mkisofs.c

创建一个符合iso-9660标准的iso文件系统

	if (merge_image != NULL && apple_hyb) {
#ifdef	USE_LIBSCHILY
		errmsgno(EX_BAD,
		"Warning: files from previous sessions will not be included in the HFS volume.\n");
#else
		fprintf(stderr,
		"Warning: files from previous sessions will not be included in the HFS volume.\n");
#endif
	}
#endif	/* APPLE_HYB */

	/*
	 * see if we have a list of pathnames to process
	 */
	if (pathnames) {
		/* "-" means take list from the standard input */
		if (strcmp(pathnames, "-")) {
			if ((pfp = fopen(pathnames, "r")) == NULL) {
#ifdef	USE_LIBSCHILY
				comerr("Unable to open pathname list %s.\n",
								pathnames);
#else
				fprintf(stderr,
					"Unable to open pathname list %s.\n",
								pathnames);
				exit(1);
#endif
			}
		} else
			pfp = stdin;
	}

	/* The first step is to scan the directory tree, and take some notes */

	if ((arg = get_pnames(argc, argv, optind, pname,
						sizeof(pname), pfp)) == NULL) {
#ifdef	USE_LIBSCHILY
		errmsgno(EX_BAD, "Missing pathspec.\n");
#endif
		usage(1);
	}

	/*
	 * if we don't have a pathspec, then save the pathspec found
	 * in the pathnames file (stored in pname) - we don't want
	 * to skip this pathspec when we read the pathnames file again
	 */
	if (!have_cmd_line_pathspec) {
		save_pname = 1;
	}

	if (use_RockRidge) {
#if 1
		extension_record = generate_rr_extension_record("RRIP_1991A",
			"THE ROCK RIDGE INTERCHANGE PROTOCOL PROVIDES SUPPORT FOR POSIX FILE SYSTEM SEMANTICS",
			"PLEASE CONTACT DISC PUBLISHER FOR SPECIFICATION SOURCE.  SEE PUBLISHER IDENTIFIER IN PRIMARY VOLUME DESCRIPTOR FOR CONTACT INFORMATION.",
			&extension_record_size);
#else
		extension_record = generate_rr_extension_record("IEEE_P1282",
			"THE IEEE P1282 PROTOCOL PROVIDES SUPPORT FOR POSIX FILE SYSTEM SEMANTICS",
			"PLEASE CONTACT THE IEEE STANDARDS DEPARTMENT, PISCATAWAY, NJ, USA FOR THE P1282 SPECIFICATION.",
			&extension_record_size);
#endif
	}
	if (log_file) {
		FILE		*lfp;
		int		i;

		/* open log file - test that we can open OK */
		if ((lfp = fopen(log_file, "w")) == NULL) {
#ifdef	USE_LIBSCHILY
			comerr("can't open logfile: %s\n", log_file);
#else
			fprintf(stderr, "can't open logfile: %s\n", log_file);
			exit(1);
#endif
		}
		fclose(lfp);

		/* redirect all stderr message to log_file */
		fprintf(stderr, "re-directing all messages to %s\n", log_file);
		fflush(stderr);

		/* associate stderr with the log file */
		if (freopen(log_file, "w", stderr) == NULL) {
#ifdef	USE_LIBSCHILY
			comerr("can't open logfile: %s\n", log_file);
#else
			fprintf(stderr, "can't open logfile: %s\n", log_file);
			exit(1);
#endif
		}
		if (verbose > 1) {
			for (i = 0; i < argc; i++)
				fprintf(stderr, "%s ", argv[i]);

			fprintf(stderr, "\n%s (%s-%s-%s)\n",
				version_string,
				HOST_CPU, HOST_VENDOR, HOST_OS);
		}
	}
	/* Find name of root directory. */
	node = findequal(arg);
	if (!use_graft_ptrs)
		node = NULL;
	if (node == NULL) {
		node = arg;
	} else {
		/*
		 * Remove '\\' escape chars which are located
		 * before '\\' and '=' chars
		 */
		node = escstrcpy(nodename, ++node);
	}

	/*
	 * See if boot catalog file exists in root directory, if not we will
	 * create it.
	 */
	if (use_eltorito)
		init_boot_catalog(node);

	/*
	 * Find the device and inode number of the root directory. Record this
	 * in the hash table so we don't scan it more than once.
	 */
	stat_filter(node, &statbuf);
	add_directory_hash(statbuf.st_dev, STAT_INODE(statbuf));

	memset(&de, 0, sizeof(de));

	de.filedir = root;	/* We need this to bootstrap */

	if (cdrecord_data != NULL && merge_image == NULL) {
		/*
		 * in case we want to add a new session, but don't want to
		 * merge old one
		 */
		get_session_start(NULL);
	}
	if (merge_image != NULL) {
		mrootp = merge_isofs(merge_image);
		if (mrootp == NULL) {
			/* Complain and die. */
#ifdef	USE_LIBSCHILY
			comerr("Unable to find previous session image %s\n",
				merge_image);
#else
			fprintf(stderr,
				"Unable to find previous session image %s\n",
				merge_image);
			exit(1);
#endif
		}
		memcpy(de.isorec.extent, mrootp->extent, 8);
	}
	/*
	 * Create an empty root directory. If we ever scan it for real,
	 * we will fill in the contents.
	 */
	find_or_create_directory(NULL, "", &de, TRUE);

