-
Notifications
You must be signed in to change notification settings - Fork 0
/
pipex.c
74 lines (67 loc) · 2.23 KB
/
pipex.c
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
64
65
66
67
68
69
70
71
72
73
74
/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* pipex.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: mvolkman <mvolkman@student.42heilbronn. +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2024/04/22 10:04:05 by mvolkman #+# #+# */
/* Updated: 2024/04/29 11:51:26 by mvolkman ### ########.fr */
/* */
/* ************************************************************************** */
#include "pipex.h"
void child_process_1(int *pipe_fd, char *src_file, char *cmd1, char **ep)
{
int src_fd;
close(pipe_fd[0]);
src_fd = open(src_file, O_RDONLY);
if (src_fd == -1)
clean_up("Error:", pipe_fd[1], -1);
if (dup2(src_fd, STDIN_FILENO) == -1)
clean_up("dup2 failed", pipe_fd[1], src_fd);
close(src_fd);
if (dup2(pipe_fd[1], STDOUT_FILENO) == -1)
clean_up("dup2 failed", pipe_fd[1], -1);
close(pipe_fd[1]);
run_command(cmd1, ep);
}
void child_process_2(int *pipe_fd, char *dest_file, char *cmd2, char **ep)
{
int dest_fd;
close(pipe_fd[1]);
dest_fd = open(dest_file, O_WRONLY | O_CREAT | O_TRUNC, 0777);
if (dest_fd == -1)
clean_up("Failed to open destination file", pipe_fd[0], -1);
if (dup2(pipe_fd[0], STDIN_FILENO) == -1)
clean_up("dup2 failed", pipe_fd[0], dest_fd);
close(pipe_fd[0]);
if (dup2(dest_fd, STDOUT_FILENO) == -1)
clean_up("dup2 failed", dest_fd, 1);
close(dest_fd);
run_command(cmd2, ep);
}
int main(int ac, char **av, char **ep)
{
int pipe_fd[2];
pid_t pid1;
pid_t pid2;
initial_setup(ac, pipe_fd);
pid1 = fork();
if (pid1 == 0)
{
child_process_1(pipe_fd, av[1], av[2], ep);
exit(EXIT_SUCCESS);
}
if (pid1 > 0)
{
pid2 = fork();
if (pid2 == 0)
{
child_process_2(pipe_fd, av[4], av[3], ep);
exit(EXIT_SUCCESS);
}
}
if (pid1 > 0 && pid2 > 0)
close_and_wait(pipe_fd, pid1, pid2);
return (0);
}