Few Questions on C++

[Lalit Seth]

Hi,

1) how do i get the PID from a process of which i know the name only

2) how can i send a signal to a process of which I have the PID

Many Thanks

[Lalit Seth]

I want to acheive these in C++ Code.

[Geetha.R]

You can use system command.
system("ps -eaf |cut -1"); (cut to just get the PID column).
I am not sure about the second question.

[Lalit Seth]

Thanks

This results in printing the output to console. instead is there any way i can store the info in some C++ variable or in structure.

[Geetha.R]

system("ps -eaf |cut -1 > file1.txt");
you can redirect the output to a file like this & you can read the file & store the PID in a variable.
I am not sure if there are any shortcut methods available for this.

[Fred Ruffet]

A more C/C++ way to do it :

have a look at "man 2 kill" and "man pstat".
"man signal will also help you.

Regards,

Fred

[Craig Smith_13 · Accepted solution]

One way is to use popen() instead:

#include

FILE *fp;
char result[81];


fp = popen(" your command line ");

while (fgets(result, 80, fp) != NULL) {
}