add tools

1 files changed, 1788 insertions, 0 deletions

diff --git a/bin/pax/options.c b/bin/pax/options.c
new file mode 100644
index 0000000..917414c
--- /dev/null
+++ b/bin/pax/options.c
@@ -0,0 +1,1788 @@
+/*	$OpenBSD: options.c,v 1.103 2019/11/15 20:34:17 naddy Exp $	*/
+/*	$NetBSD: options.c,v 1.6 1996/03/26 23:54:18 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.
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <limits.h>
+#include <paths.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "pax.h"
+#include "cpio.h"
+#include "tar.h"
+#include "extern.h"
+
+/*
+ * argv[0] names. Used for tar and cpio emulation
+ */
+
+#define NM_TAR  "tar"
+#define NM_CPIO "cpio"
+#define NM_PAX  "pax"
+
+/*
+ * Constants used to specify the legal sets of flags in pax. For each major
+ * operation mode of pax, a set of illegal flags is defined. If any one of
+ * those illegal flags are found set, we scream and exit
+ */
+
+/*
+ * flags (one for each option).
+ */
+#define	AF	0x00000001
+#define	BF	0x00000002
+#define	CF	0x00000004
+#define	DF	0x00000008
+#define	FF	0x00000010
+#define	IF	0x00000020
+#define	KF	0x00000040
+#define	LF	0x00000080
+#define	NF	0x00000100
+#define	OF	0x00000200
+#define	PF	0x00000400
+#define	RF	0x00000800
+#define	SF	0x00001000
+#define	TF	0x00002000
+#define	UF	0x00004000
+#define	VF	0x00008000
+#define	WF	0x00010000
+#define	XF	0x00020000
+#define	CBF	0x00040000	/* nonstandard extension */
+#define	CDF	0x00080000	/* nonstandard extension */
+#define	CEF	0x00100000	/* nonstandard extension */
+#define	CGF	0x00200000	/* nonstandard extension */
+#define	CHF	0x00400000	/* nonstandard extension */
+#define	CLF	0x00800000	/* nonstandard extension */
+#define	CPF	0x01000000	/* nonstandard extension */
+#define	CTF	0x02000000	/* nonstandard extension */
+#define	CUF	0x04000000	/* nonstandard extension */
+#define	CXF	0x08000000
+#define	CYF	0x10000000	/* nonstandard extension */
+#define	CZF	0x20000000	/* nonstandard extension */
+#define	C0F	0x40000000	/* nonstandard extension */
+
+/*
+ * ascii string indexed by bit position above (alter the above and you must
+ * alter this string) used to tell the user what flags caused us to complain
+ */
+#define FLGCH	"abcdfiklnoprstuvwxBDEGHLPTUXYZ0"
+
+/*
+ * legal pax operation bit patterns
+ */
+
+#define ISLIST(x)	(((x) & (RF|WF)) == 0)
+#define	ISEXTRACT(x)	(((x) & (RF|WF)) == RF)
+#define ISARCHIVE(x)	(((x) & (AF|RF|WF)) == WF)
+#define ISAPPND(x)	(((x) & (AF|RF|WF)) == (AF|WF))
+#define	ISCOPY(x)	(((x) & (RF|WF)) == (RF|WF))
+#define	ISWRITE(x)	(((x) & (RF|WF)) == WF)
+
+/*
+ * Illegal option flag subsets based on pax operation
+ */
+
+#define	BDEXTR	(AF|BF|LF|TF|WF|XF|CBF|CHF|CLF|CPF|CXF)
+#define	BDARCH	(CF|KF|LF|NF|PF|RF|CDF|CEF|CYF|CZF)
+#define	BDCOPY	(AF|BF|FF|OF|XF|CBF|CEF)
+#define	BDLIST (AF|BF|IF|KF|LF|OF|PF|RF|TF|UF|WF|XF|CBF|CDF|CHF|CLF|CPF|CXF|CYF|CZF)
+
+
+/*
+ * Routines which handle command line options
+ */
+
+static char flgch[] = FLGCH;	/* list of all possible flags */
+static OPLIST *ophead = NULL;	/* head for format specific options -x */
+static OPLIST *optail = NULL;	/* option tail */
+
+static int no_op(void);
+static void printflg(unsigned int);
+static off_t str_offt(char *);
+static char *get_line(FILE *fp);
+static void pax_options(int, char **);
+static void pax_usage(void);
+static void tar_options(int, char **);
+static void tar_usage(void);
+#ifndef NOCPIO
+static void cpio_options(int, char **);
+static void cpio_usage(void);
+#endif
+
+static int compress_id(char *_blk, int _size);
+static int gzip_id(char *_blk, int _size);
+static int bzip2_id(char *_blk, int _size);
+static int xz_id(char *_blk, int _size);
+
+#define GZIP_CMD	"gzip"		/* command to run as gzip */
+#define COMPRESS_CMD	"compress"	/* command to run as compress */
+#define BZIP2_CMD	"bzip2"		/* command to run as bzip2 */
+#define XZ_CMD		"xz"		/* command to run as xz */
+
+/*
+ *	Format specific routine table
+ *	(see pax.h for description of each function)
+ *
+ *	name, blksz, hdsz, udev, hlk, blkagn, inhead, id, st_read,
+ *	read, end_read, st_write, write, end_write, trail,
+ *	rd_data, wr_data, options
+ */
+
+FSUB fsub[] = {
+#ifdef NOCPIO
+/* 0: OLD BINARY CPIO */
+	{ },
+/* 1: OLD OCTAL CHARACTER CPIO */
+	{ },
