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 #include "../libcli/security/security.h"
  23
  24 /*
  25  * Make sure that GENERIC_WRITE does not trigger append. See
  26  * https://bugzilla.samba.org/show_bug.cgi?id=6898
  27  */
  28
  29 bool run_posix_append(int dummy)
  30 {
  31         struct cli_state *cli;
  32         const char *fname = "append";
  33         NTSTATUS status;
  34         uint16_t fnum;
  35         ssize_t written;
  36         SMB_OFF_T size;
  37         char c = '\0';
  38         bool ret = false;
  39
  40         printf("Starting POSIX_APPEND\n");
  41
  42         if (!torture_open_connection(&cli, 0)) {
  43                 return false;
  44         }
  45
  46         status = torture_setup_unix_extensions(cli);
  47         if (!NT_STATUS_IS_OK(status)) {
  48                 printf("torture_setup_unix_extensions failed: %s\n",
  49                        nt_errstr(status));
  50                 goto fail;
  51         }
  52
  53         status = cli_ntcreate(
  54                 cli, fname, 0,
  55                 GENERIC_WRITE_ACCESS|GENERIC_READ_ACCESS|DELETE_ACCESS,
  56                 FILE_ATTRIBUTE_NORMAL|FILE_FLAG_POSIX_SEMANTICS,
  57                 FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE,
  58                 FILE_OVERWRITE_IF,
  59                 FILE_NON_DIRECTORY_FILE|FILE_DELETE_ON_CLOSE,
  60                 0, &fnum);
  61
  62         if (!NT_STATUS_IS_OK(status)) {
  63                 printf("cli_ntcreate failed: %s\n", nt_errstr(status));
  64                 goto fail;
  65         }
  66
  67         /*
  68          * Write two bytes at offset 0. With bug 6898 we would end up
  69          * with a file of 2 byte length.
  70          */
  71
  72         written = cli_write(cli, fnum, 0, &c, 0, sizeof(c));
  73         if (written != sizeof(c)) {
  74                 printf("cli_write failed\n");
  75                 goto fail;
  76         }
  77         written = cli_write(cli, fnum, 0, &c, 0, sizeof(c));
  78         if (written != sizeof(c)) {
  79                 printf("cli_write failed\n");
  80                 goto fail;
  81         }
  82
  83         status = cli_getattrE(cli, fnum, NULL, &size, NULL, NULL, NULL);
  84         if (!NT_STATUS_IS_OK(status)) {
  85                 printf("cli_getatrE failed: %s\n", nt_errstr(status));
  86                 goto fail;
  87         }
  88
  89         if (size != sizeof(c)) {
  90                 printf("BUG: Writing with O_APPEND!!\n");
  91                 goto fail;
  92         }
  93
  94         ret = true;
  95 fail:
  96         torture_close_connection(cli);
  97         return ret;
  98 }