WebSVN – HelenOS – Diff – /trunk/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 3214	Rev 3246
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,
-		109	0);
109	if (phone < 0)	110	if (phone < 0)
110	return phone;	111	return phone;
111		112
112	ipc_call_t answer;	113	ipc_call_t answer;
113	aid_t req = async_send_2(phone, DEVMAP_DEVICE_GET_HANDLE, 0, 0,	114	aid_t req = async_send_2(phone, DEVMAP_DEVICE_GET_HANDLE, 0, 0,
114	&answer);	115	&answer);
115		116
116	ipcarg_t retval = ipc_data_write_start(phone, name, strlen(name) + 1);	117	ipcarg_t retval = ipc_data_write_start(phone, name, strlen(name) + 1);
117		118
118	if (retval != EOK) {	119	if (retval != EOK) {
119	async_wait_for(req, NULL);	120	async_wait_for(req, NULL);
120	ipc_hangup(phone);	121	ipc_hangup(phone);
121	return retval;	122	return retval;
122	}	123	}
123		124
124	async_wait_for(req, &retval);	125	async_wait_for(req, &retval);
125		126
126	if (handle != NULL)	127	if (handle != NULL)
127	*handle = -1;	128	*handle = -1;
128		129
129	if (retval == EOK) {	130	if (retval == EOK) {
130	if (handle != NULL)	131	if (handle != NULL)
131	*handle = (dev_handle_t) IPC_GET_ARG1(answer);	132	*handle = (dev_handle_t) IPC_GET_ARG1(answer);
132	}	133	}
133		134
134	ipc_hangup(phone);	135	ipc_hangup(phone);
135	return retval;	136	return retval;
136	}	137	}
137		138
138	int mount(const char fs_name, const char mp, const char *dev)	139	int mount(const char fs_name, const char mp, const char *dev)
139	{	140	{
140	int res;	141	int res;
141	ipcarg_t rc;	142	ipcarg_t rc;
142	aid_t req;	143	aid_t req;
143	dev_handle_t dev_handle;	144	dev_handle_t dev_handle;
144		145
145	res = device_get_handle(dev, &dev_handle);	146	res = device_get_handle(dev, &dev_handle);
146	if (res != EOK)	147	if (res != EOK)
147	return res;	148	return res;
148		149
149	size_t mpa_len;	150	size_t mpa_len;
150	char *mpa = absolutize(mp, &mpa_len);	151	char *mpa = absolutize(mp, &mpa_len);
151	if (!mpa)	152	if (!mpa)
152	return ENOMEM;	153	return ENOMEM;
153		154
154	futex_down(&vfs_phone_futex);	155	futex_down(&vfs_phone_futex);
155	async_serialize_start();	156	async_serialize_start();
156	if (vfs_phone < 0) {	157	if (vfs_phone < 0) {
157	res = vfs_connect();	158	res = vfs_connect();
158	if (res < 0) {	159	if (res < 0) {
159	async_serialize_end();	160	async_serialize_end();
160	futex_up(&vfs_phone_futex);	161	futex_up(&vfs_phone_futex);
161	free(mpa);	162	free(mpa);
162	return res;	163	return res;
163	}	164	}
164	}	165	}
165	req = async_send_1(vfs_phone, VFS_MOUNT, dev_handle, NULL);	166	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));	167	rc = ipc_data_write_start(vfs_phone, (void *)fs_name, strlen(fs_name));
167	if (rc != EOK) {	168	if (rc != EOK) {
168	async_wait_for(req, NULL);	169	async_wait_for(req, NULL);
169	async_serialize_end();	170	async_serialize_end();
170	futex_up(&vfs_phone_futex);	171	futex_up(&vfs_phone_futex);
171	free(mpa);	172	free(mpa);
172	return (int) rc;	173	return (int) rc;
173	}	174	}
174	rc = ipc_data_write_start(vfs_phone, (void *)mpa, mpa_len);	175	rc = ipc_data_write_start(vfs_phone, (void *)mpa, mpa_len);
175	if (rc != EOK) {	176	if (rc != EOK) {
176	async_wait_for(req, NULL);	177	async_wait_for(req, NULL);
177	async_serialize_end();	178	async_serialize_end();
178	futex_up(&vfs_phone_futex);	179	futex_up(&vfs_phone_futex);
179	free(mpa);	180	free(mpa);
180	return (int) rc;	181	return (int) rc;
181	}	182	}
182	async_wait_for(req, &rc);	183	async_wait_for(req, &rc);
183	async_serialize_end();	184	async_serialize_end();
184	futex_up(&vfs_phone_futex);	185	futex_up(&vfs_phone_futex);
185	free(mpa);	186	free(mpa);
186	return (int) rc;	187	return (int) rc;
187	}	188	}
188		189
189	static int _open(const char *path, int lflag, int oflag, ...)	190	static int _open(const char *path, int lflag, int oflag, ...)