+/* 2: SVR4 HEX CPIO */
+	{ },
+/* 3: SVR4 HEX CPIO WITH CRC */
+	{ },
+#else
+/* 0: OLD BINARY CPIO */
+	{"bcpio", 5120, sizeof(HD_BCPIO), 1, 0, 0, 1, bcpio_id, cpio_strd,
+	bcpio_rd, bcpio_endrd, cpio_stwr, bcpio_wr, cpio_endwr, cpio_trail,
+	bad_opt},
+
+/* 1: OLD OCTAL CHARACTER CPIO */
+	{"cpio", 5120, sizeof(HD_CPIO), 1, 0, 0, 1, cpio_id, cpio_strd,
+	cpio_rd, cpio_endrd, cpio_stwr, cpio_wr, cpio_endwr, cpio_trail,
+	bad_opt},
+
+/* 2: SVR4 HEX CPIO */
+	{"sv4cpio", 5120, sizeof(HD_VCPIO), 1, 0, 0, 1, vcpio_id, cpio_strd,
+	vcpio_rd, vcpio_endrd, cpio_stwr, vcpio_wr, cpio_endwr, cpio_trail,
+	bad_opt},
+
+/* 3: SVR4 HEX CPIO WITH CRC */
+	{"sv4crc", 5120, sizeof(HD_VCPIO), 1, 0, 0, 1, crc_id, crc_strd,
+	vcpio_rd, vcpio_endrd, crc_stwr, vcpio_wr, cpio_endwr, cpio_trail,
+	bad_opt},
+#endif
+/* 4: OLD TAR */
+	{"tar", 10240, BLKMULT, 0, 1, BLKMULT, 0, tar_id, no_op,
+	tar_rd, tar_endrd, no_op, tar_wr, tar_endwr, tar_trail,
+	tar_opt},
+
+/* 5: POSIX USTAR */
+	{"ustar", 10240, BLKMULT, 0, 1, BLKMULT, 0, ustar_id, no_op,
+	ustar_rd, tar_endrd, no_op, ustar_wr, tar_endwr, tar_trail,
+	tar_opt},
+
+#ifdef SMALL
+/* 6: compress, to detect failure to use -Z */
+	{ },
+/* 7: xz, to detect failure to decompress it */
+	{ },
+/* 8: bzip2, to detect failure to use -j */
+	{ },
+/* 9: gzip, to detect failure to use -z */
+	{ },
+#else
+/* 6: compress, to detect failure to use -Z */
+	{NULL, 0, 4, 0, 0, 0, 0, compress_id},
+/* 7: xz, to detect failure to decompress it */
+	{NULL, 0, 4, 0, 0, 0, 0, xz_id},
+/* 8: bzip2, to detect failure to use -j */
+	{NULL, 0, 4, 0, 0, 0, 0, bzip2_id},
+/* 9: gzip, to detect failure to use -z */
+	{NULL, 0, 4, 0, 0, 0, 0, gzip_id},
+#endif
+};
+#define	F_OCPIO	0	/* format when called as cpio -6 */
+#define	F_ACPIO	1	/* format when called as cpio -c */
+#define	F_CPIO	3	/* format when called as cpio */
+#define F_OTAR	4	/* format when called as tar -o */
+#define F_TAR	5	/* format when called as tar */
+#define DEFLT	5	/* default write format from list above */
+
+/*
+ * ford is the archive search order used by get_arc() to determine what kind
+ * of archive we are dealing with. This helps to properly id archive formats
+ * some formats may be subsets of others....
+ */
+int ford[] = {5, 4, 9, 8, 7, 6, 3, 2, 1, 0, -1};
+
+/*
+ * Do we have -C anywhere and what is it?
+ */
+int havechd = 0;
+char *chdname = NULL;
+
+/*
+ * options()
+ *	figure out if we are pax, tar or cpio. Call the appropriate options
+ *	parser
+ */
+
+void
+options(int argc, char **argv)
+{
+	extern char *__progname;
+
+	/*
+	 * Are we acting like pax, tar or cpio (based on argv[0])
+	 */
+	argv0 = __progname;
+
+	if (strcmp(NM_TAR, argv0) == 0) {
+		op_mode = OP_TAR;
+		tar_options(argc, argv);
+		return;
+	}
+#ifndef NOCPIO
+	else if (strcmp(NM_CPIO, argv0) == 0) {
+		op_mode = OP_CPIO;
+		cpio_options(argc, argv);
+		return;
+	}
+#endif /* !NOCPIO */
+	/*
+	 * assume pax as the default
+	 */
+	argv0 = NM_PAX;
+	op_mode = OP_PAX;
+	pax_options(argc, argv);
+}
+
+/*
+ * pax_options()
+ *	look at the user specified flags. set globals as required and check if
+ *	the user specified a legal set of flags. If not, complain and exit
+ */
+
+static void
+pax_options(int argc, char **argv)
+{
+	int c;
+	unsigned i;
+	unsigned int flg = 0;
+	unsigned int bflg = 0;
+	const char *errstr;
+	char *pt;
+
+	/*
+	 * process option flags
+	 */
+	while ((c=getopt(argc,argv,"ab:cdf:ijklno:p:rs:tuvwx:zB:DE:G:HJLOPT:U:XYZ0"))
+	    != -1) {
+		switch (c) {
+		case 'a':
+			/*
+			 * append
+			 */
+			flg |= AF;
+			break;
+		case 'b':
+			/*
+			 * specify blocksize
+			 */
+			flg |= BF;
+			if ((wrblksz = (int)str_offt(optarg)) <= 0) {
+				paxwarn(1, "Invalid block size %s", optarg);
+				pax_usage();
+			}
+			break;
+		case 'c':
+			/*
+			 * inverse match on patterns
+			 */
+			cflag = 1;
+			flg |= CF;
+			break;
+		case 'd':
+			/*
+			 * match only dir on extract, not the subtree at dir
+			 */
+			dflag = 1;
+			flg |= DF;
+			break;
+		case 'f':
+			/*
+			 * filename where the archive is stored
+			 */
+			arcname = optarg;
+			flg |= FF;
+			break;
+		case 'i':
+			/*
+			 * interactive file rename
+			 */
+			iflag = 1;
+			flg |= IF;
+			break;
+		case 'j':
+			/*
+			 * use bzip2.  Non standard option.
