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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
     attributes(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
     extension.   It  first appeared in version 1.07 of the GNU C library in
     1993.