WebSVN – HelenOS – Diff – /branches/dynload/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/vfs.h>
#include <vfs/canonify.h>
#include <stdlib.h>
#include <unistd.h>
#include <dirent.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <stdio.h>
#include <sys/types.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 <ipc/devmap.h>
#include "../../srv/vfs/vfs.h"
 
int vfs_phone = -1;
futex_t vfs_phone_futex = FUTEX_INITIALIZER;
 
futex_t cwd_futex = FUTEX_INITIALIZER;
DIR *cwd_dir = NULL;
char *cwd_path = NULL;
size_t cwd_len = 0;
 
static char *absolutize(const char *path, size_t *retlen)
{
    char *ncwd_path;
 
    futex_down(&cwd_futex);
    size_t len = strlen(path);
    if (*path != '/') {
        if (!cwd_path) {
            futex_up(&cwd_futex);
            return NULL;
        }
        ncwd_path = malloc(len + cwd_len + 1);
        if (!ncwd_path) {
            futex_up(&cwd_futex);
            return NULL;
        }
        strcpy(ncwd_path, cwd_path);
        ncwd_path[cwd_len] = '/';
        ncwd_path[cwd_len + 1] = '\0';
    } else {
        ncwd_path = malloc(len + 1);
        if (!ncwd_path) {
            futex_up(&cwd_futex);
            return NULL;
        }
        ncwd_path[0] = '\0';
    }
    strcat(ncwd_path, path);
    if (!canonify(ncwd_path, retlen)) {
        futex_up(&cwd_futex);
        free(ncwd_path);
        return NULL;
    }
    futex_up(&cwd_futex);
    return ncwd_path;
}
 
static int vfs_connect(void)
{
    if (vfs_phone < 0)
        vfs_phone = ipc_connect_me_to(PHONE_NS, SERVICE_VFS, 0, 0);
    return vfs_phone;
}
 
static int device_get_handle(char *name, dev_handle_t *handle)
{
    int phone = ipc_connect_me_to(PHONE_NS, SERVICE_DEVMAP, DEVMAP_CLIENT, 0);
    if (phone < 0)
        return phone;
   
    ipc_call_t answer;
    aid_t req = async_send_2(phone, DEVMAP_DEVICE_GET_HANDLE, 0, 0,
        &answer);
   
    ipcarg_t retval = ipc_data_write_start(phone, name, strlen(name) + 1);
 
    if (retval != EOK) {
        async_wait_for(req, NULL);
        ipc_hangup(phone);
        return retval;
    }
 
    async_wait_for(req, &retval);
 
    if (handle != NULL)
        *handle = -1;
   
    if (retval == EOK) {
        if (handle != NULL)
            *handle = (dev_handle_t) IPC_GET_ARG1(answer);
    }
   
    ipc_hangup(phone);
    return retval;
}
 
int mount(const char *fs_name, const char *mp, const char *dev)
{
    int res;
    ipcarg_t rc;
    aid_t req;
    dev_handle_t dev_handle;
   
    res = device_get_handle(dev, &dev_handle);
    if (res != EOK)
        return res;
   
    size_t mpa_len;
    char *mpa = absolutize(mp, &mpa_len);
    if (!mpa)
        return ENOMEM;
 
    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);
            free(mpa);
            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);
        free(mpa);
        return (int) rc;
    }
    rc = ipc_data_write_start(vfs_phone, (void *)mpa, mpa_len);
    if (rc != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        free(mpa);
        return (int) rc;
    }
    async_wait_for(req, &rc);
    async_serialize_end();
    futex_up(&vfs_phone_futex);
    free(mpa);
    return (int) rc;
}
 
static int _open(const char *path, int lflag, int oflag, ...)
{
    int res;
    ipcarg_t rc;
    ipc_call_t answer;
    aid_t req;
   
    size_t pa_len;
    char *pa = absolutize(path, &pa_len);
    if (!pa)
        return ENOMEM;
   
