System Call Program in C Programming

YASH PAL,

In this post, we are going to write a system call program in C programming. We are going to use the SYS_getpid function to write a program. This function is used to get the process identification.

#include <syscall.h>
#include <unistd.h>
#include <stdio.h>
#include <sys/types.h>

int main(void){
    long ID1, ID2;
    
    ID1 = syscall(SYS_getpid);
    printf("syscall (SYS_getpid) = %ld\n",ID1);
    
    ID2 = getpid();
    printf("getpid() = %ld\n",ID2);
    return(0);
}

Output

syscall (SYS_getpid) = 3
getpid() = 3
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