#ifdef APPLE_HYB
	/* may need to set window layout of the volume */
	if (root_info)
		set_root_info(root_info);
#endif /* APPLE_HYB */

	/*
	 * Scan the actual directory (and any we find below it) for files to
	 * write out to the output image.  Note - we take multiple source
	 * directories and keep merging them onto the image.
	 */
	while ((arg = get_pnames(argc, argv, optind, pname,
						sizeof(pname), pfp)) != NULL) {
		struct directory *graft_dir;
		struct stat	st;
		char		*short_name;
		int		status;
		char		graft_point[1024];

		/*
		 * We would like a syntax like:
		 *
		 * 	/tmp=/usr/tmp/xxx
		 *
		 * where the user can specify a place to graft each component
		 * of the tree.  To do this, we may have to create directories
		 * along the way, of course. Secondly, I would like to allow
		 * the user to do something like:
		 *
		 *	/home/baz/RMAIL=/u3/users/baz/RMAIL
		 *
		 * so that normal files could also be injected into the tree
		 * at an arbitrary point.
		 *
		 * The idea is that the last component of whatever is being
		 * entered would take the name from the last component of
		 * whatever the user specifies.
		 *
		 * The default will be that the file is injected at the root of
		 * the image tree.
		 */
		node = findequal(arg);
		if (!use_graft_ptrs)
			node = NULL;
		/*
		 * Remove '\\' escape chars which are located
		 * before '\\' and '=' chars ---> below in escstrcpy()
		 */

		short_name = NULL;

		if (node != NULL) {
			char		*pnt;
			char		*xpnt;

			*node = '\0';
			escstrcpy(graft_point, arg);
			*node = '=';

			node = escstrcpy(nodename, ++node);

			graft_dir = root;
			xpnt = graft_point;
			if (*xpnt == PATH_SEPARATOR) {
				xpnt++;
			}
			/*
			 * Loop down deeper and deeper until we find the
			 * correct insertion spot.
			 */
			while (1 == 1) {
				pnt = strchr(xpnt, PATH_SEPARATOR);
				if (pnt == NULL) {
					if (*xpnt != '\0') {
						short_name = xpnt;
					}
					break;
				}
				*pnt = '\0';
				graft_dir = find_or_create_directory(graft_dir,
					graft_point,
					NULL, TRUE);
				*pnt = PATH_SEPARATOR;
				xpnt = pnt + 1;
			}
		} else {
			graft_dir = root;
			node = arg;
		}

		/*
		 * Now see whether the user wants to add a regular file, or a
		 * directory at this point.
		 */
		status = stat_filter(node, &st);
		if (status != 0) {
			/*
			 * This is a fatal error - the user won't be getting
			 * what they want if we were to proceed.
			 */
#ifdef	USE_LIBSCHILY
			comerr("Invalid node - %s\n", node);
#else
			fprintf(stderr, "Invalid node - %s\n", node);
			exit(1);
#endif
		} else {
			if (S_ISDIR(st.st_mode)) {
				if (!scan_directory_tree(graft_dir,
								node, &de)) {
					exit(1);
				}
			} else {
				if (short_name == NULL) {
					short_name = strrchr(node,
							PATH_SEPARATOR);
					if (short_name == NULL ||
							short_name < node) {
						short_name = node;
					} else {
						short_name++;
					}
				}
#ifdef APPLE_HYB
				if (!insert_file_entry(graft_dir, node,
								short_name, 0))
#else
				if (!insert_file_entry(graft_dir, node,
								short_name))
#endif	/* APPLE_HYB */
				{
					exit(1);
				}
			}
		}

		optind++;
		no_path_names = 0;
	}

	if (pfp && pfp != stdin)
		fclose(pfp);

	/*
	 * exit if we don't have any pathnames to process
	 * - not going to happen at the moment as we have to have at least one
	 * path on the command line
	 */
	if (no_path_names) {
#ifdef	USE_LIBSCHILY
		errmsgno(EX_BAD, "No pathnames found.\n");
#endif
		usage(1);
	}
	/*
	 * Now merge in any previous sessions.  This is driven on the source
	 * side, since we may need to create some additional directories.
	 */
	if (merge_image != NULL) {
		if (merge_previous_session(root, mrootp) < 0) {
#ifdef	USE_LIBSCHILY
			comerrno(EX_BAD, "Cannot merge previous session.\n");
#else
			fprintf(stderr, "Cannot merge previous session.\n");
			exit(1);
#endif
		}
		close_merge_image();

