From cb3baab306e5951dc3a176fd9061f596a05b4729 Mon Sep 17 00:00:00 2001 From: Tomas Bzatek Date: Sun, 15 Nov 2009 18:32:03 +0100 Subject: Rebase libarchive to 2.7.1 --- libarchive/libarchive-2.5.5/tar/write.c | 1438 ------------------------------- 1 file changed, 1438 deletions(-) delete mode 100644 libarchive/libarchive-2.5.5/tar/write.c (limited to 'libarchive/libarchive-2.5.5/tar/write.c') diff --git a/libarchive/libarchive-2.5.5/tar/write.c b/libarchive/libarchive-2.5.5/tar/write.c deleted file mode 100644 index 1a6e928..0000000 --- a/libarchive/libarchive-2.5.5/tar/write.c +++ /dev/null @@ -1,1438 +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: src/usr.bin/tar/write.c,v 1.70 2008/05/26 17:10:10 kientzle Exp $"); - -#ifdef HAVE_SYS_TYPES_H -#include -#endif -#ifdef HAVE_SYS_ACL_H -#include -#endif -#ifdef HAVE_SYS_IOCTL_H -#include -#endif -#ifdef HAVE_SYS_STAT_H -#include -#endif -#ifdef HAVE_ATTR_XATTR_H -#include -#endif -#ifdef HAVE_ERRNO_H -#include -#endif -#ifdef HAVE_EXT2FS_EXT2_FS_H -#include -#endif -#ifdef HAVE_FCNTL_H -#include -#endif -#ifdef HAVE_FNMATCH_H -#include -#endif -#ifdef HAVE_GRP_H -#include -#endif -#ifdef HAVE_LIMITS_H -#include -#endif -#ifdef HAVE_LINUX_FS_H -#include /* for Linux file flags */ -#endif -#ifdef HAVE_PWD_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 "tree.h" - -/* Fixed size of uname/gname caches. */ -#define name_cache_size 101 - -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 archive_names_from_file_helper(struct bsdtar *bsdtar, - const char *line); -static int copy_file_data(struct bsdtar *bsdtar, - struct archive *a, struct archive *ina); -static void create_cleanup(struct bsdtar *); -static void free_cache(struct name_cache *cache); -static const char * lookup_gname(struct bsdtar *bsdtar, gid_t gid); -static int lookup_gname_helper(struct bsdtar *bsdtar, - const char **name, id_t gid); -static const char * lookup_uname(struct bsdtar *bsdtar, uid_t uid); -static int lookup_uname_helper(struct bsdtar *bsdtar, - const char **name, id_t uid); -static int new_enough(struct bsdtar *, const char *path, - const struct stat *); -static void setup_acls(struct bsdtar *, struct archive_entry *, - const char *path); -static void setup_xattrs(struct bsdtar *, struct archive_entry *, - const char *path); -static void test_for_append(struct bsdtar *); -static void write_archive(struct archive *, struct bsdtar *); -static void write_entry(struct bsdtar *, struct archive *, - const struct stat *, const char *pathname, - const char *accpath); -static void write_entry_backend(struct bsdtar *, struct archive *, - struct archive_entry *, int); -static int write_file_data(struct bsdtar *, struct archive *, - int fd); -static void write_hierarchy(struct bsdtar *, struct archive *, - const char *); - -void -tar_mode_c(struct bsdtar *bsdtar) -{ - struct archive *a; - int r; - - if (*bsdtar->argv == NULL && bsdtar->names_from_file == NULL) - bsdtar_errc(bsdtar, 1, 0, "no files or directories specified"); - - /* We want to catch SIGINFO and SIGUSR1. */ - siginfo_init(bsdtar); - - 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(bsdtar); - } - - /* - * 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: - archive_write_set_compression_none(a); - break; -#ifdef HAVE_LIBBZ2 - case 'j': case 'y': - archive_write_set_compression_bzip2(a); - break; -#endif -#ifdef HAVE_LIBZ - case 'z': - archive_write_set_compression_gzip(a); - break; -#endif - case 'Z': - archive_write_set_compression_compress(a); - break; - default: - bsdtar_errc(bsdtar, 1, 0, - "Unrecognized compression option -%c", - bsdtar->create_compression); - } - } - - r = archive_write_open_file(a, bsdtar->filename); - if (r != ARCHIVE_OK) - bsdtar_errc(bsdtar, 1, 0, archive_error_string(a)); - - write_archive(a, bsdtar); - - if (bsdtar->option_totals) { - fprintf(stderr, "Total bytes written: " BSDTAR_FILESIZE_PRINTF "\n", - (BSDTAR_FILESIZE_TYPE)archive_position_compressed(a)); - } - - archive_write_finish(a); - - /* Restore old SIGINFO + SIGUSR1 handlers. */ - siginfo_done(bsdtar); -} - -/* - * Same as 'c', except we only support tar or empty formats in - * uncompressed files on disk. - */ -void -tar_mode_r(struct bsdtar *bsdtar) -{ - off_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); - - /* We want to catch SIGINFO and SIGUSR1. */ - siginfo_init(bsdtar); - - format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED; - - bsdtar->fd = open(bsdtar->filename, O_RDWR | O_CREAT, 0666); - if (bsdtar->fd < 0) - bsdtar_errc(bsdtar, 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) - bsdtar_errc(bsdtar, 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); - bsdtar_errc(bsdtar, 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) { - bsdtar_errc(bsdtar, 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); - } - lseek(bsdtar->fd, end_offset, SEEK_SET); /* XXX check return val XXX */ - archive_write_open_fd(a, bsdtar->fd); /* XXX check return val XXX */ - - write_archive(a, bsdtar); /* XXX check return val XXX */ - - if (bsdtar->option_totals) { - fprintf(stderr, "Total bytes written: " BSDTAR_FILESIZE_PRINTF "\n", - (BSDTAR_FILESIZE_TYPE)archive_position_compressed(a)); - } - - archive_write_finish(a); - close(bsdtar->fd); - bsdtar->fd = -1; -} - -void -tar_mode_u(struct bsdtar *bsdtar) -{ - off_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); - - /* We want to catch SIGINFO and SIGUSR1. */ - siginfo_init(bsdtar); - - bsdtar->fd = open(bsdtar->filename, O_RDWR); - if (bsdtar->fd < 0) - bsdtar_errc(bsdtar, 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) { - bsdtar_errc(bsdtar, 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); - bsdtar_errc(bsdtar, 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); - lseek(bsdtar->fd, end_offset, SEEK_SET); - ftruncate(bsdtar->fd, end_offset); - archive_write_open_fd(a, bsdtar->fd); - - write_archive(a, bsdtar); - - if (bsdtar->option_totals) { - fprintf(stderr, "Total bytes written: " BSDTAR_FILESIZE_PRINTF "\n", - (BSDTAR_FILESIZE_TYPE)archive_position_compressed(a)); - } - - archive_write_finish(a); - 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; - - if ((bsdtar->resolver = archive_entry_linkresolver_new()) == NULL) - bsdtar_errc(bsdtar, 1, 0, "cannot create link resolver"); - archive_entry_linkresolver_set_strategy(bsdtar->resolver, - archive_format(a)); - - 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) { - bsdtar_warnc(bsdtar, 1, 0, - "Missing argument for -C"); - bsdtar->return_value = 1; - return; - } - } - 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) { - int fd = -1; - write_entry_backend(bsdtar, a, entry, fd); - archive_entry_free(entry); - entry = NULL; - archive_entry_linkify(bsdtar->resolver, &entry, &sparse_entry); - } - - create_cleanup(bsdtar); - if (archive_write_close(a)) { - bsdtar_warnc(bsdtar, 0, "%s", archive_error_string(a)); - bsdtar->return_value = 1; - } -} - -/* - * 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. - */ -void -archive_names_from_file(struct bsdtar *bsdtar, struct archive *a) -{ - bsdtar->archive = a; - - bsdtar->next_line_is_dir = 0; - process_lines(bsdtar, bsdtar->names_from_file, - archive_names_from_file_helper); - if (bsdtar->next_line_is_dir) - bsdtar_errc(bsdtar, 1, errno, - "Unexpected end of filename list; " - "directory expected after -C"); -} - -static int -archive_names_from_file_helper(struct bsdtar *bsdtar, const char *line) -{ - 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, bsdtar->archive, line); - } - return (0); -} - -/* - * 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)) { - bsdtar_warnc(bsdtar, 0, "%s", archive_error_string(ina)); - bsdtar->return_value = 1; - return (0); - } - - rc = append_archive(bsdtar, a, ina); - - if (archive_errno(ina)) { - bsdtar_warnc(bsdtar, 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 (0 == archive_read_next_header(ina, &in_entry)) { - if (!new_enough(bsdtar, archive_entry_pathname(in_entry), - archive_entry_stat(in_entry))) - continue; - if (excluded(bsdtar, 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)); - siginfo_setinfo(bsdtar, "copying", - archive_entry_pathname(in_entry), - archive_entry_size(in_entry)); - siginfo_printinfo(bsdtar, 0); - - e = archive_write_header(a, in_entry); - if (e != ARCHIVE_OK) { - if (!bsdtar->verbose) - bsdtar_warnc(bsdtar, 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)) - exit(1); - } - - if (bsdtar->verbose) - fprintf(stderr, "\n"); - } - - /* Note: If we got here, we saw no write errors, so return success. */ - return (0); -} - -/* Helper function to copy data between archives. */ -static int -copy_file_data(struct bsdtar *bsdtar, struct archive *a, struct archive *ina) -{ - char buff[64*1024]; - ssize_t bytes_read; - ssize_t bytes_written; - off_t progress = 0; - - bytes_read = archive_read_data(ina, buff, sizeof(buff)); - while (bytes_read > 0) { - siginfo_printinfo(bsdtar, progress); - - bytes_written = archive_write_data(a, buff, bytes_read); - if (bytes_written < bytes_read) { - bsdtar_warnc(bsdtar, 0, "%s", archive_error_string(a)); - return (-1); - } - progress += bytes_written; - bytes_read = archive_read_data(ina, buff, sizeof(buff)); - } - - 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 tree *tree; - char symlink_mode = bsdtar->symlink_mode; - dev_t first_dev = 0; - int dev_recorded = 0; - int tree_ret; -#ifdef __linux - int fd, r; - unsigned long fflags; -#endif - - tree = tree_open(path); - - if (!tree) { - bsdtar_warnc(bsdtar, errno, "%s: Cannot open", path); - bsdtar->return_value = 1; - return; - } - - while ((tree_ret = tree_next(tree))) { - const char *name = tree_current_path(tree); - const struct stat *st = NULL, *lst = NULL; - int descend; - - if (tree_ret == TREE_ERROR_DIR) - bsdtar_warnc(bsdtar, errno, "%s: Couldn't visit directory", name); - if (tree_ret != TREE_REGULAR) - continue; - lst = tree_current_lstat(tree); - if (lst == NULL) { - /* Couldn't lstat(); must not exist. */ - bsdtar_warnc(bsdtar, errno, "%s: Cannot stat", name); - - /* - * Report an error via the exit code if the failed - * path is a prefix of what the user provided via - * the command line. (Testing for string equality - * here won't work due to trailing '/' characters.) - */ - if (memcmp(name, path, strlen(name)) == 0) - bsdtar->return_value = 1; - - continue; - } - if (S_ISLNK(lst->st_mode)) - st = tree_current_stat(tree); - /* Default: descend into any dir or symlink to dir. */ - /* We'll adjust this later on. */ - descend = 0; - if ((st != NULL) && S_ISDIR(st->st_mode)) - descend = 1; - if ((lst != NULL) && S_ISDIR(lst->st_mode)) - descend = 1; - - /* - * If user has asked us not to cross mount points, - * then don't descend into into a dir on a different - * device. - */ - if (!dev_recorded) { - first_dev = lst->st_dev; - dev_recorded = 1; - } - if (bsdtar->option_dont_traverse_mounts) { - if (lst != NULL && lst->st_dev != first_dev) - descend = 0; - } - - /* - * If this file/dir is flagged "nodump" and we're - * honoring such flags, skip this file/dir. - */ -#ifdef HAVE_CHFLAGS - if (bsdtar->option_honor_nodump && - (lst->st_flags & UF_NODUMP)) - continue; -#endif - -#ifdef __linux - /* - * Linux has a nodump flag too but to read it - * we have to open() the file/dir and do an ioctl on it... - */ - if (bsdtar->option_honor_nodump && - ((fd = open(name, O_RDONLY|O_NONBLOCK)) >= 0) && - ((r = ioctl(fd, EXT2_IOC_GETFLAGS, &fflags)), - close(fd), r) >= 0 && - (fflags & EXT2_NODUMP_FL)) - continue; -#endif - - /* - * If this file/dir is excluded by a filename - * pattern, skip it. - */ - if (excluded(bsdtar, name)) - continue; - - /* - * If the user vetoes this file/directory, skip it. - */ - if (bsdtar->option_interactive && - !yes("add '%s'", name)) - continue; - - /* - * If this is a dir, decide whether or not to recurse. - */ - if (bsdtar->option_no_subdirs) - descend = 0; - - /* - * 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. */ - /* 'L': Archive symlink to file as file. */ - lst = tree_current_stat(tree); - /* If stat fails, we have a broken symlink; - * in that case, archive the link as such. */ - if (lst == NULL) - lst = tree_current_lstat(tree); - break; - default: - /* 'P': Don't descend through a symlink to dir. */ - if (!S_ISDIR(lst->st_mode)) - descend = 0; - /* 'P': Archive symlink to file as symlink. */ - /* lst = tree_current_lstat(tree); */ - break; - } - - if (descend) - tree_descend(tree); - - /* - * Write the entry. Note that write_entry() handles - * pathname editing and newness testing. - */ - write_entry(bsdtar, a, lst, name, - tree_current_access_path(tree)); - } - tree_close(tree); -} - -/* - * Backend for write_entry. - */ -static void -write_entry_backend(struct bsdtar *bsdtar, struct archive *a, - struct archive_entry *entry, int fd) -{ - int e; - - if (fd == -1 && archive_entry_size(entry) > 0) { - const char *pathname = archive_entry_sourcepath(entry); - fd = open(pathname, O_RDONLY); - if (fd == -1) { - if (!bsdtar->verbose) - bsdtar_warnc(bsdtar, 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) - bsdtar_warnc(bsdtar, 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, fd)) - exit(1); - close(fd); - } -} - -/* - * Add a single filesystem object to the archive. - */ -static void -write_entry(struct bsdtar *bsdtar, struct archive *a, const struct stat *st, - const char *pathname, const char *accpath) -{ - struct archive_entry *entry, *sparse_entry; - int fd; -#ifdef __linux - int r; - unsigned long stflags; -#endif - static char linkbuffer[PATH_MAX+1]; - - fd = -1; - entry = archive_entry_new(); - - archive_entry_set_pathname(entry, pathname); - archive_entry_copy_sourcepath(entry, accpath); - - /* - * Rewrite the pathname to be archived. If rewrite - * fails, skip the entry. - */ - if (edit_pathname(bsdtar, entry)) - goto abort; - - /* - * 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, archive_entry_pathname(entry), st)) - goto abort; - - /* Display entry as we process it. This format is required by SUSv2. */ - if (bsdtar->verbose) - safe_fprintf(stderr, "a %s", archive_entry_pathname(entry)); - - /* Read symbolic link information. */ - if ((st->st_mode & S_IFMT) == S_IFLNK) { - int lnklen; - - lnklen = readlink(accpath, linkbuffer, PATH_MAX); - if (lnklen < 0) { - if (!bsdtar->verbose) - bsdtar_warnc(bsdtar, errno, - "%s: Couldn't read symbolic link", - pathname); - else - safe_fprintf(stderr, - ": Couldn't read symbolic link: %s", - strerror(errno)); - goto cleanup; - } - linkbuffer[lnklen] = 0; - archive_entry_set_symlink(entry, linkbuffer); - } - - /* Look up username and group name. */ - archive_entry_set_uname(entry, lookup_uname(bsdtar, st->st_uid)); - archive_entry_set_gname(entry, lookup_gname(bsdtar, st->st_gid)); - -#ifdef