0
|
1
|
|
2 /*
|
|
3 * Copyright (C) Igor Sysoev
|
|
4 */
|
|
5
|
|
6
|
|
7 #include <ngx_config.h>
|
|
8 #include <ngx_core.h>
|
|
9
|
|
10
|
|
11 ssize_t ngx_read_file(ngx_file_t *file, u_char *buf, size_t size, off_t offset)
|
|
12 {
|
|
13 ssize_t n;
|
|
14
|
|
15 ngx_log_debug4(NGX_LOG_DEBUG_CORE, file->log, 0,
|
|
16 "read: %d, %X, %d, " OFF_T_FMT, file->fd, buf, size, offset);
|
|
17
|
|
18 #if (HAVE_PREAD)
|
|
19
|
|
20 n = pread(file->fd, buf, size, offset);
|
|
21
|
|
22 if (n == -1) {
|
|
23 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno,
|
|
24 "pread() failed, file \"%s\"", file->name.data);
|
|
25 return NGX_ERROR;
|
|
26 }
|
|
27
|
|
28 #else
|
|
29
|
|
30 if (file->sys_offset != offset) {
|
|
31 if (lseek(file->fd, offset, SEEK_SET) == -1) {
|
|
32 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, "lseek() failed");
|
|
33 return NGX_ERROR;
|
|
34 }
|
|
35
|
|
36 file->sys_offset = offset;
|
|
37 }
|
|
38
|
|
39 n = read(file->fd, buf, size);
|
|
40
|
|
41 if (n == -1) {
|
|
42 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, "read() failed");
|
|
43 return NGX_ERROR;
|
|
44 }
|
|
45
|
|
46 file->sys_offset += n;
|
|
47
|
|
48 #endif
|
|
49
|
|
50 file->offset += n;
|
|
51
|
|
52 return n;
|
|
53 }
|
|
54
|
|
55
|
|
56 ssize_t ngx_write_file(ngx_file_t *file, u_char *buf, size_t size, off_t offset)
|
|
57 {
|
|
58 ssize_t n;
|
|
59
|
|
60 #if (HAVE_PWRITE)
|
|
61
|
|
62 n = pwrite(file->fd, buf, size, offset);
|
|
63
|
|
64 if (n == -1) {
|
|
65 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, "pwrite() failed");
|
|
66 return NGX_ERROR;
|
|
67 }
|
|
68
|
|
69 if ((size_t) n != size) {
|
|
70 ngx_log_error(NGX_LOG_CRIT, file->log, 0,
|
|
71 "pwrite() has written only %d of %d", n, size);
|
|
72 return NGX_ERROR;
|
|
73 }
|
|
74
|
|
75 #else
|
|
76
|
|
77 if (file->sys_offset != offset) {
|
|
78 if (lseek(file->fd, offset, SEEK_SET) == -1) {
|
|
79 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, "lseek() failed");
|
|
80 return NGX_ERROR;
|
|
81 }
|
|
82
|
|
83 file->sys_offset = offset;
|
|
84 }
|
|
85
|
|
86 n = write(file->fd, buf, size);
|
|
87
|
|
88 if (n == -1) {
|
|
89 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, "write() failed");
|
|
90 return NGX_ERROR;
|
|
91 }
|
|
92
|
|
93 if ((size_t) n != size) {
|
|
94 ngx_log_error(NGX_LOG_CRIT, file->log, 0,
|
|
95 "write() has written only %d of %d", n, size);
|
|
96 return NGX_ERROR;
|
|
97 }
|
|
98
|
|
99 file->sys_offset += n;
|
|
100
|
|
101 #endif
|
|
102
|
|
103 file->offset += n;
|
|
104
|
|
105 return n;
|
|
106 }
|
|
107
|
|
108
|
|
109 int ngx_open_tempfile(u_char *name, ngx_uint_t persistent)
|
|
110 {
|
|
111 ngx_fd_t fd;
|
|
112
|
|
113 fd = open((const char *) name, O_CREAT|O_EXCL|O_RDWR, 0600);
|
|
114
|
|
115 if (fd != -1 && !persistent) {
|
|
116 unlink((const char *) name);
|
|
117 }
|
|
118
|
|
119 return fd;
|
|
120 }
|
|
121
|
|
122
|
|
123 ssize_t ngx_write_chain_to_file(ngx_file_t *file, ngx_chain_t *cl,
|
|
124 off_t offset, ngx_pool_t *pool)
|
|
125 {
|
|
126 u_char *prev;
|
|
127 size_t size;
|
|
128 ssize_t n;
|
|
129 struct iovec *iov;
|
|
130 ngx_err_t err;
|
|
131 ngx_array_t io;
|
|
132
|
|
133 /* use pwrite() if there's the only buf in a chain */
|
|
134
|
|
135 if (cl->next == NULL) {
|
|
136 return ngx_write_file(file, cl->buf->pos,
|
|
137 (size_t) (cl->buf->last - cl->buf->pos),
|
|
138 offset);
|
|
139 }
|
|
140
|
|
141 prev = NULL;
|
|
142 iov = NULL;
|
|
143 size = 0;
|
|
144
|
|
