BSD 4.4 Lite bin Sources

1 files changed, 1140 insertions, 0 deletions

diff --git a/bin/pax/options.c b/bin/pax/options.c
new file mode 100644
index 0000000..a7233fb
--- /dev/null
+++ b/bin/pax/options.c
@@ -0,0 +1,1140 @@
+/*-
+ * 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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. 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.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)options.c	8.2 (Berkeley) 4/18/94";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/stat.h>
+#include <sys/mtio.h>
+#include <sys/param.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <limits.h>
+#include "pax.h"
+#include "options.h"
+#include "cpio.h"
+#include "tar.h"
+#include "extern.h"
+
+/*
+ * 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 __P((void));
+static void printflg __P((unsigned int));
+static int c_frmt __P((const void *, const void *));
+static off_t str_offt __P((char *));
+static void pax_options __P((register int, register char **));
+static void pax_usage __P((void));
+static void tar_options __P((register int, register char **));
+static void tar_usage __P((void));
+#ifdef notdef
+static void cpio_options __P((register int, register char **));
+static void cpio_usage __P((void));
+#endif
+
+/*
+ *	Format specific routine table - MUST BE IN SORTED ORDER BY NAME
+ *	(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[] = {
+/* 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,
+	rd_wrfile, wr_rdfile, 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,
+	rd_wrfile, wr_rdfile, 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,
+	rd_wrfile, wr_rdfile, 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,
+	rd_wrfile, wr_rdfile, bad_opt,
+
+/* 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,
+	rd_wrfile, wr_rdfile, tar_opt,
+
+/* 5: POSIX USTAR */
+	"ustar", 10240, BLKMULT, 0, 1, BLKMULT, 0, ustar_id, ustar_strd,
+	ustar_rd, tar_endrd, ustar_stwr, ustar_wr, tar_endwr, tar_trail,
+	rd_wrfile, wr_rdfile, bad_opt,
+};
+#define F_TAR	4	/* 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, 3, 2, 1, 0, -1 };
+
+/*
+ * options()
+ *	figure out if we are pax, tar or cpio. Call the appropriate options
+ *	parser
+ */
+
+#if __STDC__
+void
+options(register int argc, register char **argv)
+#else
+void
+options(argc, argv)
+	register int argc;
+	register char **argv;
+#endif
+{
+
+	/*
+	 * Are we acting like pax, tar or cpio (based on argv[0])
+	 */
+	if ((argv0 = strrchr(argv[0], '/')) != NULL)
+		argv0++;
+	else
+		argv0 = argv[0];
+
+	if (strcmp(NM_TAR, argv0) == 0)
+		return(tar_options(argc, argv));
+#	ifdef notdef
+	else if (strcmp(NM_CPIO, argv0) == 0)
+		return(cpio_options(argc, argv));
+#	endif
+	/*
+	 * assume pax as the default
+	 */
+	argv0 = NM_PAX;
+	return(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
+ */
+
+#if __STDC__
+static void
+pax_options(register int argc, register char **argv)
+#else
+static void
+pax_options(argc, argv)
+	register int argc;
+	register char **argv;
+#endif
+{
+	register int c;
+	register int i;
+	unsigned int flg = 0;
+	unsigned int bflg = 0;
+	register char *pt;
+        FSUB tmp;
+	extern char *optarg;
+	extern int optind;
+
+	/*
+	 * process option flags
+	 */
+	while ((c=getopt(argc,argv,"ab:cdf:iklno:p:rs:tuvwx:B:DE:G:HLPT:U:XYZ"))
+	    != EOF) {
+		switch (c) {
+		case 'a':
+			/*
+			 * append
+			 */
+			flg |= AF;
+			break;
+		case 'b':
+			/*
+			 * specify blocksize
+			 */
+			flg |= BF;
+			if ((wrblksz = (int)str_offt(optarg)) <= 0) {
+				warn(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 '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':
+					/*
+					 * preserver file mode bits
+					 */
+					pmode = 1;
+					break;
+				default:
+					warn(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
+			 */
+			tmp.name = optarg;
+			if (frmt = (FSUB *)bsearch((void *)&tmp, (void *)fsub,
+			    sizeof(fsub)/sizeof(FSUB), sizeof(FSUB), c_frmt)) {
+				flg |= XF;
+				break;
+			}
+			warn(1, "Unknown -x format: %s", optarg);
+			(void)fputs("pax: Known -x formats are:", stderr);
+			for (i = 0; i < (sizeof(fsub)/sizeof(FSUB)); ++i)
+				(void)fprintf(stderr, " %s", fsub[i].name);
+			(void)fputs("\n\n", stderr);
+			pax_usage();
+			break;
+		case 'B':
+			/*
+			 * non-standard option on number of bytes written on a
+			 * single archive volume.
