Ras malai cake

 Rasmalai cakes

 

 

 

 slip 1 a

/Program to create hole in file
#include<stdio.h>
#include<fcntl.h>
#include"string.h"



int main()
{
    
    //create a new file by named as file.txt

    int n=creat("file.txt","w");
    char ch[16]="hello world how are";
    char str[20]="od -c file.txt";
   //change permission of file.txt with maximum access

    system("chmod 777 file.txt");

   //write "helloworld string in file.txt      

   write(n,ch,16);

   // to move cursor from begging to 48th position  

    lseek(n,48,SEEK_SET);
  //write "helloworld string in file.txt      

  write(n,ch,16);
    // to prompt command in command prompt
    system(str);
    return(0);
}

slip 2b

/To handle the two-way communication between parent and child using pipe.

#include<stdio.h>
#include<unistd.h>

int main()
{
   int pipefds1[2], pipefds2[2];
   int returnstatus1, returnstatus2;
   int pid;
   char pipe1writemessage[20] = "Hi";
   char pipe2writemessage[20] = "Hello";
   char readmessage[20];
   returnstatus1 = pipe(pipefds1);
   
   if (returnstatus1 == -1) {
      printf("Unable to create pipe 1 \n");
      return 1;
   }
   returnstatus2 = pipe(pipefds2);
   
   if (returnstatus2 == -1) {
      printf("Unable to create pipe 2 \n");
      return 1;
   }
   pid = fork();
   
   if (pid != 0) // Parent process {
      close(pipefds1[0]); // Close the unwanted pipe1 read side
      close(pipefds2[1]); // Close the unwanted pipe2 write side
      printf("In Parent: Writing to pipe 1 – Message is %s\n", pipe1writemessage);
      write(pipefds1[1], pipe1writemessage, sizeof(pipe1writemessage));
      read(pipefds2[0], readmessage, sizeof(readmessage));
      printf("In Parent: Reading from pipe 2 – Message is %s\n", readmessage);
   } else { //child process
      close(pipefds1[1]); // Close the unwanted pipe1 write side
      close(pipefds2[0]); // Close the unwanted pipe2 read side
      read(pipefds1[0], readmessage, sizeof(readmessage));
      printf("In Child: Reading from pipe 1 – Message is %s\n", readmessage);
      printf("In Child: Writing to pipe 2 – Message is %s\n", pipe2writemessage);
      write(pipefds2[1], pipe2writemessage, sizeof(pipe2writemessage));
   }
   return 0;
}

slip 3 q2#include<stdio.h>
#include<sys/types.h>
#include<dirent.h>
#include<sys/stat.h>
int main(int argc,char *argv[])
{
    int i;
    struct stat st;
    for(i=0;i<argc;i++)
    {
        stat(argv[i],&st);
        if(S_ISDIR(st.st_mode))
            printf("\n type of the file %s is directory",argv[i]);
        else if(S_ISREG(st.st_mode))
            printf("\n type of the file is %s regular file",argv[i]);
        else
            printf(" other than directory or regular file");
    }
    return 0;
}

 

slip 6and 3 q1

/atexit()
#include <stdio.h>
#include <stdlib.h>

void functionA ()
{
   printf("This is functionA\n");
}

int main ()
 {
   /* register the termination function */
   atexit(functionA );
   
   printf("Starting  main program...\n");

   printf("Exiting main program...\n");

   return(0);
}

slip 5 q1

#include<stdio.h>
#include<sys/stat.h>
#include<string.h>
int main()
{
    char fname[20];
    struct stat buff;
    printf("\n enter file to check size");
    scanf("%s",fname);
    stat(fname,&buff);
    printf("\nsize of %s file is %ld byte",fname,buff.st_size);
    return 0;
}

 

slip 6 q2

include<stdio.h>
#include<dirent.h>
#include<unistd.h>
int main()
{
    DIR *dp;
    int cnt=0;
    dp=opendir(".");
    struct dirent *dent;
    while((dent=readdir(dp))!=NULL)
    {
    printf("\nfile=%s",dent->d_name);
    cnt++;
    }
    printf("\n total number files is %d",cnt);
}

slip 1 q 2

#include<stdio.h>
#include<sys/stat.h>
int main(int argc,char *argv[])
{
    struct stat buff;
    for(int i=1;i<argc;i++)
    {
        stat(argv[i],&buff);
        printf("\n file=%s inode=%ld",argv[i],buff.st_ino);
    }

}