/*- * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 2003-2007 Tim Kientzle * Copyright (c) 2012 Michihiro NAKAJIMA * All rights reserved. */ #include "bsdtar_platform.h" #ifdef HAVE_SYS_TYPES_H #include #endif #ifdef HAVE_SYS_STAT_H #include #endif #if HAVE_SYS_XATTR_H #include #elif HAVE_ATTR_XATTR_H #include #endif #ifdef HAVE_ERRNO_H #include #endif #ifdef HAVE_FCNTL_H #include #endif #ifdef HAVE_GRP_H #include #endif #ifdef HAVE_IO_H #include #endif #ifdef HAVE_LIBGEN_H #include #endif #ifdef HAVE_LIMITS_H #include #endif #ifdef HAVE_PATHS_H #include #endif #ifdef HAVE_PWD_H #include #endif #ifdef HAVE_STDINT_H #include #endif #include #ifdef HAVE_STDLIB_H #include #endif #ifdef HAVE_STRING_H #include #endif #ifdef HAVE_UNISTD_H #include #endif #include "bsdtar.h" #include "err.h" #include "line_reader.h" #ifndef O_BINARY #define O_BINARY 0 #endif struct archive_dir_entry { struct archive_dir_entry *next; time_t mtime_sec; int mtime_nsec; char *name; }; struct archive_dir { struct archive_dir_entry *head, *tail; }; static int append_archive(struct bsdtar *, struct archive *, struct archive *ina); static int append_archive_filename(struct bsdtar *, struct archive *, const char *fname); static void archive_names_from_file(struct bsdtar *bsdtar, struct archive *a); static int copy_file_data_block(struct bsdtar *, struct archive *a, struct archive *, struct archive_entry *); static void excluded_callback(struct archive *, void *, struct archive_entry *); static void report_write(struct bsdtar *, struct archive *, struct archive_entry *, int64_t progress); static void test_for_append(struct bsdtar *); static int metadata_filter(struct archive *, void *, struct archive_entry *); static void write_archive(struct archive *, struct bsdtar *); static void write_entry(struct bsdtar *, struct archive *, struct archive_entry *); static void write_file(struct bsdtar *, struct archive *, struct archive_entry *); static void write_hierarchy(struct bsdtar *, struct archive *, const char *); #if defined(_WIN32) && !defined(__CYGWIN__) /* Not a full lseek() emulation, but enough for our needs here. */ static int seek_file(int fd, int64_t offset, int whence) { LARGE_INTEGER distance; (void)whence; /* UNUSED */ distance.QuadPart = offset; return (SetFilePointerEx((HANDLE)_get_osfhandle(fd), distance, NULL, FILE_BEGIN) ? 1 : -1); } #define open _open #define close _close #define read _read #ifdef lseek #undef lseek #endif #define lseek seek_file #endif static void set_writer_options(struct bsdtar *bsdtar, struct archive *a) { const char *writer_options; int r; writer_options = getenv(ENV_WRITER_OPTIONS); if (writer_options != NULL) { size_t module_len = sizeof(IGNORE_WRONG_MODULE_NAME) - 1; size_t opt_len = strlen(writer_options) + 1; char *p; /* Set default write options. */ if ((p = malloc(module_len + opt_len)) == NULL) lafe_errc(1, errno, "Out of memory"); /* Prepend magic code to ignore options for * a format or filters which are not added to * the archive write object. */ memcpy(p, IGNORE_WRONG_MODULE_NAME, module_len); memcpy(p, writer_options, opt_len); r = archive_write_set_options(a, p); free(p); if (r < ARCHIVE_WARN) lafe_errc(1, 0, "%s", archive_error_string(a)); else archive_clear_error(a); } if (ARCHIVE_OK != archive_write_set_options(a, bsdtar->option_options)) lafe_errc(1, 0, "%s", archive_error_string(a)); } static void set_reader_options(struct bsdtar *bsdtar, struct archive *a) { const char *reader_options; int r; (void)bsdtar; /* UNUSED */ reader_options = getenv(ENV_READER_OPTIONS); if (reader_options != NULL) { size_t module_len = sizeof(IGNORE_WRONG_MODULE_NAME) - 1; size_t opt_len = strlen(reader_options) + 1; char *p; /* Set default write options. */ if ((p = malloc(module_len + opt_len)) == NULL) if (p == NULL) lafe_errc(1, errno, "Out of memory"); /* Prepend magic code to ignore options for * a format or filters which are not added to * the archive write object. */ memcpy(p, IGNORE_WRONG_MODULE_NAME, module_len); memcpy(p, reader_options, opt_len); r = archive_read_set_options(a, p); free(p); if (r < ARCHIVE_WARN) lafe_errc(1, 0, "%s", archive_error_string(a)); else archive_clear_error(a); } if (bsdtar->flags & OPTFLAG_IGNORE_ZEROS) if (archive_read_set_options(a, "read_concatenated_archives") != ARCHIVE_OK) lafe_errc(1, 0, "%s", archive_error_string(a)); } void tar_mode_c(struct bsdtar *bsdtar) { struct archive *a; const void *filter_name; int r; if (*bsdtar->argv == NULL && bsdtar->names_from_file == NULL) lafe_errc(1, 0, "no files or directories specified"); a = archive_write_new(); /* Support any format that the library supports. */ if (cset_get_format(bsdtar->cset) == NULL) { r = archive_write_set_format_pax_restricted(a); cset_set_format(bsdtar->cset, "pax restricted"); } else { r = archive_write_set_format_by_name(a, cset_get_format(bsdtar->cset)); } if (r != ARCHIVE_OK) { fprintf(stderr, "Can't use format %s: %s\n", cset_get_format(bsdtar->cset), archive_error_string(a)); usage(); } archive_write_set_bytes_per_block(a, bsdtar->bytes_per_block); archive_write_set_bytes_in_last_block(a, bsdtar->bytes_in_last_block); r = cset_write_add_filters(bsdtar->cset, a, &filter_name); if (r < ARCHIVE_WARN) { lafe_errc(1, 0, "Unsupported compression option --%s", (const char *)filter_name); } set_writer_options(bsdtar, a); if (bsdtar->passphrase != NULL) r = archive_write_set_passphrase(a, bsdtar->passphrase); else r = archive_write_set_passphrase_callback(a, bsdtar, &passphrase_callback); if (r != ARCHIVE_OK) lafe_errc(1, 0, "%s", archive_error_string(a)); if (ARCHIVE_OK != archive_write_open_filename(a, bsdtar->filename)) lafe_errc(1, 0, "%s", archive_error_string(a)); write_archive(a, bsdtar); } /* * Same as 'c', except we only support tar or empty formats in * uncompressed files on disk. */ void tar_mode_r(struct bsdtar *bsdtar) { int64_t end_offset; int format; struct archive *a; struct archive_entry *entry; int r; /* Sanity-test some arguments and the file. */ test_for_append(bsdtar); format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED; #if defined(__BORLANDC__) bsdtar->fd = open(bsdtar->filename, O_RDWR | O_CREAT | O_BINARY); #else bsdtar->fd = open(bsdtar->filename, O_RDWR | O_CREAT | O_BINARY, 0666); #endif if (bsdtar->fd < 0) lafe_errc(1, errno, "Cannot open %s", bsdtar->filename); a = archive_read_new(); archive_read_support_filter_all(a); archive_read_support_format_empty(a); archive_read_support_format_tar(a); archive_read_support_format_gnutar(a); set_reader_options(bsdtar, a); r = archive_read_open_fd(a, bsdtar->fd, 10240); if (r != ARCHIVE_OK) lafe_errc(1, archive_errno(a), "Can't read archive %s: %s", bsdtar->filename, archive_error_string(a)); while (0 == archive_read_next_header(a, &entry)) { if (archive_filter_code(a, 0) != ARCHIVE_FILTER_NONE) { archive_read_free(a); close(bsdtar->fd); lafe_errc(1, 0, "Cannot append to compressed archive."); } /* Keep going until we hit end-of-archive */ format = archive_format(a); } end_offset = archive_read_header_position(a); archive_read_free(a); /* Re-open archive for writing */ a = archive_write_new(); /* * Set the format to be used for writing. To allow people to * extend empty files, we need to allow them to specify the format, * which opens the possibility that they will specify a format that * doesn't match the existing format. Hence, the following bit * of arcane ugliness. */ if (cset_get_format(bsdtar->cset) != NULL) { /* If the user requested a format, use that, but ... */ archive_write_set_format_by_name(a, cset_get_format(bsdtar->cset)); /* ... complain