+			 */
+			if ((wrlimit = str_offt(optarg)) <= 0) {
+				warn(1, "Invalid write limit %s", optarg);
+				pax_usage();
+			}
+			if (wrlimit % BLKMULT) {
+				warn(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, "NONE" try forever
+			 */
+			flg |= CEF;
+			if (strcmp(NONE, optarg) == 0)
+				maxflt = -1;
+			else if ((maxflt = atoi(optarg)) < 0) {
+				warn(1, "Error count value must be positive");
+				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 'L':
+			/*
+			 * follow symlinks
+			 */
+			Lflag = 1;
+			flg |= CLF;
+			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 '?':
+		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;
+		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]) < 0)
+				pax_usage();
+		break;
+	case COPY:
+		if (optind >= argc) {
+			warn(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)
+				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
+ */
+
+#if __STDC__
+static void
+tar_options(register int argc, register char **argv)
+#else
+static void
+tar_options(argc, argv)
+	register int argc;
+	register char **argv;
+#endif
+{
+	register char *cp;
+	int fstdin = 0;
+
+	if (argc < 2)
+		tar_usage();
+	/*
+	 * process option flags
+	 */
+	++argv;
+	for (cp = *argv++; *cp != '\0'; ++cp) {
+		switch (*cp) {
+		case '-':
+			/*
+			 * skip over -
+			 */
+			break;
+		case 'b':
+			/*
+			 * specify blocksize
+			 */
+			if (*argv == (char *)NULL) {
+				warn(1,"blocksize must be specified with 'b'");
+				tar_usage();
+			}
+			if ((wrblksz = (int)str_offt(*argv)) <= 0) {
+				warn(1, "Invalid block size %s", *argv);
+				tar_usage();
+			}
+			++argv;
+			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
+			 */
+			if (*argv == (char *)NULL) {
+				warn(1, "filename must be specified with 'f'");
+				tar_usage();
+			}
+			if ((argv[0][0] == '-') && (argv[0][1]== '\0')) {
+				/*
+				 * treat a - as stdin
+				 */
+				++argv;
+				++fstdin;
+				arcname = (char *)0;
+				break;
+			}
+			fstdin = 0;
+			arcname = *argv++;
+			break;
+		case 'm':
+			/*
+			 * do not preserve modification time
+			 */
+			pmtime = 0;
+			break;
+		case 'o':
+			if (opt_add("write_opt=nodir") < 0)
+				tar_usage();
+			break;
+		case 'p':
+			/*
+			 * preserve user id, group id, file
+			 * mode, access/modification times
+			 */
+			pids = 1;
+			pmode = 1;
+			patime = 1;
+			pmtime = 1;
+			break;
+		case 'r':
+		case 'u':
+			/*
+			 * append to the archive
+			 */
+			act = APPND;
+			break;
+		case 't':
+			/*
+			 * list contents of the tape
+			 */
+			act = LIST;
+			break;
+		case 'v':
+			/*
+			 * verbose operation mode
+			 */
+			vflag = 1;
+			break;
+		case 'w':
+			/*
+			 * interactive file rename
+			 */
+			iflag = 1;
+			break;
+		case 'x':
+			/*
+			 * write an archive
+			 */
+			act = EXTRACT;
+			break;
+		case 'B':
+			/*
+			 * Nothing to do here, this is pax default
+			 */
+			break;
+		case 'H':
+			/*
+			 * follow command line symlinks only
+			 */
+			Hflag = 1;
+			break;
+		case 'L':
+			/*
+			 * follow symlinks
+			 */
+			Lflag = 1;
+			break;
+		case 'P':
+			/*
+			 * do not follow symlinks
+			 */
+			Lflag = 0;
+			break;
+		case 'X':
+			/*