    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);
            free(pa);
            return res;
        }
    }
    req = async_send_3(vfs_phone, VFS_OPEN, lflag, oflag, 0, &answer);
    rc = ipc_data_write_start(vfs_phone, pa, pa_len);
    if (rc != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        free(pa);
        return (int) rc;
    }
    async_wait_for(req, &rc);
    async_serialize_end();
    futex_up(&vfs_phone_futex);
    free(pa);
    return (int) IPC_GET_ARG1(answer);
}
 
int open(const char *path, int oflag, ...)
{
    return _open(path, L_FILE, oflag);
}
 
int close(int fildes)
{
    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_1_0(vfs_phone, VFS_CLOSE, fildes);
 
    async_serialize_end();
    futex_up(&vfs_phone_futex);
   
    return (int)rc;
}
 
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);
    rc = ipc_data_read_start(vfs_phone, (void *)buf, nbyte);
    if (rc != 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);
    if (rc == EOK)
        return (ssize_t) IPC_GET_ARG1(answer);
    else
        return -1;
}
 
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);
    rc = ipc_data_write_start(vfs_phone, (void *)buf, nbyte);
    if (rc != 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);
    if (rc == EOK)
        return (ssize_t) IPC_GET_ARG1(answer);
    else
        return -1;
}
 
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,
        (ipcarg_t)&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, L_DIRECTORY, 0);
    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 mkdir(const char *path, mode_t mode)
{
    int res;
    ipcarg_t rc;
    aid_t req;
   
    size_t pa_len;
    char *pa = absolutize(path, &pa_len);
    if (!pa)
        return ENOMEM;
 
    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);
            free(pa);
            return res;
        }
    }
    req = async_send_1(vfs_phone, VFS_MKDIR, mode, NULL);
    rc = ipc_data_write_start(vfs_phone, pa, pa_len);
    if (rc != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        free(pa);
        return (int) rc;
    }
    async_wait_for(req, &rc);
    async_serialize_end();
    futex_up(&vfs_phone_futex);
    free(pa);
    return rc;
}
 
static int _unlink(const char *path, int lflag)
{
    int res;
    ipcarg_t rc;
    aid_t req;
   
    size_t pa_len;
    char *pa = absolutize(path, &pa_len);
    if (!pa)
        return ENOMEM;
 
    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);
            free(pa);
            return res;
        }
    }
    req = async_send_0(vfs_phone, VFS_UNLINK, NULL);
    rc = ipc_data_write_start(vfs_phone, pa, pa_len);
    if (rc != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        free(pa);
        return (int) rc;
    }
    async_wait_for(req, &rc);
    async_serialize_end();
    futex_up(&vfs_phone_futex);
    free(pa);
    return rc;
}
 
int unlink(const char *path)
{
    return _unlink(path, L_NONE);
}
 
int rmdir(const char *path)
{
    return _unlink(path, L_DIRECTORY);
}
 
int rename(const char *old, const char *new)
{
    int res;
    ipcarg_t rc;
    aid_t req;
   
    size_t olda_len;
    char *olda = absolutize(old, &olda_len);
    if (!olda)
        return ENOMEM;
 
    size_t newa_len;
    char *newa = absolutize(new, &newa_len);
    if (!newa) {
        free(olda);
        return ENOMEM;
    }
 
    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);
            free(olda);
            free(newa);
            return res;
        }
    }
    req = async_send_0(vfs_phone, VFS_RENAME, NULL);
    rc = ipc_data_write_start(vfs_phone, olda, olda_len);
    if (rc != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        free(olda);
        free(newa);
        return (int) rc;
    }
    rc = ipc_data_write_start(vfs_phone, newa, newa_len);
    if (rc != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        free(olda);
        free(newa);
        return (int) rc;
    }
    async_wait_for(req, &rc);
    async_serialize_end();
    futex_up(&vfs_phone_futex);
    free(olda);
    free(newa);
    return rc;
}
 
int chdir(const char *path)
{
    size_t pa_len;
    char *pa = absolutize(path, &pa_len);
    if (!pa)
        return ENOMEM;
 
    DIR *d = opendir(pa);
    if (!d) {
        free(pa);
        return ENOENT;
    }
 
    futex_down(&cwd_futex);
    if (cwd_dir) {
        closedir(cwd_dir);
        cwd_dir = NULL;
        free(cwd_path);
        cwd_path = NULL;
        cwd_len = 0;
    }
    cwd_dir = d;
    cwd_path = pa;
    cwd_len = pa_len;
    futex_up(&cwd_futex);
}
 
char *getcwd(char *buf, size_t size)
{
    if (!size)
        return NULL;
    futex_down(&cwd_futex);
    if (size < cwd_len + 1) {
        futex_up(&cwd_futex);
        return NULL;
    }
    strcpy(buf, cwd_path);
    futex_up(&cwd_futex);
    return buf;
}
 
