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);
 
    if (rc != EOK) return (int) rc;
    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 3150	Rev 3219
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 <ipc/devmap.h>
52	#include "../../srv/vfs/vfs.h"	52	#include "../../srv/vfs/vfs.h"
53		53
54	int vfs_phone = -1;	54	int vfs_phone = -1;
55	futex_t vfs_phone_futex = FUTEX_INITIALIZER;	55	futex_t vfs_phone_futex = FUTEX_INITIALIZER;
56		56
57	futex_t cwd_futex = FUTEX_INITIALIZER;	57	futex_t cwd_futex = FUTEX_INITIALIZER;
58	DIR *cwd_dir = NULL;	58	DIR *cwd_dir = NULL;
59	char *cwd_path = NULL;	59	char *cwd_path = NULL;
60	size_t cwd_len = 0;	60	size_t cwd_len = 0;
61		61
62	static char absolutize(const char path, size_t *retlen)	62	static char absolutize(const char path, size_t *retlen)
63	{	63	{
64	char *ncwd_path;	64	char *ncwd_path;
65		65
66	futex_down(&cwd_futex);	66	futex_down(&cwd_futex);
67	size_t len = strlen(path);	67	size_t len = strlen(path);
68	if (*path != '/') {	68	if (*path != '/') {
69	if (!cwd_path) {	69	if (!cwd_path) {
70	futex_up(&cwd_futex);	70	futex_up(&cwd_futex);
71	return NULL;	71	return NULL;
72	}	72	}
73	ncwd_path = malloc(len + cwd_len + 1);	73	ncwd_path = malloc(len + cwd_len + 1);
74	if (!ncwd_path) {	74	if (!ncwd_path) {
75	futex_up(&cwd_futex);	75	futex_up(&cwd_futex);
76	return NULL;	76	return NULL;
77	}	77	}
78	strcpy(ncwd_path, cwd_path);	78	strcpy(ncwd_path, cwd_path);
79	ncwd_path[cwd_len] = '/';	79	ncwd_path[cwd_len] = '/';
80	ncwd_path[cwd_len + 1] = '\0';	80	ncwd_path[cwd_len + 1] = '\0';
81	} else {	81	} else {
82	ncwd_path = malloc(len + 1);	82	ncwd_path = malloc(len + 1);
83	if (!ncwd_path) {	83	if (!ncwd_path) {
84	futex_up(&cwd_futex);	84	futex_up(&cwd_futex);
85	return NULL;	85	return NULL;
86	}	86	}
87	ncwd_path[0] = '\0';	87	ncwd_path[0] = '\0';
88	}	88	}
89	strcat(ncwd_path, path);	89	strcat(ncwd_path, path);
90	if (!canonify(ncwd_path, retlen)) {	90	if (!canonify(ncwd_path, retlen)) {
91	futex_up(&cwd_futex);	91	futex_up(&cwd_futex);
92	free(ncwd_path);	92	free(ncwd_path);
93	return NULL;	93	return NULL;
94	}	94	}
95	futex_up(&cwd_futex);	95	futex_up(&cwd_futex);
96	return ncwd_path;	96	return ncwd_path;
97	}	97	}
98		98
99	static int vfs_connect(void)	99	static int vfs_connect(void)
100	{	100	{
101	if (vfs_phone < 0)	101	if (vfs_phone < 0)
102	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);
103	return vfs_phone;	103	return vfs_phone;
104	}	104	}
105		105
106	static int device_get_handle(char name, dev_handle_t handle)	106	static int device_get_handle(char name, dev_handle_t handle)
107	{	107	{
108	int phone = ipc_connect_me_to(PHONE_NS, SERVICE_DEVMAP, DEVMAP_CLIENT, 0);	108	int phone = ipc_connect_me_to(PHONE_NS, SERVICE_DEVMAP, DEVMAP_CLIENT, 0);
109	if (phone < 0)	109	if (phone < 0)
110	return phone;	110	return phone;
111		111
112	ipc_call_t answer;	112	ipc_call_t answer;
113	aid_t req = async_send_2(phone, DEVMAP_DEVICE_GET_HANDLE, 0, 0,	113	aid_t req = async_send_2(phone, DEVMAP_DEVICE_GET_HANDLE, 0, 0,
114	&answer);	114	&answer);
115		115
116	ipcarg_t retval = ipc_data_write_start(phone, name, strlen(name) + 1);	116	ipcarg_t retval = ipc_data_write_start(phone, name, strlen(name) + 1);
