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Full Discussion: Check for rows with particular string
Top Forums Shell Programming and Scripting Check for rows with particular string Post 302838079 by daytripper1021 on Monday 29th of July 2013 12:07:05 AM
Old 07-29-2013
Check for rows with particular string
Hi. The data file is as below:

2000922111111100232091212098324....
2123011230912832094820943684896....
3435983453409583405938453049583....
.
.
.

I need to get only the rows that match my criteria. For example: those at characters 5-10 should equal to "922111" (thus getting only the 1st row above).

As my script processes a lot of these files, I only need to check for this string first before I run succeeding codes to minimize run time. An "if-cut" condition should work but I don't want to do this per line (again, due to run time considerations).

Hope you can help me with an alternative solution.

Thanks!!!
 

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LEARN ABOUT DEBIAN

netsnmp_row_merge

row_merge(3snmp)						     net-snmp							  row_merge(3snmp)

NAME

       row_merge -

       Calls sub handlers with request for one row at a time.

   Defines
       #define ROW_MERGE_WAITING   0
       #define ROW_MERGE_ACTIVE   1
       #define ROW_MERGE_DONE	2
       #define ROW_MERGE_HEAD	3

   Functions
       netsnmp_mib_handler * netsnmp_get_row_merge_handler (int prefix_len)
	   returns a row_merge handler that can be injected into a given handler chain.
       int netsnmp_register_row_merge (netsnmp_handler_registration *reginfo)
	   functionally the same as calling netsnmp_register_handler() but also injects a row_merge handler at the same time for you.
       netsnmp_row_merge_status * netsnmp_row_merge_status_get (netsnmp_handler_registration *reginfo, netsnmp_agent_request_info *reqinfo, int
	   create_missing)
	   retrieve row_merge_status
       int netsnmp_row_merge_status_first (netsnmp_handler_registration *reginfo, netsnmp_agent_request_info *reqinfo)
	   Determine if this is the first row.
       int netsnmp_row_merge_status_last (netsnmp_handler_registration *reginfo, netsnmp_agent_request_info *reqinfo)
	   Determine if this is the last row.
       int netsnmp_row_merge_helper_handler (netsnmp_mib_handler *handler, netsnmp_handler_registration *reginfo, netsnmp_agent_request_info
	   *reqinfo, netsnmp_request_info *requests)
	   Implements the row_merge handler.
       void netsnmp_init_row_merge (void)
	   initializes the row_merge helper which then registers a row_merge handler as a run-time injectable handler for configuration file use.

Detailed Description
       Calls sub handlers with request for one row at a time.

       This helper splits a whole bunch of requests into chunks based on the row index that they refer to, and passes all requests for a given row
       to the lower handlers. This is useful for handlers that don't want to process multiple rows at the same time, but are happy to iterate
       through the request list for a single row.

Function Documentation
   netsnmp_mib_handler* netsnmp_get_row_merge_handler (int prefix_len)
       returns a row_merge handler that can be injected into a given handler chain.

       Definition at line 28 of file row_merge.c.

   void netsnmp_init_row_merge (void)
       initializes the row_merge helper which then registers a row_merge handler as a run-time injectable handler for configuration file use.

       Definition at line 360 of file row_merge.c.

   int netsnmp_register_row_merge (netsnmp_handler_registration * reginfo)
       functionally the same as calling netsnmp_register_handler() but also injects a row_merge handler at the same time for you.

       Definition at line 42 of file row_merge.c.

   int netsnmp_row_merge_helper_handler (netsnmp_mib_handler * handler, netsnmp_handler_registration * reginfo, netsnmp_agent_request_info *
       reqinfo, netsnmp_request_info * requests)
       Implements the row_merge handler.

       Definition at line 154 of file row_merge.c.

   int netsnmp_row_merge_status_first (netsnmp_handler_registration * reginfo, netsnmp_agent_request_info * reqinfo)
       Determine if this is the first row. returns 1 if this is the first row for this pass of the handler.

       Definition at line 110 of file row_merge.c.

   netsnmp_row_merge_status* netsnmp_row_merge_status_get (netsnmp_handler_registration * reginfo, netsnmp_agent_request_info * reqinfo, int
       create_missing)
       retrieve row_merge_status

       Definition at line 67 of file row_merge.c.

   int netsnmp_row_merge_status_last (netsnmp_handler_registration * reginfo, netsnmp_agent_request_info * reqinfo)
       Determine if this is the last row. returns 1 if this is the last row for this pass of the handler.

       Definition at line 130 of file row_merge.c.

Author
       Generated automatically by Doxygen for net-snmp from the source code.

Version 5.4.3.pre1						    23 May 2010 						  row_merge(3snmp)
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