/** @}
 */
 

Rev 2927	Rev 3150
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/vfs.h>	35	#include <vfs/vfs.h>
36	#include <vfs/canonify.h>	36	#include <vfs/canonify.h>
37	#include <stdlib.h>	37	#include <stdlib.h>
38	#include <unistd.h>	38	#include <unistd.h>
39	#include <dirent.h>	39	#include <dirent.h>
40	#include <fcntl.h>	40	#include <fcntl.h>
41	#include <sys/stat.h>	41	#include <sys/stat.h>
42	#include <stdio.h>	42	#include <stdio.h>
43	#include <sys/types.h>	43	#include <sys/types.h>
44	#include <ipc/ipc.h>	44	#include <ipc/ipc.h>
45	#include <ipc/services.h>	45	#include <ipc/services.h>
46	#include <async.h>	46	#include <async.h>
47	#include <atomic.h>	47	#include <atomic.h>
48	#include <futex.h>	48	#include <futex.h>
49	#include <errno.h>	49	#include <errno.h>
50	#include <string.h>	50	#include <string.h>
-		51	#include <ipc/devmap.h>
51	#include "../../srv/vfs/vfs.h"	52	#include "../../srv/vfs/vfs.h"
52		53
53	int vfs_phone = -1;	54	int vfs_phone = -1;
54	futex_t vfs_phone_futex = FUTEX_INITIALIZER;	55	futex_t vfs_phone_futex = FUTEX_INITIALIZER;
55		56
56	futex_t cwd_futex = FUTEX_INITIALIZER;	57	futex_t cwd_futex = FUTEX_INITIALIZER;
57	DIR *cwd_dir = NULL;	58	DIR *cwd_dir = NULL;
58	char *cwd_path = NULL;	59	char *cwd_path = NULL;
59	size_t cwd_len = 0;	60	size_t cwd_len = 0;
60		61
61	static char absolutize(const char path, size_t *retlen)	62	static char absolutize(const char path, size_t *retlen)
62	{	63	{
63	char *ncwd_path;	64	char *ncwd_path;
64		65
65	futex_down(&cwd_futex);	66	futex_down(&cwd_futex);
66	size_t len = strlen(path);	67	size_t len = strlen(path);
67	if (*path != '/') {	68	if (*path != '/') {
68	if (!cwd_path) {	69	if (!cwd_path) {
69	futex_up(&cwd_futex);	70	futex_up(&cwd_futex);
70	return NULL;	71	return NULL;
71	}	72	}
72	ncwd_path = malloc(len + cwd_len + 1);	73	ncwd_path = malloc(len + cwd_len + 1);
73	if (!ncwd_path) {	74	if (!ncwd_path) {
74	futex_up(&cwd_futex);	75	futex_up(&cwd_futex);
75	return NULL;	76	return NULL;
76	}	77	}
77	strcpy(ncwd_path, cwd_path);	78	strcpy(ncwd_path, cwd_path);
78	ncwd_path[cwd_len] = '/';	79	ncwd_path[cwd_len] = '/';
79	ncwd_path[cwd_len + 1] = '\0';	80	ncwd_path[cwd_len + 1] = '\0';
80	} else {	81	} else {
81	ncwd_path = malloc(len + 1);	82	ncwd_path = malloc(len + 1);
82	if (!ncwd_path) {	83	if (!ncwd_path) {
83	futex_up(&cwd_futex);	84	futex_up(&cwd_futex);
84	return NULL;	85	return NULL;
85	}	86	}
86	ncwd_path[0] = '\0';	87	ncwd_path[0] = '\0';
87	}	88	}
88	strcat(ncwd_path, path);	89	strcat(ncwd_path, path);
89	if (!canonify(ncwd_path, retlen)) {	90	if (!canonify(ncwd_path, retlen)) {
90	futex_up(&cwd_futex);	91	futex_up(&cwd_futex);
91	free(ncwd_path);	92	free(ncwd_path);
92	return NULL;	93	return NULL;
93	}	94	}
94	futex_up(&cwd_futex);	95	futex_up(&cwd_futex);
95	return ncwd_path;	96	return ncwd_path;
96	}	97	}
97		98
98	static int vfs_connect(void)	99	static int vfs_connect(void)
99	{	100	{
100	if (vfs_phone < 0)	101	if (vfs_phone < 0)
101	vfs_phone = ipc_connect_me_to(PHONE_NS, SERVICE_VFS, 0, 0);	102	vfs_phone = ipc_connect_me_to(PHONE_NS, SERVICE_VFS, 0, 0);
102	return vfs_phone;	103	return vfs_phone;
103	}	104	}
104		105
-		106	static int device_get_handle(char name, dev_handle_t handle)
-		107	{
-		108	int phone = ipc_connect_me_to(PHONE_NS, SERVICE_DEVMAP, DEVMAP_CLIENT, 0);
