strndupa

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



NAME
       strdup, strndup, strdupa, strndupa - duplicate a string

SYNOPSIS
       #include <string.h>

       char *strdup(const char *s);

       #define _GNU_SOURCE
       #include <string.h>

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


DESCRIPTION
       The  strdup()  function  returns  a  pointer to a new string which is a
       duplicate of the string s.  Memory for the new string is obtained  with
       malloc(3), and can be freed with free(3).

       The  strndup()  function  is similar, but only copies at most n charac-
       ters. If s is longer than n, only n characters are copied, and a termi-
       nating NUL is added.

       strdupa  and  strndupa  are  similar, but use alloca(3) to allocate the
       buffer. They are only available when using the GNU GCC suite, and  suf-
       fer from the same limitations described in alloca(3).


RETURN VALUE
       The  strdup()  function  returns a pointer to the duplicated string, or
       NULL if insufficient memory was available.

ERRORS
       ENOMEM Insufficient memory available to allocate duplicate string.

CONFORMING TO
       SVID 3, BSD 4.3.  strndup(), strdupa(), and strndupa() are  GNU  exten-
       sions.

SEE ALSO
       alloca(3), calloc(3), free(3), malloc(3), realloc(3)



GNU                               1993-04-12                         STRDUP(3)