diff options
| -rw-r--r-- | src/input_handling.c | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/src/input_handling.c b/src/input_handling.c new file mode 100644 index 0000000..f6fa7f8 --- /dev/null +++ b/src/input_handling.c @@ -0,0 +1,117 @@ +/* ************************************************************************** */ +/* */ +/* ::: :::::::: */ +/* 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); +} |