-		109	if (phone < 0)
-		110	return phone;
-		111
-		112	ipc_call_t answer;
-		113	aid_t req = async_send_2(phone, DEVMAP_DEVICE_GET_HANDLE, 0, 0,
-		114	&answer);
-		115
-		116	ipcarg_t retval = ipc_data_write_start(phone, name, strlen(name) + 1);
-		117
-		118	if (retval != EOK) {
-		119	async_wait_for(req, NULL);
-		120	ipc_hangup(phone);
-		121	return retval;
-		122	}
-		123
-		124	async_wait_for(req, &retval);
-		125
-		126	if (handle != NULL)
-		127	*handle = -1;
-		128
-		129	if (retval == EOK) {
-		130	if (handle != NULL)
-		131	*handle = (dev_handle_t) IPC_GET_ARG1(answer);
-		132	}
-		133
-		134	ipc_hangup(phone);
-		135	return retval;
-		136	}
-		137
105	int mount(const char fs_name, const char mp, const char *dev)	138	int mount(const char fs_name, const char mp, const char *dev)
106	{	139	{
107	int res;	140	int res;
108	ipcarg_t rc;	141	ipcarg_t rc;
109	aid_t req;	142	aid_t req;
-		143	dev_handle_t dev_handle;
110		144
111	dev_handle_t dev_handle = 0; /* TODO */	145	res = device_get_handle(dev, &dev_handle);
-		146	if (res != EOK)
-		147	return res;
112		148
113	size_t mpa_len;	149	size_t mpa_len;
114	char *mpa = absolutize(mp, &mpa_len);	150	char *mpa = absolutize(mp, &mpa_len);
115	if (!mpa)	151	if (!mpa)
116	return ENOMEM;	152	return ENOMEM;
117		153
118	futex_down(&vfs_phone_futex);	154	futex_down(&vfs_phone_futex);
119	async_serialize_start();	155	async_serialize_start();
120	if (vfs_phone < 0) {	156	if (vfs_phone < 0) {
121	res = vfs_connect();	157	res = vfs_connect();
122	if (res < 0) {	158	if (res < 0) {
123	async_serialize_end();	159	async_serialize_end();
124	futex_up(&vfs_phone_futex);	160	futex_up(&vfs_phone_futex);
125	free(mpa);	161	free(mpa);
126	return res;	162	return res;
127	}	163	}
128	}	164	}
129	req = async_send_1(vfs_phone, VFS_MOUNT, dev_handle, NULL);	165	req = async_send_1(vfs_phone, VFS_MOUNT, dev_handle, NULL);
130	rc = ipc_data_write_start(vfs_phone, (void *)fs_name, strlen(fs_name));	166	rc = ipc_data_write_start(vfs_phone, (void *)fs_name, strlen(fs_name));
131	if (rc != EOK) {	167	if (rc != EOK) {
132	async_wait_for(req, NULL);	168	async_wait_for(req, NULL);
133	async_serialize_end();	169	async_serialize_end();
134	futex_up(&vfs_phone_futex);	170	futex_up(&vfs_phone_futex);
135	free(mpa);	171	free(mpa);
136	return (int) rc;	172	return (int) rc;
137	}	173	}
138	rc = ipc_data_write_start(vfs_phone, (void *)mpa, mpa_len);	174	rc = ipc_data_write_start(vfs_phone, (void *)mpa, mpa_len);
139	if (rc != EOK) {	175	if (rc != EOK) {
140	async_wait_for(req, NULL);	176	async_wait_for(req, NULL);
141	async_serialize_end();	177	async_serialize_end();
142	futex_up(&vfs_phone_futex);	178	futex_up(&vfs_phone_futex);
143	free(mpa);	179	free(mpa);
144	return (int) rc;	180	return (int) rc;
145	}	181	}
146	async_wait_for(req, &rc);	182	async_wait_for(req, &rc);
147	async_serialize_end();	183	async_serialize_end();
148	futex_up(&vfs_phone_futex);	184	futex_up(&vfs_phone_futex);
149	free(mpa);	185	free(mpa);
150	return (int) rc;	186	return (int) rc;
151	}	187	}
152		188
153	static int _open(const char *path, int lflag, int oflag, ...)	189	static int _open(const char *path, int lflag, int oflag, ...)
154	{	190	{
155	int res;	191	int res;
156	ipcarg_t rc;	192	ipcarg_t rc;
157	ipc_call_t answer;	193	ipc_call_t answer;