if it's not compatible. */ format &= ARCHIVE_FORMAT_BASE_MASK; if (format != (int)(archive_format(a) & ARCHIVE_FORMAT_BASE_MASK) && format != ARCHIVE_FORMAT_EMPTY) { lafe_errc(1, 0, "Format %s is incompatible with the archive %s.", cset_get_format(bsdtar->cset), bsdtar->filename); } } else { /* * Just preserve the current format, with a little care * for formats that libarchive can't write. */ if (format == ARCHIVE_FORMAT_EMPTY) format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED; archive_write_set_format(a, format); } if (lseek(bsdtar->fd, end_offset, SEEK_SET) < 0) lafe_errc(1, errno, "Could not seek to archive end"); set_writer_options(bsdtar, a); if (ARCHIVE_OK != archive_write_open_fd(a, bsdtar->fd)) lafe_errc(1, 0, "%s", archive_error_string(a)); write_archive(a, bsdtar); /* XXX check return val XXX */ close(bsdtar->fd); bsdtar->fd = -1; } void tar_mode_u(struct bsdtar *bsdtar) { int64_t end_offset; struct archive *a; struct archive_entry *entry; int format; struct archive_dir_entry *p; struct archive_dir archive_dir; bsdtar->archive_dir = &archive_dir; memset(&archive_dir, 0, sizeof(archive_dir)); format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED; /* Sanity-test some arguments and the file. */ test_for_append(bsdtar); bsdtar->fd = open(bsdtar->filename, O_RDWR | O_BINARY); if (bsdtar->fd < 0) lafe_errc(1, errno, "Cannot open %s", bsdtar->filename); a = archive_read_new(); archive_read_support_filter_all(a); archive_read_support_format_tar(a); archive_read_support_format_gnutar(a); set_reader_options(bsdtar, a); if (archive_read_open_fd(a, bsdtar->fd, bsdtar->bytes_per_block) != ARCHIVE_OK) { lafe_errc(1, 0, "Can't open %s: %s", bsdtar->filename, archive_error_string(a)); } /* Build a list of all entries and their recorded mod times. */ while (0 == archive_read_next_header(a, &entry)) { if (archive_filter_code(a, 0) != ARCHIVE_FILTER_NONE) { archive_read_free(a); close(bsdtar->fd); lafe_errc(1, 0, "Cannot append to compressed archive."); } if (archive_match_exclude_entry(bsdtar->matching, ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_OLDER | ARCHIVE_MATCH_EQUAL, entry) != ARCHIVE_OK) lafe_errc(1, 0, "Error : %s", archive_error_string(bsdtar->matching)); /* Record the last format determination we see */ format = archive_format(a); /* Keep going until we hit end-of-archive */ } end_offset = archive_read_header_position(a); archive_read_free(a); /* Re-open archive for writing. */ a = archive_write_new(); /* * Set format to same one auto-detected above. */ archive_write_set_format(a, format); archive_write_set_bytes_per_block(a, bsdtar->bytes_per_block); archive_write_set_bytes_in_last_block(a, bsdtar->bytes_in_last_block); if (lseek(bsdtar->fd, end_offset, SEEK_SET) < 0) lafe_errc(1, errno, "Could not seek to archive end"); set_writer_options(bsdtar, a); if (ARCHIVE_OK != archive_write_open_fd(a, bsdtar->fd)) lafe_errc(1, 0, "%s", archive_error_string(a)); write_archive(a, bsdtar); close(bsdtar->fd); bsdtar->fd = -1; while (bsdtar->archive_dir->head != NULL) { p = bsdtar->archive_dir->head->next; free(bsdtar->archive_dir->head->name); free(bsdtar->archive_dir->head); bsdtar->archive_dir->head = p; } bsdtar->archive_dir->tail = NULL; } /* * Write user-specified files/dirs to opened archive. */ static void write_archive(struct archive *a, struct bsdtar *bsdtar) { const char *arg; struct archive_entry *entry, *sparse_entry; /* Choose a suitable copy buffer size */ bsdtar->buff_size = 64 * 1024; while (bsdtar->buff_size < (size_t)bsdtar->bytes_per_block) bsdtar->buff_size *= 2; /* Try to compensate for space we'll lose to alignment. */ bsdtar->buff_size += 16 * 1024; /* Allocate a buffer for file data. */ if ((bsdtar->buff = malloc(bsdtar->buff_size)) == NULL) lafe_errc(1, 0, "cannot allocate memory"); if ((bsdtar->resolver = archive_entry_linkresolver_new()) == NULL) lafe_errc(1, 0, "cannot create link resolver"); archive_entry_linkresolver_set_strategy(bsdtar->resolver, archive_format(a)); /* Create a read_disk object. */ if ((bsdtar->diskreader = archive_read_disk_new()) == NULL) lafe_errc(1, 0, "Cannot create read_disk object"); /* Tell the read_disk how handle symlink. */ switch (bsdtar->symlink_mode) { case 'H': archive_read_disk_set_symlink_hybrid(bsdtar->diskreader); break; case 'L': archive_read_disk_set_symlink_logical(bsdtar->diskreader); break; default: archive_read_disk_set_symlink_physical(bsdtar->diskreader); break; } /* Register entry filters. */ archive_read_disk_set_matching(bsdtar->diskreader, bsdtar->matching, excluded_callback, bsdtar); archive_read_disk_set_metadata_filter_callback( bsdtar->diskreader, metadata_filter, bsdtar); /* Set the behavior of archive_read_disk. */ archive_read_disk_set_behavior(bsdtar->diskreader, bsdtar->readdisk_flags); archive_read_disk_set_standard_lookup(bsdtar->diskreader); if (bsdtar->names_from_file != NULL) archive_names_from_file(bsdtar, a); while (*bsdtar->argv) { arg = *bsdtar->argv; if (arg[0] == '-' && arg[1] == 'C') { arg += 2; if (*arg == '\0') { bsdtar->argv++; arg = *bsdtar->argv; if (arg == NULL) { lafe_warnc(0, "%s", "Missing argument for -C"); bsdtar->return_value = 1; goto cleanup; } if (*arg == '\0') { lafe_warnc(0, "Meaningless argument for -C: ''"); bsdtar->return_value = 1; goto cleanup; } } set_chdir(bsdtar, arg); } else { if (*arg != '/') do_chdir(bsdtar); /* Handle a deferred -C */ if (*arg == '@') { if (append_archive_filename(bsdtar, a, arg + 1) != 0) break; } else write_hierarchy(bsdtar, a, arg); } bsdtar->argv++; } archive_read_disk_set_matching(bsdtar->diskreader, NULL, NULL, NULL); archive_read_disk_set_metadata_filter_callback( bsdtar->diskreader, NULL, NULL); entry = NULL; archive_entry_linkify(bsdtar->resolver, &entry, &sparse_entry); while (entry != NULL) { int r; struct archive_entry *entry2; struct archive *disk = bsdtar->diskreader; /* * This tricky code here is to correctly read the contents * of the entry because the disk reader bsdtar->diskreader * is pointing at does not have any information about the * entry by this time and using archive_read_data_block() * with the disk reader consequently must fail. And we * have to re-open the entry to read the contents. */ /* TODO: Work with -C option as well. */ r = archive_read_disk_open(disk, archive_entry_sourcepath(entry)); if (r != ARCHIVE_OK) { lafe_warnc(archive_errno(disk), "%s", archive_error_string(disk)); bsdtar->return_value = 1; goto next_entry; } /* * Invoke archive_read_next_header2() to work * archive_read_data_block(), which is called via write_file(), * without failure. */ entry2 = archive_entry_new(); r = archive_read_next_header2(disk, entry2); archive_entry_free(entry2); if (r != ARCHIVE_OK) { lafe_warnc(archive_errno(disk), "%s", archive_error_string(disk)); if (r == ARCHIVE_FATAL) bsdtar->return_value = 1; archive_read_close(disk); goto next_entry; } write_file(bsdtar, a, entry); archive_read_close(disk); next_entry: archive_entry_free(entry); entry = NULL; archive_entry_linkify(bsdtar->resolver, &entry, &sparse_entry); } if (archive_write_close(a)) { lafe_warnc(0, "%s", archive_error_string(a)); bsdtar->return_value = 1; } cleanup: /* Free file data buffer. */ free(bsdtar->buff); archive_entry_linkresolver_free(bsdtar->resolver); bsdtar->resolver = NULL; archive_read_free(bsdtar->diskreader); bsdtar->diskreader = NULL; if (bsdtar->flags & OPTFLAG_TOTALS) { fprintf(stderr, "Total bytes written: %s\n", tar_i64toa(archive_filter_bytes(a, -1))); } archive_write_free(a); } /* * Archive