strdup(3) [mojave man page]

STRDUP(3)						   BSD Library Functions Manual 						 STRDUP(3)

NAME

     strdup, strndup -- save a copy of a string

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <string.h>

     char *
     strdup(const char *s1);

     char *
     strndup(const char *s1, size_t n);

DESCRIPTION

     The strdup() function allocates sufficient memory for a copy of the string s1, does the copy, and returns a pointer to it.  The pointer may
     subsequently be used as an argument to the function free(3).

     If insufficient memory is available, NULL is returned and errno is set to ENOMEM.

     The strndup() function copies at most n characters from the string s1 always NUL terminating the copied string.

SEE ALSO

     free(3), malloc(3)

HISTORY

     The strdup() function first appeared in 4.4BSD.  The strndup() function was added in FreeBSD 7.2.

BSD
								 December 5, 2008							       BSD

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)