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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* operation.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: charles <charles.cabergs@gmail.com> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/06/17 15:27:22 by charles #+# #+# */
/* Updated: 2020/10/06 15:53:12 by cacharle ### ########.fr */
/* */
/* ************************************************************************** */
#include "eval.h"
int eval_operation(int fds[2], t_env env, t_ast *ast)
{
int status;
int left_fds[2];
int right_fds[2];
left_fds[FD_READ] = fds[FD_READ];
left_fds[FD_WRITE] = FD_NONE;
right_fds[FD_READ] = FD_NONE;
right_fds[FD_WRITE] = fds[FD_WRITE];
if ((status = eval(left_fds, env, ast->op.left, NULL, FD_NONE)) == EVAL_FATAL)
return (EVAL_FATAL);
g_state.last_status = status;
if ((ast->op.sep == TAG_AND && status != 0) ||
(ast->op.sep == TAG_OR && status == 0))
return (status);
return (eval(right_fds, env, ast->op.right, NULL, FD_NONE));
}
/* pid_t run_piped_child(t_env env, t_ast *ast, int copied, int closed) */
/* { */
/* pid_t pid; */
/* int fds[2]; */
/* */
/* pid = fork(); */
/* if (pid == 0) */
/* { */
/* dup2(copied, STDOUT_FILENO); */
/* close(closed); */
/* fds[0] = FD_NONE; */
/* fds[1] = FD_NONE; */
/* exit(eval(fds, env, ast, NULL, FD_NONE)); */
/* } */
/* return (pid); */
/* } */
int eval_pipeline(int fds[2], t_env env, t_ast *ast)
{
t_ftlst *curr;
/* t_ftvec *pids; */
int p[2];
int prev_output;
/* pids = ft_vecnew(16); */
prev_output = STDIN_FILENO;
curr = ast->pipeline;
// create pipe
// fork
// dup2 pipe write -> stdout
// dup2 prev_output -> stdin
while (curr->next != NULL)
{
pipe(p);
int pid = fork();
if (pid == 0)
{
dup2(p[FD_WRITE], STDOUT_FILENO);
if (prev_output != STDIN_FILENO)
dup2(prev_output, STDIN_FILENO);
close(p[FD_READ]);
exit(eval(fds, env, curr->data, NULL, FD_NONE));
}
close(p[FD_WRITE]);
prev_output = p[FD_READ];
curr = curr->next;
}
int pid = fork();
if (pid == 0)
{
/* dup2(p[FD_WRITE], STDOUT_FILENO); */
if (prev_output != STDIN_FILENO)
dup2(prev_output, STDIN_FILENO);
close(p[FD_WRITE]);
exit(eval(fds, env, curr->data, NULL, FD_NONE));
}
while (wait(NULL) != -1)
;
return (0);
}
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