303 lines
6.7 KiB
C
303 lines
6.7 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* main.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: lperrey <lperrey@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2021/10/04 05:59:26 by lperrey #+# #+# */
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/* Updated: 2021/10/19 21:16:21 by hulamy ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "minishell.h"
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void print_tab(char **array);
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typedef struct s_pipe
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{
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int nb_pipes;
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int **pipes_fd;
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char **input_split;
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} t_pipe;
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typedef struct s_cmd
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{
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char **argv;
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// t_pid pid;
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int pid;
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void *builtin;
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int fd_in;
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int fd_out;
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} t_cmd;
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int count_pipes(char *input)
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{
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int i;
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int nb;
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i = -1;
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nb = 0;
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while (input[++i])
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if (input[i] == '|')
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nb++;
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return (nb);
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}
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int **create_pipes(int nb)
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{
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int **pipes_fd;
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int i;
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if (!nb)
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return (NULL);
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pipes_fd = calloc(nb, sizeof(int *));
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i = 0;
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while(i < nb)
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{
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pipes_fd[i] = calloc(2, sizeof(int));
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pipe(pipes_fd[i]);
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//printf("%i - %i\n", pipes_fd[i][0],pipes_fd[i][1]);
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i++;
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}
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return (pipes_fd);
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}
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char **split_pipes(char *input)
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{
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char **split;
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int i;
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split = ft_split(input, '|');
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i = -1;
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while (split[++i])
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split[i] = ft_strtrim(split[i], " ");
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// print_tab(split);
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return (split);
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}
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t_pipe *fill_pipes(char *input)
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{
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t_pipe *pipes;
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pipes = calloc(1, sizeof(t_pipe));
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pipes->nb_pipes = count_pipes(input);
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pipes->pipes_fd = create_pipes(pipes->nb_pipes);
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pipes->input_split = split_pipes(input);
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return (pipes);
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}
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int redirection(char **input)
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{
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int i;
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i = 0;
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while ((*input)[i] != '\0' && (*input)[i] != '>')
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i++;
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if ((*input)[i] == '>')
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{
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*input = ft_substr(*input, 0, i);
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return (open("file.txt", O_WRONLY | O_TRUNC));
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}
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return (0);
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}
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// pipe[0] read end
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// pipe[1] write end
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void execute_cmd(t_all *c, t_pipe *pipes)
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{
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pid_t pid;
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pid_t wpid;
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int status;
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int i;
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status = 0;
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i = 0;
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while (i <= pipes->nb_pipes)
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{
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pid = fork();
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if (pid == 0) // child
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{
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if (pipes->nb_pipes)
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{
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if (i == 0)
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dup2(pipes->pipes_fd[0][1], STDOUT_FILENO);
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if (i == 1)
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dup2(pipes->pipes_fd[0][0], STDIN_FILENO);
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close(pipes->pipes_fd[0][0]);
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close(pipes->pipes_fd[0][1]);
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}
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if (!ft_strncmp(pipes->input_split[i], "sleep ", 6))
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execve("/bin/sleep", ft_split(pipes->input_split[i], ' '), c->envp);
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if (!ft_strncmp(pipes->input_split[i], "ls ", 3))
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execve("/bin/ls", ft_split(pipes->input_split[i], ' '), c->envp);
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if (!ft_strncmp(pipes->input_split[i], "cat ", 4))
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execve("/bin/cat", ft_split(pipes->input_split[i], ' '), c->envp);
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if (!ft_strncmp(pipes->input_split[i], "wc ", 3))
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execve("/usr/bin/wc", ft_split(pipes->input_split[i], ' '), c->envp);
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if (!ft_strncmp(pipes->input_split[i], "sort ", 5))
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execve("/usr/bin/sort", ft_split(pipes->input_split[i], ' '), c->envp);
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}
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if (pid > 0) // parent
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{
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if (pipes->nb_pipes)
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{
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close(pipes->pipes_fd[0][0]);
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close(pipes->pipes_fd[0][1]);
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}
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}
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i++;
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}
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while ((wpid = wait(&status)) > 0);
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}
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void **cmd_path(char **argv, char **envp)
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{
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int i;
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char **path;
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char *cmd;
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i = 0;
