WebSVN – HelenOS – Diff – /branches/dd/uspace/lib/libc/generic/vfs/vfs.c


/*
 * Copyright (c) 2008 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
/** @addtogroup libc
 * @{
 */
/** @file
 */
 
#include <vfs.h>
#include <stdlib.h>
#include <unistd.h>
#include <dirent.h>
#include <fcntl.h>
#include <ipc/ipc.h>
#include <ipc/services.h>
#include <async.h>
#include <atomic.h>
#include <futex.h>
#include <errno.h>
#include <string.h>
#include "../../srv/vfs/vfs.h"
 
int vfs_phone = -1;
atomic_t vfs_phone_futex = FUTEX_INITIALIZER;
 
static int vfs_connect(void)
{
    if (vfs_phone < 0)
        vfs_phone = ipc_connect_me_to(PHONE_NS, SERVICE_VFS, 0, 0);
    return vfs_phone;
}
 
int mount(const char *fs_name, const char *mp, const char *dev)
{
    int res;
    ipcarg_t rc;
    aid_t req;
 
    int dev_handle = 0; /* TODO */
 
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    if (vfs_phone < 0) {
        res = vfs_connect();
        if (res < 0) {
            async_serialize_end();
            futex_up(&vfs_phone_futex);
            return res;
        }
    }
    req = async_send_1(vfs_phone, VFS_MOUNT, dev_handle, NULL);
    rc = ipc_data_write_start(vfs_phone, (void *)fs_name, strlen(fs_name));
    if (rc != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        return (int) rc;
    }
    rc = ipc_data_write_start(vfs_phone, (void *)mp, strlen(mp));
    if (rc != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        return (int) rc;
    }
    async_wait_for(req, &rc);
    async_serialize_end();
    futex_up(&vfs_phone_futex);
    return (int) rc;
}
 
 
int open(const char *path, int oflag, ...)
{
    int res;
    ipcarg_t rc;
    ipc_call_t answer;
    aid_t req;
   
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    if (vfs_phone < 0) {
        res = vfs_connect();
        if (res < 0) {
            async_serialize_end();
            futex_up(&vfs_phone_futex);
            return res;
        }
    }
    req = async_send_2(vfs_phone, VFS_OPEN, oflag, 0, &answer);
    rc = ipc_data_write_start(vfs_phone, path, strlen(path));
    if (rc != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        return (int) rc;
    }
    async_wait_for(req, &rc);
    async_serialize_end();
    futex_up(&vfs_phone_futex);
    return (int) IPC_GET_ARG1(answer);
}
 
ssize_t read(int fildes, void *buf, size_t nbyte)
{
    int res;
    ipcarg_t rc;
    ipc_call_t answer;
    aid_t req;
 
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    if (vfs_phone < 0) {
        res = vfs_connect();
        if (res < 0) {
            async_serialize_end();
            futex_up(&vfs_phone_futex);
            return res;
        }
    }
    req = async_send_1(vfs_phone, VFS_READ, fildes, &answer);
    if (ipc_data_read_start(vfs_phone, (void *)buf, nbyte) != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        return (ssize_t) rc;
    }
    async_wait_for(req, &rc);
    async_serialize_end();
    futex_up(&vfs_phone_futex);
    return (ssize_t) IPC_GET_ARG1(answer);
}
 
ssize_t write(int fildes, const void *buf, size_t nbyte)
{
    int res;
    ipcarg_t rc;
    ipc_call_t answer;
    aid_t req;
 
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    if (vfs_phone < 0) {
        res = vfs_connect();
        if (res < 0) {
            async_serialize_end();
            futex_up(&vfs_phone_futex);
            return res;
        }
    }
    req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer);
    if (ipc_data_write_start(vfs_phone, (void *)buf, nbyte) != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        return (ssize_t) rc;
    }
    async_wait_for(req, &rc);
    async_serialize_end();
    futex_up(&vfs_phone_futex);
    return (ssize_t) IPC_GET_ARG1(answer);
}
 
off_t lseek(int fildes, off_t offset, int whence)
{
    int res;
    ipcarg_t rc;
 
