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-rw-r--r--genisoimage/stream.c272
1 files changed, 272 insertions, 0 deletions
diff --git a/genisoimage/stream.c b/genisoimage/stream.c
new file mode 100644
index 0000000..f59c1e3
--- /dev/null
+++ b/genisoimage/stream.c
@@ -0,0 +1,272 @@
+/*
+ * This file has been modified for the cdrkit suite.
+ *
+ * The behaviour and appearence of the program code below can differ to a major
+ * extent from the version distributed by the original author(s).
+ *
+ * For details, see Changelog file distributed with the cdrkit package. If you
+ * received this file from another source then ask the distributing person for
+ * a log of modifications.
+ *
+ */
+
+/* @(#)stream.c 1.3 04/03/04 Copyright 2002-2003 J. Schilling */
+/* Parts from @(#)stream.c 1.9 07/02/17 Copyright 2002-2007 J. Schilling */
+/*
+ * ISO-9660 stream (pipe) file module for genisoimage
+ *
+ * Copyright (c) 2002-2003 J. Schilling
+ * Implemented after an idea from M.H. Voase
+ */
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; see the file COPYING. If not, write to the Free Software
+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <mconfig.h>
+#include "genisoimage.h"
+#include "iso9660.h"
+
+static int size_str_file(int starting_extent);
+static int size_str_dir(int starting_extent);
+static int size_str_path(int starting_extent);
+
+static int gen_str_path(void);
+
+static int write_str_file(FILE *outfile);
+static int write_str_dir(FILE *outfile);
+static int write_str_path(FILE *outfile);
+
+extern struct directory *root;
+extern unsigned int session_start;
+extern int stream_media_size;
+extern char *stream_filename;
+extern time_t begun;
+extern int volume_sequence_number;
+
+static unsigned int avail_extent;
+static unsigned int stream_extent;
+static unsigned int stream_size;
+static unsigned int stream_pad;
+static char *l_path;
+static char *m_path;
+static struct iso_directory_record s_dir;
+static int stream_finished = 0;
+
+/*
+ * Compute the size of the file
+ */
+static int
+size_str_file(int starting_extent)
+{
+ int n;
+extern int dopad;
+
+ stream_extent = last_extent; /* Start of stream file content */
+
+ avail_extent = stream_media_size;
+ n = last_extent; /* Room for FS blocks before file */
+ n += 1; /* Room for the directory block */
+ stream_pad = 0;
+ if (n < 50) {
+ stream_pad = 50 - n;
+ n = 50; /* Make net. size easy to compute */
+ }
+ if (dopad)
+ n += 150; /* Room for final padding */
+ avail_extent -= n;
+
+ last_extent += avail_extent + stream_pad;
+
+ return (0);
+}
+
+/*
+ * The size of the directory record - one sector
+ */
+static int
+size_str_dir(int starting_extent)
+{
+ root->extent = last_extent;
+ last_extent += 1;
+ return (0);
+}
+
+/*
+ * The size of the path tables - two sectors
+ */
+static int
+size_str_path(int starting_extent)
+{
+ path_table[0] = starting_extent;
+ path_table[1] = 0;
+ path_table[2] = path_table[0] + 1;
+ path_table[3] = 0;
+ last_extent += 2 * 1;
+ return (0);
+}
+
+/*
+ * Generate the path table data
+ */
+static int
+gen_str_path()
+{
+ /*
+ * Basically add the root directory entry
+ */
+ l_path = (char *)e_malloc(SECTOR_SIZE);
+ m_path = (char *)e_malloc(SECTOR_SIZE);
+ memset(l_path, 0, SECTOR_SIZE);
+ memset(m_path, 0, SECTOR_SIZE);
+ l_path[0] = 1;
+ m_path[0] = 1;
+ set_731(l_path + 2, root->extent);
+ set_732(m_path + 2, root->extent);
+ set_721(l_path + 6, 1);
+ set_722(m_path + 6, 1);
+ l_path[8] = '\0'; l_path[9] = '\0';
+ m_path[8] = '\0'; m_path[9] = '\0';
+ return (0);
+}
+
+/*
+ * Write the file content
+ */
+static int
+write_str_file(FILE *outfile)
+{
+ unsigned int idx = 0;
+ unsigned int iso_blocks;
+ int count;
+ char *buf;
+
+ buf = e_malloc(SECTOR_SIZE);
+ stream_size = 0;
+ while ((idx + SECTOR_SIZE) < (avail_extent * SECTOR_SIZE)) {
+ memset(buf, 0, SECTOR_SIZE);
+ count = fread(buf, 1, SECTOR_SIZE, stdin);
+ if (count <= 0) {
+ stream_finished = 1;