+			 */
+			gzip_program = BZIP2_CMD;
+			break;
+		case 'k':
+			/*
+			 * do not clobber files that exist
+			 */
+			kflag = 1;
+			flg |= KF;
+			break;
+		case 'l':
+			/*
+			 * try to link src to dest with copy (-rw)
+			 */
+			lflag = 1;
+			flg |= LF;
+			break;
+		case 'n':
+			/*
+			 * select first match for a pattern only
+			 */
+			nflag = 1;
+			flg |= NF;
+			break;
+		case 'o':
+			/*
+			 * pass format specific options
+			 */
+			flg |= OF;
+			if (opt_add(optarg) < 0)
+				pax_usage();
+			break;
+		case 'p':
+			/*
+			 * specify file characteristic options
+			 */
+			for (pt = optarg; *pt != '\0'; ++pt) {
+				switch (*pt) {
+				case 'a':
+					/*
+					 * do not preserve access time
+					 */
+					patime = 0;
+					break;
+				case 'e':
+					/*
+					 * preserve user id, group id, file
+					 * mode, access/modification times
+					 */
+					pids = 1;
+					pmode = 1;
+					patime = 1;
+					pmtime = 1;
+					break;
+				case 'm':
+					/*
+					 * do not preserve modification time
+					 */
+					pmtime = 0;
+					break;
+				case 'o':
+					/*
+					 * preserve uid/gid
+					 */
+					pids = 1;
+					break;
+				case 'p':
+					/*
+					 * preserve file mode bits
+					 */
+					pmode = 1;
+					break;
+				default:
+					paxwarn(1, "Invalid -p string: %c", *pt);
+					pax_usage();
+					break;
+				}
+			}
+			flg |= PF;
+			break;
+		case 'r':
+			/*
+			 * read the archive
+			 */
+			flg |= RF;
+			break;
+		case 's':
+			/*
+			 * file name substitution name pattern
+			 */
+			if (rep_add(optarg) < 0) {
+				pax_usage();
+				break;
+			}
+			flg |= SF;
+			break;
+		case 't':
+			/*
+			 * preserve access time on filesystem nodes we read
+			 */
+			tflag = 1;
+			flg |= TF;
+			break;
+		case 'u':
+			/*
+			 * ignore those older files
+			 */
+			uflag = 1;
+			flg |= UF;
+			break;
+		case 'v':
+			/*
+			 * verbose operation mode
+			 */
+			vflag = 1;
+			flg |= VF;
+			break;
+		case 'w':
+			/*
+			 * write an archive
+			 */
+			flg |= WF;
+			break;
+		case 'x':
+			/*
+			 * specify an archive format on write
+			 */
+			for (i = 0; i < sizeof(fsub)/sizeof(FSUB); ++i)
+				if (fsub[i].name != NULL &&
+				    strcmp(fsub[i].name, optarg) == 0)
+					break;
+			if (i < sizeof(fsub)/sizeof(FSUB)) {
+				frmt = &fsub[i];
+				flg |= XF;
+				break;
+			}
+			paxwarn(1, "Unknown -x format: %s", optarg);
+			(void)fputs("pax: Known -x formats are:", stderr);
+			for (i = 0; i < (sizeof(fsub)/sizeof(FSUB)); ++i)
+				if (fsub[i].name != NULL)
+					(void)fprintf(stderr, " %s",
+					    fsub[i].name);
+			(void)fputs("\n\n", stderr);
+			pax_usage();
+			break;
+		case 'z':
+			/*
+			 * use gzip.  Non standard option.
+			 */
+			gzip_program = GZIP_CMD;
+			break;
+		case 'B':
+			/*
+			 * non-standard option on number of bytes written on a
+			 * single archive volume.
+			 */
+			if ((wrlimit = str_offt(optarg)) <= 0) {
+				paxwarn(1, "Invalid write limit %s", optarg);
+				pax_usage();
+			}
+			if (wrlimit % BLKMULT) {
+				paxwarn(1, "Write limit is not a %d byte multiple",
+				    BLKMULT);
+				pax_usage();
+			}
+			flg |= CBF;
+			break;
+		case 'D':
+			/*
+			 * On extraction check file inode change time before the
+			 * modification of the file name. Non standard option.
+			 */
+			Dflag = 1;
+			flg |= CDF;
+			break;
+		case 'E':
+			/*
+			 * non-standard limit on read faults
+			 * 0 indicates stop after first error, values
+			 * indicate a limit
+			 */
+			flg |= CEF;
+			maxflt = strtonum(optarg, 0, INT_MAX, &errstr);
+			if (errstr) {
+				paxwarn(1, "Error count value: %s", errstr);
+				pax_usage();
+			}
+			break;
+		case 'G':
+			/*
+			 * non-standard option for selecting files within an
+			 * archive by group (gid or name)
+			 */
+			if (grp_add(optarg) < 0) {
+				pax_usage();
+				break;
+			}
+			flg |= CGF;
+			break;
+		case 'H':
+			/*
+			 * follow command line symlinks only
+			 */
+			Hflag = 1;
+			flg |= CHF;
+			break;
+		case 'J':
+			/*
+			 * use xz.  Non standard option.
+			 */
+			gzip_program = XZ_CMD;
+			break;
+		case 'L':
+			/*
+			 * follow symlinks
+			 */
+			Lflag = 1;
+			flg |= CLF;
+			break;
+		case 'O':
+			/*
+			 * Force one volume.  Non standard option.
+			 */
+			force_one_volume = 1;
+			break;
+		case 'P':
+			/*
+			 * do NOT follow symlinks (default)
+			 */
+			Lflag = 0;
+			flg |= CPF;
+			break;
+		case 'T':
+			/*
+			 * non-standard option for selecting files within an
+			 * archive by modification time range (lower,upper)
+			 */
+			if (trng_add(optarg) < 0) {
+				pax_usage();
+				break;
+			}
+			flg |= CTF;
+			break;
+		case 'U':
+			/*
+			 * non-standard option for selecting files within an
+			 * archive by user (uid or name)
+			 */
+			if (usr_add(optarg) < 0) {
+				pax_usage();
+				break;
+			}
+			flg |= CUF;
+			break;
+		case 'X':
+			/*
+			 * do not pass over mount points in the file system
+			 */
+			Xflag = 1;
+			flg |= CXF;
+			break;
+		case 'Y':
+			/*
+			 * On extraction check file inode change time after the
+			 * modification of the file name. Non standard option.
