| /* |
| * Copyright (c) 2002 Tim Rice. All rights reserved. |
| * MAP_FAILED code by Solar Designer. |
| * |
| * 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. |
| */ |
| |
| /* $Id: xmmap.c,v 1.8 2006/07/12 12:35:52 dtucker Exp $ */ |
| |
| #include "includes.h" |
| |
| #include <sys/types.h> |
| #ifdef HAVE_SYS_MMAN_H |
| #include <sys/mman.h> |
| #endif |
| #include <sys/stat.h> |
| |
| #include <errno.h> |
| |
| #include "log.h" |
| |
| 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, (off_t)0); |
| # else |
| address = mmap(NULL, size, PROT_WRITE|PROT_READ, MAP_SHARED, |
| open("/dev/zero", O_RDWR), (off_t)0); |
| # endif |
| |
| #define MM_SWAP_TEMPLATE "/var/run/sshd.mm.XXXXXXXX" |
| if (address == (void *)MAP_FAILED) { |
| char tmpname[sizeof(MM_SWAP_TEMPLATE)] = MM_SWAP_TEMPLATE; |
| int tmpfd; |
| mode_t old_umask; |
| |
| old_umask = umask(0177); |
| tmpfd = mkstemp(tmpname); |
| umask(old_umask); |
| 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, (off_t)0); |
| close(tmpfd); |
| } |
| |
| return (address); |
| #else |
| fatal("%s: UsePrivilegeSeparation=yes and Compression=yes not supported", |
| __func__); |
| #endif /* HAVE_MMAP */ |
| |
| } |
| |