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-rw-r--r--libtrivfs/startup.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/libtrivfs/startup.c b/libtrivfs/startup.c
index 86b0f827..4d76d47c 100644
--- a/libtrivfs/startup.c
+++ b/libtrivfs/startup.c
@@ -65,5 +65,24 @@ trivfs_startup(mach_port_t bootstrap, int flags,
if (!err && control)
*control = fsys;
+ /* Mark us as important. */
+ if (! err)
+ {
+ mach_port_t proc = getproc ();
+ if (proc == MACH_PORT_NULL)
+ /* /hurd/exec uses libtrivfs. We have no handle to the proc
+ server in /hurd/exec when it does its handshake with the
+ root filesystem, so fail graciously here. */
+ return 0;
+
+ err = proc_mark_important (proc);
+ /* This might fail due to permissions or because the old proc
+ server is still running, ignore any such errors. */
+ if (err == EPERM || err == EMIG_BAD_ID)
+ err = 0;
+
+ mach_port_deallocate (mach_task_self (), proc);
+ }
+
return err;
}