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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_e_externs_pipes.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: rbousset <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/02/14 17:19:27 by rbousset #+# #+# */
/* Updated: 2020/02/14 17:19:29 by rbousset ### ########lyon.fr */
/* */
/* ************************************************************************** */
#include <sys/wait.h>
#include <libft.h>
#include <stdlib.h>
#include <stdint.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include "ft_d_define.h"
#include "ft_e_externs_next.h"
#include "ft_f_fail.h"
#include "ft_m_redirs.h"
#include "ft_s_destroy.h"
#include "ft_s_lcom.h"
#include "ft_s_struct.h"
static void
ft_e_extern_child(const char *fullpath,
t_lcom *ptr,
t_msh *msh)
{
ft_dup_redirs(ptr, msh);
execve(fullpath, ptr->argv, msh->envp);
/* TODO: handle execve failed */
}
static size_t
ft_e_get_pipes_count(struct s_lpipes *ptr)
{
struct s_lpipes *rptr;
size_t pipes;
rptr = ptr;
pipes = 0;
while (rptr->next != NULL)
{
rptr = rptr->next;
pipes++;
}
return (pipes);
}
static void
ft_exec_path(const char *fullpath[],
struct s_lpipes *head,
t_msh *msh)
{
size_t pipes;
size_t i;
size_t j;
int fd[256][2];
int pid;
int status;
pipes = ft_e_get_pipes_count(head);
i = 0;
while (i < pipes)
{
pipe(fd[i]);
i++;
}
i = 0;
while (i <= pipes)
{
if ((pid = fork()) == 0)
{
if (i != 0)
dup2(fd[i - 1][FT_WRITE_END], STDIN_FILENO);
if (i != pipes)
{
dup2(fd[i][FT_READ_END], STDOUT_FILENO);
}
j = 0;
while (j < pipes)
{
close(fd[j][FT_WRITE_END]);
close(fd[j][FT_READ_END]);
j++;
}
ft_e_extern_child(fullpath[i], head->one, msh);
}
head = head->next;
i++;
}
i = 0;
while (i < pipes)
{
close(fd[i][FT_WRITE_END]);
close(fd[i][FT_READ_END]);
i++;
}
/* while (wait(&status) != pid) */
/* ; */
/* msh->ret = WEXITSTATUS(status); */
waitpid(pid, &status, 0);
msh->ret = WEXITSTATUS(status);
}
void
ft_e_externs_pipes(struct s_lpipes *ptr,
t_msh *msh)
{
struct s_lpipes *head;
struct s_lpipes *rptr;
char **envpath;
char **fullpath;
size_t i;
size_t pipes;
head = ptr;
rptr = ptr;
pipes = ft_e_get_pipes_count(head);
if (!(fullpath = (char **)malloc((pipes + 2) * sizeof(char *))))
ft_fail_alloc(msh);
fullpath[pipes + 1] = NULL;
i = 0;
while (rptr != NULL)
{
if (ft_ischarset("/.", rptr->one->com[0]))
{
if (!(fullpath[i] = ft_strdup(rptr->one->com)))
ft_fail_alloc(msh);
}
else if ((envpath = ft_get_env_path(msh)) != NULL)
{
fullpath[i] = ft_search_in_path(rptr->one->com, envpath, msh);
ft_delwords(envpath);
}
/* TODO: deal if not found etc */
i++;
rptr = rptr->next;
}
i = 0;
ft_exec_path((const char**)fullpath, head, msh);
ft_delwords(fullpath);
}
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