1192d531bf
and compress) to pax when used in tar mode (invoked as 'tar') for compatibility with GNU tar. bzip2 functionality for further GNU tar compatibility will be added at a later date. Note in the manpage that -z is non-standard. Obtained from: OpenBSD Reviewed by: -hackers MFC after: 2 weeks
431 lines
15 KiB
C
431 lines
15 KiB
C
/*-
|
|
* 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 const copyright[] =
|
|
"@(#) Copyright (c) 1992, 1993\n\
|
|
The Regents of the University of California. All rights reserved.\n";
|
|
#endif /* not lint */
|
|
|
|
#ifndef lint
|
|
#if 0
|
|
static char sccsid[] = "@(#)pax.c 8.2 (Berkeley) 4/18/94";
|
|
#endif
|
|
static const char rcsid[] =
|
|
"$FreeBSD$";
|
|
#endif /* not lint */
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/time.h>
|
|
#include <sys/resource.h>
|
|
#include <err.h>
|
|
#include <errno.h>
|
|
#include <locale.h>
|
|
#include <paths.h>
|
|
#include <signal.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include "pax.h"
|
|
#include "extern.h"
|
|
static int gen_init __P((void));
|
|
|
|
/*
|
|
* PAX main routines, general globals and some simple start up routines
|
|
*/
|
|
|
|
/*
|
|
* Variables that can be accessed by any routine within pax
|
|
*/
|
|
int act = DEFOP; /* read/write/append/copy */
|
|
FSUB *frmt = NULL; /* archive format type */
|
|
int cflag; /* match all EXCEPT pattern/file */
|
|
int dflag; /* directory member match only */
|
|
int iflag; /* interactive file/archive rename */
|
|
int kflag; /* do not overwrite existing files */
|
|
int lflag; /* use hard links when possible */
|
|
int nflag; /* select first archive member match */
|
|
int tflag; /* restore access time after read */
|
|
int uflag; /* ignore older modification time files */
|
|
int vflag; /* produce verbose output */
|
|
int Dflag; /* same as uflag except inode change time */
|
|
int Hflag; /* follow command line symlinks (write only) */
|
|
int Lflag; /* follow symlinks when writing */
|
|
int Xflag; /* archive files with same device id only */
|
|
int Yflag; /* same as Dflg except after name mode */
|
|
int Zflag; /* same as uflg except after name mode */
|
|
int vfpart; /* is partial verbose output in progress */
|
|
int patime = 1; /* preserve file access time */
|
|
int pmtime = 1; /* preserve file modification times */
|
|
int pmode; /* preserve file mode bits */
|
|
int pids; /* preserve file uid/gid */
|
|
int exit_val; /* exit value */
|
|
int docrc; /* check/create file crc */
|
|
char *dirptr; /* destination dir in a copy */
|
|
char *argv0; /* root of argv[0] */
|
|
char *tempfile; /* tempfile to use for mkstemp(3) */
|
|
char *tempbase; /* basename of tempfile to use for mkstemp(3) */
|
|
sigset_t s_mask; /* signal mask for cleanup critical sect */
|
|
|
|
/*
|
|
* PAX - Portable Archive Interchange
|
|
*
|
|
* A utility to read, write, and write lists of the members of archive
|
|
* files and copy directory hierarchies. A variety of archive formats
|
|
* are supported (some are described in POSIX 1003.1 10.1):
|
|
*
|
|
* ustar - 10.1.1 extended tar interchange format
|
|
* cpio - 10.1.2 extended cpio interchange format
|
|
* tar - old BSD 4.3 tar format
|
|
* binary cpio - old cpio with binary header format
|
|
* sysVR4 cpio - with and without CRC
|
|
*
|
|
* This version is a superset of IEEE Std 1003.2b-d3
|
|
*
|
|
* Summary of Extensions to the IEEE Standard:
|
|
*
|
|
* 1 READ ENHANCEMENTS
|
|
* 1.1 Operations which read archives will continue to operate even when
|
|
* processing archives which may be damaged, truncated, or fail to meet
|
|
* format specs in several different ways. Damaged sections of archives
|
|
* are detected and avoided if possible. Attempts will be made to resync
|
|
* archive read operations even with badly damaged media.
|
|
* 1.2 Blocksize requirements are not strictly enforced on archive read.
|
|
* Tapes which have variable sized records can be read without errors.
