Very Computer

    I'm trying to retrieve the memory usage of current process, as the ps
command does. I did not find the source code for this command, then
I ask here if anybody could help in this issue. I found the getrusage system
call, but the linux implementation (and most of implementation) is not
complete, making this call quite useless.
    Any idea ?

David

    David>     Hello, I'm trying to retrieve the memory usage of
    David> current process, as the ps command does. I did not find the
    David> source code for this command, then I ask here if anybody
    David> could help in this issue. I found the getrusage system
    David> call, but the linux implementation (and most of
    David> implementation) is not complete, making this call quite
    David> useless.  Any idea ?

Use the /proc filesystem. If you want to retrieve detailed memory
usage on your own process, you can read the following files (textual
files)

  /proc/self/status - which has a VmSize: line
  /proc/self/stat
  /proc/self/statm

and the whole memory map is

  /proc/self/maps

If you want to know about another process, for example the process of
pid 1234, use /proc/1234/status /proc/1234/maps etc...

The detailed format of the output of /proc files is documented in the
kernel sources, in particular in
/usr/src/linux/Documentation/filesystems/proc.txt

[If David is frenchspeaking he could email me in French if he wishes]

--

Basile STARYNKEVITCH         http://starynkevitch.net/Basile/
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