source: python/vendor/current/Python/strdup.c

/* strdup() replacement (from stdwin, if you must know) */

#include "pgenheaders.h"

char *
strdup(const char *str)
{
        if (str != NULL) {
                register char *copy = malloc(strlen(str) + 1);
                if (copy != NULL)
                        return strcpy(copy, str);
        }
        return NULL;
}