- Implement two new system calls:

	int bindat(int fd, int s, const struct sockaddr *addr, socklen_t addrlen);
	int connectat(int fd, int s, const struct sockaddr *name, socklen_t namelen);

  which allow to bind and connect respectively to a UNIX domain socket with a
  path relative to the directory associated with the given file descriptor 'fd'.

- Add manual pages for the new syscalls.

- Make the new syscalls available for processes in capability mode sandbox.

- Add capability rights CAP_BINDAT and CAP_CONNECTAT that has to be present on
  the directory descriptor for the syscalls to work.

- Update audit(4) to support those two new syscalls and to handle path
  in sockaddr_un structure relative to the given directory descriptor.

- Update procstat(1) to recognize the new capability rights.

- Document the new capability rights in cap_rights_limit(2).

Sponsored by:	The FreeBSD Foundation
Discussed with:	rwatson, jilles, kib, des

1 files changed, 4 insertions, 0 deletions

diff --git a/sys/sys/socketvar.h b/sys/sys/socketvar.h
index 9012f240..77f31df 100644
--- a/sys/sys/socketvar.h
+++ b/sys/sys/socketvar.h
@@ -318,8 +318,12 @@ void	soabort(struct socket *so);
 int	soaccept(struct socket *so, struct sockaddr **nam);
 int	socheckuid(struct socket *so, uid_t uid);
 int	sobind(struct socket *so, struct sockaddr *nam, struct thread *td);
+int	sobindat(int fd, struct socket *so, struct sockaddr *nam,
+	    struct thread *td);
 int	soclose(struct socket *so);
 int	soconnect(struct socket *so, struct sockaddr *nam, struct thread *td);
+int	soconnectat(int fd, struct socket *so, struct sockaddr *nam,
+	    struct thread *td);
 int	soconnect2(struct socket *so1, struct socket *so2);
 int	socow_setup(struct mbuf *m0, struct uio *uio);
 int	socreate(int dom, struct socket **aso, int type, int proto,