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Unix SMB/Netbios implementation.
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VFS module to get and set posix acls
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Copyright (C) Volker Lendecke 2006
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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/* prototypes for static functions first - for clarity */
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static bool smb_ace_to_internal(acl_entry_t posix_ace,
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struct smb_acl_entry *ace);
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static struct smb_acl_t *smb_acl_to_internal(acl_t acl);
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static int smb_acl_set_mode(acl_entry_t entry, SMB_ACL_PERM_T perm);
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static acl_t smb_acl_to_posix(const struct smb_acl_t *acl);
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/* public functions - the api */
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SMB_ACL_T posixacl_sys_acl_get_file(vfs_handle_struct *handle,
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struct smb_acl_t *result;
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case SMB_ACL_TYPE_ACCESS:
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acl_type = ACL_TYPE_ACCESS;
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case SMB_ACL_TYPE_DEFAULT:
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acl_type = ACL_TYPE_DEFAULT;
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acl = acl_get_file(path_p, acl_type);
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result = smb_acl_to_internal(acl);
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SMB_ACL_T posixacl_sys_acl_get_fd(vfs_handle_struct *handle,
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struct smb_acl_t *result;
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acl_t acl = acl_get_fd(fsp->fh->fd);
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result = smb_acl_to_internal(acl);
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int posixacl_sys_acl_set_file(vfs_handle_struct *handle,
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DEBUG(10, ("Calling acl_set_file: %s, %d\n", name, type));
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case SMB_ACL_TYPE_ACCESS:
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acl_type = ACL_TYPE_ACCESS;
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case SMB_ACL_TYPE_DEFAULT:
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acl_type = ACL_TYPE_DEFAULT;
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if ((acl = smb_acl_to_posix(theacl)) == NULL) {
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res = acl_set_file(name, acl_type, acl);
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DEBUG(10, ("acl_set_file failed: %s\n", strerror(errno)));
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int posixacl_sys_acl_set_fd(vfs_handle_struct *handle,
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acl_t acl = smb_acl_to_posix(theacl);
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res = acl_set_fd(fsp->fh->fd, acl);
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int posixacl_sys_acl_delete_def_file(vfs_handle_struct *handle,
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return acl_delete_def_file(path);
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/* private functions */
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static bool smb_ace_to_internal(acl_entry_t posix_ace,
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struct smb_acl_entry *ace)
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acl_permset_t permset;
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if (acl_get_tag_type(posix_ace, &tag) != 0) {
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DEBUG(0, ("smb_acl_get_tag_type failed\n"));
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ace->a_type = SMB_ACL_USER;
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ace->a_type = SMB_ACL_USER_OBJ;
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ace->a_type = SMB_ACL_GROUP;
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ace->a_type = SMB_ACL_GROUP_OBJ;
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ace->a_type = SMB_ACL_OTHER;
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ace->a_type = SMB_ACL_MASK;
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DEBUG(0, ("unknown tag type %d\n", (unsigned int)tag));
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switch(ace->a_type) {
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uid_t *puid = (uid_t *)acl_get_qualifier(posix_ace);
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DEBUG(0, ("smb_acl_get_qualifier failed\n"));
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case SMB_ACL_GROUP: {
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gid_t *pgid = (uid_t *)acl_get_qualifier(posix_ace);
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DEBUG(0, ("smb_acl_get_qualifier failed\n"));
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if (acl_get_permset(posix_ace, &permset) != 0) {
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DEBUG(0, ("smb_acl_get_mode failed\n"));
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#ifdef HAVE_ACL_GET_PERM_NP
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ace->a_perm |= (acl_get_perm_np(permset, ACL_READ) ? SMB_ACL_READ : 0);
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ace->a_perm |= (acl_get_perm_np(permset, ACL_WRITE) ? SMB_ACL_WRITE : 0);
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ace->a_perm |= (acl_get_perm_np(permset, ACL_EXECUTE) ? SMB_ACL_EXECUTE : 0);
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ace->a_perm |= (acl_get_perm(permset, ACL_READ) ? SMB_ACL_READ : 0);
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ace->a_perm |= (acl_get_perm(permset, ACL_WRITE) ? SMB_ACL_WRITE : 0);
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ace->a_perm |= (acl_get_perm(permset, ACL_EXECUTE) ? SMB_ACL_EXECUTE : 0);
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static struct smb_acl_t *smb_acl_to_internal(acl_t acl)
