From 5df00bc2318222f0c4109d3f729a6ae4300a910b Mon Sep 17 00:00:00 2001
From: Thomas Schmitt <scdbackup@gmx.net>
Date: Mon, 24 Sep 2007 18:14:07 +0000
Subject: [PATCH] Made stdio-drives work on readonly CD block devices

---
 libburn/trunk/cdrskin/cdrskin_timestamp.h | 2 +-
 libburn/trunk/libburn/drive.c             | 5 +++--
 libburn/trunk/libburn/sg-linux.c          | 4 +---
 3 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/libburn/trunk/cdrskin/cdrskin_timestamp.h b/libburn/trunk/cdrskin/cdrskin_timestamp.h
index 99415df4..3243f99a 100644
--- a/libburn/trunk/cdrskin/cdrskin_timestamp.h
+++ b/libburn/trunk/cdrskin/cdrskin_timestamp.h
@@ -1 +1 @@
-#define Cdrskin_timestamP "2007.09.24.135845"
+#define Cdrskin_timestamP "2007.09.24.181340"
diff --git a/libburn/trunk/libburn/drive.c b/libburn/trunk/libburn/drive.c
index ecaad47c..dfe83ee0 100644
--- a/libburn/trunk/libburn/drive.c
+++ b/libburn/trunk/libburn/drive.c
@@ -1140,7 +1140,8 @@ int burn_drive__fd_from_special_adr(char *adr)
 int burn_drive_grab_dummy(struct burn_drive_info *drive_infos[], char *fname)
 {
 	int ret = -1, fd = -1, role = 0;
-	off_t size = ((off_t) (1024 * 1024 * 1024) * (off_t) 2048);
+	/* divided by 512 it needs to fit into a signed long integer */
+	off_t size = ((off_t) (512 * 1024 * 1024 - 1) * (off_t) 2048);
 	struct burn_drive *d= NULL, *regd_d;
 	struct stat stbuf;
 
@@ -1815,7 +1816,7 @@ off_t burn_disc_available_space(struct burn_drive *d,
 	if (d->drive_role != 1) {
 		if (d->media_capacity_remaining <= 0)
 			d->media_capacity_remaining = 
-				((off_t) (1024 * 1024 * 1024) * (off_t) 2048);
+			((off_t) (512 * 1024 * 1024 - 1) * (off_t) 2048);
 	} else {
 		if (o != NULL)
 			d->send_write_parameters(d, o);
diff --git a/libburn/trunk/libburn/sg-linux.c b/libburn/trunk/libburn/sg-linux.c
index b0a2c728..679dbcca 100644
--- a/libburn/trunk/libburn/sg-linux.c
+++ b/libburn/trunk/libburn/sg-linux.c
@@ -1379,7 +1379,7 @@ int burn_os_stdio_capacity(char *path, off_t *bytes)
 	struct statvfs vfsbuf;
 	char testpath[4096], *cpt;
 	long blocks;
-	int open_mode = O_RDWR, fd, ret;
+	int open_mode = O_RDONLY, fd, ret;
 	off_t add_size = 0;
 
 	testpath[0] = 0;
@@ -1396,8 +1396,6 @@ int burn_os_stdio_capacity(char *path, off_t *bytes)
 		if (stat(testpath, &stbuf) == -1)
 			return -1;
 	} else if(S_ISBLK(stbuf.st_mode)) {
-		if(burn_sg_open_o_excl)
-			open_mode |= O_EXCL;
 		fd = open(path, open_mode);
 		if (fd == -1)
 			return -2;