docs: adding openproc(), readproc() and readproctab() man

proc/readproctab.3

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+.\" Copyright 1996 Helmut Geyer <Helmut.Geyer@iwr.uni-heidelberg.de>
+.\" Copyright 2014 Jaromir Capik <jcapik@redhat.com>
+.\"
+.\" 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
+.\"
+.\" Formatted or processed versions of this manual, if unaccompanied by
+.\" the source, must acknowledge the copyright and authors of this work.
+.\"
+.TH READPROCTAB 3 "14 July 2014" "Linux Manpage" "Linux Programmer's Manual"
+.SH NAME
+readproctab, freeproctab  \- read information for all current processes at once
+.SH SYNOPSIS
+.B #include <proc/readproc.h>
+.sp
+.BI "proc_t** readproctab(int " flags ", ... );"
+.br
+.BI "void freeproctab(proc_t **" p ");"
+
+.SH DESCRIPTION
+
+.B readproctab
+reads information on all processes matching the criteria from
+.IR flags ,
+allocating memory for everthing as needed. It returns a
+NULL-terminated list of
+.I proc_t
+pointers. For more information on the arguments of
+.BR readproctab ,
+see
+.BR openproc (3).
+
+.B freeproctab
+frees all memory allocated by
+.BR readproctab .
+
+The
+.I proc_t
+structure is defined in
+.IR <proc/readproc.h> ,
+please look there for a definition of all fields.
+
+.SH "SEE ALSO"
+.BR openproc (3),
+.BR readproc (3),
+.BR /proc/ ,
+.BR /usr/include/proc/readproc.h .
+.SH "REPORTING BUGS"
+Please send bug reports to
+.UR procps@freelists.org
+.UE