| /*- |
| * 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 1.79 2008/11/27 05:49:52 kientzle Exp $"); |
| |
| #ifdef HAVE_SYS_TYPES_H |
| #include <sys/types.h> |
| #endif |
| #ifdef HAVE_SYS_ACL_H |
| #include <sys/acl.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_FNMATCH_H |
| #include <fnmatch.h> |
| #endif |
| #ifdef HAVE_GRP_H |
| #include <grp.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 |
| #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 "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 |
| |
| 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 int new_enough(struct bsdtar *, const char *path, |
| const struct stat *); |
| 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 *); |
| |
| 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"); |
| |
| 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_LIBLZMA |
| case 'J': |
| archive_write_set_compression_xz(a); |
| break; |
| case OPTION_LZMA: |
| archive_write_set_compression_lzma(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); |
| } |
| } |
| |
| if (ARCHIVE_OK != archive_write_set_options(a, bsdtar->option_options)) |
| bsdtar_errc(bsdtar, 1, 0, archive_error_string(a)); |
| if (ARCHIVE_OK != archive_write_open_file(a, bsdtar->filename)) |
| bsdtar_errc(bsdtar, 1, 0, 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) |
| { |
| 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); |
| |
| 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 */ |
| if (ARCHIVE_OK != archive_write_set_options(a, bsdtar->option_options)) |
| bsdtar_errc(bsdtar, 1, 0, archive_error_string(a)); |
| if (ARCHIVE_OK != archive_write_open_fd(a, bsdtar->fd)) |
| bsdtar_errc(bsdtar, 1, 0, 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) |
| { |
| 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); |
| |
| 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); |
| if (ARCHIVE_OK != archive_write_set_options(a, bsdtar->option_options)) |
| bsdtar_errc(bsdtar, 1, 0, archive_error_string(a)); |
| if (ARCHIVE_OK != archive_write_open_fd(a, bsdtar->fd)) |
| bsdtar_errc(bsdtar, 1, 0, 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; |
| |
| /* We want to catch SIGINFO and SIGUSR1. */ |
| siginfo_init(bsdtar); |
| |
| /* Allocate a buffer for file data. */ |
| if ((bsdtar->buff = malloc(FILEDATABUFLEN)) == NULL) |
| bsdtar_errc(bsdtar, 1, 0, "cannot allocate memory"); |
| |
| 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->diskreader = archive_read_disk_new()) == NULL) |
| bsdtar_errc(bsdtar, 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) { |
| bsdtar_warnc(bsdtar, 1, 0, |
| "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 |
| #if defined(_WIN32) && !defined(__CYGWIN__) |
| write_hierarchy_win(bsdtar, a, arg, |
| write_hierarchy); |
| #else |
| write_hierarchy(bsdtar, a, arg); |
| #endif |
| } |
| 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)) { |
| bsdtar_warnc(bsdtar, 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: " BSDTAR_FILESIZE_PRINTF "\n", |
| (BSDTAR_FILESIZE_TYPE)archive_position_compressed(a)); |
| } |
| |
| archive_write_finish(a); |
| |
| /* Restore old SIGINFO + SIGUSR1 handlers. */ |
| siginfo_done(bsdtar); |
| } |
| |
| /* |
| * 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) |
| { |
| ssize_t bytes_read; |
| ssize_t bytes_written; |
| off_t progress = 0; |
| |
| bytes_read = archive_read_data(ina, bsdtar->buff, FILEDATABUFLEN); |
| while (bytes_read > 0) { |
| siginfo_printinfo(bsdtar, progress); |
| |
| bytes_written = archive_write_data(a, bsdtar->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, 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) { |
| bsdtar_warnc(bsdtar, errno, "%s: Cannot open", path); |
| bsdtar->return_value = 1; |
| return; |
| } |
| |
| while ((tree_ret = tree_next(tree))) { |
| 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) |
| bsdtar_errc(bsdtar, 1, tree_errno(tree), |
| "%s: Unable to continue traversing directory tree", |
| name); |
| if (tree_ret == TREE_ERROR_DIR) { |
| bsdtar_warnc(bsdtar, 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 (excluded(bsdtar, name)) |
| continue; |
| |
| /* |
| * Get lstat() info from the tree library. |
| */ |
| lst = tree_current_lstat(tree); |
| if (lst == NULL) { |
| /* Couldn't lstat(); must not exist. */ |
| bsdtar_warnc(bsdtar, 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 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->st_dev != first_dev) |
| descend = 0; |
| } |
| |
| /* |
| * 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)) |
| 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. */ |
| r = archive_read_disk_entry_from_file(bsdtar->diskreader, |
| entry, -1, st); |
| if (r != ARCHIVE_OK) |
| bsdtar_warnc(bsdtar, archive_errno(bsdtar->diskreader), |
| 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. |
| */ |
| #ifdef HAVE_STRUCT_STAT_ST_FLAGS |
| /* 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); |
| 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; |
| |
| /* Note: if user vetoes, we won't descend. */ |
| if (descend && !bsdtar->option_no_subdirs) |
| 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 (!S_ISREG(st->st_mode)) |
| archive_entry_set_size(entry, 0); |
| |
| /* Record what we're doing, for SIGINFO / SIGUSR1. */ |
| siginfo_setinfo(bsdtar, "adding", |
| archive_entry_pathname(entry), archive_entry_size(entry)); |
| archive_entry_linkify(bsdtar->resolver, &entry, &spare_entry); |
| |
| /* Handle SIGINFO / SIGUSR1 request if one was made. */ |
| siginfo_printinfo(bsdtar, 0); |
| |
| 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); |
| 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, 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); |
| } |
| |
| |
| /* 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; |
| off_t progress = 0; |
| |
| bytes_read = read(fd, bsdtar->buff, FILEDATABUFLEN); |
| while (bytes_read > 0) { |
| siginfo_printinfo(bsdtar, progress); |
| |
| bytes_written = archive_write_data(a, bsdtar->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, |
| "%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); |
| } |
| 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); |
| } |