- 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)