1  /* Copyright (C) 2021-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <unistd.h>
      19  #include <hurd.h>
      20  #include <hurd/fd.h>
      21  
      22  /* Close the file descriptors from FIRST up to LAST, inclusive.
      23     If CLOSE_RANGE_CLOEXEC is set in FLAGS, set the FD_CLOEXEC flag
      24     instead of closing.  */
      25  int
      26  __close_range (unsigned int first, unsigned int last,
      27                 int flags)
      28  {
      29    int i;
      30  
      31    if (first > last)
      32      return __hurd_fail (EINVAL);
      33    if (flags & ~CLOSE_RANGE_CLOEXEC)
      34      return __hurd_fail (EINVAL);
      35  
      36    HURD_CRITICAL_BEGIN;
      37    __mutex_lock (&_hurd_dtable_lock);
      38  
      39    for (i = first; i <= last && i < _hurd_dtablesize; i++)
      40      {
      41        struct hurd_fd *fd = _hurd_dtable[i];
      42  
      43        if (fd == NULL || fd->port.port == MACH_PORT_NULL)
      44          continue;
      45  
      46        __spin_lock (&fd->port.lock);
      47  
      48        if (flags & CLOSE_RANGE_CLOEXEC)
      49          fd->flags |= FD_CLOEXEC;
      50        else
      51          {
      52            _hurd_port_set (&fd->ctty, MACH_PORT_NULL);
      53            _hurd_port_locked_set (&fd->port, MACH_PORT_NULL);
      54          }
      55  
      56        __spin_unlock (&fd->port.lock);
      57      }
      58  
      59    __mutex_unlock (&_hurd_dtable_lock);
      60    HURD_CRITICAL_END;
      61  
      62    return 0;
      63  }
      64  
      65  libc_hidden_def (__close_range)
      66  weak_alias (__close_range, close_range)