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;
    }
    /* Ask VFS whether it likes fs_name. */
    rc = async_req_0_0(vfs_phone, IPC_M_PING);
    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 3246	Rev 3255
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,	108	int phone = ipc_connect_me_to(PHONE_NS, SERVICE_DEVMAP, DEVMAP_CLIENT,
109	0);	109	0);
110	if (phone < 0)	110	if (phone < 0)
111	return phone;	111	return phone;
112		112
113	ipc_call_t answer;	113	ipc_call_t answer;
114	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,
115	&answer);	115	&answer);
116		116
117	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);
118		118
119	if (retval != EOK) {	119	if (retval != EOK) {
120	async_wait_for(req, NULL);	120	async_wait_for(req, NULL);
121	ipc_hangup(phone);	121	ipc_hangup(phone);
122	return retval;	122	return retval;
123	}	123	}
124		124
125	async_wait_for(req, &retval);	125	async_wait_for(req, &retval);
126		126
127	if (handle != NULL)	127	if (handle != NULL)
128	*handle = -1;	128	*handle = -1;
129		129
130	if (retval == EOK) {	130	if (retval == EOK) {
131	if (handle != NULL)	131	if (handle != NULL)
132	*handle = (dev_handle_t) IPC_GET_ARG1(answer);	132	*handle = (dev_handle_t) IPC_GET_ARG1(answer);
133	}	133	}
134		134
135	ipc_hangup(phone);	135	ipc_hangup(phone);
136	return retval;	136	return retval;
137	}	137	}
138		138
139	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)
140	{	140	{
141	int res;	141	int res;
142	ipcarg_t rc;	142	ipcarg_t rc;
143	aid_t req;	143	aid_t req;
144	dev_handle_t dev_handle;	144	dev_handle_t dev_handle;
145		145
146	res = device_get_handle(dev, &dev_handle);	146	res = device_get_handle(dev, &dev_handle);
147	if (res != EOK)	147	if (res != EOK)
148	return res;	148	return res;
149		149
150	size_t mpa_len;	150	size_t mpa_len;
151	char *mpa = absolutize(mp, &mpa_len);	151	char *mpa = absolutize(mp, &mpa_len);
152	if (!mpa)	152	if (!mpa)
153	return ENOMEM;	153	return ENOMEM;
154		154
155	futex_down(&vfs_phone_futex);	155	futex_down(&vfs_phone_futex);
156	async_serialize_start();	156	async_serialize_start();
157	if (vfs_phone < 0) {	157	if (vfs_phone < 0) {
158	res = vfs_connect();	158	res = vfs_connect();
159	if (res < 0) {	159	if (res < 0) {
160	async_serialize_end();	160	async_serialize_end();
161	futex_up(&vfs_phone_futex);	161	futex_up(&vfs_phone_futex);
162	free(mpa);	162	free(mpa);
163	return res;	163	return res;
164	}	164	}
165	}	165	}
166	req = async_send_1(vfs_phone, VFS_MOUNT, dev_handle, NULL);	166	req = async_send_1(vfs_phone, VFS_MOUNT, dev_handle, NULL);
167	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));
168	if (rc != EOK) {	168	if (rc != EOK) {
169	async_wait_for(req, NULL);	169	async_wait_for(req, NULL);
170	async_serialize_end();	170	async_serialize_end();
171	futex_up(&vfs_phone_futex);	171	futex_up(&vfs_phone_futex);
172	free(mpa);	172	free(mpa);
173	return (int) rc;	173	return (int) rc;
174	}	174	}
-		175	/* Ask VFS whether it likes fs_name. */
-		176	rc = async_req_0_0(vfs_phone, IPC_M_PING);
-		177	if (rc != EOK) {
-		178	async_wait_for(req, NULL);
-		179	async_serialize_end();
-		180	futex_up(&vfs_phone_futex);
-		181	free(mpa);
-		182	return (int) rc;
-		183	}
175	rc = ipc_data_write_start(vfs_phone, (void *)mpa, mpa_len);	184	rc = ipc_data_write_start(vfs_phone, (void *)mpa, mpa_len);
176	if (rc != EOK) {	185	if (rc != EOK) {
177	async_wait_for(req, NULL);	186	async_wait_for(req, NULL);
178	async_serialize_end();	187	async_serialize_end();
179	futex_up(&vfs_phone_futex);	188	futex_up(&vfs_phone_futex);
180	free(mpa);	189	free(mpa);
181	return (int) rc;	190	return (int) rc;
182	}	191	}
183	async_wait_for(req, &rc);	192	async_wait_for(req, &rc);
184	async_serialize_end();	193	async_serialize_end();
185	futex_up(&vfs_phone_futex);	194	futex_up(&vfs_phone_futex);
186	free(mpa);	195	free(mpa);
187	return (int) rc;	196	return (int) rc;
188	}	197	}
189		198
190	static int _open(const char *path, int lflag, int oflag, ...)	199	static int _open(const char *path, int lflag, int oflag, ...)
