procfs

I want to create a file under a /proc/driver directory. I would like to use a macro like proc_root_driver (or something else provided) rather than use "driver/MODULE_NAME" explicitly. I use create_proc_entry : struct proc_dir_entry *simpleproc_fops_entry; simpleproc_fops_entry = create_proc_entry(MODULE_NAME, 0400, NULL /* proc_root_dir */); After googling, I found suggestion to use proc_root_driver , but when I use it, I get the error proc_root_driver undeclared in this function And also, proc_root_driver is not available in linux/proc_fs.h. I have tried to declare structure like this: struct

Im working on an app to collect and send various bits of system info (partition space/free, laptop battery info, etc). Im not having much success getting this information in the form of direct c++ api.. though its all available via files in /proc (or similar). So - I'm wondering whether reading/parsing these files in my c++ app is the appropriate way to get this info or should I keep trying to discover APIs? ( NOTE: I am working with statvfs ). So far it looks like it's easier to gather this sort of info in Win32. Seems strange. It is best practice by far to stick with an API in the following

I need to calculate CPU usage (user mode, system mode, idle time) of a process in Linux. I am able to calculate usage in user and system mode using utime and stime values from /proc/PID/stat , but I found nothing which is related to idle time. I know I can get idle time from /proc/stat but this value is related to machine, not for particular process. Is it possible to calculate idle time of a process knowing its PID (reading data from /proc directory)? I don't know much about it but maybe the following works: 1) Get the process start up time. Im sure thats possible 2) Generate time difference

I'm Curious about 2 things, What is the closest equivalent to /proc that ships with windows Are there any products which add a proc like filesystem to windows? Task manager Cygwin , giving Windows a Linux environment, certainly allows a Windows program to use /proc . Grim It would help if you explained what your final goal is. What are you trying to do? For managing processes on windows you have the following options: Windows ships with Task Manager (taskmgr.exe) A better more versatile alternative is a tool called Process Explorer You also have the command line utility called tasklist.exe

Edit: I have found seq_file that eases writing a lot of data from kernel to user-space. What I am looking for is the opposite; an API that facilitates reading a lot of data (more than one page) from user-space. Edit 2 : I am implementing a port of <stdio.h> as a kernel module that would be able to open /proc (and later, other virtual file systems) similar to FILE s and handle input and output similar to <stdio.h> . You can find the project here . I have found a LOT of questions on how the kernel can write large amounts of data to /proc (for user-space programs to take), but nothing for the