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ar_subs.c
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ar_subs.c
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/* $OpenBSD: ar_subs.c,v 1.48 2016/08/26 05:06:14 guenther Exp $ */
/* $NetBSD: ar_subs.c,v 1.5 1995/03/21 09:07:06 cgd Exp $ */
/*-
* Copyright (c) 2008, 2011, 2012, 2016
* mirabilos <[email protected]>
* 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_BOTH_TIME_H
#include <sys/time.h>
#include <time.h>
#elif HAVE_SYS_TIME_H
#include <sys/time.h>
#elif HAVE_TIME_H
#include <time.h>
#endif
#include <sys/stat.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <string.h>
#if HAVE_STRINGS_H
#include <strings.h>
#endif
#include <unistd.h>
#include "pax.h"
#include "ftimes.h"
#include "extern.h"
__RCSID("$MirOS: src/bin/pax/ar_subs.c,v 1.20 2018/12/13 07:09:09 tg Exp $");
static void wr_archive(ARCHD *, int is_app);
static int get_arc(void);
static int next_head(ARCHD *);
extern sigset_t s_mask;
/*
* Routines which control the overall operation modes of pax as specified by
* the user: list, append, read ...
*/
static char hdbuf[BLKMULT]; /* space for archive header on read */
u_long flcnt; /* number of files processed */
char ar_do_keepopen = 0; /* see append() below */
/*
* list()
* list the contents of an archive which match user supplied pattern(s)
* (no pattern matches all).
*/
void
list(void)
{
ARCHD *arcn;
int res;
ARCHD archd;
arcn = &archd;
/*
* figure out archive type; pass any format specific options to the
* archive option processing routine; call the format init routine. We
* also save current time for ls_list() so we do not make a system
* call for each file we need to print. If verbose (vflag) start up
* the name and group caches.
*/
if ((get_arc() < 0) || ((*frmt->options)() < 0) ||
((*frmt->st_rd)() < 0))
return;
#if !HAVE_UG_FROM_UGID
if (vflag && ((uidtb_start() < 0) || (gidtb_start() < 0)))
return;
#endif
/*
* step through the archive until the format says it is done
*/
while (next_head(arcn) == 0) {
if (arcn->type == PAX_GLL || arcn->type == PAX_GLF) {
/*
* we need to read, to get the real filename
*/
off_t cnt;
if (!(*frmt->rd_data)(arcn, arcn->type == PAX_GLF
? -1 : -2, &cnt))
(void)rd_skip(cnt + arcn->pad);
continue;
}
/*
* check for pattern, and user specified options match.
* When all patterns are matched we are done.
*/
if ((res = pat_match(arcn)) < 0)
break;
if ((res == 0) && (sel_chk(arcn) == 0)) {
/*
* pattern resulted in a selected file
*/
if (pat_sel(arcn) < 0)
break;
/*
* modify the name as requested by the user if name
* survives modification, do a listing of the file
*/
if ((res = mod_name(arcn)) < 0)
break;
if (res == 0)
ls_list(arcn, stdout);
}
/*
* skip to next archive format header using values calculated
* by the format header read routine
*/
if (rd_skip(arcn->skip + arcn->pad) == 1)
break;
}
/*
* all done, let format have a chance to cleanup, and make sure that
* the patterns supplied by the user were all matched
*/
(void)(*frmt->end_rd)();
(void)sigprocmask(SIG_BLOCK, &s_mask, NULL);
ar_close(0);
pat_chk();
}
static int
cmp_file_times(int mtime_flag, int ctime_flag, ARCHD *arcn, struct stat *sbp)
{
struct stat sb;
if (sbp == NULL) {
if (lstat(arcn->name, &sb) != 0)
return (0);
sbp = &sb;
}
if (ctime_flag && mtime_flag)
return (st_timecmp(m, &arcn->sb, sbp, <=) &&
st_timecmp(c, &arcn->sb, sbp, <=));
else if (ctime_flag)
return (st_timecmp(c, &arcn->sb, sbp, <=));
else
return (st_timecmp(m, &arcn->sb, sbp, <=));
}
/*
* extract()
* extract the member(s) of an archive as specified by user supplied
* pattern(s) (no patterns extracts all members)
*/
void
extract(void)
{
ARCHD *arcn;
int res;
off_t cnt;
ARCHD archd;
int fd;
sltab_start();
arcn = &archd;
/*
* figure out archive type; pass any format specific options to the
* archive option processing routine; call the format init routine;
* start up the directory modification time and access mode database
*/
if ((get_arc() < 0) || ((*frmt->options)() < 0) ||
((*frmt->st_rd)() < 0) || (dir_start() < 0))
return;
/*
* When we are doing interactive rename, we store the mapping of names
* so we can fix up hard links files later in the archive.
