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Commit 1f0bd32f authored by Mike Lockwood's avatar Mike Lockwood
Browse files

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: default avatarMike Lockwood <lockwood@android.com>
parent f5cb5b24

init/builtins.c

+20 −3
Original line number Diff line number Diff line
@@ -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++;