files.c

#include "files.h"

//https://stackoverflow.com/questions/2180079/how-can-i-copy-a-file-on-unix-using-c
int cp(const char *to, const char *from)
{
    int fd_to, fd_from;
    char buf[4096];
    ssize_t nread;
    int saved_errno;

    fd_from = open(from, O_RDONLY);
    if (fd_from < 0)
        return -1;

    fd_to = open(to, O_WRONLY | O_CREAT | O_EXCL, 0666);
    if (fd_to < 0)
        goto out_error;

    while (nread = read(fd_from, buf, sizeof buf), nread > 0){
        char *out_ptr = buf;
        ssize_t nwritten;

        do{
            nwritten = write(fd_to, out_ptr, nread);
            if (nwritten >= 0){
                nread -= nwritten;
                out_ptr += nwritten;
            }else if (errno != EINTR){
                goto out_error;
            }
        }while(nread > 0);
    }

    if (nread == 0){
        if (close(fd_to) < 0){
            fd_to = -1;
            goto out_error;
        }
        close(fd_from);

        /* Success! */
        return 0;
    }

    out_error:
    saved_errno = errno;

    close(fd_from);
    if (fd_to >= 0)
        close(fd_to);

    errno = saved_errno;
    return -1;
}

int checkWordInFile(FILE* file, char* str){
    const int tempSize = 1024;
    char temp[tempSize];
    rewind(file);
    while(fgets(temp, tempSize, file) != NULL) {
        if((strstr(temp, str)) != NULL) {
            return RESULT_FAILURE;
        }
    }
    return RESULT_SUCCESS;
}

void readFileLine(char* filename, int lineNumber, char* buffer){

    FILE* file;
    file = fopen(filename, "rb");

    const int tempSize = 1024;
    char temp[tempSize];

    if (file == NULL) {
        return;
    } else {
        int i=0;
        while(fgets(temp, tempSize, file) != NULL) {
            if(i==lineNumber){
                strcpy(buffer, temp);
                break;
            }
            i++;
        }
        fclose(file);
    }
}

int getLastModification(char* path, time_t* lastModification){

    int file=0;
    if((file=open(path,O_RDONLY)) < -1)
        return 1;

    struct stat fileStat;
    if(fstat(file,&fileStat) < 0)
        return 1;

    *lastModification = fileStat.st_mtime;
    return 0;

}