117		117
118	if (retval != EOK) {	118	if (retval != EOK) {
119	async_wait_for(req, NULL);	119	async_wait_for(req, NULL);
120	ipc_hangup(phone);	120	ipc_hangup(phone);
121	return retval;	121	return retval;
122	}	122	}
123		123
124	async_wait_for(req, &retval);	124	async_wait_for(req, &retval);
125		125
126	if (handle != NULL)	126	if (handle != NULL)
127	*handle = -1;	127	*handle = -1;
128		128
129	if (retval == EOK) {	129	if (retval == EOK) {
130	if (handle != NULL)	130	if (handle != NULL)
131	*handle = (dev_handle_t) IPC_GET_ARG1(answer);	131	*handle = (dev_handle_t) IPC_GET_ARG1(answer);
132	}	132	}
133		133
134	ipc_hangup(phone);	134	ipc_hangup(phone);
135	return retval;	135	return retval;
136	}	136	}
137		137
138	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)
139	{	139	{
140	int res;	140	int res;
141	ipcarg_t rc;	141	ipcarg_t rc;
142	aid_t req;	142	aid_t req;
143	dev_handle_t dev_handle;	143	dev_handle_t dev_handle;
144		144
145	res = device_get_handle(dev, &dev_handle);	145	res = device_get_handle(dev, &dev_handle);
146	if (res != EOK)	146	if (res != EOK)
147	return res;	147	return res;
148		148
149	size_t mpa_len;	149	size_t mpa_len;
150	char *mpa = absolutize(mp, &mpa_len);	150	char *mpa = absolutize(mp, &mpa_len);
151	if (!mpa)	151	if (!mpa)
152	return ENOMEM;	152	return ENOMEM;
153		153
154	futex_down(&vfs_phone_futex);	154	futex_down(&vfs_phone_futex);
155	async_serialize_start();	155	async_serialize_start();
156	if (vfs_phone < 0) {	156	if (vfs_phone < 0) {
157	res = vfs_connect();	157	res = vfs_connect();
158	if (res < 0) {	158	if (res < 0) {
159	async_serialize_end();	159	async_serialize_end();
160	futex_up(&vfs_phone_futex);	160	futex_up(&vfs_phone_futex);
161	free(mpa);	161	free(mpa);
162	return res;	162	return res;
163	}	163	}
164	}	164	}
165	req = async_send_1(vfs_phone, VFS_MOUNT, dev_handle, NULL);	165	req = async_send_1(vfs_phone, VFS_MOUNT, dev_handle, NULL);
166	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));
167	if (rc != EOK) {	167	if (rc != EOK) {
168	async_wait_for(req, NULL);	168	async_wait_for(req, NULL);
169	async_serialize_end();	169	async_serialize_end();
170	futex_up(&vfs_phone_futex);	170	futex_up(&vfs_phone_futex);
171	free(mpa);	171	free(mpa);
172	return (int) rc;	172	return (int) rc;
173	}	173	}
174	rc = ipc_data_write_start(vfs_phone, (void *)mpa, mpa_len);	174	rc = ipc_data_write_start(vfs_phone, (void *)mpa, mpa_len);
175	if (rc != EOK) {	175	if (rc != EOK) {
176	async_wait_for(req, NULL);	176	async_wait_for(req, NULL);
177	async_serialize_end();	177	async_serialize_end();
178	futex_up(&vfs_phone_futex);	178	futex_up(&vfs_phone_futex);
179	free(mpa);	179	free(mpa);
180	return (int) rc;	180	return (int) rc;
181	}	181	}
182	async_wait_for(req, &rc);	182	async_wait_for(req, &rc);
183	async_serialize_end();	183	async_serialize_end();
184	futex_up(&vfs_phone_futex);	184	futex_up(&vfs_phone_futex);
185	free(mpa);	185	free(mpa);
186	return (int) rc;	186	return (int) rc;
187	}	187	}
188		188
189	static int _open(const char *path, int lflag, int oflag, ...)	189	static int _open(const char *path, int lflag, int oflag, ...)
