| 4165b82e |
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 | |
andersk / openssh.git / blame