[Libvirt-cim] [PATCH] Redirect stdout & stderr when run as out-of-process provider

# HG changeset patch # User Chip Vincent <cvincent(a)us.ibm.com&gt; # Date 1316557881 14400 # Node ID 4d95f2e9f2d8eac1565307def96bd158f5dcf160 # Parent db809376d763493849c2a19f587969eaec619b75 Redirect stdout & stderr when run as out-of-process provider When a provider is loaded in-process by Pegasus, messages sent to stdout and stderr are suppressed. However, when loaded out-of-process, those same messages appear on the console. This happens excessively when libvirt-cim LXC_ and XEN_ classes are enumerated and libvirt sends "libvir: error : no connection driver available for..." messages to stderr. In development, this can sometimes prevent console usage. Until a fix is made to Pegasus, we'll suppress console output during provider initialization when run in out-of-process mode. Signed-off-by: Chip Vincent <cvincent(a)us.ibm.com&gt; diff --git a/libxkutil/misc_util.c b/libxkutil/misc_util.c --- a/libxkutil/misc_util.c +++ b/libxkutil/misc_util.c @@ -29,6 +29,7 @@ #include <stdarg.h> #include <unistd.h> #include <pthread.h> +#include <errno.h> #include <libvirt/libvirt.h> #include <libvirt/virterror.h> @@ -540,6 +541,17 @@ { int ret = 0; + /* The tog-pegasus out-of-process provider feature does not + * redirect stdout and stderr, so it's done here to prevent + * any messages from taking over the console. One example is + * verbose connection failures sent to stdout by libvirt. */ + if (strstr(program_invocation_short_name, "cimprovagt") != NULL) { + CU_DEBUG("Redirecting stdout and stderr"); + + stdout = freopen("/dev/null", "a", stdout); + stderr = freopen("/dev/null", "a", stderr); + } + /* double-check lock pattern used for performance reasons */ if (libvirt_initialized == 0) { pthread_mutex_lock(&libvirt_mutex);