ref: d9729b6d4fdac598575a0d08fe5bbd37a1b5fdda
dir: /sys/src/ape/lib/bsd/strdup.c/
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
char*
strdup(char *p)
{
int n;
char *np;
n = strlen(p)+1;
np = malloc(n);
if(np)
memmove(np, p, n);
return np;
}