backup.c

ソースコードを見る。

関数
char *	get_backup_name (char *fname)
static int	make_simple_backup (char *fname)
static int	make_bak_dir (char *fullpath)
static int	robust_move (char *src, char *dst)
static int	keep_backup (char *fname)
int	make_backup (char *fname)
変数
int	verbose
int	backup_dir_len
unsigned int	backup_dir_remainder
char	backup_dir_buf [MAXPATHLEN]
char *	backup_suffix
char *	backup_dir
int	am_root
int	preserve_acls
int	preserve_xattrs
int	preserve_devices
int	preserve_specials
int	preserve_links
int	safe_symlinks

---

関数

char* get_backup_name

(

char *

fname

)

backup.c の 39 行で定義されています。

参照先 backup_dir・backup_dir_buf・backup_dir_len・backup_dir_remainder・backup_suffix・FERROR・rprintf()・stringjoin().

参照元 keep_backup()・make_simple_backup()・recv_files()・recv_generator().

{
        if (backup_dir) {
                if (stringjoin(backup_dir_buf + backup_dir_len, backup_dir_remainder,
                               fname, backup_suffix, NULL) < backup_dir_remainder)
                        return backup_dir_buf;
        } else {
                if (stringjoin(backup_dir_buf, MAXPATHLEN,
                               fname, backup_suffix, NULL) < MAXPATHLEN)
                        return backup_dir_buf;
        }

        rprintf(FERROR, "backup filename too long\n");
        return NULL;
}

static int make_simple_backup

(

char *

fname

)

[static]

backup.c の 56 行で定義されています。

参照先 do_rename()・do_rmdir()・do_unlink()・errno・FERROR・FINFO・get_backup_name()・rprintf()・rsyserr()・verbose.

参照元 make_backup().

{
        int rename_errno;
        char *fnamebak = get_backup_name(fname);

        if (!fnamebak)
                return 0;

        while (1) {
                if (do_rename(fname, fnamebak) == 0) {
                        if (verbose > 1) {
                                rprintf(FINFO, "backed up %s to %s\n",
                                        fname, fnamebak);
                        }
                        break;
                }
                /* cygwin (at least version b19) reports EINVAL */
                if (errno == ENOENT || errno == EINVAL)
                        break;

                rename_errno = errno;
                if (errno == EISDIR && do_rmdir(fnamebak) == 0)
                        continue;
                if (errno == ENOTDIR && do_unlink(fnamebak) == 0)
                        continue;

                rsyserr(FERROR, rename_errno, "rename %s to backup %s",
                        fname, fnamebak);
                errno = rename_errno;
                return 0;
        }

        return 1;
}

static int make_bak_dir

(

char *

fullpath

)

[static]

backup.c の 96 行で定義されています。

参照先 backup_dir_len・do_chmod()・do_lchown()・do_stat()・dup_acl()・dup_xattr()・errno・FERROR・full_fname()・mkdir_defmode()・preserve_acls・preserve_xattrs・rsyserr().

参照元 keep_backup()・robust_move().

{
        STRUCT_STAT st;
        char *rel = fullpath + backup_dir_len;
        char *end = rel + strlen(rel);
        char *p = end;

        while (strncmp(fullpath, "./", 2) == 0)
                fullpath += 2;

        /* Try to find an existing dir, starting from the deepest dir. */
        while (1) {
                if (--p == fullpath) {
                        p += strlen(p);
                        goto failure;
                }
                if (*p == '/') {
                        *p = '\0';
                        if (mkdir_defmode(fullpath) == 0)
                                break;
                        if (errno != ENOENT) {
                                rsyserr(FERROR, errno,
                                        "make_bak_dir mkdir %s failed",
                                        full_fname(fullpath));
                                goto failure;
                        }
                }
        }

        /* Make all the dirs that we didn't find on the way here. */
        while (1) {
                if (p >= rel) {
                        /* Try to transfer the directory settings of the
                         * actual dir that the files are coming from. */
                        if (do_stat(rel, &st) < 0) {
                                rsyserr(FERROR, errno,
                                        "make_bak_dir stat %s failed",
                                        full_fname(rel));
                        } else {
                                do_lchown(fullpath, st.st_uid, st.st_gid);
                                do_chmod(fullpath, st.st_mode);
#ifdef SUPPORT_ACLS
                                if (preserve_acls)
                                        dup_acl(end, fullpath, st.st_mode);
#endif
#ifdef SUPPORT_XATTRS
                                if (preserve_xattrs)
                                        dup_xattr(end, fullpath );
#endif
                        }
                }
                *p = '/';
                p += strlen(p);
                if (p == end)
                        break;
                if (mkdir_defmode(fullpath) < 0) {
                        rsyserr(FERROR, errno, "make_bak_dir mkdir %s failed",
                                full_fname(fullpath));
                        goto failure;
                }
        }
        return 0;

  failure:
        while (p != end) {
                *p = '/';
                p += strlen(p);
        }
        return -1;
}

static int robust_move	(	char *	src,
		char *	dst
	)			[static]

backup.c の 168 行で定義されています。

参照先 errno・make_bak_dir()・robust_rename().

