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/* $OpenBSD: options.c,v 1.115 2024/05/10 20:28:31 millert 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"
static int bad_opt(void);
static int opt_add(const char *);
/*
* 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 */
/*
* 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 */
{ },
/* 10: POSIX PAX */
{ },
#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},
/* 10: POSIX PAX */
{"pax", 5120, BLKMULT, 0, 1, BLKMULT, 0, pax_id, no_op,
ustar_rd, tar_endrd, no_op, pax_wr, tar_endwr, tar_trail,
pax_opt},
#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 */
#ifdef SMALL
# define F_TAR 5 /* default write format when called as tar: ustar */
# define DEFLT 5 /* default write format when called as pax: ustar */
#else
# define F_TAR 10 /* default write format when called as tar: pax */
# define DEFLT 10 /* default write format when called as pax: pax */
#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....
*/
int ford[] = {10, 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);
#ifndef NOCPIO
} else if (strcmp(NM_CPIO, argv0) == 0) {
op_mode = OP_CPIO;
cpio_options(argc, argv);
#endif /* !NOCPIO */
} else {
argv0 = NM_PAX;
op_mode = OP_PAX;
pax_options(argc, argv);
}
/* Line-buffer the file list output as needed. */
if (listf != stderr)
setvbuf(listf, NULL, _IOLBF, 0);
}
/*
* 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:HLOPT: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 '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 nincfiles = 0;
int incfiles_max = 0;
unsigned int i;
unsigned int format = F_TAR;
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:F:HI:LNOPXZ014578")) != -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':
format = F_OTAR;
break;
case 'o':
format = F_OTAR;
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 'F':
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)) {
format = i;
break;
}
paxwarn(1, "Unknown -F format: %s", optarg);
(void)fputs("tar: Known -F 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);
tar_usage();
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 '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 = _PATH_DEFTAPE;
}
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[format];
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;
}
}
static int mkpath(char *);
static int
mkpath(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:LO: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 '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;
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.
*/
static 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
*/
static 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}[014578beFfHhjLmNOoPpqsvwXZz]\n"
" [blocking-factor | format | archive | replstr]\n"
" [-C directory] [-I file] [file ...]\n"
" tar {-crtux} [-014578eHhjLmNOoPpqvwXZz] [-b blocking-factor]\n"
" [-C directory] [-F format] [-f archive] [-I file]\n"
" [-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 */
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