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    if (vfs_phone < 0) {
        res = vfs_connect();
        if (res < 0) {
            async_serialize_end();
            futex_up(&vfs_phone_futex);
            return res;
        }
    }
       
    off_t newoffs;
    rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence,
        &newoffs);
 
    async_serialize_end();
    futex_up(&vfs_phone_futex);
 
    if (rc != EOK)
        return (off_t) -1;
   
    return newoffs;
}
 
int ftruncate(int fildes, off_t length)
{
    int res;
    ipcarg_t rc;
   
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    if (vfs_phone < 0) {
        res = vfs_connect();
        if (res < 0) {
            async_serialize_end();
            futex_up(&vfs_phone_futex);
            return res;
        }
    }
    rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length);
    async_serialize_end();
    futex_up(&vfs_phone_futex);
    return (int) rc;
}
 
DIR *opendir(const char *dirname)
{
    DIR *dirp = malloc(sizeof(DIR));
    if (!dirp)
        return NULL;
    dirp->fd = open(dirname, 0);    /* TODO: must be a directory */
    if (dirp->fd < 0) {
        free(dirp);
        return NULL;
    }
 
    return dirp;
}
 
struct dirent *readdir(DIR *dirp)
{
    ssize_t len = read(dirp->fd, &dirp->res.d_name[0], NAME_MAX + 1);
    if (len <= 0)
        return NULL;
    return &dirp->res;
}
 
void rewinddir(DIR *dirp)
{
    (void) lseek(dirp->fd, 0, SEEK_SET);
}
 
int closedir(DIR *dirp)
{
    (void) close(dirp->fd);
    free(dirp);
    return 0;
}
 
