/
options.c
2176 lines (2048 loc) · 44.8 KB
/
options.c
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/* $OpenBSD: options.c,v 1.102 2018/09/13 12:33:43 millert Exp $ */
/* $NetBSD: options.c,v 1.6 1996/03/26 23:54:18 mrg Exp $ */
/*-
* Copyright (c) 2005, 2006, 2007, 2009, 2011, 2012, 2014, 2016,
* 2019, 2020
* mirabilos <m@mirbsd.org>
* 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>
#if HAVE_SYS_MTIO_H
#include <sys/mtio.h>
#endif
#include <sys/stat.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#if HAVE_PATHS_H
#include <paths.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if HAVE_STRINGS_H
#include <strings.h>
#endif
#include <unistd.h>
#define EXTERN
#include "pax.h"
#include "ar.h"
#include "cpio.h"
#include "tar.h"
#include "extern.h"
__RCSID("$MirOS: src/bin/pax/options.c,v 1.76 2021/10/03 20:48:06 tg Exp $");
#ifndef _PATH_DEFTAPE
#define _PATH_DEFTAPE "/dev/rmt0"
#endif
#define NELEM(a) (sizeof(a) / sizeof((a)[0]))
#define SELEM(a) (sizeof((a)[0]))
/*
* 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 */
#ifndef SMALL
static int no_op(void);
static int no_op_i(int);
#endif
static int mkpath(char *);
static void process_M(const char *, void (*)(void));
static void printflg(unsigned int);
static int c_frmt(const void *, const void *);
static off_t str_offt(char *);
static void pax_options(int, char **);
static void pax_usage(void) MKSH_A_NORETURN;
static void tar_set_action(int);
static void tar_options(int, char **);
static void tar_usage(void) MKSH_A_NORETURN;
static void cpio_set_action(int);
static void cpio_options(int, char **);
static void cpio_usage(void) MKSH_A_NORETURN;
#ifndef SMALL
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);
#endif
/* command to run as gzip */
static const char GZIP_CMD[] = "gzip";
#ifndef SMALL
/* command to run as compress */
static const char COMPRESS_CMD[] = "compress";
/* command to run as bzip2 */
static const char BZIP2_CMD[] = "bzip2";
/* command to run as lzma and xz */
static const char XZ_CMD[] = "xz";
/* command used for creating lzma archives */
static const char LZMA_WRCMD[] = "lzma";
/* command to run as lzop */
static const char LZOP_CMD[] = "lzop";
#endif
/* used as flag value */
#define COMPRESS_GUESS_CMD ((const void *)&compress_program)
/*
* Format specific routine table, MUST be in sorted order
* and MUST match enum fsub_order in pax.h
* (see pax.h for description of each function)
*
* name, blksz, hdsz, udev, hlk, blkagn, id, st_read,
* read, end_read, st_write, write, end_write, trail,
* rd_data, wr_data, options, inhead, is_uar
*/
const FSUB fsub[] = {
#ifndef SMALL
/* FSUB_AR: UNIX ARCHIVER */
{"ar", 512, sizeof(HD_AR), 0, 0, 0, uar_id, no_op,
uar_rd, uar_endrd, uar_stwr, uar_wr, no_op, uar_trail,