*/
if (iflag && (name_start() < 0))
return;
/*
* step through each entry on the archive until the format read routine
* says it is done
*/
while (next_head(arcn) == 0) {
if (arcn->type == PAX_GLL || arcn->type == PAX_GLF) {
/*
* we need to read, to get the real filename
*/
if (!(*frmt->rd_data)(arcn, arcn->type == PAX_GLF
? -1 : -2, &cnt))
(void)rd_skip(cnt + arcn->pad);
continue;
}
/*
* check for pattern, and user specified options match. When
* all the patterns are matched we are done
*/
if ((res = pat_match(arcn)) < 0)
break;
if ((res > 0) || (sel_chk(arcn) != 0)) {
/*
* file is not selected. skip past any file data and
* padding and go back for the next archive member
*/
(void)rd_skip(arcn->skip + arcn->pad);
continue;
}
/*
* with -u or -D only extract when the archive member is newer
* than the file with the same name in the filesystem (no
* test of being the same type is required).
* NOTE: this test is done BEFORE name modifications as
* specified by pax. this operation can be confusing to the
* user who might expect the test to be done on an existing
* file AFTER the name mod. In honesty the pax spec is probably
* flawed in this respect.
*/
if ((uflag || Dflag) &&
cmp_file_times(uflag, Dflag, arcn, NULL)) {
(void)rd_skip(arcn->skip + arcn->pad);
continue;
}
/*
* this archive member is now been selected. modify the name.
*/
if ((pat_sel(arcn) < 0) || ((res = mod_name(arcn)) < 0))
break;
if (res > 0) {
/*
* a bad name mod, skip and purge name from link table
*/
purg_lnk(arcn);
(void)rd_skip(arcn->skip + arcn->pad);
continue;
}
/*
* Non standard -Y and -Z flag. When the existing file is
* same age or newer skip
*/
if ((Yflag || Zflag) &&
cmp_file_times(Yflag, Zflag, arcn, NULL)) {
(void)rd_skip(arcn->skip + arcn->pad);
continue;
}
if (vflag) {
if (vflag > 1)
ls_list(arcn, listf);
else {
(void)safe_print(arcn->name, listf);
vfpart = 1;
}
} else if (Vflag) {
(void)putc('.', listf);
(void)fflush(listf);
vfpart = 1;
}
/*
* if required, chdir around.
*/
if ((arcn->pat != NULL) && (arcn->pat->chdname != NULL))
if (!to_stdout && chdir(arcn->pat->chdname) != 0)
syswarn(1, errno, "Cannot chdir to %s",
arcn->pat->chdname);
/*
* all ok, extract this member based on type
*/
if (!PAX_IS_REG(arcn->type)) {
/*
* process archive members that are not regular files.
* throw out padding and any data that might follow the
* header (as determined by the format).
