STRDUP(3)		   Linux Programmers Manual		    STRDUP(3)



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

SYNOPSIS
       #include 

       char *strdup(const char *s);

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

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       strdup(): _SVID_SOURCE || _BSD_SOURCE || _XOPEN_SOURCE >= 500
       strndup(), strdupa(), strndupa(): _GNU_SOURCE

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  ter
       minating null byte ('\0') 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
       strdup() conforms to SVr4, 4.3BSD, POSIX.1-2001.  strndup(), strdupa(),
       and strndupa() are GNU extensions.

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

COLOPHON
       This  page  is  part of release 3.05 of the Linux man-pages project.  A
       description of the project, and information about reporting  bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.



GNU				  2007-07-26			     STRDUP(3)