+static int acct_on(char *name)
+{
+ struct file *file;
+ int error;
+
+ /* Difference from BSD - they don't do O_APPEND */
+ file = filp_open(name, O_WRONLY|O_APPEND|O_LARGEFILE, 0);
+ if (IS_ERR(file))
+ return PTR_ERR(file);
+
+ if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
+ filp_close(file, NULL);
+ return -EACCES;
+ }
+
+ if (!file->f_op->write) {
+ filp_close(file, NULL);
+ return -EIO;
+ }
+
+ error = security_acct(file);
+ if (error) {
+ filp_close(file, NULL);
+ return error;
+ }
+
+ spin_lock(&acct_globals.lock);
+ mnt_pin(file->f_vfsmnt);
+ acct_file_reopen(file);
+ spin_unlock(&acct_globals.lock);
+
+ mntput(file->f_vfsmnt); /* it's pinned, now give up active reference */
+
+ return 0;
+}
+