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4165b82e | 1 | /* |
1b7342ab | 2 | * Copyright (c) 2002 Tim Rice. All rights reserved. |
3 | * MAP_FAILED code by Solar Designer. | |
4 | * | |
4165b82e | 5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * | |
14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
15 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
16 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
17 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
18 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
19 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
20 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
21 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
22 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
23 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
24 | */ | |
25 | ||
1b7342ab | 26 | /* $Id$ */ |
27 | ||
4165b82e | 28 | #include "includes.h" |
29 | ||
30 | #ifdef HAVE_SYS_MMAN_H | |
31 | #include <sys/mman.h> | |
32 | #endif | |
33 | ||
a93bd14c | 34 | #include "log.h" |
35 | ||
4165b82e | 36 | void *xmmap(size_t size) |
37 | { | |
38 | void *address; | |
39 | ||
40 | #ifdef HAVE_MMAP | |
41 | # ifdef MAP_ANON | |
42 | address = mmap(NULL, size, PROT_WRITE|PROT_READ, MAP_ANON|MAP_SHARED, | |
43 | -1, 0); | |
44 | # else | |
45 | address = mmap(NULL, size, PROT_WRITE|PROT_READ, MAP_SHARED, | |
46 | open("/dev/zero", O_RDWR), 0); | |
47 | # endif | |
48 | ||
49 | #define MM_SWAP_TEMPLATE "/var/run/sshd.mm.XXXXXXXX" | |
50 | if (address == MAP_FAILED) { | |
51 | char tmpname[sizeof(MM_SWAP_TEMPLATE)] = MM_SWAP_TEMPLATE; | |
52 | int tmpfd; | |
53 | ||
54 | tmpfd = mkstemp(tmpname); | |
55 | if (tmpfd == -1) | |
56 | fatal("mkstemp(\"%s\"): %s", | |
57 | MM_SWAP_TEMPLATE, strerror(errno)); | |
58 | unlink(tmpname); | |
59 | ftruncate(tmpfd, size); | |
60 | address = mmap(NULL, size, PROT_WRITE|PROT_READ, MAP_SHARED, | |
61 | tmpfd, 0); | |
62 | close(tmpfd); | |
63 | } | |
64 | ||
65 | return (address); | |
66 | #else | |
67 | fatal("%s: UsePrivilegeSeparation=yes and Compression=yes not supported", | |
68 | __func__); | |
69 | #endif /* HAVE_MMAP */ | |
70 | ||
71 | } | |
72 |