Homework Answers
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#include <stdio.h>
#include <ntsid.h>
#include <zconf.h>
#include <stdlib.h>
int x = 4;
int main ()
{
pid_t pid = fork();
if (pid == 0){
printf("In Child process: x =
%d\n", --x);
exit(0);
}
printf("In parent processs: x = %d\n",
++x);
return 0;
}
-------------------------------------------------------------------------------------------------
//output
In Child process: x = 3
In parent processs: x = 5
![| Fork [-/CLionProjects/Fork] - ../main.c -Fork main.c * ÷ *ー △CMakeLists.txtー..maine #include <stdio.h> #include <ntsid.h> i](http://img.homeworklib.com/questions/a7ddbc20-1e45-11eb-af9d-39bea220f46f.png?x-oss-process=image/resize,w_560)
Add Answer to:
Figure 〈 1013 > int main pid t pidfork if (pid0) printt "In child process: x*d\n",-x)...
Source code to modify: #include <stdio.h> #include <unistd.h> #include <sys/types.h> int main() { pid_t pid; /*fork...
Source code to modify:
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
int main()
{
pid_t pid;
/*fork a child process*/
pid = fork();
if (pid<0){ /*error occured*/
fprintf(stderr,"Fork failed\n");
return 1;
}
else if (pid == 0) { /*child process */
printf("I am the child %d\n",pid);
execlp("/bin/ls","ls",NULL);
}
else { /*parent process */
/*parent will wait for the child to complete*/
printf("I am the parent %d\n",pid);
wait(NULL);
printf("Child Complete\n");
}
return 0;
}
1. Write program codes for 3.21 a and...
Q1) Including the initial parent process, how many processes are created by the program shown in...
Q1) Including the initial parent process, how many processes are created by the program shown in Figure 1? Give an explanation for your answer. You can include an output statement to test and run the program. A sample output statement could be: printf("Testing......"); #include <stdio.h> #include <unistd.h> int main() { /*fork a child process*/ fork(); /*fork another child process*/ fork(); /*fork another child process*/ fork(); return 0; } Figure 1a - How many processes are created? Another version, now displaying...
Modify the program in Figure 8.18 so that the following two conditions are met: 1. Each...
Modify the program in Figure 8.18 so that the following two
conditions are met:
1. Each child terminates abnormally after attempting to write to a
location in the read-only text segment.
2. The parent prints output that is identical (except for the PIDs)
to the following: child 12255 terminated by signal 11: Segmentation
fault
child 12254 terminated by signal 11: Segmentation fault
Modify your solution to Problem 8.24 so that one (and only one)
child installs a Segmentation-fault handler which...
Consider the following program: 1int main) 2nt count1; 3 int pid 0,pid2-0 4if ((pid - fork))) cou...
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...
Linux & C code help with creating a child process and kills itself with SIGNAL. I...
Linux & C code help with creating a child process and kills itself with SIGNAL. I provided most of the code, I need some help to finish. Please provide output screen shot as well. Thank you! A Process creates a child process. Child process will print out "hello 0" "hello 1" ..... 1 line per second. After a certain number of seconds(user input), it kills itself WITH signal mechanism ONLY, don't use exit() on the child. You can use alarm()...
Directions: use only the signal mechanism system calls don’t use ( wait() or pipe() )in this...
Directions: use only the signal mechanism system calls don’t use ( wait() or pipe() )in this problem. You can still read/write from/to a file. You must use ( kill() and pause() ) system calls. rewrite code below to do kill and pause system calls #include <fcntl.h> #include <unistd.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/wait.h> // Function ptototypes int readX(); void writeX(int); int main() { int pid; // pid: used to keep track of the child process int x...
Write a “C” program that creates a child process that prints out its pid and new...
Write a “C” program that creates a child process that prints out its pid and new line and then calls pause() system call. Once it returns from the pause system call the child program must exit with code 5. The parent program must wait for the child process and print out the pid of the child process and the exit status with the following format: “childpid=%d,exitstatus=%d\n”.
Problem la Points (20) Draw the process tree for the program shown below. #include<sys/types.h> #include<stdio.h> #include<unistd.h>...
Problem la Points (20) Draw the process tree for the program shown below. #include<sys/types.h> #include<stdio.h> #include<unistd.h> int value = 5; int main() pid_t pid; pid = forko; if(pid ==0) { */ Child Process */ forkO; value += 15; return 0; else if (pid > 0) {/* Parent process */ forkO; forkO; wait(NULL); printf("Parent: value = %d", value); /* LINE A */ return 0;
With explanation Please. #include #include <sys/types.h> <unistd.h> int main void ) fork fork fork execip (...
With explanation Please.
#include #include <sys/types.h> <unistd.h> int main void ) fork fork fork execip ( "/bin/ls", return 0 /* Line A /* Line B/ /*Line C/ /. Line D ./ "ls", NULL); Answer the following: (a) Including the initial parent process, how many processes are created by the program? (b) Answer (a) assuming that lines C and D are interchanged in the program (c) Answer (a) assuming that lines B and D are interchanged (instead of C and D)...
Source code to modify:
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
int main()
{
pid_t pid;
/*fork a child process*/
pid = fork();
if (pid<0){ /*error occured*/
fprintf(stderr,"Fork failed\n");
return 1;
}
else if (pid == 0) { /*child process */
printf("I am the child %d\n",pid);
execlp("/bin/ls","ls",NULL);
}
else { /*parent process */
/*parent will wait for the child to complete*/
printf("I am the parent %d\n",pid);
wait(NULL);
printf("Child Complete\n");
}
return 0;
}
1. Write program codes for 3.21 a and...
Modify the program in Figure 8.18 so that the following two
conditions are met:
1. Each child terminates abnormally after attempting to write to a
location in the read-only text segment.
2. The parent prints output that is identical (except for the PIDs)
to the following: child 12255 terminated by signal 11: Segmentation
fault
child 12254 terminated by signal 11: Segmentation fault
Modify your solution to Problem 8.24 so that one (and only one)
child installs a Segmentation-fault handler which...
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...
Problem la Points (20) Draw the process tree for the program shown below. #include<sys/types.h> #include<stdio.h> #include<unistd.h> int value = 5; int main() pid_t pid; pid = forko; if(pid ==0) { */ Child Process */ forkO; value += 15; return 0; else if (pid > 0) {/* Parent process */ forkO; forkO; wait(NULL); printf("Parent: value = %d", value); /* LINE A */ return 0;
With explanation Please.
#include #include <sys/types.h> <unistd.h> int main void ) fork fork fork execip ( "/bin/ls", return 0 /* Line A /* Line B/ /*Line C/ /. Line D ./ "ls", NULL); Answer the following: (a) Including the initial parent process, how many processes are created by the program? (b) Answer (a) assuming that lines C and D are interchanged in the program (c) Answer (a) assuming that lines B and D are interchanged (instead of C and D)...
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