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Top Forums Shell Programming and Scripting awk issue splitting a fixed-width file containing line feed in data Post 302991831 by pchang on Thursday 16th of February 2017 04:07:00 PM
Old 02-16-2017
Hi RudiC.

If you look at position 33, there are 3 different types of segments (UK, UX, CU).

That's why we cannot process the source file as is since each segment can have different data lengths.

We need to split the source file by segment types first and then process each sub file separately.

I hope I answered your question.

Thanks.

Last edited by pchang; 02-16-2017 at 05:08 PM.. Reason: more detail info
 

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plock(2)							System Calls Manual							  plock(2)

NAME
plock - Locks a process' text and/or data segments in memory SYNOPSIS
#include <sys/lock.h> int plock( int opr) ; PARAMETERS
Specifies one of the following operations: Locks the text and data segments into memory. Locks the text segment into memory. Locks the data segment into memory. Removes locks. DESCRIPTION
The plock() function locks or unlocks a process' text segments, data segments, or both in physical memory. When locked, the physical pages containing the text or data segment will not be paged out. It is an error to lock a segment that is already locked. The caller must have superuser privilege to use the plock() function. Note that memory acquired subsequent to a plock() function may or may not be locked in memory, depending on the specific acquisition method. Memory acquired using the brk() function (or the sbrk() function) is locked if the data segment was locked. Memory acquired via the mmap() or vm_allocate() functions will not be locked. RETURN VALUES
Upon successful completion, a value of 0 (zero) is returned to the calling process. Otherwise, a value of -1 is returned and errno is set to indicate the error. ERRORS
If the plock() function fails, errno may be set to one of the following values: The caller does not have appropriate privilege. There are insufficient resources to perform the operation. The opr parameter is PROCLOCK, but the text segment or the data segment is already locked. The opr parameter is TXTLOCK, but the text segment is already locked. The opr parameter is DATLOCK, but the data segment is already locked. The opr parameter is UNLOCK, but neither the text segment nor the data segment is locked. RELATED INFORMATION
Functions: brk(2), mmap(2) delim off plock(2)
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