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struct smb_acl_t *result = SMB_MALLOC_P(struct smb_acl_t);
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int entry_id = ACL_FIRST_ENTRY;
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if (result == NULL) {
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ZERO_STRUCTP(result);
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while (acl_get_entry(acl, entry_id, &e) == 1) {
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entry_id = ACL_NEXT_ENTRY;
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result = (struct smb_acl_t *)SMB_REALLOC(
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result, sizeof(struct smb_acl_t) +
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(sizeof(struct smb_acl_entry) * (result->count+1)));
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if (result == NULL) {
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DEBUG(0, ("SMB_REALLOC failed\n"));
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if (!smb_ace_to_internal(e, &result->acl[result->count])) {
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static int smb_acl_set_mode(acl_entry_t entry, SMB_ACL_PERM_T perm)
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acl_permset_t permset;
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if ((ret = acl_get_permset(entry, &permset)) != 0) {
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if ((ret = acl_clear_perms(permset)) != 0) {
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if ((perm & SMB_ACL_READ) &&
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((ret = acl_add_perm(permset, ACL_READ)) != 0)) {
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if ((perm & SMB_ACL_WRITE) &&
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((ret = acl_add_perm(permset, ACL_WRITE)) != 0)) {
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if ((perm & SMB_ACL_EXECUTE) &&
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((ret = acl_add_perm(permset, ACL_EXECUTE)) != 0)) {
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return acl_set_permset(entry, permset);
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static acl_t smb_acl_to_posix(const struct smb_acl_t *acl)
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result = acl_init(acl->count);
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if (result == NULL) {
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DEBUG(10, ("acl_init failed\n"));
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for (i=0; i<acl->count; i++) {
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const struct smb_acl_entry *entry = &acl->acl[i];
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if (acl_create_entry(&result, &e) != 0) {
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DEBUG(1, ("acl_create_entry failed: %s\n",
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switch (entry->a_type) {
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case SMB_ACL_USER_OBJ:
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case SMB_ACL_GROUP_OBJ:
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DEBUG(1, ("Unknown tag value %d\n", entry->a_type));
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if (acl_set_tag_type(e, tag) != 0) {
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DEBUG(10, ("acl_set_tag_type(%d) failed: %s\n",
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tag, strerror(errno)));
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switch (entry->a_type) {
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if (acl_set_qualifier(e, &entry->uid) != 0) {
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DEBUG(1, ("acl_set_qualifiier failed: %s\n",
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if (acl_set_qualifier(e, &entry->gid) != 0) {
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DEBUG(1, ("acl_set_qualifiier failed: %s\n",
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default: /* Shut up, compiler! :-) */
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if (smb_acl_set_mode(e, entry->a_perm) != 0) {
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if (acl_valid(result) != 0) {
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DEBUG(0, ("smb_acl_to_posix: ACL is invalid for set (%s)\n",
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if (result != NULL) {
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/* VFS operations structure */
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static vfs_op_tuple posixacl_op_tuples[] = {
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/* Disk operations */
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{SMB_VFS_OP(posixacl_sys_acl_get_file),
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SMB_VFS_OP_SYS_ACL_GET_FILE,
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SMB_VFS_LAYER_TRANSPARENT},
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{SMB_VFS_OP(posixacl_sys_acl_get_fd),
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SMB_VFS_OP_SYS_ACL_GET_FD,
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SMB_VFS_LAYER_TRANSPARENT},
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{SMB_VFS_OP(posixacl_sys_acl_set_file),
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SMB_VFS_OP_SYS_ACL_SET_FILE,
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SMB_VFS_LAYER_TRANSPARENT},
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{SMB_VFS_OP(posixacl_sys_acl_set_fd),
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SMB_VFS_OP_SYS_ACL_SET_FD,
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SMB_VFS_LAYER_TRANSPARENT},
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{SMB_VFS_OP(posixacl_sys_acl_delete_def_file),
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SMB_VFS_OP_SYS_ACL_DELETE_DEF_FILE,
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SMB_VFS_LAYER_TRANSPARENT},
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NTSTATUS vfs_posixacl_init(void);
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NTSTATUS vfs_posixacl_init(void)
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return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "posixacl",