|
|
* 1.3 The user can specify via the non-standard option flag -E if error
|
|
* resync operation should stop on a media error, try a specified number
|
|
* of times to correct, or try to correct forever.
|
|
* 1.4 Sparse files (lseek holes) stored on the archive (but stored with blocks
|
|
* of all zeros will be restored with holes appropriate for the target
|
|
* filesystem
|
|
* 1.5 The user is notified whenever something is found during archive
|
|
* read operations which violates spec (but the read will continue).
|
|
* 1.6 Multiple archive volumes can be read and may span over different
|
|
* archive devices
|
|
* 1.7 Rigidly restores all file attributes exactly as they are stored on the
|
|
* archive.
|
|
* 1.8 Modification change time ranges can be specified via multiple -T
|
|
* options. These allow a user to select files whose modification time
|
|
* lies within a specific time range.
|
|
* 1.9 Files can be selected based on owner (user name or uid) via one or more
|
|
* -U options.
|
|
* 1.10 Files can be selected based on group (group name or gid) via one o
|
|
* more -G options.
|
|
* 1.11 File modification time can be checked against existing file after
|
|
* name modification (-Z)
|
|
*
|
|
* 2 WRITE ENHANCEMENTS
|
|
* 2.1 Write operation will stop instead of allowing a user to create a flawed
|
|
* flawed archive (due to any problem).
|
|
* 2.2 Archives written by pax are forced to strictly conform to both the
|
|
* archive and pax the specific format specifications.
|
|
* 2.3 Blocking size and format is rigidly enforced on writes.
|
|
* 2.4 Formats which may exhibit header overflow problems (they have fields
|
|
* too small for large file systems, such as inode number storage), use
|
|
* routines designed to repair this problem. These techniques still
|
|
* conform to both pax and format specifications, but no longer truncate
|
|
* these fields. This removes any restrictions on using these archive
|
|
* formats on large file systems.
|
|
* 2.5 Multiple archive volumes can be written and may span over different
|
|
* archive devices
|
|
* 2.6 A archive volume record limit allows the user to specify the number
|
|
* of bytes stored on an archive volume. When reached the user is
|
|
* prompted for the next archive volume. This is specified with the
|
|
* non-standard -B flag. The limit is rounded up to the next blocksize.
|
|
* 2.7 All archive padding during write use zero filled sections. This makes
|
|
* it much easier to pull data out of flawed archive during read
|
|
* operations.
|
|
* 2.8 Access time reset with the -t applies to all file nodes (including
|
|
* directories).
|
|
* 2.9 Symbolic links can be followed with -L (optional in the spec).
|
|
* 2.10 Modification or inode change time ranges can be specified via
|
|
* multiple -T options. These allow a user to select files whose
|
|
* modification or inode change time lies within a specific time range.
|
|
* 2.11 Files can be selected based on owner (user name or uid) via one or more
|
|
* -U options.
|
|
* 2.12 Files can be selected based on group (group name or gid) via one o
|
|
* more -G options.
|
|
* 2.13 Symlinks which appear on the command line can be followed (without
|
|
* following other symlinks; -H flag)
|
|
*
|
|
* 3 COPY ENHANCEMENTS
|
|
* 3.1 Sparse files (lseek holes) can be copied without expanding the holes
|
|
* into zero filled blocks. The file copy is created with holes which are
|
|
* appropriate for the target filesystem
|
|
* 3.2 Access time as well as modification time on copied file trees can be
|
|
* preserved with the appropriate -p options.
|
|
* 3.3 Access time reset with the -t applies to all file nodes (including
|
|
* directories).
|
|
* 3.4 Symbolic links can be followed with -L (optional in the spec).
|
|
* 3.5 Modification or inode change time ranges can be specified via
|
|
* multiple -T options. These allow a user to select files whose
|
|
* modification or inode change time lies within a specific time range.
|
|
* 3.6 Files can be selected based on owner (user name or uid) via one or more
|
|
* -U options.
|
|
* 3.7 Files can be selected based on group (group name or gid) via one o
|
|
* more -G options.
|
|
* 3.8 Symlinks which appear on the command line can be followed (without
|
|
* following other symlinks; -H flag)
|
|
* 3.9 File inode change time can be checked against existing file before
|
|
* name modification (-D)
|
|
* 3.10 File inode change time can be checked against existing file after
|
|
* name modification (-Y)
|
|
* 3.11 File modification time can be checked against existing file after
|
|
* name modification (-Z)
|
|
*
|
|
* 4 GENERAL ENHANCEMENTS
|
|
* 4.1 Internal structure is designed to isolate format dependent and
|
|
* independent functions. Formats are selected via a format driver table.
