1*7c478bd9Sstevel@tonic-gate /*
2*7c478bd9Sstevel@tonic-gate * Redistribution and use in source and binary forms, with or without
3*7c478bd9Sstevel@tonic-gate * modification, are permitted provided that the following conditions
4*7c478bd9Sstevel@tonic-gate * are met:
5*7c478bd9Sstevel@tonic-gate * 1. Redistributions of source code must retain the above copyright
6*7c478bd9Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer.
7*7c478bd9Sstevel@tonic-gate * 2. Redistributions in binary form must reproduce the above copyright
8*7c478bd9Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer in the
9*7c478bd9Sstevel@tonic-gate * documentation and/or other materials provided with the distribution.
10*7c478bd9Sstevel@tonic-gate *
11*7c478bd9Sstevel@tonic-gate * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
12*7c478bd9Sstevel@tonic-gate * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
13*7c478bd9Sstevel@tonic-gate * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
14*7c478bd9Sstevel@tonic-gate * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
15*7c478bd9Sstevel@tonic-gate * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
16*7c478bd9Sstevel@tonic-gate * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
17*7c478bd9Sstevel@tonic-gate * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
18*7c478bd9Sstevel@tonic-gate * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
19*7c478bd9Sstevel@tonic-gate * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
20*7c478bd9Sstevel@tonic-gate * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
21*7c478bd9Sstevel@tonic-gate */
22*7c478bd9Sstevel@tonic-gate
23*7c478bd9Sstevel@tonic-gate #include "includes.h"
24*7c478bd9Sstevel@tonic-gate
25*7c478bd9Sstevel@tonic-gate #ifdef HAVE_SYS_MMAN_H
26*7c478bd9Sstevel@tonic-gate #include <sys/mman.h>
27*7c478bd9Sstevel@tonic-gate #endif
28*7c478bd9Sstevel@tonic-gate
29*7c478bd9Sstevel@tonic-gate #include "log.h"
30*7c478bd9Sstevel@tonic-gate
xmmap(size_t size)31*7c478bd9Sstevel@tonic-gate void *xmmap(size_t size)
32*7c478bd9Sstevel@tonic-gate {
33*7c478bd9Sstevel@tonic-gate void *address;
34*7c478bd9Sstevel@tonic-gate
35*7c478bd9Sstevel@tonic-gate #ifdef HAVE_MMAP
36*7c478bd9Sstevel@tonic-gate # ifdef MAP_ANON
37*7c478bd9Sstevel@tonic-gate address = mmap(NULL, size, PROT_WRITE|PROT_READ, MAP_ANON|MAP_SHARED,
38*7c478bd9Sstevel@tonic-gate -1, 0);
39*7c478bd9Sstevel@tonic-gate # else
40*7c478bd9Sstevel@tonic-gate address = mmap(NULL, size, PROT_WRITE|PROT_READ, MAP_SHARED,
41*7c478bd9Sstevel@tonic-gate open("/dev/zero", O_RDWR), 0);
42*7c478bd9Sstevel@tonic-gate # endif
43*7c478bd9Sstevel@tonic-gate
44*7c478bd9Sstevel@tonic-gate #define MM_SWAP_TEMPLATE "/var/run/sshd.mm.XXXXXXXX"
45*7c478bd9Sstevel@tonic-gate if (address == MAP_FAILED) {
46*7c478bd9Sstevel@tonic-gate char tmpname[sizeof(MM_SWAP_TEMPLATE)] = MM_SWAP_TEMPLATE;
47*7c478bd9Sstevel@tonic-gate int tmpfd;
48*7c478bd9Sstevel@tonic-gate
49*7c478bd9Sstevel@tonic-gate tmpfd = mkstemp(tmpname);
50*7c478bd9Sstevel@tonic-gate if (tmpfd == -1)
51*7c478bd9Sstevel@tonic-gate fatal("mkstemp(\"%s\"): %s",
52*7c478bd9Sstevel@tonic-gate MM_SWAP_TEMPLATE, strerror(errno));
53*7c478bd9Sstevel@tonic-gate unlink(tmpname);
54*7c478bd9Sstevel@tonic-gate ftruncate(tmpfd, size);
55*7c478bd9Sstevel@tonic-gate address = mmap(NULL, size, PROT_WRITE|PROT_READ, MAP_SHARED,
56*7c478bd9Sstevel@tonic-gate tmpfd, 0);
57*7c478bd9Sstevel@tonic-gate close(tmpfd);
58*7c478bd9Sstevel@tonic-gate }
59*7c478bd9Sstevel@tonic-gate
60*7c478bd9Sstevel@tonic-gate return (address);
61*7c478bd9Sstevel@tonic-gate #else
62*7c478bd9Sstevel@tonic-gate fatal("%s: UsePrivilegeSeparation=yes and Compression=yes not supported",
63*7c478bd9Sstevel@tonic-gate __func__);
64*7c478bd9Sstevel@tonic-gate #endif /* HAVE_MMAP */
65*7c478bd9Sstevel@tonic-gate
66*7c478bd9Sstevel@tonic-gate }
67*7c478bd9Sstevel@tonic-gate
68*7c478bd9Sstevel@tonic-gate
69*7c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
70