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 (!new_enough(bsdtar, archive_entry_pathname(in_entry), archive_entry_stat(in_entry))) continue; if (lafe_excluded(bsdtar->matching, archive_entry_pathname(in_entry))) continue; if (bsdtar->option_interactive && !yes("copy '%s'", archive_entry_pathname(in_entry))) continue; if (bsdtar->verbose) 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(bsdtar, a, ina, in_entry)) exit(1); } if (bsdtar->verbose) fprintf(stderr, "\n"); } return (e == ARCHIVE_EOF ? ARCHIVE_OK : e); }
static void mode_list(struct cpio *cpio) { struct archive *a; struct archive_entry *entry; int r; a = archive_read_new(); if (a == NULL) lafe_errc(1, 0, "Couldn't allocate archive object"); archive_read_support_compression_all(a); archive_read_support_format_all(a); if (archive_read_open_file(a, cpio->filename, cpio->bytes_per_block)) lafe_errc(1, archive_errno(a), "%s", archive_error_string(a)); for (;;) { r = archive_read_next_header(a, &entry); if (r == ARCHIVE_EOF) break; if (r != ARCHIVE_OK) { lafe_errc(1, archive_errno(a), "%s", archive_error_string(a)); } if (lafe_excluded(cpio->matching, archive_entry_pathname(entry))) continue; if (cpio->verbose) list_item_verbose(cpio, entry); else fprintf(stdout, "%s\n", archive_entry_pathname(entry)); } r = archive_read_close(a); if (r != ARCHIVE_OK) lafe_errc(1, 0, "%s", archive_error_string(a)); if (!cpio->quiet) { int64_t blocks = (archive_position_uncompressed(a) + 511) / 512; fprintf(stderr, "%lu %s\n", (unsigned long)blocks, blocks == 1 ? "block" : "blocks"); } archive_read_finish(a); exit(0); }
static void mode_in(struct cpio *cpio) { struct archive *a; struct archive_entry *entry; struct archive *ext; const char *destpath; int r; ext = archive_write_disk_new(); if (ext == NULL) lafe_errc(1, 0, "Couldn't allocate restore object"); r = archive_write_disk_set_options(ext, cpio->extract_flags); if (r != ARCHIVE_OK) lafe_errc(1, 0, "%s", archive_error_string(ext)); a = archive_read_new(); if (a == NULL) lafe_errc(1, 0, "Couldn't allocate archive object"); archive_read_support_compression_all(a); archive_read_support_format_all(a); if (archive_read_open_file(a, cpio->filename, cpio->bytes_per_block)) lafe_errc(1, archive_errno(a), "%s", archive_error_string(a)); for (;;) { r = archive_read_next_header(a, &entry); if (r == ARCHIVE_EOF) break; if (r != ARCHIVE_OK) { lafe_errc(1, archive_errno(a), "%s", archive_error_string(a)); } if (lafe_excluded(cpio->matching, archive_entry_pathname(entry))) continue; if (cpio->option_rename) { destpath = cpio_rename(archive_entry_pathname(entry)); archive_entry_set_pathname(entry, destpath); } else destpath = archive_entry_pathname(entry); if (destpath == NULL) continue; if (cpio->verbose) fprintf(stdout, "%s\n", destpath); if (cpio->uid_override >= 0) archive_entry_set_uid(entry, cpio->uid_override); if (cpio->gid_override >= 0) archive_entry_set_gid(entry, cpio->gid_override); r = archive_write_header(ext, entry); if (r != ARCHIVE_OK) { fprintf(stderr, "%s: %s\n", archive_entry_pathname(entry), archive_error_string(ext)); } else if (archive_entry_size(entry) > 0) { r = extract_data(a, ext); if (r != ARCHIVE_OK) cpio->return_value = 1; } } r = archive_read_close(a); if (r != ARCHIVE_OK) lafe_errc(1, 0, "%s", archive_error_string(a)); r = archive_write_close(ext); if (r != ARCHIVE_OK) lafe_errc(1, 0, "%s", archive_error_string(ext)); if (!cpio->quiet) { int64_t blocks = (archive_position_uncompressed(a) + 511) / 512; fprintf(stderr, "%lu %s\n", (unsigned long)blocks, blocks == 1 ? "block" : "blocks"); } archive_read_finish(a); archive_write_finish(ext); exit(cpio->return_value); }
