCheckFlagsGoto(0, error);
if (noldfdlist && oldfdlist) {
size_t nfds;
if (virProcessGetNamespaces(getpid(),
&nfds,
oldfdlist) < 0)
goto error;
*noldfdlist = nfds;
}
if (virProcessSetNamespaces(nfdlist, fdlist) < 0) {
if (oldfdlist && noldfdlist) {
for (i = 0; i < *noldfdlist; i++)
VIR_FORCE_CLOSE((*oldfdlist)[i]);
VIR_FREE(*oldfdlist);
*noldfdlist = 0;
}
goto error;
}
return 0;
error:
virDispatchError(domain->conn);
return -1;
}
/**
* virDomainLxcEnterNamespace:
* @domain: a domain object
* @nfdlist: number of FDs in @fdlist
* @fdlist: list of namespace file descriptors
* @noldfdlist: filled with number of old FDs
* @oldfdlist: pointer to hold list of old namespace file descriptors
* @flags: currently unused, pass 0
*
* This API is LXC specific, so it will only work with hypervisor
* connections to the LXC driver.
*
* Attaches the process to the namespaces associated
* with the FDs in @fdlist
*
* If @oldfdlist is non-NULL, it will be populated with file
* descriptors representing the old namespace. This allows
* the caller to switch back to its current namespace later
*
* Returns 0 on success, -1 on error
*/
int
virDomainLxcEnterNamespace(virDomainPtr domain,
unsigned int nfdlist,
int *fdlist,
unsigned int *noldfdlist,
int **oldfdlist,
unsigned int flags)
{
int i;
virCheckFlagsGoto(0, error);
if (noldfdlist && oldfdlist) {
size_t nfds;
if (virProcessGetNamespaces(getpid(),
&nfds,
oldfdlist) < 0)
goto error;
*noldfdlist = nfds;
}
if (virProcessSetNamespaces(nfdlist, fdlist) < 0) {
if (oldfdlist && noldfdlist) {
for (i = 0 ; i < *noldfdlist ; i++) {
VIR_FORCE_CLOSE((*oldfdlist)[i]);
}
VIR_FREE(*oldfdlist);
*noldfdlist = 0;
}
goto error;
}
return 0;
error:
virDispatchError(domain->conn);
return -1;
}
