Consider the following C program: #include <sys/wait.h> main() { int status; pri

Question

Consider the following C program:
#include <sys/wait.h>
main() {
int status;
printf("%s ", "Hello");
printf("%d ", !fork());
if(wait(&status) != -1)
printf("%d ", WEXITSTATUS(status));
printf("%s ", "Bye");
exit(2);
}
Recall the following:
• Function fork returns 0 to the child process and the child’s process Id to the parent.
• Function wait returns -1 when there is an error, e.g., when the executing process has no child.
• Macro WEXITSTATUS extracts the exit status of the terminating process.
What is a valid output of this program? Hint: there are several correct solutions.

Explanation / Answer

Output:

Hello

1

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