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platform_system_core
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init: Add support for assigning system properties to system properties in init.rc 

For example:
    setprop sys.usb.config $persist.sys.usb.config

Change-Id: I7b4e1ed1335906b32621bd96a341b0f94bbee7f5
Signed-off-by: Mike Lockwood <lockwood@android.com>
This commit is contained in:
Mike Lockwood 2011-06-08 17:31:27 -07:00
parent f5cb5b2435
commit 1f0bd32f90
1 changed files with 20 additions and 3 deletions
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23
init/builtins.c
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@ -440,7 +440,24 @@ int do_setkey(int nargs, char **args)
int do_setprop(int nargs, char **args)
{
property_set(args[1], args[2]);
const char *name = args[1];
const char *value = args[2];
if (value[0] == '$') {
/* Use the value of a system property if value starts with '$' */
value++;
if (value[0] != '$') {
value = property_get(value);
if (!value) {
ERROR("property %s has no value for assigning to %s\n", value, name);
return -EINVAL;
}
} /* else fall through to support double '$' prefix for setting properties
* to string literals that start with '$'
*/
}
property_set(name, value);
return 0;
}
@ -522,8 +539,8 @@ int do_sysclktz(int nargs, char **args)
int do_write(int nargs, char **args)
{
char *path = args[1];
char *value = args[2];
const char *path = args[1];
const char *value = args[2];
if (value[0] == '$') {
/* Write the value of a system property if value starts with '$' */
value++;