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https://github.com/freebsd/freebsd-src
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179 lines
5.3 KiB
C
179 lines
5.3 KiB
C
/*-
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* Copyright (c) 1990, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Hugh Smith at The University of Guelph.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char sccsid[] = "@(#)replace.c 8.3 (Berkeley) 4/2/94";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <ar.h>
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#include <dirent.h>
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#include <err.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include "archive.h"
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#include "extern.h"
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/*
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* replace --
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* Replace or add named members to archive. Entries already in the
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* archive are swapped in place. Others are added before or after
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* the key entry, based on the a, b and i options. If the u option
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* is specified, modification dates select for replacement.
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*/
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int
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replace(argv)
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char **argv;
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{
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char *file;
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int afd, curfd, errflg, exists, mods, sfd, tfd1, tfd2;
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struct stat sb;
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CF cf;
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off_t size, tsize;
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errflg = 0;
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/*
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* If doesn't exist, simply append to the archive. There's
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* a race here, but it's pretty short, and not worth fixing.
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*/
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exists = !stat(archive, &sb);
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afd = open_archive(O_CREAT|O_RDWR);
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if (!exists) {
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tfd1 = -1;
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tfd2 = tmp();
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goto append;
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}
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tfd1 = tmp(); /* Files before key file. */
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tfd2 = tmp(); /* Files after key file. */
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/*
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* Break archive into two parts -- entries before and after the key
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* entry. If positioning before the key, place the key at the
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* beginning of the after key entries and if positioning after the
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* key, place the key at the end of the before key entries. Put it
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* all back together at the end.
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*/
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mods = (options & (AR_A|AR_B));
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for (curfd = tfd1; get_arobj(afd);) {
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if (*argv && (file = files(argv))) {
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if ((sfd = open(file, O_RDONLY)) < 0) {
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errflg = 1;
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warn("%s", file);
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goto useold;
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}
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(void)fstat(sfd, &sb);
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if (options & AR_U && sb.st_mtime <= chdr.date) {
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(void) close(sfd);
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goto useold;
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}
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if (options & AR_V)
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(void)printf("r - %s\n", file);
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/* Read from disk, write to an archive; pad on write */
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SETCF(sfd, file, curfd, tname, WPAD);
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put_arobj(&cf, &sb);
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(void)close(sfd);
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skip_arobj(afd);
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continue;
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}
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if (mods && compare(posname)) {
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mods = 0;
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if (options & AR_B)
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curfd = tfd2;
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/* Read and write to an archive; pad on both. */
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SETCF(afd, archive, curfd, tname, RPAD|WPAD);
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put_arobj(&cf, (struct stat *)NULL);
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if (options & AR_A)
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curfd = tfd2;
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} else {
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/* Read and write to an archive; pad on both. */
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useold: SETCF(afd, archive, curfd, tname, RPAD|WPAD);
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put_arobj(&cf, (struct stat *)NULL);
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}
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}
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if (mods) {
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warnx("%s: archive member not found", posarg);
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close_archive(afd);
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return (1);
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}
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/* Append any left-over arguments to the end of the after file. */
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append: while ( (file = *argv++) ) {
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if (options & AR_V)
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(void)printf("a - %s\n", file);
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if ((sfd = open(file, O_RDONLY)) < 0) {
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errflg = 1;
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warn("%s", file);
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continue;
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}
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(void)fstat(sfd, &sb);
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/* Read from disk, write to an archive; pad on write. */
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SETCF(sfd, file,
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options & (AR_A|AR_B) ? tfd1 : tfd2, tname, WPAD);
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put_arobj(&cf, &sb);
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(void)close(sfd);
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}
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(void)lseek(afd, (off_t)SARMAG, SEEK_SET);
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SETCF(tfd1, tname, afd, archive, NOPAD);
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if (tfd1 != -1) {
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tsize = size = lseek(tfd1, (off_t)0, SEEK_CUR);
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(void)lseek(tfd1, (off_t)0, SEEK_SET);
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copy_ar(&cf, size);
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} else
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tsize = 0;
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tsize += size = lseek(tfd2, (off_t)0, SEEK_CUR);
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(void)lseek(tfd2, (off_t)0, SEEK_SET);
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cf.rfd = tfd2;
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copy_ar(&cf, size);
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(void)ftruncate(afd, tsize + SARMAG);
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close_archive(afd);
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return (errflg);
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}
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