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@HasanYahya101
HasanYahya101 committed Oct 18, 2024
1 parent 0a51122 commit f31a287
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7 changes: 7 additions & 0 deletions Lab_08/Question_01/Makefile
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all:
gcc main.c -o main

clean:
rm -f main

.PHONY: all clean
187 changes: 187 additions & 0 deletions Lab_08/Question_01/main.c
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>

#define FIFO_NAME "/tmp/fifo"
#define BUFFER_SIZE 1024

int count_vowels(const char *word)
{
int count = 0;
while (*word)
{
if (strchr("AEIOUaeiou", *word))
{
count++;
}
word++;
}
return count;
}

void find_word_with_most_vowels(const char *sentence, char *result)
{
char *token;
char *sentence_copy = strdup(sentence);
int max_vowels = 0;

token = strtok(sentence_copy, " ");
while (token != NULL)
{
int vowels = count_vowels(token);
if (vowels > max_vowels)
{
max_vowels = vowels;
strcpy(result, token);
}
token = strtok(NULL, " ");
}

free(sentence_copy);
}

int main(int argc, char *argv[])
{
if (argc != 2)
{
printf("Error: Pass in filename as cmd argument\n");
exit(1);
}

if (access(FIFO_NAME, F_OK) == 0)
{
printf("FIFO already exists.\n");
}
else
{
if (mkfifo(FIFO_NAME, 0666) == -1)
{
printf("Error creating FIFO");
exit(1);
}
else
{
printf("FIFO created successfully.\n");
}
}

pid_t pid1, pid2;
int fd;
if ((pid1 = fork()) == 0)
{
FILE *file = fopen(argv[1], "r");
if (!file)
{
printf("Error: File not found\n");
exit(1);
}
else
{
printf("File opened successfully\n");
}

fd = open(FIFO_NAME, O_WRONLY);
if (fd == -1)
{
printf("Error: File not opening\n");
exit(1);
}
else
{
printf("FIFO opened successfully\n");
}

char buffer[BUFFER_SIZE];
while (fgets(buffer, BUFFER_SIZE, file))
{
write(fd, buffer, strlen(buffer));
}

const char end_marker[] = "END";
write(fd, end_marker, sizeof(end_marker));

close(fd);
fclose(file);
exit(0);
}

if ((pid2 = fork()) == 0)
{
fd = open(FIFO_NAME, O_RDONLY);
if (fd == -1)
{
printf("Error: File not opening\n");
exit(1);
}

char buffer[BUFFER_SIZE];
char content[BUFFER_SIZE * 10] = "";
ssize_t bytes_read;

while ((bytes_read = read(fd, buffer, BUFFER_SIZE - 1)) > 0)
{
buffer[bytes_read] = '\0';
if (strcmp(buffer, "END") == 0)
{
break;
}
strcat(content, buffer);
}

close(fd);

char *sentence = strtok(content, ".");
char longest_sentence[BUFFER_SIZE] = "";

while (sentence != NULL)
{
if (strlen(sentence) > strlen(longest_sentence))
{
strcpy(longest_sentence, sentence);
}
sentence = strtok(NULL, ".");
}

char word_with_most_vowels[BUFFER_SIZE] = "";
find_word_with_most_vowels(longest_sentence, word_with_most_vowels);

FILE *result_file = fopen("result.txt", "w");
if (!result_file)
{
printf("Error: File not opening\n");
exit(1);
}

fprintf(result_file, "Longest sentence: %s\n", longest_sentence);
fprintf(result_file, "Word with the most vowels: %s\n", word_with_most_vowels);
fclose(result_file);

exit(0);
}

waitpid(pid1, NULL, 0);
waitpid(pid2, NULL, 0);

FILE *result_file = fopen("result.txt", "r");
if (!result_file)
{
printf("Error: File not opening\n");
exit(1);
}

char result_buffer[BUFFER_SIZE];
while (fgets(result_buffer, BUFFER_SIZE, result_file))
{
printf("%s", result_buffer);
}

fclose(result_file);
unlink(FIFO_NAME);

return 0;
}
7 changes: 7 additions & 0 deletions Lab_08/Question_02/Makefile
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all:
gcc main.c -o main

clean:
rm -f main

.PHONY: all clean
136 changes: 136 additions & 0 deletions Lab_08/Question_02/main.c
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/wait.h>

int main(int argc, char *argv[])
{
if (argc < 4)
{
printf("Error: Please enter rows, cols, and the matrix data as cmd args\n");
return 1;
}

int totalElements = atoi(argv[1]) * atoi(argv[2]);

if (argc != totalElements + 3)
{
printf("Error: Please enter the correct number of elements\n");
return 1;
}

int rows = atoi(argv[1]);
int cols = atoi(argv[2]);
int matrix[rows][cols];
int index = 3;

for (int i = 0; i < rows; i++)
{
for (int j = 0; j < cols; j++)
{
matrix[i][j] = atoi(argv[index++]);
}
}

int pipe1[2], pipe2[2], pipe3[2];
pipe(pipe1);
pipe(pipe2);
pipe(pipe3);

if (fork() == 0)
{
close(pipe1[0]);
int rowSums[rows];
for (int i = 0; i < rows; i++)
{
rowSums[i] = 0;
for (int j = 0; j < cols; j++)
{
rowSums[i] += matrix[i][j];
}
}
write(pipe1[1], rowSums, sizeof(rowSums));
close(pipe1[1]);
exit(0);
}
else
{
wait(NULL);
}

if (fork() == 0)
{
close(pipe2[0]);
int colSums[cols];
for (int j = 0; j < cols; j++)
{
colSums[j] = 0;
for (int i = 0; i < rows; i++)
{
colSums[j] += matrix[i][j];
}
}
write(pipe2[1], colSums, sizeof(colSums));
close(pipe2[1]);
exit(0);
}
else
{
wait(NULL);
}

if (fork() == 0)
{
close(pipe3[0]);
int overallSum = 0;
for (int i = 0; i < rows; i++)
{
for (int j = 0; j < cols; j++)
{
overallSum += matrix[i][j];
}
}
write(pipe3[1], &overallSum, sizeof(overallSum));
close(pipe3[1]);
exit(0);
}
else
{
wait(NULL);
}

close(pipe1[1]);
close(pipe2[1]);
close(pipe3[1]);

int rowSums[rows];
int colSums[cols];
int overallSum;

read(pipe1[0], rowSums, sizeof(rowSums));
read(pipe2[0], colSums, sizeof(colSums));
read(pipe3[0], &overallSum, sizeof(overallSum));

close(pipe1[0]);
close(pipe2[0]);
close(pipe3[0]);

printf("Row sums: ");
for (int i = 0; i < rows; i++)
{
printf("%d ", rowSums[i]);
}
printf("\n");

printf("Column sums: ");
for (int j = 0; j < cols; j++)
{
printf("%d ", colSums[j]);
}
printf("\n");

printf("Overall sum: %d\n", overallSum);

return 0;
}

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