support/xunistd.h

   1 /* POSIX-specific extra functions.
   2    Copyright (C) 2016-2017 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 /* These wrapper functions use POSIX types and therefore cannot be
  20    declared in <support/support.h>.  */
  21
  22 #ifndef SUPPORT_XUNISTD_H
  23 #define SUPPORT_XUNISTD_H
  24
  25 #include <unistd.h>
  26 #include <sys/cdefs.h>
  27
  28 __BEGIN_DECLS
  29
  30 pid_t xfork (void);
  31 pid_t xwaitpid (pid_t, int *status, int flags);
  32
  33 /* Close the file descriptor.  Ignore EINTR errors, but terminate the
  34    process on other errors.  */
  35 void xclose (int);
  36
  37 /* Write the buffer.  Retry on short writes.  */
  38 void xwrite (int, const void *, size_t);
  39
  40 /* Invoke mmap with a zero file offset.  */
  41 void *xmmap (void *addr, size_t length, int prot, int flags, int fd);
  42
  43 void xmunmap (void *addr, size_t length);
  44
  45 __END_DECLS
  46
  47 #endif /* SUPPORT_XUNISTD_H */