HAVE_CHFLAGS - if (st->st_flags != 0) - archive_entry_set_fflags(entry, st->st_flags, 0); -#endif - -#ifdef __linux - if ((S_ISREG(st->st_mode) || S_ISDIR(st->st_mode)) && - ((fd = open(accpath, O_RDONLY|O_NONBLOCK)) >= 0) && - ((r = ioctl(fd, EXT2_IOC_GETFLAGS, &stflags)), close(fd), (fd = -1), r) >= 0 && - stflags) { - archive_entry_set_fflags(entry, stflags, 0); - } -#endif - - archive_entry_copy_stat(entry, st); - setup_acls(bsdtar, entry, accpath); - setup_xattrs(bsdtar, entry, accpath); - - /* Non-regular files get archived with zero size. */ - if (!S_ISREG(st->st_mode)) - archive_entry_set_size(entry, 0); - - /* Record what we're doing, for the benefit of SIGINFO / SIGUSR1. */ - siginfo_setinfo(bsdtar, "adding", archive_entry_pathname(entry), - archive_entry_size(entry)); - archive_entry_linkify(bsdtar->resolver, &entry, &sparse_entry); - - /* Handle SIGINFO / SIGUSR1 request if one was made. */ - siginfo_printinfo(bsdtar, 0); - - while (entry != NULL) { - write_entry_backend(bsdtar, a, entry, fd); - fd = -1; - archive_entry_free(entry); - entry = sparse_entry; - sparse_entry = NULL; - } - -cleanup: - if (bsdtar->verbose) - fprintf(stderr, "\n"); - -abort: - if (fd >= 0) - close(fd); - - archive_entry_free(entry); -} - - -/* Helper function to copy file to archive, with stack-allocated buffer. */ -static int -write_file_data(struct bsdtar *bsdtar, struct archive *a, int fd) -{ - char buff[64*1024]; - ssize_t bytes_read; - ssize_t bytes_written; - off_t progress = 0; - - /* XXX TODO: Allocate buffer on heap and store pointer to - * it in bsdtar structure; arrange cleanup as well. XXX */ - - bytes_read = read(fd, buff, sizeof(buff)); - while (bytes_read > 0) { - siginfo_printinfo(bsdtar, progress); - - bytes_written = archive_write_data(a, buff, bytes_read); - if (bytes_written < 0) { - /* Write failed; this is bad */ - bsdtar_warnc(bsdtar, 0, "%s", archive_error_string(a)); - return (-1); - } - if (bytes_written < bytes_read) { - /* Write was truncated; warn but continue. */ - bsdtar_warnc(bsdtar, 0, - "Truncated write; file may have grown while being archived."); - return (0); - } - progress += bytes_written; - bytes_read = read(fd, buff, sizeof(buff)); - } - return 0; -} - - -static void -create_cleanup(struct bsdtar *bsdtar) -{ - free_cache(bsdtar->uname_cache); - bsdtar->uname_cache = NULL; - free_cache(bsdtar->gname_cache); - bsdtar->gname_cache = NULL; -} - -#ifdef HAVE_POSIX_ACL -static void setup_acl(struct bsdtar *bsdtar, - struct archive_entry *entry, const char *accpath, - int acl_type, int archive_entry_acl_type); - -static void -setup_acls(struct bsdtar *bsdtar, struct archive_entry *entry, - const char *accpath) -{ - archive_entry_acl_clear(entry); - - setup_acl(bsdtar, entry, accpath, - ACL_TYPE_ACCESS, ARCHIVE_ENTRY_ACL_TYPE_ACCESS); - /* Only directories can have default ACLs. */ - if (S_ISDIR(archive_entry_mode(entry))) - setup_acl(bsdtar, entry, accpath, - ACL_TYPE_DEFAULT, ARCHIVE_ENTRY_ACL_TYPE_DEFAULT); -} - -static void -setup_acl(struct bsdtar *bsdtar, struct archive_entry *entry, - const char *accpath, int acl_type, int archive_entry_acl_type) -{ - acl_t acl; - acl_tag_t acl_tag; - acl_entry_t acl_entry; - acl_permset_t acl_permset; - int s, ae_id, ae_tag, ae_perm; - const char *ae_name; - - /* Retrieve access ACL from file. */ - acl = acl_get_file(accpath, acl_type); - if (acl != NULL) { - s = acl_get_entry(acl, ACL_FIRST_ENTRY, &acl_entry); - while (s == 1) { - ae_id = -1; - ae_name = NULL; - - acl_get_tag_type(acl_entry, &acl_tag); - if (acl_tag == ACL_USER) { - ae_id = (int)*(uid_t *)acl_get_qualifier(acl_entry); - ae_name = lookup_uname(bsdtar, ae_id); - ae_tag = ARCHIVE_ENTRY_ACL_USER; - } else