1 files changed, 119 insertions, 0 deletions
diff --git a/libdiskfs/node-create.c b/libdiskfs/node-create.c
new file mode 100644
index 00000000..09dc4a5a
--- /dev/null
+++ b/libdiskfs/node-create.c
@@ -0,0 +1,119 @@
+/* Making new files
+   Copyright (C) 1992, 1993, 1994, 1996, 1998 Free Software Foundation
+
+   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, 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 "priv.h"
+
+/* Create a new node. Give it MODE; if that includes IFDIR, also
+   initialize `.' and `..' in the new directory.  Return the node in NPP.
+   CRED identifies the user responsible for the call.  If NAME is nonzero,
+   then link the new node into DIR with name NAME; DS is the result of a
+   prior diskfs_lookup for creation (and DIR has been held locked since).
+   DIR must always be provided as at least a hint for disk allocation
+   strategies.  */
+error_t
+diskfs_create_node (struct node *dir,
+		    const char *name,
+		    mode_t mode,
+		    struct node **newnode,
+		    struct protid *cred,
+		    struct dirstat *ds)
+{
+  struct node *np;
+  error_t err;
+  uid_t newuid;
+  gid_t newgid;
+
+  if (diskfs_check_readonly ())
+    return EROFS;
+
+  /* Make the node */
+  err = diskfs_alloc_node (dir, mode, newnode);
+  if (err)
+    {
+      if (name)
+	diskfs_drop_dirstat (dir, ds);
+      return err;
+    }
+
+  np = *newnode;
+
+  /* Initialize the on-disk fields. */
+  if (cred->user->uids->num)
+    newuid = cred->user->uids->ids[0];
+  else
+    {
+      newuid = dir->dn_stat.st_uid;
+      mode &= ~S_ISUID;
+    }
+  err = diskfs_validate_owner_change (np, newuid);
+  if (err)
+    goto change_err;
+  np->dn_stat.st_uid = newuid;
+  if (np->author_tracks_uid)
+    np->dn_stat.st_author = newuid;
+
+  newgid = dir->dn_stat.st_gid;
+  if (!idvec_contains (cred->user->gids, newgid))
+    mode &= ~S_ISGID;
+  err = diskfs_validate_group_change (np, newgid);
+  if (err)
+    goto change_err;
+  np->dn_stat.st_gid = newgid;
+
+  np->dn_stat.st_rdev = 0;
+  np->dn_stat.st_nlink = !!name;
+  err = diskfs_validate_mode_change (np, mode);
+  if (err)
+    goto change_err;
+  np->dn_stat.st_mode = mode;
+
+  np->dn_stat.st_blocks = 0;
+  np->dn_stat.st_size = 0;
+  np->dn_stat.st_flags = 0;
+  np->dn_set_atime = 1;
+  np->dn_set_mtime = 1;
+  np->dn_set_ctime = 1;
+
+  if (S_ISDIR (mode))
+    err = diskfs_init_dir (np, dir, cred);
+
+  diskfs_node_update (np, 1);
+
+  if (err)
+    {
+    change_err:
+      np->dn_stat.st_mode = 0;
+      np->dn_stat.st_nlink = 0;
+      if (name)
+	diskfs_drop_dirstat (dir, ds);
+      return err;
+    }
+
+  if (name)
+    {
+      err = diskfs_direnter (dir, name, np, ds, cred);
+      if (err)
+	{
+	  if (S_ISDIR (mode))
+	    diskfs_clear_directory (np, dir, cred);
+	  np->dn_stat.st_nlink = 0;
+	  np->dn_set_ctime = 1;
+	  diskfs_nput (np);
+	}
+    }
+  return err;
+}