190	{	190	{
191	int res;	191	int res;
192	ipcarg_t rc;	192	ipcarg_t rc;
193	ipc_call_t answer;	193	ipc_call_t answer;
194	aid_t req;	194	aid_t req;
195		195
196	size_t pa_len;	196	size_t pa_len;
197	char *pa = absolutize(path, &pa_len);	197	char *pa = absolutize(path, &pa_len);
198	if (!pa)	198	if (!pa)
199	return ENOMEM;	199	return ENOMEM;
200		200
201	futex_down(&vfs_phone_futex);	201	futex_down(&vfs_phone_futex);
202	async_serialize_start();	202	async_serialize_start();
203	if (vfs_phone < 0) {	203	if (vfs_phone < 0) {
204	res = vfs_connect();	204	res = vfs_connect();
205	if (res < 0) {	205	if (res < 0) {
206	async_serialize_end();	206	async_serialize_end();
207	futex_up(&vfs_phone_futex);	207	futex_up(&vfs_phone_futex);
208	free(pa);	208	free(pa);
209	return res;	209	return res;
210	}	210	}
211	}	211	}
212	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);
213	rc = ipc_data_write_start(vfs_phone, pa, pa_len);	213	rc = ipc_data_write_start(vfs_phone, pa, pa_len);
214	if (rc != EOK) {	214	if (rc != EOK) {
215	async_wait_for(req, NULL);	215	async_wait_for(req, NULL);
216	async_serialize_end();	216	async_serialize_end();
217	futex_up(&vfs_phone_futex);	217	futex_up(&vfs_phone_futex);
218	free(pa);	218	free(pa);
219	return (int) rc;	219	return (int) rc;
220	}	220	}
221	async_wait_for(req, &rc);	221	async_wait_for(req, &rc);
222	async_serialize_end();	222	async_serialize_end();
223	futex_up(&vfs_phone_futex);	223	futex_up(&vfs_phone_futex);
224	free(pa);	224	free(pa);
-		225
-		226	if (rc != EOK) return (int) rc;
225	return (int) IPC_GET_ARG1(answer);	227	return (int) IPC_GET_ARG1(answer);
226	}	228	}
227		229
228	int open(const char *path, int oflag, ...)	230	int open(const char *path, int oflag, ...)
229	{	231	{
230	return _open(path, L_FILE, oflag);	232	return _open(path, L_FILE, oflag);
231	}	233	}
232		234
233	int close(int fildes)	235	int close(int fildes)
234	{	236	{
235	int res;	237	int res;
236	ipcarg_t rc;	238	ipcarg_t rc;
237		239
238	futex_down(&vfs_phone_futex);	240	futex_down(&vfs_phone_futex);
239	async_serialize_start();	241	async_serialize_start();
240	if (vfs_phone < 0) {	242	if (vfs_phone < 0) {
241	res = vfs_connect();	243	res = vfs_connect();
242	if (res < 0) {	244	if (res < 0) {
243	async_serialize_end();	245	async_serialize_end();
244	futex_up(&vfs_phone_futex);	246	futex_up(&vfs_phone_futex);
245	return res;	247	return res;
246	}	248	}
247	}	249	}
248		250
249	rc = async_req_1_0(vfs_phone, VFS_CLOSE, fildes);	251	rc = async_req_1_0(vfs_phone, VFS_CLOSE, fildes);
250		252
251	async_serialize_end();	253	async_serialize_end();
252	futex_up(&vfs_phone_futex);	254	futex_up(&vfs_phone_futex);
253		255
254	return (int)rc;	256	return (int)rc;
255	}	257	}
256		258
257	ssize_t read(int fildes, void *buf, size_t nbyte)	259	ssize_t read(int fildes, void *buf, size_t nbyte)
258	{	260	{
259	int res;	261	int res;
260	ipcarg_t rc;	262	ipcarg_t rc;
261	ipc_call_t answer;	263	ipc_call_t answer;
262	aid_t req;	264	aid_t req;
263		265
264	futex_down(&vfs_phone_futex);	266	futex_down(&vfs_phone_futex);
265	async_serialize_start();	267	async_serialize_start();
266	if (vfs_phone < 0) {	268	if (vfs_phone < 0) {
267	res = vfs_connect();	269	res = vfs_connect();
268	if (res < 0) {	270	if (res < 0) {
269	async_serialize_end();	271	async_serialize_end();
