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$ laClq@?q\bѿ ?? /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ /* * -- * General header file for linux CD-ROM drivers * Copyright (C) 1992 David Giller, rafetmad@oxy.edu * 1994, 1995 Eberhard Mönkeberg, emoenke@gwdg.de * 1996 David van Leeuwen, david@tm.tno.nl * 1997, 1998 Erik Andersen, andersee@debian.org * 1998-2002 Jens Axboe, axboe@suse.de */ #ifndef _UAPI_LINUX_CDROM_H #define _UAPI_LINUX_CDROM_H #include #include /******************************************************* * As of Linux 2.1.x, all Linux CD-ROM application programs will use this * (and only this) include file. It is my hope to provide Linux with * a uniform interface between software accessing CD-ROMs and the various * device drivers that actually talk to the drives. There may still be * 23 different kinds of strange CD-ROM drives, but at least there will * now be one, and only one, Linux CD-ROM interface. * * Additionally, as of Linux 2.1.x, all Linux application programs * should use the O_NONBLOCK option when opening a CD-ROM device * for subsequent ioctl commands. This allows for neat system errors * like "No medium found" or "Wrong medium type" upon attempting to * mount or play an empty slot, mount an audio disc, or play a data disc. * Generally, changing an application program to support O_NONBLOCK * is as easy as the following: * - drive = open("/dev/cdrom", O_RDONLY); * + drive = open("/dev/cdrom", O_RDONLY | O_NONBLOCK); * It is worth the small change. * * Patches for many common CD programs (provided by David A. van Leeuwen) * can be found at: ftp://ftp.gwdg.de/pub/linux/cdrom/drivers/cm206/ * *******************************************************/ /* When a driver supports a certain function, but the cdrom drive we are * using doesn't, we will return the error EDRIVE_CANT_DO_THIS. We will * borrow the "Operation not supported" error from the network folks to * accomplish this. Maybe someday we will get a more targeted error code, * but this will do for now... */ #define EDRIVE_CANT_DO_THIS EOPNOTSUPP /******************************************************* * The CD-ROM IOCTL commands -- these should be supported by * all the various cdrom drivers. For the CD-ROM ioctls, we * will commandeer byte 0x53, or 'S'. *******************************************************/ #define CDROMPAUSE 0x5301 /* Pause Audio Operation */ #define CDROMRESUME 0x5302 /* Resume paused Audio Operation */ #define CDROMPLAYMSF 0x5303 /* Play Audio MSF (struct cdrom_msf) */ #define CDROMPLAYTRKIND 0x5304 /* Play Audio Track/index (struct cdrom_ti) */ #define CDROMREADTOCHDR 0x5305 /* Read TOC header (struct cdrom_tochdr) */ #define CDROMREADTOCENTRY 0x5306 /* Read TOC entry (struct cdrom_tocentry) */ #define CDROMSTOP 0x5307 /* Stop the cdrom drive */ #define CDROMSTART 0x5308 /* Start the cdrom drive */ #define CDROMEJECT 0x5309 /* Ejects the cdrom media */ #define CDROMVOLCTRL 0x530a /* Control output volume (struct cdrom_volctrl) */ #define CDROMSUBCHNL 0x530b /* Read subchannel data (struct cdrom_subchnl) */ #define CDROMREADMODE2 0x530c /* Read CDROM mode 2 data (2336 Bytes)