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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* cmd.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: charles <charles.cabergs@gmail.com> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/06/14 10:41:31 by charles #+# #+# */
/* Updated: 2020/06/14 12:52:59 by charles ### ########.fr */
/* */
/* ************************************************************************** */
#include "eval.h"
/*
** \brief Wrap a function in a fork
** \param fd_in fork input file descriptor
** \param fd_out fork output file descriptor
** \param passed param of the wrapped function
** \param wrapped function to wrap
*/
int fork_wrap(
int fd_in,
int fd_out,
void *passed,
int (*wrapped)(void *param))
{
int status;
pid_t child_pid;
if ((child_pid = fork()) == -1)
return (-1);
if (child_pid == 0)
{
if (dup2(STDIN_FILENO, fd_in) == -1 ||
dup2(STDOUT_FILENO, fd_out) == -1)
exit(EXIT_FAILURE);
if ((status = wrapped(passed)) == -1)
exit(EXIT_FAILURE);
exit(status);
}
wait(&child_pid);
return (WEXITSTATUS(child_pid));
}
/*
** \brief execve syscall wrapper passed it to fork_wrap
** \param param function params
** \return execve return value
*/
int forked_cmd(void *void_param)
{
t_fork_param_cmd *param;
param = void_param;
if (param->builtin != NULL)
return (param->builtin(param->argv, param->env));
else
return (execve(param->exec_path, param->argv, (char**)param->env->data));
}
int eval_cmd(t_env env, t_path path, t_ast *ast)
{
t_fork_param_cmd param;
// check in and out (single string)
// argv[0]: [string]: ambiguous redirect code 1
// check in and out (exist)
// argv[0]: [string]: No such file or directory (probably from errno)
return (0);
/* if (in != NULL) */
/* { */
/* char **redir_in = preprocess(in); */
/* if (redir_in[1] != NULL) */
/* ambiguous; */
/* if ((fd_in = open(cmd->in, O_RDONLY)) == -1) */
/* file error; */
/* } */
/* */
/* if (out != NULL) */
/* { */
/* char **redir_out = preprocess(out); */
/* if (redir_out[1] != NULL) */
/* ambiguous; */
/* if ((fd_out = open(cmd->out, (is_append ? O_APPEND : O_WRONLY) | O_CREAT)) == -1) */
/* file error; */
/* } */
/* */
/* char **argv = preprocess(cmd_argv); */
/* */
/* param.builtin = builtin_search_func(argv[0]); */
/* if (param.builtin) */
/* param.exec_path = exec_search_path(path, env_search(env, "PATH"), argv[0]); */
/* */
/* // get cmd path */
/* // argv[0]: [string]: command not found code 127 */
/* if (param.exec_path == NULL) */
/* not_found; */
/* */
/* param.argv = argv; */
/* param.env = env; */
/* return (fork_wrap(fd_in, fd_out, ¶m, &execve_wrapper)); */
}
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