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Counter for main() in Linux OS

i want to implement a counter in Linux which keep a track of how many times
main() is called by any process.

when i start this counter thing as a process, from that time it will tell me how many times main() was called not by my program but in the entire OS system

example:
i start this as a daemon and then i create a simple code

#include <stdio.h>

int main()
//some code
return 0;



Now here main is called so the counter will increment by one.

Can anyone explain me how can this be done.?

thanks

2 Answers
2

You might want to take a look at: Proc connector and socket filters

The Proc Connector and Socket Filters Posted on February 9, 2011 by scott

The proc connector is one of those interesting kernel features that most people rarely come across, and even more rarely find documentation on. Likewise the socket filter. This is a shame, because they’re both really quite useful interfaces that might serve a variety of purposes if they were better documented.

The proc connector allows you to receive notification of process events such fork and exec calls, as well as changes to a process’s uid, gid or sid (session id). These are provided through a socket-based interface by reading instances of struct proc_event defined in the kernel header....

main() is just a abstract code; assembler uses functions' name as a hint, and converts them into numbers. So you can't implement such counter.

main() is usually called once, what you mean may be a program which counts how many programs are executed.

There is popen in Linux which performs the given command, and yields the result as FILE *, so you can execute the ps command and parse it to get the list of the processes. You can continuously invoke popen and count the number of programs.

popen

ps

char Buffer[1024];
sprintf(Buffer,"ps ");
FILE *ptr = popen(Buffer, "r");
if(NULL != ptr)

while(fgets(Buffer, sizeof(Buffer),ptr));
pclose(ptr);

// Now the list of processes are in Buffer


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