ref: 34eb2bfa56facb210ba6192c50f0fa3f68422245
dir: /sys/src/libc/port/strdup.c/
#include <u.h>
#include <libc.h>
char*
strdup(char *s)
{
char *ns;
ns = malloc(strlen(s) + 1);
if(ns == 0)
return 0;
setmalloctag(ns, getcallerpc(&s));
return strcpy(ns, s);
}