|
|
* This encourages the addition of new archive formats by only having to
|
|
* write those routines which id, read and write the archive header.
|
|
*/
|
|
|
|
/*
|
|
* main()
|
|
* parse options, set up and operate as specified by the user.
|
|
* any operational flaw will set exit_val to non-zero
|
|
* Return: 0 if ok, 1 otherwise
|
|
*/
|
|
|
|
#ifdef __STDC__
|
|
int
|
|
main(int argc, char **argv)
|
|
#else
|
|
int
|
|
main(argc, argv)
|
|
int argc;
|
|
char **argv;
|
|
#endif
|
|
{
|
|
char *tmpdir;
|
|
size_t tdlen;
|
|
|
|
(void) setlocale(LC_ALL, "");
|
|
|
|
/*
|
|
* Where should we put temporary files?
|
|
*/
|
|
if ((tmpdir = getenv("TMPDIR")) == NULL || *tmpdir == '\0')
|
|
tmpdir = _PATH_TMP;
|
|
tdlen = strlen(tmpdir);
|
|
while(tdlen > 0 && tmpdir[tdlen - 1] == '/')
|
|
tdlen--;
|
|
tempfile = malloc(tdlen + 1 + sizeof(_TFILE_BASE));
|
|
if (tempfile == NULL) {
|
|
paxwarn(1, "Cannot allocate memory for temp file name.");
|
|
return(exit_val);
|
|
}
|
|
if (tdlen)
|
|
memcpy(tempfile, tmpdir, tdlen);
|
|
tempbase = tempfile + tdlen;
|
|
*tempbase++ = '/';
|
|
|
|
/*
|
|
* parse options, determine operational mode, general init
|
|
*/
|
|
options(argc, argv);
|
|
if ((gen_init() < 0) || (tty_init() < 0))
|
|
return(exit_val);
|
|
|
|
/*
|
|
* select a primary operation mode
|
|
*/
|
|
switch(act) {
|
|
case EXTRACT:
|
|
extract();
|
|
break;
|
|
case ARCHIVE:
|
|
archive();
|
|
break;
|
|
case APPND:
|
|
if (gzip_program != NULL)
|
|
err(1, "can not gzip while appending");
|
|
append();
|
|
break;
|
|
case COPY:
|
|
copy();
|
|
break;
|
|
default:
|
|
case LIST:
|
|
list();
|
|
break;
|
|
}
|
|
return(exit_val);
|
|
}
|
|
|
|
/*
|
|
* sig_cleanup()
|
|
* when interrupted we try to do whatever delayed processing we can.
|
|
* This is not critical, but we really ought to limit our damage when we
|
|
* are aborted by the user.
|
|
* Return:
|
|
* never....
|
|
*/
|
|
|
|
#ifdef __STDC__
|
|
void
|
|
sig_cleanup(int which_sig)
|
|
#else
|
|
void
|
|
sig_cleanup(which_sig)
|
|
int which_sig;
|
|
#endif
|
|
{
|
|
/*
|
|
* restore modes and times for any dirs we may have created
|
|
* or any dirs we may have read. Set vflag and vfpart so the user
|
|
* will clearly see the message on a line by itself.
|
|
*/
|
|
vflag = vfpart = 1;
|
|
if (which_sig == SIGXCPU)
|
|
paxwarn(0, "Cpu time limit reached, cleaning up.");
|
|
else
|
|
paxwarn(0, "Signal caught, cleaning up.");
|
|
|
|
ar_close();
|
|
proc_dir();
|
|
if (tflag)
|
|
atdir_end();
|
|
exit(1);
|
|
}
|
|
|
|
/*
|
|
* gen_init()
|
|
* general setup routines. Not all are required, but they really help
|
|
* when dealing with a medium to large sized archives.
|
|
*/
|
|
|
|
#ifdef __STDC__
|
|
static int
|
|
gen_init(void)
|
|
#else
|
|
static int
|
|
gen_init()
|
|
#endif
|
|
{
|
|
struct rlimit reslimit;
|
|
struct sigaction n_hand;
|
|
struct sigaction o_hand;
|
|
|
|
/*
|
|
* Really needed to handle large archives. We can run out of memory for
|
|
* internal tables really fast when we have a whole lot of files...
