plz help me
#include <sys/types.h>
#include <stdio.h>
#include <unistd.h>
int value = 10;
int main() {
pid_t pid;
pid = fork();
if (pid == 0) {
value = value + 100;
}
else if (pid > 0) {
value = value -100;
printf("PARENT: value= %d \n", value); //Line A
wait (NULL); }
}
(i) What will be the output in Line A? Justify your answer.
(ii) Do you think there is synchronization problem in updating the variable value?
Justify your answer.Homework Answers
Request Answer!
We need at least 9 more requests to produce the answer.
1 / 10 have requested this problem solution
The more requests, the faster the answer.
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;
Systems Programming Purpose: Understand the fork() regarding its returning values, global/local variables declared in the parent's...
Systems Programming Purpose: Understand the fork() regarding its returning values, global/local variables declared in the parent's process, and processing Instruction: Attached is a lab.c file containing a fork() statement. Compile and run it. Explain the output of this program. Thing to submit: Submit a word file to explain the following questions: When fork() is executed, what is happening to the returning values in parent and in child? After fork() is executed, how many more process is created? What is the...
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...
OPERATING SYSTEMS QUESTION: Given the code below: int main() { pid_t pid; int value = 10;...
OPERATING SYSTEMS QUESTION: Given the code below: int main() { pid_t pid; int value = 10; pid = fork(); if (pid == 0) { /* child */ value += 8; printf(“CHILD: value = %d\n”, value); /* Line A */ exit(0); } else { /* parent */ value += 5; wait(NULL); \ printf(“PARENT: value = %d\n”, value); /* Line B */ exit(0); } } What is printed at Line B? Explain why in a few sentences.
What is the output? #include <sys/types.h> #include <sys/wait.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> int main()...
What is the output? #include <sys/types.h> #include <sys/wait.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> int main() { int x = 5; int y = 2; int z = 30; x = fork(); y = fork(); if (x != 0) printf("Type 1\n"); if (y != 0) printf("Type 2\n"); z = fork(); if (x > 0 || y > 0 || z > 0) printf("Type 3\n"); if (x == 0 && y == 0 && z != 0) printf("Type 4\n"); if (x...
Suppose that you have three programs that are suppose to print a house diagram in a...
Suppose that you have three programs that are suppose to print a house diagram in a collaborative manner. (i) prog1.c #include <stdio.h> /* Input/Output */ #include <stdlib.h> /* General Utilities */ int main() { printf(“ ^^^^^^^^^^^^ \n”); printf(“ ^^^^^^^^^^^ ^^^^^^^^^^^ \n”); printf(“^^^^^^^^^^^ ^^^^^^^^^^^ \n”); printf(“ | | \n”); printf(“ | | \n”); exit(1); } (i) prog2.c #include <stdio.h> /* Input/Output */ #include <stdlib.h> /* General Utilities */ int main() { printf(“ | | ...
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)...
Rewrite the program as a set of two programs that utilize a named pipe “ages” in...
Rewrite the program as a set of two programs that utilize a named pipe “ages” in the current folder for IPC and implement the same function as discussed above. #include <stdio.h> #include <unistd.h> #include <stdlib.h> #include <sys/types.h> int main(void) { int fd[2], nbytes; pid_t childpid; int users = 95; char mystring[80]; char readbuffer[80]; char digit1,digit2; digit1 = (char) users%10; digit2 = (char ) users/10; mystring[0] = digit1; mystring[1] = digit2;...
Combine two codes (code 1) to get names with(code 2) to get info: Code 1: #include<unistd.h>...
Combine two codes (code 1) to get names with(code 2) to get info: Code 1: #include<unistd.h> #include<sys/types.h> #include<sys/stat.h> #include<fcntl.h> #include<dirent.h> #include<stdio.h> #include<stdlib.h> void do_ls(char []); int main(int argc,char *argv[]) { if(argc == 1) do_ls("."); else while(--argc){ printf("%s:\n",*++argv); do_ls(*argv); } } void do_ls(char dirname[]) { DIR *dir_ptr; struct dirent *direntp; if((dir_ptr = opendir(dirname)) == NULL) fprintf(stderr,"ls1:cannot open %s\n",dirname); else { while((direntp = readdir(dir_ptr)) != NULL) printf("%s\n",direntp->d_name); closedir(dir_ptr); } } ____________________________ code 2: #include <stdio.h> #include <sys/types.h> #include <sys/stat.h> void show_stat_info(char *,...
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;
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...
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)...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 10 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 10 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 10 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 10 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 10 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 10 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 10 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 10 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 10 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 10 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 10 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 10 months ago