strndupa(3)                Library Functions Manual                strndupa(3)

NAME
       strndupa - nonstring duplicate-into-string using-alloca

LIBRARY
       Standard C library (libc, -lc)

SYNOPSIS
       #define _GNU_SOURCE  /* See feature_test_macros(7) */
       #include <string.h>  // see memory.h(3head)

       char *strndupa(size_t n;
                     const char strn[n], size_t n);

DESCRIPTION
       strndupa() is similar to strndup(3), but uses alloca(3) to allocate the
       buffer.

       It is equivalent to

           strncat(strcpy(alloca(n + 1), ""), strn, n)

RETURN VALUE
       On success, this macro returns a pointer to the duplicated string.

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

       +--------------------------------------------+---------------+---------+
       |Interface                                   | Attribute     | Value   |
       +--------------------------------------------+---------------+---------+
       |strndupa ()                                 | Thread safety | MT-Safe |
       +--------------------------------------------+---------------+---------+
STANDARDS
       GNU.

HISTORY
       GNU.

SEE ALSO
       memory.h(3head), alloca(3), strndup(3)

Linux man-pages 6.19              2026-08-17                       strndupa(3)