+			 */
+			Yflag = 1;
+			flg |= CYF;
+			break;
+		case 'Z':
+			/*
+			 * On extraction check modification time after the
+			 * modification of the file name. Non standard option.
+			 */
+			Zflag = 1;
+			flg |= CZF;
+			break;
+		case '0':
+			/*
+			 * Use \0 as pathname terminator.
+			 * (For use with the -print0 option of find(1).)
+			 */
+			zeroflag = 1;
+			flg |= C0F;
+			break;
+		default:
+			pax_usage();
+			break;
+		}
+	}
+
+	/*
+	 * figure out the operation mode of pax read,write,extract,copy,append
+	 * or list. check that we have not been given a bogus set of flags
+	 * for the operation mode.
+	 */
+	if (ISLIST(flg)) {
+		act = LIST;
+		listf = stdout;
+		bflg = flg & BDLIST;
+	} else if (ISEXTRACT(flg)) {
+		act = EXTRACT;
+		bflg = flg & BDEXTR;
+	} else if (ISARCHIVE(flg)) {
+		act = ARCHIVE;
+		bflg = flg & BDARCH;
+	} else if (ISAPPND(flg)) {
+		act = APPND;
+		bflg = flg & BDARCH;
+	} else if (ISCOPY(flg)) {
+		act = COPY;
+		bflg = flg & BDCOPY;
+	} else
+		pax_usage();
+	if (bflg) {
+		printflg(flg);
+		pax_usage();
+	}
+
+	/*
+	 * if we are writing (ARCHIVE) we use the default format if the user
+	 * did not specify a format. when we write during an APPEND, we will
+	 * adopt the format of the existing archive if none was supplied.
+	 */
+	if (!(flg & XF) && (act == ARCHIVE))
+		frmt = &(fsub[DEFLT]);
+
+	/*
+	 * process the args as they are interpreted by the operation mode
+	 */
+	switch (act) {
+	case LIST:
+	case EXTRACT:
+		for (; optind < argc; optind++)
+			if (pat_add(argv[optind], NULL) < 0)
+				pax_usage();
+		break;
+	case COPY:
+		if (optind >= argc) {
+			paxwarn(0, "Destination directory was not supplied");
+			pax_usage();
+		}
+		--argc;
+		dirptr = argv[argc];
+		/* FALL THROUGH */
+	case ARCHIVE:
+	case APPND:
+		for (; optind < argc; optind++)
+			if (ftree_add(argv[optind], 0) < 0)
+				pax_usage();
+		/*
+		 * no read errors allowed on updates/append operation!
+		 */
+		maxflt = 0;
+		break;
+	}
+}
+
+
+/*
+ * tar_options()
+ *	look at the user specified flags. set globals as required and check if
+ *	the user specified a legal set of flags. If not, complain and exit
+ */
+
+static void
+tar_options(int argc, char **argv)
+{
+	int c;
+	int Oflag = 0;
+	int nincfiles = 0;
+	int incfiles_max = 0;
+	struct incfile {
+		char *file;
+		char *dir;
+	};
+	struct incfile *incfiles = NULL;
+
+	/*
+	 * Set default values.
+	 */
+	rmleadslash = 1;
+
+	/*
+	 * process option flags
+	 */
+	while ((c = getoldopt(argc, argv,
+	    "b:cef:hjmopqruts:vwxzBC:HI:JLNOPXZ014578")) != -1) {
+		switch (c) {
+		case 'b':
+			/*
+			 * specify blocksize in 512-byte blocks
+			 */
+			if ((wrblksz = (int)str_offt(optarg)) <= 0) {
+				paxwarn(1, "Invalid block size %s", optarg);
+				tar_usage();
+			}
+			wrblksz *= 512;		/* XXX - check for int oflow */
+			break;
+		case 'c':
+			/*
+			 * create an archive
+			 */
+			act = ARCHIVE;
+			break;
+		case 'e':
+			/*
+			 * stop after first error
+			 */
+			maxflt = 0;
+			break;
+		case 'f':
+			/*
+			 * filename where the archive is stored
+			 */
+			arcname = optarg;
+			break;
+		case 'h':
+			/*
+			 * follow symlinks
+			 */
+			Lflag = 1;
+			break;
+		case 'j':
+			/*
+			 * use bzip2.  Non standard option.
+			 */
+			gzip_program = BZIP2_CMD;
+			break;
+		case 'm':
+			/*
+			 * do not preserve modification time
+			 */
+			pmtime = 0;
+			break;
+		case 'O':
+			Oflag = 1;
+			break;
+		case 'o':
+			Oflag = 2;
+			tar_nodir = 1;
+			break;
+		case 'p':
+			/*
+			 * preserve uid/gid and file mode, regardless of umask
+			 */
+			pmode = 1;
+			pids = 1;
+			break;
+		case 'q':
+			/*
+			 * select first match for a pattern only
+			 */
+			nflag = 1;
+			break;
+		case 'r':
+		case 'u':
+			/*
+			 * append to the archive
+			 */
+			act = APPND;
+			break;
+		case 's':
+			/*
+			 * file name substitution name pattern
+			 */
+			if (rep_add(optarg) < 0) {
+				tar_usage();
+				break;
+			}
+			break;
+		case 't':
+			/*
+			 * list contents of the tape
+			 */
+			act = LIST;
+			break;
+		case 'v':
+			/*
+			 * verbose operation mode
+			 */
+			vflag++;
+			break;
+		case 'w':
+			/*
+			 * interactive file rename
+			 */
+			iflag = 1;
+			break;
+		case 'x':
+			/*
+			 * extract an archive, preserving mode,
+			 * and mtime if possible.
+			 */
+			act = EXTRACT;
+			pmtime = 1;
+			break;
+		case 'z':
+			/*
+			 * use gzip.  Non standard option.
