source3/torture/test_posix_append.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    reproducer for bug 6898
   4    Copyright (C) Volker Lendecke 2009
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21 #include "torture/proto.h"
  22
  23 /*
  24  * Make sure that GENERIC_WRITE does not trigger append. See
  25  * https://bugzilla.samba.org/show_bug.cgi?id=6898
  26  */
  27
  28 bool run_posix_append(int dummy)
  29 {
  30         struct cli_state *cli;
  31         const char *fname = "append";
  32         NTSTATUS status;
  33         uint16_t fnum;
  34         ssize_t written;
  35         SMB_OFF_T size;
  36         char c = '\0';
  37         bool ret = false;
  38
  39         printf("Starting POSIX_APPEND\n");
  40
  41         if (!torture_open_connection(&cli, 0)) {
  42                 return false;
  43         }
  44
  45         status = torture_setup_unix_extensions(cli);
  46         if (!NT_STATUS_IS_OK(status)) {
  47                 printf("torture_setup_unix_extensions failed: %s\n",
  48                        nt_errstr(status));
  49                 goto fail;
  50         }
  51
  52         status = cli_ntcreate(
  53                 cli, fname, 0,
  54                 GENERIC_WRITE_ACCESS|GENERIC_READ_ACCESS|DELETE_ACCESS,
  55                 FILE_ATTRIBUTE_NORMAL|FILE_FLAG_POSIX_SEMANTICS,
  56                 FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE,
  57                 FILE_OVERWRITE_IF,
  58                 FILE_NON_DIRECTORY_FILE|FILE_DELETE_ON_CLOSE,
  59                 0, &fnum);
  60
  61         if (!NT_STATUS_IS_OK(status)) {
  62                 printf("cli_ntcreate failed: %s\n", nt_errstr(status));
  63                 goto fail;
  64         }
  65
  66         /*
  67          * Write two bytes at offset 0. With bug 6898 we would end up
  68          * with a file of 2 byte length.
  69          */
  70
  71         written = cli_write(cli, fnum, 0, &c, 0, sizeof(c));
  72         if (written != sizeof(c)) {
  73                 printf("cli_write failed\n");
  74                 goto fail;
  75         }
  76         written = cli_write(cli, fnum, 0, &c, 0, sizeof(c));
  77         if (written != sizeof(c)) {
  78                 printf("cli_write failed\n");
  79                 goto fail;
  80         }
  81
  82         status = cli_getattrE(cli, fnum, NULL, &size, NULL, NULL, NULL);
  83         if (!NT_STATUS_IS_OK(status)) {
  84                 printf("cli_getatrE failed: %s\n", nt_errstr(status));
  85                 goto fail;
  86         }
  87
  88         if (size != sizeof(c)) {
  89                 printf("BUG: Writing with O_APPEND!!\n");
  90                 goto fail;
  91         }
  92
  93         ret = true;
  94 fail:
  95         torture_close_connection(cli);
  96         return ret;
  97 }