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Full Discussion: text manipulation
Top Forums UNIX for Dummies Questions & Answers text manipulation Post 302208564 by rajkishore on Tuesday 24th of June 2008 08:22:41 AM
Old 06-24-2008
CPU & Memory Expected output

Expected output:

In a text file:

Parent1
child1
child2

parent2
child21
child22
child23

parent3

child31
child32
....

***************************************

In the file 'a' and 'b' are the identifiers for the parent and children.

Thanks to you.

I thought of doing something like:

step 1: Grep for parents and then after I get the list of parents {may be in an array}

step 2: I can grep for children with a condition which checks if I hit the first parent from the previously obtained list. When I hit the first parent then save the child list to a text file with the parent name on it.

step 3: Again proceed for the next ones by keeping every thing in a for loop and update the text file every time.


If this algorithm sounds good then the point I am stuck with is step 2.

can you help me out there/ or with any other alternative way.
 

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explain_select_or_die(3)				     Library Functions Manual					  explain_select_or_die(3)

NAME
explain_select_or_die - blah blah and report errors SYNOPSIS
#include <libexplain/select.h> void explain_select_or_die(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout); DESCRIPTION
The explain_select_or_die function is used to call the select(2) system call. On failure an explanation will be printed to stderr, obtained from explain_select(3), and then the process terminates by calling exit(EXIT_FAILURE). This function is intended to be used in a fashion similar to the following example: explain_select_or_die(nfds, readfds, writefds, exceptfds, timeout); nfds The nfds, exactly as to be passed to the select(2) system call. readfds The readfds, exactly as to be passed to the select(2) system call. writefds The writefds, exactly as to be passed to the select(2) system call. exceptfds The exceptfds, exactly as to be passed to the select(2) system call. timeout The timeout, exactly as to be passed to the select(2) system call. Returns: This function only returns on success. On failure, prints an explanation and exits. SEE ALSO
select(2) blah blah explain_select(3) explain select(2) errors exit(2) terminate the calling process COPYRIGHT
libexplain version 0.52 Copyright (C) 2008 Peter Miller explain_select_or_die(3)
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