NetBSD/usr.bin/ar/replace.c

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1993-03-21 12:45:37 +03:00
/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Hugh Smith at The University of Guelph.
*
* 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
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/*static char sccsid[] = "from: @(#)replace.c 5.8 (Berkeley) 3/15/91";*/
static char rcsid[] = "$Id: replace.c,v 1.2 1993/08/01 18:18:29 mycroft Exp $";
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#endif /* not lint */
#include <sys/param.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <dirent.h>
#include <errno.h>
#include <unistd.h>
#include <ar.h>
#include <stdio.h>
#include <string.h>
#include "archive.h"
#include "extern.h"
extern CHDR chdr; /* converted header */
extern char *archive; /* archive name */
extern char *tname; /* temporary file "name" */
/*
* replace --
* Replace or add named members to archive. Entries already in the
* archive are swapped in place. Others are added before or after
* the key entry, based on the a, b and i options. If the u option
* is specified, modification dates select for replacement.
*/
replace(argv)
char **argv;
{
extern char *posarg, *posname; /* positioning file name */
register char *file;
register int afd, curfd, mods, sfd;
struct stat sb;
CF cf;
off_t size, tsize;
int err, exists, tfd1, tfd2;
char *rname();
err = 0;
/*
* If doesn't exist, simply append to the archive. There's
* a race here, but it's pretty short, and not worth fixing.
*/
exists = !stat(archive, &sb);
afd = open_archive(O_CREAT|O_RDWR);
if (!exists) {
tfd1 = -1;
tfd2 = tmp();
goto append;
}
tfd1 = tmp(); /* Files before key file. */
tfd2 = tmp(); /* Files after key file. */
/*
* Break archive into two parts -- entries before and after the key
* entry. If positioning before the key, place the key at the
* beginning of the after key entries and if positioning after the
* key, place the key at the end of the before key entries. Put it
* all back together at the end.
*/
mods = (options & (AR_A|AR_B));
for (curfd = tfd1; get_arobj(afd);) {
if (*argv && (file = files(argv))) {
if ((sfd = open(file, O_RDONLY)) < 0) {
err = 1;
(void)fprintf(stderr, "ar: %s: %s.\n",
file, strerror(errno));
goto useold;
}
(void)fstat(sfd, &sb);
if (options & AR_U && sb.st_mtime <= chdr.date)
goto useold;
if (options & AR_V)
(void)printf("r - %s\n", file);
/* Read from disk, write to an archive; pad on write */
SETCF(sfd, file, curfd, tname, WPAD);
put_arobj(&cf, &sb);
(void)close(sfd);
skip_arobj(afd);
continue;
}
if (mods && compare(posname)) {
mods = 0;
if (options & AR_B)
curfd = tfd2;
/* Read and write to an archive; pad on both. */
SETCF(afd, archive, curfd, tname, RPAD|WPAD);
put_arobj(&cf, (struct stat *)NULL);
if (options & AR_A)
curfd = tfd2;
} else {
/* Read and write to an archive; pad on both. */
useold: SETCF(afd, archive, curfd, tname, RPAD|WPAD);
put_arobj(&cf, (struct stat *)NULL);
}
}
if (mods) {
(void)fprintf(stderr, "ar: %s: archive member not found.\n",
posarg);
close_archive(afd);
return(1);
}
/* Append any left-over arguments to the end of the after file. */
append: while (file = *argv++) {
if (options & AR_V)
(void)printf("a - %s\n", file);
if ((sfd = open(file, O_RDONLY)) < 0) {
err = 1;
(void)fprintf(stderr, "ar: %s: %s.\n",
file, strerror(errno));
continue;
}
(void)fstat(sfd, &sb);
/* Read from disk, write to an archive; pad on write. */
SETCF(sfd, file,
options & (AR_A|AR_B) ? tfd1 : tfd2, tname, WPAD);
put_arobj(&cf, &sb);
(void)close(sfd);
}
(void)lseek(afd, (off_t)SARMAG, SEEK_SET);
SETCF(tfd1, tname, afd, archive, NOPAD);
if (tfd1 != -1) {
tsize = size = lseek(tfd1, (off_t)0, SEEK_CUR);
(void)lseek(tfd1, (off_t)0, SEEK_SET);
copy_ar(&cf, size);
} else
tsize = 0;
tsize += size = lseek(tfd2, (off_t)0, SEEK_CUR);
(void)lseek(tfd2, (off_t)0, SEEK_SET);
cf.rfd = tfd2;
copy_ar(&cf, size);
(void)ftruncate(afd, tsize + SARMAG);
close_archive(afd);
return(err);
}