I have a simple C program and when I compile and run it with ./output, does it get a PID on Linux? (I think, every running program is a process and it should have a PID.)
I used the ps aux command but I couldn't find the process name there.
I remember, when my console application (a C program) was running on Windows 7, I was able to get its PID via the Volatility tool.
#include<stdio.h> void main() { printf("Hello World!"); } Yes, every running program on Linux gets a PID.
Your program just prints "Hello, World!", and will complete so quickly that by the time you run ps aux it will have finished.
Also, void main() should be int main(void), and you should add \n to the end of your output string.
It should. just printf getpid() in you program to see it.
Or just add a sleep so that you can find the process ID. Probably ran whilst you blinked.
Use this code and in a separate terminal run ps
#include <stdio.h> #include <unistd.h> int main(void) { printf("Hello World!\n"); sleep(3600); printf("Are you bored yet?\n"); } You can get it using getpid
int main() { pid_t pid; printf("Hello World!"); printf("pid of program is %d" , getpid()); } or just use your code and put it into background.
void main() { printf("Hello World!"); } Output:
[xxxxx@localhost ~]$ ./c1 & [1] 3007 3007 Yes, every process gets a PID while it is being run. Since this C program seems to a very short-lived process, it might be completing before you could even run your ps aux command to get its PID. Try calling getchar() or a scanf() that would wait for user input and then run the ps command from a different terminal to see the PID.
getch() function provided by ncurses is not the same as the getch() function on Windows.