(bal/tim) [acconfig.h configure.ac monitor_mm.c servconf.c

  openbsd-compat/Makefile.in] support compression on platforms that
  have no/broken MAP_ANON. Moved code to openbsd-compat/xmmap.c
  Based on patch from nalin@redhat.com of code extracted from Owl's package

2 files changed, 67 insertions, 2 deletions

diff --git a/openbsd-compat/Makefile.in b/openbsd-compat/Makefile.in
index 3e09cfefe..c365ae18f 100644
--- a/openbsd-compat/Makefile.in
+++ b/openbsd-compat/Makefile.in
@@ -1,4 +1,4 @@
-# $Id: Makefile.in,v 1.21 2002/02/19 20:27:57 mouring Exp $
+# $Id: Makefile.in,v 1.22 2002/07/14 20:36:51 tim Exp $
 
 sysconfdir=@sysconfdir@
 piddir=@piddir@
@@ -18,7 +18,7 @@ LDFLAGS=-L. @LDFLAGS@
 
 OPENBSD=base64.o bindresvport.o daemon.o dirname.o getcwd.o getgrouplist.o getopt.o glob.o inet_aton.o inet_ntoa.o inet_ntop.o mktemp.o readpassphrase.o realpath.o rresvport.o setenv.o setproctitle.o sigact.o strlcat.o strlcpy.o strmode.o strsep.o
 
-COMPAT=bsd-arc4random.o bsd-cray.o bsd-cygwin_util.o bsd-misc.o bsd-nextstep.o bsd-snprintf.o bsd-waitpid.o fake-getaddrinfo.o fake-getnameinfo.o
+COMPAT=bsd-arc4random.o bsd-cray.o bsd-cygwin_util.o bsd-misc.o bsd-nextstep.o bsd-snprintf.o bsd-waitpid.o fake-getaddrinfo.o fake-getnameinfo.o xmmap.o
 
 PORTS=port-irix.o port-aix.o
 
diff --git a/openbsd-compat/xmmap.c b/openbsd-compat/xmmap.c
new file mode 100644
index 000000000..a6b7d3bdf
--- /dev/null
+++ b/openbsd-compat/xmmap.c
@@ -0,0 +1,65 @@
+/*
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "includes.h"
+
+#ifdef HAVE_SYS_MMAN_H
+#include <sys/mman.h>
+#endif
+
+void *xmmap(size_t size)
+{
+	void *address;
+
+#ifdef HAVE_MMAP
+# ifdef MAP_ANON
+	address = mmap(NULL, size, PROT_WRITE|PROT_READ, MAP_ANON|MAP_SHARED,
+	    -1, 0);
+# else
+	address = mmap(NULL, size, PROT_WRITE|PROT_READ, MAP_SHARED,
+	    open("/dev/zero", O_RDWR), 0);
+# endif
+
+#define MM_SWAP_TEMPLATE "/var/run/sshd.mm.XXXXXXXX"
+	if (address == MAP_FAILED) {
+		char tmpname[sizeof(MM_SWAP_TEMPLATE)] = MM_SWAP_TEMPLATE;
+		int tmpfd;
+
+		tmpfd = mkstemp(tmpname);
+		if (tmpfd == -1)
+			fatal("mkstemp(\"%s\"): %s",
+			    MM_SWAP_TEMPLATE, strerror(errno));
+		unlink(tmpname);
+		ftruncate(tmpfd, size);
+		address = mmap(NULL, size, PROT_WRITE|PROT_READ, MAP_SHARED,
+		    tmpfd, 0);
+		close(tmpfd);
+	}
+
+	return (address);
+#else
+	fatal("%s: UsePrivilegeSeparation=yes and Compression=yes not supported",
+	    __func__);
+#endif /* HAVE_MMAP */
+
+}
+