int close(int fildes)
{
    return 0;   /* TODO */
}
 
/** @}
 */
 

Rev 2694	Rev 2699
1	/*	1	/*
2	* Copyright (c) 2008 Jakub Jermar	2	* Copyright (c) 2008 Jakub Jermar
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	/** @addtogroup libc	29	/** @addtogroup libc
30	* @{	30	* @{
31	*/	31	*/
32	/** @file	32	/** @file
33	*/	33	*/
34		34
35	#include <vfs.h>	35	#include <vfs.h>
36	#include <stdlib.h>	36	#include <stdlib.h>
37	#include <unistd.h>	37	#include <unistd.h>
38	#include <dirent.h>	38	#include <dirent.h>
39	#include <fcntl.h>	39	#include <fcntl.h>
40	#include <ipc/ipc.h>	40	#include <ipc/ipc.h>
41	#include <ipc/services.h>	41	#include <ipc/services.h>
42	#include <async.h>	42	#include <async.h>
43	#include <atomic.h>	43	#include <atomic.h>
44	#include <futex.h>	44	#include <futex.h>
45	#include <errno.h>	45	#include <errno.h>
46	#include <string.h>	46	#include <string.h>
47	#include "../../srv/vfs/vfs.h"	47	#include "../../srv/vfs/vfs.h"
48		48
49	int vfs_phone = -1;	49	int vfs_phone = -1;
50	atomic_t vfs_phone_futex = FUTEX_INITIALIZER;	50	atomic_t vfs_phone_futex = FUTEX_INITIALIZER;
51		51
52	static int vfs_connect(void)	52	static int vfs_connect(void)
53	{	53	{
54	if (vfs_phone < 0)	54	if (vfs_phone < 0)
55	vfs_phone = ipc_connect_me_to(PHONE_NS, SERVICE_VFS, 0, 0);	55	vfs_phone = ipc_connect_me_to(PHONE_NS, SERVICE_VFS, 0, 0);
56	return vfs_phone;	56	return vfs_phone;
57	}	57	}
58		58
59	int mount(const char fs_name, const char mp, const char *dev)	59	int mount(const char fs_name, const char mp, const char *dev)
60	{	60	{
61	int res;	61	int res;
62	ipcarg_t rc;	62	ipcarg_t rc;
63	aid_t req;	63	aid_t req;
64		64
65	int dev_handle = 0; /* TODO */	65	int dev_handle = 0; /* TODO */
66		66
67	futex_down(&vfs_phone_futex);	67	futex_down(&vfs_phone_futex);
68	async_serialize_start();	68	async_serialize_start();
69	if (vfs_phone < 0) {	69	if (vfs_phone < 0) {
70	res = vfs_connect();	70	res = vfs_connect();
71	if (res < 0) {	71	if (res < 0) {
72	async_serialize_end();	72	async_serialize_end();
73	futex_up(&vfs_phone_futex);	73	futex_up(&vfs_phone_futex);
74	return res;	74	return res;
75	}	75	}
76	}	76	}
77	req = async_send_1(vfs_phone, VFS_MOUNT, dev_handle, NULL);	77	req = async_send_1(vfs_phone, VFS_MOUNT, dev_handle, NULL);
78	rc = ipc_data_write_start(vfs_phone, (void *)fs_name, strlen(fs_name));	78	rc = ipc_data_write_start(vfs_phone, (void *)fs_name, strlen(fs_name));
79	if (rc != EOK) {	79	if (rc != EOK) {
80	async_wait_for(req, NULL);	80	async_wait_for(req, NULL);
81	async_serialize_end();	81	async_serialize_end();
82	futex_up(&vfs_phone_futex);	82	futex_up(&vfs_phone_futex);
83	return (int) rc;	83	return (int) rc;
84	}	84	}
85	rc = ipc_data_write_start(vfs_phone, (void *)mp, strlen(mp));	85	rc = ipc_data_write_start(vfs_phone, (void *)mp, strlen(mp));
86	if (rc != EOK) {	86	if (rc != EOK) {
87	async_wait_for(req, NULL);	87	async_wait_for(req, NULL);
88	async_serialize_end();	88	async_serialize_end();
89	futex_up(&vfs_phone_futex);	89	futex_up(&vfs_phone_futex);
90	return (int) rc;	90	return (int) rc;
91	}	91	}
92	async_wait_for(req, &rc);	92	async_wait_for(req, &rc);
93	async_serialize_end();	93	async_serialize_end();
94	futex_up(&vfs_phone_futex);	94	futex_up(&vfs_phone_futex);
95	return (int) rc;	95	return (int) rc;
96	}	96	}
97		97
98		98
99	int open(const char *path, int oflag, ...)	99	int open(const char *path, int oflag, ...)
100	{	100	{
101	int res;	101	int res;
102	ipcarg_t rc;	102	ipcarg_t rc;
103	ipc_call_t answer;	103	ipc_call_t answer;
104	aid_t req;	104	aid_t req;
105		105
106	futex_down(&vfs_phone_futex);	106	futex_down(&vfs_phone_futex);
107	async_serialize_start();	107	async_serialize_start();
108	if (vfs_phone < 0) {	108	if (vfs_phone < 0) {
109	res = vfs_connect();	109	res = vfs_connect();