+			 */
+			gzip_program = GZIP_CMD;
+			break;
+		case 'B':
+			/*
+			 * Nothing to do here, this is pax default
+			 */
+			break;
+		case 'C':
+			havechd++;
+			chdname = optarg;
+			break;
+		case 'H':
+			/*
+			 * follow command line symlinks only
+			 */
+			Hflag = 1;
+			break;
+		case 'I':
+			if (++nincfiles > incfiles_max) {
+				size_t n = nincfiles + 3;
+				struct incfile *p;
+
+				p = reallocarray(incfiles, n,
+				    sizeof(*incfiles));
+				if (p == NULL) {
+					paxwarn(0, "Unable to allocate space "
+					    "for option list");
+					exit(1);
+				}
+				incfiles = p;
+				incfiles_max = n;
+			}
+			incfiles[nincfiles - 1].file = optarg;
+			incfiles[nincfiles - 1].dir = chdname;
+			break;
+		case 'J':
+			/*
+			 * use xz.  Non standard option.
+			 */
+			gzip_program = XZ_CMD;
+			break;
+		case 'L':
+			/*
+			 * follow symlinks
+			 */
+			Lflag = 1;
+			break;
+		case 'N':
+			/* numeric uid and gid only */
+			Nflag = 1;
+			break;
+		case 'P':
+			/*
+			 * do not remove leading '/' from pathnames
+			 */
+			rmleadslash = 0;
+			break;
+		case 'X':
+			/*
+			 * do not pass over mount points in the file system
+			 */
+			Xflag = 1;
+			break;
+		case 'Z':
+			/*
+			 * use compress.
+			 */
+			gzip_program = COMPRESS_CMD;
+			break;
+		case '0':
+			arcname = DEV_0;
+			break;
+		case '1':
+			arcname = DEV_1;
+			break;
+		case '4':
+			arcname = DEV_4;
+			break;
+		case '5':
+			arcname = DEV_5;
+			break;
+		case '7':
+			arcname = DEV_7;
+			break;
+		case '8':
+			arcname = DEV_8;
+			break;
+		default:
+			tar_usage();
+			break;
+		}
+	}
+	argc -= optind;
+	argv += optind;
+
+	if ((arcname == NULL) || (*arcname == '\0')) {
+		arcname = getenv("TAPE");
+		if ((arcname == NULL) || (*arcname == '\0'))
+			arcname = "-";
+	}
+	if ((arcname[0] == '-') && (arcname[1]== '\0'))
+		arcname = NULL;
+
+	/*
+	 * Traditional tar behaviour: list-like output goes to stdout unless
+	 * writing the archive there.  (pax uses stderr unless in list mode)
+	 */
+        if (act == LIST || act == EXTRACT || arcname != NULL)
+		listf = stdout;
+
+	/* Traditional tar behaviour (pax wants to read file list from stdin) */
+	if ((act == ARCHIVE || act == APPND) && argc == 0 && nincfiles == 0)
+		exit(0);
+
+	/*
+	 * process the args as they are interpreted by the operation mode
+	 */
+	switch (act) {
+	case LIST:
+	case EXTRACT:
+	default:
+		{
+			int sawpat = 0;
+			char *file, *dir;
+
+			while (nincfiles || *argv != NULL) {
+				/*
+				 * If we queued up any include files,
+				 * pull them in now.  Otherwise, check
+				 * for -I and -C positional flags.
+				 * Anything else must be a file to
+				 * extract.
+				 */
+				if (nincfiles) {
+					file = incfiles->file;
+					dir = incfiles->dir;
+					incfiles++;
+					nincfiles--;
+				} else if (strcmp(*argv, "-I") == 0) {
+					if (*++argv == NULL)
+						break;
+					file = *argv++;
+					dir = chdname;
+				} else
+					file = NULL;
+				if (file != NULL) {
+					FILE *fp;
+					char *str;
+
+					if (strcmp(file, "-") == 0)
+						fp = stdin;
+					else if ((fp = fopen(file, "r")) == NULL) {
+						syswarn(1, errno,
+						    "Unable to open %s", file);
+						tar_usage();
+					}
+					while ((str = get_line(fp)) != NULL) {
+						if (pat_add(str, dir) < 0)
+							tar_usage();
+						sawpat = 1;
+					}
+					if (ferror(fp)) {
+						syswarn(1, errno,
+						    "Unable to read from %s",
+						    strcmp(file, "-") ? file :
+						    "stdin");
+						tar_usage();
+					}
+					if (strcmp(file, "-") != 0)
+						fclose(fp);
+				} else if (strcmp(*argv, "-C") == 0) {
+					if (*++argv == NULL)
+						break;
+					chdname = *argv++;
+					havechd++;
+				} else if (pat_add(*argv++, chdname) < 0)
+					tar_usage();
+				else
+					sawpat = 1;
+			}
+			/*
+			 * if patterns were added, we are doing	chdir()
+			 * on a file-by-file basis, else, just one
+			 * global chdir (if any) after opening input.
+			 */
+			if (sawpat > 0)
+				chdname = NULL;
+		}
+		break;
+	case ARCHIVE:
+	case APPND:
+		frmt = &(fsub[Oflag ? F_OTAR : F_TAR]);
+
+		if (chdname != NULL) {	/* initial chdir() */
+			if (ftree_add(chdname, 1) < 0)
+				tar_usage();
+		}
+
+		while (nincfiles || *argv != NULL) {
+			char *file, *dir;
+
+			/*
+			 * If we queued up any include files, pull them in
+			 * now.  Otherwise, check for -I and -C positional
+			 * flags.  Anything else must be a file to include
+			 * in the archive.
+			 */
+			if (nincfiles) {
+				file = incfiles->file;
+				dir = incfiles->dir;
+				incfiles++;
+				nincfiles--;
+			} else if (strcmp(*argv, "-I") == 0) {
+				if (*++argv == NULL)
+					break;
+				file = *argv++;
+				dir = NULL;
+			} else
+				file = NULL;
+			if (file != NULL) {
+				FILE *fp;
+				char *str;
+
+				/* Set directory if needed */
+				if (dir) {
+					if (ftree_add(dir, 1) < 0)
+						tar_usage();
+				}
+
+				if (strcmp(file, "-") == 0)
+					fp = stdin;
+				else if ((fp = fopen(file, "r")) == NULL) {
+					syswarn(1, errno, "Unable to open %s",
+					    file);
+					tar_usage();
+				}
+				while ((str = get_line(fp)) != NULL) {
+					if (ftree_add(str, 0) < 0)
+						tar_usage();
+				}
+				if (ferror(fp)) {
+					syswarn(1, errno,
+					    "Unable to read from %s",
+					    strcmp(file, "-") ? file : "stdin");
+					tar_usage();
+				}
+				if (strcmp(file, "-") != 0)
+					fclose(fp);
+			} else if (strcmp(*argv, "-C") == 0) {
+				if (*++argv == NULL)
+					break;
+				if (ftree_add(*argv++, 1) < 0)
+					tar_usage();
+				havechd++;
+			} else if (ftree_add(*argv++, 0) < 0)
+				tar_usage();
+		}
+		/*
+		 * no read errors allowed on updates/append operation!
