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

       strdup, strndup, strdupa, strndupa - duplicate a string

       #include <string.h>

       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

       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).

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

       ENOMEM Insufficient memory available to allocate duplicate string.

       strdup() conforms to SVr4, 4.3BSD, POSIX.1-2001.	 strndup(), strdupa(),
       and strndupa() are GNU extensions.

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

       This  page  is  part of release 3.22 of the Linux man-pages project.  A
       description of the project, and information about reporting  bugs,  can
       be found at

GNU				  2007-07-26			     STRDUP(3)

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