rd_wrfile, uar_wr_data, bad_opt, 0, 1},
/* FSUB_BCPIO: OLD BINARY CPIO */
{"bcpio", 5120, sizeof(HD_BCPIO), 1, 0, 0, bcpio_id, cpio_strd,
bcpio_rd, bcpio_endrd, cpio_stwr, bcpio_wr, cpio_endwr, cpio_trail,
rd_wrfile, wr_rdfile, bad_opt, 1, 0},
#endif
/* FSUB_CPIO: OLD OCTAL CHARACTER CPIO */
{"cpio", 5120, sizeof(HD_CPIO), 1, 0, 0, cpio_id, cpio_strd,
cpio_rd, cpio_endrd, cpio_stwr, cpio_wr, cpio_endwr, cpio_trail,
rd_wrfile, wr_rdfile, bad_opt, 1, 0},
#ifndef SMALL
/* FSUB_DIST: OLD OCTAL CHARACTER CPIO, UID/GID CLEARED (ANONYMISED) */
{"dist", 512, sizeof(HD_CPIO), 1, 0, 0, cpio_id, cpio_strd,
cpio_rd, cpio_endrd, dist_stwr, cpio_wr, cpio_endwr, cpio_trail,
rd_wrfile, wr_rdfile, bad_opt, 1, 0},
#endif
/* FSUB_SV4CPIO: SVR4 HEX CPIO */
{"sv4cpio", 5120, sizeof(HD_VCPIO), 1, 0, 0, vcpio_id, cpio_strd,
vcpio_rd, vcpio_endrd, cpio_stwr, vcpio_wr, cpio_endwr, cpio_trail,
rd_wrfile, wr_rdfile, bad_opt, 1, 0},
/* FSUB_SV4CRC: SVR4 HEX CPIO WITH CRC */
{"sv4crc", 5120, sizeof(HD_VCPIO), 1, 0, 0, crc_id, crc_strd,
vcpio_rd, vcpio_endrd, crc_stwr, vcpio_wr, cpio_endwr, cpio_trail,
rd_wrfile, wr_rdfile, bad_opt, 1, 0},
#ifndef SMALL
/* FSUB_TAR: OLD TAR */
{"tar", 10240, BLKMULT, 0, 1, BLKMULT, tar_id, no_op,
tar_rd, tar_endrd, no_op_i, tar_wr, tar_endwr, tar_trail,
rd_wrfile, wr_rdfile, tar_opt, 0, 0},
#endif
/* FSUB_USTAR: POSIX USTAR */
{"ustar", 10240, BLKMULT, 0, 1, BLKMULT, ustar_id, ustar_strd,
ustar_rd, tar_endrd, ustar_stwr, ustar_wr, tar_endwr, tar_trail,
rd_wrfile, wr_rdfile, tar_opt, 0, 0},
#ifndef SMALL
/* FSUB_V4NORM: SVR4 HEX CPIO WITH CRC, UID/GID/MTIME CLEARED (NORMALISED) */
{"v4norm", 512, sizeof(HD_VCPIO), 1, 0, 0, crc_id, crc_strd,
vcpio_rd, vcpio_endrd, v4norm_stwr, vcpio_wr, cpio_endwr, cpio_trail,
rd_wrfile, wr_rdfile, bad_opt, 1, 0},
/* FSUB_V4ROOT: SVR4 HEX CPIO WITH CRC, UID/GID CLEARED (ANONYMISED) */
{"v4root", 512, sizeof(HD_VCPIO), 1, 0, 0, crc_id, crc_strd,
vcpio_rd, vcpio_endrd, v4root_stwr, vcpio_wr, cpio_endwr, cpio_trail,
rd_wrfile, wr_rdfile, bad_opt, 1, 0},
/* FSUBFAIL_Z: compress, to detect failure to use -Z */
{NULL, 0, 4, 0, 0, 0, compress_id, NULL,
NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, 0, 0},
/* FSUBFAIL_XZ: xz, to detect failure to decompress it */
{NULL, 0, 6, 0, 0, 0, xz_id, NULL,
NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, 0, 0},
/* FSUBFAIL_BZ2: bzip2, to detect failure to use -j */
{NULL, 0, 4, 0, 0, 0, bzip2_id, NULL,
NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, 0, 0},
/* FSUBFAIL_GZ: gzip, to detect failure to use -z */
{NULL, 0, 4, 0, 0, 0, gzip_id, NULL,
NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, 0, 0},
#endif
};
/*
* 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....
