1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
|
/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* cmd.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: charles <charles.cabergs@gmail.com> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/06/14 10:41:31 by charles #+# #+# */
/* Updated: 2020/06/15 11:09:38 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 ((fd_in != MS_NO_FD && dup2(fd_in, STDIN_FILENO) == -1) ||
(fd_out != MS_NO_FD && dup2(fd_out, STDOUT_FILENO) == -1))
exit(EXIT_FAILURE);
if ((status = wrapped(passed)) == -1)
exit(EXIT_FAILURE);
exit(status);
}
wait(&child_pid);
return (WEXITSTATUS(child_pid));
}
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;
int fd_in;
int fd_out;
char **argv;
fd_in = MS_NO_FD;
fd_out = MS_NO_FD;
if (!redir_extract(ast->redirs, env, &fd_in, &fd_out))
{
ast->redirs = NULL;
return (-1);
}
ast->redirs = NULL;
if ((argv = preprocess(&ast->cmd_argv, env)) == NULL)
{
ast->cmd_argv = NULL;
return (-1);
}
param.builtin = builtin_search_func(argv[0]);
if (param.builtin == NULL)
{
param.exec_path = exec_search_path(path, env_search(env, "PATH"), argv[0]);
if (param.exec_path == NULL)
{
error_eval_put(ERROR_CMD_NOT_FOUND, argv[0]);
ft_split_destroy(argv);
return (-1); // return error status
}
}
param.argv = argv;
param.env = env;
int ret = fork_wrap(fd_in, fd_out, ¶m, &forked_cmd);
ft_split_destroy(argv);
return (ret);
}
|