if (acl_tag == ACL_GROUP) { - ae_id = (int)*(gid_t *)acl_get_qualifier(acl_entry); - ae_name = lookup_gname(bsdtar, ae_id); - ae_tag = ARCHIVE_ENTRY_ACL_GROUP; - } else if (acl_tag == ACL_MASK) { - ae_tag = ARCHIVE_ENTRY_ACL_MASK; - } else if (acl_tag == ACL_USER_OBJ) { - ae_tag = ARCHIVE_ENTRY_ACL_USER_OBJ; - } else if (acl_tag == ACL_GROUP_OBJ) { - ae_tag = ARCHIVE_ENTRY_ACL_GROUP_OBJ; - } else if (acl_tag == ACL_OTHER) { - ae_tag = ARCHIVE_ENTRY_ACL_OTHER; - } else { - /* Skip types that libarchive can't support. */ - continue; - } - - acl_get_permset(acl_entry, &acl_permset); - ae_perm = 0; - /* - * acl_get_perm() is spelled differently on different - * platforms; see bsdtar_platform.h for details. - */ - if (ACL_GET_PERM(acl_permset, ACL_EXECUTE)) - ae_perm |= ARCHIVE_ENTRY_ACL_EXECUTE; - if (ACL_GET_PERM(acl_permset, ACL_READ)) - ae_perm |= ARCHIVE_ENTRY_ACL_READ; - if (ACL_GET_PERM(acl_permset, ACL_WRITE)) - ae_perm |= ARCHIVE_ENTRY_ACL_WRITE; - - archive_entry_acl_add_entry(entry, - archive_entry_acl_type, ae_perm, ae_tag, - ae_id, ae_name); - - s = acl_get_entry(acl, ACL_NEXT_ENTRY, &acl_entry); - } - acl_free(acl); - } -} -#else -static void -setup_acls(struct bsdtar *bsdtar, struct archive_entry *entry, - const char *accpath) -{ - (void)bsdtar; - (void)entry; - (void)accpath; -} -#endif - -#if HAVE_LISTXATTR && HAVE_LLISTXATTR && HAVE_GETXATTR && HAVE_LGETXATTR - -static void -setup_xattr(struct bsdtar *bsdtar, struct archive_entry *entry, - const char *accpath, const char *name) -{ - size_t size; - void *value = NULL; - char symlink_mode = bsdtar->symlink_mode; - - if (symlink_mode == 'H') - size = getxattr(accpath, name, NULL, 0); - else - size = lgetxattr(accpath, name, NULL, 0); - - if (size == -1) { - bsdtar_warnc(bsdtar, errno, "Couldn't get extended attribute"); - return; - } - - if (size > 0 && (value = malloc(size)) == NULL) { - bsdtar_errc(bsdtar, 1, errno, "Out of memory"); - return; - } - - if (symlink_mode == 'H') - size = getxattr(accpath, name, value, size); - else - size = lgetxattr(accpath, name, value, size); - - if (size == -1) { - bsdtar_warnc(bsdtar, errno, "Couldn't get extended attribute"); - return; - } - - archive_entry_xattr_add_entry(entry, name, value, size); - - free(value); -} - -/* - * Linux extended attribute support - */ -static void -setup_xattrs(struct bsdtar *bsdtar, struct archive_entry *entry, - const char *accpath) -{ - char *list, *p; - size_t list_size; - char symlink_mode = bsdtar->symlink_mode; - - if (symlink_mode == 'H') - list_size = listxattr(accpath, NULL, 0); - else - list_size = llistxattr(accpath, NULL, 0); - - if (list_size == -1) { - bsdtar_warnc(bsdtar, errno, - "Couldn't list extended attributes"); - return; - } else if (list_size == 0) - return; - - if ((list = malloc(list_size)) == NULL) { - bsdtar_errc(bsdtar, 1, errno, "Out of memory"); - return; - } - - if (symlink_mode == 'H') - list_size = listxattr(accpath, list, list_size); - else - list_size = llistxattr(accpath, list, list_size); - - if (list_size == -1) { - bsdtar_warnc(bsdtar, errno, - "Couldn't list extended attributes"); - free(list); - return; - } - - for (p = list; (p - list) < list_size; p += strlen(p) + 1) { - if (strncmp(p, "system.", 7) == 0 || - strncmp(p, "xfsroot.", 8) == 0) - continue; - - setup_xattr(bsdtar, entry, accpath, p); - } - - free(list); -} - -#else - -/* - * Generic (stub) extended attribute support. - */ -static void -setup_xattrs(struct bsdtar *bsdtar, struct archive_entry *entry, - const char *accpath) -{ - (void)bsdtar; /* UNUSED */ - (void)entry; /* UNUSED */ - (void)accpath; /* UNUSED */ -} - -#endif - -static void -free_cache(struct name_cache *cache) -{ - size_t