Initial import

[samba] / source / smbd / fake_file.c

diff --git a/source/smbd/fake_file.c b/source/smbd/fake_file.c
new file mode 100644 (file)
index 0000000..799725a
--- /dev/null
+++ b/source/smbd/fake_file.c
@@ -0,0 +1,158 @@
+/* 
+   Unix SMB/CIFS implementation.
+   FAKE FILE suppport, for faking up special files windows want access to
+   Copyright (C) Stefan (metze) Metzmacher     2003
+   
+   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 2 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, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+extern struct current_user current_user;
+
+static FAKE_FILE fake_files[] = {
+#ifdef WITH_QUOTAS
+       {FAKE_FILE_NAME_QUOTA_UNIX,     FAKE_FILE_TYPE_QUOTA,   init_quota_handle,      destroy_quota_handle},
+#endif /* WITH_QUOTAS */
+       {NULL,                          FAKE_FILE_TYPE_NONE,    NULL,                   NULL }
+};
+
+/****************************************************************************
+ Create a fake file handle
+****************************************************************************/
+
+static struct _FAKE_FILE_HANDLE *init_fake_file_handle(enum FAKE_FILE_TYPE type)
+{
+       TALLOC_CTX *mem_ctx = NULL;
+       FAKE_FILE_HANDLE *fh = NULL;
+       int i;
+
+       for (i=0;fake_files[i].name!=NULL;i++) {
+               if (fake_files[i].type==type) {
+                       DEBUG(5,("init_fake_file_handle: for [%s]\n",fake_files[i].name));
+
+                       if ((mem_ctx=talloc_init("fake_file_handle"))==NULL) {
+                               DEBUG(0,("talloc_init(fake_file_handle) failed.\n"));
+                               return NULL;    
+                       }
+
+                       if ((fh =TALLOC_ZERO_P(mem_ctx, FAKE_FILE_HANDLE))==NULL) {
+                               DEBUG(0,("talloc_zero() failed.\n"));
+                               talloc_destroy(mem_ctx);
+                               return NULL;
+                       }
+
+                       fh->type = type;
+                       fh->mem_ctx = mem_ctx;
+
+                       if (fake_files[i].init_pd) {
+                               fh->pd = fake_files[i].init_pd(fh->mem_ctx);
+                       }
+
+                       fh->free_pd = fake_files[i].free_pd;
+
+                       return fh;
+               }
+       }
+
+       return NULL;    
+}
+
+/****************************************************************************
+ Does this name match a fake filename ?
+****************************************************************************/
+
+enum FAKE_FILE_TYPE is_fake_file(const char *fname)
+{
+#ifdef HAVE_SYS_QUOTAS
+       int i;
+#endif
+
+       if (!fname) {
+               return FAKE_FILE_TYPE_NONE;
+       }
+
+#ifdef HAVE_SYS_QUOTAS
+       for (i=0;fake_files[i].name!=NULL;i++) {
+               if (strncmp(fname,fake_files[i].name,strlen(fake_files[i].name))==0) {
+                       DEBUG(5,("is_fake_file: [%s] is a fake file\n",fname));
+                       return fake_files[i].type;
+               }
+       }
+#endif
+
+       return FAKE_FILE_TYPE_NONE;
+}
+
+
+/****************************************************************************
+ Open a fake quota file with a share mode.
+****************************************************************************/
+
+files_struct *open_fake_file(connection_struct *conn,
+                               enum FAKE_FILE_TYPE fake_file_type,
+                               const char *fname,
+                               uint32 access_mask)
+{
+       files_struct *fsp = NULL;
+
+       /* access check */
+       if (current_user.uid != 0) {
+               DEBUG(1,("open_fake_file_shared: access_denied to service[%s] file[%s] user[%s]\n",
+                       lp_servicename(SNUM(conn)),fname,conn->user));
+               errno = EACCES;
+               return NULL;
+       }
+
+       fsp = file_new(conn);
+       if(!fsp) {
+               return NULL;
+       }
+
+       DEBUG(5,("open_fake_file_shared: fname = %s, FID = %d, access_mask = 0x%x\n",
+               fname, fsp->fnum, (unsigned int)access_mask));
+
+       fsp->conn = conn;
+       fsp->fh->fd = -1;
+       fsp->vuid = current_user.vuid;
+       fsp->fh->pos = -1;
+       fsp->can_lock = True; /* Should this be true ? */
+       fsp->access_mask = access_mask;
+       string_set(&fsp->fsp_name,fname);
+       
+       fsp->fake_file_handle = init_fake_file_handle(fake_file_type);
+       
+       if (fsp->fake_file_handle==NULL) {
+               file_free(fsp);
+               return NULL;
+       }
+
+       conn->num_files_open++;
+       return fsp;
+}
+
+void destroy_fake_file_handle(FAKE_FILE_HANDLE **fh)
+{
+       if (!fh||!(*fh)) {
+               return;
+       }
+
+       if ((*fh)->free_pd) {
+               (*fh)->free_pd(&(*fh)->pd);             
+       }
+
+       talloc_destroy((*fh)->mem_ctx);
+       (*fh) = NULL;
+}