Shell Program for Read & Print the text using shared memory

#include<sys/types.h>

#include<sys/ipc.h>

#include<sys/msg.h>

#include<sys/shm.h>

#include<unistd.h>

#include<stdio.h>

#include<sys/stat.h>

#include<string.h>

main()

{

int shmid,i;

char *pa,a[1000];

shmid=shmget((key_t)1300,1024,0600|IPC_CREAT);

if(shmid==-1)

{printf("shmget failed");

return;

}

pa=(char*)shmat(shmid,0,0);

if(pa==(void *)-1)

{

printf("shmat failed");

return;

}

printf("Enter text&press$to terminate\n");

for(i=0;(a[i]=getchar())!='$';i++);

a[i]='\0';

strcpy(pa,a);

printf("The given text is placed into shared memory\n");

}

OutPut

[user@localhost ~]$ cc mgsh.c

[user@localhost ~]$ ./a.out

Enter text&press$to terminate

Message stored in shared memory

shared memory programs$

The given text is placed into shared memory

[user@localhost ~]$