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cddevsuppl(8) System Manager's Manual cddevsuppl(8) NAME cddevsuppl - Sets and gets the major and minor numbers of a device file on a Rock Ridge format CD-ROM SYNOPSIS /usr/sbin/cddevsuppl -m mapfile [-c] /usr/sbin/cddevsuppl -u unmapfile [-c] /usr/sbin/cddevsuppl [-c] FLAGS Directs cddevsuppl to continue processing the device file mappings if an error is returned for a specific device file mapping. An error mes- sage for that specific device file will be printed to standard error. The default action is to stop processing when an error has occurred. This option is useful only when used in combination with the -m mapfile or -u unmapfile options. Maps the major and minor numbers for device files. The mappings are specified in mapfile. This text file has one entry for each device file mapping in the format: device_file_path new_major new_minor The device_file_path field is the full pathname of the file on the CD-ROM, and the new_major and new_minor fields are integers. The fields are separated by white space. The entries are sepa- rated by newlines. Anything beyond the third field is ignored. The following is an example of mapfile: /mnt/dev/ttys4 8 2050 /mnt/dev/zero 38 0 The maximum number of mappings for a Rock Ridge compact disk is defined in the header file <sys/cdrom.h>. If a device file is mapped again, the previous device file mapping for the device file is overridden. Unmaps the major and minor numbers for de- vice files. The mappings are specified in unmapfile. This text file has one entry for each device file mapping in the format: device_file_path The device_file_path field is the full pathname of the file on the CD-ROM. The entries are separated by newlines. Anything be- yond the first field is ignored. The following is an example of mapfile: /mnt/dev/zero DESCRIPTION The cddevsuppl command is used to map and unmap the major and minor numbers of a device file on a mounted Rock Ridge format CD-ROM. The -m mapfile option maps the major and minor number of device files and dis- plays the new setting, if the mapping is successful. This option is used to add new mappings or to change existing mappings, in case the major and minor numbers of the device files are incorrect. The -u unmapfile option removes the existing mappings for files speci- fied in unmapfile and displays the device file and the major/minor num- bers as recorded on the CD-ROM. If no options are used, the cddevsuppl command displays the existing device file mappings. If the mapping table is empty, nothing is dis- played. Note: The mapping table is cleared after a mount or umount command. If you want to open a device file on a CD-ROM, the dev option must be specified in the mount command. See mount(8) for more information. RESTRICTIONS Only the superuser can change administrative CD-ROM features success- fully. To read the current device file mappings, the user must have read permission on the device file. Mappings should be established before affected device files are used. If the command is applied for device file mappings when device files have already been opened, the effect of this command on these files is undefined. Only existing devices files on the CD-ROM can be mapped. These files are indicated by the mode: b (block special file) or c (character spe- cial file). Use the ls -l command to display the file modes.. If you access device files on a CD-ROM that are mapped to inappropriate major and minor numbers, undefined results can occur. The device file mappings for a mounted CD-ROM are eliminated when the CD-ROM is unmounted. EXAMPLES The following example shows the output of the cddevsuppl command when no CD-ROM is mounted and no files are mapped: # cddevsuppl # The following example shows the output of the cddevsuppl command after a CD-ROM file system has been mounted: # /usr/sbin/mount -t cdfs -o noversion,rrip,dev /dev/rz4c /mnt # cddev- suppl # The following example maps the major and minor numbers of files mounted in the previous example and specified in mapfile. Note: If you want, you can issue an ls -l command before and after the cddevsuppl command to verify that the major and minor numbers have changed. # cddevsuppl -m /tmp/mapfile /mnt/dev/ttys4: (8,2050) /mnt/dev/zero: (38,0) The following example unmaps the major and minor numbers of the file specified in unmapfile file and shows the result of the subsequent cd- devsuppl command: # cddevsuppl -u /tmp/unmapfile /mnt/dev/zero: (1,5) # cddevsuppl /mnt/dev/ttys4: (8,2050) The following example unmounts the /mnt file system and shows the out- put of the subsequent cddevsuppl command: # umount /mnt # cddevsuppl # EXIT VALUES The following exit values are returned: Successful completion. File not found, file is not a file or directory within a CD-ROM file hierar- chy, or access denied. Not user with appropriate privileges. Too many mappings. Parameter error or bad format in a mapping file. File is not a device file. File not previously mapped. RELATED INFORMATION Commands: mount(8) Files: cdfs(4) Functions: cd_setdevmap(3), cd_getdevmap(3) delim off cddevsuppl(8)