Add man page

Makefile.am

@@ -2,4 +2,6 @@ SUBDIRS = lib src
 
 ACLOCAL_AMFLAGS = -I m4 --install
 
+man_MANS = wait4.1
+
 dist_doc_DATA = AUTHORS COPYING NEWS README

configure.ac

@@ -25,7 +25,7 @@ AC_CHECK_HEADERS([linux/netlink.h],
 AM_CONDITIONAL([HAVE_NETLINK], [test x$ac_cv_header_linux_netlink_h = xyes])
 
 dnl Output files
-AC_CONFIG_FILES([Makefile lib/Makefile src/Makefile])
+AC_CONFIG_FILES([Makefile wait4.1 lib/Makefile src/Makefile])
 AC_OUTPUT
 
 dnl Summary

wait4.1.in

@@ -0,0 +1,60 @@
+.TH WAIT 03/21/2013 "wait4 @PACKAGE_VERSION]" "wait4 Manual"
+
+.SH NAME
+wait4 \- Wait for arbitrary processes
+
+.SH SYNOPSIS
+.SY wait4
+.RB [ \-h | --help ]
+.RB [ \-v | --version ]
+.RB [ \-t | --timeout
+.IR time ]
+.IR pid ...
+.YS
+
+.SH DESCRIPTION
+.PP
+.B wait4
+waits for the process(es) identified by the specified PID(s)
+to terminate, and reports the termination status of the
+process whose PID is specified last.
+
+.SH OPTIONS
+.TP
+.BR -h ", " --help
+Display the help message.
+.TP
+.BR -v ", " --version
+Display the version message.
+.TP
+.BR -t ", " --timeout " " \fItime\fR
+Aborts waiting after the specified
+.I time
+(in seconds).
+
+.SH NOTES
+.PP
+The ability to report the termination status of the waited
+process depends on
+.BR netlink (7).
+On systems without netlink, a fallback
+.BR kill (2)-based
+mechanism is used, which does not allow to retrieve the
+termination status; the exit status is then always 0.
+
+.SH REPORTING BUGS
+.PP
+Report bugs to
+.MT @PACKAGE_BUGREPORT@
+Damien Goutte-Gattat
+.ME .
+
+.SH COPYRIGHT
+.ad l
+.PP
+Copyright \(co 2013 Damien Goutte-Gattat
+.PP
+This program is released under the GNU General Public License.
+See the COPYING file in the source distribution or
+.UR http://www.gnu.org/licenses/gpl.html
+.UE .