/usr/share/calc/help/fputstr is in apcalc-common 2.12.4.4-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 | NAME
    fputstr - send one or more null-terminated strings to a file
SYNOPSIS
    fputstr(fs, s_1, s_2, ...)
TYPES
    fs		file stream open for writing
    s_1, ...	string
    return	null or error value
DESCRIPTION
    If the stream cannot be written to or an argument is of the wrong
    type, an error value is returned.
    Otherwise the strings s_1, s_2, ..., including the terminating
    null characters ('\0') are written to the file stream fs.
EXAMPLE
    ; f = fopen("/tmp/junk", "w")
    ; fputstr(f, "Alpha", "Beta")
    ; freopen(f, "r")
    ; fgetstr(f)
	"Alpha"
    ; fgetstr(f)
	"Beta"
    ; fgetstr(f)
    ; fputstr(f, "Gamma")
	Error 72
LIMITS
    none
LINK LIBRARY
    none
SEE ALSO
    fgetstr, fgetfield, fgets, fputs, fopen, files, fprintf
## Copyright (C) 1999-2006  Landon Curt Noll
##
## Calc is open software; you can redistribute it and/or modify it under
## the terms of the version 2.1 of the GNU Lesser General Public License
## as published by the Free Software Foundation.
##
## Calc 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.
##
## A copy of version 2.1 of the GNU Lesser General Public License is
## distributed with calc under the filename COPYING-LGPL.  You should have
## received a copy with calc; if not, write to Free Software Foundation, Inc.
## 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
##
## @(#) $Revision: 30.1 $
## @(#) $Id: fputstr,v 30.1 2007/03/16 11:10:42 chongo Exp $
## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/fputstr,v $
##
## Under source code control:	1996/04/30 03:05:18
## File existed as early as:	1996
##
## chongo <was here> /\oo/\	http://www.isthe.com/chongo/
## Share and enjoy!  :-)	http://www.isthe.com/chongo/tech/comp/calc/
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