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ltf(1) General Commands Manual ltf(1) NAME ltf - labeled tape facility SYNOPSIS ltf flag [ keys ] file ... DESCRIPTION The ltf command reads and writes single-volume Versions 3 and 4 ANSI- compatible tape volumes. The file argument specifies each file or di- rectory name that is to be processed. If a directory name is speci- fied, the complete directory tree is processed. FLAGS The actions of ltf are controlled by one of the following option char- acters that must appear as the first command-line argument: -c, -H, -t, -x, and -i. Creates a new volume assigning an interchange file name to the files on the volume, that is, ltf initializes the volume and writes each named file onto the output file. Then ltf assigns an interchange file name to the files being created on the volume. This interchange file name is a name that can be recognized by a system other than this operating system. (Not all file names allowed in this operating system are permissible in all forms of ANSI volumes.) This file name is 17 characters in length and includes only capital letters and the "a" characters, which are listed in ltf(4). It is formed by converting all lowercase letters to uppercase, converting non-"a" char- acters to uppercase Z, and truncating the resultant string to 17 char- acters. If ANSI Version 4 volumes are being used, the original file name is preserved in HDR3 through HDR9 and EOF3 through EOF9. For fur- ther information, see ltf(4). Displays help messages for all flags and keys. Lists each named file on the specified volume. If no file argu- ment is given, information about all files on the volume is provided. If -t is used without v or V (verbose keys), the interchange file names are also included in the list. Extracts each named file from the vol- ume to the user's current directory. If no file argument is given, the entire content of the volume is extracted. If the p key is not speci- fied when extracting files from a volume written by a DIGITAL UNIX sys- tem, the files are restored to the current user and group IDs and to the mode set by the umask(2) system call. Initializes an ANSI labeled magnetic volume in accordance with the ANSI X3.27-1978 Standard for Magnetic Tape Labels and File Structure for Information Interchange. KEYS The following optional keys can be specified to enable or disable ltf actions as specified: Outputs an ANSI-compatible Version 3 format vol- ume. This key can be used with the -c flag only. The default version is 4. For further information, see ltf(4). Writes to a tape volume the file that a symbolic link points to instead of creating the sym- bolic link on a volume. The file written to the tape now has the same name as the symbolic link. This key can be used with the -c flag only. When extracting, if a symbolic link exists in the current directory that has the same name as a file on the tape volume, the link is fol- lowed and the file that the symbolic link currently points to is over- written with the extracted file. To avoid overwriting files, use the w key. Omits directory blocks from the output volume. When creating a volume, the directory files are omitted, and when listing or extract- ing, the V key is disabled. Omits usage of optional headers HDR3 through HDR9 and EOF3 through EOF9. For further information, see ltf(4). If a file is created on a DIGITAL UNIX system without the use of the O key, these file headers contain the complete DIGITAL UNIX disk file name. Not all non-Digital UNIX systems are able to process vol- umes containing these header labels. Thus, it is helpful to use this qualifier to avoid unnecessary error messages when planning to use other systems. Restores files to original mode, user ID and group ID that is written on the tape volume. This key can be used with the -x flag on DIGITAL UNIX files and by the superuser only. Displays long form information about volume and files. Normally, ltf operates with little terminal output. When used in conjunction with the -t flag, v gives more information about the volume entries than when used in conjunction with the -c and -x flags. The following line is typical output from -tv functions. ltf: Volume ID is: ULTRIX Volume is: ANSI Version #4 ltf: Owner ID is: OwnerID ltf: Implementation ID is: SystemID ltf: Volume created on: System t(1,1) rw-r--r-- 103/3 owner Feb 2 12:34 2530 bytes <cc >D file1 t(2,1) rw-r--r-- 103/3 owner Jun 29 09:34 999 bytes <com>D file2 t(3,1) rwxr- wxrwx 293/10 name Jan 24 10:20 1234 bytes <bin>F name t(4,1) --xrwx--- 199/04 theowner Jan 24 10:21 12345 bytes <asc>D long file name The first field contains the file sequence number and the file section number of the file. If a DIGITAL UNIX system created the labeled volume, the second and third fields contain the mode, and owner/group ID of the file. Otherwise, these two fields are filled with dashes. The fourth field contains the file owner name. The fifth field contains latest modification time. The year is included if the modification time is older than Jan 1 of the current year. The sixth field contains the number of bytes used on the volume for the file. If the volume is from a system other than DIGITAL UNIX, this field contains the number of blocks