Rewrite the following C program using only system calls such as open, close, read, write, clear, loctl, etc. Don't use calls from C or C++ libraries uncluding cout, cin, printf, scanf, etc. // Filename: cpfile.c// Compile command: gcc cpfile.c -o cpfile.exe#include #include #include #define SIZ 128L// Copy from source file to target file. Adapted from The C Programming Language// by Kernighan and Ritchie.int main(int argc, const char *argv[]) {int f1, f2;// Do we have right number of arguments?if (argc != 3){printf("Wrong number of command line arguments\n");// exit(1);return 1;}// Can we access thge source file?if ((f1 = open(argv[1], O_RDONLY, 0))printf("Can't open %s \n", argv[1]);return 2;-1){==// Can we create the target file?if ((f2 = creat(argv[2], 0644)) == -1){printf("Can't create %s \n", argv[2]);return 3;}// Copy source file contents to target file.char buf[SIZ];int n;while ((n = read( f1, buf, SIZ)) > 0)if (write(f2, buf, n) != n){printf("Can't write file" );close(f1);close(f2);return 4;

Answered: // Filename: cpfile.c // Compile…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

Rewrite the following C program using only system calls such as open, close, read, write, clear, loctl, etc. Don't use calls from C or C++ libraries uncluding cout, cin, printf, scanf, etc.

// Filename: cpfile.c
// Compile command: gcc cpfile.c -o cpfile.exe
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#define SIZ 128L
// Copy from source file to target file. Adapted from The C Programming Language
// by Kernighan and Ritchie.
int main(int argc, const char *argv[]) {
int f1, f2;
// Do we have right number of arguments?
if (argc != 3){
printf("Wrong number of command line arguments\n");
// exit(1);
return 1;
}
// Can we access thge source file?
if ((f1 = open(argv[1], O_RDONLY, 0))
printf("Can't open %s \n", argv[1]);
return 2;
-1){
==
// Can we create the target file?
if ((f2 = creat(argv[2], 0644)) == -1){
printf("Can't create %s \n", argv[2]);
return 3;
}
// Copy source file contents to target file.
char buf[SIZ];
int n;
while ((n = read( f1, buf, SIZ)) > 0)
if (write(f2, buf, n) != n)
{
printf("Can't write file" );
close(f1);
close(f2);
return 4;

Expert Solution

Step 1

Given C Program

#include<stdio.h>
#include<string.h>
#include<unistd.h>
#include<fcntl.h>
#define SIZ 128
int main (int argc,const char * argv[])
{
int f1,f2;
if(argc!=3)
{
printf("Wrong number of command line arguments\n");
// exit(1);
return 1;
}
if((f1=open(argv[1],O_RDONLY,0))==-1)
{
printf("Cant open %s\n",argv[1]);
return 2;
}
if((f2=creat(argv[2],0644))==-1)
{
printf("Cant create %s\n",argv[2]);
return 3;
}
char buf[SIZ];
int n;
while((n=read(f1,buf,SIZ))>0)
if(write(f2,buf,n)!=n)
{
printf("cant write file");
close(f1);
close(f2);
return 4;
}

}

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