diff options
Diffstat (limited to 'usr.bin/tar/write.c')
| -rw-r--r-- | usr.bin/tar/write.c | 1176 |
1 files changed, 0 insertions, 1176 deletions
diff --git a/usr.bin/tar/write.c b/usr.bin/tar/write.c deleted file mode 100644 index 1105159..0000000 --- a/usr.bin/tar/write.c +++ /dev/null @@ -1,1176 +0,0 @@ -/*- - * Copyright (c) 2003-2007 Tim Kientzle - * All rights reserved. - * - * 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. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``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 AUTHOR(S) 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. - */ - -#include "bsdtar_platform.h" -__FBSDID("$FreeBSD$"); - -#ifdef HAVE_SYS_TYPES_H -#include <sys/types.h> -#endif -#ifdef HAVE_SYS_IOCTL_H -#include <sys/ioctl.h> -#endif -#ifdef HAVE_SYS_STAT_H -#include <sys/stat.h> -#endif -#ifdef HAVE_ATTR_XATTR_H -#include <attr/xattr.h> -#endif -#ifdef HAVE_ERRNO_H -#include <errno.h> -#endif -#ifdef HAVE_FCNTL_H -#include <fcntl.h> -#endif -#ifdef HAVE_GRP_H -#include <grp.h> -#endif -#ifdef HAVE_IO_H -#include <io.h> -#endif -#ifdef HAVE_LIMITS_H -#include <limits.h> -#endif -#ifdef HAVE_LINUX_FS_H -#include <linux/fs.h> /* for Linux file flags */ -#endif -/* - * Some Linux distributions have both linux/ext2_fs.h and ext2fs/ext2_fs.h. - * As the include guards don't agree, the order of include is important. - */ -#ifdef HAVE_LINUX_EXT2_FS_H -#include <linux/ext2_fs.h> /* for Linux file flags */ -#endif -#if defined(HAVE_EXT2FS_EXT2_FS_H) && !defined(__CYGWIN__) -/* This header exists but is broken on Cygwin. */ -#include <ext2fs/ext2_fs.h> -#endif -#ifdef HAVE_PWD_H -#include <pwd.h> -#endif -#ifdef HAVE_STDINT_H -#include <stdint.h> -#endif -#include <stdio.h> -#ifdef HAVE_STDLIB_H -#include <stdlib.h> -#endif -#ifdef HAVE_STRING_H -#include <string.h> -#endif -#ifdef HAVE_UNISTD_H -#include <unistd.h> -#endif - -#include "bsdtar.h" -#include "err.h" -#include "line_reader.h" -#include "tree.h" - -/* Size of buffer for holding file data prior to writing. */ -#define FILEDATABUFLEN 65536 - -/* Fixed size of uname/gname caches. */ -#define name_cache_size 101 - -#ifndef O_BINARY -#define O_BINARY 0 -#endif - -static const char * const NO_NAME = "(noname)"; - -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; -}; - -struct name_cache { - int probes; - int hits; - size_t size; - struct { - id_t id; - const char *name; - } cache[name_cache_size]; -}; - -static void add_dir_list(struct bsdtar *bsdtar, const char *path, - time_t mtime_sec, int mtime_nsec); -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(struct bsdtar *, struct archive *a, - struct archive *ina, struct archive_entry *); -static int new_enough(struct bsdtar *, const char *path, - const struct stat *); -static void report_write(struct bsdtar *, struct archive *, - struct archive_entry *, int64_t progress); -static void test_for_append(struct bsdtar *); -static void write_archive(struct archive *, struct bsdtar *); -static void write_entry_backend(struct bsdtar *, struct archive *, - struct archive_entry *); -static int write_file_data(struct bsdtar *, struct archive *, - struct archive_entry *, int fd); -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 -#define lseek seek_file -#endif - -void -tar_mode_c(struct bsdtar *bsdtar) -{ - struct archive *a; - 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 (bsdtar->create_format == NULL) { - r = archive_write_set_format_pax_restricted(a); - bsdtar->create_format = "pax restricted"; - } else { - r = archive_write_set_format_by_name(a, bsdtar->create_format); - } - if (r != ARCHIVE_OK) { - fprintf(stderr, "Can't use format %s: %s\n", - bsdtar->create_format, - archive_error_string(a)); - usage(); - } - - /* - * If user explicitly set the block