From 40017b0e7aa236ca1144563dea986a95684f1599 Mon Sep 17 00:00:00 2001 From: Tim Rice Date: Sun, 14 Jul 2002 13:36:49 -0700 Subject: (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 --- openbsd-compat/xmmap.c | 65 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 openbsd-compat/xmmap.c (limited to 'openbsd-compat/xmmap.c') 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 +#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 */ + +} + -- cgit v1.2.3