OS 7

//Lab7.1
#include <stdio.h>
#include <stdlib.h>
#include <dirent.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <string.h>
#include <time.h>
#include <semaphore.h>

#define MAXSTRLENGTH 100

void getFilePath(char *dirPath, char *fileName, char **buf) {
    memset(*buf, 0, MAXSTRLENGTH * sizeof(char));
    strcat(*buf, dirPath);
    if ((*buf)[strlen(*buf) - 1] != '/') {
        (*buf)[strlen(*buf)] = '/';
    }
    strcat(*buf, fileName);
}

void printFileInfo(char *filePath, struct stat fileStat) {
    char fileMode[10] = "----------";
    if (fileStat.st_mode & S_IRUSR) fileMode[1] = 'r';
    if (fileStat.st_mode & S_IWUSR) fileMode[2] = 'w';
    if (fileStat.st_mode & S_IXUSR) fileMode[3] = 'x';
    if (fileStat.st_mode & S_IRGRP) fileMode[4] = 'r';
    if (fileStat.st_mode & S_IWGRP) fileMode[5] = 'w';
    if (fileStat.st_mode & S_IXGRP) fileMode[6] = 'x';
    if (fileStat.st_mode & S_IROTH) fileMode[7] = 'r';
    if (fileStat.st_mode & S_IWOTH) fileMode[8] = 'w';
    if (fileStat.st_mode & S_IXOTH) fileMode[9] = 'x';
    printf("FILE FOUND || File path: %s || Size: %d bytes || Creation date: %.24s || Index descriptor: %d || File permissions: %s\n\n",
    filePath, (int) fileStat.st_size, ctime(&fileStat.st_ctime), (int) fileStat.st_ino, fileMode);
}

void searchFile(char *fileName, char *dirPath, sem_t sem, int pipeFiles[2], int pipeDirs[2]) {
    sem_wait(&sem);
    struct dirent *file;
    struct stat fileStat;
    DIR *dir = opendir(dirPath);
    char *filePath = malloc(MAXSTRLENGTH * sizeof(char));
    int localFileCount = 0, localDirCount = 0;

    while ((file = readdir(dir)) != NULL) {
        getFilePath(dirPath, file->d_name, &filePath);
        stat(filePath, &fileStat);
        if (S_ISREG(fileStat.st_mode)) {
            localFileCount++;
         //   printf("Pid: %d || File path: %s || Size: %d bytes\n\n", getpid(), filePath, (int) fileStat.st_size);
            if (strcmp(file->d_name, fileName) == 0) {
                printFileInfo(filePath, fileStat);
            }
        }
        else if (S_ISDIR(fileStat.st_mode) && strcmp(file->d_name, ".") && strcmp(file->d_name, "..")) {
            localDirCount++;
            pid_t pid = fork();
            if (pid == 0) {
                searchFile(fileName, filePath, sem, pipeFiles, pipeDirs);
                exit(0);
            } else if (pid == -1) {
                printf("Error while creating new process.\n\n");
            }
        }
    }

    int status;
    while (wait(&status) > 0) ;
    printf("Pid: %d || Amount of files opened: %d\n\n", getpid(), localFileCount);
    write(pipeFiles[1], &localFileCount, sizeof(int));
    write(pipeDirs[1], &localDirCount, sizeof(int));
    free(filePath);
    closedir(dir);
    sem_post(&sem);
}

void showTotalCount(int pipeFiles[2], int pipeDirs[2]) {
    int fileCount = 0, dirCount = 1, i = 0;
    close(pipeFiles[1]); close(pipeDirs[1]);
    while (read(pipeFiles[0], &i, sizeof(int))) {
        fileCount += i;
    }
    while (read(pipeDirs[0], &i, sizeof(int))) {
        dirCount += i;
    }
    close(pipeFiles[0]); close(pipeDirs[0]);
    printf("TOTAL FILE COUNT: %d\n TOTAL DIR COUNT: %d\n", fileCount, dirCount);
}

int main(int argc, char *argv[]) {
    if (argc != 4) return -1;
    sem_t sem;
    sem_init(&sem, 1, atoi(argv[3]));
    int pipeFiles[2], pipeDirs[2];
    pipe(pipeFiles); pipe(pipeDirs);
    searchFile(argv[1], argv[2], sem, pipeFiles, pipeDirs);
    sem_destroy(&sem);
    showTotalCount(pipeFiles, pipeDirs);
    return 0;
}


