SYNOPSIS
#include <nng/nng.h>
char *nng_strdup(const char *src);DESCRIPTION
The nng_strdup() duplicates the string src and returns it.
This is logically equivalent to using nng_alloc()
to allocate a region of memory of strlen(s) + 1 bytes, and then
using strcpy() to copy the string into the destination before
returning it.
The returned string should be deallocated with
nng_strfree(), or may be deallocated using the
nng_free() using the length of the returned string plus
one (for the NUL terminating byte).
Do not use the system free() or similar functions to deallocate
the string, since those may use a different memory arena!
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RETURN VALUES
This function returns the new string on success, and NULL on failure.
ERRORS
No errors are returned, but a NULL return value should be
treated the same as NNG_ENOMEM.