blob: 7e046412b7018548d19989642dfef87316b59ef8 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2004-2005 Silicon Graphics, Inc.
* All Rights Reserved.
*/
#include "libxfs.h"
#include "libxlog.h"
#include "logprint.h"
/*
* Extract a log and write it out to a file
*/
void
xfs_log_copy(
struct xlog *log,
int fd,
char *filename)
{
int ofd, r;
xfs_daddr_t blkno;
char buf[XLOG_HEADER_SIZE];
if ((ofd = open(filename, O_CREAT|O_EXCL|O_RDWR|O_TRUNC, 0666)) == -1) {
perror("open");
exit(1);
}
xlog_print_lseek(log, fd, 0, SEEK_SET);
for (blkno = 0; blkno < log->l_logBBsize; blkno++) {
r = read(fd, buf, sizeof(buf));
if (r < 0) {
fprintf(stderr, _("%s: read error (%lld): %s\n"),
__FUNCTION__, (long long)blkno,
strerror(errno));
continue;
} else if (r == 0) {
printf(_("%s: physical end of log at %lld\n"),
__FUNCTION__, (long long)blkno);
break;
} else if (r != sizeof(buf)) {
fprintf(stderr, _("%s: short read? (%lld)\n"),
__FUNCTION__, (long long)blkno);
continue;
}
r = write(ofd, buf, sizeof(buf));
if (r < 0) {
fprintf(stderr, _("%s: write error (%lld): %s\n"),
__FUNCTION__, (long long)blkno,
strerror(errno));
break;
} else if (r != sizeof(buf)) {
fprintf(stderr, _("%s: short write? (%lld)\n"),
__FUNCTION__, (long long)blkno);
continue;
}
}
close(ofd);
}