fork() method is used for creating a new process, which is called the child process, which runs concurrently with the process that makes the fork() call (parent process)
Fork method can return 3 possible value
1 positive (Returned to parent or caller.)
2 zero (Returned to the newly created child process.)
3 negative ( when it fails)
So there can be 3 possible outputs depending on each scenario
Output 1
5
2
Output 2
5
Output 3 // when creating child process fails
2
Consider the following pseudo code. What are the possible outputs (.e., the complete output from each...
Given the following pseudo-code, please show what the outputs will be at LINE A, B, C and D. please put down “inconclusive” if you think the CPU process scheduling could potentially result in multiple values for integer i. You will receive partial credit if you draw the process tree. int i = 0; int main(){ if (fork() == 0) { i++; if (fork() == 0){ if (fork() == 0){ i++; print value...
What is the output of the following code: void forkexample() { int x = 1; if (fork==0) printf(“ Child has x = %d\n”, ++x); Else printf(“ Parent has x = %d\n”, - - x); } int main () { forkexample(); Return 0; }
2Processes. Use the following assumptions to answer the questions: » All processes run to completion and no system calls will fail printf ( is atomic and calls fflush (stdout) after printing argument(s) but before returning 1 int main) ( int status, pid, pid2 pid -fork O if (pid0) printf ("A") else pid2 fork ) if (pid20) printf ("C"); waitpid (pid, &status, 0) printf("D") 4 10 12 13 return; ) else ( printf("B") 14 15 17 19 return 0; 20 [8...
I have the following code in C: void sighandler(int sig) { printf("exiting child..."); } int main(int argc,char* argv[]) { if(argc > 1) { char* commandName; for(int i=2;i { forkChild = fork(); signal(SIGINT,sighandler); if(forkChild == 0) { execlp(commandName,commandName,argv[i],NULL); exit(0); } else { wait(NULL); } } My problem is that I would like to kill the child with ^C but leave the parent running....
Consider the following program: 1int main) 2nt count1; 3 int pid 0,pid2-0 4if ((pid - fork))) count-count 2; printf("%d ", count); 8 if (count 1) count++ pid2-fork) printf("%d ", 12 13 14 if(pid2){ 15 16 17 18 19 > count); wa i tpid(pid2, NULL, θ); countcount*2; printf("%d ", count); a. How many processes are created during the execution of this program? Explain b. List all the possible outputs of the program c. If we delete line 15 (the waitpid) show...
C Programming
I was given this code to display the following as the output but it
does not seem to work. what is wrong? or can someone guide me
through the steps? thanks!
I have created the txt file named myfile.txt but the program will
not compile. please help. I am forced to use Microsoft visual
studio.
This program makes a duplicate copy of a file (reads input from a file and write output to another file) 1 #include <stdio.h>...
Complete the following C code by filling all “???”sto write a C program to create a child process. Before the child process is created, an integer variable A is defined and assigned value 10. Then in the child process, A is reduced by 5. After the child process completes, the parent process increases A by 5. Then what will A’s value be just before the parent process completes? Why? Write the code and run it to verify your answer. #include...
Consider the following pseudo-code fragment. What is the value of mystery(2, 3)? BEGIN PROGRAM mystery(int a, int b) IF (b==1) RETURN a END IF ELSE RETURN a + mystery(a, b - 1) END ELSE END PROGRAM mystery 2 4 6 8 the program generates a run time error (infinite recursion) I have no idea
QUESTION 6 What is the output of following C code? struct numbers { int x = 2; int y = 3; } int main() { struct numbers nums; nums.x = 110; nums.y = 100; printf("%d\n%d", nums.x, nums.y); return 0; } A. Compile-time Error B. 110 100 C. 2 3 D. Run-time Error 2 points QUESTION 7 What is the output of following C code? typedef struct student { char *stud; }s1; int main() { s1 s; s.stud...
I have the following code....from the previous lab....the above
needs to be added to what is already existing. ALSO MODIFY
SEMAPHORES TO USE pthreads instead of the pipe constructs P() &
V()
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#include <sys/wait.h>
#include <stdlib.h>
#include <sys/stat.h>
void printStat(char *filename);
//Main
int main(int argc, char *argv[])
{
//Process Id (storing)
pid_t pid;
int j;
//printf("Welcome to Project Three\n”);
// For loop*/
for (j = 1; j...