--- /dev/null
+ifeq ($(subdir), posix)
+sysdep_routines := $(sysdep_routines) __wait4_syscall
+endif
--- /dev/null
+/* Copyright (C) 1991 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 Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#include <sysdep.h>
+
+PSEUDO (__wait4_syscall, wait4)
+ ret
--- /dev/null
+/* This implements wait4 with the 4.4 BSD semantics (also those documented in
+ SunOS 4.1) on top of SunOS's wait4 system call, which has semantics
+ different from those documented. Go Sun!
+
+Copyright (C) 1991 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 Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#include <ansidecl.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+pid_t
+DEFUN(__wait4, (pid, stat_loc, options, usage),
+ pid_t pid AND union wait *stat_loc AND int options AND PTR usage)
+{
+ switch (pid)
+ {
+ case WAIT_ANY:
+ pid = 0;
+ break;
+
+ case WAIT_MYPGRP:
+ pid = - __getpgrp (0);
+ break;
+ }
+
+ return __wait4_syscall (pid, stat_loc, option, usage);
+}
--- /dev/null
+/* Copyright (C) 1991 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 Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#include <ansidecl.h>
+#include <errno.h>
+#include <sys/wait.h>
+#include <sys/types.h>
+
+
+/* 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. */
+pid_t
+DEFUN(__waitpid, (pid, stat_loc, options),
+ pid_t pid AND int *stat_loc AND int options)
+{
+ return __wait4 (pid, stat_loc, options, NULL);
+}