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
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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;
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...
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(“ | | ...
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...
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 *,...
M ALL ELEG220 LABS jamalbaraka X Race Condition in operating syst X o Mail- Jamal A...
M ALL ELEG220 LABS jamalbaraka X Race Condition in operating syst X o Mail- Jamal A Baraka Outlook nments.dk X Lauk.edu.kw/pluginfile.php/214840/mod_resource/content/1/Assignment-1.pdf 1. Including the initial parent process, how many processes are created by the program shown in the following Figure? #include <stdio.h> #include <unistd.h> int nain) int i for (i 0; i< 4; i++ ) fork); return 0; Using the program shown in the following Figure, explain what the output will be at lines X and Y. 2. include ays/types.h...
modify the code for timer_test_02.c to allow the time delay between events to be pseudo- random...
modify the code for timer_test_02.c to allow the time delay between events to be pseudo- random exponential, with a mean time between arrivals of 0.1 second. Change the limit in the time_stamps() function from 5 time-stamps to 10, so that the mean run-time will be about 10*0.1 = 1.0 seconds. Once this is working, you should be able to generate 10 events with a pseudo-random exponential arrival process. The code is: #include <stdio.h> #include <stdint.h> #include <time.h> #include <unistd.h> #include...
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)...
M ALL ELEG220 LABS jamalbaraka X Race Condition in operating syst X o Mail- Jamal A Baraka Outlook nments.dk X Lauk.edu.kw/pluginfile.php/214840/mod_resource/content/1/Assignment-1.pdf 1. Including the initial parent process, how many processes are created by the program shown in the following Figure? #include <stdio.h> #include <unistd.h> int nain) int i for (i 0; i< 4; i++ ) fork); return 0; Using the program shown in the following Figure, explain what the output will be at lines X and Y. 2. include ays/types.h...
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