190	{	191	{
191	int res;	192	int res;
192	ipcarg_t rc;	193	ipcarg_t rc;
193	ipc_call_t answer;	194	ipc_call_t answer;
194	aid_t req;	195	aid_t req;
195		196
196	size_t pa_len;	197	size_t pa_len;
197	char *pa = absolutize(path, &pa_len);	198	char *pa = absolutize(path, &pa_len);
198	if (!pa)	199	if (!pa)
199	return ENOMEM;	200	return ENOMEM;
200		201
201	futex_down(&vfs_phone_futex);	202	futex_down(&vfs_phone_futex);
202	async_serialize_start();	203	async_serialize_start();
203	if (vfs_phone < 0) {	204	if (vfs_phone < 0) {
204	res = vfs_connect();	205	res = vfs_connect();
205	if (res < 0) {	206	if (res < 0) {
206	async_serialize_end();	207	async_serialize_end();
207	futex_up(&vfs_phone_futex);	208	futex_up(&vfs_phone_futex);
208	free(pa);	209	free(pa);
209	return res;	210	return res;
210	}	211	}
211	}	212	}
212	req = async_send_3(vfs_phone, VFS_OPEN, lflag, oflag, 0, &answer);	213	req = async_send_3(vfs_phone, VFS_OPEN, lflag, oflag, 0, &answer);
213	rc = ipc_data_write_start(vfs_phone, pa, pa_len);	214	rc = ipc_data_write_start(vfs_phone, pa, pa_len);
214	if (rc != EOK) {	215	if (rc != EOK) {
215	async_wait_for(req, NULL);	216	async_wait_for(req, NULL);
216	async_serialize_end();	217	async_serialize_end();
217	futex_up(&vfs_phone_futex);	218	futex_up(&vfs_phone_futex);
218	free(pa);	219	free(pa);
219	return (int) rc;	220	return (int) rc;
220	}	221	}
221	async_wait_for(req, &rc);	222	async_wait_for(req, &rc);
222	async_serialize_end();	223	async_serialize_end();
223	futex_up(&vfs_phone_futex);	224	futex_up(&vfs_phone_futex);
224	free(pa);	225	free(pa);
225		226
-		227	if (rc != EOK)
226	if (rc != EOK) return (int) rc;	228	return (int) rc;
227	return (int) IPC_GET_ARG1(answer);	229	return (int) IPC_GET_ARG1(answer);
228	}	230	}
229		231
230	int open(const char *path, int oflag, ...)	232	int open(const char *path, int oflag, ...)
231	{	233	{
232	return _open(path, L_FILE, oflag);	234	return _open(path, L_FILE, oflag);
233	}	235	}
234		236
235	int close(int fildes)	237	int close(int fildes)
236	{	238	{
237	int res;	239	int res;
238	ipcarg_t rc;	240	ipcarg_t rc;
239		241
240	futex_down(&vfs_phone_futex);	242	futex_down(&vfs_phone_futex);
241	async_serialize_start();	243	async_serialize_start();
242	if (vfs_phone < 0) {	244	if (vfs_phone < 0) {
243	res = vfs_connect();	245	res = vfs_connect();
244	if (res < 0) {	246	if (res < 0) {
245	async_serialize_end();	247	async_serialize_end();
246	futex_up(&vfs_phone_futex);	248	futex_up(&vfs_phone_futex);
247	return res;	249	return res;
248	}	250	}
249	}	251	}
250		252
251	rc = async_req_1_0(vfs_phone, VFS_CLOSE, fildes);	253	rc = async_req_1_0(vfs_phone, VFS_CLOSE, fildes);
252		254
253	async_serialize_end();	255	async_serialize_end();
254	futex_up(&vfs_phone_futex);	256	futex_up(&vfs_phone_futex);
255		257
256	return (int)rc;	258	return (int)rc;
257	}	259	}
258		260
259	ssize_t read(int fildes, void *buf, size_t nbyte)	261	ssize_t read(int fildes, void *buf, size_t nbyte)
260	{	262	{
261	int res;	263	int res;
262	ipcarg_t rc;	264	ipcarg_t rc;
263	ipc_call_t answer;	265	ipc_call_t answer;
264	aid_t req;	266	aid_t req;
265		267
266	futex_down(&vfs_phone_futex);	268	futex_down(&vfs_phone_futex);
267	async_serialize_start();	269	async_serialize_start();
268	if (vfs_phone < 0) {	270	if (vfs_phone < 0) {
