blob: bcf9e689faf0de812760809a7d881f5e4d960b9e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* main.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: cacharle <charles.cabergs@gmail.com> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2019/07/11 18:06:43 by cacharle #+# #+# */
/* Updated: 2019/07/15 13:45:33 by cacharle ### ########.fr */
/* */
/* ************************************************************************** */
#include <unistd.h>
#include <fcntl.h>
#define BUFFER_SIZE 1
#include <stdio.h>
void read_write_file(int fildes)
{
int i;
int writing;
char buf[BUFFER_SIZE];
writing = 1;
while (writing)
{
if (read(fildes, buf, BUFFER_SIZE) == 0)
break;
i = 0;
while (buf[i])
{
write(STDOUT_FILENO, &buf[i], 1);
if (buf[i] == -1)
writing = 0;
i++;
}
}
}
int main(int argc, char **argv)
{
int fildes;
int reading;
if (argc == 1)
{
write(STDERR_FILENO, "File name missing.\n", 20);
return (1);
}
else if (argc > 2)
{
write(STDERR_FILENO, "Too many arguments.\n", 21);
return (1);
}
if ((fildes = open(argv[1], O_RDONLY)) < 0)
{
write(STDERR_FILENO, "Cannot read file.\n", 18);
return (1);
}
read_write_file(fildes);
close(fildes);
return (0);
}
|
