source: branches/samba-3.5.x/source4/utils/getntacl.c

/* 
   Unix SMB/CIFS implementation.

   Get NT ACLs from UNIX files.

   Copyright (C) Tim Potter <tpot@samba.org> 2005
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "includes.h"
#include "system/filesys.h"
#include "librpc/gen_ndr/ndr_xattr.h"
#include "../lib/util/wrap_xattr.h"
#include "param/param.h"

static void ntacl_print_debug_helper(struct ndr_print *ndr, const char *format, ...) PRINTF_ATTRIBUTE(2,3);

static void ntacl_print_debug_helper(struct ndr_print *ndr, const char *format, ...)
{
        va_list ap;
        char *s = NULL;
        int i;

        va_start(ap, format);
        vasprintf(&s, format, ap);
        va_end(ap);

        for (i=0;i<ndr->depth;i++) {
                printf("    ");
        }

        printf("%s\n", s);
        free(s);
}

static NTSTATUS get_ntacl(TALLOC_CTX *mem_ctx,
                          char *filename,
                          struct xattr_NTACL **ntacl, 
                          ssize_t *ntacl_len)
{
        DATA_BLOB blob;
        ssize_t size;
        enum ndr_err_code ndr_err;
        struct ndr_pull *ndr;

        *ntacl = talloc(mem_ctx, struct xattr_NTACL);

        size = wrap_getxattr(filename, XATTR_NTACL_NAME, NULL, 0);

        if (size < 0) {
                fprintf(stderr, "get_ntacl: %s\n", strerror(errno));
                return NT_STATUS_INTERNAL_ERROR;
        }

        blob.data = talloc_array(*ntacl, uint8_t, size);
        size = wrap_getxattr(filename, XATTR_NTACL_NAME, blob.data, size);
        if (size < 0) {
                fprintf(stderr, "get_ntacl: %s\n", strerror(errno));
                return NT_STATUS_INTERNAL_ERROR;
        }
        blob.length = size;

        ndr = ndr_pull_init_blob(&blob, NULL, NULL);

        ndr_err = ndr_pull_xattr_NTACL(ndr, NDR_SCALARS|NDR_BUFFERS, *ntacl);
        if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
                return ndr_map_error2ntstatus(ndr_err);
        }

        return NT_STATUS_OK;
}

static void print_ntacl(TALLOC_CTX *mem_ctx,
                        const char *fname,
                        struct xattr_NTACL *ntacl)
{
        struct ndr_print *pr;

        pr = talloc_zero(mem_ctx, struct ndr_print);
        if (!pr) return;
        pr->print = ntacl_print_debug_helper;

        ndr_print_xattr_NTACL(pr, fname, ntacl);
        talloc_free(pr);
}

int main(int argc, char *argv[])
{
        NTSTATUS status;
        struct xattr_NTACL *ntacl;
        ssize_t ntacl_len;

        if (argc != 2) {
                fprintf(stderr, "Usage: getntacl FILENAME\n");
                return 1;
        }

        status = get_ntacl(NULL, argv[1], &ntacl, &ntacl_len);
        if (!NT_STATUS_IS_OK(status)) {
                fprintf(stderr, "get_ntacl failed: %s\n", nt_errstr(status));
                return 1;
        }

        print_ntacl(ntacl, argv[1], ntacl);

        talloc_free(ntacl);

        return 0;
}