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Re: [Xen-devel] [PATCH] xenstore-stat v2

Ah, I see Ian beat me to it. Looking over your patch, it seems like
your tool will produce something much prettier too.


Patrick


On 30 March 2011 09:04, Patrick Colp <pjcolp@xxxxxxxxx> wrote:
> You can just use:
>
> xenstore-ls -p
>
> You'll get output like this:
>
> tool = ""  . . . . . . . . . . . . . . . . . . . . . . . . .  (n0)
>  xenstored = ""  . . . . . . . . . . . . . . . . . . . . . .  (n0)
> vm = ""  . . . . . . . . . . . . . . . . . . . . . . . . . .  (n0)
>  59809a69-1c6d-48f1-bbbe-ed08e3d69b36 = "" . . . . . . . . .  (n0,r4)
>  uuid = "59809a69-1c6d-48f1-bbbe-ed08e3d69b36"  . . . . . .  (n0,r4)
>  name = "domU"  . . . . . . . . . . . . . . . . . . . . . .  (n0,r4)
>  pool_name = "Pool-0" . . . . . . . . . . . . . . . . . . .  (n0,r4)
>  image = "" . . . . . . . . . . . . . . . . . . . . . . . .  (n0,r4)
>   ostype = "linux"  . . . . . . . . . . . . . . . . . . . .  (n0,r4)
>   kernel = "/boot/vmlinuz-domU" . . . . . . . . . . . . . .  (n0,r4)
>   ramdisk = "/boot/initrd.img-domU" . . . . . . . . . . . .  (n0,r4)
>     .
>     .
>     .
>
>
> Patrick
>
>
> On 30 March 2011 05:23, Frank Pan <frankpzh@xxxxxxxxx> wrote:
>> The entries in xenstore have permission attributes. The
>> attributes can be easily altered by xenstore-chmod, however,
>> I cannot find a easy way to see them.
>>
>> I've modified xenstore_client.c to raise a new utility.
>> The utility checks the permission and makes an easy-look output.
>>
>> Please tell me any suggestions.
>> Thanks.
>>
>> Signed-off-by: Frank Pan <frankpzh@xxxxxxxxx>
>> ---
>>  tools/xenstore/Makefile          |    2 +-
>>  tools/xenstore/xenstore_client.c |   58 
>> ++++++++++++++++++++++++++++++++++++++
>>  2 files changed, 59 insertions(+), 1 deletions(-)
>>
>> diff --git a/tools/xenstore/Makefile b/tools/xenstore/Makefile
>> index 35e68d0..ca57e9c 100644
>> --- a/tools/xenstore/Makefile
>> +++ b/tools/xenstore/Makefile
>> @@ -9,7 +9,7 @@ CFLAGS += -I.
>>  CFLAGS += $(CFLAGS_libxenctrl)
>>
>>  CLIENTS := xenstore-exists xenstore-list xenstore-read xenstore-rm
>> xenstore-chmod
>> -CLIENTS += xenstore-write xenstore-ls xenstore-watch
>> +CLIENTS += xenstore-write xenstore-ls xenstore-watch xenstore-stat
>>
>>  XENSTORED_OBJS = xenstored_core.o xenstored_watch.o
>> xenstored_domain.o xenstored_transaction.o xs_lib.o talloc.o utils.o
>> tdb.o hashtable.o
>>
>> diff --git a/tools/xenstore/xenstore_client.c 
>> b/tools/xenstore/xenstore_client.c
>> index 94b82b9..cd8b4d8 100644
>> --- a/tools/xenstore/xenstore_client.c
>> +++ b/tools/xenstore/xenstore_client.c
>> @@ -37,6 +37,7 @@ enum mode {
>>     MODE_rm,
>>     MODE_write,
>>     MODE_watch,
>> +    MODE_stat,
>>  };
>>
>>  static char *output_buf = NULL;
>> @@ -99,6 +100,9 @@ usage(enum mode mode, int incl_mode, const char *progname)
>>     case MODE_watch:
>>        mstr = incl_mode ? "watch " : "";
>>        errx(1, "Usage: %s %s[-h] [-n NR] key", progname, mstr);
>> +    case MODE_stat:
>> +       mstr = incl_mode ? "stat " : "";
>> +       errx(1, "Usage: %s %s[-h] [-s] key [...]", progname, mstr);
>>     }
>>  }
>>
>> @@ -286,6 +290,52 @@ do_watch(struct xs_handle *xsh, int max_events)
>>     }
>>  }
>>
>> +static const char *
>> +perm_type_str(int perm_type)
>> +{
>> +    switch (perm_type) {
>> +    case XS_PERM_WRITE:
>> +        return "-w";
>> +    case XS_PERM_READ:
>> +        return "r-";
>> +    case XS_PERM_READ|XS_PERM_WRITE:
>> +        return "rw";
>> +    case XS_PERM_NONE:
>> +        return "--";
>> +    default:
>> +        return "uu";
>> +    }
>> +}
>> +
>> +static void
>> +do_stat(struct xs_handle *xsh, xs_transaction_t xth, char *path)
>> +{
>> +    unsigned int i, nperms;
>> +    struct xs_permissions *perms;
>> +
>> +    perms = xs_get_permissions(xsh, xth, path, &nperms);
>> +    if (!perms)
>> +        errx(1, "Unable to get permission on %s\n", path);
>> +
>> +    if (!nperms) {
>> +        free(perms);
>> +        errx(1, "Cannot determine owner of %s\n", path);
>> +    }
>> +
>> +    output("Path:\t\t\t%s\n", path);
>> +    output("Owner:\t\t\t%d\n", perms[0].id);
>> +    output("Default permission:\t%s\n", perm_type_str(perms[0].perms));
>> +    output("Permissions:\t\t");
>> +    for (i = 1; i < nperms; i++) {
>> +        output("%d: %s", perms[i].id,
>> +               perm_type_str(perms[i].perms));
>> +        if (i < nperms - 1)
>> +            output(" ");
>> +    }
>> +    output("\n");
>> +    free(perms);
>> +}
>> +
>>  static int
>>  perform(enum mode mode, int optind, int argc, char **argv, struct
>> xs_handle *xsh,
>>         xs_transaction_t xth, int prefix, int tidy, int upto, int
>> recurse, int nr_watches)
>> @@ -459,6 +509,12 @@ perform(enum mode mode, int optind, int argc,
>> char **argv, struct xs_handle *xsh
>>                     errx(1, "Unable to add watch on %s\n", w);
>>             }
>>             do_watch(xsh, nr_watches);
>> +            break;
>> +        }
>> +        case MODE_stat: {
>> +            do_stat(xsh, xth, argv[optind]);
>> +            optind++;
>> +            break;
>>         }
>>         }
>>     }
>> @@ -486,6 +542,8 @@ static enum mode lookup_mode(const char *m)
>>        return MODE_read;
>>     else if (strcmp(m, "watch") == 0)
>>        return MODE_watch;
>> +    else if (strcmp(m, "stat") == 0)
>> +       return MODE_stat;
>>
>>     errx(1, "unknown mode %s\n", m);
>>     return 0;
>> --
>> 1.7.1
>>
>> --
>> 潘震皓, Frank Pan
>>
>> Computer Science and Technology
>> Tsinghua University
>>
>> _______________________________________________
>> Xen-devel mailing list
>> Xen-devel@xxxxxxxxxxxxxxxxxxx
>> http://lists.xensource.com/xen-devel
>>
>>
>

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