What does fork() actually return?

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Another great explanation

attituderecord

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mateicojo

@CodeVault when a child is created it will have all lines of code that is below the fork() statement right?
but here fork() is assigned to id and its in the same line . so how does child id gets value 0?
if the child gets all the set values from parent then the id should be +ve ???

abhijitarun

Child process continues from the the fork statement,
and what happens to memory is also interesting.
The child gets a copy of all the set values by the parent. Unless the variables are a pointers.
Is that correct?

vilijanac

could you pls explain why this code prints 4 times hello ?

int main() {
int pid, pid2;
pid = fork();
if (pid){
pid2 = fork();
printf("hello");
}
else {
printf("hello");
pid2 = fork();
}
return 0;
}

tendulkarzone

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