*/
if (!to_stdout) {
if (PAX_IS_HARDLINK(arcn->type)) {
res = lnk_creat(arcn, &fd);
if (fd != -1)
goto extdata;
}else
res = node_creat(arcn);
}
(void)rd_skip(arcn->skip + arcn->pad);
if (res < 0)
purg_lnk(arcn);
if (vflag && vfpart) {
(void)putc('\n', listf);
vfpart = 0;
}
goto popd;
}
/*
* we have a file with data here. If we cannot create it, skip
* over the data and purge the name from hard link table
*/
if (to_stdout)
fd = STDOUT_FILENO;
else if ((fd = file_creat(arcn)) < 0) {
(void)rd_skip(arcn->skip + arcn->pad);
purg_lnk(arcn);
goto popd;
}
/*
* extract the file from the archive and skip over padding and
* any unprocessed data
*/
extdata:
res = (*frmt->rd_data)(arcn, fd, &cnt);
if (fd != STDOUT_FILENO)
file_close(arcn, fd);
if (vflag && vfpart) {
(void)putc('\n', listf);
vfpart = 0;
}
if (!res)
(void)rd_skip(cnt + arcn->pad);
popd:
/*
* if required, chdir around.
*/
if ((arcn->pat != NULL) && (arcn->pat->chdname != NULL))
if (!to_stdout && fchdir(cwdfd) != 0)
syswarn(1, errno,
"Cannot fchdir to starting directory");
}
/*
* all done, restore directory modes and times as required; make sure
* all patterns supplied by the user were matched; block off signals
* to avoid chance for multiple entry into the cleanup code.
*/
(void)(*frmt->end_rd)();
(void)sigprocmask(SIG_BLOCK, &s_mask, NULL);
ar_close(0);
sltab_process(0);
proc_dir(0);
pat_chk();
}
/*
* wr_archive()
* Write an archive. used in both creating a new archive and appends on
* previously written archive.
*/
static void
wr_archive(ARCHD *arcn, int is_app)
{
int res;
int hlk;
int wr_one;
off_t cnt;
int (*wrf)(ARCHD *);
int fd = -1;
/*
* if this format supports hard link storage, start up the database
* that detects them.
*/
if (((hlk = frmt->hlk) == 1) && (lnk_start() < 0))
return;
/*
* if this is not append, and there are no files, we do not write a
* trailer
*/
wr_one = is_app;
/*
* start up the file traversal code and format specific write
*/
if (ftree_start() < 0) {
if (is_app)
goto trailer;
return;
} else if (((*frmt->st_wr)(is_app) < 0))
return;
wrf = frmt->wr;
/*
* When we are doing interactive rename, we store the mapping of names
* so we can fix up hard links files later in the archive.
*/
if (iflag && (name_start() < 0))
return;
/*
* while there are files to archive, process them one at at time
*/
while (next_file(arcn) == 0) {
/*
* check if this file meets user specified options match.
*/
if (sel_chk(arcn) != 0)
continue;
fd = -1;
if (uflag) {
/*
* only archive if this file is newer than a file with
* the same name that is already stored on the archive
*/
if ((res = chk_ftime(arcn)) < 0)
break;
if (res > 0) {
ftree_skipped_newer();
continue;
}
}
/*
* this file is considered selected now. see if this is a hard
* link to a file already stored
*/
ftree_sel(arcn);
if (hlk && (chk_lnk(arcn) < 0))
break;
if (PAX_IS_REG(arcn->type) || (arcn->type == PAX_HRG)) {
/*
* we will have to read this file. by opening it now we
* can avoid writing a header to the archive for a file
* we were later unable to read (we also purge it from
* the link table).
*/
if ((fd = binopen3(0, arcn->org_name, O_RDONLY, 0)) < 0) {
syswarn(1, errno, "Unable to open %s to read",
arcn->org_name);
purg_lnk(arcn);
continue;
}
}
/*
* Now modify the name as requested by the user
*/
if ((res = mod_name(arcn)) < 0) {
/*
* name modification says to skip this file, close the
* file and purge link table entry
*/
rdfile_close(arcn, &fd);
purg_lnk(arcn);
break;
}
if ((res > 0) || (docrc && (set_crc(arcn, fd) < 0))) {
/*
* unable to obtain the crc we need, close the file,
* purge link table entry
*/
rdfile_close(arcn, &fd);
purg_lnk(arcn);
continue;
}
if (vflag) {
if (vflag > 1)
ls_list(arcn, listf);
else {
(void)safe_print(arcn->name, listf);
vfpart = 1;
}
} else if (Vflag) {
(void)putc('.', listf);
(void)fflush(listf);
vfpart = 1;
}
++flcnt;
/*
* looks safe to store the file, have the format specific
* routine write routine store the file header on the archive
*/
if ((res = (*wrf)(arcn)) < 0) {
rdfile_close(arcn, &fd);
break;
}
wr_one = 1;
if (res > 0) {
/*
* format write says no file data needs to be stored
* so we are done messing with this file
*/
if (vflag && vfpart) {
(void)putc('\n', listf);
vfpart = 0;
}
rdfile_close(arcn, &fd);
continue;
}
/*
* Add file data to the archive, quit on write error. if we
* cannot write the entire file contents to the archive we
* must pad the archive to replace the missing file data
* (otherwise during an extract the file header for the file
* which FOLLOWS this one will not be where we expect it to
* be).
