oneof
int oneof(const char *, char *[], int);
if (((argnum = oneof(fs->fs_file, argv, argc)) >= 0 ||
(argnum = oneof(fsspec, argv, argc)) >= 0) &&
if ((argnum = oneof(fs->fs_file, argv, argc)) < 0 &&
(argnum = oneof(fsspec, argv, argc)) < 0) {
static int oneof(const char *target, char *list[], int cnt);
static int oneof(const char *, char *[], int cnt);
argnum = oneof(fst[i].f_mntonname, argv, argc);
argnum = oneof(fst[i].f_mntfromname,