270	futex_up(&vfs_phone_futex);	272	futex_up(&vfs_phone_futex);
271	return res;	273	return res;
272	}	274	}
273	}	275	}
274	req = async_send_1(vfs_phone, VFS_READ, fildes, &answer);	276	req = async_send_1(vfs_phone, VFS_READ, fildes, &answer);
275	rc = ipc_data_read_start(vfs_phone, (void *)buf, nbyte);	277	rc = ipc_data_read_start(vfs_phone, (void *)buf, nbyte);
276	if (rc != EOK) {	278	if (rc != EOK) {
277	async_wait_for(req, NULL);	279	async_wait_for(req, NULL);
278	async_serialize_end();	280	async_serialize_end();
279	futex_up(&vfs_phone_futex);	281	futex_up(&vfs_phone_futex);
280	return (ssize_t) rc;	282	return (ssize_t) rc;
281	}	283	}
282	async_wait_for(req, &rc);	284	async_wait_for(req, &rc);
283	async_serialize_end();	285	async_serialize_end();
284	futex_up(&vfs_phone_futex);	286	futex_up(&vfs_phone_futex);
285	if (rc == EOK)	287	if (rc == EOK)
286	return (ssize_t) IPC_GET_ARG1(answer);	288	return (ssize_t) IPC_GET_ARG1(answer);
287	else	289	else
288	return -1;	290	return -1;
289	}	291	}
290		292
291	ssize_t write(int fildes, const void *buf, size_t nbyte)	293	ssize_t write(int fildes, const void *buf, size_t nbyte)
292	{	294	{
293	int res;	295	int res;
294	ipcarg_t rc;	296	ipcarg_t rc;
295	ipc_call_t answer;	297	ipc_call_t answer;
296	aid_t req;	298	aid_t req;
297		299
298	futex_down(&vfs_phone_futex);	300	futex_down(&vfs_phone_futex);
299	async_serialize_start();	301	async_serialize_start();
300	if (vfs_phone < 0) {	302	if (vfs_phone < 0) {
301	res = vfs_connect();	303	res = vfs_connect();
302	if (res < 0) {	304	if (res < 0) {
303	async_serialize_end();	305	async_serialize_end();
304	futex_up(&vfs_phone_futex);	306	futex_up(&vfs_phone_futex);
305	return res;	307	return res;
306	}	308	}
307	}	309	}
308	req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer);	310	req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer);
309	rc = ipc_data_write_start(vfs_phone, (void *)buf, nbyte);	311	rc = ipc_data_write_start(vfs_phone, (void *)buf, nbyte);
310	if (rc != EOK) {	312	if (rc != EOK) {
311	async_wait_for(req, NULL);	313	async_wait_for(req, NULL);
312	async_serialize_end();	314	async_serialize_end();
313	futex_up(&vfs_phone_futex);	315	futex_up(&vfs_phone_futex);
314	return (ssize_t) rc;	316	return (ssize_t) rc;
315	}	317	}
316	async_wait_for(req, &rc);	318	async_wait_for(req, &rc);
317	async_serialize_end();	319	async_serialize_end();
318	futex_up(&vfs_phone_futex);	320	futex_up(&vfs_phone_futex);
319	if (rc == EOK)	321	if (rc == EOK)
320	return (ssize_t) IPC_GET_ARG1(answer);	322	return (ssize_t) IPC_GET_ARG1(answer);
321	else	323	else
322	return -1;	324	return -1;
323	}	325	}
324		326
325	off_t lseek(int fildes, off_t offset, int whence)	327	off_t lseek(int fildes, off_t offset, int whence)
326	{	328	{
327	int res;	329	int res;
328	ipcarg_t rc;	330	ipcarg_t rc;
329		331
330	futex_down(&vfs_phone_futex);	332	futex_down(&vfs_phone_futex);
331	async_serialize_start();	333	async_serialize_start();
332	if (vfs_phone < 0) {	334	if (vfs_phone < 0) {
333	res = vfs_connect();	335	res = vfs_connect();
334	if (res < 0) {	336	if (res < 0) {
335	async_serialize_end();	337	async_serialize_end();
336	futex_up(&vfs_phone_futex);	338	futex_up(&vfs_phone_futex);
337	return res;	339	return res;
338	}	340	}
339	}	341	}
340		342
