[libvirt] [PATCH] rpc: Retrieve peer PID via new getsockopt() for Mac

While LOCAL_PEERCRED on the BSDs does not return the pid information of the peer, Mac OS X 10.8 added LOCAL_PEERPID to retrieve the pid so we should use that when its available to get that information. --- v3: * Consider EOPNOTSUPP as non-fatal in case they've built on 10.8 but run the binary on 10.6 as that's the error you'll get back in that case. v2: * Make LOCAL_PEERPID call non-fatal in case the user built the binary on a system that supports it but then runs it on a kernel that does not support it --- src/rpc/virnetsocket.c | 26 +++++++++++++++++++++++++- 1 file changed, 25 insertions(+), 1 deletion(-) diff --git a/src/rpc/virnetsocket.c b/src/rpc/virnetsocket.c index b2ebefe..f73bc50 100644 --- a/src/rpc/virnetsocket.c +++ b/src/rpc/virnetsocket.c @@ -1197,12 +1197,36 @@ int virNetSocketGetUNIXIdentity(virNetSocketPtr sock, goto cleanup; } - /* PID and process creation time are not supported on BSDs */ + /* PID and process creation time are not supported on BSDs by + * LOCAL_PEERCRED. + */ *pid = -1; *timestamp = -1; *uid = cr.cr_uid; *gid = cr.cr_gid; +# ifdef LOCAL_PEERPID + /* Exists on Mac OS X 10.8 for retrieving the peer's PID */ + cr_len = sizeof(*pid); + + if (getsockopt(sock->fd, VIR_SOL_PEERCRED, LOCAL_PEERPID, pid, &cr_len) < 0) { + /* Ensure this is set to something sane as there are no guarentees + * as to what its set to now. + */ + *pid = -1; + + /* If this was built on a system with LOCAL_PEERPID defined but + * the kernel doesn't support it we'll get back EOPNOTSUPP so + * treat all errors but EOPNOTSUPP as fatal + */ + if (errno != EOPNOTSUPP) { + virReportSystemError(errno, "%s", + _("Failed to get client socket PID")); + goto cleanup; + } + } +# endif + ret = 0; cleanup: -- 1.8.1.5