+			 * do not pass over mount points in the file system
+			 */
+			Xflag = 1;
+			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;
+		}
+	}
+
+	/*
+	 * if we are writing (ARCHIVE) specify tar, otherwise run like pax
+	 */
+	if (act == ARCHIVE)
+		frmt = &(fsub[F_TAR]);
+
+	/*
+	 * process the args as they are interpreted by the operation mode
+	 */
+	switch (act) {
+	case LIST:
+	case EXTRACT:
+	default:
+		while (*argv != (char *)NULL)
+			if (pat_add(*argv++) < 0)
+				tar_usage();
+		break;
+	case ARCHIVE:
+	case APPND:
+		while (*argv != (char *)NULL)
+			if (ftree_add(*argv++) < 0)
+				tar_usage();
+		/*
+		 * no read errors allowed on updates/append operation!
+		 */
+		maxflt = 0;
+		break;
+	}
+	if (!fstdin && ((arcname == (char *)NULL) || (*arcname == '\0'))) {
+		arcname = getenv("TAPE");
+		if ((arcname == (char *)NULL) || (*arcname == '\0'))
+			arcname = DEV_8;
+	}
+}
+
+#ifdef notdef
+/*
+ * 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
+ */
+
+#if __STDC__
+static void
+cpio_options(register int argc, register char **argv)
+#else
+static void
+cpio_options(argc, argv)
+	register int argc;
+	register char **argv;
+#endif
+{
+}
+#endif
+
+/*
+ * printflg()
+ *	print out those invalid flag sets found to the user
+ */
+
+#if __STDC__
+static void
+printflg(unsigned int flg)
+#else
+static void
+printflg(flg)
+	unsigned int flg;
+#endif
+{
+	int nxt;
+	int pos = 0;
+
+	(void)fprintf(stderr,"%s: Invalid combination of options:", argv0);
+	while (nxt = ffs(flg)) {
+		flg = flg >> nxt;
+		pos += nxt;
+		(void)fprintf(stderr, " -%c", flgch[pos-1]);
+	}
+	(void)putc('\n', stderr);
+}
+
+/*
+ * c_frmt()
+ *	comparison routine used by bsearch to find the format specified
+ *	by the user
+ */
+
+#if __STDC__
+static int
+c_frmt(const void *a, const void *b)
+#else
+static int
+c_frmt(a, b)
+        void *a;
+        void *b;
+#endif
+{
+        return(strcmp(((FSUB *)a)->name, ((FSUB *)b)->name));
+}
+
+/*
+ * 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).
+ */
+
+#if __STDC__
+OPLIST *
+opt_next(void)
+#else
+OPLIST *
+opt_next()
+#endif
+{
+	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.
+ */
+
+#if __STDC__
+int
+bad_opt(void)
+#else
+int
+bad_opt()
+#endif
+{
+	register OPLIST *opt;
+
+	if (ophead == NULL)
+		return(0);
+	/*
+	 * print all we were given
+	 */
+	warn(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
+ *	mulltiple -o may be specified.
+ * Return:
+ *	0 if format in name=value format, -1 if -o is passed junk
+ */
+
+#if __STDC__
+int
+opt_add(register char *str)
+#else
+int
+opt_add(str)
+	register char *str;
+#endif
+{
+	register OPLIST *opt;
+	register char *frpt;
+	register char *pt;
+	register char *endpt;
+
+	if ((str == NULL) || (*str == '\0')) {
+		warn(0, "Invalid option name");
+		return(-1);
+	}
+	frpt = endpt = str;
+
+	/*
+	 * 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) {
+			warn(0, "Invalid options format");
+			return(-1);
+		}
+		if ((opt = (OPLIST *)malloc(sizeof(OPLIST))) == NULL) {
+			warn(0, "Unable to allocate space for option list");
+			return(-1);
+		}
+		*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;
+	}
+	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).
