On Apr 1, 5:23 am, "Mickey Ferguson" <[EMAIL PROTECTED]> wrote: > I'm generating output from a grep command, which I then want to process in > grep again, filtering out my unwanted text. In this specific example, I > want to filter out all lines that start with zero or more white space, > followed by the comment characters "//". Here is what I thought I would > use: > > grep StopProductServices *.rul *.h | grep ^\s*[^/] > > The first grep obviously finds all occurrences of StopProductServices within > all *.rul and *.h files. Then that output is piped into grep, with the > intent being to start at the beginning of the line (the caret), allow any > amount of white space (zero or more), and then match only if the first > non-white space charater is NOT a forward slash. What it appears to be > doing is to match the exact opposite of what I want. > > To break it down a little, I first produced the output from the first grep, > which is used for the pipe: > > ->grep StopProductServices *.rul *.h > NTService.rul:// FUNCTION: StopProductServices(sProduct) > NTService.rul:// 03/24/08 MSF - Make StopProductServices() take an > additional parameter to > NTService.rul:function StopProductServices(sProduct) > NTService.rul:// 03/24/08 MSF - Make StopProductServices() take an > additional parameter to > NTService.rul:// Function: SafeStopProductServices > NTService.rul:// 03/24/08 MSF - Make StopProductServices(), > SafeStopProductServices() and > NTService.rul:function SafeStopProductServices(sProduct) > NTService.rul: bServicesStopped = StopProductServices(sProduct); > NTService.rul:// 03/24/08 MSF - Make StopProductServices(), > SafeStopProductServices() and > Setup.rul:// - Use Start... and StopProductServices() to stop > VESTA and > Setup.rul:// 03/31/08 MSF - Use Start... and StopProductServices() to stop > VESTA and > Setup.rul:// 03/31/08 MSF - Use Start... and StopProductServices() to stop > VESTA and > Setup.rul: StopProductServices(@PRODUCT_NAME); > Setup.rul: StopProductServices(VESTA_VIEW); > NTService.h:// 09/07/07 MSF - New functions StopProductServices(), > NTService.h:// SafeStopProductServices() and > DisableProductServices(). > NTService.h:// 03/24/08 MSF - Make StopProductServices(), > SafeStopProductServices() and > NTService.h:prototype StopProductServices(STRING); > NTService.h:prototype SafeStopProductServices(STRING); > > Then I ran the full command, and you can see that the output is not at all > what I expected: > > [11:06:39]: *** C:\WIP\VESTA\Installer\Script Files *** > ->grep StopProductServices *.rul *.h | grep ^\s*[^/] > NTService.rul:// FUNCTION: StopProductServices(sProduct) > NTService.rul:// 03/24/08 MSF - Make StopProductServices() take an > additional parameter to > NTService.rul:// 03/24/08 MSF - Make StopProductServices() take an > additional parameter to > NTService.rul:// Function: SafeStopProductServices > NTService.rul:// 03/24/08 MSF - Make StopProductServices(), > SafeStopProductServices() and > NTService.rul:// 03/24/08 MSF - Make StopProductServices(), > SafeStopProductServices() and > Setup.rul:// - Use Start... and StopProductServices() to stop > VESTA and > Setup.rul:// 03/31/08 MSF - Use Start... and StopProductServices() to stop > VESTA and > Setup.rul:// 03/31/08 MSF - Use Start... and StopProductServices() to stop > VESTA and > NTService.h:// 09/07/07 MSF - New functions StopProductServices(), > NTService.h:// SafeStopProductServices() and > DisableProductServices(). > NTService.h:// 03/24/08 MSF - Make StopProductServices(), > SafeStopProductServices() and > > Here is what I thought I would get: > > NTService.rul:function StopProductServices(sProduct) > NTService.rul:function SafeStopProductServices(sProduct) > NTService.rul: bServicesStopped = StopProductServices(sProduct); > Setup.rul: StopProductServices(@PRODUCT_NAME); > Setup.rul: StopProductServices(VESTA_VIEW); > NTService.h:prototype StopProductServices(STRING); > NTService.h:prototype SafeStopProductServices(STRING);
Try: "grep -v ^\s*/" which means: ignore all lines whose first non-whitespace character is forward slash. -- Kam-Hung Soh <a href="http://kamhungsoh.com/blog";>Software Salariman</ a>
