[Crash-utility] extension module: crash-extscript

Hi Dave, I have uploaded an extension module named extscript to github Link: https://github.com/vinayakmenon/crash-extscript Will it be possible to advertise it on crash utility extension page ? Extension module for crash utility, to talk to external scripts What is extscript utility for ? At times we need to execute a series of crash commands to arrive at a result. i.e. we execute a command, get the output, pick an element from it, use it with the next command and so on. There are cases when this may take several steps. This utility is to automate these steps. Another use can be to execute a series of predefined crash commands, parse it to get relevant info and to generate a bug report. A brief on the components in this package. (1) A crash utility extension called 'extscript'. This provides a crash command of the same name. (2) A script. perlfc.pl is an example script, which can talk to extscript extension. This script can be used as an example to write utilities that can talk to extscript extension. (3) A protocol definition, for communication between 'extscript' and the external script. The external script is run as a server by crash utility, when you invoke the extscript command. The external script serves the crash utility by additonal commands. The script is not executed as is. We invoke the script from crash command line. In other words, we talk to the script from within the crash utility command line. An example. (1) Copy the extscript.c to extensions folder (2) make extensions (3) Copy perlfc.pl to crash directory. crash> extend extensions/extscript.so crash> extscript -f perl -a perl -a ./perlfc.pl crash> extscript -b vmallocinfo crash> extscript -b help The first command loads the extscript module and adds the command "extscript" to crash utility. The second command sets up the environement. This is similar to how we pass arguments to execlp. The last argument is the script path. This command has to be modified depending on the kind of script that we are running. The third command is the bypass command which actually executes the command we have encoded in the script. In this case "vmallocinfo" is a command that is defined in perlfc.pl. The extecript bypasses this command to the script. The output in this case will be vmallocinfo similar /proc/vmallocinfo, displayed on crash console. Thus in simple words we are extending crash with additoinal commands encoded in a script. The "help" command shows all the commands supported by the script and its usage. See project page in github for more info. Thanks, Vinayak