redhat man page for strdup

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 characters. 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 extensions.

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

GNU
								    1993-04-12								 STRDUP(3)