110	if (res < 0) {	110	if (res < 0) {
111	async_serialize_end();	111	async_serialize_end();
112	futex_up(&vfs_phone_futex);	112	futex_up(&vfs_phone_futex);
113	return res;	113	return res;
114	}	114	}
115	}	115	}
116	req = async_send_2(vfs_phone, VFS_OPEN, oflag, 0, &answer);	116	req = async_send_2(vfs_phone, VFS_OPEN, oflag, 0, &answer);
117	rc = ipc_data_write_start(vfs_phone, path, strlen(path));	117	rc = ipc_data_write_start(vfs_phone, path, strlen(path));
118	if (rc != EOK) {	118	if (rc != EOK) {
119	async_wait_for(req, NULL);	119	async_wait_for(req, NULL);
120	async_serialize_end();	120	async_serialize_end();
121	futex_up(&vfs_phone_futex);	121	futex_up(&vfs_phone_futex);
122	return (int) rc;	122	return (int) rc;
123	}	123	}
124	async_wait_for(req, &rc);	124	async_wait_for(req, &rc);
125	async_serialize_end();	125	async_serialize_end();
126	futex_up(&vfs_phone_futex);	126	futex_up(&vfs_phone_futex);
127	return (int) IPC_GET_ARG1(answer);	127	return (int) IPC_GET_ARG1(answer);
128	}	128	}
129		129
130	ssize_t read(int fildes, void *buf, size_t nbyte)	130	ssize_t read(int fildes, void *buf, size_t nbyte)
131	{	131	{
132	int res;	132	int res;
133	ipcarg_t rc;	133	ipcarg_t rc;
134	ipc_call_t answer;	134	ipc_call_t answer;
135	aid_t req;	135	aid_t req;
136		136
137	futex_down(&vfs_phone_futex);	137	futex_down(&vfs_phone_futex);
138	async_serialize_start();	138	async_serialize_start();
139	if (vfs_phone < 0) {	139	if (vfs_phone < 0) {
140	res = vfs_connect();	140	res = vfs_connect();
141	if (res < 0) {	141	if (res < 0) {
142	async_serialize_end();	142	async_serialize_end();
143	futex_up(&vfs_phone_futex);	143	futex_up(&vfs_phone_futex);
144	return res;	144	return res;
145	}	145	}
146	}	146	}
147	req = async_send_1(vfs_phone, VFS_READ, fildes, &answer);	147	req = async_send_1(vfs_phone, VFS_READ, fildes, &answer);
148	if (ipc_data_read_start(vfs_phone, (void *)buf, nbyte) != EOK) {	148	if (ipc_data_read_start(vfs_phone, (void *)buf, nbyte) != EOK) {
149	async_wait_for(req, NULL);	149	async_wait_for(req, NULL);
150	async_serialize_end();	150	async_serialize_end();
151	futex_up(&vfs_phone_futex);	151	futex_up(&vfs_phone_futex);
152	return (ssize_t) rc;	152	return (ssize_t) rc;
153	}	153	}
154	async_wait_for(req, &rc);	154	async_wait_for(req, &rc);
155	async_serialize_end();	155	async_serialize_end();
156	futex_up(&vfs_phone_futex);	156	futex_up(&vfs_phone_futex);
157	return (ssize_t) IPC_GET_ARG1(answer);	157	return (ssize_t) IPC_GET_ARG1(answer);
158	}	158	}
159		159
160	ssize_t write(int fildes, const void *buf, size_t nbyte)	160	ssize_t write(int fildes, const void *buf, size_t nbyte)
161	{	161	{
162	int res;	162	int res;
163	ipcarg_t rc;	163	ipcarg_t rc;
164	ipc_call_t answer;	164	ipc_call_t answer;
165	aid_t req;	165	aid_t req;
166		166
167	futex_down(&vfs_phone_futex);	167	futex_down(&vfs_phone_futex);
168	async_serialize_start();	168	async_serialize_start();
169	if (vfs_phone < 0) {	169	if (vfs_phone < 0) {
170	res = vfs_connect();	170	res = vfs_connect();
171	if (res < 0) {	171	if (res < 0) {
172	async_serialize_end();	172	async_serialize_end();
173	futex_up(&vfs_phone_futex);	173	futex_up(&vfs_phone_futex);
174	return res;	174	return res;
175	}	175	}
176	}	176	}
177	req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer);	177	req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer);
178	if (ipc_data_write_start(vfs_phone, (void *)buf, nbyte) != EOK) {	178	if (ipc_data_write_start(vfs_phone, (void *)buf, nbyte) != EOK) {
179	async_wait_for(req, NULL);	179	async_wait_for(req, NULL);
180	async_serialize_end();	180	async_serialize_end();
181	futex_up(&vfs_phone_futex);	181	futex_up(&vfs_phone_futex);
182	return (ssize_t) rc;	182	return (ssize_t) rc;
183	}	183	}
184	async_wait_for(req, &rc);	184	async_wait_for(req, &rc);
