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btcreate(8) System Manager's Manual btcreate(8) NAME btcreate - Builds a bootable Standalone System (SAS) kernel on tape SYNOPSIS /usr/sys/bin/btcreate [-a addlist_file] [-f] [-k config_file] [-m mfs | disk_partition] [-s fslist_file] [-t tape_device] FLAGS The btcreate utility builds a bootable Standalone System (SAS) kernel on UFS and AdvFS file systems only. It supports non-interactive and interactive modes. To run this utility in non-interactive mode, spec- ify at least the -f, -k, -m, -s, and -t flags on the command line. To run this utility in interactive mode, invoke the utility without any flags or a subset of the above flags; you are then prompted for all or any missing information. Causes the btcreate utility to back up the files and directories speci- fied in the addlist_file to the miniroot file system. The miniroot file system is the minimum file system required to build the SAS ker- nel. If you are using the btcreate utility in non-interactive mode, you must create this file before invoking the utility. The ad- dlist_file name should be absolute pathname, such as /usr/lib/sabt/etc/addlist The addlist_file consists of one line for each entry. Each en- try has two fields separated by a space or tab. The first field specifies the absolute pathname of the file or directory on the currently running system. If the file is not found, the btcreate utility exits. The second field specifies the absolute pathname of the file or directory on the miniroot file system. A sample addlist_file follows: /sbin/kill /sbin /usr/lo- cal/bin/mydir /usr/local/bin/mydir /.kshrc /.kshrc /sbin/sort /sbin/sort If the total size of all files and directories ex- ceeds the size limit of 360KB on the miniroot file system, the btcreate utility exits. Forces the newfs utility to create the miniroot file system without verifying whether or not a file system exists on the partition. This flag also forces btcreate to be completely non-interactive, whether you select mfs or disk partition for the -m option. Causes the btcreate utility to use the specified kernel configuration file located in the /usr/sys/conf directory. The kernel configuration file defines the run-time behavior of the kernel and is used to build the SAS kernel. Causes the btcreate utility to create the miniroot file system on a memory file system (mfs) using the mfs utility or on the specified disk partition (for example, rz0h) using the newfs utility. The miniroot file system is the minimum file system required to build the SAS kernel. A memory file system (mfs) is a UFS file system which resides in virtual memory. By creating the miniroot file system in virtual memory, you can save disk space. The mfs utility uses 30720 (15MB) of memory using swap space as the special device. The btcreate command mounts the memory file system on /var/tmp/mf- smnt$$. If you use the mfs flag, the btcreate utility creates another memory file system that is 17.45MB which is mounted on the /var/tmp/procprod directory. If you have sufficient disk space, use the -m flag with the disk_partition variable to create the miniroot file system on disk. Causes the btcreate utility to back up the file systems specified in fslist_file to tape. If you are using the btcreate utility in non-interactive mode, you must create this file be- fore invoking the utility. The fslist_file should be an ab- solute pathname, such as: /usr/lib/sabt/etc/fslist The fslist_file consists of one line for each file system you want to back up. Each line contains three fields separated by a space as follows: devname mountpoint type In the previous example: Specifies the name of the disk device where the file system resides. For example, /dev/rz0a and root_domain#root, are valid device names for UFS and AdvFS re- spectively. Specifies where the file system is mounted. For example, the mount point may be root (/). Specifies the type of file system. Valid entries are ufs for the UNIX File System or advfs for the Advanced File System. Causes the btcreate utility to use the tape device specified (for example, nrmt0h). DESCRIPTION Use the btcreate utility to build a bootable Standalone System (SAS) kernel on tape. The SAS kernel has a built-in memory file system (mfs), which contains the minimum commands, files, and directories needed to restore the system image. This is referred to as the miniroot file system. The btcreate utility supports UFS and AdvFS file systems only. You must have superuser privileges to use this utility. After creating the SAS kernel, you can install the customized operating system using the btextract utility. See the btextract