i; - - if (cache != NULL) { - for (i = 0; i < cache->size; i++) { - if (cache->cache[i].name != NULL && - cache->cache[i].name != NO_NAME) - free((void *)(uintptr_t)cache->cache[i].name); - } - free(cache); - } -} - -/* - * Lookup uid/gid from uname/gname, return NULL if no match. - */ -static const char * -lookup_name(struct bsdtar *bsdtar, struct name_cache **name_cache_variable, - int (*lookup_fn)(struct bsdtar *, const char **, id_t), id_t id) -{ - struct name_cache *cache; - const char *name; - int slot; - - - if (*name_cache_variable == NULL) { - *name_cache_variable = malloc(sizeof(struct name_cache)); - if (*name_cache_variable == NULL) - bsdtar_errc(bsdtar, 1, ENOMEM, "No more memory"); - memset(*name_cache_variable, 0, sizeof(struct name_cache)); - (*name_cache_variable)->size = name_cache_size; - } - - cache = *name_cache_variable; - cache->probes++; - - slot = id % cache->size; - if (cache->cache[slot].name != NULL) { - if (cache->cache[slot].id == id) { - cache->hits++; - if (cache->cache[slot].name == NO_NAME) - return (NULL); - return (cache->cache[slot].name); - } - if (cache->cache[slot].name != NO_NAME) - free((void *)(uintptr_t)cache->cache[slot].name); - cache->cache[slot].name = NULL; - } - - if (lookup_fn(bsdtar, &name, id) == 0) { - if (name == NULL || name[0] == '\0') { - /* Cache the negative response. */ - cache->cache[slot].name = NO_NAME; - cache->cache[slot].id = id; - } else { - cache->cache[slot].name = strdup(name); - if (cache->cache[slot].name != NULL) { - cache->cache[slot].id = id; - return (cache->cache[slot].name); - } - /* - * Conveniently, NULL marks an empty slot, so - * if the strdup() fails, we've just failed to - * cache it. No recovery necessary. - */ - } - } - return (NULL); -} - -static const char * -lookup_uname(struct bsdtar *bsdtar, uid_t uid) -{ - return (lookup_name(bsdtar, &bsdtar->uname_cache, - &lookup_uname_helper, (id_t)uid)); -} - -static int -lookup_uname_helper(struct bsdtar *bsdtar, const char **name, id_t id) -{ - struct passwd *pwent; - - (void)bsdtar; /* UNUSED */ - - errno = 0; - pwent = getpwuid((uid_t)id); - if (pwent == NULL) { - *name = NULL; - if (errno != 0) - bsdtar_warnc(bsdtar, errno, "getpwuid(%d) failed", id); - return (errno); - } - - *name = pwent->pw_name; - return (0); -} - -static const char * -lookup_gname(struct bsdtar *bsdtar, gid_t gid) -{ - return (lookup_name(bsdtar, &bsdtar->gname_cache, - &lookup_gname_helper, (id_t)gid)); -} - -static int -lookup_gname_helper(struct bsdtar *bsdtar, const char **name, id_t id) -{ - struct group *grent; - - (void)bsdtar; /* UNUSED */ - - errno = 0; - grent = getgrgid((gid_t)id); - if (grent == NULL) { - *name = NULL; - if (errno != 0) - bsdtar_warnc(bsdtar, errno, "getgrgid(%d) failed", id); - return (errno); - } - - *name = grent->gr_name; - return (0); -} - -/* - * Test if the specified file is new enough to include in the archive. - */ -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) - bsdtar_errc(bsdtar, 1, ENOMEM, "Can't read archive directory"); - - p->name = strdup(path); - if (p->name == NULL) - bsdtar_errc(bsdtar, 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; - } -} - -void -test_for_append(struct bsdtar *bsdtar) -{ - struct stat s; - - if (*bsdtar->argv == NULL && bsdtar->names_from_file == NULL) - bsdtar_errc(bsdtar, 1, 0, "no files or directories specified"); - if (bsdtar->filename == NULL) - bsdtar_errc(bsdtar, 1, 0, "Cannot append to stdout."); - - if (bsdtar->create_compression != 0) - bsdtar_errc(bsdtar, 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)) - bsdtar_errc(bsdtar, 1, 0, - "Cannot append to %s: not a regular file.", - bsdtar->filename); -} -- cgit v1.2.3