148 lines
4.0 KiB
C
148 lines
4.0 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* shell_loop.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: 2021/11/16 21:22:32 by lperrey ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "minishell.h"
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void close_fd(t_cmd *cmd);
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void execute_cmd(char **envp, t_cmd **cmd_arr, t_all *c);
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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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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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add_history(line_input);
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// Lexing
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c->token_list = input_to_tokens(line_input);
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if (!c->token_list)
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continue ;
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// Parsing
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c->cmd_arr = parsing(c->token_list);
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ft_lstclear((t_list **)&c->token_list, free);
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if (!c->cmd_arr)
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continue ;
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// Exec Pipeline
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exec_cmd_line(c);
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}
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else if (!line_input)
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{
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write(1, "exit\n", 5);
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exit(0);
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}
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}
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}
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// WIP HUGO
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void close_fd(t_cmd *cmd)
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{
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if (cmd->fd_in != 0)
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close(cmd->fd_in);
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if (cmd->fd_out != 1)
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close(cmd->fd_out);
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}
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// WIP HUGO
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void execute_cmd(char **envp, t_cmd **cmd_arr, t_all *c)
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{
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pid_t pid;
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pid_t wpid;
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int wstatus;
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int i;
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int argc;
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// put signal handling for SIGINT to ignore so parent process will not activate signal_handling_executiv while childs are in process
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c->signal_behaviour.sa_handler = SIG_IGN;
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sigaction(SIGINT, &c->signal_behaviour, NULL);
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i = 0;
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while(cmd_arr[i])
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{
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pid = fork();
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if (pid == 0)
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{
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// activate singal handling for execution mode
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c->signal_behaviour.sa_handler = sigint_handler_execution;
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sigaction(SIGINT, &c->signal_behaviour, NULL);
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if (cmd_arr[i]->fd_in != 0)
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dup2(cmd_arr[i]->fd_in, STDIN_FILENO);
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if (cmd_arr[i]->fd_out != 1)
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dup2(cmd_arr[i]->fd_out, STDOUT_FILENO);
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close_fd(cmd_arr[i]);
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if (cmd_arr[i]->builtin_func)
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{
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argc = 0;
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while (cmd_arr[i]->argv[argc])
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argc++;
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cmd_arr[i]->builtin_func(argc, cmd_arr[i]->argv, c);
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exit(0);
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}
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else
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{
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write(1, "1", 1);
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execve(cmd_arr[i]->argv[0], cmd_arr[i]->argv, envp);
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}
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}
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else
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close_fd(cmd_arr[i]);
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i++;
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}
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// waitpid pour la derniere commande (pour '$?')
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wpid = 1;
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while (wpid > 0)
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wpid = wait(&wstatus);
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// to print a \n after execve was terminated by a signal
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if (WIFSIGNALED(wstatus))
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write(1, "\n", 1);
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// put signal handling for sigint back to the signal handler for interactiv mode
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c->signal_behaviour.sa_handler = sigint_handler_interactiv;
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sigaction(SIGINT, &c->signal_behaviour, NULL);
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}
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/* void test_signal(t_all *c)
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{
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// TEMP
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// A faire aprés être sortie du mode interactif
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// - Ignorer tout les signaux
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// - Remettre ori_termios
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c->signal_behaviour.sa_handler = SIG_IGN;
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sigaction(SIGINT, &c->signal_behaviour, NULL);
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sigaction(SIGQUIT, &c->signal_behaviour, NULL);
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tcsetattr(STDIN_FILENO, TCSANOW, &c->ori_termios);
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if (!fork())
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{
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char *arg_test[3];
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arg_test[0] = ft_strdup("sleep");
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arg_test[1] = ft_strdup("3");
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arg_test[2] = NULL;
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sigaction(SIGQUIT, &c->ori_signal_behaviour, NULL);
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sigaction(SIGINT, &c->ori_signal_behaviour, NULL);
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execve("/bin/sleep", arg_test, c->envp);
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}
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else
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{
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int wait_test;
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wait(&wait_test);
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c->signal_behaviour.sa_handler = sigint_handler;
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sigaction(SIGINT, &c->signal_behaviour, NULL);
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c->signal_behaviour.sa_handler = SIG_IGN;
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sigaction(SIGQUIT, &c->signal_behaviour, NULL);
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tcsetattr(STDIN_FILENO, TCSANOW, &c->interactive_termios);
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}
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} */
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