names specified in file. * * Unless --null was specified, a line containing exactly "-C" will * cause the next line to be a directory to pass to chdir(). If * --null is specified, then a line "-C" is just another filename. */ static void archive_names_from_file(struct bsdtar *bsdtar, struct archive *a) { struct lafe_line_reader *lr; const char *line; bsdtar->next_line_is_dir = 0; lr = lafe_line_reader(bsdtar->names_from_file, (bsdtar->flags & OPTFLAG_NULL)); while ((line = lafe_line_reader_next(lr)) != NULL) { if (bsdtar->next_line_is_dir) { if (*line != '\0') set_chdir(bsdtar, line); else { lafe_warnc(0, "Meaningless argument for -C: ''"); bsdtar->return_value = 1; } bsdtar->next_line_is_dir = 0; } else if (((bsdtar->flags & OPTFLAG_NULL) == 0) && strcmp(line, "-C") == 0) bsdtar->next_line_is_dir = 1; else { if (*line != '/') do_chdir(bsdtar); /* Handle a deferred -C */ write_hierarchy(bsdtar, a, line); } } lafe_line_reader_free(lr); if (bsdtar->next_line_is_dir) lafe_errc(1, errno, "Unexpected end of filename list; " "directory expected after -C"); } /* * Copy from specified archive to current archive. Returns non-zero * for write errors (which force us to terminate the entire archiving * operation). If there are errors reading the input archive, we set * bsdtar->return_value but return zero, so the overall archiving * operation will complete and return non-zero. */ static int append_archive_filename(struct bsdtar *bsdtar, struct archive *a, const char *raw_filename) { struct archive *ina; const char *filename = raw_filename; int rc; if (strcmp(filename, "-") == 0) filename = NULL; /* Library uses NULL for stdio. */ ina = archive_read_new(); archive_read_support_format_all(ina); archive_read_support_filter_all(ina); set_reader_options(bsdtar, ina); archive_read_set_options(ina, "mtree:checkfs"); if (bsdtar->passphrase != NULL) rc = archive_read_add_passphrase(a, bsdtar->passphrase); else rc = archive_read_set_passphrase_callback(ina, bsdtar, &passphrase_callback); if (rc != ARCHIVE_OK) lafe_errc(1, 0, "%s", archive_error_string(a)); if (archive_read_open_filename(ina, filename, bsdtar->bytes_per_block)) { lafe_warnc(0, "%s", archive_error_string(ina)); bsdtar->return_value = 1; return (0); } rc = append_archive(bsdtar, a, ina); if (rc != ARCHIVE_OK) { lafe_warnc(0, "Error reading archive %s: %s", raw_filename, archive_error_string(ina)); bsdtar->return_value = 1; } archive_read_free(ina); return (rc); } static int append_archive(struct bsdtar *bsdtar, struct archive *a, struct archive *ina) { struct archive_entry *in_entry; int e; while (ARCHIVE_OK == (e = archive_read_next_header(ina, &in_entry))) { if (archive_match_excluded(bsdtar->matching, in_entry)) continue; if(edit_pathname(bsdtar, in_entry)) continue; if ((bsdtar->flags & OPTFLAG_INTERACTIVE) && !yes("copy '%s'", archive_entry_pathname(in_entry))) continue; if (bsdtar->verbose > 1) { safe_fprintf(stderr, "a "); list_item_verbose(bsdtar, stderr, in_entry); } else if (bsdtar->verbose > 0) safe_fprintf(stderr, "a %s", archive_entry_pathname(in_entry)); if (need_report()) report_write(bsdtar, a, in_entry, 0); e = archive_write_header(a, in_entry); if (e != ARCHIVE_OK) { if (!bsdtar->verbose) lafe_warnc(0, "%s: %s", archive_entry_pathname(in_entry), archive_error_string(a)); else fprintf(stderr, ": %s", archive_error_string(a)); } if (e == ARCHIVE_FATAL) exit(1); if (e >= ARCHIVE_WARN) { if (archive_entry_size(in_entry) == 0) archive_read_data_skip(ina); else if (copy_file_data_block(bsdtar, a, ina, in_entry)) exit(1); } if (bsdtar->verbose) fprintf(stderr, "\n"); } return (e == ARCHIVE_EOF ? ARCHIVE_OK : e); } /* Helper function to copy file to archive. */ static int copy_file_data_block(struct bsdtar *bsdtar, struct archive *a, struct archive *in_a, struct archive_entry *entry) { size_t bytes_read; ssize_t bytes_written; int64_t offset, progress = 0; char *null_buff = NULL; const void *buff; int r; while ((r = archive_read_data_block(in_a, &buff, &bytes_read, &offset)) == ARCHIVE_OK) { if (need_report()) report_write(bsdtar, a, entry, progress); if (offset > progress) { int64_t sparse = offset - progress; size_t ns; if (null_buff == NULL) { null_buff = bsdtar->buff; memset(null_buff, 0, bsdtar->buff_size); } while (sparse > 0) { if (sparse > (int64_t)bsdtar->buff_size) ns = bsdtar->buff_size; else ns = (size_t)sparse; bytes_written = archive_write_data(a, null_buff, ns); if (bytes_written < 0) { /* Write failed; this is bad */ lafe_warnc(0, "%s", archive_error_string(a)); return (-1); } if ((size_t)bytes_written < ns) { /* Write was truncated; warn but * continue. */ lafe_warnc(0, "%s: Truncated write; file may " "have grown while being archived.", archive_entry_pathname(entry)); return (0); } progress += bytes_written; sparse -= bytes_written; } } bytes_written = archive_write_data(a, buff, bytes_read); if (bytes_written < 0) { /* Write failed; this is bad */ lafe_warnc(0, "%s", archive_error_string(a)); return (-1); } if ((size_t)bytes_written < bytes_read) { /* Write was truncated; warn but continue. */ lafe_warnc(0, "%s: Truncated write; file may have grown " "while being archived.", archive_entry_pathname(entry)); return (0); } progress += bytes_written; } if (r < ARCHIVE_WARN) { lafe_warnc(archive_errno(a), "%s", archive_error_string(a)); return (-1); } return (0); } static void excluded_callback(struct archive *a, void *_data, struct archive_entry *entry) { struct bsdtar *bsdtar = (struct bsdtar *)_data; if (bsdtar->flags & OPTFLAG_NO_SUBDIRS) return; if (!archive_read_disk_can_descend(a)) return; if ((bsdtar->flags & OPTFLAG_INTERACTIVE) && !yes("add '%s'", archive_entry_pathname(entry))) return; archive_read_disk_descend(a); } static int metadata_filter(struct archive *a, void *_data, struct archive_entry *entry) { struct bsdtar *bsdtar = (struct bsdtar *)_data; /* XXX TODO: check whether this filesystem is * synthetic and/or local. Add a new * --local-only option to skip non-local * filesystems. Skip synthetic filesystems * regardless. * * The results should be cached, since * tree.c doesn't usually visit a directory * and the directory contents together. A simple * move-to-front list should perform quite well. * * Use archive_read_disk_current_filesystem_is_remote(). */ /* * If the user vetoes this file/directory, skip it. * We want this to be fairly late; if some other * check would veto this file, we shouldn't bother * the user with it. */ if ((bsdtar->flags & OPTFLAG_INTERACTIVE) && !yes("add '%s'", archive_entry_pathname(entry))) return (0); /* Note: if user vetoes, we won't descend. */ if (((bsdtar->flags & OPTFLAG_NO_SUBDIRS) == 0) && archive_read_disk_can_descend(a)) archive_read_disk_descend(a); return (1); } /* * Add the file or dir hierarchy named by 'path' to the archive */ static void write_hierarchy(struct bsdtar *bsdtar, struct archive *a, const char *path) { struct archive *disk = bsdtar->diskreader; struct archive_entry *entry = NULL, *spare_entry = NULL; int r; r = archive_read_disk_open(disk, path); if (r != ARCHIVE_OK) { lafe_warnc(archive_errno(disk), "%s", archive_error_string(disk)); bsdtar->return_value = 1; return; } bsdtar->first_fs = -1; for (;;) { archive_entry_free(entry); entry = archive_entry_new(); r = archive_read_next_header2(disk, entry); if (r == ARCHIVE_EOF) break; else if (r != ARCHIVE_OK) { lafe_warnc(archive_errno(disk), "%s", archive_error_string(disk)); if (r == ARCHIVE_FATAL || r == ARCHIVE_FAILED) { bsdtar->return_value = 1; archive_entry_free(entry); archive_read_close(disk); return; } else