X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=extras%2Fcdrom_id%2Fcdrom_id.c;h=e7a3e40a85e22f8a2cbb3f61a649cb842df26332;hp=9c4f6f31b40277c80153e02ba8eb36577b572050;hb=678df8a461c7573bf423a39be383bc7b70d943df;hpb=1ef6c9e9f0f405d1fed403c13c57a233a484bed7

diff --git a/extras/cdrom_id/cdrom_id.c b/extras/cdrom_id/cdrom_id.c
index 9c4f6f31b..e7a3e40a8 100644
--- a/extras/cdrom_id/cdrom_id.c
+++ b/extras/cdrom_id/cdrom_id.c
@@ -85,6 +85,8 @@ static unsigned int cd_media_cd_rw = 0;
 static unsigned int cd_media_dvd_rom = 0;
 static unsigned int cd_media_dvd_r = 0;
 static unsigned int cd_media_dvd_rw = 0;
+static unsigned int cd_media_dvd_rw_ro = 0; /* restricted overwrite mode */
+static unsigned int cd_media_dvd_rw_seq = 0; /* sequential mode */
 static unsigned int cd_media_dvd_ram = 0;
 static unsigned int cd_media_dvd_plus_r = 0;
 static unsigned int cd_media_dvd_plus_rw = 0;
@@ -348,6 +350,45 @@ static int feature_profiles(struct udev *udev, const unsigned char *profiles, si
 	return 0;
 }
 
+static int cd_profiles_old_mmc(struct udev *udev, int fd)
+{
+	struct scsi_cmd sc;
+	int err;
+
+	unsigned char header[32];
+
+	scsi_cmd_init(udev, &sc, header, sizeof(header));
+	scsi_cmd_set(udev, &sc, 0, 0x51);
+	scsi_cmd_set(udev, &sc, 8, sizeof(header));
+	scsi_cmd_set(udev, &sc, 9, 0);
+	err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header));
+	if ((err != 0)) {
+		info_scsi_cmd_err(udev, "READ DISC INFORMATION", err);
+		if (cd_media == 1) {
+			info(udev, "no current profile, but disc is present; assuming CD-ROM\n");
+			cd_media_cd_rom = 1;
+			return 0;
+		} else {
+			info(udev, "no current profile, assuming no media\n");
+			return -1;
+		}
+	};
+
+	cd_media = 1;
+
+	if (header[2] & 16) {
+		cd_media_cd_rw = 1;
+		info(udev, "profile 0x0a media_cd_rw\n");
+	} else if ((header[2] & 3) < 2 && cd_cd_r) {
+		cd_media_cd_r = 1;
+		info(udev, "profile 0x09 media_cd_r\n");
+	} else {
+		cd_media_cd_rom = 1;
+		info(udev, "profile 0x08 media_cd_rom\n");
+	}
+	return 0;
+}
+
 static int cd_profiles(struct udev *udev, int fd)
 {
 	struct scsi_cmd sc;
@@ -365,6 +406,12 @@ static int cd_profiles(struct udev *udev, int fd)
 	err = scsi_cmd_run(udev, &sc, fd, features, sizeof(features));
 	if ((err != 0)) {
 		info_scsi_cmd_err(udev, "GET CONFIGURATION", err);
+		/* handle pre-MMC2 drives which do not support GET CONFIGURATION */
+		if (SK(err) == 0x5 && ASC(err) == 0x20) {
+			info(udev, "drive is pre-MMC2 and does not support 46h get configuration command\n");
+			info(udev, "trying to work around the problem\n");
+			return cd_profiles_old_mmc(udev, fd);
+		}
 		return -1;
 	}
 
