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
|
/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* e_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 <limits.h>
#include <unistd.h>
#include "e_builtins.h"
#include "e_pipes_next.h"
#include "f_fail.h"
#include "s_lpipes.h"
#include "s_struct.h"
#include "u_utils.h"
#include "u_path.h"
static uint8_t e_get_current_path(char fullpath[],
struct s_lpipes *ptr,
t_msh *msh)
{
uint8_t fp_ret;
fp_ret = 0;
if (ptr->com->bin != NULL && ft_ischarset("/.", ptr->com->bin[0]) == TRUE)
{
ft_strlcpy(fullpath, ptr->com->bin, PATH_MAX);
}
else if (ptr->com->bin != NULL)
{
if (u_get_builtin_id(ptr->com->bin) < B_BUILTINS_COUNT)
{
ft_strlcpy(fullpath, "builtin", 8);
}
else
{
fp_ret = u_search_in_path(fullpath, ptr->com->bin, PATH_MAX, msh);
}
}
return (fp_ret);
}
/*
** TODO: handle fork() failed, etc
*/
static int32_t e_unroll_pipes(int32_t fd[256][2],
size_t pipes,
t_msh *msh)
{
struct s_lpipes *head;
char fullpath[PATH_MAX];
int32_t pid;
uint16_t i;
uint8_t fp_ret;
head = msh->pipes;
i = 0;
while (i <= pipes && i < 255)
{
fp_ret = e_get_current_path(fullpath, head, msh);
if ((pid = fork()) == 0)
{
if (i != 0)
dup2(fd[i - 1][E_WRITE_END], STDIN_FILENO);
if (i != pipes)
dup2(fd[i][E_READ_END], STDOUT_FILENO);
e_close_unused_fds(fd, pipes);
e_pipe_child(fullpath, fp_ret, head->com, msh);
}
head = head->next;
i++;
}
return (pid);
}
/*
** TODO: error mgmnt
*/
static void e_pipe_exec(size_t pipes, t_msh *msh)
{
int32_t fd[256][2];
int32_t pid;
int32_t status;
uint16_t i;
i = 0;
while (i < pipes && i < 255)
{
pipe(fd[i]);
i++;
}
pid = e_unroll_pipes(fd, pipes, msh);
i = 0;
while (i < pipes && i < 255)
{
close(fd[i][E_WRITE_END]);
close(fd[i][E_READ_END]);
i++;
}
waitpid(pid, &status, 0);
msh->ret = WEXITSTATUS(status);
}
/* 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); */
/* } */
/* static char **e_get_fullpath(size_t pipes, t_msh *msh) */
/* { */
/* struct s_lpipes *rptr; */
/* char **fullpath; */
/* size_t i; */
/* rptr = msh->pipes; */
/* if ((fullpath = (char **)malloc((pipes + 2) * sizeof(char *))) == NULL) */
/* f_alloc_and_destroy_msh(msh); */
/* fullpath[pipes + 1] = NULL; */
/* i = 0; */
/* while (rptr != NULL) */
/* { */
/* fullpath[i] = e_get_current_path(rptr, msh); */
/* i++; */
/* rptr = rptr->next; */
/* } */
/* return (fullpath); */
/* } */
void e_pipes(t_msh *msh)
{
const size_t pipes = e_get_pipes_count(msh->pipes);
e_pipe_exec(pipes, msh);
s_lpipes_clear(&msh->pipes);
}
|
