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Shell Programming and Scripting
Help with perl script while reading a file
Post 302424623 by ramakanth_burra on Wednesday 26th of May 2010 01:09:35 AM
05-26-2010
Re:Thank you
Hi Pseudocoder, thanks a ton, for your help in resolving my problem. Your solution is the exact one that I was searching for. I could not have asked better than that.
In case of recend (record end), its just a word used in the header file, to notify that it is the end of the record. Sorry for not mentioning this in my previous post.
Once again, thanks very much.
Regards,
RB
In case of recend (record end), its just a word used in the header file, to notify that it is the end of the record. Sorry for not mentioning this in my previous post.
Once again, thanks very much.
Regards,
RB
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LEARN ABOUT V7
tm
TM(4) Kernel Interfaces Manual TM(4) NAME
tm - TM-11/TU-10 magtape interface DESCRIPTION
The files mt0, ..., mt7 refer to the DEC TU10/TM11 magtape. When closed it can be rewound or not, see below. If it was open for writing, two end-of-files are written. If the tape is not to be rewound it is positioned with the head between the two tapemarks. If the 0200 bit is on in the minor device number the tape is not rewound when closed. A standard tape consists of a series of 512 byte records terminated by an end-of-file. To the extent possible, the system makes it possi- ble, if inefficient, to treat the tape like any other file. Seeks have their usual meaning and it is possible to read or write a byte at a time. Writing in very small units is inadvisable, however, because it tends to create monstrous record gaps. The mt files discussed above are useful when it is desired to access the tape in a way compatible with ordinary files. When foreign tapes are to be dealt with, and especially when long records are to be read or written, the `raw' interface is appropriate. The associated files are named rmt0, ..., rmt7. Each read or write call reads or writes the next record on the tape. In the write case the record has the same length as the buffer given. During a read, the record size is passed back as the number of bytes read, provided it is no greater than the buffer size; if the record is long, an error is indicated. In raw tape I/O, the buffer must begin on a word boundary and the count must be even. Seeks are ignored. A zero byte count is returned when a tape mark is read, but another read will fetch the first record of the new tape file. FILES
/dev/mt?, /dev/rmt? SEE ALSO
tp(1) BUGS
If any non-data error is encountered, it refuses to do anything more until closed. In raw I/O, there should be a way to perform forward and backward record and file spacing and to write an EOF mark. TM(4)