if (r < ARCHIVE_WARN) continue; } if (bsdtar->uid >= 0) { archive_entry_set_uid(entry, bsdtar->uid); if (!bsdtar->uname) archive_entry_set_uname(entry, archive_read_disk_uname(bsdtar->diskreader, bsdtar->uid)); } if (bsdtar->gid >= 0) { archive_entry_set_gid(entry, bsdtar->gid); if (!bsdtar->gname) archive_entry_set_gname(entry, archive_read_disk_gname(bsdtar->diskreader, bsdtar->gid)); } if (bsdtar->uname) archive_entry_set_uname(entry, bsdtar->uname); if (bsdtar->gname) archive_entry_set_gname(entry, bsdtar->gname); /* * Rewrite the pathname to be archived. If rewrite * fails, skip the entry. */ if (edit_pathname(bsdtar, entry)) continue; /* Display entry as we process it. */ if (bsdtar->verbose > 1) { safe_fprintf(stderr, "a "); list_item_verbose(bsdtar, stderr, entry); } else if (bsdtar->verbose > 0) { /* This format is required by SUSv2. */ safe_fprintf(stderr, "a %s", archive_entry_pathname(entry)); } /* Non-regular files get archived with zero size. */ if (archive_entry_filetype(entry) != AE_IFREG) archive_entry_set_size(entry, 0); archive_entry_linkify(bsdtar->resolver, &entry, &spare_entry); while (entry != NULL) { write_file(bsdtar, a, entry); if (entry != spare_entry) { archive_entry_free(entry); } entry = spare_entry; spare_entry = NULL; } if (bsdtar->verbose) fprintf(stderr, "\n"); } archive_entry_free(entry); archive_read_close(disk); } /* * Write a single file (or directory or other filesystem object) to * the archive. */ static void write_file(struct bsdtar *bsdtar, struct archive *a, struct archive_entry *entry) { write_entry(bsdtar, a, entry); } /* * Write a single entry to the archive. */ static void write_entry(struct bsdtar *bsdtar, struct archive *a, struct archive_entry *entry) { int e; e = archive_write_header(a, entry); if (e != ARCHIVE_OK) { if (bsdtar->verbose > 1) { safe_fprintf(stderr, "a "); list_item_verbose(bsdtar, stderr, entry); lafe_warnc(0, ": %s", archive_error_string(a)); } else { lafe_warnc(0, "%s: %s", archive_entry_pathname(entry), archive_error_string(a)); } } if (e == ARCHIVE_FATAL) exit(1); /* * If we opened a file earlier, write it out now. Note that * the format handler might have reset the size field to zero * to inform us that the archive body won't get stored. In * that case, just skip the write. */ if (e >= ARCHIVE_WARN && archive_entry_size(entry) > 0) { if (copy_file_data_block(bsdtar, a, bsdtar->diskreader, entry)) exit(1); } } static void report_write(struct bsdtar *bsdtar, struct archive *a, struct archive_entry *entry, int64_t progress) { uint64_t comp, uncomp; int compression; if (bsdtar->verbose) fprintf(stderr, "\n"); comp = archive_filter_bytes(a, -1); uncomp = archive_filter_bytes(a, 0); fprintf(stderr, "In: %d files, %s bytes;", archive_file_count(a), tar_i64toa(uncomp)); if (comp >= uncomp) compression = 0; else compression = (int)((uncomp - comp) * 100 / uncomp); fprintf(stderr, " Out: %s bytes, compression %d%%\n", tar_i64toa(comp), compression); /* Can't have two calls to tar_i64toa() pending, so split the output. */ safe_fprintf(stderr, "Current: %s (%s", archive_entry_pathname(entry), tar_i64toa(progress)); fprintf(stderr, "/%s bytes)\n", tar_i64toa(archive_entry_size(entry))); } static void test_for_append(struct bsdtar *bsdtar) { struct stat s; if (*bsdtar->argv == NULL && bsdtar->names_from_file == NULL) lafe_errc(1, 0, "no files or directories specified"); if (bsdtar->filename == NULL) lafe_errc(1, 0, "Cannot append to stdout."); if (stat(bsdtar->filename, &s) != 0) return; if (!S_ISREG(s.st_mode) && !S_ISBLK(s.st_mode)) lafe_errc(1, 0, "Cannot append to %s: not a regular file.", bsdtar->filename); /* Is this an appropriate check here on Windows? */ /* if (GetFileType(handle) != FILE_TYPE_DISK) lafe_errc(1, 0, "Cannot append"); */ }