pw_dup
struct passwd *pw_dup(const struct passwd *);
if ((pwd = pw_dup(pwd)) == NULL)
DEF_WEAK(pw_dup);
PROTO_NORMAL(pw_dup);
npwd = pw_dup(pwd);
save = pw_dup(pw);
if (opw == NULL && (opw = pw_dup(pw)) == NULL)
if ((pw = pw_dup(pw)) == NULL)
if ((opw = pw_dup(pw)) == NULL) {
if ((pp = pw_dup(pp)) == NULL)
if ((e->pwd = pw_dup(pw)) == NULL) {