FANG is a general purpose file utility package. One of the many operations it performs is tape dumping. This manual is intended for the user who wishes to use FANG to dump a tape. The user is assumed to have had some experience using other tape dump packages. For complete descriptions of the commands mentioned in this manual, refer to the "FANG User Guide", which is the definitive reference on FANG. FANG is invoked with the control statement:
@fang
Following the control statement are a series of commands. commands are free format and have the general format:
<command>,<options> <parameters>
as on a control statement, if no options are present, the comma after the command name is omitted.
DUMP dumps a specified number of blocks from a file. options control mode and dump editing format. The command has the form:
DUMP,<options> <filename>,<count>
which will dump <count> blocks of file <filename> and leave the file positioned at the end of the blocks dumped. The dump will stop if an end-of-file is encountered or a tape error occurs. The assumed dump format is Fieldata alphanumeric. Options are:
A Edit dump as ASCII characters.
I Edit dump as decimal integers.
K Edit dump in octal, Fieldata, and
ASCII side-by-side.
M Interpret <count> as a count of files,
not blocks.
N List block lengths only, don't dump.
O Edit dump in octal.
T Omit spaces between words.
If <count> is omitted, infinity is assumed unless the 'M' option is on, in which case one is assumed. The following runstream will dump in alphanumeric all blocks of tape 1672 up to an end-of-file mark.
@RUN runid,account,project @ASG,T DTAP,T,1672 @FANG DUMP DTAP @FIN
The following dumps the first three files:
@fang dump,m dtap,3
The following dumps the first block in octal:
@fang dump,o dtap,1
LIST is identical to DUMP, except that a block count of one is always assumed if the <count> parameter is omitted. To dump one block of file dtap in alphanumeric, the command:
LIST dtap
will suffice.
POSITION moves a tape over a specified number of blocks or files. The format of the command is:
POSITION,<options> <filename>,<count>
If no options are supplied, the tape is moved <count> blocks forward. The 'B' option moves the tape <count> blocks backward. the 'M' option causes the tape to be moved <count> files forward or backward if the 'B' option is absent or present respectively. if the tape is being moved backward by files, the tape will be moved backward until the specified number of file marks are encountered and then moved forward over the last file mark. This leaves the tape at the beginning of that file. If <count> is omitted, 1 is assumed.
To dump block 14 of a tape:
@fang position dtap,13 list dtap
to dump block 20 in both alphabetic and octal:
@fang position dtap,19 list dtap position,b dtap,1 list,o dtap
to dump the last block in file 3 of a tape:
@fang position,m dtap,3 position,b dtap,2 list dtap
REWIND may be used to rewind files:
REWIND,<options> <file1>,<file2>,...
rewinds file1, file2, etc. The 'I' option rewinds with interlock. To rewind files a, b, and tapx:
@fang rewind a,b,tapx