|
|
*/
|
|
if (getrlimit(RLIMIT_DATA , &reslimit) == 0){
|
|
reslimit.rlim_cur = reslimit.rlim_max;
|
|
(void)setrlimit(RLIMIT_DATA , &reslimit);
|
|
}
|
|
|
|
/*
|
|
* should file size limits be waived? if the os limits us, this is
|
|
* needed if we want to write a large archive
|
|
*/
|
|
if (getrlimit(RLIMIT_FSIZE , &reslimit) == 0){
|
|
reslimit.rlim_cur = reslimit.rlim_max;
|
|
(void)setrlimit(RLIMIT_FSIZE , &reslimit);
|
|
}
|
|
|
|
/*
|
|
* increase the size the stack can grow to
|
|
*/
|
|
if (getrlimit(RLIMIT_STACK , &reslimit) == 0){
|
|
reslimit.rlim_cur = reslimit.rlim_max;
|
|
(void)setrlimit(RLIMIT_STACK , &reslimit);
|
|
}
|
|
|
|
/*
|
|
* not really needed, but doesn't hurt
|
|
*/
|
|
if (getrlimit(RLIMIT_RSS , &reslimit) == 0){
|
|
reslimit.rlim_cur = reslimit.rlim_max;
|
|
(void)setrlimit(RLIMIT_RSS , &reslimit);
|
|
}
|
|
|
|
/*
|
|
* signal handling to reset stored directory times and modes. Since
|
|
* we deal with broken pipes via failed writes we ignore it. We also
|
|
* deal with any file size limit thorugh failed writes. Cpu time
|
|
* limits are caught and a cleanup is forced.
|
|
*/
|
|
if ((sigemptyset(&s_mask) < 0) || (sigaddset(&s_mask, SIGTERM) < 0) ||
|
|
(sigaddset(&s_mask,SIGINT) < 0)||(sigaddset(&s_mask,SIGHUP) < 0) ||
|
|
(sigaddset(&s_mask,SIGPIPE) < 0)||(sigaddset(&s_mask,SIGQUIT)<0) ||
|
|
(sigaddset(&s_mask,SIGXCPU) < 0)||(sigaddset(&s_mask,SIGXFSZ)<0)) {
|
|
paxwarn(1, "Unable to set up signal mask");
|
|
return(-1);
|
|
}
|
|
n_hand.sa_mask = s_mask;
|
|
n_hand.sa_flags = 0;
|
|
n_hand.sa_handler = sig_cleanup;
|
|
|
|
if ((sigaction(SIGHUP, &n_hand, &o_hand) < 0) &&
|
|
(o_hand.sa_handler == SIG_IGN) &&
|
|
(sigaction(SIGHUP, &o_hand, &o_hand) < 0))
|
|
goto out;
|
|
|
|
if ((sigaction(SIGTERM, &n_hand, &o_hand) < 0) &&
|
|
(o_hand.sa_handler == SIG_IGN) &&
|
|
(sigaction(SIGTERM, &o_hand, &o_hand) < 0))
|
|
goto out;
|
|
|
|
if ((sigaction(SIGINT, &n_hand, &o_hand) < 0) &&
|
|
(o_hand.sa_handler == SIG_IGN) &&
|
|
(sigaction(SIGINT, &o_hand, &o_hand) < 0))
|
|
goto out;
|
|
|
|
if ((sigaction(SIGQUIT, &n_hand, &o_hand) < 0) &&
|
|
(o_hand.sa_handler == SIG_IGN) &&
|
|
(sigaction(SIGQUIT, &o_hand, &o_hand) < 0))
|
|
goto out;
|
|
|
|
if ((sigaction(SIGXCPU, &n_hand, &o_hand) < 0) &&
|
|
(o_hand.sa_handler == SIG_IGN) &&
|
|
(sigaction(SIGXCPU, &o_hand, &o_hand) < 0))
|
|
goto out;
|
|
|
|
n_hand.sa_handler = SIG_IGN;
|
|
if ((sigaction(SIGPIPE, &n_hand, &o_hand) < 0) ||
|
|
(sigaction(SIGXFSZ, &n_hand, &o_hand) < 0))
|
|
goto out;
|
|
return(0);
|
|
|
|
out:
|
|
syswarn(1, errno, "Unable to set up signal handler");
|
|
return(-1);
|
|
}
|