I/O SYSTEM CALL
AIM:
To write a c program using i/o system call to open, read and write a file.
ALGORITHM:
STEP 1: start the program.
STEP 2: include the header file as<fcntl.h> and <sys/stat.h>
STEP 3: create the buffer variable with size of 50.
STEP 4: create a new file using cat and write the data into the file.
STEP 5: open a file in read only mode and read the content of file and place
it in buffer.
STEP 6: write the buffer content to a file which is opened in write
only mode.
STEP 7: close the files.
STEP 8: stop the program.
PROGRAM:
#include<stdio.h>
#include<fcntl.h>
#include<sys/stat.h>
#include<sys/type.h>
int main()
{
int fp1,fp2,n;
char buff[50];
fp1=open("a.txt",O_RDONLY);
fp2=open(“b.txt”,O_CREAT|O_WRONLY|O_TRUNC,S_IRUSR|S_IWUSR);
while(n=read(fp1,buff,50)>0)
write(fp2,&buff,50);
close(fp1);
close(fp2);
exit(0);
}
OUTPUT:
$ cc ios.c
$./a.out
$ cat b.txt
hai
hello
