/usr/share/calc/help/strncpy 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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strncpy - copy a number of chracters from head or all of a stringr
to head or all of a string
SYNOPSIS
strncpy(s1, s2, n)
TYPES
s1 string
s2 string
n nonnegative integer
return string
DESCRIPTION
Let n1 = size(s1), n2 = size(n2), and m = min(n1, n2, n).
This function replaces the first m characters of s1 by the first
m characters of s2, and if min(n1, n) > n2, replaces the next
min(n1,n) - n2 characters of s1 by '\0'. The size of s1 and any
later characters of s1 are unchanged. The function returns s1, with
new value.
EXAMPLE
strncpy("abcdef", "xyz", 0) == "abcdef"
strncpy("abcdef", "xyz", 1) == "xbcdef"
strncpy("abcdef", "xyz", 2) == "xycdef"
strncpy("abcdef", "xyz", 3) == "xyzdef"
strncpy("abcdef", "xyz", 4) == "xyz\0ef"
strncpy("abcdef", "xyz", 5) == "xyz\0\0f"
strncpy("ab", "xyz", 3) == "xy"
LIMITS
none
LINK LIBRARY
STRING* stringncpy(STRING *s1, STRING *s2, long num)
SEE ALSO
strcat, strcpy, strerror, strlen, strncmp, strpos,
strprintf, strscan, strscanf, substr
## Copyright (C) 2006 Ernest Bowen
##
## 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.
## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
##
## @(#) $Revision: 30.1 $
## @(#) $Id: strncpy,v 30.1 2007/03/16 11:10:42 chongo Exp $
## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/strncpy,v $
##
## Under source code control: 2006/03/03 03:32:44
## File existed as early as: 2006
##
## chongo <was here> /\oo/\ http://www.isthe.com/chongo/
## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
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