269	res = vfs_connect();	271	res = vfs_connect();
270	if (res < 0) {	272	if (res < 0) {
271	async_serialize_end();	273	async_serialize_end();
272	futex_up(&vfs_phone_futex);	274	futex_up(&vfs_phone_futex);
273	return res;	275	return res;
274	}	276	}
275	}	277	}
276	req = async_send_1(vfs_phone, VFS_READ, fildes, &answer);	278	req = async_send_1(vfs_phone, VFS_READ, fildes, &answer);
277	rc = ipc_data_read_start(vfs_phone, (void *)buf, nbyte);	279	rc = ipc_data_read_start(vfs_phone, (void *)buf, nbyte);
278	if (rc != EOK) {	280	if (rc != EOK) {
279	async_wait_for(req, NULL);	281	async_wait_for(req, NULL);
280	async_serialize_end();	282	async_serialize_end();
281	futex_up(&vfs_phone_futex);	283	futex_up(&vfs_phone_futex);
282	return (ssize_t) rc;	284	return (ssize_t) rc;
283	}	285	}
284	async_wait_for(req, &rc);	286	async_wait_for(req, &rc);
285	async_serialize_end();	287	async_serialize_end();
286	futex_up(&vfs_phone_futex);	288	futex_up(&vfs_phone_futex);
287	if (rc == EOK)	289	if (rc == EOK)
288	return (ssize_t) IPC_GET_ARG1(answer);	290	return (ssize_t) IPC_GET_ARG1(answer);
289	else	291	else
290	return -1;	292	return -1;
291	}	293	}
292		294
293	ssize_t write(int fildes, const void *buf, size_t nbyte)	295	ssize_t write(int fildes, const void *buf, size_t nbyte)
294	{	296	{
295	int res;	297	int res;
296	ipcarg_t rc;	298	ipcarg_t rc;
297	ipc_call_t answer;	299	ipc_call_t answer;
298	aid_t req;	300	aid_t req;
299		301
300	futex_down(&vfs_phone_futex);	302	futex_down(&vfs_phone_futex);
301	async_serialize_start();	303	async_serialize_start();
302	if (vfs_phone < 0) {	304	if (vfs_phone < 0) {
303	res = vfs_connect();	305	res = vfs_connect();
304	if (res < 0) {	306	if (res < 0) {
305	async_serialize_end();	307	async_serialize_end();
306	futex_up(&vfs_phone_futex);	308	futex_up(&vfs_phone_futex);
307	return res;	309	return res;
308	}	310	}
309	}	311	}
310	req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer);	312	req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer);
311	rc = ipc_data_write_start(vfs_phone, (void *)buf, nbyte);	313	rc = ipc_data_write_start(vfs_phone, (void *)buf, nbyte);
312	if (rc != EOK) {	314	if (rc != EOK) {
313	async_wait_for(req, NULL);	315	async_wait_for(req, NULL);
314	async_serialize_end();	316	async_serialize_end();
315	futex_up(&vfs_phone_futex);	317	futex_up(&vfs_phone_futex);
316	return (ssize_t) rc;	318	return (ssize_t) rc;
317	}	319	}
318	async_wait_for(req, &rc);	320	async_wait_for(req, &rc);
319	async_serialize_end();	321	async_serialize_end();
320	futex_up(&vfs_phone_futex);	322	futex_up(&vfs_phone_futex);
321	if (rc == EOK)	323	if (rc == EOK)
322	return (ssize_t) IPC_GET_ARG1(answer);	324	return (ssize_t) IPC_GET_ARG1(answer);
323	else	325	else
324	return -1;	326	return -1;
325	}	327	}
326		328
327	off_t lseek(int fildes, off_t offset, int whence)	329	off_t lseek(int fildes, off_t offset, int whence)
328	{	330	{
329	int res;	331	int res;
330	ipcarg_t rc;	332	ipcarg_t rc;
331		333
332	futex_down(&vfs_phone_futex);	334	futex_down(&vfs_phone_futex);
333	async_serialize_start();	335	async_serialize_start();
334	if (vfs_phone < 0) {	336	if (vfs_phone < 0) {
335	res = vfs_connect();	337	res = vfs_connect();
336	if (res < 0) {	338	if (res < 0) {
337	async_serialize_end();	339	async_serialize_end();
338	futex_up(&vfs_phone_futex);	340	futex_up(&vfs_phone_futex);