@@ -440,10 +487,16 @@ static int cd_profiles(struct udev *udev, int fd)
 		cd_media_dvd_ram = 1;
 		break;
 	case 0x13:
+		info(udev, "profile 0x%02x media_dvd_rw_ro\n", cur_profile);
+		cd_media = 1;
+		cd_media_dvd_rw = 1;
+		cd_media_dvd_rw_ro = 1;
+		break;
 	case 0x14:
-		info(udev, "profile 0x%02x media_dvd_rw\n", cur_profile);
+		info(udev, "profile 0x%02x media_dvd_rw_seq\n", cur_profile);
 		cd_media = 1;
 		cd_media_dvd_rw = 1;
+		cd_media_dvd_rw_seq = 1;
 		break;
 	case 0x1B:
 		info(udev, "profile 0x%02x media_dvd_plus_r\n", cur_profile);
@@ -527,16 +580,23 @@ static int cd_media_info(struct udev *udev, int fd)
 
 	cd_media = 1;
 	info(udev, "disk type %02x\n", header[8]);
+	info(udev, "hardware reported media status: %s\n", media_status[header[2] & 3]);
 
 	/* exclude plain CDROM, some fake cdroms return 0 for "blank" media here */
 	if (!cd_media_cd_rom)
 		cd_media_state = media_status[header[2] & 3];
 
-	/* DVD+RW discs once formatted are always "complete", DVD-RAM are
-	 * "other" or "complete" if the disc is write protected; we need to
-	 * check the contents if it is blank */
-	if ((cd_media_dvd_plus_rw || cd_media_dvd_plus_rw_dl || cd_media_dvd_ram) && (header[2] & 3) > 1) {
-		unsigned char buffer[17 * 2048];
+	/* fresh DVD-RW in restricted overwite mode reports itself as
+	 * "appendable"; change it to "blank" to make it consistent with what
+	 * gets reported after blanking, and what userspace expects  */
+	if (cd_media_dvd_rw_ro && (header[2] & 3) == 1)
+		cd_media_state = media_status[0];
+
+	/* DVD+RW discs (and DVD-RW in restricted mode) once formatted are
+	 * always "complete", DVD-RAM are "other" or "complete" if the disc is
+	 * write protected; we need to check the contents if it is blank */
+	if ((cd_media_dvd_rw_ro || cd_media_dvd_plus_rw || cd_media_dvd_plus_rw_dl || cd_media_dvd_ram) && (header[2] & 3) > 1) {
+		unsigned char buffer[32 * 2048];
 		unsigned char result, len;
 		int block, offset;
 
@@ -607,7 +667,7 @@ static int cd_media_info(struct udev *udev, int fd)
 		scsi_cmd_init(udev, &sc, buffer, sizeof(buffer));
 		scsi_cmd_set(udev, &sc, 0, 0x28);
 		scsi_cmd_set(udev, &sc, 5, 0);
-		scsi_cmd_set(udev, &sc, 8, 17);
+		scsi_cmd_set(udev, &sc, 8, 32);
 		scsi_cmd_set(udev, &sc, 9, 0);
 		err = scsi_cmd_run(udev, &sc, fd, buffer, sizeof(buffer));
 		if ((err != 0)) {
@@ -637,7 +697,9 @@ static int cd_media_info(struct udev *udev, int fd)
 	}
 
 determined:
-	if ((header[2] & 3) != 2)
+	/* "other" is e. g. DVD-RAM, can't append sessions there; DVDs in
+	 * restricted overwrite mode can never append, only in sequential mode */
+	if ((header[2] & 3) < 2 && !cd_media_dvd_rw_ro)
 		cd_media_session_next = header[10] << 8 | header[5];
 	cd_media_session_count = header[9] << 8 | header[4];
 	cd_media_track_count = header[11] << 8 | header[6];
@@ -815,13 +877,11 @@ int main(int argc, char *argv[])
 	if (cd_profiles(udev, fd) < 0)
 		goto print;
 
-	/* get writable media state */
-	if (cd_media_info(udev, fd) < 0)
-		goto print;
-
 	/* get session/track info */
-	if (cd_media_toc(udev, fd) < 0)
-		goto print;
+	cd_media_toc(udev, fd);
+
+	/* get writable media state */
+	cd_media_info(udev, fd);
 
 print:
 	printf("ID_CDROM=1\n");