make getservby*_r return error code rather than -1 (and using errno)

[musl] / src / unistd / lchown.c

#include <unistd.h>
#include "syscall.h"

int lchown(const char *path, uid_t uid, gid_t gid)
{
        return syscall(SYS_lchown, path, uid, gid);
}