参照元 keep_backup().

{
        if (robust_rename(src, dst, NULL, 0755) < 0
         && (errno != ENOENT || make_bak_dir(dst) < 0
          || robust_rename(src, dst, NULL, 0755) < 0))
                return -1;
        return 0;
}

static int keep_backup

(

char *

fname

)

[static]

backup.c の 180 行で定義されています。

参照先 am_root・buf・cleanup_keep_backup_acl()・cleanup_keep_backup_xattr()・do_lstat()・do_mkdir()・do_mknod()・do_rmdir()・do_symlink()・do_unlink()・errno・FERROR・FINFO・full_fname()・get_backup_name()・make_bak_dir()・make_file()・preserve_acls・preserve_devices・preserve_links・preserve_specials・preserve_xattrs・push_keep_backup_acl()・push_keep_backup_xattr()・robust_move()・robust_unlink()・rprintf()・rsyserr()・safe_symlinks・set_file_attrs()・unsafe_symlink()・verbose.

参照元 make_backup().

{
        STRUCT_STAT st;
        struct file_struct *file;
        char *buf;
        int kept = 0;
        int ret_code;

        /* return if no file to keep */
        if (do_lstat(fname, &st) < 0)
                return 1;

        if (!(file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
                return 1; /* the file could have disappeared */

        if (!(buf = get_backup_name(fname)))
                return 0;

#ifdef SUPPORT_ACLS
        if (preserve_acls)
                push_keep_backup_acl(file, fname, buf);
#endif
#ifdef SUPPORT_XATTRS
        if (preserve_xattrs)
                push_keep_backup_xattr(file, fname, buf);
#endif

        /* Check to see if this is a device file, or link */
        if ((am_root && preserve_devices && IS_DEVICE(file->mode))
         || (preserve_specials && IS_SPECIAL(file->mode))) {
                do_unlink(buf);
                if (do_mknod(buf, file->mode, file->u.rdev) < 0
                    && (errno != ENOENT || make_bak_dir(buf) < 0
                     || do_mknod(buf, file->mode, file->u.rdev) < 0)) {
                        rsyserr(FERROR, errno, "mknod %s failed",
                                full_fname(buf));
                } else if (verbose > 2) {
                        rprintf(FINFO, "make_backup: DEVICE %s successful.\n",
                                fname);
                }
                kept = 1;
                do_unlink(fname);
        }

        if (!kept && S_ISDIR(file->mode)) {
                /* make an empty directory */
                if (do_mkdir(buf, file->mode) < 0
                    && (errno != ENOENT || make_bak_dir(buf) < 0
                     || do_mkdir(buf, file->mode) < 0)) {
                        rsyserr(FINFO, errno, "mkdir %s failed",
                                full_fname(buf));
                }

                ret_code = do_rmdir(fname);
                if (verbose > 2) {
                        rprintf(FINFO, "make_backup: RMDIR %s returns %i\n",
                                full_fname(fname), ret_code);
                }
                kept = 1;
        }

#ifdef SUPPORT_LINKS
        if (!kept && preserve_links && S_ISLNK(file->mode)) {
                if (safe_symlinks && unsafe_symlink(file->u.link, buf)) {
                        if (verbose) {
                                rprintf(FINFO, "ignoring unsafe symlink %s -> %s\n",
                                        full_fname(buf), file->u.link);
                        }
                        kept = 1;
                } else {
                        do_unlink(buf);
                        if (do_symlink(file->u.link, buf) < 0
                            && (errno != ENOENT || make_bak_dir(buf) < 0
                             || do_symlink(file->u.link, buf) < 0)) {
                                rsyserr(FERROR, errno, "link %s -> \"%s\"",
                                        full_fname(buf),
                                        file->u.link);
                        }
                        do_unlink(fname);
                        kept = 1;
                }
        }
#endif

        if (!kept && !S_ISREG(file->mode)) {
                rprintf(FINFO, "make_bak: skipping non-regular file %s\n",
                        fname);
                return 1;
        }