341	off_t newoffs;	343	off_t newoffs;
342	rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence,	344	rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence,
343	(ipcarg_t)&newoffs);	345	(ipcarg_t)&newoffs);
344		346
345	async_serialize_end();	347	async_serialize_end();
346	futex_up(&vfs_phone_futex);	348	futex_up(&vfs_phone_futex);
347		349
348	if (rc != EOK)	350	if (rc != EOK)
349	return (off_t) -1;	351	return (off_t) -1;
350		352
351	return newoffs;	353	return newoffs;
352	}	354	}
353		355
354	int ftruncate(int fildes, off_t length)	356	int ftruncate(int fildes, off_t length)
355	{	357	{
356	int res;	358	int res;
357	ipcarg_t rc;	359	ipcarg_t rc;
358		360
359	futex_down(&vfs_phone_futex);	361	futex_down(&vfs_phone_futex);
360	async_serialize_start();	362	async_serialize_start();
361	if (vfs_phone < 0) {	363	if (vfs_phone < 0) {
362	res = vfs_connect();	364	res = vfs_connect();
363	if (res < 0) {	365	if (res < 0) {
364	async_serialize_end();	366	async_serialize_end();
365	futex_up(&vfs_phone_futex);	367	futex_up(&vfs_phone_futex);
366	return res;	368	return res;
367	}	369	}
368	}	370	}
369	rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length);	371	rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length);
370	async_serialize_end();	372	async_serialize_end();
371	futex_up(&vfs_phone_futex);	373	futex_up(&vfs_phone_futex);
372	return (int) rc;	374	return (int) rc;
373	}	375	}
374		376
375	DIR opendir(const char dirname)	377	DIR opendir(const char dirname)
376	{	378	{
377	DIR *dirp = malloc(sizeof(DIR));	379	DIR *dirp = malloc(sizeof(DIR));
378	if (!dirp)	380	if (!dirp)
379	return NULL;	381	return NULL;
380	dirp->fd = _open(dirname, L_DIRECTORY, 0);	382	dirp->fd = _open(dirname, L_DIRECTORY, 0);
381	if (dirp->fd < 0) {	383	if (dirp->fd < 0) {
382	free(dirp);	384	free(dirp);
383	return NULL;	385	return NULL;
384	}	386	}
385	return dirp;	387	return dirp;
386	}	388	}
387		389
388	struct dirent readdir(DIR dirp)	390	struct dirent readdir(DIR dirp)
389	{	391	{
390	ssize_t len = read(dirp->fd, &dirp->res.d_name[0], NAME_MAX + 1);	392	ssize_t len = read(dirp->fd, &dirp->res.d_name[0], NAME_MAX + 1);
391	if (len <= 0)	393	if (len <= 0)
392	return NULL;	394	return NULL;
393	return &dirp->res;	395	return &dirp->res;
394	}	396	}
395		397
396	void rewinddir(DIR *dirp)	398	void rewinddir(DIR *dirp)
397	{	399	{
398	(void) lseek(dirp->fd, 0, SEEK_SET);	400	(void) lseek(dirp->fd, 0, SEEK_SET);
399	}	401	}
400		402
401	int closedir(DIR *dirp)	403	int closedir(DIR *dirp)
402	{	404	{
403	(void) close(dirp->fd);	405	(void) close(dirp->fd);
404	free(dirp);	406	free(dirp);
405	return 0;	407	return 0;
406	}	408	}
407		409
408	int mkdir(const char *path, mode_t mode)	410	int mkdir(const char *path, mode_t mode)
409	{	411	{
410	int res;	412	int res;
411	ipcarg_t rc;	413	ipcarg_t rc;
412	aid_t req;	414	aid_t req;
413		415
414	size_t pa_len;	416	size_t pa_len;
415	char *pa = absolutize(path, &pa_len);	417	char *pa = absolutize(path, &pa_len);
416	if (!pa)	418	if (!pa)
417	return ENOMEM;	419	return ENOMEM;
418		420
419	futex_down(&vfs_phone_futex);	421	futex_down(&vfs_phone_futex);
420	async_serialize_start();	422	async_serialize_start();
421	if (vfs_phone < 0) {	423	if (vfs_phone < 0) {
422	res = vfs_connect();	424	res = vfs_connect();
423	if (res < 0) {	425	if (res < 0) {