+		 */
+		maxflt = 0;
+		break;
+	}
+}
+
+int mkpath(char *);
+
+int
+mkpath(path)
+	char *path;
+{
+	struct stat sb;
+	char *slash;
+	int done = 0;
+
+	slash = path;
+
+	while (!done) {
+		slash += strspn(slash, "/");
+		slash += strcspn(slash, "/");
+
+		done = (*slash == '\0');
+		*slash = '\0';
+
+		if (stat(path, &sb)) {
+			if (errno != ENOENT || mkdir(path, 0777)) {
+				paxwarn(1, "%s", path);
+				return (-1);
+			}
+		} else if (!S_ISDIR(sb.st_mode)) {
+			syswarn(1, ENOTDIR, "%s", path);
+			return (-1);
+		}
+
+		if (!done)
+			*slash = '/';
+	}
+
+	return (0);
+}
+
+#ifndef NOCPIO
+/*
+ * cpio_options()
+ *	look at the user specified flags. set globals as required and check if
+ *	the user specified a legal set of flags. If not, complain and exit
+ */
+
+static void
+cpio_options(int argc, char **argv)
+{
+	const char *errstr;
+	int c, list_only = 0;
+	unsigned i;
+	char *str;
+	FILE *fp;
+
+	kflag = 1;
+	pids = 1;
+	pmode = 1;
+	pmtime = 0;
+	arcname = NULL;
+	dflag = 1;
+	act = -1;
+	nodirs = 1;
+	while ((c=getopt(argc,argv,"abcdfijklmoprstuvzABC:E:F:H:I:JLO:SZ6")) != -1)
+		switch (c) {
+			case 'a':
+				/*
+				 * preserve access time on files read
+				 */
+				tflag = 1;
+				break;
+			case 'b':
+				/*
+				 * swap bytes and half-words when reading data
+				 */
+				break;
+			case 'c':
+				/*
+				 * ASCII cpio header
+				 */
+				frmt = &(fsub[F_ACPIO]);
+				break;
+			case 'd':
+				/*
+				 * create directories as needed
+				 */
+				nodirs = 0;
+				break;
+			case 'f':
+				/*
+				 * invert meaning of pattern list
+				 */
+				cflag = 1;
+				break;
+			case 'i':
+				/*
+				 * restore an archive
+				 */
+				act = EXTRACT;
+				break;
+			case 'j':
+				/*
+				 * use bzip2.  Non standard option.
+				 */
+				gzip_program = BZIP2_CMD;
+				break;
+			case 'k':
+				break;
+			case 'l':
+				/*
+				 * use links instead of copies when possible
+				 */
+				lflag = 1;
+				break;
+			case 'm':
+				/*
+				 * preserve modification time
+				 */
+				pmtime = 1;
+				break;
+			case 'o':
+				/*
+				 * create an archive
+				 */
+				act = ARCHIVE;
+				if (frmt == NULL)
+					frmt = &(fsub[F_CPIO]);
+				break;
+			case 'p':
+				/*
+				 * copy-pass mode
+				 */
+				act = COPY;
+				break;
+			case 'r':
+				/*
+				 * interactively rename files
+				 */
+				iflag = 1;
+				break;
+			case 's':
+				/*
+				 * swap bytes after reading data
+				 */
+				break;
+			case 't':
+				/*
+				 * list contents of archive
+				 */
+				list_only = 1;
+				break;
+			case 'u':
+				/*
+				 * replace newer files
+				 */
+				kflag = 0;
+				break;
+			case 'v':
+				/*
+				 * verbose operation mode
+				 */
+				vflag = 1;
+				break;
+			case 'z':
+				/*
+				 * use gzip.  Non standard option.
+				 */
+				gzip_program = GZIP_CMD;
+				break;
+			case 'A':
+				/*
+				 * append mode
+				 */
+				act = APPND;
+				break;
+			case 'B':
+				/*
+				 * Use 5120 byte block size
+				 */
+				wrblksz = 5120;
+				break;
+			case 'C':
+				/*
+				 * set block size in bytes
+				 */
+				wrblksz = strtonum(optarg, 0, INT_MAX, &errstr);
+				if (errstr) {
+					paxwarn(1, "Invalid block size %s: %s",
+					    optarg, errstr);
+					pax_usage();
+				}
+				break;
+			case 'E':
+				/*
+				 * file with patterns to extract or list
+				 */
+				if ((fp = fopen(optarg, "r")) == NULL) {
+					syswarn(1, errno, "Unable to open %s",
+					    optarg);
+					cpio_usage();
+				}
+				while ((str = get_line(fp)) != NULL) {
+					pat_add(str, NULL);
+				}
+				if (ferror(fp)) {
+					syswarn(1, errno,
+					    "Unable to read from %s", optarg);
+					cpio_usage();
+				}
+				fclose(fp);
+				break;
+			case 'F':
+			case 'I':
+			case 'O':
+				/*
+				 * filename where the archive is stored
+				 */
+				if ((optarg[0] == '-') && (optarg[1]== '\0')) {
+					/*
+					 * treat a - as stdin
+					 */
+					arcname = NULL;
+					break;
+				}
+				arcname = optarg;
+				break;
+			case 'H':
+				/*
+				 * specify an archive format on write
+				 */
+				for (i = 0; i < sizeof(fsub)/sizeof(FSUB); ++i)
+					if (fsub[i].name != NULL &&
+					    strcmp(fsub[i].name, optarg) == 0)
+						break;
+				if (i < sizeof(fsub)/sizeof(FSUB)) {
+					frmt = &fsub[i];
+					break;
+				}
+				paxwarn(1, "Unknown -H format: %s", optarg);
+				(void)fputs("cpio: Known -H formats are:", stderr);
+				for (i = 0; i < (sizeof(fsub)/sizeof(FSUB)); ++i)
+					if (fsub[i].name != NULL)
+						(void)fprintf(stderr, " %s",
+						    fsub[i].name);
+				(void)fputs("\n\n", stderr);
+				cpio_usage();
+				break;
+			case 'J':
+				/*
+				 * use xz.  Non standard option.
