111 lines
3.1 KiB
C
111 lines
3.1 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* execution.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: apommier <apommier@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2022/04/20 04:43:32 by apommier #+# #+# */
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/* Updated: 2022/04/22 11:51:32 by apommier ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "../../includes/minishell.h"
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void exec_cmd(t_cmd *cmd, char **env, int *fdpipe)
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{
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cmd->current_s_cmd->child = fork();
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if (cmd->current_s_cmd->child == 0)
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{
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if (fdpipe)
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close(fdpipe[0]);
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dup2(cmd->current_s_cmd->fd[0], 0);
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dup2(cmd->current_s_cmd->fd[1], 1);
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close(cmd->current_s_cmd->fd[0]);
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close(cmd->current_s_cmd->fd[1]);
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if (is_builtin(cmd->current_s_cmd->cmd))
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{
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call_builtin(cmd);
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exit(0);
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}
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check_access(cmd);
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if (-1 == execve(cmd->current_s_cmd->cmd,
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cmd->current_s_cmd->args, env))
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ft_putstr_fd("Minishell: exec error\n", 2);
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exit(126);
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}
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else if (!cmd->current_s_cmd->cmd || access(cmd->current_s_cmd->cmd, F_OK))
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cmd->err_var = 127;
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else
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cmd->err_var = 131;
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}
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void exec_last_cmd(t_cmd *cmd, int *fdin, int *fdout, int i)
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{
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if (cmd->current_s_cmd->outfile)
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*fdout = open(cmd->current_s_cmd->outfile,
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O_RDWR | O_CREAT | O_APPEND, 0666);
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else
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*fdout = dup(cmd->tmpout);
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cmd->current_s_cmd->fd[0] = *fdin;
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cmd->current_s_cmd->fd[1] = *fdout;
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if (i == 0 && is_builtin(cmd->current_s_cmd->cmd))
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call_builtin(cmd);
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else
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exec_cmd(cmd, cmd->env, 0);
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}
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void exec_not_last_cmd(t_cmd *cmd, int *fdpipe, int *fdin, int *fdout)
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{
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pipe(fdpipe);
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cmd->current_s_cmd->fd[0] = *fdin;
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if (cmd->current_s_cmd->outfile)
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{
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*fdout = open(cmd->current_s_cmd->outfile,
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O_RDWR | O_CREAT | O_APPEND, 0666);
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cmd->current_s_cmd->fd[1] = *fdout;
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}
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else
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cmd->current_s_cmd->fd[1] = fdpipe[1];
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*fdin = fdpipe[0];
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exec_cmd(cmd, cmd->env, fdpipe);
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close(cmd->current_s_cmd->fd[0]);
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}
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void set_fdin_not_first(t_cmd *cmd, int *fdin)
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{
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close(*fdin);
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*fdin = open(cmd->current_s_cmd->infile, O_RDWR);
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if (*fdin < 0)
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printf("Minishell: open : bad file descriptor\n");
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}
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void execute(t_cmd *cmd)
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{
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int fdpipe[2];
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int fdout;
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int fdin;
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int i;
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i = 0;
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fdpipe[1] = -1;
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cmd->tmpin = dup(0);
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cmd->tmpout = dup(1);
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set_fdin(cmd, &fdin);
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while (cmd->current_s_cmd)
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{
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cmd->current_s_cmd->child = 1;
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fdout = -1;
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if (i > 0 && cmd->current_s_cmd->infile)
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set_fdin_not_first(cmd, &fdin);
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if (i == cmd->nb_s_cmd - 1)
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exec_last_cmd(cmd, &fdin, &fdout, i);
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else
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exec_not_last_cmd(cmd, fdpipe, &fdin, &fdout);
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if (fdpipe[1] != -1)
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close(fdpipe[1]);
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cmd->current_s_cmd = cmd->s_cmds[++i];
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}
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reset_fds(cmd);
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}
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