        /* move to keep tree if a file */
        if (!kept) {
                if (robust_move(fname, buf) != 0) {
                        rsyserr(FERROR, errno, "keep_backup failed: %s -> \"%s\"",
                                full_fname(fname), buf);
                } else if (st.st_nlink > 1) {
                        /* If someone has hard-linked the file into the backup
                         * dir, rename() might return success but do nothing! */
                        robust_unlink(fname); /* Just in case... */
                }
        }
        set_file_attrs(buf, file, NULL, 0);
#ifdef SUPPORT_ACLS
        if (preserve_acls)
                cleanup_keep_backup_acl();
#endif
#ifdef SUPPORT_XATTRS
        if (preserve_xattrs)
                cleanup_keep_backup_xattr();
#endif
        free(file);

        if (verbose > 1) {
                rprintf(FINFO, "backed up %s to %s\n",
                        fname, buf);
        }
        return 1;
}

int make_backup

(

char *

fname

)

backup.c の 301 行で定義されています。

参照先 backup_dir・keep_backup()・make_simple_backup().

参照元 delete_item()・finish_transfer()・handle_delayed_updates()・maybe_hard_link().

{
        if (backup_dir)
                return keep_backup(fname);
        return make_simple_backup(fname);
}

---

変数

int verbose

options.c の 163 行で定義されています。

参照元 _exit_cleanup()・add_rule()・clean_flist()・client_run()・default_perms_for_dir()・delete_in_dir()・do_cmd()・do_delete_pass()・do_server_recv()・do_server_sender()・expand_file_acl_index_list()・expand_ida_list()・expand_rsync_acl_list()・expand_smb_acl_list()・find_fuzzy()・finish_transfer()・flist_expand()・generate_and_send_sums()・generate_files()・get_dirlist()・get_local_name()・handle_delayed_updates()・handle_stats()・hard_link_check()・hard_link_one()・hash_search()・is_in_group()・itemize()・keep_backup()・log_delete()・make_file()・make_simple_backup()・match_report()・match_sums()・matched()・maybe_log_item()・open_socket_in()・open_socket_out()・open_socket_out_wrapped()・output_summary()・parse_arguments()・parse_filter_file()・parse_rule()・piped_child()・pop_local_filters()・push_local_filters()・read_stream_flags()・readlink_stat()・receive_data()・receive_sums()・receive_xattr()・recv_add_gid()・recv_add_uid()・recv_file_list()・recv_files()・recv_generator()・report_filter_result()・robust_unlink()・rsync_module()・send_file_list()・send_files()・server_options()・set_file_attrs()・set_modtime()・setup_iconv()・setup_protocol()・show_filelist_p()・sock_exec()・start_client()・start_filelist_progress()・start_inband_exchange()・successful_send()・sum_sizes_sqroot()・try_dests_non()・try_dests_reg().

int backup_dir_len

options.c の 140 行で定義されています。

参照元 get_backup_name()・make_bak_dir().

unsigned int backup_dir_remainder

options.c の 142 行で定義されています。

参照元 get_backup_name().

char backup_dir_buf[MAXPATHLEN]

options.c の 154 行で定義されています。

参照元 get_backup_name().

char* backup_suffix

options.c の 144 行で定義されています。

参照元 get_backup_name()・is_backup_file()・server_options().

char* backup_dir

options.c の 153 行で定義されています。

参照元 delete_item()・get_backup_name()・make_backup()・parse_arguments()・server_options().

int am_root

options.c の 74 行で定義されています。

int preserve_acls

options.c の 48 行で定義されています。

int preserve_xattrs

options.c の 49 行で定義されています。

参照元 keep_backup()・make_bak_dir()・parse_arguments()・recv_file_list()・send_file_name()・server_options()・set_file_attrs().

int preserve_devices

options.c の 52 行で定義されています。

参照元 keep_backup()・make_file()・parse_arguments()・receive_file_entry()・recv_generator()・send_file_entry()・server_options().

int preserve_specials

options.c の 53 行で定義されています。

参照元 keep_backup()・make_file()・parse_arguments()・receive_file_entry()・recv_generator()・send_file_entry()・server_options().

int preserve_links

options.c の 46 行で定義されています。

参照元 keep_backup()・list_file_entry()・parse_arguments()・receive_file_entry()・recv_generator()・send_file_entry()・server_options().

int safe_symlinks

options.c の 99 行で定義されています。

参照元 keep_backup()・recv_generator()・server_options().

---