reference page for more in- formation. Note To execute, the btcreate utility requires 156000 blocks (512 bytes per block) of disk space in the /usr direc- tory. To prepare for a btcreate session, have the following information available: Name of the configuration file in the /usr/sys/conf direc- tory. Name of the disk partition (for example, rz2e) where the mini- root file system is to reside. Minimum size needed on the disk is 30720 blocks (512 bytes per block). This disk partition should not be mounted when btcreate is executed. Note The btcreate utility invokes the newfs utility to create the partition. If you do not specify the -f flag, the newfs utility asks you to confirm overwriting the partition. If you specify the -f flag, the newfs utility overwrites this partition without prompting you for confirmation. Name of the tape device, for example nrmt0h, where the SAS kernel and file systems are to re- side. Device name, mount point, and type of each file system (UFS or AdvFS) that you want to back up to the tape device. The following shows valid UFS and AdvFS entries: UFS: /dev/rz1a / ufs /dev/rz1g /usr ufs AdvFS: root_domain#root / advfs usr_domain#usr /usr advfs If you do not specify the -s flag, the btcreate utility displays a list of file systems to help you with your selection. If you specify the -s flag, you must create the file before starting the btcreate utility. See the -s flag for more information. Note Do not select swap partitions for file system backups. An addlist_file, if you specify the -a flag, which includes files or directories on the miniroot file system. See the -a flag for more information. An fslist_file, if you specify the -s flag, which specifies the file systems to back up. See the -s flag for more information. A /usr/lib/sabt/sbin/custom_in- stall.sh script, if you want to customize the restored system image. Both interactive and non-interactive users must create this file before invoking the btcreate utility. The file must be written in the Bourne shell language (sh1) as it is the only shell provided on the miniroot file system. The btcreate utility copies the custom_install.sh file on to tape and places it in the sbin directory on the miniroot file system. The btextract utility invokes the custom_install.sh script before exiting. To create the SAS kernel, the btcreate utility copies the /usr/sys/conf/YOUR_SYSTEM_NAME configuration file to /usr/sys/conf/YOUR_SYSTEM_NAME.BOOTABLE and modifies it as follows: config vmunix root on md pseudo-device memd 30720 These modifications indicate that a memory file system of 30720 is being con- figured. The memory file system and the disk partition where the mini- root file system reside are equivalent in size. After modifying the configuration file, the btcreate utility executes the doconfig command and moves the bootable kernel, /usr/sys/YOUR_SYS- TEM_NAME.BOOTABLE/vmunix to the /usr/sys/bin directory. RETURN VALUES The btcreate utility returns zero (0) on success and a number greater than zero (0) on error. EXAMPLES The following examples demonstrate several methods of invoking the bt- create utility. In the following example, the btcreate utility is in- voked without any flags placing you in interactive mode. The btcreate utility prompts you for all information needed to build the SAS kernel. # /usr/sys/bin/btcreate In the following example, all flags are speci- fied causing the btcreate utility to build the SAS kernel in non-inter- active mode. That is, the SAS kernel is built without prompting you for information. # /usr/sys/bin/btcreate -a /usr/lib/sabt/etc/ad- dlist_file -f \ -k YOUR_SYSTEM_NAME -m mfs -t nrmt0h \ -s /usr/lib/sabt/etc/fslist_file In the following example, the -a flag is excluded from the command line. The btcreate utility assumes you are not adding files or directories. The SAS kernel is built without prompting you for information as you specified the minimum flags re- quired to run in non-interactive mode. # /usr/sys/bin/btcreate -f -k GOOFY -m mfs -t nrmt0h \ -s /usr/local/bin/backup_file In the following example, the -k flag is excluded from the command line. The btcreate utility places you in interactive mode and prompts you for any options that you did not specify. # /usr/sys/bin/btcreate -a /usr/sys/bin/user_file -f \ -m rz0h -t nrmt0h -s /usr/lo- cal/bin/backup_file FILES Provides a log of the btcreate process Specifies the customized shell script used to perform system administrative tasks on the restored sys- tem image RELATED INFORMATION Utilities: df(8), btextract(8), disklabel(8), doconfig(8), dump(8), newfs(8), mkfdmn(8), mkfset(8), pmerge(8), vdump(8) delim off btcreate(8)