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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* e_externs.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 <string.h>
#include <fcntl.h>
#include <unistd.h>
#ifdef __linux__
# include <linux/limits.h>
#else
# include <limits.h>
#endif
#include <errno.h>
#include "b_export_next.h"
#include "d_define.h"
#include "f_fail.h"
#include "e_redirs.h"
#include "e_unshebanged.h"
#include "s_com.h"
#include "s_destroy.h"
#include "s_line.h"
#include "s_struct.h"
#include "u_path.h"
#include "u_utils.h"
static void e_extern_child(const char fullpath[], t_com *ptr, t_msh *msh)
{
char buff[7];
int fd;
if ((fd = open(fullpath, O_RDONLY)) != -1)
{
if (read(fd, buff, 7) != -1)
if (ft_strncmp(buff, "\177ELF\002\001\001", 7) != 0
&& ft_strncmp(buff, "#!", 2) != 0)
{
close(fd);
e_extern_read_script(fullpath, ptr, msh, FALSE);
return ;
}
close(fd);
}
if (execve(fullpath, ptr->argv, msh->envp) == -1)
{
f_exec(fullpath, ptr->bin);
u_eof_fd(msh->fd);
s_com_destroy(&msh->com);
s_line_clear(&msh->curr);
s_destroy(msh);
exit(errno);
}
}
static void e_export_env_fork(t_com *ptr, t_msh *msh)
{
char **re_ptr;
re_ptr = ptr->env_fork;
while (*re_ptr != NULL)
{
b_export_with_equals(*re_ptr, msh);
re_ptr++;
}
}
static void e_fullpath_not_found(t_com *ptr, t_msh *msh)
{
f_command_not_found(ptr->bin);
u_eof_fd(msh->fd);
s_com_destroy(&msh->com);
s_line_clear(&msh->curr);
s_destroy(msh);
exit(127);
}
/*
** TODO: handle fork failed
*/
static void e_exec_path(const char fullpath[],
t_com *ptr,
unsigned char fp_ret,
t_msh *msh)
{
pid_t pid;
int status;
if ((pid = fork()) == 0)
{
if (ptr->env_fork != NULL)
e_export_env_fork(ptr, msh);
e_dup_redirs(ptr, msh);
if (fp_ret == 2)
e_fullpath_not_found(ptr, msh);
e_extern_child(fullpath, ptr, msh);
}
else if (pid < 0)
{
}
else
{
while (wait(&status) != pid)
;
msh->ret = (msh->sig != 0) ? msh->sig : WEXITSTATUS(status);
}
}
void e_extern(t_com *ptr, t_msh *msh)
{
char fullpath[PATH_MAX];
unsigned char fp_ret;
fullpath[0] = C_NUL;
if (ptr->bin != NULL && (ft_ischarset("./", ptr->bin[0]) == TRUE
|| ft_strchr(ptr->bin, '/') != NULL))
{
ft_strlcpy(fullpath, ptr->bin, PATH_MAX);
e_exec_path(fullpath, ptr, 0, msh);
return ;
}
else
{
fp_ret = u_search_in_path(fullpath, ptr->bin, PATH_MAX, msh);
e_exec_path(fullpath, ptr, fp_ret, msh);
}
}
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