SYSCALL_DEFINE1(close, unsigned int, fd)
{
struct file * filp;
struct files_struct *files = current->files;
struct fdtable *fdt;
int retval;
spin_lock(&files->file_lock);
fdt = files_fdtable(files);
if (fd >= fdt->max_fds) {
pr_debug("[%s] fd %u exceeds max_fds %u (user: %s %d:%d)\n",
__func__, fd, fdt->max_fds,
current->comm, current->tgid, current->pid);
goto out_unlock;
}
filp = fdt->fd[fd];
if (!filp) {
struct fdt_user* user = &fdt->user[fd];
if (unlikely(user->remover && user->remover != current->pid)) {
struct task_struct* task = find_task_by_vpid(user->remover);
pr_warn("[%s] fd %u of %s %d:%d is"
" already closed by thread %d (%s %d:%d)\n",
__func__, fd,
current->comm, current->tgid, current->pid,
user->remover,
task ? task->comm : "<unknown>",
task ? task->tgid : -1,
task ? task->pid : -1);
}
goto out_unlock;
}
#ifdef CONFIG_HTC_FD_MONITOR
if (in_fd_list(fd, 0) == 1) {
printk("fd error: %s(%d) tries to close fd=%d illegally\n", current->comm, current->pid, fd);
force_sig(SIGABRT, current);
spin_unlock(&files->file_lock);
force_sig(SIGABRT, current);
return 0xBADFD;
}
#endif
rcu_assign_pointer(fdt->fd[fd], NULL);
fdt->user[fd].remover = current->pid;
__clear_close_on_exec(fd, fdt);
__put_unused_fd(files, fd);
spin_unlock(&files->file_lock);
retval = filp_close(filp, files);
if (unlikely(retval == -ERESTARTSYS ||
retval == -ERESTARTNOINTR ||
retval == -ERESTARTNOHAND ||
retval == -ERESTART_RESTARTBLOCK))
retval = -EINTR;
return retval;
out_unlock:
spin_unlock(&files->file_lock);
return -EBADF;
}
SYSCALL_DEFINE1(close, unsigned int, fd)
{
int retval;
#ifdef CONFIG_HTC_FD_MONITOR
if (in_fd_list(fd, 0) == 1) {
printk("fd error: %s(%d) tries to close fd=%d illegally\n", current->comm, current->pid, fd);
force_sig(SIGABRT, current);
force_sig(SIGABRT, current);
return 0xBADFD;
}
#endif
retval = __close_fd(current->files, fd);
if (unlikely(retval == -ERESTARTSYS ||
retval == -ERESTARTNOINTR ||
retval == -ERESTARTNOHAND ||
retval == -ERESTART_RESTARTBLOCK))
retval = -EINTR;
return retval;
}