strdupa(3)		    Library Functions Manual		      strdupa(3)

NAME
     strdupa, strndupa - string duplicate using alloca

LIBRARY
     Standard C library (libc, -lc)

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

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

DESCRIPTION
     strdupa()
	    strdupa()  is  similar  to strdup(3), but uses alloca(3) to allocate
	    the buffer.

	    It is equivalent to

		strcpy(alloca(strlen(s) + 1), s)

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

	    It is equivalent to

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

RETURN VALUE
     On success, these macros return a pointer to the duplicated string.

ATTRIBUTES
     For an explanation of the terms used in this  section,  see  attributes(7).
     allbox; lbx lb lb l l l.  Interface Attribute Value T{ strdupa(),
     strndupa() T}   Thread safety  MT-Safe

STANDARDS
     GNU.

HISTORY
     GNU.

SEE ALSO
     alloca(3), strdup(3), strndup(3)

Linux man-pages 6.18		   2026-02-25			      strdupa(3)