+				 */
+				gzip_program = XZ_CMD;
+				break;
+			case 'L':
+				/*
+				 * follow symbolic links
+				 */
+				Lflag = 1;
+				break;
+			case 'S':
+				/*
+				 * swap halfwords after reading data
+				 */
+				break;
+			case 'Z':
+				/*
+				 * use compress.  Non standard option.
+				 */
+				gzip_program = COMPRESS_CMD;
+				break;
+			case '6':
+				/*
+				 * process Version 6 cpio format
+				 */
+				frmt = &(fsub[F_OCPIO]);
+				break;
+			case '?':
+			default:
+				cpio_usage();
+				break;
+		}
+	argc -= optind;
+	argv += optind;
+
+	/*
+	 * process the args as they are interpreted by the operation mode
+	 */
+	switch (act) {
+		case EXTRACT:
+			if (list_only) {
+				act = LIST;
+
+				/*
+				 * cpio is like pax: list to stderr
+				 * unless in list mode
+				 */
+				listf = stdout;
+			}
+			while (*argv != NULL)
+				if (pat_add(*argv++, NULL) < 0)
+					cpio_usage();
+			break;
+		case COPY:
+			if (*argv == NULL) {
+				paxwarn(0, "Destination directory was not supplied");
+				cpio_usage();
+			}
+			dirptr = *argv;
+			if (mkpath(dirptr) < 0)
+				cpio_usage();
+			--argc;
+			++argv;
+			/* FALL THROUGH */
+		case ARCHIVE:
+		case APPND:
+			if (*argv != NULL)
+				cpio_usage();
+			/*
+			 * no read errors allowed on updates/append operation!
+			 */
+			maxflt = 0;
+			while ((str = get_line(stdin)) != NULL) {
+				ftree_add(str, 0);
+			}
+			if (ferror(stdin)) {
+				syswarn(1, errno, "Unable to read from %s",
+				    "stdin");
+				cpio_usage();
+			}
+			break;
+		default:
+			cpio_usage();
+			break;
+	}
+}
+#endif /* !NOCPIO */
+
+/*
+ * printflg()
+ *	print out those invalid flag sets found to the user
+ */
+
+static void
+printflg(unsigned int flg)
+{
+	int nxt;
+	int pos = 0;
+
+	(void)fprintf(stderr,"%s: Invalid combination of options:", argv0);
+	while ((nxt = ffs(flg)) != 0) {
+		flg >>= nxt;
+		pos += nxt;
+		(void)fprintf(stderr, " -%c", flgch[pos-1]);
+	}
+	(void)putc('\n', stderr);
+}
+
+/*
+ * opt_next()
+ *	called by format specific options routines to get each format specific
+ *	flag and value specified with -o
+ * Return:
+ *	pointer to next OPLIST entry or NULL (end of list).
+ */
+
+OPLIST *
+opt_next(void)
+{
+	OPLIST *opt;
+
+	if ((opt = ophead) != NULL)
+		ophead = ophead->fow;
+	return(opt);
+}
+
+/*
+ * bad_opt()
+ *	generic routine used to complain about a format specific options
+ *	when the format does not support options.
+ */
+
+int
+bad_opt(void)
+{
+	OPLIST *opt;
+
+	if (ophead == NULL)
+		return(0);
+	/*
+	 * print all we were given
+	 */
+	paxwarn(1,"These format options are not supported");
+	while ((opt = opt_next()) != NULL)
+		(void)fprintf(stderr, "\t%s = %s\n", opt->name, opt->value);
+	pax_usage();
+	return(0);
+}
+
+/*
+ * opt_add()
+ *	breaks the value supplied to -o into a option name and value. options
+ *	are given to -o in the form -o name-value,name=value
+ *	multiple -o may be specified.
+ * Return:
+ *	0 if format in name=value format, -1 if -o is passed junk
+ */
+
+int
+opt_add(const char *str)
+{
+	OPLIST *opt;
+	char *frpt;
+	char *pt;
+	char *endpt;
+	char *dstr;
+
+	if ((str == NULL) || (*str == '\0')) {
+		paxwarn(0, "Invalid option name");
+		return(-1);
+	}
+	if ((dstr = strdup(str)) == NULL) {
+		paxwarn(0, "Unable to allocate space for option list");
+		return(-1);
+	}
+	frpt = endpt = dstr;
+
+	/*
+	 * break into name and values pieces and stuff each one into a
+	 * OPLIST structure. When we know the format, the format specific
+	 * option function will go through this list
+	 */
+	while ((frpt != NULL) && (*frpt != '\0')) {
+		if ((endpt = strchr(frpt, ',')) != NULL)
+			*endpt = '\0';
+		if ((pt = strchr(frpt, '=')) == NULL) {
+			paxwarn(0, "Invalid options format");
+			free(dstr);
+			return(-1);
+		}
+		if ((opt = malloc(sizeof(OPLIST))) == NULL) {
+			paxwarn(0, "Unable to allocate space for option list");
+			free(dstr);
+			return(-1);
+		}
+		dstr = NULL;	/* parts of string going onto the OPLIST */
+		*pt++ = '\0';
+		opt->name = frpt;
+		opt->value = pt;
+		opt->fow = NULL;
+		if (endpt != NULL)
+			frpt = endpt + 1;
+		else
+			frpt = NULL;
+		if (ophead == NULL) {
+			optail = ophead = opt;
+			continue;
+		}
+		optail->fow = opt;
+		optail = opt;
+	}
+	free(dstr);
+	return(0);
+}
+
+/*
+ * str_offt()
+ *	Convert an expression of the following forms to an off_t > 0.