+ break;
+ }
+ idx += count;
+ jtwrite(buf, count, 1, 0, FALSE);
+ xfwrite(buf, count, 1, outfile, 0, FALSE);
+ }
+
+ stream_size = idx;
+ iso_blocks = ISO_BLOCKS(idx);
+ memset(buf, 0, SECTOR_SIZE);
+ if (SECTOR_SIZE * iso_blocks - idx)
+ {
+ jtwrite(buf, SECTOR_SIZE * iso_blocks - idx, 1, 0, FALSE);
+ xfwrite(buf, SECTOR_SIZE * iso_blocks - idx, 1, outfile, 0, FALSE);
+ }
+ /*
+ * If we didn't fill the available area, pad to directory block
+ */
+ for (count = 0; count < (avail_extent - iso_blocks); count++)
+ {
+ jtwrite(buf, SECTOR_SIZE, 1, 0, FALSE);
+ xfwrite(buf, SECTOR_SIZE, 1, outfile, 0, FALSE);
+ }
+ for (count = 0; count < stream_pad; count++)
+ {
+ jtwrite(buf, SECTOR_SIZE, 1, 0, FALSE);
+ xfwrite(buf, SECTOR_SIZE, 1, outfile, 0, FALSE);
+ }
+
+ last_extent_written += avail_extent + stream_pad;
+ return (0);
+}
+
+/*
+ * Generate and write the directory record data
+ */
+static int
+write_str_dir(FILE *outfile)
+{
+ int to_write;
+ char *buf;
+
+ buf = e_malloc(SECTOR_SIZE); memset(buf, 0, SECTOR_SIZE);
+ memset(&s_dir, 0, sizeof (struct iso_directory_record));
+ s_dir.length[0] = 34; /* BAD: Hardcoded - Will fix, MHV */
+ s_dir.ext_attr_length[0] = 0;
+ set_733((char *)s_dir.extent, root->extent);
+ set_733((char *)s_dir.size, SECTOR_SIZE);
+ iso9660_date(s_dir.date, begun);
+ s_dir.flags[0] = ISO_DIRECTORY;
+ s_dir.file_unit_size[0] = 0;
+ s_dir.interleave[0] = 0;
+ set_723((char *)s_dir.volume_sequence_number, volume_sequence_number);
+ s_dir.name_len[0] = 1;
+ s_dir.name[0] = 0; /* "." */
+ jtwrite(&s_dir, offsetof(struct iso_directory_record, name[0]) + 1, 1, 0, FALSE);
+ xfwrite(&s_dir, offsetof(struct iso_directory_record, name[0]) + 1, 1, outfile, 0, FALSE);
+ s_dir.name[0] = 1; /* ".." */
+ jtwrite(&s_dir, offsetof(struct iso_directory_record, name[0]) + 1, 1, 0, FALSE);
+ xfwrite(&s_dir, offsetof(struct iso_directory_record, name[0]) + 1, 1, outfile, 0, FALSE);
+ memset(&s_dir, 0, sizeof (struct iso_directory_record));
+ s_dir.length[0] = 34 + strlen(stream_filename);
+ s_dir.ext_attr_length[0] = 0;
+ set_733((char *) s_dir.extent, stream_extent);
+ set_733((char *) s_dir.size, stream_size);
+ iso9660_date(s_dir.date, begun);
+ s_dir.flags[0] = 0;
+ s_dir.file_unit_size[0] = 0;
+ set_723((char *)s_dir.volume_sequence_number, volume_sequence_number);
+ s_dir.name_len[0] = strlen(stream_filename);
+ memcpy(s_dir.name, stream_filename, s_dir.name_len[0]);
+ jtwrite(&s_dir, offsetof(struct iso_directory_record, name[0])
+ + s_dir.name_len[0], 1, 0, FALSE);
+ xfwrite(&s_dir, offsetof(struct iso_directory_record, name[0])
+ + s_dir.name_len[0], 1, outfile, 0, FALSE);
+
+ /*
+ * This calc is: 2 single char directory entries (34) + an additional entry
+ * with filename length stream_filename + round up for even lenght count
+ */
+ to_write = (s_dir.name_len[0] % 2) ? 0 : 1;
+ jtwrite(buf, SECTOR_SIZE - ((3 * 34) + s_dir.name_len[0]) +
+ to_write, 1, 0, FALSE);
+ xfwrite(buf, SECTOR_SIZE - ((3 * 34) + s_dir.name_len[0]) +
+ to_write, 1, outfile, 0, FALSE);
+ free(buf);
+ last_extent_written++;
+ return (0);
+}
+
+/*
+ * Generate the path table data
+ */
+static int
+write_str_path(FILE *outfile)
+{
+ jtwrite(l_path, SECTOR_SIZE, 1, 0, FALSE);
+ xfwrite(l_path, SECTOR_SIZE, 1, outfile, 0, FALSE);
+ last_extent_written++;
+ jtwrite(m_path, SECTOR_SIZE, 1, 0, FALSE);
+ xfwrite(m_path, SECTOR_SIZE, 1, outfile, 0, FALSE);
+ last_extent_written++;
+ free(l_path);
+ free(m_path);
+ path_table_l = NULL;
+ path_table_m = NULL;
+ return (0);
+}
+
+struct output_fragment strfile_desc = { NULL, size_str_file, NULL, write_str_file, "Stream File" };
+struct output_fragment strdir_desc = { NULL, size_str_dir, NULL, write_str_dir, "Stream File Directory" };
+struct output_fragment strpath_desc = { NULL, size_str_path, gen_str_path, write_str_path, "Stream File Path table" };
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-21 14:23:32 +0000