int pat_info() {
FILE *fp;
fp = fopen("patient.txt", "rb+");
if(fp == NULL) {
perror(" file cannot be accessed:");
return errno;
}
int op, n;
char err[32];
while(1) {
printpatmenu();
b:printf("\n\n\n\tEnter the option number:");
n = scanf("%d", &op);
if(n == 0) {
op = 7;
readline(err, 32);
}
switch(op) {
case 1:system("clear");
printheader();
new_pat(fp);
break;
case 2:system("clear");
printheader();
edit_pat(fp);
break;
case 3:system("clear");
printheader();
search_pat(fp);
break;
case 4:system("clear");
printheader();
list_pat(fp);
break;
case 5:system("clear");
printheader();
close_pat(fp);
break;
case 6:system("clear");
fclose(fp);
printheader();
printmainmenu();
break;
default:printf("\n\n\t***Invalid entry***");
goto b;
break;
}
}
return 0;
}
/*
function to handle files string operation
*/
int strops_files(void *arg){
int rc = 0;
struct strops_args *ptr = (struct strops_args *)arg;
struct strops_args *kptr = NULL;
/*check validation of input */
rc = isInputValid(ptr);
if(rc < 0)
goto out;
/*copy_from_user into kernel */
kptr = (struct strops_args *)kmalloc(sizeof(struct strops_args), GFP_KERNEL);
if(IS_ERR(kptr)){
rc = -ENOMEM;
goto out;
}
if(copy_from_user(kptr, ptr, sizeof(struct strops_args))){
rc = -EFAULT;
goto free_kptr;
}
/* begin file strings operation mode*/
rc = search_pat(kptr);
if(rc < 0)
goto free_kptr;
if(kptr->flag == 1 || kptr->flag == 2){
if(kptr->res_len == 0){
printk("No found pattern; Operation quit.\n");
goto free_kptr;
}
rc = write_pat(kptr, 0);
if(rc < 0)
goto free_kptr;
}
if(copy_to_user(ptr, kptr, sizeof(struct strops_args))){
rc = -EFAULT;
goto free_kptr;
}
free_kptr:
kfree(kptr);
out:
return rc;
}
