docs: Update the uptime man pages

Three functions in the same manpage but use the so commands
to refer to the main man page.

doc/procps_uptime.3

@@ -1,4 +1,4 @@
-.\" (C) Copyright 2016 Craig Small <csmall@enc.com.au>
+.\" (C) Copyright 2016-2020 Craig Small <csmall@dropbear.xyz>
 .\"
 .\" %%%LICENSE_START(LGPL_2.1+)
 .\" This manual is free software; you can redistribute it and/or
@@ -16,23 +16,30 @@
 .\" Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 .\" %%%LICENSE_END
 .\"
-.TH PROCPS_UPTIME 3 2016-05-01 "libproc-2"
+.TH PROCPS_UPTIME 3 2020-05-18 "libproc-2"
 .\" Please adjust this date whenever revising the manpage.
 .\"
 .SH NAME
-procps_uptime \-
+procps_uptime, procps_sprint, procps_uptime_sprint_short \-
 provide the uptime and idle time in seconds
 .SH SYNOPSIS
+.nf
 .B #include <proc/procps.h>
-.sp
+.PP
 .BI "int procps_uptime(double * " uptime_secs ", double * " idle_secs ");"
+.B char *procps_uptime_sprint(void);
+.B char *procps_uptime_sprint_short(void);
 .sp
 Link with \fI\-lprocps\fP.
 .SH DESCRIPTION
-The function
 .BR procps_uptime ()
-fills the location of the two double points with the current sytem uptime
+returns the uptime and idle time of the system. Either the
-and idle time.
+\fIuptime_secs\fR or \fIidle_secs\fR can be \fBNULL\fR in which case that
+variable will not be returned.
+
+The \fBsprint\fR variety of the functions return a human-readable
+string of the uptime and other statistics.
+
 .SH RETURN VALUE
 .BR procps_uptime ()
 returns 0 on success. On failure, it
@@ -44,6 +51,17 @@ Unable to parse the uptime file.
 .BR procps_uptime ()
 may also return any (negated) value that \fBfopen\fR() may set errno to.
 
+.BR procps_uptime_sprint_short ()
+return a string from a statically allocated buffer which displays uptime.
+
+.BR procps_uptime_sprint ()
+also displays users and load average in the buffer. The formats are the
+same as
+.BR uptime (1)
+with and without the
+.B \-p
+option.
+
 .SH FILES
 .TP
 .I /proc/uptime
@@ -54,5 +72,6 @@ The raw values for uptime and idle time.
 first appeared in libproc-2 version 0.0.
 
 .SH SEE ALSO
+.BR uptime (1),
 .BR fopen (3),
 .BR proc (5).

doc/procps_uptime_sprint.3

@@ -1,61 +1 @@
-.\" (C) Copyright 2016 Craig Small <csmall@enc.com.au>
+.so man3/procps_uptime.3
-.\"
-.\" %%%LICENSE_START(LGPL_2.1+)
-.\" This manual 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.
-.\"
-.\" This manual 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 this library; if not, write to the Free Software
-.\" Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
-.\" %%%LICENSE_END
-.\"
-.TH PROCPS_uptime_sprint_SPRINT 3 2016-04-16 "libproc-2"
-.\" Please adjust this date whenever revising the manpage.
-.\"
-.SH NAME
-procps_uptime_sprint \-
-provide the uptime and idle time in seconds
-.SH SYNOPSIS
-.B #include <proc/procps.h>
-.sp
-.B char procps_uptime_sprint(void);
-.br
-.B char procps_uptime_sprint_short(void);
-.sp
-Link with \fI\-lprocps\fP.
-.SH DESCRIPTION
-The functions
-.BR procps_uptime_sprint ()
-and
-.BR procps_uptime_sprint_short ()
-return a string from a statically allocated buffer which displays uptime
-and other system statistics. This format is similar to
-.BR w (1)
-
-.SH RETURN VALUE
-Both functions return a formatted string on success and NULL on failure.
-.PP
-.B procps_uptime_sprint
-returns a string displaying the uptime, number of users and load average.
-.PP
-.B procps_uptime_sprint_short
-returns a string displaying the uptime only.
-
-.SH VERSIONS
-.B procps_uptime_sprint()
-and
-.B procps_uptime_sprint_short()
-first appeared in libproc-2 version 0.0.
-
-.SH SEE ALSO
-.BR fopen (3),
-.BR procps_loadavg (3),
-.BR procps_uptime (3),
-.BR proc (5).

doc/procps_uptime_sprint_short.3

@@ -1 +1 @@
-.so man3/procps_uptime_sprint.1
+.so man3/procps_uptime.3