X-Git-Url: http://git.annexia.org/?p=libguestfs.git;a=blobdiff_plain;f=daemon%2Fdaemon.h;h=fa896e17f044487c3e2b17f33ca9b78bc0044c5c;hp=a328435d49fcbfff3ac408d1c93a78c141aa731a;hb=99bd425a0a8fb02c27e0c22b32dafa804773a7b1;hpb=f5d2602bf6d40ecc71a5a17e0be9f480e9a4453a

diff --git a/daemon/daemon.h b/daemon/daemon.h
index a328435..fa896e1 100644
--- a/daemon/daemon.h
+++ b/daemon/daemon.h
@@ -26,11 +26,15 @@
 /* in guestfsd.c */
 extern void xwrite (int sock, const void *buf, size_t len);
 extern void xread (int sock, void *buf, size_t len);
+extern int command (char **stdoutput, char **stderror, const char *name, ...);
 
 /* in proto.c */
 extern int proc_nr;
 extern int serial;
 
+/* in mount.c */
+extern int root_mounted;
+
 /* in stubs.c (auto-generated) */
 extern void dispatch_incoming_message (XDR *);
 
@@ -40,4 +44,22 @@ extern void reply_with_error (const char *fs, ...);
 extern void reply_with_perror (const char *fs, ...);
 extern void reply (xdrproc_t xdrp, char *ret);
 
+#define NEED_ROOT							\
+  do {									\
+    if (!root_mounted) {						\
+      reply_with_error ("%s: you must call 'mount' first to mount the root filesystem", __func__); \
+      return -1;							\
+    }									\
+  }									\
+  while (0)
+
+/* NB:
+ * (1) You must match CHROOT_IN and CHROOT_OUT even along error paths.
+ * (2) You must not change directory!  cwd must always be "/", otherwise
+ *     we can't escape our own chroot.
+ * (3) All paths specified must be absolute.
+ */
+#define CHROOT_IN chroot ("/sysroot");
+#define CHROOT_OUT chroot (".");
+
 #endif /* GUESTFSD_DAEMON_H */