diff options
author | Tim Rice <tim@multitalents.net> | 2002-07-14 13:36:49 -0700 |
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committer | Tim Rice <tim@multitalents.net> | 2002-07-14 13:36:49 -0700 |
commit | 40017b0e7aa236ca1144563dea986a95684f1599 (patch) | |
tree | aa62ff2bf0033c2c833724036d732f7ecdd287a8 /openbsd-compat/xmmap.c | |
parent | 952101952f204e5a85698a01469612d6518fc99a (diff) |
(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
Diffstat (limited to 'openbsd-compat/xmmap.c')
-rw-r--r-- | openbsd-compat/xmmap.c | 65 |
1 files changed, 65 insertions, 0 deletions
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 @@ | |||
1 | /* | ||
2 | * Redistribution and use in source and binary forms, with or without | ||
3 | * modification, are permitted provided that the following conditions | ||
4 | * are met: | ||
5 | * 1. Redistributions of source code must retain the above copyright | ||
6 | * notice, this list of conditions and the following disclaimer. | ||
7 | * 2. Redistributions in binary form must reproduce the above copyright | ||
8 | * notice, this list of conditions and the following disclaimer in the | ||
9 | * documentation and/or other materials provided with the distribution. | ||
10 | * | ||
11 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | ||
12 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | ||
13 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | ||
14 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | ||
15 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | ||
16 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | ||
17 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | ||
18 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | ||
19 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | ||
20 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
21 | */ | ||
22 | |||
23 | #include "includes.h" | ||
24 | |||
25 | #ifdef HAVE_SYS_MMAN_H | ||
26 | #include <sys/mman.h> | ||
27 | #endif | ||
28 | |||
29 | void *xmmap(size_t size) | ||
30 | { | ||
31 | void *address; | ||
32 | |||
33 | #ifdef HAVE_MMAP | ||
34 | # ifdef MAP_ANON | ||
35 | address = mmap(NULL, size, PROT_WRITE|PROT_READ, MAP_ANON|MAP_SHARED, | ||
36 | -1, 0); | ||
37 | # else | ||
38 | address = mmap(NULL, size, PROT_WRITE|PROT_READ, MAP_SHARED, | ||
39 | open("/dev/zero", O_RDWR), 0); | ||
40 | # endif | ||
41 | |||
42 | #define MM_SWAP_TEMPLATE "/var/run/sshd.mm.XXXXXXXX" | ||
43 | if (address == MAP_FAILED) { | ||
44 | char tmpname[sizeof(MM_SWAP_TEMPLATE)] = MM_SWAP_TEMPLATE; | ||
45 | int tmpfd; | ||
46 | |||
47 | tmpfd = mkstemp(tmpname); | ||
48 | if (tmpfd == -1) | ||
49 | fatal("mkstemp(\"%s\"): %s", | ||
50 | MM_SWAP_TEMPLATE, strerror(errno)); | ||
51 | unlink(tmpname); | ||
52 | ftruncate(tmpfd, size); | ||
53 | address = mmap(NULL, size, PROT_WRITE|PROT_READ, MAP_SHARED, | ||
54 | tmpfd, 0); | ||
55 | close(tmpfd); | ||
56 | } | ||
57 | |||
58 | return (address); | ||
59 | #else | ||
60 | fatal("%s: UsePrivilegeSeparation=yes and Compression=yes not supported", | ||
61 | __func__); | ||
62 | #endif /* HAVE_MMAP */ | ||
63 | |||
64 | } | ||
65 | |||