Remove portability support for mmap

We no longer need to wrap/replace mmap for portability now that
pre-auth compression has been removed from OpenSSH.

README.privsep

@@ -8,10 +8,6 @@ More information is available at:
 Privilege separation is now enabled by default; see the
 UsePrivilegeSeparation option in sshd_config(5).
 
-On systems which lack mmap or anonymous (MAP_ANON) memory mapping,
-compression must be disabled in order for privilege separation to
-function.
-
 When privsep is enabled, during the pre-authentication phase sshd will
 chroot(2) to "/var/empty" and change its privileges to the "sshd" user
 and its primary group.  sshd is a pseudo-account that should not be
@@ -35,9 +31,6 @@ privsep user and chroot directory:
   --with-privsep-path=xxx Path for privilege separation chroot
   --with-privsep-user=user Specify non-privileged user for privilege separation
 
-Privsep requires operating system support for file descriptor passing.
-Compression will be disabled on systems without a working mmap MAP_ANON.
-
 PAM-enabled OpenSSH is known to function with privsep on AIX, FreeBSD, 
 HP-UX (including Trusted Mode), Linux, NetBSD and Solaris.
 

TODO

@@ -69,10 +69,6 @@ Packaging:
   ([email protected])
 
 PrivSep Issues:
-- mmap() issues.
-  + /dev/zero solution (Solaris)
-  + No/broken MAP_ANON (Irix)
-  + broken /dev/zero parse (Linux)
 - PAM
   + See above PAM notes
 - AIX

configure.ac

@@ -1137,7 +1137,6 @@ mips-sony-bsd|mips-sony-newsos4)
 
 *-*-ultrix*)
 	AC_DEFINE([BROKEN_GETGROUPS], [1], [getgroups(0,NULL) will return -1])
-	AC_DEFINE([BROKEN_MMAP], [1], [Ultrix mmap can't map files])
 	AC_DEFINE([NEED_SETPGRP])
 	AC_DEFINE([HAVE_SYS_SYSLOG_H], [1], [Force use of sys/syslog.h on Ultrix])
 	;;
@@ -1708,7 +1707,6 @@ AC_CHECK_FUNCS([ \
 	memmove \
 	memset_s \
 	mkdtemp \
-	mmap \
 	ngetaddrinfo \
 	nsleep \
 	ogetaddrinfo \

openbsd-compat/Makefile.in

@@ -18,7 +18,7 @@ LDFLAGS=-L. @LDFLAGS@
 
 OPENBSD=base64.o basename.o bcrypt_pbkdf.o bindresvport.o blowfish.o daemon.o dirname.o fmt_scaled.o getcwd.o getgrouplist.o getopt_long.o getrrsetbyname.o glob.o inet_aton.o inet_ntoa.o inet_ntop.o mktemp.o pwcache.o readpassphrase.o reallocarray.o realpath.o rresvport.o setenv.o setproctitle.o sha1.o sha2.o rmd160.o md5.o sigact.o strlcat.o strlcpy.o strmode.o strnlen.o strptime.o strsep.o strtonum.o strtoll.o strtoul.o strtoull.o timingsafe_bcmp.o vis.o blowfish.o bcrypt_pbkdf.o explicit_bzero.o
 
-COMPAT=arc4random.o bsd-asprintf.o bsd-closefrom.o bsd-cray.o bsd-cygwin_util.o bsd-getpeereid.o getrrsetbyname-ldns.o bsd-err.o bsd-misc.o bsd-nextstep.o bsd-openpty.o bsd-poll.o bsd-setres_id.o bsd-snprintf.o bsd-statvfs.o bsd-waitpid.o fake-rfc2553.o openssl-compat.o xmmap.o xcrypt.o kludge-fd_set.o
+COMPAT=arc4random.o bsd-asprintf.o bsd-closefrom.o bsd-cray.o bsd-cygwin_util.o bsd-getpeereid.o getrrsetbyname-ldns.o bsd-err.o bsd-misc.o bsd-nextstep.o bsd-openpty.o bsd-poll.o bsd-setres_id.o bsd-snprintf.o bsd-statvfs.o bsd-waitpid.o fake-rfc2553.o openssl-compat.o xcrypt.o kludge-fd_set.o
 
 PORTS=port-aix.o port-irix.o port-linux.o port-solaris.o port-tun.o port-uw.o
 

openbsd-compat/openbsd-compat.h

@@ -297,7 +297,6 @@ int	bcrypt_pbkdf(const char *, size_t, const u_int8_t *, size_t,
 void explicit_bzero(void *p, size_t n);
 #endif
 
-void *xmmap(size_t size);
 char *xcrypt(const char *password, const char *salt);
 char *shadow_pw(struct passwd *pw);