+ *	1) A positive decimal number.
+ *	2) A positive decimal number followed by a b (mult by 512).
+ *	3) A positive decimal number followed by a k (mult by 1024).
+ *	4) A positive decimal number followed by a m (mult by 512).
+ *	5) A positive decimal number followed by a w (mult by sizeof int)
+ *	6) Two or more positive decimal numbers (with/without k,b or w).
+ *	   separated by x (also * for backwards compatibility), specifying
+ *	   the product of the indicated values.
+ * Return:
+ *	0 for an error, a positive value o.w.
+ */
+
+static off_t
+str_offt(char *val)
+{
+	char *expr;
+	off_t num, t;
+
+	num = strtoll(val, &expr, 0);
+	if ((num == LLONG_MAX) || (num <= 0) || (expr == val))
+		return(0);
+
+	switch (*expr) {
+	case 'b':
+		t = num;
+		num *= 512;
+		if (t > num)
+			return(0);
+		++expr;
+		break;
+	case 'k':
+		t = num;
+		num *= 1024;
+		if (t > num)
+			return(0);
+		++expr;
+		break;
+	case 'm':
+		t = num;
+		num *= 1048576;
+		if (t > num)
+			return(0);
+		++expr;
+		break;
+	case 'w':
+		t = num;
+		num *= sizeof(int);
+		if (t > num)
+			return(0);
+		++expr;
+		break;
+	}
+
+	switch (*expr) {
+		case '\0':
+			break;
+		case '*':
+		case 'x':
+			t = num;
+			num *= str_offt(expr + 1);
+			if (t > num)
+				return(0);
+			break;
+		default:
+			return(0);
+	}
+	return(num);
+}
+
+char *
+get_line(FILE *f)
+{
+	char *str = NULL;
+	size_t size = 0;
+	ssize_t len;
+
+	do {
+		len = getline(&str, &size, f);
+		if (len == -1) {
+			free(str);
+			return NULL;
+		}
+		if (str[len - 1] == '\n')
+			str[len - 1] = '\0';
+	} while (str[0] == '\0');
+	return str;
+}
+
+/*
+ * no_op()
+ *	for those option functions where the archive format has nothing to do.
+ * Return:
+ *	0
+ */
+
+static int
+no_op(void)
+{
+	return(0);
+}
+
+/*
+ * pax_usage()
+ *	print the usage summary to the user
+ */
+
+void
+pax_usage(void)
+{
+	(void)fputs(
+	    "usage: pax [-0cdjnOvz] [-E limit] [-f archive] [-G group] [-s replstr]\n"
+	    "           [-T range] [-U user] [pattern ...]\n"
+	    "       pax -r [-0cDdijknOuvYZz] [-E limit] [-f archive] [-G group] [-o options]\n"
+	    "           [-p string] [-s replstr] [-T range] [-U user] [pattern ...]\n"
+	    "       pax -w [-0adHijLOPtuvXz] [-B bytes] [-b blocksize] [-f archive]\n"
+	    "           [-G group] [-o options] [-s replstr] [-T range] [-U user]\n"
+	    "           [-x format] [file ...]\n"
+	    "       pax -rw [-0DdHikLlnOPtuvXYZ] [-G group] [-p string] [-s replstr]\n"
+	    "           [-T range] [-U user] [file ...] directory\n",
+	    stderr);
+	exit(1);
+}
+
+/*
+ * tar_usage()
+ *	print the usage summary to the user
+ */
+
+void
+tar_usage(void)
+{
+	(void)fputs(
+	    "usage: tar {crtux}[014578befHhjLmNOoPpqsvwXZz]\n"
+	    "           [blocking-factor | archive | replstr] [-C directory] [-I file]\n"
+	    "           [file ...]\n"
+	    "       tar {-crtux} [-014578eHhjLmNOoPpqvwXZz] [-b blocking-factor]\n"
+	    "           [-C directory] [-f archive] [-I file] [-s replstr] [file ...]\n",
+	    stderr);
+	exit(1);
+}
+
+#ifndef NOCPIO
+/*
+ * cpio_usage()
+ *	print the usage summary to the user
+ */
+
+void
+cpio_usage(void)
+{
+	(void)fputs(
+	    "usage: cpio -o [-AaBcjLvZz] [-C bytes] [-F archive] [-H format]\n"
+	    "            [-O archive] < name-list [> archive]\n"
+	    "       cpio -i [-6BbcdfjmrSstuvZz] [-C bytes] [-E file] [-F archive] [-H format]\n"
+	    "            [-I archive] [pattern ...] [< archive]\n"
+	    "       cpio -p [-adLlmuv] destination-directory < name-list\n",
+	    stderr);
+	exit(1);
+}
+#endif /* !NOCPIO */
+
+#ifndef SMALL
+static int
+compress_id(char *blk, int size)
+{
+	if (size >= 2 && blk[0] == '\037' && blk[1] == '\235') {
+		paxwarn(0, "input compressed with %s; use the -%c option"
+		    " to decompress it", "compress", 'Z');
+		exit(1);
+	}
+	return (-1);
+}
+
+static int
+gzip_id(char *blk, int size)
+{
+	if (size >= 2 && blk[0] == '\037' && blk[1] == '\213') {
+		paxwarn(0, "input compressed with %s; use the -%c option"
+		    " to decompress it", "gzip", 'z');
+		exit(1);
+	}
+	return (-1);
+}
+
+static int
+bzip2_id(char *blk, int size)
+{
+	if (size >= 3 && blk[0] == 'B' && blk[1] == 'Z' && blk[2] == 'h') {
+		paxwarn(0, "input compressed with %s; use the -%c option"
+		    " to decompress it", "bzip2", 'j');
+		exit(1);
+	}
+	return (-1);
+}
+
+static int
+xz_id(char *blk, int size)
+{
+	if (size >= 6 && memcmp(blk, "\xFD\x37\x7A\x58\x5A", 6) == 0) {
+		paxwarn(0, "input compressed with xz");
+		exit(1);
+	}
+	return (-1);
+}
+#endif /* !SMALL */