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Write a C program that makes a copy of a file using standard I/O, and system calls

10th Jul 2018, 2:16 PM
Keerthana Vema
Keerthana Vema - avatar
4 ответов
0
this is not a question this is a statement, is there a question you have?
11th Jul 2018, 12:58 AM
Rtvq
Rtvq - avatar
0
Yeah Beth u should write program that makes a copy of a file using system calls in files
11th Jul 2018, 2:11 AM
Keerthana Vema
Keerthana Vema - avatar
0
Hi Keerthana Vema, That was still not a question. Please be respectful of the intended uses of the Q&A area. https://www.sololearn.com/discuss/1316935/?ref=app
11th Jul 2018, 6:51 AM
Janning⭐
Janning⭐ - avatar
0
#include <stdio.h> #include <unistd.h> #include <fcntl.h> #include <stdlib.h> int main(int argc, char *argv[]) { int f1, f2; char buff[50]; long int n; if(((f1 = open(argv[1], O_RDONLY)) == -1 || ((f2=open(argv[2], O_CREAT | O_WRONLY | O_TRUNC, 0700))== 1))) { perror("problem in file"); exit(1); } while((n=read(f1, buff, 50))>0) if(write(f2, buff, n)!=n) { perror("problem in writing"); exit(3); } if(n==-1) { perror("problem in reading"); exit(2); } close(f2); exit(0); } OUTPUT: Step1: Create an empty file dest.txt Step2: save the program as filecopy.c root@kali:~# gcc filecopy.c root@kali:~# ./a.out filecopy.c dest.txt step5: open the file dest.txt and see if content is copied or not.
3rd Sep 2019, 4:01 AM
Nageswar Nandipati
Nageswar Nandipati - avatar