//Lab7.2
#include <stdio.h>
#include <stdlib.h>
#include <dirent.h>
#include <sys/stat.h>
#include <pthread.h>
#include <string.h>
#include <time.h>

#define MAXSTRLENGTH 100

void getFilePath(char *dirPath, char *fileName, char **buf) {
    memset(*buf, 0, MAXSTRLENGTH * sizeof(char));
    strcat(*buf, dirPath);
    if ((*buf)[strlen(*buf) - 1] != '/') {
        (*buf)[strlen(*buf)] = '/';
    }
    strcat(*buf, fileName);
}

void printFileInfo(char *filePath, struct stat fileStat) {
    char fileMode[10] = "----------";
    if (fileStat.st_mode & S_IRUSR) fileMode[1] = 'r';
    if (fileStat.st_mode & S_IWUSR) fileMode[2] = 'w';
    if (fileStat.st_mode & S_IXUSR) fileMode[3] = 'x';
    if (fileStat.st_mode & S_IRGRP) fileMode[4] = 'r';
    if (fileStat.st_mode & S_IWGRP) fileMode[5] = 'w';
    if (fileStat.st_mode & S_IXGRP) fileMode[6] = 'x';
    if (fileStat.st_mode & S_IROTH) fileMode[7] = 'r';
    if (fileStat.st_mode & S_IWOTH) fileMode[8] = 'w';
    if (fileStat.st_mode & S_IXOTH) fileMode[9] = 'x';
    printf("FILE FOUND || File path: %s || Size: %d bytes || Creation date: %.24s || Index descriptor: %d || File permissions: %s\n\n",
    filePath, (int) fileStat.st_size, ctime(&fileStat.st_ctime), (int) fileStat.st_ino, fileMode);
}

int fileCount = 0, dirCount = 1, threadCount = 1;

struct arg {
    char *fileName;
    char *dirPath;
    int maxProc
};

void *searchFile(struct arg *pargs);

void *searchFile(struct arg *pargs) {
    struct arg args = *pargs;
    struct dirent *file;
    struct stat fileStat;
    DIR *dir = opendir(args.dirPath);
    char *filePath = malloc(MAXSTRLENGTH * sizeof(char));
    int localFileCount = 0;
    pthread_t thread;

    while ((file = readdir(dir)) != NULL) {
        getFilePath(args.dirPath, file->d_name, &filePath);
        stat(filePath, &fileStat);
        if (S_ISREG(fileStat.st_mode)) {
            localFileCount++;
         //   printf("Thread: %d || File path: %s || Size: %d bytes\n\n", pthread_self, filePath, (int) fileStat.st_size);
            if (strcmp(file->d_name, args.fileName) == 0) {
                printFileInfo(filePath, fileStat);
            }
        }
        else if (S_ISDIR(fileStat.st_mode) && strcmp(file->d_name, ".") && strcmp(file->d_name, "..")) {
            dirCount++;
            while (threadCount >= args.maxProc) {
                sleep(10);
            }
            struct arg newargs;
            newargs.dirPath = malloc(MAXSTRLENGTH * sizeof(char));
            strcpy(newargs.dirPath, filePath);
            newargs.fileName = args.fileName;
            newargs.maxProc = args.maxProc;
            pthread_create(&(thread), NULL, searchFile, &newargs);
            threadCount++;
            pthread_join(thread, NULL);
            threadCount--;
            free(newargs.dirPath);
        }
    }
    printf("Thread: %lu || Amount of files opened: %d\n\n", pthread_self(), localFileCount);
    fileCount += localFileCount;
    free(filePath);
    closedir(dir);
}

int main(int argc, char *argv[]) {
    if (argc != 4) return -1;
    struct arg args = {argv[1], argv[2], atoi(argv[3])};
    searchFile(&args);
    printf("TOTAL FILE COUNT: %d\n TOTAL DIR COUNT: %d\n", fileCount, dirCount);
    return 0;
}