*/
const unsigned char ford[] = {
FSUB_USTAR,
#ifndef SMALL
FSUB_TAR,
FSUBFAIL_GZ,
FSUBFAIL_BZ2,
FSUBFAIL_XZ,
FSUBFAIL_Z,
#endif
FSUB_SV4CRC,
FSUB_SV4CPIO,
FSUB_CPIO,
#ifndef SMALL
FSUB_BCPIO,
#endif
FSUB_MAX
};
/* normalise archives */
int anonarch = 0;
/* extract to standard output */
char to_stdout = 0;
/*
* Do we have -C anywhere and what is it?
*/
char 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)
{
size_t n;
/*
* Are we acting like pax, tar or cpio (based on argv[0])
*/
n = strlen(argv[0]);
if (n >= 3 && !strcmp(argv[0] + (n - 3), NM_TAR)) {
argv0 = NM_TAR;
op_mode = OP_TAR;
tar_options(argc, argv);
} else if (n >= 4 && !strcmp(argv[0] + (n - 4), NM_CPIO)) {
argv0 = NM_CPIO;
op_mode = OP_CPIO;
cpio_options(argc, argv);
} else {
/* assume pax as the default */
argv0 = NM_PAX;
op_mode = OP_PAX;
pax_options(argc, argv);
}
}
static int
gather_format(FSUB *fp, const char *name, int flag)
{
size_t i;
if ((frmt = (const FSUB *)bsearch((const void *)fp, (const void *)fsub,
NELEM(fsub), SELEM(fsub), c_frmt)) != NULL)
return (0);
paxwarn(1, "Unknown -%c format: %s", flag, optarg);
fprintf(stderr, "%s: Known -%c formats are:", name, flag);
for (i = 0; i < NELEM(fsub); ++i)
if (fsub[i].name != NULL)
fprintf(stderr, " %s", fsub[i].name);
fputs("\n\n", stderr);
return (1);
}
/*
* 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 int flg = 0;
unsigned int bflg = 0;
const char *errstr;
char *pt;
FSUB tmp;
/*
* process option flags
*/
while ((c = getopt(argc, argv,
"0aB:b:cDdE:f:G:HiJjkLlM:nOo:Pp:rs:T:tU:uvwXx:YZz")) != -1) {
switch (c) {
case '0':
/*
* Use \0 as pathname terminator.
* (For use with the -print0 option of find(1).)
*/
zeroflag = 1;
flg |= C0F;
break;
case 'a':
/*
* append
*/
flg |= AF;
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 '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':
/*
* On extraction check file inode change time before the
* modification of the file name. Non standard option.
*/
Dflag = 1;
flg |= CDF;
break;
case 'd':
/*
* match only dir on extract, not the subtree at dir
*/
dflag = 1;
flg |= DF;
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 'f':
/*
* filename where the archive is stored
*/
arcname = optarg;
flg |= FF;
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 'i':
/*
* interactive file rename
*/
iflag = 1;
flg |= IF;
break;
#ifndef SMALL
case 'J':
/*
* use xz (non-standard option)
*/
compress_program = XZ_CMD;
break;
case 'j':
/*
* use bzip2 (non-standard option)
*/
compress_program = BZIP2_CMD;
break;
#endif
case 'k':
/*
* do not clobber files that exist
*/
kflag = 1;
flg |= KF;
break;
case 'L':
/*
* follow symlinks
*/
Lflag = 1;
flg |= CLF;
break;
case 'l':
/*
* try to link src to dest with copy (-rw)
*/
lflag = 1;
flg |= LF;
break;
case 'M':
/*
* MirOS extension: archive normaliser
*/
process_M(optarg, pax_usage);
break;
case 'n':
/*
* select first match for a pattern only
*/
nflag = 1;
flg |= NF;
break;
case 'O':
/*
* Force one volume. Non standard option.
