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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* interpreter.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: chuhlig <chuhlig@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2024/12/17 19:15:49 by chuhlig #+# #+# */
/* Updated: 2025/01/14 19:52:27 by chuhlig ### ########.fr */
/* */
/* ************************************************************************** */
#include "debug_tools.h"
#include "minishell.h"
int handle_redirections(t_redirection *redirs)
{
int fd;
if (redirs[0].type == INPUT_FILE)
{
fd = open(redirs[0].specifier, O_RDONLY);
if (fd < 0)
{
perror("open");
return (-1);
}
dup2(fd, STDIN_FILENO);
close(fd);
}
else if (redirs[0].type == INPUT_LIMITER)
{
fd = open("/tmp/heredoc_tmp", O_WRONLY | O_CREAT | O_TRUNC, 0644);
if (fd < 0)
{
perror("open");
return (-1);
}
write(fd, redirs[0].specifier, ft_strlen(redirs[0].specifier));
close(fd);
fd = open("/tmp/heredoc_tmp", O_RDONLY);
if (fd < 0)
{
perror("open");
return (-1);
}
dup2(fd, STDIN_FILENO);
close(fd);
}
if (redirs[1].type == OUTPUT_OVERRIDE)
{
fd = open(redirs[1].specifier, O_WRONLY | O_CREAT | O_TRUNC, 0644);
if (fd < 0)
{
perror("open");
return (-1);
}
dup2(fd, STDOUT_FILENO);
close(fd);
}
else if (redirs[1].type == OUTPUT_APPEND)
{
fd = open(redirs[1].specifier, O_WRONLY | O_CREAT | O_APPEND, 0644);
if (fd < 0)
{
perror("open");
return (-1);
}
dup2(fd, STDOUT_FILENO);
close(fd);
}
return (0);
}
int eval_rec(t_node *node, t_env **env, int in_fd)
{
pid_t pid;
int p[2];
int result;
int status;
int original_stdin;
if (node->type == PIPE_NODE)
{
pipe(p);
pid = fork();
if (pid == 0)
{
close(p[0]);
dup2(in_fd, STDIN_FILENO);
dup2(p[1], STDOUT_FILENO);
result = eval_rec(node->content.pipe.left, env, in_fd);
exit(result);
}
else
{
close(p[1]);
original_stdin = dup(STDIN_FILENO);
dup2(p[0], STDIN_FILENO);
result = eval_rec(node->content.pipe.right, env, p[0]);
waitpid(pid, &status, 0);
dup2(original_stdin, STDIN_FILENO);
close(original_stdin);
}
}
else if (node->type == CMD_NODE)
result = execute_cmd(&node->content.cmd, env);
else
result = EXIT_FAILURE;
return (result);
}
int eval(t_node *node, t_env **env)
{
return (eval_rec(node, env, STDIN_FILENO));
}
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