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
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* 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 "d_define.h"
#include "e_externs_next.h"
#include "f_fail.h"
#include "m_redirs.h"
#include "s_destroy.h"
#include "s_line.h"
#include "s_lpipes.h"
#include "s_struct.h"
#include "u_utils.h"
static uint8_t
get_builtin_id(const char com[],
t_msh *msh)
{
uint8_t i;
i = 0;
while (msh->bu_ref[i] && ft_strncmp(com, msh->bu_ref[i],
ft_strlen(msh->bu_ref[i]) + 1) != 0)
{
i++;
}
return (i);
}
static void
e_pipe_child(char *fullpath[],
uint8_t pipe_id,
t_com *ptr,
t_msh *msh)
{
uint8_t bu_id;
uint8_t ret;
dup_redirs(ptr, msh);
if (ft_strncmp(fullpath[pipe_id], "builtin", 8) == 0)
{
bu_id = get_builtin_id(ptr->bin, msh);
ret = msh->bu_ptr[bu_id](ptr->argv + 1, msh);
u_eof_fd(msh->fd);
s_lpipes_clear(&msh->pipes);
s_line_clear(&msh->curr);
s_destroy(msh);
ft_delwords(fullpath);
exit(ret);
}
else
execve(fullpath[pipe_id], ptr->argv, msh->envp);
/* TODO: handle execve failed */
}
static size_t
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
e_pipe_exec_path(char *fullpath[],
struct s_lpipes *head,
t_msh *msh)
{
int fd[256][2];
size_t pipes;
size_t i;
size_t j;
int pid;
int status;
/* TODO: norm, error mgmnt */
pipes = 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++;
}
e_pipe_child(fullpath, i, head->com, msh);
}
head = head->next;
i++;
}
i = 0;
while (i < pipes)
{
close(fd[i][FT_WRITE_END]);
close(fd[i][FT_READ_END]);
i++;
}
waitpid(pid, &status, 0);
msh->ret = WEXITSTATUS(status);
}
void
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;
uint8_t bu_id;
head = ptr;
rptr = ptr;
pipes = e_get_pipes_count(head);
if ((fullpath = (char **)malloc((pipes + 2) * sizeof(char *))) == NULL)
f_alloc_and_destroy_msh(msh);
fullpath[pipes + 1] = NULL;
i = 0;
while (rptr != NULL)
{
if (ft_ischarset("/.", rptr->com->bin[0]) == TRUE)
{
if ((fullpath[i] = ft_strdup(rptr->com->bin)) == NULL)
f_alloc_and_destroy_msh(msh);
}
else if ((envpath = get_env_path(msh)) != NULL)
{
if ((bu_id = get_builtin_id(rptr->com->bin, msh))
< FT_BUILTINS_COUNT)
{
if ((fullpath[i] = ft_strdup("builtin")) == NULL)
f_alloc_and_destroy_msh(msh);
}
else
fullpath[i] = search_in_path(rptr->com->bin, envpath, msh);
ft_delwords(envpath);
}
i++;
rptr = rptr->next;
}
i = 0;
e_pipe_exec_path(fullpath, head, msh);
ft_delwords(fullpath);
}
|
