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update: pushing the final version of pipex

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Raphaël 2024-10-30 12:47:31 +01:00 • committed by GitHub
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_exec.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: rparodi <rparodi@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2024/03/15 14:23:10 by rparodi #+# #+# */
/* Updated: 2024/04/24 09:17:46 by rparodi ### ########.fr */
/* */
/* ************************************************************************** */
#include "../includes/pipex.h"
void ft_close(t_utils *utils, int *fd)
{
if (utils->fd_output > 2)
close(utils->fd_output);
if (utils->fd_input > 2)
close(utils->fd_input);
if (fd[0] > 2)
close(fd[0]);
if (fd[1] > 2)
close(fd[1]);
}
int ft_open_fds(t_utils *utils, int *fd, int cmd_count)
{
if (cmd_count == 1)
{
close(fd[0]);
close(utils->fd_output);
dup2(utils->fd_input, 0);
close(utils->fd_input);
dup2(fd[1], 1);
close(fd[1]);
}
else if (cmd_count == 2)
{
close(fd[1]);
close(utils->fd_input);
dup2(fd[0], 0);
close(fd[0]);
dup2(utils->fd_output, 1);
close(utils->fd_output);
}
else
{
close(fd[0]);
close(fd[1]);
}
return (cmd_count);
}
void ft_wait(pid_t pid1, pid_t pid2, t_utils *utils, int *fd)
{
if (pid1 != 0 || pid2 != 0)
ft_open_fds(utils, fd, 0);
waitpid(pid1, NULL, 0);
waitpid(pid2, NULL, 0);
}
void ft_pipex(t_utils *utils)
{
int fd[2];
pid_t pid1;
pid_t pid2;
pipe(fd);
pid1 = fork();
if (pid1 == -1)
ft_exit(utils, NULL, 1, "Fork failed!\n");
if (pid1 == 0)
{
ft_open_fds(utils, fd, 1);
ft_exec_cmd(utils, utils->check_first_cmd, utils->first_cmd_args);
ft_close(utils, fd);
}
pid2 = fork();
if (pid2 == -1)
ft_exit(utils, NULL, 1, "Fork failed!\n");
if (pid2 == 0)
{
ft_open_fds(utils, fd, 2);
ft_exec_cmd(utils, utils->check_second_cmd, utils->second_cmd_args);
ft_close(utils, fd);
}
ft_wait(pid1, pid2, utils, fd);
}
void ft_exec_cmd(t_utils *utils, char *cmd, char *cmd_args)
{
const char **args = (const char **)ft_split(cmd_args, ' ');
if (execve(cmd, (char *const *)args, (char *const *)utils->envp) == -1)
{
ft_free_strs((char **)args);
ft_exit(utils, NULL, 1, "Execution of the command failed!\n");
}
}