El Wed, May 04, 2011 at 08:18:37AM -0700 Dudero ha dit:
> can somebody explain me for what the variable: "prefix" in the
> following struct is used for:
>
> Android-sources/system/init/devices.c
> ...
> struct perms_ {
> char *name;
> mode_t perm;
> unsigned int uid;
> unsigned int gid;
> unsigned short prefix;
> };
> ...
>
> Obviously, it can have the values 0 or 1.
judging from the source code perms->prefix is used to deal with
wildcards in the device path specification. if perms->prefix is 1 the
permissions will be applied to all device nodes whose path begins with
perms->name
see do_device() in builtins.c and get_device_perm_inner() in devices.c
(both in mydroid/system/core/init/)
regards
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Matthias Kaehlcke
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