/usr/share/calc/help/fgetstr is in apcalc-common 2.12.4.4-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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fgetstr - read the next null-terminated string from a file
SYNOPSIS
fgetstr(fs)
TYPES
fs file stream open for reading
return string, null or error value
DESCRIPTION
If the stream is at end of file, the null value is returned.
If the stream cannot be read, an error value is returned.
Otherwise the function returns the string of characters from the
current file position to the first null character ('\0') (the file
position for further reading then being immediately after the '\0'),
or if no null character is encountered, the string of characters to
the end of file (the string as usual being terminated by '\0').
If the stream being read is from stdin (i.e. files(0)), the
characters entered are not displayed and reading ends when a '\0' is
entered (on many terminals this is by ctrl-@).
EXAMPLE
; f = fopen("/tmp/junk", "w")
; fputstr(f, " Alpha Beta ", "", "Gamma\n\tDelta")
; freopen(f, "r")
; fgetstr(f)
" Alpha Beta "
; fgetstr(f)
""
; fgetstr(f)
"Gamma
Delta"
; fgetstr(f)
LIMITS
none
LINK LIBRARY
none
SEE ALSO
fputstr, fgetword, 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: fgetstr,v 30.1 2007/03/16 11:10:42 chongo Exp $
## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/fgetstr,v $
##
## Under source code control: 1996/04/30 03:05:17
## 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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