with the block size in parentheses. The seventh field contains the ANSI file type (angle brackets) and the file record format (one character suffix). The file record formats are: F (fixed length), D (variable length), or S (spanned/segmented records). The eighth (last) field contains the name of the file. If the file name does not fit within the 12 spaces left in the line, the name appears on the next line preceded by a carriage return. A long file name will be contin- ued over one or more lines thus it is recommended to keep auto wrap on in the terminal setup. Also if a file on a volume is either a symbolic or hard link, information about the linked file is displayed on the next line, preceded by a carriage re- turn. Displays verbose information about directories. Warns the user if file name is in danger of being truncated when using -c or if it could be overwritten using -x. Normally, ltf oper- ates silently and does not let the user know what is happening. When -cw is specified, ltf displays two warning messages if the interchange name and the DIGITAL UNIX file name are not the same. When -xw is specified, ltf displays a warning message if a file is about to be overwritten. Another message is displayed asking for approval to overwrite the file. If the user types no or presses Return, the option exists to enter a new file name or press Return to quit. If a new file name is entered, this name is also checked. Thus, ltf does not continue until a unique file name is entered. When -x is specified, ltf does not warn the user if a directory name already exists. Selects a unit number for a named tape device. These unit numbers can be en- tered when using the default tape name, /dev/rmt0h. The following optional keys require an additional argument to be speci- fied on the command line. If two or more of these keys are used, their respective arguments are to appear in the exact order that the keys are specified. Sets the blocking factor to size. This specifies the maxi- mum number of bytes that can be written in a block on a volume. If no value is specified, size defaults to 2048 bytes. The maximum size is 20480 bytes and the minimum size is 18 bytes. The B key need only be specified with -c. The size value may be specified as n bytes, (where n is assumed to be decimal) or as nb, (a multiple of 512 bytes using n followed by b, where b signifies the multiple of 512) or as nk, (a multiple of 1024 bytes using n followed by k, where k signifies the multiple of 1024). Sets the device file name to device. The default is /dev/rmt0h. The use of the f key overrides the 0 ... 31 keys. Allows file name to be supplied either interactively or from a specified file. Normally, ltf expects the argument file names to be part of the command line. The I key allows the user to enter argument file names either interactively or from a specified file. If file is a dash (-), ltf reads standard input and prompts for all required information. All of the file names are requested first, followed by a single return before the arguments are processed. If file is a valid file name, the specified file is opened and read to obtain argument file names. Specifies a six-charac- ter volume identifier. The default label for DIGITAL UNIX systems is "ULTRIX". Specifies file sequence and section number at which volume will be positioned, using #,#. The first #, represents the file se- quence number, while second #, the file section number. The file se- quence number begins at 1 and is incremented for each file in the cur- rent file set. Since this implementation of ltf only produces one file set, the file sequence number for volumes written with this implementa- tion is the number of the file as it is written on the volume. The file section number begins at 1 and is incremented for each file sec- tion on any one volume. This number is necessary when files are writ- ten in multi-volume format where the need may exist to split a file across volumes; however since this implementation of ltf writes only single volumes, the file section number is always 1 for volumes written with this implementation. If no file arguments are specified, all files from the position number to the end of the tape are listed or extracted. Otherwise, particular files that exist between the position number and the end of the tape can be listed or extracted. A warning message appears if a file is re- quested that exists before the position number specified. The P key cannot be used with the -c flag. RESTRICTIONS The ltf command does not support floppy diskettes or multi-volume tapes. EXAMPLES ltf -cfB /dev/rmt0h 100 file1 file2 file3 This example creates a new volume for file1, file2, and file3 using de- vice /dev/rmt0h (f key) and a blocking factor of 100 (B key). ERRORS Diagnostics are written to the standard error file. They come in four forms: fatal errors, warnings, information, and prompts. The ltf com- mand terminates when it detects that a fatal error has occurred. The diagnostics are intended to be self-explanatory. Their general format is: ltf: FATAL > a fatal error message ltf: Warning > a warning or advisory message ltf: Info > an information message ltf: a prompt asking for in- put RELATED INFORMATION ltf(4) delim off ltf(1)