Extract text From Shared Memory & Print it in Uppercase

PROGRAM: 

#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;

}

for(i=0;pa[i]!='\0';i++)

{

if(pa[i]>='a'&&pa[i]<='z')

pa[i]=pa[i]-32;

else

continue;

}

printf("\nUppercase Message : %s",pa);

}

OUTPUT:

[user @localhost ~]$ cc umgsh.c

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

Uppercase Message : MESSAGE STORED IN SHARED MEMORY

SHARED MEMORY PROGRAMS

[user @localhost ~]$