rm alternativ

readme.md

Katta oqimdagi fayllarni tezkor o'chirish dasturi

Unix asosida ishlovchi rm va find -delete funksiyalari kattaroq hajmdagi fayllar sonida muammo chiqarishi ko'pchilik amaliyotida kuzatilgan. Yuqoridagi C kod aynan shu muammoni bartaraf etish va tmp fayllarni kerakli papkalardan tozalash uchun qo'l keladi

Kompiliyatsiya qilish:

gcc -std=c99 -g remover.c -o remover

Test uchun feyk fayllarni generatsiya qilish:

bash fake.sh

Faylni ishga tushirish:

./remover /tmp/fake

fake.sh

#!/bin/bash
for (( i=0; i <= 1000; ++i ))
do
	tmpfile=$(mktemp /tmp/fake/abc-script.XXXXXXXXXXXXXXXXXXXXXXXXXX)
	dd if=/dev/urandom of=$tmpfile bs=1M count=$(expr 1 + $RANDOM % 3)
done

remover.c

#define _DEFAULT_SOURCE
#include <dirent.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <unistd.h>

char *concat(const char *a, const char *b) {
    int lena = strlen(a);
    int lenb = strlen(b);
    char *con = malloc(lena+lenb+1);
    memcpy(con,a,lena);
    memcpy(con+lena,b,lenb+1);        
    return con;
}

int remove_dir_contents(char* path, bool selfd){
  DIR *d;
  struct dirent *dir;
  d = opendir( path );
  
  int x = 0;
  
  if ( d ) {
    while ( ( dir = readdir( d ) ) != NULL) {
      if ( dir->d_name[0] == '.' || dir->d_type == DT_CHR ) {
        continue;
      }else {
        char* fullpath = concat("/", dir->d_name);
        fullpath = concat(path, fullpath);
        if ( dir->d_type == DT_DIR ) {
          x = x + remove_dir_contents( fullpath, true );
          if ( rmdir( fullpath ) != 0){
            printf( "Papkani o'chirishda xatolik:  %s\n", fullpath );
          }else{
            x++;
          }
        }else{
          if ( unlink( fullpath ) != 0){
            printf( "Faylni o'chirishda xatolik:  %s\n", fullpath );
          }else{
            x++;
          }
        }
        free(fullpath);
      }
    }
    closedir(d);
  }
  
  return x;
}

int main(const int argc, char *argv[]) {
    if (argc != 2) {
        fprintf(stderr, "Papka kiritilmadi!\n");
        return -1;
    }
    
    int all_files = remove_dir_contents( argv[1], false );
    printf("O'chirilgan fayllar: %d\n", all_files);
    return(0);
}