+++ /dev/null
-.\" Copyright (c) 1993 by Thomas Koenig (ig25@rz.uni-karlsruhe.de)
-.\" and Copyright (c) 2004 by Michael Kerrisk (mtk.manpages@gmail.com)
-.\"
-.\" %%%LICENSE_START(VERBATIM)
-.\" Permission is granted to make and distribute verbatim copies of this
-.\" manual provided the copyright notice and this permission notice are
-.\" preserved on all copies.
-.\"
-.\" Permission is granted to copy and distribute modified versions of this
-.\" manual under the conditions for verbatim copying, provided that the
-.\" entire resulting derived work is distributed under the terms of a
-.\" permission notice identical to this one.
-.\"
-.\" Since the Linux kernel and libraries are constantly changing, this
-.\" manual page may be incorrect or out-of-date. The author(s) assume no
-.\" responsibility for errors or omissions, or for damages resulting from
-.\" the use of the information contained herein. The author(s) may not
-.\" have taken the same level of care in the production of this manual,
-.\" which is licensed free of charge, as they might when working
-.\" professionally.
-.\"
-.\" Formatted or processed versions of this manual, if unaccompanied by
-.\" the source, must acknowledge the copyright and authors of this work.
-.\" %%%LICENSE_END
-.\"
-.\" Modified Sat Jul 24 13:32:44 1993 by Rik Faith (faith@cs.unc.edu)
-.\" Modified Mon Jun 23 14:09:52 1997 by aeb - add EINTR.
-.\" Modified Tue Jul 7 12:26:42 1998 by aeb - changed return value wait3
-.\" Modified 2004-11-11, Michael Kerrisk <mtk.manpages@gmail.com>
-.\" Rewrote much of this page, and removed much duplicated text,
-.\" replacing with pointers to wait.2
-.\"
-.TH WAIT4 2 2012-09-23 "Linux" "Linux Programmer's Manual"
-.SH NAME
-wait3, wait4 \- wait for process to change state, BSD style
-.SH SYNOPSIS
-.nf
-.B #include <sys/types.h>
-.B #include <sys/time.h>
-.B #include <sys/resource.h>
-.B #include <sys/wait.h>
-.sp
-.BI "pid_t wait3(int *" "status" ", int " options ,
-.BI " struct rusage *" rusage );
-.sp
-.BI "pid_t wait4(pid_t " pid ", int *" status ", int " options ,
-.BI " struct rusage *" rusage );
-.fi
-.sp
-.in -4n
-Feature Test Macro Requirements for glibc (see
-.BR feature_test_macros (7)):
-.in
-.sp
-.ad l
-.BR wait3 ():
-.RS 4
-_BSD_SOURCE || _XOPEN_SOURCE\ >=\ 500 ||
-_XOPEN_SOURCE\ &&\ _XOPEN_SOURCE_EXTENDED
-.RE
-.br
-.BR wait4 ():
-.RS 4
-_BSD_SOURCE
-.RE
-.ad
-.SH DESCRIPTION
-These functions are obsolete; use
-.BR waitpid (2)
-or
-.BR waitid (2)
-in new programs.
-
-The
-.BR wait3 ()
-and
-.BR wait4 ()
-system calls are similar to
-.BR waitpid (2),
-but additionally return resource usage information about the
-child in the structure pointed to by
-.IR rusage .
-.PP
-Other than the use of the
-.I rusage
-argument, the following
-.BR wait3 ()
-call:
-.nf
-
- wait3(status, options, rusage);
-
-.fi
-is equivalent to:
-.nf
-
- waitpid(\-1, status, options);
-
-.fi
-Similarly, the following
-.BR wait4 ()
-call:
-.nf
-
- wait4(pid, status, options, rusage);
-
-.fi
-is equivalent to:
-.nf
-
- waitpid(pid, status, options);
-
-.fi
-In other words,
-.BR wait3 ()
-waits of any child, while
-.BR wait4 ()
-can be used to select a specific child, or children, on which to wait.
-See
-.BR wait (2)
-for further details.
-.PP
-If
-.I rusage
-is not NULL, the
-.I struct rusage
-to which it points will be filled with accounting information
-about the child.
-See
-.BR getrusage (2)
-for details.
-.SH RETURN VALUE
-As for
-.BR waitpid (2).
-.SH ERRORS
-As for
-.BR waitpid (2).
-.SH CONFORMING TO
-4.3BSD.
-
-SUSv1 included a specification of
-.BR wait3 ();
-SUSv2 included
-.BR wait3 (),
-but marked it LEGACY;
-SUSv3 removed it.
-.SH NOTES
-Including
-.I <sys/time.h>
-is not required these days, but increases portability.
-(Indeed,
-.I <sys/resource.h>
-defines the
-.I rusage
-structure with fields of type
-.I struct timeval
-defined in
-.IR <sys/time.h> .)
-
-On Linux,
-.BR wait3 ()
-is a library function implemented on top of the
-.BR wait4 ()
-system call.
-.SH SEE ALSO
-.BR fork (2),
-.BR getrusage (2),
-.BR sigaction (2),
-.BR signal (2),
-.BR wait (2),
-.BR signal (7)
-.SH COLOPHON
-This page is part of release 3.79 of the Linux
-.I man-pages
-project.
-A description of the project,
-information about reporting bugs,
-and the latest version of this page,
-can be found at
-\%http://www.kernel.org/doc/man\-pages/.
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