158	aid_t req;	194	aid_t req;
159		195
160	size_t pa_len;	196	size_t pa_len;
161	char *pa = absolutize(path, &pa_len);	197	char *pa = absolutize(path, &pa_len);
162	if (!pa)	198	if (!pa)
163	return ENOMEM;	199	return ENOMEM;
164		200
165	futex_down(&vfs_phone_futex);	201	futex_down(&vfs_phone_futex);
166	async_serialize_start();	202	async_serialize_start();
167	if (vfs_phone < 0) {	203	if (vfs_phone < 0) {
168	res = vfs_connect();	204	res = vfs_connect();
169	if (res < 0) {	205	if (res < 0) {
170	async_serialize_end();	206	async_serialize_end();
171	futex_up(&vfs_phone_futex);	207	futex_up(&vfs_phone_futex);
172	free(pa);	208	free(pa);
173	return res;	209	return res;
174	}	210	}
175	}	211	}
176	req = async_send_3(vfs_phone, VFS_OPEN, lflag, oflag, 0, &answer);	212	req = async_send_3(vfs_phone, VFS_OPEN, lflag, oflag, 0, &answer);
177	rc = ipc_data_write_start(vfs_phone, pa, pa_len);	213	rc = ipc_data_write_start(vfs_phone, pa, pa_len);
178	if (rc != EOK) {	214	if (rc != EOK) {
179	async_wait_for(req, NULL);	215	async_wait_for(req, NULL);
180	async_serialize_end();	216	async_serialize_end();
181	futex_up(&vfs_phone_futex);	217	futex_up(&vfs_phone_futex);
182	free(pa);	218	free(pa);
183	return (int) rc;	219	return (int) rc;
184	}	220	}
185	async_wait_for(req, &rc);	221	async_wait_for(req, &rc);
186	async_serialize_end();	222	async_serialize_end();
187	futex_up(&vfs_phone_futex);	223	futex_up(&vfs_phone_futex);
188	free(pa);	224	free(pa);
189	return (int) IPC_GET_ARG1(answer);	225	return (int) IPC_GET_ARG1(answer);
190	}	226	}
191		227
192	int open(const char *path, int oflag, ...)	228	int open(const char *path, int oflag, ...)
193	{	229	{
194	return _open(path, L_FILE, oflag);	230	return _open(path, L_FILE, oflag);
195	}	231	}
196		232
197	int close(int fildes)	233	int close(int fildes)
198	{	234	{
199	int res;	235	int res;
200	ipcarg_t rc;	236	ipcarg_t rc;
201		237
202	futex_down(&vfs_phone_futex);	238	futex_down(&vfs_phone_futex);
203	async_serialize_start();	239	async_serialize_start();
204	if (vfs_phone < 0) {	240	if (vfs_phone < 0) {
205	res = vfs_connect();	241	res = vfs_connect();
206	if (res < 0) {	242	if (res < 0) {
207	async_serialize_end();	243	async_serialize_end();
208	futex_up(&vfs_phone_futex);	244	futex_up(&vfs_phone_futex);
209	return res;	245	return res;
210	}	246	}
211	}	247	}
212		248
213	rc = async_req_1_0(vfs_phone, VFS_CLOSE, fildes);	249	rc = async_req_1_0(vfs_phone, VFS_CLOSE, fildes);
214		250
215	async_serialize_end();	251	async_serialize_end();
216	futex_up(&vfs_phone_futex);	252	futex_up(&vfs_phone_futex);
217		253
218	return (int)rc;	254	return (int)rc;
219	}	255	}
220		256
221	ssize_t read(int fildes, void *buf, size_t nbyte)	257	ssize_t read(int fildes, void *buf, size_t nbyte)
222	{	258	{
223	int res;	259	int res;
224	ipcarg_t rc;	260	ipcarg_t rc;
225	ipc_call_t answer;	261	ipc_call_t answer;
226	aid_t req;	262	aid_t req;
227		263
228	futex_down(&vfs_phone_futex);	264	futex_down(&vfs_phone_futex);
229	async_serialize_start();	265	async_serialize_start();
230	if (vfs_phone < 0) {	266	if (vfs_phone < 0) {
231	res = vfs_connect();	267	res = vfs_connect();
232	if (res < 0) {	268	if (res < 0) {
233	async_serialize_end();	269	async_serialize_end();
234	futex_up(&vfs_phone_futex);	270	futex_up(&vfs_phone_futex);