339	return res;	341	return res;
340	}	342	}
341	}	343	}
342		344
343	off_t newoffs;	345	off_t newoffs;
344	rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence,	346	rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence,
345	(ipcarg_t)&newoffs);	347	(ipcarg_t)&newoffs);
346		348
347	async_serialize_end();	349	async_serialize_end();
348	futex_up(&vfs_phone_futex);	350	futex_up(&vfs_phone_futex);
349		351
350	if (rc != EOK)	352	if (rc != EOK)
351	return (off_t) -1;	353	return (off_t) -1;
352		354
353	return newoffs;	355	return newoffs;
354	}	356	}
355		357
356	int ftruncate(int fildes, off_t length)	358	int ftruncate(int fildes, off_t length)
357	{	359	{
358	int res;	360	int res;
359	ipcarg_t rc;	361	ipcarg_t rc;
360		362
361	futex_down(&vfs_phone_futex);	363	futex_down(&vfs_phone_futex);
362	async_serialize_start();	364	async_serialize_start();
363	if (vfs_phone < 0) {	365	if (vfs_phone < 0) {
364	res = vfs_connect();	366	res = vfs_connect();
365	if (res < 0) {	367	if (res < 0) {
366	async_serialize_end();	368	async_serialize_end();
367	futex_up(&vfs_phone_futex);	369	futex_up(&vfs_phone_futex);
368	return res;	370	return res;
369	}	371	}
370	}	372	}
371	rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length);	373	rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length);
372	async_serialize_end();	374	async_serialize_end();
373	futex_up(&vfs_phone_futex);	375	futex_up(&vfs_phone_futex);
374	return (int) rc;	376	return (int) rc;
375	}	377	}
376		378
377	DIR opendir(const char dirname)	379	DIR opendir(const char dirname)
378	{	380	{
379	DIR *dirp = malloc(sizeof(DIR));	381	DIR *dirp = malloc(sizeof(DIR));
380	if (!dirp)	382	if (!dirp)
381	return NULL;	383	return NULL;
382	dirp->fd = _open(dirname, L_DIRECTORY, 0);	384	dirp->fd = _open(dirname, L_DIRECTORY, 0);
383	if (dirp->fd < 0) {	385	if (dirp->fd < 0) {
384	free(dirp);	386	free(dirp);
385	return NULL;	387	return NULL;
386	}	388	}
387	return dirp;	389	return dirp;
388	}	390	}
389		391
390	struct dirent readdir(DIR dirp)	392	struct dirent readdir(DIR dirp)
391	{	393	{
392	ssize_t len = read(dirp->fd, &dirp->res.d_name[0], NAME_MAX + 1);	394	ssize_t len = read(dirp->fd, &dirp->res.d_name[0], NAME_MAX + 1);
393	if (len <= 0)	395	if (len <= 0)
394	return NULL;	396	return NULL;
395	return &dirp->res;	397	return &dirp->res;
396	}	398	}
397		399
398	void rewinddir(DIR *dirp)	400	void rewinddir(DIR *dirp)
399	{	401	{
400	(void) lseek(dirp->fd, 0, SEEK_SET);	402	(void) lseek(dirp->fd, 0, SEEK_SET);
401	}	403	}
402		404
403	int closedir(DIR *dirp)	405	int closedir(DIR *dirp)
404	{	406	{
405	(void) close(dirp->fd);	407	(void) close(dirp->fd);
406	free(dirp);	408	free(dirp);
407	return 0;	409	return 0;
408	}	410	}
409		411
410	int mkdir(const char *path, mode_t mode)	412	int mkdir(const char *path, mode_t mode)
411	{	413	{
412	int res;	414	int res;
413	ipcarg_t rc;	415	ipcarg_t rc;
414	aid_t req;	416	aid_t req;
415		417
416	size_t pa_len;	418	size_t pa_len;
417	char *pa = absolutize(path, &pa_len);	419	char *pa = absolutize(path, &pa_len);
418	if (!pa)	420	if (!pa)
419	return ENOMEM;	421	return ENOMEM;
420		422
421	futex_down(&vfs_phone_futex);	423	futex_down(&vfs_phone_futex);
422	async_serialize_start();	424	async_serialize_start();
423	if (vfs_phone < 0) {	425	if (vfs_phone < 0) {