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while (envp[i] && ft_strncmp(envp[i], "PATH=", 5))
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i++;
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path = ft_split(envp[i] + 5, ':'); // 5 = lentgh of "PATH="
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i = -1;
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while (*path && i != 0)
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{
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cmd = ft_strjoin(path[0], "/");
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cmd = ft_strjoin(cmd, argv[0]);
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i = access(cmd, X_OK);
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path++;
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}
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argv[0] = cmd;
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return (NULL);
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}
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int handle_fd(char **input, int i, int fdin, int *fd_in, int *fd_out)
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{
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int *pipes_fd;
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int next_in;
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char *tmp;
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//printf("cmd:%i", i);
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*fd_in = fdin;
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*fd_out = 1;
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next_in = 0;
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if (input[i + 1])
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{
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pipes_fd = calloc(2, sizeof(int));
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pipe(pipes_fd);
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*fd_out = pipes_fd[1];
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next_in = pipes_fd[0];
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//printf(" - pipes:[%i][%i]", pipes_fd[0], pipes_fd[1]);
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}
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tmp = ft_strchr(input[i], '>');
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if (tmp)
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{
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tmp[0] = '\0';
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tmp = ft_strtrim(tmp + 2, " "); // +2 for "> "
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*fd_out = open(tmp, O_WRONLY | O_TRUNC);
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next_in = *fd_out;
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//printf(" - file:[%i]", *fd_out);
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}
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//printf(" - final_fd:[%i][%i]\n", *fd_in, *fd_out);
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return (next_in);
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}
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//t_list *parser(char *input)
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void parser(char *input, char **envp)
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{
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t_list *cmd;
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t_cmd *element;
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char **input_split;
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int i;
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int tmp_fd;
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input_split = ft_split(input, '|');
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tmp_fd = 0;
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i = 0;
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while (input_split[i])
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{
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element = calloc(1, sizeof(t_cmd));
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tmp_fd = handle_fd(input_split, i, tmp_fd, &(element->fd_in), &(element->fd_out));
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element->argv = ft_split(input_split[i], ' ');
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element->builtin = cmd_path(element->argv, envp);
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cmd = ft_lstnew(element);
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i++;
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}
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}
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void shell_loop(t_all *c)
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{
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char *line_input;
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// t_list *cmd;
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// t_pipe *pipes;
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// int nb_pipes;
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// int **pipes_fd;
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// char **split;
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line_input = NULL;
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while (1)
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{
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if (line_input)
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free(line_input);
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line_input = readline(c->prompt);
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if (line_input && *line_input)
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{
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// cmd = parser(line_input);
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parser(line_input, c->envp);
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// exec_cmd(c, cmd);
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// pipes = fill_pipes(line_input);
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// execute_cmd(c, pipes);
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// if (!ft_strncmp(line_input, "env", 4)) // temp placeholder
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// builtin_env(0, NULL, c);
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// else if (!ft_strncmp(line_input, "exit", 5)) // temp placeholder
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// builtin_exit(0, NULL, c);
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// else if (!ft_strncmp(line_input, "pipe ", 5)) // temp temp temp
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// else if (!ft_strncmp(line_input, "pipe ", 5)) // temp temp temp
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// pipes_hugo(line_input, c);
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// else
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// printf("echo: %s\n", line_input);
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}
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}
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}
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void wip_test()
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{
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char term_desc[2048];
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char *term_type;
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int term_width;
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int term_height;
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int ret;
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term_type = getenv("TERM");
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if (term_type == 0)
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ft_putstr_fd("Specify a terminal type with `setenv TERM <yourtype>'.\n", 2);
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ret = tgetent(term_desc, term_type);
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if (ret < 0)
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ft_putstr_fd("Could not access the termcap data base.\n", 2);
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if (ret == 0)
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ft_putstr_fd("Terminal type `%s' is not defined.\n", 2);
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term_height = tgetnum ("li");
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term_width = tgetnum ("co");
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/* Extract information that termcap functions use. */
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/* temp = tgetstr ("pc", BUFFADDR);
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PC = temp ? *temp : 0;
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BC = tgetstr ("le", BUFFADDR);
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UP = tgetstr ("up", BUFFADDR); */
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}
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int main(int argc, char *argv[], char *envp[])
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{
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t_all c;
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(void)argc;
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(void)argv;
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if (!init(&c, envp))
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exit(EXIT_FAILURE);
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shell_loop(&c);
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return (0);
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}
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