source3/modules/vfs_aixacl.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    VFS module to get and set posix acls
   4    Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2006
   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 "system/filesys.h"
  22 #include "smbd/smbd.h"
  23 #include "vfs_aixacl_util.h"
  24
  25 SMB_ACL_T aixacl_sys_acl_get_file(vfs_handle_struct *handle,
  26                                   const struct smb_filename *smb_fname,
  27                                   SMB_ACL_TYPE_T type,
  28                                   TALLOC_CTX *mem_ctx)
  29 {
  30         const char *path_p = smb_fname->base_name;
  31         struct acl *file_acl = (struct acl *)NULL;
  32         struct smb_acl_t *result = (struct smb_acl_t *)NULL;
  33
  34         int rc = 0;
  35         uid_t user_id;
  36
  37         /* AIX has no DEFAULT */
  38         if  ( type == SMB_ACL_TYPE_DEFAULT )
  39                 return NULL;
  40
  41         /* Get the acl using statacl */
  42
  43         DEBUG(10,("Entering AIX sys_acl_get_file\n"));
  44         DEBUG(10,("path_p is %s\n",path_p));
  45
  46         file_acl = (struct acl *)SMB_MALLOC(BUFSIZ);
  47
  48         if(file_acl == NULL) {
  49                 errno=ENOMEM;
  50                 DEBUG(0,("Error in AIX sys_acl_get_file: %d\n",errno));
  51                 return(NULL);
  52         }
  53
  54         memset(file_acl,0,BUFSIZ);
  55
  56         rc = statacl((char *)path_p,0,file_acl,BUFSIZ);
  57         if( (rc == -1) && (errno == ENOSPC)) {
  58                 struct acl *new_acl = SMB_MALLOC(file_acl->acl_len + sizeof(struct acl));
  59                 if( new_acl == NULL) {
  60                         SAFE_FREE(file_acl);
  61                         errno = ENOMEM;
  62                         return NULL;
  63                 }
  64                 file_acl = new_acl;
  65                 rc = statacl((char *)path_p,0,file_acl,file_acl->acl_len+sizeof(struct acl));
  66                 if( rc == -1) {
  67                         DEBUG(0,("statacl returned %d with errno %d\n",rc,errno));
  68                         SAFE_FREE(file_acl);
  69                         return(NULL);
  70                 }
  71         }
  72
  73         DEBUG(10,("Got facl and returned it\n"));
  74
  75
  76         result = aixacl_to_smbacl(file_acl, mem_ctx);
  77         SAFE_FREE(file_acl);
  78         return result;
  79
  80         /*errno = ENOTSUP;
  81         return NULL;*/
  82 }
  83
  84 SMB_ACL_T aixacl_sys_acl_get_fd(vfs_handle_struct *handle,
  85                                 files_struct *fsp,
  86                                 TALLOC_CTX *mem_ctx)
  87 {
  88
  89         struct acl *file_acl = (struct acl *)NULL;
  90         struct smb_acl_t *result = (struct smb_acl_t *)NULL;
  91
  92         int rc = 0;
  93         uid_t user_id;
  94
  95         /* Get the acl using fstatacl */
  96
  97         DEBUG(10,("Entering AIX sys_acl_get_fd\n"));
  98         DEBUG(10,("fd is %d\n",fsp->fh->fd));
  99         file_acl = (struct acl *)SMB_MALLOC(BUFSIZ);
 100
 101         if(file_acl == NULL) {
 102                 errno=ENOMEM;
 103                 DEBUG(0,("Error in AIX sys_acl_get_fd is %d\n",errno));
 104                 return(NULL);
 105         }
 106
 107         memset(file_acl,0,BUFSIZ);
 108
 109         rc = fstatacl(fsp->fh->fd,0,file_acl,BUFSIZ);
 110         if( (rc == -1) && (errno == ENOSPC)) {
 111                 struct acl *new_acl = SMB_MALLOC(file_acl->acl_len + sizeof(struct acl));
 112                 if( new_acl == NULL) {
 113                         SAFE_FREE(file_acl);
 114                         errno = ENOMEM;
 115                         return NULL;
 116                 }
 117                 file_acl = new_acl;
 118                 rc = fstatacl(fsp->fh->fd,0,file_acl,file_acl->acl_len + sizeof(struct acl));
 119                 if( rc == -1) {
 120                         DEBUG(0,("fstatacl returned %d with errno %d\n",rc,errno));
 121                         SAFE_FREE(file_acl);
 122                         return(NULL);
 123                 }
 124         }
 125
 126         DEBUG(10,("Got facl and returned it\n"));
 127
 128         result = aixacl_to_smbacl(file_acl, mem_ctx);
 129         SAFE_FREE(file_acl);
 130         return result;
 131
 132         /*errno = ENOTSUP;
 133         return NULL;*/
 134 }
 135
 136 int aixacl_sys_acl_set_file(vfs_handle_struct *handle,
 137                         const struct smb_filename *smb_fname,
 138                         SMB_ACL_TYPE_T type,
 139                         SMB_ACL_T theacl)
 140 {
 141         struct acl *file_acl = NULL;
 142         unsigned int rc;
 143
 144         file_acl = aixacl_smb_to_aixacl(type, theacl);
 145         if (!file_acl)
 146                 return -1;
 147
 148         rc = chacl((char *)smb_fname->base_name,file_acl,file_acl->acl_len);
 149         DEBUG(10,("errno is %d\n",errno));
 150         DEBUG(10,("return code is %d\n",rc));
 151         SAFE_FREE(file_acl);
 152         DEBUG(10,("Exiting the aixacl_sys_acl_set_file\n"));
 153
 154         return rc;
 155 }
 156
 157 int aixacl_sys_acl_set_fd(vfs_handle_struct *handle,
 158                             files_struct *fsp,
 159                             SMB_ACL_T theacl)
 160 {
 161         struct acl *file_acl = NULL;
 162         unsigned int rc;
 163
 164         file_acl = aixacl_smb_to_aixacl(SMB_ACL_TYPE_ACCESS, theacl);
 165         if (!file_acl)
 166                 return -1;
 167
 168         rc = fchacl(fsp->fh->fd,file_acl,file_acl->acl_len);
 169         DEBUG(10,("errno is %d\n",errno));
 170         DEBUG(10,("return code is %d\n",rc));
 171         SAFE_FREE(file_acl);
 172         DEBUG(10,("Exiting aixacl_sys_acl_set_fd\n"));
 173
 174         return rc;
 175 }
 176
 177 int aixacl_sys_acl_delete_def_file(vfs_handle_struct *handle,
 178                                 const struct smb_filename *smb_fname)
 179 {
 180         return 0; /* otherwise you can't set acl at upper level */
 181 }
 182
 183 static struct vfs_fn_pointers vfs_aixacl_fns = {
 184         .sys_acl_get_file_fn = aixacl_sys_acl_get_file,
 185         .sys_acl_get_fd_fn = aixacl_sys_acl_get_fd,
 186         .sys_acl_blob_get_file_fn = posix_sys_acl_blob_get_file,
 187         .sys_acl_blob_get_fd_fn = posix_sys_acl_blob_get_fd,
 188         .sys_acl_set_file_fn = aixacl_sys_acl_set_file,
 189         .sys_acl_set_fd_fn = aixacl_sys_acl_set_fd,
 190         .sys_acl_delete_def_file_fn = aixacl_sys_acl_delete_def_file,
 191 };
 192
 193 static_decl_vfs;
 194 NTSTATUS vfs_aixacl_init(TALLOC_CTX *ctx)
 195 {
 196         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "aixacl",
 197                                 &vfs_aixacl_fns);
 198 }