*/
res = (*frmt->wr_data)(arcn, fd, &cnt);
rdfile_close(arcn, &fd);
if (vflag && vfpart) {
(void)putc('\n', listf);
vfpart = 0;
}
if (res < 0)
break;
/*
* pad as required, cnt is number of bytes not written
*/
if (((cnt > 0) && (wr_skip(cnt) < 0)) ||
((arcn->pad > 0) && (wr_skip(arcn->pad) < 0)))
break;
}
trailer:
/*
* tell format to write trailer; pad to block boundary; reset directory
* mode/access times, and check if all patterns supplied by the user
* were matched. block off signals to avoid chance for multiple entry
* into the cleanup code
*/
if (wr_one) {
(*frmt->end_wr)();
wr_fin();
}
(void)sigprocmask(SIG_BLOCK, &s_mask, NULL);
ar_close(0);
if (tflag)
proc_dir(0);
ftree_chk();
}
/*
* append()
* Add file to previously written archive. Archive format specified by the
* user must agree with archive. The archive is read first to collect
* modification times (if -u) and locate the archive trailer. The archive
* is positioned in front of the record with the trailer and wr_archive()
* is called to add the new members.
* PAX IMPLEMENTATION DETAIL NOTE:
* -u is implemented by adding the new members to the end of the archive.
* Care is taken so that these do not end up as links to the older
* version of the same file already stored in the archive. It is expected
* when extraction occurs these newer versions will over-write the older
* ones stored "earlier" in the archive (this may be a bad assumption as
* it depends on the implementation of the program doing the extraction).
* It is really difficult to splice in members without either re-writing
* the entire archive (from the point were the old version was), or having
* assistance of the format specification in terms of a special update
* header that invalidates a previous archive record. The posix spec left
* the method used to implement -u unspecified. This pax is able to
* over write existing files that it creates.
*/
void
append(void)
{
ARCHD *arcn;
int res;
ARCHD archd;
const FSUB *orgfrmt;
int udev;
off_t tlen;
arcn = &archd;
orgfrmt = frmt;
/*
* Do not allow an append operation if the actual archive is of a
* different format than the user specified format.
*/
if (get_arc() < 0)
return;
if ((orgfrmt != NULL) && (orgfrmt != frmt)) {
paxwarn(1, "Cannot mix current archive format %s with %s",
frmt->name, orgfrmt->name);
return;
}
/*
* pass the format any options and start up format
*/
if (((*frmt->options)() < 0) || ((*frmt->st_rd)() < 0))
return;
/* hack to allow appending to Unix Archiver libraries */
if (frmt->is_uar)
ar_do_keepopen = 1;
/*
* if we only are adding members that are newer, we need to save the
* mod times for all files we see.
*/
if (uflag && (ftime_start() < 0))
return;
/*
* some archive formats encode hard links by recording the device and
* file serial number (inode) but copy the file anyway (multiple times)
* to the archive. When we append, we run the risk that newly added
* files may have the same device and inode numbers as those recorded
* on the archive but during a previous run. If this happens, when the
* archive is extracted we get INCORRECT hard links. We avoid this by
* remapping the device numbers so that newly added files will never
* use the same device number as one found on the archive. remapping
* allows new members to safely have links among themselves. remapping
* also avoids problems with file inode (serial number) truncations
* when the inode number is larger than storage space in the archive
* header. See the remap routines for more details.
