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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* cmd.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: charles <charles@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/06/14 10:41:31 by charles #+# #+# */
/* Updated: 2020/10/10 12:57:23 by cacharle ### ########.fr */
/* */
/* ************************************************************************** */
#include "eval.h"
pid_t g_child_pid = -1;
/*
** \brief Function wrapped in fork_wrap.
** If it's a builtin, call the coresponding builtin function
** Otherwise call execve
** \param param Parameters of this function
** \return The status of the builtin or the error code of execve
*/
static int st_wrapped_cmd(t_fork_param_cmd *param)
{
int status;
if (param->builtin != NULL)
return (param->builtin->func(param->argv, param->env));
status = execve(param->exec_path, param->argv, (char**)param->env->data);
if (status == -1)
{
if (errno == ENOEXEC)
return (0);
return (errorf_ret(126, "%s: %s\n", param->exec_path, strerror(errno)));
}
return (status);
}
static int st_split_destroy_ret(int ret, char **strs)
{
ft_split_destroy(strs);
return (ret);
}
/*
** \brief Evaluate a command
** \param fds Input/output file descriptor of the command
** \param env Environment
** \param ast Comment AST node
** \return EVAL_FATAL no allocation error,
** the status of the runned command otherwise
*/
int eval_cmd(int fds[2], t_env env, t_ast *ast)
{
t_fork_param_cmd param;
char **argv;
int status;
if ((status = redir_extract(&ast->redirs, env, fds)) != 0)
return (status);
if ((argv = preprocess(&ast->cmd_argv, env)) == NULL)
return (EVAL_FATAL);
if (argv[0] == NULL)
return (st_split_destroy_ret(0, argv));
param.builtin = builtin_search_func(argv[0]);
if (param.builtin != NULL && !param.builtin->forked)
{
status = param.builtin->func(argv, env);
return (st_split_destroy_ret(status, argv));
}
if (param.builtin == NULL
&& (status = path_search(env, argv[0], param.exec_path, true)) != 0)
return (st_split_destroy_ret(status, argv));
param.argv = argv;
param.env = env;
status = fork_wrap(fds, ¶m, (t_wrapped_func)st_wrapped_cmd);
ft_split_destroy(argv);
g_state.last_status = g_state.killed ? g_state.last_status : status;
return (status);
}
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