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Change to functions and kill children

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This commit is contained in:
Isaac Shoebottom 2023-09-26 16:16:09 -03:00
parent ca9bab7416
commit 4392a02488
1 changed files with 71 additions and 56 deletions
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127
Assignment2/main.c
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@ -10,74 +10,89 @@ void print_prompt() {
printf("[%d]> ", getpid());
}
void one_child() {
print_prompt();
printf("Hello, I am a parent process\n");
if (fork() == 0) { // Child process
print_prompt();
printf("Hello, I am a child process\n");
exit(0);
} else { // Parent process
wait(NULL);
}
}
void add_numbers() {
int number = 1;
int send_to_child[2];
int receive_from_child[2];
pipe(send_to_child);
pipe(receive_from_child);
if (fork() == 0) { // Child process
int subtotal = 0;
while (number != 0) {
// Read the numbers from the send_to_child pipe
read(send_to_child[0], &number, sizeof(int));
// Add the number to the subtotal
subtotal += number;
print_prompt();
printf("The subtotal is %d\n", subtotal);
// Write the sum to the receive_from_child pipe
write(receive_from_child[1], &subtotal, sizeof(int));
}
exit(0);
} else { // Parent process
int total = 0;
while (number != 0) {
print_prompt();
printf("Please input a number, 0 to terminate: ");
// Read the number from the user, and convert it to an int
char buffer[100];
fgets(buffer, 100, stdin);
number = atoi(buffer);
// Display what was entered
print_prompt();
printf("You entered %d\n", number);
// Write to child process
write(send_to_child[1], &number, sizeof(int));
// Read the total from the child process
read(receive_from_child[0], &total, sizeof(int));
}
wait(NULL);
print_prompt();
printf("The total is %d\n", total);
}
close(send_to_child[0]);
close(send_to_child[1]);
close(receive_from_child[0]);
close(receive_from_child[1]);
}
int main() {
bool is_looping = true;
// Listen loop
while (is_looping) {
char input[100];
print_prompt();
char input[100];
fgets(input, 100, stdin); // Input for commands
if (strcmp(input, "stop\n") == 0) { // Stop command
is_looping = false;
}
if (strcmp(input, "onechild\n") == 0) { // One child command
if (fork() == 0) { // Child process
print_prompt();
printf("Hello, I am a child process\n");
exit(0);
} else { // Parent process
print_prompt();
printf("Hello, I am a parent process\n");
wait(NULL);
}
one_child();
}
if (strcmp(input, "addnumbers\n") == 0) { // Add numbers command
int number = 1;
int send_to_child[2];
int receive_from_child[2];
pipe(send_to_child);
pipe(receive_from_child);
if (fork() == 0) {
int subtotal = 0;
while (number != 0) {
// Read the numbers from the send_to_child pipe
read(send_to_child[0], &number, sizeof(int));
// Add the number to the subtotal
subtotal += number;
print_prompt();
printf("The subtotal is %d\n", subtotal);
// Write the sum to the receive_from_child pipe
write(receive_from_child[1], &subtotal, sizeof(int));
}
exit(0);
} else {
int total = 0;
while (number != 0) {
print_prompt();
printf("Please input a number, 0 to terminate: ");
// Read the number from the user, and convert it to an int
char buffer[100];
fgets(buffer, 100, stdin);
number = atoi(buffer);
// Display what was entered
print_prompt();
printf("You entered %d\n", number);
// Write to child process
write(send_to_child[1], &number, sizeof(int));
// Read the total from the child process
read(receive_from_child[0], &total, sizeof(int));
}
print_prompt();
printf("The total is %d\n", total);
}
add_numbers();
}
if (strcmp(input, "exec\n")) {
if (strcmp(input, "exec\n") == 0) {
char *args[2];
args[0] = "/bin/ls";
args[1] = NULL;
@ -96,4 +111,4 @@ void temp() {
}
//split buffer on spaces into input array
sscanf(buffer, "%s %s %s %s %s", input[0], input[1], input[2], input[3], input[4]);
};
}