12-03-2007
Help needed in removing intermediate segments from a pipe delimited segment file
Hi,
I just stuckup in doing some regular expressions on a file.
I have data which has multiple FHS and BTS segments like:
FHS|12121|LOCAL|2323
MSH|10101|POTAMAS|2323
PID|121221|THOMAS|DAVID|23432
OBX|2342|H1211|3232
BTS|0000|MERSTO|LIABLE
FHS|12121|LOCAL|2323
MSH|10101|POTAMAS|2323
PID|121221|THOMAS|DAVID|23432
OBX|2342|H1211|3232
BTS|0000|MERSTO|LIABLE
FHS|12121|LOCAL|2323
MSH|10101|POTAMAS|2323
PID|121221|THOMAS|DAVID|23432
OBX|2342|H1211|3232
BTS|0000|MERSTO|LIABLE
I am trying to have an output which will have only one FHS at the beginning and one BTS in the ending.
And all other FHS and BTS in the middle should be deleted.
The output should look like :
FHS|12121|LOCAL|2323
MSH|10101|POTAMAS|2323
PID|121221|THOMAS|DAVID|23432
OBX|2342|H1211|3232
MSH|10101|POTAMAS|2323
PID|121221|THOMAS|DAVID|23432
OBX|2342|H1211|3232
MSH|10101|POTAMAS|2323
PID|121221|THOMAS|DAVID|23432
OBX|2342|H1211|3232
BTS|0000|MERSTO|LIABLE
I will be glad if you give me some light in solving this problem.
Thanks in advance.
Naren
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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)