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glibc  2.9
tcdrain.c
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00001 /* Copyright (C) 1995, 1996, 1997, 2002 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #include <errno.h>
00020 #include <termios.h>
00021 #include <sys/ioctl.h>
00022 #include <sysdep-cancel.h>
00023 
00024 /* Wait for pending output to be written on FD.  */
00025 int
00026 __libc_tcdrain (int fd)
00027 {
00028   if (SINGLE_THREAD_P)
00029     /* With an argument of 1, TCSBRK for output to be drain.  */
00030     return INLINE_SYSCALL (ioctl, 3, fd, TCSBRK, 1);
00031 
00032   int oldtype = LIBC_CANCEL_ASYNC ();
00033 
00034   /* With an argument of 1, TCSBRK for output to be drain.  */
00035   int result = INLINE_SYSCALL (ioctl, 3, fd, TCSBRK, 1);
00036 
00037   LIBC_CANCEL_RESET (oldtype);
00038 
00039   return result;
00040 }
00041 weak_alias (__libc_tcdrain, tcdrain)