185	async_serialize_end();	185	async_serialize_end();
186	futex_up(&vfs_phone_futex);	186	futex_up(&vfs_phone_futex);
187	return (ssize_t) IPC_GET_ARG1(answer);	187	return (ssize_t) IPC_GET_ARG1(answer);
188	}	188	}
189		189
190	off_t lseek(int fildes, off_t offset, int whence)	190	off_t lseek(int fildes, off_t offset, int whence)
191	{	191	{
192	int res;	192	int res;
193	ipcarg_t rc;	193	ipcarg_t rc;
194		194
195	futex_down(&vfs_phone_futex);	195	futex_down(&vfs_phone_futex);
196	async_serialize_start();	196	async_serialize_start();
197	if (vfs_phone < 0) {	197	if (vfs_phone < 0) {
198	res = vfs_connect();	198	res = vfs_connect();
199	if (res < 0) {	199	if (res < 0) {
200	async_serialize_end();	200	async_serialize_end();
201	futex_up(&vfs_phone_futex);	201	futex_up(&vfs_phone_futex);
202	return res;	202	return res;
203	}	203	}
204	}	204	}
205		205
206	off_t newoffs;	206	off_t newoffs;
207	rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence,	207	rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence,
208	&newoffs);	208	&newoffs);
209		209
210	async_serialize_end();	210	async_serialize_end();
211	futex_up(&vfs_phone_futex);	211	futex_up(&vfs_phone_futex);
212		212
213	if (rc != EOK)	213	if (rc != EOK)
214	return (off_t) -1;	214	return (off_t) -1;
215		215
216	return newoffs;	216	return newoffs;
217	}	217	}
218		218
219	int ftruncate(int fildes, off_t length)	219	int ftruncate(int fildes, off_t length)
220	{	220	{
221	int res;	221	int res;
222	ipcarg_t rc;	222	ipcarg_t rc;
223		223
224	futex_down(&vfs_phone_futex);	224	futex_down(&vfs_phone_futex);
225	async_serialize_start();	225	async_serialize_start();
226	if (vfs_phone < 0) {	226	if (vfs_phone < 0) {
227	res = vfs_connect();	227	res = vfs_connect();
228	if (res < 0) {	228	if (res < 0) {
229	async_serialize_end();	229	async_serialize_end();
230	futex_up(&vfs_phone_futex);	230	futex_up(&vfs_phone_futex);
231	return res;	231	return res;
232	}	232	}
233	}	233	}
234	rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length);	234	rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length);
235	async_serialize_end();	235	async_serialize_end();
236	futex_up(&vfs_phone_futex);	236	futex_up(&vfs_phone_futex);
237	return (int) rc;	237	return (int) rc;
238	}	238	}
239		239
240	DIR opendir(const char dirname)	240	DIR opendir(const char dirname)
241	{	241	{
242	DIR *dirp = malloc(sizeof(DIR));	242	DIR *dirp = malloc(sizeof(DIR));
243	if (!dirp)	243	if (!dirp)
244	return NULL;	244	return NULL;
245	dirp->fd = open(dirname, 0); /* TODO: must be a directory */	245	dirp->fd = open(dirname, 0); /* TODO: must be a directory */
246	if (!dirp->fd) {	246	if (dirp->fd < 0) {
247	free(dirp);	247	free(dirp);
248	return NULL;	248	return NULL;
249	}	249	}
250	dirp->pos = 0;	-
251	return dirp;	250	return dirp;
252	}	251	}
253		252
254	struct dirent readdir(DIR dirp)	253	struct dirent readdir(DIR dirp)
255	{	254	{
-		255	ssize_t len = read(dirp->fd, &dirp->res.d_name[0], NAME_MAX + 1);
-		256	if (len <= 0)
256	return NULL; /* TODO */	257	return NULL;
-		258	return &dirp->res;
257	}	259	}
258		260
259	void rewinddir(DIR *dirp)	261	void rewinddir(DIR *dirp)
260	{	262	{
261	dirp->pos = 0;	263	(void) lseek(dirp->fd, 0, SEEK_SET);
262	}	264	}
263		265
264	int closedir(DIR *dirp)	266	int closedir(DIR *dirp)
265	{	267	{
266	(void) close(dirp->fd);	268	(void) close(dirp->fd);
267	free(dirp);	269	free(dirp);
268	return 0;	270	return 0;
269	}	271	}
270		272
271	int close(int fildes)	273	int close(int fildes)
272	{	274	{
273	return 0; /* TODO */	275	return 0; /* TODO */
274	}	276	}
275		277
276	/** @}	278	/** @}
277	*/	279	*/
278		280

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(root)/branches/dd/uspace/lib/libc/generic/vfs/vfs.c @ 4688 – Rev 2694 → 2699