235	return res;	271	return res;
236	}	272	}
237	}	273	}
238	req = async_send_1(vfs_phone, VFS_READ, fildes, &answer);	274	req = async_send_1(vfs_phone, VFS_READ, fildes, &answer);
239	rc = ipc_data_read_start(vfs_phone, (void *)buf, nbyte);	275	rc = ipc_data_read_start(vfs_phone, (void *)buf, nbyte);
240	if (rc != EOK) {	276	if (rc != EOK) {
241	async_wait_for(req, NULL);	277	async_wait_for(req, NULL);
242	async_serialize_end();	278	async_serialize_end();
243	futex_up(&vfs_phone_futex);	279	futex_up(&vfs_phone_futex);
244	return (ssize_t) rc;	280	return (ssize_t) rc;
245	}	281	}
246	async_wait_for(req, &rc);	282	async_wait_for(req, &rc);
247	async_serialize_end();	283	async_serialize_end();
248	futex_up(&vfs_phone_futex);	284	futex_up(&vfs_phone_futex);
249	if (rc == EOK)	285	if (rc == EOK)
250	return (ssize_t) IPC_GET_ARG1(answer);	286	return (ssize_t) IPC_GET_ARG1(answer);
251	else	287	else
252	return -1;	288	return -1;
253	}	289	}
254		290
255	ssize_t write(int fildes, const void *buf, size_t nbyte)	291	ssize_t write(int fildes, const void *buf, size_t nbyte)
256	{	292	{
257	int res;	293	int res;
258	ipcarg_t rc;	294	ipcarg_t rc;
259	ipc_call_t answer;	295	ipc_call_t answer;
260	aid_t req;	296	aid_t req;
261		297
262	futex_down(&vfs_phone_futex);	298	futex_down(&vfs_phone_futex);
263	async_serialize_start();	299	async_serialize_start();
264	if (vfs_phone < 0) {	300	if (vfs_phone < 0) {
265	res = vfs_connect();	301	res = vfs_connect();
266	if (res < 0) {	302	if (res < 0) {
267	async_serialize_end();	303	async_serialize_end();
268	futex_up(&vfs_phone_futex);	304	futex_up(&vfs_phone_futex);
269	return res;	305	return res;
270	}	306	}
271	}	307	}
272	req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer);	308	req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer);
273	rc = ipc_data_write_start(vfs_phone, (void *)buf, nbyte);	309	rc = ipc_data_write_start(vfs_phone, (void *)buf, nbyte);
274	if (rc != EOK) {	310	if (rc != EOK) {
275	async_wait_for(req, NULL);	311	async_wait_for(req, NULL);
276	async_serialize_end();	312	async_serialize_end();
277	futex_up(&vfs_phone_futex);	313	futex_up(&vfs_phone_futex);
278	return (ssize_t) rc;	314	return (ssize_t) rc;
279	}	315	}
280	async_wait_for(req, &rc);	316	async_wait_for(req, &rc);
281	async_serialize_end();	317	async_serialize_end();
282	futex_up(&vfs_phone_futex);	318	futex_up(&vfs_phone_futex);
283	if (rc == EOK)	319	if (rc == EOK)
284	return (ssize_t) IPC_GET_ARG1(answer);	320	return (ssize_t) IPC_GET_ARG1(answer);
285	else	321	else
286	return -1;	322	return -1;
287	}	323	}
288		324
289	off_t lseek(int fildes, off_t offset, int whence)	325	off_t lseek(int fildes, off_t offset, int whence)
290	{	326	{
291	int res;	327	int res;
292	ipcarg_t rc;	328	ipcarg_t rc;
293		329
294	futex_down(&vfs_phone_futex);	330	futex_down(&vfs_phone_futex);
295	async_serialize_start();	331	async_serialize_start();
296	if (vfs_phone < 0) {	332	if (vfs_phone < 0) {
297	res = vfs_connect();	333	res = vfs_connect();
298	if (res < 0) {	334	if (res < 0) {
299	async_serialize_end();	335	async_serialize_end();
300	futex_up(&vfs_phone_futex);	336	futex_up(&vfs_phone_futex);
301	return res;	337	return res;
302	}	338	}
303	}	339	}
304		340
305	off_t newoffs;	341	off_t newoffs;