424	res = vfs_connect();	426	res = vfs_connect();
425	if (res < 0) {	427	if (res < 0) {
426	async_serialize_end();	428	async_serialize_end();
427	futex_up(&vfs_phone_futex);	429	futex_up(&vfs_phone_futex);
428	free(pa);	430	free(pa);
429	return res;	431	return res;
430	}	432	}
431	}	433	}
432	req = async_send_1(vfs_phone, VFS_MKDIR, mode, NULL);	434	req = async_send_1(vfs_phone, VFS_MKDIR, mode, NULL);
433	rc = ipc_data_write_start(vfs_phone, pa, pa_len);	435	rc = ipc_data_write_start(vfs_phone, pa, pa_len);
434	if (rc != EOK) {	436	if (rc != EOK) {
435	async_wait_for(req, NULL);	437	async_wait_for(req, NULL);
436	async_serialize_end();	438	async_serialize_end();
437	futex_up(&vfs_phone_futex);	439	futex_up(&vfs_phone_futex);
438	free(pa);	440	free(pa);
439	return (int) rc;	441	return (int) rc;
440	}	442	}
441	async_wait_for(req, &rc);	443	async_wait_for(req, &rc);
442	async_serialize_end();	444	async_serialize_end();
443	futex_up(&vfs_phone_futex);	445	futex_up(&vfs_phone_futex);
444	free(pa);	446	free(pa);
445	return rc;	447	return rc;
446	}	448	}
447		449
448	static int _unlink(const char *path, int lflag)	450	static int _unlink(const char *path, int lflag)
449	{	451	{
450	int res;	452	int res;
451	ipcarg_t rc;	453	ipcarg_t rc;
452	aid_t req;	454	aid_t req;
453		455
454	size_t pa_len;	456	size_t pa_len;
455	char *pa = absolutize(path, &pa_len);	457	char *pa = absolutize(path, &pa_len);
456	if (!pa)	458	if (!pa)
457	return ENOMEM;	459	return ENOMEM;
458		460
459	futex_down(&vfs_phone_futex);	461	futex_down(&vfs_phone_futex);
460	async_serialize_start();	462	async_serialize_start();
461	if (vfs_phone < 0) {	463	if (vfs_phone < 0) {
462	res = vfs_connect();	464	res = vfs_connect();
463	if (res < 0) {	465	if (res < 0) {
464	async_serialize_end();	466	async_serialize_end();
465	futex_up(&vfs_phone_futex);	467	futex_up(&vfs_phone_futex);
466	free(pa);	468	free(pa);
467	return res;	469	return res;
468	}	470	}
469	}	471	}
470	req = async_send_0(vfs_phone, VFS_UNLINK, NULL);	472	req = async_send_0(vfs_phone, VFS_UNLINK, NULL);
471	rc = ipc_data_write_start(vfs_phone, pa, pa_len);	473	rc = ipc_data_write_start(vfs_phone, pa, pa_len);
472	if (rc != EOK) {	474	if (rc != EOK) {
473	async_wait_for(req, NULL);	475	async_wait_for(req, NULL);
474	async_serialize_end();	476	async_serialize_end();
475	futex_up(&vfs_phone_futex);	477	futex_up(&vfs_phone_futex);
476	free(pa);	478	free(pa);
477	return (int) rc;	479	return (int) rc;
478	}	480	}
479	async_wait_for(req, &rc);	481	async_wait_for(req, &rc);
480	async_serialize_end();	482	async_serialize_end();
481	futex_up(&vfs_phone_futex);	483	futex_up(&vfs_phone_futex);
482	free(pa);	484	free(pa);
483	return rc;	485	return rc;
484	}	486	}
485		487
486	int unlink(const char *path)	488	int unlink(const char *path)
487	{	489	{
488	return _unlink(path, L_NONE);	490	return _unlink(path, L_NONE);
489	}	491	}
490		492
491	int rmdir(const char *path)	493	int rmdir(const char *path)
492	{	494	{
493	return _unlink(path, L_DIRECTORY);	495	return _unlink(path, L_DIRECTORY);
494	}	496	}
495		497
496	int rename(const char old, const char new)	498	int rename(const char old, const char new)
497	{	499	{
498	int res;	500	int res;

Subversion Repositories HelenOS

(root)/trunk/uspace/lib/libc/generic/vfs/vfs.c – Rev 3214 → 3246