size, then assume they - * want the last block padded as well. Otherwise, use the - * default block size and accept archive_write_open_file()'s - * default padding decisions. - */ - if (bsdtar->bytes_per_block != 0) { - archive_write_set_bytes_per_block(a, bsdtar->bytes_per_block); - archive_write_set_bytes_in_last_block(a, - bsdtar->bytes_per_block); - } else - archive_write_set_bytes_per_block(a, DEFAULT_BYTES_PER_BLOCK); - - if (bsdtar->compress_program) { - archive_write_set_compression_program(a, bsdtar->compress_program); - } else { - switch (bsdtar->create_compression) { - case 0: - r = archive_write_set_compression_none(a); - break; - case 'j': case 'y': - r = archive_write_set_compression_bzip2(a); - break; - case 'J': - r = archive_write_set_compression_xz(a); - break; - case OPTION_LZMA: - r = archive_write_set_compression_lzma(a); - break; - case 'z': - r = archive_write_set_compression_gzip(a); - break; - case 'Z': - r = archive_write_set_compression_compress(a); - break; - default: - lafe_errc(1, 0, - "Unrecognized compression option -%c", - bsdtar->create_compression); - } - if (r != ARCHIVE_OK) { - lafe_errc(1, 0, - "Unsupported compression option -%c", - bsdtar->create_compression); - } - } - - if (ARCHIVE_OK != archive_write_set_options(a, bsdtar->option_options)) - lafe_errc(1, 0, "%s", archive_error_string(a)); - if (ARCHIVE_OK != archive_write_open_file(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_compression_all(a); - archive_read_support_format_tar(a); - archive_read_support_format_gnutar(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_compression(a) != ARCHIVE_COMPRESSION_NONE) { - archive_read_finish(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_finish(a); - - /* Re-open archive for writing */ - a = archive_write_new(); - archive_write_set_compression_none(a); - /* - * 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 (bsdtar->create_format != NULL) { - /* If the user requested a format, use that, but ... */ - archive_write_set_format_by_name(a, - bsdtar->create_format); - /* ... 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.", - bsdtar->create_format, bsdtar->filename); - } - } else { - /* - * Just preserve the current format, with a little care - * for formats that libarchive can't write. - */ - if (format == ARCHIVE_FORMAT_TAR_GNUTAR) - /* TODO: When gtar supports pax, use pax restricted. */ - format = ARCHIVE_FORMAT_TAR_USTAR; - 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"); - if (ARCHIVE_OK != archive_write_set_options(a, bsdtar->option_options)) - lafe_errc(1, 0, "%s", archive_error_string(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_compression_all(a); - archive_read_support_format_tar(a); - archive_read_support_format_gnutar(a); - if (archive_read_open_fd(a, bsdtar->fd, - bsdtar->bytes_per_block != 0 ? bsdtar->bytes_per_block : - DEFAULT_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_compression(a) != ARCHIVE_COMPRESSION_NONE) { - archive_read_finish(a); - close(bsdtar->fd); - lafe_errc(1, 0, - "Cannot append to compressed archive."); - } - add_dir_list(bsdtar, archive_entry_pathname(entry), - archive_entry_mtime(entry), - archive_entry_mtime_nsec(entry)); - /* 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_finish(a); - - /* Re-open archive for writing. */ - a = archive_write_new(); - archive_write_set_compression_none(a); - /* - * Set format to same one auto-detected above, except that - * we don't write GNU tar format, so use ustar instead. - */ - if (format == ARCHIVE_FORMAT_TAR_GNUTAR) - format = ARCHIVE_FORMAT_TAR_USTAR; - archive_write_set_format(a, format); - if (bsdtar->bytes_per_block != 0) { - archive_write_set_bytes_per_block(a, bsdtar->bytes_per_block); - archive_write_set_bytes_in_last_block(a, - bsdtar->bytes_per_block); - } else - archive_write_set_bytes_per_block(a, DEFAULT_BYTES_PER_BLOCK); - if (lseek(bsdtar->fd, end_offset, SEEK_SET) < 0) - lafe_errc(1, errno, "Could not seek to archive end"); - if (ARCHIVE_OK != archive_write_set_options(a, bsdtar->option_options)) - lafe_errc(1, 0, "%s", archive_error_string(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; - - /* Allocate a buffer for file data. */ - if ((bsdtar->buff = malloc(FILEDATABUFLEN)) == 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)); - if ((bsdtar->diskreader = archive_read_disk_new()) == NULL) - lafe_errc(1, 0, "Cannot create read_disk object"); - 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; - } - } - set_chdir(bsdtar, arg); - } else { - if (*arg != '/' && (arg[0] != '@' || arg[1] != '/')) - 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++; - } - - entry = NULL; - archive_entry_linkify(bsdtar->resolver, &entry, &sparse_entry); - while (entry != NULL) { - write_entry_backend(bsdtar, a, 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_finish(bsdtar->diskreader); - bsdtar->diskreader = NULL; - - if (bsdtar->option_totals) { - fprintf(stderr, "Total bytes written: %s\n", - tar_i64toa(archive_position_compressed(a))); - } - - archive_write_finish(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->option_null); - while ((line = lafe_line_reader_next(lr)) != NULL) { - if (bsdtar->next_line_is_dir) { - set_chdir(bsdtar, line); - bsdtar->next_line_is_dir = 0; - } else if (!bsdtar->option_null && 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 *filename) -{ - struct archive *ina; - 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_compression_all(ina); - if (archive_read_open_file(ina, filename, 10240)) { - 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", - filename, archive_error_string(ina)); - bsdtar->return_value = 1; - } - archive_read_finish(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 (!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); -} - -/* Helper function to copy data between archives. */ -static int -copy_file_data(struct bsdtar *bsdtar, struct archive *a, - struct archive *ina, struct archive_entry *entry) -{ - ssize_t bytes_read; - ssize_t bytes_written; - int64_t progress = 0; - - bytes_read = archive_read_data(ina, bsdtar->buff, FILEDATABUFLEN); - while (bytes_read > 0) { - if (need_report()) - report_write(bsdtar, a, entry, progress); - - bytes_written = archive_write_data(a, bsdtar->buff, - bytes_read); - if (bytes_written < bytes_read) { - lafe_warnc(0, "%s", archive_error_string(a)); - return (-1); - } - progress += bytes_written; - bytes_read = archive_read_data(ina, bsdtar->buff, - FILEDATABUFLEN); - } - - return (0); -} - -/* - * 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 - - /* - * 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_entry_backend(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); -} - -/* - * Backend for write_entry. - */ -static void -write_entry_backend(struct bsdtar *bsdtar, struct archive *a, - struct archive_entry *entry) -{ - int fd = -1; - int e; - - if (archive_entry_size(entry) > 0) { - const char *pathname = archive_entry_sourcepath(entry); - fd = open(pathname, O_RDONLY | O_BINARY); - if (fd == -1) { - bsdtar->return_value = 1; - if (!bsdtar->verbose) - lafe_warnc(errno, - "%s: could not open file", pathname); - else - fprintf(stderr, ": %s", strerror(errno)); - return; - } - } - - e = archive_write_header(a, entry); - if (e != ARCHIVE_OK) { - if (!bsdtar->verbose) - lafe_warnc(0, "%s: %s", - archive_entry_pathname(entry), - archive_error_string(a)); - else - fprintf(stderr, ": %s", 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 && fd >= 0 && archive_entry_size(entry) > 0) { - if (write_file_data(bsdtar, a, entry, fd)) - exit(1); - } - - /* - * If we opened a file, close it now even if there was an error - * which made us decide not to write the archive body. - */ - if (fd >= 0) - close(fd); -} - -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_position_compressed(a); - uncomp = archive_position_uncompressed(a); - 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))); -} - - -/* Helper function to copy file to archive. */ -static int -write_file_data(struct bsdtar *bsdtar, struct archive *a, - struct archive_entry *entry, int fd) -{ - ssize_t bytes_read; - ssize_t bytes_written; - int64_t progress = 0; - - bytes_read = read(fd, bsdtar->buff, FILEDATABUFLEN); - while (bytes_read > 0) { - if (need_report()) - report_write(bsdtar, a, entry, progress); - - bytes_written = archive_write_data(a, bsdtar->buff, - bytes_read); - if (bytes_written < 0) { - /* Write failed; this is bad */ - lafe_warnc(0, "%s", archive_error_string(a)); - return (-1); - } - if (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; - bytes_read = read(fd, bsdtar->buff, FILEDATABUFLEN); - } - if (bytes_read < 0) { - lafe_warnc(errno, - "%s: Read error", - archive_entry_pathname(entry)); - bsdtar->return_value = 1; - } - return 0; -} - -/* - * Test if the specified file is new enough to include in the archive. - */ -static int -new_enough(struct bsdtar *bsdtar, const char *path, const struct stat *st) -{ - struct archive_dir_entry *p; - - /* - * If this file/dir is excluded by a time comparison, skip it. - */ - if (bsdtar->newer_ctime_sec > 0) { - if (st->st_ctime < bsdtar->newer_ctime_sec) - return (0); /* Too old, skip it. */ - if (st->st_ctime == bsdtar->newer_ctime_sec - && ARCHIVE_STAT_CTIME_NANOS(st) - <= bsdtar->newer_ctime_nsec) - return (0); /* Too old, skip it. */ - } - if (bsdtar->newer_mtime_sec > 0) { - if (st->st_mtime < bsdtar->newer_mtime_sec) - return (0); /* Too old, skip it. */ - if (st->st_mtime == bsdtar->newer_mtime_sec - && ARCHIVE_STAT_MTIME_NANOS(st) - <= bsdtar->newer_mtime_nsec) - return (0); /* Too old, skip it. */ - } - - /* - * In -u mode, we only write an entry if it's newer than - * what was already in the archive. - */ - if (bsdtar->archive_dir != NULL && - bsdtar->archive_dir->head != NULL) { - for (p = bsdtar->archive_dir->head; p != NULL; p = p->next) { - if (pathcmp(path, p->name)==0) - return (p->mtime_sec < st->st_mtime || - (p->mtime_sec == st->st_mtime && - p->mtime_nsec - < ARCHIVE_STAT_MTIME_NANOS(st))); - } - } - - /* If the file wasn't rejected, include it. */ - return (1); -} - -/* - * Add an entry to the dir list for 'u' mode. - * - * XXX TODO: Make this fast. - */ -static void -add_dir_list(struct bsdtar *bsdtar, const char *path, - time_t mtime_sec, int mtime_nsec) -{ - struct archive_dir_entry *p; - - /* - * Search entire list to see if this file has appeared before. - * If it has, override the timestamp data. - */ - p = bsdtar->archive_dir->head; - while (p != NULL) { - if (strcmp(path, p->name)==0) { - p->mtime_sec = mtime_sec; - p->mtime_nsec = mtime_nsec; - return; - } - p = p->next; - } - - p = malloc(sizeof(*p)); - if (p == NULL) - lafe_errc(1, ENOMEM, "Can't read archive directory"); - - p->name = strdup(path); - if (p->name == NULL) - lafe_errc(1, ENOMEM, "Can't read archive directory"); - p->mtime_sec = mtime_sec; - p->mtime_nsec = mtime_nsec; - p->next = NULL; - if (bsdtar->archive_dir->tail == NULL) { - bsdtar->archive_dir->head = bsdtar->archive_dir->tail = p; - } else { - bsdtar->archive_dir->tail->next = p; - bsdtar->archive_dir->tail = p; - } -} - -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 (bsdtar->create_compression != 0) - lafe_errc(1, 0, - "Cannot append to %s with compression", bsdtar->filename); - - 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"); -*/ - -} |
