- 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, 4 deletions

diff --git a/sys/security/audit/audit.h b/sys/security/audit/audit.h
index 733a3c7..dd55875 100644
--- a/sys/security/audit/audit.h
+++ b/sys/security/audit/audit.h
@@ -95,7 +95,7 @@ void	 audit_arg_pid(pid_t pid);
 void	 audit_arg_process(struct proc *p);
 void	 audit_arg_signum(u_int signum);
 void	 audit_arg_socket(int sodomain, int sotype, int soprotocol);
-void	 audit_arg_sockaddr(struct thread *td, struct sockaddr *sa);
+void	 audit_arg_sockaddr(struct thread *td, int dirfd, struct sockaddr *sa);
 void	 audit_arg_auid(uid_t auid);
 void	 audit_arg_auditinfo(struct auditinfo *au_info);
 void	 audit_arg_auditinfo_addr(struct auditinfo_addr *au_info);
@@ -267,9 +267,9 @@ void	 audit_thread_free(struct thread *td);
 		audit_arg_socket((sodomain), (sotype), (soprotocol));	\
 } while (0)
 
-#define	AUDIT_ARG_SOCKADDR(td, sa) do {					\
+#define	AUDIT_ARG_SOCKADDR(td, dirfd, sa) do {				\
 	if (AUDITING_TD(curthread))					\
-		audit_arg_sockaddr((td), (sa));				\
+		audit_arg_sockaddr((td), (dirfd), (sa));		\
 } while (0)
 
 #define	AUDIT_ARG_SUID(suid) do {					\
@@ -365,7 +365,7 @@ void	 audit_thread_free(struct thread *td);
 #define	AUDIT_ARG_SIGNUM(signum)
 #define	AUDIT_ARG_SGID(sgid)
 #define	AUDIT_ARG_SOCKET(sodomain, sotype, soprotocol)
-#define	AUDIT_ARG_SOCKADDR(td, sa)
+#define	AUDIT_ARG_SOCKADDR(td, dirfd, sa)
 #define	AUDIT_ARG_SUID(suid)
 #define	AUDIT_ARG_TEXT(text)
 #define	AUDIT_ARG_UID(uid)