*/
force_one_volume = 1;
break;
case 'o':
/*
* pass format specific options
*/
flg |= OF;
if (opt_add(optarg) < 0)
pax_usage();
break;
case 'P':
/*
* do NOT follow symlinks (default)
*/
Lflag = 0;
flg |= CPF;
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':
/*
* 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 't':
/*
* preserve access time on filesystem nodes we read
*/
tflag = 1;
flg |= TF;
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 'u':
/*
* ignore those older files
*/
uflag = 1;
flg |= UF;
break;
case 'v':
/*
* verbose operation mode
*/
++vflag;
flg |= VF;
break;
case 'w':
/*
* write an archive
*/
flg |= WF;
break;
case 'X':
/*
* do not pass over mount points in the filesystem
*/
Xflag = 1;
flg |= CXF;
break;
case 'x':
/*
* specify an archive format on write
*/
tmp.name = optarg;
if (gather_format(&tmp, "pax", 'x'))
pax_usage();
flg |= XF;
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 'z':
/*
* use gzip (non-standard option)
*/
compress_program = GZIP_CMD;
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[FSUB_USTAR]);
/*
* 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];
/* FALLTHROUGH */
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_set_action(int op)
{
if (act != ERROR && act != op)
tar_usage();
act = op;
}
static void
tar_options(int argc, char **argv)
{
int c;
int Oflag = FSUB_USTAR;
int nincfiles = 0;
int incfiles_max = 0;
struct incfile {
char *file;
char *dir;
};
struct incfile *incfiles = NULL;
FSUB tmp;
char *bp, *cp;
/*
* Set default values.
*/
rmleadslash = 1;
/*
* process option flags
*/
while ((c = getoldopt(argc, argv,
"014578AaBb:C:cD:ef:HhI:JjLM:mNOoPpqRrSs:tuvwXxZz")) != -1) {
switch (c) {
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;
#ifndef SMALL
case 'A':
Oflag = FSUB_AR;
mircpio_deprecated("-A flag", "-D ar");
break;
#endif
case 'a':
/*
* use compression dependent on arcname
* (non-standard option, gtar extension)
*/
compress_program = COMPRESS_GUESS_CMD;
break;
case 'B':
/*
* Nothing to do here, this is pax default
*/
break;
case 'b':
/*
* specify blocksize in 512-byte blocks
*/
if ((wrblksz = (int)str_offt(optarg)) <= 0) {
paxwarn(1, "Invalid block size %s", optarg);
tar_usage();
}
/* XXX - check for integer overflow */
wrblksz *= 512;
break;
case 'C':
havechd++;
chdname = optarg;
break;
case 'c':
/*
* create an archive
*/
tar_set_action(ARCHIVE);
break;
case 'D':
/*
* specify archive format and options
*/
if (!(bp = strdup(optarg))) {
paxwarn(0, "out of memory");
exit(1);
}
if ((cp = strchr(bp, ',')))
*cp++ = '\0';
tmp.name = bp;
if (gather_format(&tmp, "tar", 'D'))
tar_usage();
if (cp && opt_add(cp) < 0)
tar_usage();
free(bp);
Oflag = -666; /* "frmt already set" */
break;
case 'e':
/*
* stop after first error
*/
maxflt = 0;
break;
case 'f':
/*
* filename where the archive is stored
*/
arcname = optarg;
break;
case 'H':
/*
* follow command line symlinks only
*/
Hflag = 1;
break;
case 'h':
/*
* follow symlinks
*/
Lflag = 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;
#ifndef SMALL
case 'J':
/*
* use xz (non-standard option)
*/
compress_program = XZ_CMD;
break;
case 'j':
/*
* use bzip2 (non-standard option)
*/
compress_program = BZIP2_CMD;
break;
#endif
case 'L':
/*
* follow symlinks
*/
Lflag = 1;
break;
case 'M':
/*
* MirOS extension: archive normaliser
*/
process_M(optarg, tar_usage);
break;
case 'm':
/*
* do not preserve modification time
*/
pmtime = 0;
break;
#ifndef SMALL
case 'N':
/* numeric uid and gid only */
anonarch |= ANON_NUMID;
mircpio_deprecated("-N flag", "-M numid");
break;
#endif
case 'O':
#ifndef SMALL
Oflag = FSUB_TAR;
#else
Oflag = FSUB_MAX;
#endif
to_stdout = 2;
break;
#ifndef SMALL
case 'o':
Oflag = FSUB_TAR;