145 ngx_init_array(io, pool, 10, sizeof(struct iovec), NGX_ERROR);
|
|
146
|
|
147 /* create the iovec and coalesce the neighbouring bufs */
|
|
148
|
|
149 while (cl) {
|
|
150 if (prev == cl->buf->pos) {
|
|
151 iov->iov_len += cl->buf->last - cl->buf->pos;
|
|
152
|
|
153 } else {
|
|
154 ngx_test_null(iov, ngx_push_array(&io), NGX_ERROR);
|
|
155 iov->iov_base = (void *) cl->buf->pos;
|
|
156 iov->iov_len = cl->buf->last - cl->buf->pos;
|
|
157 }
|
|
158
|
|
159 size += cl->buf->last - cl->buf->pos;
|
|
160 prev = cl->buf->last;
|
|
161 cl = cl->next;
|
|
162 }
|
|
163
|
|
164 /* use pwrite() if there's the only iovec buffer */
|
|
165
|
|
166 if (io.nelts == 1) {
|
|
167 iov = io.elts;
|
|
168 return ngx_write_file(file, (u_char *) iov[0].iov_base, iov[0].iov_len,
|
|
169 offset);
|
|
170 }
|
|
171
|
|
172 if (file->sys_offset != offset) {
|
|
173 if (lseek(file->fd, offset, SEEK_SET) == -1) {
|
|
174 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, "lseek() failed");
|
|
175 return NGX_ERROR;
|
|
176 }
|
|
177
|
|
178 file->sys_offset = offset;
|
|
179 }
|
|
180
|
|
181 n = writev(file->fd, io.elts, io.nelts);
|
|
182
|
|
183 if (n == -1) {
|
|
184 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, "writev() failed");
|
|
185 return NGX_ERROR;
|
|
186 }
|
|
187
|
|
188 if ((size_t) n != size) {
|
|
189 ngx_log_error(NGX_LOG_CRIT, file->log, 0,
|
|
190 "writev() has written only %d of %d", n, size);
|
|
191 return NGX_ERROR;
|
|
192 }
|
|
193
|
|
194 file->sys_offset += n;
|
|
195 file->offset += n;
|
|
196
|
|
197 return n;
|
|
198 }
|
|
199
|
|
200
|
|
201 int ngx_open_dir(ngx_str_t *name, ngx_dir_t *dir)
|
|
202 {
|
|
203 dir->dir = opendir((const char *) name->data);
|
|
204
|
|
205 if (dir->dir == NULL) {
|
|
206 return NGX_ERROR;
|
|
207 }
|
|
208
|
|
209 dir->info_valid = 0;
|
|
210
|
|
211 return NGX_OK;
|
|
212 }
|
|
213
|
|
214
|
|
215 #if 0
|
|
216
|
|
217 ssize_t ngx_read_file(ngx_file_t *file, char *buf, size_t size, off_t offset)
|
|
218 {
|
|
219 if (!file->read->ready) {
|
|
220
|
|
221 ngx_memzero(&file->iocb, sizeof(iocb));
|
|
222 file->iocb.aio_fildes = file->fd;
|
|
223 file->iocb.aio_buf = buf;
|
|
224 file->iocb.aio_nbytes = size;
|
|
225 file->iocb.aio_offset = offset;
|
|
226 #if (USE_AIO_KQUEUE)
|
|
227 file->iocb.aio_sigevent.sigev_notify = SIGEV_KEVENT;
|
|
228 file->iocb.aio_sigevent.sigev_notify_kqueue = tid->kq;
|
|
229 file->iocb.aio_sigevent.sigev_value = (union sigval) file;
|
|
230 #endif
|
|
231 #if (USE_AIO_SIGNAL)
|
|
232 file->iocb.aio_sigevent.sigev_notify = SIGEV_SIGNAL;
|
|
233 file->iocb.aio_sigevent.sigev_signo = NGX_SIGAIO;
|
|
234 #ifndef __FreeBSD__
|
|
235 file->iocb.aio_sigevent.sigev_value.sival_ptr = file;
|
|
236 #endif
|
|
237 #endif
|
|
238
|
|
239 if (aio_read(&file->iocb) == -1) {
|
|
240 ngx_log_error(NGX_LOG_ERR, file->log, ngx_errno,
|
|
241 "aio_read() failed");
|
|
242 return NGX_ERROR;
|
|
243
|
|
244 n = aio_error(&file->iocb);
|
|
245 if (n == EINPROGRESS)
|
|
246 return NGX_AGAIN;
|
|
247
|
|
248 if (n == -1) {
|
|
249 ngx_log_error(NGX_LOG_ERR, file->log, ngx_errno,
|
|
250 "aio_read() failed");
|
|
251 return NGX_ERROR;
|
|
252 }
|
|
253 }
|
|
254
|
|
255 ngx_assert(file->iocb.aio_buf == buf), return NGX_ERROR,
|
|
256 "ngx_aio_read_file: another buffer is passed");
|
|
257
|
|
258 n = aio_return(&file->iocb);
|
|
259 if (n == -1) {
|
|
260 ngx_log_error(NGX_LOG_ERR, file->log, ngx_errno,
|
|
261 "aio_read() failed");
|
|
262 return NGX_ERROR;
|
|
263 }
|
|
264
|
|
265 return n;
|
|
266 }
|
|
267
|
|
268 #endif
|