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Top Forums Shell Programming and Scripting Read 2 lines from File, Run Command based off output Post 302673221 by UCCCC on Tuesday 17th of July 2012 04:39:20 PM
Old 07-17-2012
Read 2 lines from File, Run Command based off output

Okay, so I have a file containing line after line of three digit numbers. I need a script that does an action based on the last two numbers in this list.

So.... To get the last two numbers, I can have the script do

tail -2 filename.txt

But where I run into trouble is as follows. If these last two numbers, retrieved via tail, are Greater than 400, I want to run a command. The command is irrelevant, so lets just make something up: touch filename.txt

If it helps, it doesnt necessarily have to do > 400. It would still meet my needs if it did something more like. If = 400 or 401 or 402 or 403 or 404 or 405 as there will really only be that number set, with nothing over 405.

So the script can function with whatever is easier.

Thanks a ton! Smilie
 

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ns_return(3aolserver)					    AOLserver Built-In Commands 				     ns_return(3aolserver)

__________________________________________________________________________________________________________________________________________________

NAME
ns_connsendfp, ns_respond, ns_return, ns_returnadminnotice, ns_returnbadrequest, ns_returnerror, ns_returnfile, ns_returnforbidden, ns_returnfp, ns_returnnotfound, ns_returnnotice, ns_returnredirect, ns_returnunauthorized, ns_write - commands SYNOPSIS
ns_connsendfp fp len ns_respond ns_return status type string ns_returnadminnotice status msg ?longmsg? ns_returnbadrequest reason ns_returnerror status msg ns_returnfile status type filename ns_returnforbidden ns_returnfp status type fileid len ns_returnnotfound ns_returnnotice status msg ?longmsg? ns_returnredirect location ns_returnunauthorized ns_write string _________________________________________________________________ DESCRIPTION
These procedures provide a simple interface for returning information to the client. They build HTTP/1.0 headers and send the appropriate data out the socket to the client. The script does not end at the time ns_return* is invoked so you can continue processing data after the client has gotten the data and closed the socket. type should be a MIME type (see ns_guesstype manual page for a list). status is a three-digit number fitting the pattern below: 1xx Infor- mational - Not used, but reserved for future use. 2xx Success - The action was successfully received, understood, and accepted. 3xx Redi- rection - Further action must be taken in order to complete the request. 4xx Client Error - The request contains bad syntax or cannot be fulfilled. 5xx Server Error - The server failed to fulfill an apparently valid request. Some common status values and their meanings are: 201 Created 202 Accepted 203 Provisional Information 204 No Content 300 Multiple Choices 301 Moved Permanently 302 Moved Temporarily 303 Method 304 Not Modified 401 Unauthorized 402 Payment Required 403 Forbidden 404 Not Found 405 Method Not Allowed 406 None Acceptable 407 Proxy Authentication Required 408 Request Time-out 409 Conflict 410 Gone 501 Not Implemented 502 Bad Gateway 503 Service Unavailable 504 Gateway Time-out ns_connsendfp This function writes len bytes of the specified channel or file to the conn. ns_return Sends back both the headers and the string. ns_returnadminnotice Wraps the text msg and longmsg in some html, appends a line with a link to "mailto:serveradministrator" based on the virtual server parameter "WebMaster". ns_returnbadrequest Returns a 400 status code and a formatted HTML message containing the reason text. ns_returnerror Wraps the text msg in some html and returns that to the client. ns_returnfile Sends back the headers and the contents of the file. ns_returnforbidden Returns a 403 status code. ns_returnfp First sends the appropriate headers. Next, it writes out the contents of file from the current file position until the end of the file. ns_returnnotfound Returns a 404 status code. ns_returnnotice Wraps teh text msg and longmsg in some html and returns that to the client. ns_returnredirect Returns a redirect to the passed in location ns_returnunauthorized Returns a 401 status code ns_write Writes the string out the connection. You can use it instead of the ns_return or ns_respond functions to build HTTP responses. AOLserver will not include the usual headers on the output data. The script does not end at the time ns_write* is invoked so you can continue processing data after the client has gotten the data and closed the socket. SEE ALSO
ns_respond(n), ns_writefp(n) KEYWORDS
AOLserver 4.0 ns_return(3aolserver)
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