--- /dev/null
+/* Copyright (C) 1991-2018 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+/*
+ * POSIX Standard: 3.2.1 Wait for Process Termination <sys/wait.h>
+ */
+
+#ifndef _SYS_WAIT_H
+#define _SYS_WAIT_H 1
+
+#include <features.h>
+
+__BEGIN_DECLS
+
+#include <bits/types.h>
+#ifndef __pid_t_defined
+typedef __pid_t pid_t;
+# define __pid_t_defined
+#endif
+
+#if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
+# include <signal.h>
+#endif
+
+#if defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K8
+/* Some older standards require the contents of struct rusage to be
+ defined here. */
+# include <bits/types/struct_rusage.h>
+#endif
+
+/* These macros could also be defined in <stdlib.h>. */
+#if !defined _STDLIB_H || (!defined __USE_XOPEN && !defined __USE_XOPEN2K8)
+/* This will define the `W*' macros for the flag
+ bits to `waitpid', `wait3', and `wait4'. */
+# include <bits/waitflags.h>
+
+/* This will define all the `__W*' macros. */
+# include <bits/waitstatus.h>
+
+# define WEXITSTATUS(status) __WEXITSTATUS (status)
+# define WTERMSIG(status) __WTERMSIG (status)
+# define WSTOPSIG(status) __WSTOPSIG (status)
+# define WIFEXITED(status) __WIFEXITED (status)
+# define WIFSIGNALED(status) __WIFSIGNALED (status)
+# define WIFSTOPPED(status) __WIFSTOPPED (status)
+# ifdef __WIFCONTINUED
+# define WIFCONTINUED(status) __WIFCONTINUED (status)
+# endif
+#endif /* <stdlib.h> not included. */
+
+#ifdef __USE_MISC
+# define WCOREFLAG __WCOREFLAG
+# define WCOREDUMP(status) __WCOREDUMP (status)
+# define W_EXITCODE(ret, sig) __W_EXITCODE (ret, sig)
+# define W_STOPCODE(sig) __W_STOPCODE (sig)
+#endif
+
+/* Wait for a child to die. When one does, put its status in *STAT_LOC
+ and return its process ID. For errors, return (pid_t) -1.
+
+ This function is a cancellation point and therefore not marked with
+ __THROW. */
+extern __pid_t wait (int *__stat_loc);
+
+#ifdef __USE_MISC
+/* Special values for the PID argument to `waitpid' and `wait4'. */
+# define WAIT_ANY (-1) /* Any process. */
+# define WAIT_MYPGRP 0 /* Any process in my process group. */
+#endif
+
+/* Wait for a child matching PID to die.
+ If PID is greater than 0, match any process whose process ID is PID.
+ If PID is (pid_t) -1, match any process.
+ If PID is (pid_t) 0, match any process with the
+ same process group as the current process.
+ If PID is less than -1, match any process whose
+ process group is the absolute value of PID.
+ If the WNOHANG bit is set in OPTIONS, and that child
+ is not already dead, return (pid_t) 0. If successful,
+ return PID and store the dead child's status in STAT_LOC.
+ Return (pid_t) -1 for errors. If the WUNTRACED bit is
+ set in OPTIONS, return status for stopped children; otherwise don't.
+
+ This function is a cancellation point and therefore not marked with
+ __THROW. */
+extern __pid_t waitpid (__pid_t __pid, int *__stat_loc, int __options);
+
+#if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
+# ifndef __id_t_defined
+typedef __id_t id_t;
+# define __id_t_defined
+# endif
+
+# include <bits/types/siginfo_t.h>
+
+/* Wait for a childing matching IDTYPE and ID to change the status and
+ place appropriate information in *INFOP.
+ If IDTYPE is P_PID, match any process whose process ID is ID.
+ If IDTYPE is P_PGID, match any process whose process group is ID.
+ If IDTYPE is P_ALL, match any process.
+ If the WNOHANG bit is set in OPTIONS, and that child
+ is not already dead, clear *INFOP and return 0. If successful, store
+ exit code and status in *INFOP.
+
+ This function is a cancellation point and therefore not marked with
+ __THROW. */
+extern int waitid (idtype_t __idtype, __id_t __id, siginfo_t *__infop,
+ int __options);
+#endif
+
+#if defined __USE_MISC \
+ || (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K)
+/* This being here makes the prototypes valid whether or not
+ we have already included <sys/resource.h> to define `struct rusage'. */
+struct rusage;
+
+/* Wait for a child to exit. When one does, put its status in *STAT_LOC and
+ return its process ID. For errors return (pid_t) -1. If USAGE is not
+ nil, store information about the child's resource usage there. If the
+ WUNTRACED bit is set in OPTIONS, return status for stopped children;
+ otherwise don't. */
+extern __pid_t wait3 (int *__stat_loc, int __options,
+ struct rusage * __usage) __THROWNL;
+#endif
+
+#ifdef __USE_MISC
+/* PID is like waitpid. Other args are like wait3. */
+extern __pid_t wait4 (__pid_t __pid, int *__stat_loc, int __options,
+ struct rusage *__usage) __THROWNL;
+#endif /* Use misc. */
+
+
+__END_DECLS
+
+#endif /* sys/wait.h */
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