MyFileSystem/Mycat at master · KiyaLee/MyFileSystem · GitHub

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 void mycat(void){
     char red_1[10], red_2[10], red_3[10];
     int i = 7, j = 0, k = 7;
     int red = 0;
     int check = 0;
     FILE *f1, *f2, *f3;
     char buf_1[512];
     char buf_2[512];
     char buf_3[512];
     //리다이렉션 체크
   while(1){
        if(typ[j] = '>'){
             red = 1;
             break;
         }
         j++;
     }
     //리다이렉션 있다면 인자가 1개인지 2개인지 체크
     if(red == 1){
         for(k=7; k<j; k++){
             if(typ[k] == '\0')
                 check++;
         }
     }
     if(check == 2)
         red = 2;
      //리다이렉션 없을 때
     if(red == 0){
         for(i=7; i<11; i++){
             red_1[i-7] = typ[i];
         }
         f1 = fopen(red_1, "r");
         while(fgets(buf_1, 512, f1) != NULL)
             printf("%s",buf_1);
         fclose(f1);
      }
    //리다이렉션 인자 1개일때
     if(red == 1){
         for(i=7; i<11; i++){
             red_1[i-7] = typ[i];
         }
         i=0;
         for(i; i<4; i++){
             red_2[i] = typ[j+2];
             j++;
         }
         f1 = fopen(red_1, "r");
         f2 = fopen(red_2, "a");
         fgets(buf_1, 512, f1);
         fputs(buf_1, f2);


         fclose(f1);
         fclose(f2);
     }
     //리다이렉션 인자 2개일때
     if(red == 2 ){
         for(i=7; i<11; i++){
             red_1[i-7] = typ[i];
         }
         int k=7;
         while(typ[k] != '\0')
             k++;
         k++;
         i=0;
         for(k; k<k+4; k++){
             red_2[i] = typ[k];
         }
         i=0;
         for(i; i<4; i++){
             red_3[i] = typ[j+2];
             j++;
         }
         f1 = fopen(red_1, "r");
         f2 = fopen(red_2, "r");
         f3 = fopen(red_3, "a");
         fgets(buf_1, 512, f1);
         fgets(buf_2, 512, f2);
         fputs(buf_1, f3);
         fputs(buf_2, f3);
         fclose(f1);
         fclose(f2);
         fclose(f3);

     }


 }