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am 62a54f3b: am 25b15be9: init: use tmpfs/ftruncate for properties backing store instead of ashmem 

Merge commit '62a54f3b1343043528b7e93c1a4311a5e9d5f358'

* commit '62a54f3b1343043528b7e93c1a4311a5e9d5f358':
  init: use tmpfs/ftruncate for properties backing store instead of ashmem
This commit is contained in:
Brian Swetland 2010-07-13 17:18:42 -07:00 committed by Android Git Automerger
parent 587c286f98 62a54f3b13
commit 335cc39928
1 changed files with 15 additions and 6 deletions
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21
init/property_service.c
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@ -27,7 +27,6 @@
#include <cutils/misc.h>
#include <cutils/sockets.h>
#include <cutils/ashmem.h>
#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
#include <sys/_system_properties.h>
@ -110,21 +109,31 @@ static int init_workspace(workspace *w, size_t size)
void *data;
int fd;
fd = ashmem_create_region("system_properties", size);
if(fd < 0)
/* dev is a tmpfs that we can use to carve a shared workspace
* out of, so let's do that...
*/
fd = open("/dev/__properties__", O_RDWR | O_CREAT, 0600);
if (fd < 0)
return -1;
if (ftruncate(fd, size) < 0)
goto out;
data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if(data == MAP_FAILED)
goto out;
/* allow the wolves we share with to do nothing but read */
ashmem_set_prot_region(fd, PROT_READ);
close(fd);
fd = open("/dev/__properties__", O_RDONLY);
if (fd < 0)
return -1;
unlink("/dev/__properties__");
w->data = data;
w->size = size;
w->fd = fd;
return 0;
out: