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Provide a pax format specific option handler

The existing tar_opt() implements support for -o write_opt=nodir for the
old tar and ustar formats. We don't really want to support it for the
pax format, and we want to be able to implement pax format specific
options (even if there are none right now).  ok millert@

/*	$OpenBSD: extern.h,v 1.64 2024/04/17 18:12:12 jca Exp $	*/
/*	$NetBSD: extern.h,v 1.5 1996/03/26 23:54:16 mrg Exp $	*/

/*-
 * Copyright (c) 1992 Keith Muller.
 * Copyright (c) 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Keith Muller of the University of California, San Diego.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)extern.h	8.2 (Berkeley) 4/18/94
 */

/*
 * External references from each source file
 */

/*
 * ar_io.c
 */
extern const char *arcname;
extern const char *gzip_program;
extern int force_one_volume;
int ar_open(const char *);
void ar_close(int _in_sig);
void ar_drain(void);
int ar_set_wr(void);
int ar_app_ok(void);
int ar_read(char *, int);
int ar_write(char *, int);
int ar_rdsync(void);
int ar_fow(off_t, off_t *);
int ar_rev(off_t );
int ar_next(void);

/*
 * ar_subs.c
 */
extern u_long flcnt;
void list(void);
void extract(void);
void append(void);
void archive(void);
void copy(void);

/*
 * buf_subs.c
 */
extern int blksz;
extern int wrblksz;
extern int maxflt;
extern int rdblksz;
extern off_t wrlimit;
extern off_t rdcnt;
extern off_t wrcnt;
int wr_start(void);
int rd_start(void);
void cp_start(void);
int appnd_start(off_t);
int rd_sync(void);
void pback(char *, int);
int rd_skip(off_t);
void wr_fin(void);
int wr_rdbuf(char *, int);
int rd_wrbuf(char *, int);
int wr_skip(off_t);
int wr_rdfile(ARCHD *, int, off_t *);
int rd_wrfile(ARCHD *, int, off_t *);
void cp_file(ARCHD *, int, int);

/*
 * cpio.c
 */
int cpio_strd(void);
int cpio_trail(ARCHD *, char *, int, int *);
int cpio_endwr(void);
int cpio_id(char *, int);
int cpio_rd(ARCHD *, char *);
off_t cpio_endrd(void);
int cpio_stwr(void);
int cpio_wr(ARCHD *);
int vcpio_id(char *, int);
int crc_id(char *, int);
int crc_strd(void);
int vcpio_rd(ARCHD *, char *);
off_t vcpio_endrd(void);
int crc_stwr(void);
int vcpio_wr(ARCHD *);
int bcpio_id(char *, int);
int bcpio_rd(ARCHD *, char *);
off_t bcpio_endrd(void);
int bcpio_wr(ARCHD *);

/*
 * file_subs.c
 */
int file_creat(ARCHD *);
void file_close(ARCHD *, int);
int lnk_creat(ARCHD *);
int cross_lnk(ARCHD *);
int chk_same(ARCHD *);
int node_creat(ARCHD *);
void set_ftime(const char *, const struct timespec *,
    const struct timespec *, int);
int set_ids(char *, uid_t, gid_t);
void set_pmode(char *, mode_t);
int set_attr(const struct file_times *, int _force_times, mode_t, int _do_mode,
    int _in_sig);
int file_write(int, char *, int, int *, int *, int, char *);
void file_flush(int, char *, int);
void rdfile_close(ARCHD *, int *);
int set_crc(ARCHD *, int);

/*
 * ftree.c
 */
int ftree_start(void);
int ftree_add(char *, int);
void ftree_sel(ARCHD *);
void ftree_skipped_newer(ARCHD *);
void ftree_chk(void);
int next_file(ARCHD *);

/*
 * gen_subs.c
 */
void ls_list(ARCHD *, time_t, FILE *);
void ls_tty(ARCHD *);
void safe_print(const char *, FILE *);
u_long asc_ul(char *, int, int);
int ul_asc(u_long, char *, int, int);
unsigned long long asc_ull(char *, int, int);
int ull_asc(unsigned long long, char *, int, int);
size_t fieldcpy(char *, size_t, const char *, size_t);

/*
 * getoldopt.c
 */
int getoldopt(int, char **, const char *);

/*
 * options.c
 */
extern FSUB fsub[];
extern int ford[];
void options(int, char **);
OPLIST * opt_next(void);
extern char *chdname;

/*
 * pat_rep.c
 */
int rep_add(char *);
int pat_add(char *, char *);
void pat_chk(void);
int pat_sel(ARCHD *);
int pat_match(ARCHD *);
int mod_name(ARCHD *);
int set_dest(ARCHD *, char *, int);
int has_dotdot(const char *);

/*
 * pax.c
 */
extern int act;
extern FSUB *frmt;
extern int cflag;
extern int cwdfd;
extern int dflag;
extern int iflag;
extern int kflag;
extern int lflag;
extern int nflag;
extern int tflag;
extern int uflag;
extern int vflag;
extern int Dflag;
extern int Hflag;
extern int Lflag;
extern int Nflag;
extern int Xflag;
extern int Yflag;
extern int Zflag;
extern int zeroflag;
extern int vfpart;
extern int patime;
extern int pmtime;
extern int nodirs;
extern int pmode;
extern int pids;
extern int rmleadslash;
extern int exit_val;
extern int docrc;
extern char *dirptr;
extern char *argv0;
extern enum op_mode { OP_PAX, OP_TAR, OP_CPIO } op_mode;
extern FILE *listf;
extern int listfd;
extern char *tempfile;
extern char *tempbase;
extern int havechd;


/*
 * sel_subs.c
 */
int sel_chk(ARCHD *);
int grp_add(char *);
int usr_add(char *);
int trng_add(char *);

/*
 * tables.c
 */
int lnk_start(void);
int chk_lnk(ARCHD *);
void purg_lnk(ARCHD *);
void lnk_end(void);
int ftime_start(void);
int chk_ftime(ARCHD *);
int sltab_start(void);
int sltab_add_sym(const char *_path, const char *_value, mode_t _mode);
int sltab_add_link(const char *, const struct stat *);
void sltab_process(int _in_sig);
int name_start(void);
int add_name(char *, int, char *);
void sub_name(char *, int *, int);
#ifndef NOCPIO
int dev_start(void);
int add_dev(ARCHD *);
int map_dev(ARCHD *, u_long, u_long);
#else
# define dev_start()	0
# define add_dev(x)	0
# define map_dev(x,y,z)	0
#endif /* NOCPIO */
int atdir_start(void);
void atdir_end(void);
void add_atdir(char *, dev_t, ino_t, const struct timespec *,
    const struct timespec *);
int do_atdir(const char *, dev_t, ino_t);
int dir_start(void);
void add_dir(char *, struct stat *, int);
void delete_dir(dev_t, ino_t);
void proc_dir(int _in_sig);

/*
 * tar.c
 */
extern int tar_nodir;
extern char *gnu_name_string, *gnu_link_string;
int tar_endwr(void);
off_t tar_endrd(void);
int tar_trail(ARCHD *, char *, int, int *);
int tar_id(char *, int);
int tar_opt(void);
int tar_rd(ARCHD *, char *);
int tar_wr(ARCHD *);
int ustar_id(char *, int);
int ustar_rd(ARCHD *, char *);
int ustar_wr(ARCHD *);
int pax_id(char *, int);
int pax_opt(void);
int pax_wr(ARCHD *);

/*
 * tty_subs.c
 */
int tty_init(void);
void tty_prnt(const char *, ...)
    __attribute__((nonnull(1), format(printf, 1, 2)));
int tty_read(char *, int);
void paxwarn(int, const char *, ...)
    __attribute__((nonnull(2), format(printf, 2, 3)));
void syswarn(int, int, const char *, ...)
    __attribute__((nonnull(3), format(printf, 3, 4)));