424	async_serialize_end();	426	async_serialize_end();
425	futex_up(&vfs_phone_futex);	427	futex_up(&vfs_phone_futex);
426	free(pa);	428	free(pa);
427	return res;	429	return res;
428	}	430	}
429	}	431	}
430	req = async_send_1(vfs_phone, VFS_MKDIR, mode, NULL);	432	req = async_send_1(vfs_phone, VFS_MKDIR, mode, NULL);
431	rc = ipc_data_write_start(vfs_phone, pa, pa_len);	433	rc = ipc_data_write_start(vfs_phone, pa, pa_len);
432	if (rc != EOK) {	434	if (rc != EOK) {
433	async_wait_for(req, NULL);	435	async_wait_for(req, NULL);
434	async_serialize_end();	436	async_serialize_end();
435	futex_up(&vfs_phone_futex);	437	futex_up(&vfs_phone_futex);
436	free(pa);	438	free(pa);
437	return (int) rc;	439	return (int) rc;
438	}	440	}
439	async_wait_for(req, &rc);	441	async_wait_for(req, &rc);
440	async_serialize_end();	442	async_serialize_end();
441	futex_up(&vfs_phone_futex);	443	futex_up(&vfs_phone_futex);
442	free(pa);	444	free(pa);
443	return rc;	445	return rc;
444	}	446	}
445		447
446	static int _unlink(const char *path, int lflag)	448	static int _unlink(const char *path, int lflag)
447	{	449	{
448	int res;	450	int res;
449	ipcarg_t rc;	451	ipcarg_t rc;
450	aid_t req;	452	aid_t req;
451		453
452	size_t pa_len;	454	size_t pa_len;
453	char *pa = absolutize(path, &pa_len);	455	char *pa = absolutize(path, &pa_len);
454	if (!pa)	456	if (!pa)
455	return ENOMEM;	457	return ENOMEM;
456		458
457	futex_down(&vfs_phone_futex);	459	futex_down(&vfs_phone_futex);
458	async_serialize_start();	460	async_serialize_start();
459	if (vfs_phone < 0) {	461	if (vfs_phone < 0) {
460	res = vfs_connect();	462	res = vfs_connect();
461	if (res < 0) {	463	if (res < 0) {
462	async_serialize_end();	464	async_serialize_end();
463	futex_up(&vfs_phone_futex);	465	futex_up(&vfs_phone_futex);
464	free(pa);	466	free(pa);
465	return res;	467	return res;
466	}	468	}
467	}	469	}
468	req = async_send_0(vfs_phone, VFS_UNLINK, NULL);	470	req = async_send_0(vfs_phone, VFS_UNLINK, NULL);
469	rc = ipc_data_write_start(vfs_phone, pa, pa_len);	471	rc = ipc_data_write_start(vfs_phone, pa, pa_len);
470	if (rc != EOK) {	472	if (rc != EOK) {
471	async_wait_for(req, NULL);	473	async_wait_for(req, NULL);
472	async_serialize_end();	474	async_serialize_end();
473	futex_up(&vfs_phone_futex);	475	futex_up(&vfs_phone_futex);
474	free(pa);	476	free(pa);
475	return (int) rc;	477	return (int) rc;
476	}	478	}
477	async_wait_for(req, &rc);	479	async_wait_for(req, &rc);
478	async_serialize_end();	480	async_serialize_end();
479	futex_up(&vfs_phone_futex);	481	futex_up(&vfs_phone_futex);
480	free(pa);	482	free(pa);
481	return rc;	483	return rc;
482	}	484	}
483		485
484	int unlink(const char *path)	486	int unlink(const char *path)
485	{	487	{
486	return _unlink(path, L_NONE);	488	return _unlink(path, L_NONE);
487	}	489	}
488		490
489	int rmdir(const char *path)	491	int rmdir(const char *path)
490	{	492	{
491	return _unlink(path, L_DIRECTORY);	493	return _unlink(path, L_DIRECTORY);
492	}	494	}
493		495
494	int rename(const char old, const char new)	496	int rename(const char old, const char new)
495	{	497	{
496	int res;	498	int res;
497	ipcarg_t rc;	499	ipcarg_t rc;
498	aid_t req;	500	aid_t req;

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(root)/branches/dynload/uspace/lib/libc/generic/vfs/vfs.c – Rev 3150 → 3219