• Name: Emanuele Quattrini
• Email: eq233@yahoo.it

man 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 terminating 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 suffer 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)