306	rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence,	342	rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence,
307	(ipcarg_t)&newoffs);	343	(ipcarg_t)&newoffs);
308		344
309	async_serialize_end();	345	async_serialize_end();
310	futex_up(&vfs_phone_futex);	346	futex_up(&vfs_phone_futex);
311		347
312	if (rc != EOK)	348	if (rc != EOK)
313	return (off_t) -1;	349	return (off_t) -1;
314		350
315	return newoffs;	351	return newoffs;
316	}	352	}
317		353
318	int ftruncate(int fildes, off_t length)	354	int ftruncate(int fildes, off_t length)
319	{	355	{
320	int res;	356	int res;
321	ipcarg_t rc;	357	ipcarg_t rc;
322		358
323	futex_down(&vfs_phone_futex);	359	futex_down(&vfs_phone_futex);
324	async_serialize_start();	360	async_serialize_start();
325	if (vfs_phone < 0) {	361	if (vfs_phone < 0) {
326	res = vfs_connect();	362	res = vfs_connect();
327	if (res < 0) {	363	if (res < 0) {
328	async_serialize_end();	364	async_serialize_end();
329	futex_up(&vfs_phone_futex);	365	futex_up(&vfs_phone_futex);
330	return res;	366	return res;
331	}	367	}
332	}	368	}
333	rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length);	369	rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length);
334	async_serialize_end();	370	async_serialize_end();
335	futex_up(&vfs_phone_futex);	371	futex_up(&vfs_phone_futex);
336	return (int) rc;	372	return (int) rc;
337	}	373	}
338		374
339	DIR opendir(const char dirname)	375	DIR opendir(const char dirname)
340	{	376	{
341	DIR *dirp = malloc(sizeof(DIR));	377	DIR *dirp = malloc(sizeof(DIR));
342	if (!dirp)	378	if (!dirp)
343	return NULL;	379	return NULL;
344	dirp->fd = _open(dirname, L_DIRECTORY, 0);	380	dirp->fd = _open(dirname, L_DIRECTORY, 0);
345	if (dirp->fd < 0) {	381	if (dirp->fd < 0) {
346	free(dirp);	382	free(dirp);
347	return NULL;	383	return NULL;
348	}	384	}
349	return dirp;	385	return dirp;
350	}	386	}
351		387
352	struct dirent readdir(DIR dirp)	388	struct dirent readdir(DIR dirp)
353	{	389	{
354	ssize_t len = read(dirp->fd, &dirp->res.d_name[0], NAME_MAX + 1);	390	ssize_t len = read(dirp->fd, &dirp->res.d_name[0], NAME_MAX + 1);
355	if (len <= 0)	391	if (len <= 0)
356	return NULL;	392	return NULL;
357	return &dirp->res;	393	return &dirp->res;
358	}	394	}
359		395
360	void rewinddir(DIR *dirp)	396	void rewinddir(DIR *dirp)
361	{	397	{
362	(void) lseek(dirp->fd, 0, SEEK_SET);	398	(void) lseek(dirp->fd, 0, SEEK_SET);
363	}	399	}
364		400
365	int closedir(DIR *dirp)	401	int closedir(DIR *dirp)
366	{	402	{
367	(void) close(dirp->fd);	403	(void) close(dirp->fd);
368	free(dirp);	404	free(dirp);
369	return 0;	405	return 0;
370	}	406	}
371		407
372	int mkdir(const char *path, mode_t mode)	408	int mkdir(const char *path, mode_t mode)
373	{	409	{
374	int res;	410	int res;
375	ipcarg_t rc;	411	ipcarg_t rc;
376	aid_t req;	412	aid_t req;
377		413
378	size_t pa_len;	414	size_t pa_len;
379	char *pa = absolutize(path, &pa_len);	415	char *pa = absolutize(path, &pa_len);
380	if (!pa)	416	if (!pa)
381	return ENOMEM;	417	return ENOMEM;
382		418
383	futex_down(&vfs_phone_futex);	419	futex_down(&vfs_phone_futex);
384	async_serialize_start();	420	async_serialize_start();
385	if (vfs_phone < 0) {	421	if (vfs_phone < 0) {
386	res = vfs_connect();	422	res = vfs_connect();
387	if (res < 0) {	423	if (res < 0) {
388	async_serialize_end();	424	async_serialize_end();
