stpncpy(3)                 Library Functions Manual                 stpncpy(3)

NAME
       stpncpy - nonstring return-offset-pointer copy

LIBRARY
       Standard C library (libc, -lc)

SYNOPSIS
       #include <string.h>  // see memory.h(3head)

       char *stpncpy(size_t dsize;
                     char dst[restrict dsize], const char *restrict src,
                     size_t dsize);

   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
       This function is equivalent to strncpy(3), but it returns a pointer to
       one past the last nonnull written character.

       It is equivalent to

           memset(mempcpy(dst, src, strnlen(src, dsize)), '\0',
                  dsize - strnlen(src, dsize))

RETURN VALUE
       This function returns a pointer to one past the last non-null character
       written, that is, dest + strnlen(src, n).

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

       +--------------------------------------------+---------------+---------+
       |Interface                                   | Attribute     | Value   |
       +--------------------------------------------+---------------+---------+
       |stpncpy ()                                  | Thread safety | MT-Safe |
       +--------------------------------------------+---------------+---------+
STANDARDS
       POSIX.1-2008.

HISTORY
       glibc 1.07.  POSIX.1-2008.

CAVEATS
       See strncpy(3).

SEE ALSO
       memory.h(3head), string_copying(7)

Linux man-pages 6.19              2026-08-10                        stpncpy(3)