*/
if ((udev = frmt->udev) && (dev_start() < 0))
return;
/*
* reading the archive may take a long time. If verbose tell the user
*/
if (vflag) {
(void)fprintf(listf,
"%s: Reading archive to position at the end...", argv0);
vfpart = 1;
}
/*
* step through the archive until the format says it is done
*/
while (next_head(arcn) == 0) {
/*
* check if this file meets user specified options.
*/
if (sel_chk(arcn) != 0) {
if (rd_skip(arcn->skip + arcn->pad) == 1)
break;
continue;
}
if (uflag) {
/*
* see if this is the newest version of this file has
* already been seen, if so skip.
*/
if ((res = chk_ftime(arcn)) < 0)
break;
if (res > 0) {
if (rd_skip(arcn->skip + arcn->pad) == 1)
break;
continue;
}
}
/*
* Store this device number. Device numbers seen during the
* read phase of append will cause newly appended files with a
* device number seen in the old part of the archive to be
* remapped to an unused device number.
*/
if ((udev && (add_dev(arcn) < 0)) ||
(rd_skip(arcn->skip + arcn->pad) == 1))
break;
}
/*
* done, finish up read and get the number of bytes to back up so we
* can add new members. The format might have used the hard link table,
* purge it.
*/
tlen = (*frmt->end_rd)();
lnk_end();
/*
* try to position for write, if this fails quit. if any error occurs,
* we will refuse to write
*/
if (appnd_start(tlen) < 0)
return;
/*
* tell the user we are done reading.
*/
if (vflag && vfpart) {
(void)fputs("done.\n", listf);
vfpart = 0;
}
/*
* go to the writing phase to add the new members
*/
wr_archive(arcn, 1);
}
/*
* archive()
* write a new archive
*/
void
archive(void)
{
ARCHD archd;
/*
* if we only are adding members that are newer, we need to save the
* mod times for all files; set up for writing; pass the format any
* options write the archive
*/
if ((uflag && (ftime_start() < 0)) || (wr_start() < 0))
return;
if ((*frmt->options)() < 0)
return;
wr_archive(&archd, 0);
}
/*
* copy()
* copy files from one part of the filesystem to another. this does not
* use any archive storage. The EFFECT OF THE COPY IS THE SAME as if an
* archive was written and then extracted in the destination directory
* (except the files are forced to be under the destination directory).
*/
void
copy(void)
{
ARCHD *arcn;
int res;
int fddest;
char *dest_pt;
size_t dlen;
size_t drem;
int fdsrc = -1;
struct stat sb;
ARCHD archd;
char dirbuf[PAXPATHLEN+1];
sltab_start();
arcn = &archd;
/*
* set up the destination dir path and make sure it is a directory. We
* make sure we have a trailing / on the destination
*/
dlen = strlcpy(dirbuf, dirptr, sizeof(dirbuf));
if (dlen >= sizeof(dirbuf) ||
(dlen == sizeof(dirbuf) - 1 && dirbuf[dlen - 1] != '/')) {
paxwarn(1, "directory name is too long %s", dirptr);
return;
}
dest_pt = dirbuf + dlen;
if (*(dest_pt-1) != '/') {
*dest_pt++ = '/';
*dest_pt = '\0';
++dlen;
}
drem = PAXPATHLEN - dlen;
if (stat(dirptr, &sb) < 0) {
syswarn(1, errno, "Cannot access destination directory %s",
dirptr);
return;
}
if (!S_ISDIR(sb.st_mode)) {
paxwarn(1, "Destination is not a directory %s", dirptr);
return;
}
/*
* start up the hard link table; file traversal routines and the
* modification time and access mode database
*/
if ((lnk_start() < 0) || (ftree_start() < 0) || (dir_start() < 0))
return;
/*
* When we are doing interactive rename, we store the mapping of names
* so we can fix up hard links files later in the archive.