+ *	   seperated by x (also * for backwards compatibility), specifying
+ *	   the product of the indicated values.
+ * Return:
+ *	0 for an error, a positive value o.w.
+ */
+
+#if __STDC__
+static off_t
+str_offt(char *val)
+#else
+static off_t
+str_offt(val)
+	char *val;
+#endif
+{
+	char *expr;
+	off_t num, t;
+
+#	ifdef NET2_STAT
+	num = strtol(val, &expr, 0);
+	if ((num == LONG_MAX) || (num <= 0) || (expr == val))
+#	else
+	num = strtoq(val, &expr, 0);
+	if ((num == QUAD_MAX) || (num <= 0) || (expr == val))
+#	endif
+		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);
+}
+
+/*
+ * no_op()
+ *	for those option functions where the archive format has nothing to do.
+ * Return:
+ *	0
+ */
+
+#if __STDC__
+static int
+no_op(void)
+#else
+static int
+no_op()
+#endif
+{
+	return(0);
+}
+
+/*
+ * pax_usage()
+ *	print the usage summary to the user
+ */
+
+#if __STDC__
+void
+pax_usage(void)
+#else
+void
+pax_usage()
+#endif
+{
+	(void)fputs("usage: pax [-cdnv] [-E limit] [-f archive] ", stderr);
+	(void)fputs("[-s replstr] ... [-U user] ...", stderr);
+	(void)fputs("\n           [-G group] ... ", stderr);
+	(void)fputs("[-T [from_date][,to_date]] ... ", stderr);
+	(void)fputs("[pattern ...]\n", stderr);
+	(void)fputs("       pax -r [-cdiknuvDYZ] [-E limit] ", stderr);
+	(void)fputs("[-f archive] [-o options] ... \n", stderr);
+	(void)fputs("           [-p string] ... [-s replstr] ... ", stderr);
+	(void)fputs("[-U user] ... [-G group] ...\n           ", stderr);
+	(void)fputs("[-T [from_date][,to_date]] ... ", stderr);
+	(void)fputs(" [pattern ...]\n", stderr);
+	(void)fputs("       pax -w [-dituvHLPX] [-b blocksize] ", stderr);
+	(void)fputs("[ [-a] [-f archive] ] [-x format] \n", stderr);
+	(void)fputs("           [-B bytes] [-s replstr] ... ", stderr);
+	(void)fputs("[-o options] ... [-U user] ...", stderr);
+	(void)fputs("\n           [-G group] ... ", stderr);
+	(void)fputs("[-T [from_date][,to_date][/[c][m]]] ... ", stderr);
+	(void)fputs("[file ...]\n", stderr);
+	(void)fputs("       pax -r -w [-diklntuvDHLPXYZ] ", stderr);
+	(void)fputs("[-p string] ... [-s replstr] ...", stderr);
+	(void)fputs("\n           [-U user] ... [-G group] ... ", stderr);
+	(void)fputs("[-T [from_date][,to_date][/[c][m]]] ... ", stderr);
+	(void)fputs("\n           [file ...] directory\n", stderr);
+	exit(1);
+}
+
+/*
+ * tar_usage()
+ *	print the usage summary to the user
+ */
+
+#if __STDC__
+void
+tar_usage(void)
+#else
+void
+tar_usage()
+#endif
+{
+	(void)fputs("usage: tar -{txru}[cevfbmopwBHLPX014578] [tapefile] ",
+		 stderr);
+	(void)fputs("[blocksize] file1 file2...\n", stderr);
+	exit(1);
+}
+
+#ifdef notdef
+/*
+ * cpio_usage()
+ *	print the usage summary to the user
+ */
+
+#if __STDC__
+void
+cpio_usage(void)
+#else
+void
+cpio_usage()
+#endif
+{
+	exit(1);
+}
+#endif