/* * Handle 'x' and 't' modes. */ static void read_archive(struct bsdtar *bsdtar, char mode) { struct progress_data progress_data; FILE *out; struct archive *a; struct archive_entry *entry; const struct stat *st; int r; while (*bsdtar->argv) { lafe_include(&bsdtar->matching, *bsdtar->argv); bsdtar->argv++; } if (bsdtar->names_from_file != NULL) lafe_include_from_file(&bsdtar->matching, bsdtar->names_from_file, bsdtar->option_null); a = archive_read_new(); if (bsdtar->compress_program != NULL) archive_read_support_compression_program(a, bsdtar->compress_program); else archive_read_support_compression_all(a); archive_read_support_format_all(a); if (ARCHIVE_OK != archive_read_set_options(a, bsdtar->option_options)) lafe_errc(1, 0, "%s", archive_error_string(a)); if (archive_read_open_file(a, bsdtar->filename, bsdtar->bytes_per_block != 0 ? bsdtar->bytes_per_block : DEFAULT_BYTES_PER_BLOCK)) lafe_errc(1, 0, "Error opening archive: %s", archive_error_string(a)); do_chdir(bsdtar); if (mode == 'x') { /* Set an extract callback so that we can handle SIGINFO. */ progress_data.bsdtar = bsdtar; progress_data.archive = a; archive_read_extract_set_progress_callback(a, progress_func, &progress_data); } if (mode == 'x' && bsdtar->option_chroot) { #if HAVE_CHROOT if (chroot(".") != 0) lafe_errc(1, errno, "Can't chroot to \".\""); #else lafe_errc(1, 0, "chroot isn't supported on this platform"); #endif } for (;;) { /* Support --fast-read option */ if (bsdtar->option_fast_read && lafe_unmatched_inclusions(bsdtar->matching) == 0) break; r = archive_read_next_header(a, &entry); progress_data.entry = entry; if (r == ARCHIVE_EOF) break; if (r < ARCHIVE_OK) lafe_warnc(0, "%s", archive_error_string(a)); if (r <= ARCHIVE_WARN) bsdtar->return_value = 1; if (r == ARCHIVE_RETRY) { /* Retryable error: try again */ lafe_warnc(0, "Retrying..."); continue; } if (r == ARCHIVE_FATAL) break; if (bsdtar->uid >= 0) { archive_entry_set_uid(entry, bsdtar->uid); archive_entry_set_uname(entry, NULL); } if (bsdtar->gid >= 0) { archive_entry_set_gid(entry, bsdtar->gid); archive_entry_set_gname(entry, NULL); } if (bsdtar->uname) archive_entry_set_uname(entry, bsdtar->uname); if (bsdtar->gname) archive_entry_set_gname(entry, bsdtar->gname); /* * Exclude entries that are too old. */ st = archive_entry_stat(entry); if (bsdtar->newer_ctime_sec > 0) { if (st->st_ctime < bsdtar->newer_ctime_sec) continue; /* Too old, skip it. */ if (st->st_ctime == bsdtar->newer_ctime_sec && ARCHIVE_STAT_CTIME_NANOS(st) <= bsdtar->newer_ctime_nsec) continue; /* Too old, skip it. */ } if (bsdtar->newer_mtime_sec > 0) { if (st->st_mtime < bsdtar->newer_mtime_sec) continue; /* Too old, skip it. */ if (st->st_mtime == bsdtar->newer_mtime_sec && ARCHIVE_STAT_MTIME_NANOS(st) <= bsdtar->newer_mtime_nsec) continue; /* Too old, skip it. */ } /* * Note that pattern exclusions are checked before * pathname rewrites are handled. This gives more * control over exclusions, since rewrites always lose * information. (For example, consider a rewrite * s/foo[0-9]/foo/. If we check exclusions after the * rewrite, there would be no way to exclude foo1/bar * while allowing foo2/bar.) */ if (lafe_excluded(bsdtar->matching, archive_entry_pathname(entry))) continue; /* Excluded by a pattern test. */ if (mode == 't') { /* Perversely, gtar uses -O to mean "send to stderr" * when used with -t. */ out = bsdtar->option_stdout ? stderr : stdout; /* * TODO: Provide some reasonable way to * preview rewrites. gtar always displays * the unedited path in -t output, which means * you cannot easily preview rewrites. */ if (bsdtar->verbose < 2) safe_fprintf(out, "%s", archive_entry_pathname(entry)); else list_item_verbose(bsdtar, out, entry); fflush(out); r = archive_read_data_skip(a); if (r == ARCHIVE_WARN) { fprintf(out, "\n"); lafe_warnc(0, "%s", archive_error_string(a)); } if (r == ARCHIVE_RETRY) { fprintf(out, "\n"); lafe_warnc(0, "%s", archive_error_string(a)); } if (r == ARCHIVE_FATAL) { fprintf(out, "\n"); lafe_warnc(0, "%s", archive_error_string(a)); bsdtar->return_value = 1; break; } fprintf(out, "\n"); } else { /* Note: some rewrite failures prevent extraction. */ if (edit_pathname(bsdtar, entry)) continue; /* Excluded by a rewrite failure. */ if (bsdtar->option_interactive && !yes("extract '%s'", archive_entry_pathname(entry))) continue; /* * Format here is from SUSv2, including the * deferred '\n'. */ if (bsdtar->verbose) { safe_fprintf(stderr, "x %s", archive_entry_pathname(entry)); fflush(stderr); } // TODO siginfo_printinfo(bsdtar, 0); if (bsdtar->option_stdout) r = archive_read_data_into_fd(a, 1); else r = archive_read_extract(a, entry, bsdtar->extract_flags); if (r != ARCHIVE_OK) { if (!bsdtar->verbose) safe_fprintf(stderr, "%s", archive_entry_pathname(entry)); safe_fprintf(stderr, ": %s", archive_error_string(a)); if (!bsdtar->verbose) fprintf(stderr, "\n"); bsdtar->return_value = 1; } if (bsdtar->verbose) fprintf(stderr, "\n"); if (r == ARCHIVE_FATAL) break; } } r = archive_read_close(a); if (r != ARCHIVE_OK) lafe_warnc(0, "%s", archive_error_string(a)); if (r <= ARCHIVE_WARN) bsdtar->return_value = 1; if (bsdtar->verbose > 2) fprintf(stdout, "Archive Format: %s, Compression: %s\n", archive_format_name(a), archive_compression_name(a)); archive_read_finish(a); }
/* * 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_entry *entry = NULL, *spare_entry = NULL; struct tree *tree; char symlink_mode = bsdtar->symlink_mode; dev_t first_dev = 0; int dev_recorded = 0; int tree_ret; tree = tree_open(path); if (!tree) { lafe_warnc(errno, "%s: Cannot open", path); bsdtar->return_value = 1; return; } while ((tree_ret = tree_next(tree)) != 0) { int r; const char *name = tree_current_path(tree); const struct stat *st = NULL; /* info to use for this entry */ const struct stat *lst = NULL; /* lstat() information */ int descend; if (tree_ret == TREE_ERROR_FATAL) lafe_errc(1, tree_errno(tree), "%s: Unable to continue traversing directory tree", name); if (tree_ret == TREE_ERROR_DIR) { lafe_warnc(errno, "%s: Couldn't visit directory", name); bsdtar->return_value = 1; } if (tree_ret != TREE_REGULAR) continue; /* * If this file/dir is excluded by a filename * pattern, skip it. */ if (lafe_excluded(bsdtar->matching, name)) continue; /* * Get lstat() info from the tree library. */ lst = tree_current_lstat(tree); if (lst == NULL) { /* Couldn't lstat(); must not exist. */ lafe_warnc(errno, "%s: Cannot stat", name); /* Return error if files disappear during traverse. */ bsdtar->return_value = 1; continue; } /* * Distinguish 'L'/'P'/'H' symlink following. */ switch(symlink_mode) { case 'H': /* 'H': After the first item, rest like 'P'. */ symlink_mode = 'P'; /* 'H': First item (from command line) like 'L'. */ /* FALLTHROUGH */ case 'L': /* 'L': Do descend through a symlink to dir. */ descend = tree_current_is_dir(tree); /* 'L': Follow symlinks to files. */ archive_read_disk_set_symlink_logical(bsdtar->diskreader); /* 'L': Archive symlinks as targets, if we can. */ st = tree_current_stat(tree); if (st != NULL) break; /* If stat fails, we have a broken symlink; * in that case, don't follow the link. */ /* FALLTHROUGH */ default: /* 'P': Don't descend through a symlink to dir. */ descend = tree_current_is_physical_dir(tree); /* 'P': Don't follow symlinks to files. */ archive_read_disk_set_symlink_physical(bsdtar->diskreader); /* 'P': Archive symlinks as symlinks. */ st = lst; break; } if (bsdtar->option_no_subdirs) descend = 0; /* * Are we about to cross to a new filesystem? */ if (!dev_recorded) { /* This is the initial file system. */ first_dev = lst->st_dev; dev_recorded = 1; } else if (lst->st_dev == first_dev) { /* The starting file system is always acceptable. */ } else if (descend == 0) { /* We're not descending, so no need to check. */ } else if (bsdtar->option_dont_traverse_mounts) { descend = 0; } else { /* We're prepared to cross a mount point. */ /* 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. * * This is going to be heavily OS dependent: * FreeBSD's statfs() in conjunction with getvfsbyname() * provides all of this; NetBSD's statvfs() does * most of it; other systems will vary. */ } /* * In -u mode, check that the file is newer than what's * already in the archive; in all modes, obey --newerXXX flags. */ if (!new_enough(bsdtar, name, st)) { if (!descend) continue; if (bsdtar->option_interactive && !yes("add '%s'", name)) continue; tree_descend(tree); continue; } archive_entry_free(entry); entry = archive_entry_new(); archive_entry_set_pathname(entry, name); archive_entry_copy_sourcepath(entry, tree_current_access_path(tree)); /* Populate the archive_entry with metadata from the disk. */ /* XXX TODO: Arrange to open a regular file before * calling this so we can pass in an fd and shorten * the race to query metadata. The linkify dance * makes this more complex than it might sound. */ #if defined(_WIN32) && !defined(__CYGWIN__) /* TODO: tree.c uses stat(), which is badly broken * on Windows. To fix this, we should * deprecate tree_current_stat() and provide a new * call tree_populate_entry(t, entry). This call * would use stat() internally on POSIX and * GetInfoByFileHandle() internally on Windows. * This would be another step towards a tree-walker * that can be integrated deep into libarchive. * For now, just set st to NULL on Windows; * archive_read_disk_entry_from_file() should * be smart enough to use platform-appropriate * ways to probe file information. */ st = NULL; #endif r = archive_read_disk_entry_from_file(bsdtar->diskreader, entry, -1, st); 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); if (r != ARCHIVE_OK) lafe_warnc(archive_errno(bsdtar->diskreader), "%s", archive_error_string(bsdtar->diskreader)); if (r < ARCHIVE_WARN) continue; /* XXX TODO: Just use flag data from entry; avoid the * duplicate check here. */ /* * If this file/dir is flagged "nodump" and we're * honoring such flags, skip this file/dir. */ #if defined(HAVE_STRUCT_STAT_ST_FLAGS) && defined(UF_NODUMP) /* BSD systems store flags in struct stat */ if (bsdtar->option_honor_nodump && (lst->st_flags & UF_NODUMP)) continue; #endif #if defined(EXT2_IOC_GETFLAGS) && defined(EXT2_NODUMP_FL) /* Linux uses ioctl to read flags. */ if (bsdtar->option_honor_nodump) { int fd = open(name, O_RDONLY | O_NONBLOCK | O_BINARY); if (fd >= 0) { unsigned long fflags; int r = ioctl(fd, EXT2_IOC_GETFLAGS, &fflags); close(fd); if (r >= 0 && (fflags & EXT2_NODUMP_FL)) continue; } } #endif #ifdef __APPLE__ if (bsdtar->enable_copyfile) { /* If we're using copyfile(), ignore "._XXX" files. */ const char *bname = strrchr(name, '/'); if (bname == NULL) bname = name; else ++bname; if (bname[0] == '.' && bname[1] == '_') continue; } else { /* If not, drop the copyfile() data. */ archive_entry_copy_mac_metadata(entry, NULL, 0); } #endif /* * 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->option_interactive && !yes("add '%s'", name)) continue; if (descend) tree_descend(tree); /* * Rewrite the pathname to be archived. If rewrite * fails, skip the entry. */ if (edit_pathname(bsdtar, entry)) continue; /* Display entry as we process it. * This format is required by SUSv2. */ if (bsdtar->verbose) 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); archive_entry_free(entry); entry = spare_entry; spare_entry = NULL; } if (bsdtar->verbose) fprintf(stderr, "\n"); } archive_entry_free(entry); tree_close(tree); }