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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* input_handling.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: dkaiser <dkaiser@student.42heilbronn.de +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2024/05/02 12:13:23 by dkaiser #+# #+# */
/* Updated: 2024/05/02 15:36:43 by dkaiser ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
#include "pipex.h"
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
static char **get_split_path(char *envp[])
{
char *path;
while (!ft_strnstr(*envp, "PATH=", 5))
envp++;
if (!*envp)
return (NULL);
path = *envp + 5;
return (ft_split(path, ':'));
}
static char *get_pwd(char *envp[])
{
while (!ft_strnstr(*envp, "PWD=", 4))
envp++;
if (!*envp)
return (NULL);
return (*envp + 4);
}
static char *find_in_path(char *cmd, char **path)
{
char *cur_path;
char *cmd_path;
cmd_path = NULL;
while (*path)
{
if (cmd_path)
free(cmd_path);
cur_path = ft_strjoin(*path, "/");
// TODO: Free on fail
cmd_path = ft_strjoin(cur_path, cmd);
free(cur_path);
if (access(cmd_path, X_OK) != -1)
return (cur_path);
path++;
}
return (NULL);
}
static char *get_cmd_path(char *cmd, char **path, char *pwd)
{
char *cur_dir;
if (cmd[0] == '/')
return (cmd); // TODO: Maybe use duplicate instead, so there will be no problem on free()
else if (strchr(cmd, '/'))
{
cur_dir = ft_strjoin(pwd, "/");
// TODO: Free on fail
// TODO: Maybe check if executable, else there might be a problem...
return (ft_strjoin(cur_dir, cmd));
}
else
{
return (find_in_path(cmd, path));
}
}
static char **get_cmds(int argc, char *argv[], char *envp[])
{
char **cmds;
int i;
char **path;
char *pwd;
cmds = malloc(sizeof(char *) * (argc - 2));
if (!cmds)
return (NULL);
path = get_split_path(envp);
// TODO: Free on fail
pwd = get_pwd(envp);
i = 2;
while (i < argc - 1)
{
cmds[i - 2] = get_cmd_path(argv[i], path, pwd);
i++;
}
i = 0;
while (path[i])
free(path[i++]);
free(path);
return (cmds);
}
t_pxdata *get_pxdata(int argc, char *argv[], char *envp[])
{
t_pxdata *result;
result = malloc(sizeof(t_pxdata));
if (!result)
return (NULL); // TODO: Check if an error message needs to be sent
result->in_fd = open(argv[1], O_RDONLY);
result->out_fd = open(argv[--argc], O_WRONLY | O_CREAT | O_TRUNC);
result->cmds = get_cmds(argc, argv, envp);
return (result);
}
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