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
|
/*
* libwebsockets - small server side websockets and web server implementation
*
* Copyright (C) 2010-2018 Andy Green <andy@warmcat.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation:
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
#define _GNU_SOURCE
#include "core/private.h"
#include <pwd.h>
#include <grp.h>
#ifdef LWS_WITH_PLUGINS
#include <dlfcn.h>
#endif
#include <dirent.h>
int lws_plat_apply_FD_CLOEXEC(int n)
{
if (n == -1)
return 0;
return fcntl(n, F_SETFD, FD_CLOEXEC);
}
int
lws_plat_write_file(const char *filename, void *buf, int len)
{
int m, fd;
fd = lws_open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0600);
if (fd == -1)
return 1;
m = write(fd, buf, len);
close(fd);
return m != len;
}
int
lws_plat_read_file(const char *filename, void *buf, int len)
{
int n, fd = lws_open(filename, O_RDONLY);
if (fd == -1)
return -1;
n = read(fd, buf, len);
close(fd);
return n;
}
lws_fop_fd_t
_lws_plat_file_open(const struct lws_plat_file_ops *fops, const char *filename,
const char *vpath, lws_fop_flags_t *flags)
{
struct stat stat_buf;
int ret = lws_open(filename, (*flags) & LWS_FOP_FLAGS_MASK, 0664);
lws_fop_fd_t fop_fd;
if (ret < 0)
return NULL;
if (fstat(ret, &stat_buf) < 0)
goto bail;
fop_fd = malloc(sizeof(*fop_fd));
if (!fop_fd)
goto bail;
fop_fd->fops = fops;
fop_fd->flags = *flags;
fop_fd->fd = ret;
fop_fd->filesystem_priv = NULL; /* we don't use it */
fop_fd->len = stat_buf.st_size;
fop_fd->pos = 0;
return fop_fd;
bail:
close(ret);
return NULL;
}
int
_lws_plat_file_close(lws_fop_fd_t *fop_fd)
{
int fd = (*fop_fd)->fd;
free(*fop_fd);
*fop_fd = NULL;
return close(fd);
}
lws_fileofs_t
_lws_plat_file_seek_cur(lws_fop_fd_t fop_fd, lws_fileofs_t offset)
{
lws_fileofs_t r;
if (offset > 0 &&
offset > (lws_fileofs_t)fop_fd->len - (lws_fileofs_t)fop_fd->pos)
offset = fop_fd->len - fop_fd->pos;
if ((lws_fileofs_t)fop_fd->pos + offset < 0)
offset = -fop_fd->pos;
r = lseek(fop_fd->fd, offset, SEEK_CUR);
if (r >= 0)
fop_fd->pos = r;
else
lwsl_err("error seeking from cur %ld, offset %ld\n",
(long)fop_fd->pos, (long)offset);
return r;
}
int
_lws_plat_file_read(lws_fop_fd_t fop_fd, lws_filepos_t *amount,
uint8_t *buf, lws_filepos_t len)
{
long n;
n = read((int)fop_fd->fd, buf, len);
if (n == -1) {
*amount = 0;
return -1;
}
fop_fd->pos += n;
lwsl_debug("%s: read %ld of req %ld, pos %ld, len %ld\n", __func__, n,
(long)len, (long)fop_fd->pos, (long)fop_fd->len);
*amount = n;
return 0;
}
int
_lws_plat_file_write(lws_fop_fd_t fop_fd, lws_filepos_t *amount,
uint8_t *buf, lws_filepos_t len)
{
long n;
n = write((int)fop_fd->fd, buf, len);
if (n == -1) {
*amount = 0;
return -1;
}
fop_fd->pos += n;
*amount = n;
return 0;
}
|