| // 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); |
| } |