*/
if (iflag && (name_start() < 0))
return;
/*
* set up to cp file trees
*/
cp_start();
/*
* while there are files to archive, process them
*/
while (next_file(arcn) == 0) {
fdsrc = -1;
/*
* check if this file meets user specified options
*/
if (sel_chk(arcn) != 0)
continue;
/*
* if there is already a file in the destination directory with
* the same name and it is newer, skip the one stored on the
* archive.
* NOTE: this test is done BEFORE name modifications as
* specified by pax. this can be confusing to the user who
* might expect the test to be done on an existing file AFTER
* the name mod. In honesty the pax spec is probably flawed in
* this respect
*/
if (uflag || Dflag) {
/*
* create the destination name
*/
if (strlcpy(dest_pt, arcn->name + (*arcn->name == '/'),
drem + 1) > drem) {
paxwarn(1, "Destination pathname too long %s",
arcn->name);
continue;
}
/*
* if existing file is same age or newer skip
*/
res = lstat(dirbuf, &sb);
*dest_pt = '\0';
if (res == 0) {
ftree_skipped_newer();
if (cmp_file_times(uflag, Dflag, arcn, &sb))
continue;
}
}
/*
* this file is considered selected. See if this is a hard link
* to a previous file; modify the name as requested by the
* user; set the final destination.
*/
ftree_sel(arcn);
if ((chk_lnk(arcn) < 0) || ((res = mod_name(arcn)) < 0))
break;
if ((res > 0) || (set_dest(arcn, dirbuf, dlen) < 0)) {
/*
* skip file, purge from link table
*/
purg_lnk(arcn);
continue;
}
/*
* Non standard -Y and -Z flag. When the existing file is
* same age or newer skip
*/
if ((Yflag || Zflag) &&
cmp_file_times(Yflag, Zflag, arcn, NULL))
continue;
if (vflag) {
(void)safe_print(arcn->name, listf);
vfpart = 1;
} else if (Vflag) {
(void)putc('.', listf);
(void)fflush(listf);
vfpart = 1;
}
++flcnt;
/*
* try to create a hard link to the src file if requested
* but make sure we are not trying to overwrite ourselves.
*/
if (lflag)
res = cross_lnk(arcn);
else
res = chk_same(arcn);
if (res <= 0) {
if (vflag && vfpart) {
(void)putc('\n', listf);
vfpart = 0;
}
continue;
}
/*
* have to create a new file
*/
if (!PAX_IS_REG(arcn->type)) {
/*
* create a link or special file
*/
if (PAX_IS_HARDLINK(arcn->type))
res = lnk_creat(arcn, NULL);
else
res = node_creat(arcn);
if (res < 0)
purg_lnk(arcn);
if (vflag && vfpart) {
(void)putc('\n', listf);
vfpart = 0;
}
continue;
}
/*
* have to copy a regular file to the destination directory.
* first open source file and then create the destination file
*/
if ((fdsrc = binopen3(0, arcn->org_name, O_RDONLY, 0)) < 0) {
syswarn(1, errno, "Unable to open %s to read",
arcn->org_name);
purg_lnk(arcn);
continue;
}
if ((fddest = file_creat(arcn)) < 0) {
rdfile_close(arcn, &fdsrc);
purg_lnk(arcn);
continue;
}
/*
* copy source file data to the destination file
*/
cp_file(arcn, fdsrc, fddest);
file_close(arcn, fddest);
rdfile_close(arcn, &fdsrc);
if (vflag && vfpart) {
(void)putc('\n', listf);
vfpart = 0;
}
}
/*
* restore directory modes and times as required; make sure all
* patterns were selected block off signals to avoid chance for
* multiple entry into the cleanup code.
*/
(void)sigprocmask(SIG_BLOCK, &s_mask, NULL);
ar_close(0);
sltab_process(0);
proc_dir(0);
ftree_chk();
}
/*
* next_head()
* try to find a valid header in the archive. Uses format specific
* routines to extract the header and id the trailer. Trailers may be
* located within a valid header or in an invalid header (the location
* is format specific. The inhead field from the option table tells us
* where to look for the trailer).