stpncpy

STPNCPY(3)                 Linux Programmer's Manual                STPNCPY(3)

NAME
       stpncpy - copy a fixed-size string, returning a pointer to its end

SYNOPSIS
       #include <string.h>

       char *stpncpy(char *dest, const char *src, size_t n);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       stpncpy():
           Since glibc 2.10:
               _POSIX_C_SOURCE >= 200809L
           Before glibc 2.10:
               _GNU_SOURCE

DESCRIPTION
       The  stpncpy()  function  copies  at  most n characters from the string
       pointed to by src, including the terminating null byte ('\0'),  to  the
       array  pointed  to  by dest.  Exactly n characters are written at dest.
       If the length strlen(src) is smaller than n, the  remaining  characters
       in  the  array pointed to by dest are filled with null bytes ('\0'), If
       the length strlen(src) is greater  than  or  equal  to  n,  the  string
       pointed to by dest will not be null-terminated.

       The strings may not overlap.

       The programmer must ensure that there is room for at least n characters
       at dest.

RETURN VALUE
       stpncpy() returns a pointer to the terminating null byte in  dest,  or,
       if dest is not null-terminated, dest+n.

ATTRIBUTES
       For  an  explanation  of  the  terms  used  in  this  section,  see at-
       tributes(7).

       +----------+---------------+---------+
       |Interface | Attribute     | Value   |
       +----------+---------------+---------+
       |stpncpy() | Thread safety | MT-Safe |
       +----------+---------------+---------+
CONFORMING TO
       This function was added to POSIX.1-2008.  Before that, it was a GNU ex-
       tension.   It  first  appeared  in version 1.07 of the GNU C library in
       1993.

SEE ALSO
       strncpy(3), wcpncpy(3)

COLOPHON
       This page is part of release 5.05 of the Linux  man-pages  project.   A
       description  of  the project, information about reporting bugs, and the
       latest    version    of    this    page,    can     be     found     at
       https://www.kernel.org/doc/man-pages/.

GNU                               2019-03-06                        STPNCPY(3)