Append (cat) to beginning of file ?


 
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Old 12-09-2003
Question Append (cat) to beginning of file ?

Hi,

Fairly new to unix scripting, hoping to get some help.

using AIX v5

Basically I have 3 files 1). Header record 2). many detail record 3). Trailer record

My desired result is 1 file which contains Heaeder, Detail, Trailer


Currenty I am using a series of:
cat detail >> header
rm detail
cat trailer >> header
rm trailer
mv header detail

Now the problem with this approach is that my detail file quite often is in excess of 5gb, so the time is takes to do the cat seems like a waste of time to me. I would really like to be able to concatenate the header to the beginning of the detail and only "move" the one record.

Any ideas would be appreciated.

Thanks,
 
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PX_PUT_RECORD(3)					     Library Functions Manual						  PX_PUT_RECORD(3)

NAME
PX_put_record -- Stores record in Paradox file SYNOPSIS
#include <paradox.h> int PX_put_record(pxdoc_t *pxdoc, char *data) DESCRIPTION
Stores a record in the buffer data into a Paradox file. data must be constructed with PX_put_data_xxx(3) functions before. It is of the same structure as the record returned by PX_get_record(3) and PX_get_record2(3). The new record will be stored after the last one added. RETURN VALUE
Returns the record position on success and -1 on failure. The first position has number 0. SEE ALSO
PX_get_record(3), PX_get_record2(3), PX_put_recordn(3), PX_put_data_byte(3), PX_put_data_short(3), PX_put_data_long(3), PX_put_data_dou- ble(3), PX_put_data_alpha(3) AUTHOR
This manual page was written by Uwe Steinmann uwe@steinmann.cx. PX_PUT_RECORD(3)