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124 lines
3.5 KiB
124 lines
3.5 KiB
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* caller.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: mea <marvin@42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2022/05/03 11:48:16 by narnaud #+# #+# */
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/* Updated: 2022/05/10 09:56:53 by mea ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "minishell.h"
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static void exe(t_datas *datas, t_command *cmd);
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static pid_t caller(t_datas *datas, t_command *cmd);
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int is_builtin(char *cmd)
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{
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int cmd_len;
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cmd_len = ft_strlen(cmd) + 1;
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if (!ft_strncmp(cmd, "echo", ft_min(cmd_len, 5)) \
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|| !ft_strncmp(cmd, "pwd", ft_min(cmd_len, 4)) \
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|| !ft_strncmp(cmd, "cd", ft_min(cmd_len, 3)) \
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|| !ft_strncmp(cmd, "export", ft_min(cmd_len, 7)) \
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|| !ft_strncmp(cmd, "unset", ft_min(cmd_len, 6)) \
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|| !ft_strncmp(cmd, "env", ft_min(cmd_len, 4)) \
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|| !ft_strncmp(cmd, "exit", ft_min(cmd_len, 5)))
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return (1);
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else
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return (0);
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}
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int builtin_call(t_datas *datas, t_command *cmd)
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{
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if (ft_strncmp(cmd->argv[0], "echo", 5) == 0)
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return (ft_echo(cmd));
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else if (ft_strncmp(cmd->argv[0], "pwd", 4) == 0)
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return (ft_pwd(cmd));
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else if (ft_strncmp(cmd->argv[0], "cd", 3) == 0)
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return (ft_cd(cmd));
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else if (ft_strncmp(cmd->argv[0], "export", 7) == 0)
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return (ft_export(datas, cmd));
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else if (ft_strncmp(cmd->argv[0], "unset", 6) == 0)
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return (ft_unset(datas, cmd));
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else if (ft_strncmp(cmd->argv[0], "env", 4) == 0)
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return (ft_env(datas, cmd));
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else if (ft_strncmp(cmd->argv[0], "exit", 5) == 0)
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return (ft_exit(datas, cmd));
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else
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return (-1);
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}
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int piper(t_datas *datas, t_command *cmd)
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{
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int pip[2];
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int status;
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pid_t pid;
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if (cmd->fd[1] == 0 && cmd->next && cmd->next->fd[0] == 0)
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{
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pipe(pip);
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cmd->fd[1] = pip[1];
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cmd->next->fd[0] = pip[0];
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}
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pid = caller(datas, cmd);
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if (cmd->fd[1])
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close(cmd->fd[1]);
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if (cmd->next)
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piper(datas, cmd->next);
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waitpid(pid, &status, 0);
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if (!cmd->next)
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handle_status(datas, status);
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if (cmd->fd[0])
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close(cmd->fd[0]);
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return (1);
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}
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static void exe(t_datas *datas, t_command *cmd)
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{
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char **path_dirs;
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char *path;
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size_t path_length;
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if (ft_strchr(cmd->argv[0], '/'))
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execve(cmd->argv[0], cmd->argv, datas->envp);
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else
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{
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path_dirs = ft_split(getenv("PATH"), ':');
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while (path_dirs)
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{
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path_length = ft_strlen(*path_dirs) + ft_strlen(cmd->argv[0]) + 2;
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path = ft_calloc(path_length, sizeof(char));
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ft_memcpy(path, *path_dirs, ft_strlen(*path_dirs));
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ft_memcpy(path + ft_strlen(*path_dirs), "/", 1);
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ft_memcpy(path + ft_strlen(*path_dirs) + 1, \
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cmd->argv[0], ft_strlen(cmd->argv[0]));
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execve(path, cmd->argv, datas->envp);
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free(path);
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path_dirs++;
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}
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}
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}
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static pid_t caller(t_datas *datas, t_command *cmd)
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{
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pid_t pid;
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pid = fork();
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if (!pid)
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{
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if (builtin_call(datas, cmd) == -1)
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{
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if (cmd->fd[0])
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dup2(cmd->fd[0], STDIN_FILENO);
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if (cmd->fd[1])
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dup2(cmd->fd[1], STDOUT_FILENO);
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exe(datas, cmd);
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}
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exit(EXIT_SUCCESS);
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}
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return (pid);
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}
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