Setting the thread /proc/PID/cmdline?

Question

On Linux/NPTL, threads are created as some kind of process.

I can see some of my process have a weird cmdline:

cat /proc/5590/cmdlin         


        

Answer 1

argv points to writable strings. Just write stuff to them:

#include 
#include 

int
main(int argc, char** argv)
{
    strcpy(argv[0], "Hello, world!");
    sleep(10);
    return 0;
}