X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fshared%2Futil.c;h=5efb9591a60f671ff2b2e1b67948ae05a464202d;hp=ceb88d54c25399eb7330313a75a231a377aba4ac;hb=f7cf3431c7260635d9d2fa0886af05e56261c5df;hpb=99e9ab92f47553337c85f81ca80c3b55415467ad

diff --git a/src/shared/util.c b/src/shared/util.c
index ceb88d54c..5efb9591a 100644
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -6144,3 +6144,21 @@ int parse_mode(const char *s, mode_t *ret) {
         *ret = (mode_t) l;
         return 0;
 }
+
+int mount_move_root(const char *path) {
+        assert(path);
+
+        if (chdir(path) < 0)
+                return -errno;
+
+        if (mount(path, "/", NULL, MS_MOVE, NULL) < 0)
+                return -errno;
+
+        if (chroot(".") < 0)
+                return -errno;
+
+        if (chdir("/") < 0)
+                return -errno;
+
+        return 0;
+}