		/*
		 * set up parent_dir and filedir in relocated entries which
		 * were read from previous session so that
		 * finish_cl_pl_entries can do its job
		 */
		match_cl_re_entries();
	}
#ifdef APPLE_HYB
	/* free up any HFS filename mapping memory */
	if (apple_both)
		clean_hfs();
#endif	/* APPLE_HYB */

	/* hide "./rr_moved" if all its contents have been hidden */
	if (reloc_dir && i_ishidden())
		hide_reloc_dir();

	/* insert the boot catalog if required */
	if (use_eltorito)
		insert_boot_cat();

	/*
	 * Free up any matching memory
	 */
	for (n=0;n<MAX_MAT;n++)
		gen_del_match(n);

#ifdef SORTING
	del_sort();
#endif /* SORTING */

	/*
	 * Sort the directories in the required order (by ISO9660).  Also,
	 * choose the names for the 8.3 filesystem if required, and do any
	 * other post-scan work.
	 */
	goof += sort_tree(root);

	if (goof) {
#ifdef	USE_LIBSCHILY
		comerrno(EX_BAD, "ISO9660/Rock Ridge tree sort failed.\n");
#else
		fprintf(stderr, "ISO9660/Rock Ridge tree sort failed.\n");
		exit(1);
#endif
	}
	if (use_Joliet) {
		goof += joliet_sort_tree(root);
	}
	if (goof) {
#ifdef	USE_LIBSCHILY
		comerrno(EX_BAD, "Joliet tree sort failed.\n");
#else
		fprintf(stderr, "Joliet tree sort failed.\n");
		exit(1);
#endif
	}
	/*
	 * Fix a couple of things in the root directory so that everything is
	 * self consistent.
	 */
	root->self = root->contents;	/* Fix this up so that the path tables
					   get done right */

	/* OK, ready to write the file.  Open it up, and generate the thing. */
	if (print_size) {
		discimage = fopen("/dev/null", "wb");
		if (!discimage) {
#ifdef	USE_LIBSCHILY
			comerr("Unable to open /dev/null\n");
#else
			fprintf(stderr, "Unable to open /dev/null\n");
			exit(1);
#endif
		}
	} else if (outfile) {
		discimage = fopen(outfile, "wb");
		if (!discimage) {
#ifdef	USE_LIBSCHILY
			comerr("Unable to open disc image file\n");
#else
			fprintf(stderr, "Unable to open disc image file\n");
			exit(1);
#endif
		};
	} else {
		discimage = stdout;

#if	defined(__CYGWIN32__) || defined(__CYGWIN__) || defined(__EMX__)
		setmode(fileno(stdout), O_BINARY);
#endif
	}

	/* Now assign addresses on the disc for the path table. */

	path_blocks = (path_table_size + (SECTOR_SIZE - 1)) >> 11;
	if (path_blocks & 1)
		path_blocks++;

	jpath_blocks = (jpath_table_size + (SECTOR_SIZE - 1)) >> 11;
	if (jpath_blocks & 1)
		jpath_blocks++;

	/*
	 * Start to set up the linked list that we use to track the contents
	 * of the disc.
	 */
#ifdef APPLE_HYB
#ifdef PREP_BOOT
	if (apple_hyb || use_prep_boot)
#else	/* PREP_BOOT */
	if (apple_hyb)
#endif	/* PREP_BOOT */
		outputlist_insert(&hfs_desc);
#endif	/* APPLE_HYB */
	if (use_sparcboot)
		outputlist_insert(&sunlabel_desc);
	if (use_genboot)
		outputlist_insert(&genboot_desc);
	outputlist_insert(&padblock_desc);

	/* PVD for disc. */
	outputlist_insert(&voldesc_desc);

	/* SVD for El Torito. MUST be immediately after the PVD! */
	if (use_eltorito) {
		outputlist_insert(&torito_desc);
	}
	/* SVD for Joliet. */
	if (use_Joliet) {
		outputlist_insert(&joliet_desc);
	}
	/* Finally the last volume desctiptor. */
	outputlist_insert(&end_vol);

	/* Insert the version desctiptor. */
	outputlist_insert(&version_desc);

	/* Now start with path tables and directory tree info. */
	outputlist_insert(&pathtable_desc);
	if (use_Joliet) {
		outputlist_insert(&jpathtable_desc);
	}
	outputlist_insert(&dirtree_desc);
	if (use_Joliet) {
		outputlist_insert(&jdirtree_desc);
	}
	outputlist_insert(&dirtree_clean);

	if (extension_record) {
		outputlist_insert(&extension_desc);
	}
	outputlist_insert(&files_desc);

	/*
	 * Allow room for the various headers we will be writing.
	 * There will always be a primary and an end volume descriptor.
	 */
	last_extent = session_start;

	/*
	 * Calculate the size of all of the components of