389	futex_up(&vfs_phone_futex);	425	futex_up(&vfs_phone_futex);
390	free(pa);	426	free(pa);
391	return res;	427	return res;
392	}	428	}
393	}	429	}
394	req = async_send_1(vfs_phone, VFS_MKDIR, mode, NULL);	430	req = async_send_1(vfs_phone, VFS_MKDIR, mode, NULL);
395	rc = ipc_data_write_start(vfs_phone, pa, pa_len);	431	rc = ipc_data_write_start(vfs_phone, pa, pa_len);
396	if (rc != EOK) {	432	if (rc != EOK) {
397	async_wait_for(req, NULL);	433	async_wait_for(req, NULL);
398	async_serialize_end();	434	async_serialize_end();
399	futex_up(&vfs_phone_futex);	435	futex_up(&vfs_phone_futex);
400	free(pa);	436	free(pa);
401	return (int) rc;	437	return (int) rc;
402	}	438	}
403	async_wait_for(req, &rc);	439	async_wait_for(req, &rc);
404	async_serialize_end();	440	async_serialize_end();
405	futex_up(&vfs_phone_futex);	441	futex_up(&vfs_phone_futex);
406	free(pa);	442	free(pa);
407	return rc;	443	return rc;
408	}	444	}
409		445
410	static int _unlink(const char *path, int lflag)	446	static int _unlink(const char *path, int lflag)
411	{	447	{
412	int res;	448	int res;
413	ipcarg_t rc;	449	ipcarg_t rc;
414	aid_t req;	450	aid_t req;
415		451
416	size_t pa_len;	452	size_t pa_len;
417	char *pa = absolutize(path, &pa_len);	453	char *pa = absolutize(path, &pa_len);
418	if (!pa)	454	if (!pa)
419	return ENOMEM;	455	return ENOMEM;
420		456
421	futex_down(&vfs_phone_futex);	457	futex_down(&vfs_phone_futex);
422	async_serialize_start();	458	async_serialize_start();
423	if (vfs_phone < 0) {	459	if (vfs_phone < 0) {
424	res = vfs_connect();	460	res = vfs_connect();
425	if (res < 0) {	461	if (res < 0) {
426	async_serialize_end();	462	async_serialize_end();
427	futex_up(&vfs_phone_futex);	463	futex_up(&vfs_phone_futex);
428	free(pa);	464	free(pa);
429	return res;	465	return res;
430	}	466	}
431	}	467	}
432	req = async_send_0(vfs_phone, VFS_UNLINK, NULL);	468	req = async_send_0(vfs_phone, VFS_UNLINK, NULL);
433	rc = ipc_data_write_start(vfs_phone, pa, pa_len);	469	rc = ipc_data_write_start(vfs_phone, pa, pa_len);
434	if (rc != EOK) {	470	if (rc != EOK) {
435	async_wait_for(req, NULL);	471	async_wait_for(req, NULL);
436	async_serialize_end();	472	async_serialize_end();
437	futex_up(&vfs_phone_futex);	473	futex_up(&vfs_phone_futex);
438	free(pa);	474	free(pa);
439	return (int) rc;	475	return (int) rc;
440	}	476	}
441	async_wait_for(req, &rc);	477	async_wait_for(req, &rc);
442	async_serialize_end();	478	async_serialize_end();
443	futex_up(&vfs_phone_futex);	479	futex_up(&vfs_phone_futex);
444	free(pa);	480	free(pa);
445	return rc;	481	return rc;
446	}	482	}
447		483
448	int unlink(const char *path)	484	int unlink(const char *path)
449	{	485	{
450	return _unlink(path, L_NONE);	486	return _unlink(path, L_NONE);
451	}	487	}
452		488
453	int rmdir(const char *path)	489	int rmdir(const char *path)
454	{	490	{
455	return _unlink(path, L_DIRECTORY);	491	return _unlink(path, L_DIRECTORY);
456	}	492	}
457		493
458	int rename(const char old, const char new)	494	int rename(const char old, const char new)
459	{	495	{
460	int res;	496	int res;
461	ipcarg_t rc;	497	ipcarg_t rc;
462	aid_t req;	498	aid_t req;
463		499
464	size_t olda_len;	500	size_t olda_len;

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(root)/branches/dynload/uspace/lib/libc/generic/vfs/vfs.c – Rev 2927 → 3150