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pipex.c
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pipex.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* pipex.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: mac <mac@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2022/01/07 19:34:07 by mac #+# #+# */
/* Updated: 2022/02/21 18:19:20 by mac ### ########.fr */
/* */
/* ************************************************************************** */
#include "pipex.h"
void error(void)
{
perror("Error");
exit(EXIT_FAILURE);
}
void child_process(char **argv, char **env, int *fd)
{
int input;
char **cmd;
input = open(argv[1], O_RDONLY);
if (input < 0)
error();
dup2(fd[1], STDOUT_FILENO);
if (dup2(input, STDIN_FILENO) < 0)
error();
close(fd[0]);
close(fd[1]);
close(input);
cmd = ft_split(argv[2], ' ');
execve(path_checker(cmd[0], env), cmd, NULL);
}
void child2_process(char **argv, char **env, int *fd)
{
int output;
char **cmd;
output = open(argv[4], O_CREAT | O_RDWR | O_TRUNC, 0644);
if (output < 0)
error();
dup2(fd[0], STDIN_FILENO);
dup2(output, STDOUT_FILENO);
close(fd[0]);
close(fd[1]);
close(output);
cmd = ft_split(argv[3], ' ');
execve(path_checker(cmd[0], env), cmd, NULL);
}
int main(int argc, char **argv, char **env)
{
int fd[2];
pid_t pid;
pid_t pid2;
if (argc == 5)
{
pipe(fd);
pid = fork();
if (pid < 0)
error();
if (pid == 0)
child_process(argv, env, fd);
pid2 = fork();
if (pid2 < 0)
error();
if (pid2 == 0)
child2_process(argv, env, fd);
close(fd[0]);
close(fd[1]);
waitpid(pid, NULL, 0);
waitpid(pid2, NULL, 0);
}
else
error();
}