diff options
Diffstat (limited to 'bin/pax/pax.c')
| -rw-r--r-- | bin/pax/pax.c | 492 |
1 files changed, 0 insertions, 492 deletions
diff --git a/bin/pax/pax.c b/bin/pax/pax.c deleted file mode 100644 index 3906569..0000000 --- a/bin/pax/pax.c +++ /dev/null @@ -1,492 +0,0 @@ -/* $NetBSD: pax.c,v 1.48 2017/10/02 21:55:35 joerg 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. - */ - -#if HAVE_NBTOOL_CONFIG_H -#include "nbtool_config.h" -#endif - -#include <sys/cdefs.h> -#if !defined(lint) -__COPYRIGHT("@(#) Copyright (c) 1992, 1993\ - The Regents of the University of California. All rights reserved."); -#if 0 -static char sccsid[] = "@(#)pax.c 8.2 (Berkeley) 4/18/94"; -#else -__RCSID("$NetBSD: pax.c,v 1.48 2017/10/02 21:55:35 joerg Exp $"); -#endif -#endif /* not lint */ - -#include <sys/param.h> -#include <sys/resource.h> -#include <sys/stat.h> -#include <sys/time.h> -#include <errno.h> -#include <fcntl.h> -#include <paths.h> -#include <signal.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <time.h> -#include <unistd.h> -#include <util.h> -#include "pax.h" -#include "extern.h" -static int gen_init(void); - -/* - * PAX main routines, general globals and some simple start up routines - */ - -/* - * Variables that can be accessed by any routine within pax - */ -int act = ERROR; /* read/write/append/copy */ -FSUB *frmt = NULL; /* archive format type */ -int cflag; /* match all EXCEPT pattern/file */ -int cwdfd = -1; /* starting cwd */ -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 Aflag; /* honor absolute path */ -int Dflag; /* same as uflag except inode change time */ -int Hflag; /* follow command line symlinks (write only) */ -int Lflag; /* follow symlinks when writing */ -int Mflag; /* treat stdin as an mtree(8) specfile */ -int Vflag; /* produce somewhat verbose output (no listing) */ -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 nodirs; /* do not create directories as needed */ -int pfflags = 1; /* preserve file flags */ -int pmode; /* preserve file mode bits */ -int pids; /* preserve file uid/gid */ -int rmleadslash = 0; /* remove leading '/' from pathnames */ -int exit_val; /* exit value */ -int docrc; /* check/create file crc */ -int to_stdout; /* extract to stdout */ -char *dirptr; /* destination dir in a copy */ -char *ltmfrmt; /* -v locale time format (if any) */ -const char *argv0; /* root of argv[0] */ -sigset_t s_mask; /* signal mask for cleanup critical sect */ -FILE *listf; /* file pointer to print file list to */ -char *tempfile; /* tempfile to use for mkstemp(3) */ -char *tempbase; /* basename of tempfile to use for mkstemp(3) */ -int forcelocal; /* force local operation even if the name - * contains a : - */ -int secure = 1; /* don't extract names that contain .. */ - -/* - * 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 - */ - -int -main(int argc, char **argv) -{ - const char *tmpdir; - size_t tdlen; - int rval; - - setprogname(argv[0]); - - listf = stderr; - - /* - * parse options, determine operational mode - */ - options(argc, argv); - - /* - * general init - */ - if ((gen_init() < 0) || (tty_init() < 0)) - return exit_val; - - /* - * Keep a reference to cwd, so we can always come back home. - */ - cwdfd = open(".", O_RDONLY); - if (cwdfd < 0) { - syswarn(1, errno, "Can't open current working directory."); - return exit_val; - } - if (updatepath() == -1) - return exit_val; - - /* - * 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) { - tty_warn(1, "Cannot allocate memory for temp file name."); - return exit_val; - } - if (tdlen) - memcpy(tempfile, tmpdir, tdlen); - tempbase = tempfile + tdlen; - *tempbase++ = '/'; - - (void)time(&starttime); -#ifdef SIGINFO - (void)signal(SIGINFO, ar_summary); -#endif - /* - * select a primary operation mode - */ - switch (act) { - case EXTRACT: - rval = extract(); - break; - case ARCHIVE: - rval = archive(); - break; - case APPND: - if (gzip_program != NULL) - err(1, "cannot gzip while appending"); - rval = append(); - /* - * Check if we tried to append on an empty file and - * turned into ARCHIVE mode. - */ - if (act == -ARCHIVE) { - act = ARCHIVE; - rval = archive(); - } - break; - case COPY: - rval = copy(); - break; - default: - case LIST: - rval = list(); - break; - } - if (rval != 0) - exit_val = 1; - 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.... - */ - -__dead static void -sig_cleanup(int which_sig) -{ - /* - * 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; -#ifdef SIGXCPU - if (which_sig == SIGXCPU) - tty_warn(1, "CPU time limit reached, cleaning up."); - else -#endif - tty_warn(1, "Signal caught, cleaning up."); - - /* delete any open temporary file */ - if (xtmp_name) - (void)unlink(xtmp_name); - ar_close(); - proc_dir(); - if (tflag) - atdir_end(); - - (void)raise_default_signal(which_sig); - exit(1); -} - -/* - * gen_init() - * general setup routines. Not all are required, but they really help - * when dealing with a medium to large sized archives. - */ - -static int -gen_init(void) -{ - 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); - } - -#ifdef RLIMIT_RSS - /* - * not really needed, but doesn't hurt - */ - if (getrlimit(RLIMIT_RSS , &reslimit) == 0){ - reslimit.rlim_cur = reslimit.rlim_max; - (void)setrlimit(RLIMIT_RSS , &reslimit); - } -#endif - - /* - * Handle posix locale - * - * set user defines time printing format for -v option - */ - ltmfrmt = getenv("LC_TIME"); - - /* - * 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 through 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)){ - tty_warn(1, "Unable to set up signal mask"); - return -1; - } -#ifdef SIGXCPU - if (sigaddset(&s_mask,SIGXCPU) < 0) { - tty_warn(1, "Unable to set up signal mask"); - return -1; - } -#endif -#ifdef SIGXFSZ - if (sigaddset(&s_mask,SIGXFSZ) < 0) { - tty_warn(1, "Unable to set up signal mask"); - return -1; - } -#endif - - memset(&n_hand, 0, sizeof n_hand); - 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; - -#ifdef SIGXCPU - if ((sigaction(SIGXCPU, &n_hand, &o_hand) < 0) && - (o_hand.sa_handler == SIG_IGN) && - (sigaction(SIGXCPU, &o_hand, &o_hand) < 0)) - goto out; -#endif - n_hand.sa_handler = SIG_IGN; - if (sigaction(SIGPIPE, &n_hand, &o_hand) < 0) - goto out; -#ifdef SIGXFSZ - if (sigaction(SIGXFSZ, &n_hand, &o_hand) < 0) - goto out; -#endif - return 0; - - out: - syswarn(1, errno, "Unable to set up signal handler"); - return -1; -} |