191	{	200	{
192	int res;	201	int res;
193	ipcarg_t rc;	202	ipcarg_t rc;
194	ipc_call_t answer;	203	ipc_call_t answer;
195	aid_t req;	204	aid_t req;
196		205
197	size_t pa_len;	206	size_t pa_len;
198	char *pa = absolutize(path, &pa_len);	207	char *pa = absolutize(path, &pa_len);
199	if (!pa)	208	if (!pa)
200	return ENOMEM;	209	return ENOMEM;
201		210
202	futex_down(&vfs_phone_futex);	211	futex_down(&vfs_phone_futex);
203	async_serialize_start();	212	async_serialize_start();
204	if (vfs_phone < 0) {	213	if (vfs_phone < 0) {
205	res = vfs_connect();	214	res = vfs_connect();
206	if (res < 0) {	215	if (res < 0) {
207	async_serialize_end();	216	async_serialize_end();
208	futex_up(&vfs_phone_futex);	217	futex_up(&vfs_phone_futex);
209	free(pa);	218	free(pa);
210	return res;	219	return res;
211	}	220	}
212	}	221	}
213	req = async_send_3(vfs_phone, VFS_OPEN, lflag, oflag, 0, &answer);	222	req = async_send_3(vfs_phone, VFS_OPEN, lflag, oflag, 0, &answer);
214	rc = ipc_data_write_start(vfs_phone, pa, pa_len);	223	rc = ipc_data_write_start(vfs_phone, pa, pa_len);
215	if (rc != EOK) {	224	if (rc != EOK) {
216	async_wait_for(req, NULL);	225	async_wait_for(req, NULL);
217	async_serialize_end();	226	async_serialize_end();
218	futex_up(&vfs_phone_futex);	227	futex_up(&vfs_phone_futex);
219	free(pa);	228	free(pa);
220	return (int) rc;	229	return (int) rc;
221	}	230	}
222	async_wait_for(req, &rc);	231	async_wait_for(req, &rc);
223	async_serialize_end();	232	async_serialize_end();
224	futex_up(&vfs_phone_futex);	233	futex_up(&vfs_phone_futex);
225	free(pa);	234	free(pa);
226		235
227	if (rc != EOK)	236	if (rc != EOK)
228	return (int) rc;	237	return (int) rc;
229	return (int) IPC_GET_ARG1(answer);	238	return (int) IPC_GET_ARG1(answer);
230	}	239	}
231		240
232	int open(const char *path, int oflag, ...)	241	int open(const char *path, int oflag, ...)
233	{	242	{
234	return _open(path, L_FILE, oflag);	243	return _open(path, L_FILE, oflag);
235	}	244	}
236		245
237	int close(int fildes)	246	int close(int fildes)
238	{	247	{
239	int res;	248	int res;
240	ipcarg_t rc;	249	ipcarg_t rc;
241		250
242	futex_down(&vfs_phone_futex);	251	futex_down(&vfs_phone_futex);
243	async_serialize_start();	252	async_serialize_start();
244	if (vfs_phone < 0) {	253	if (vfs_phone < 0) {
245	res = vfs_connect();	254	res = vfs_connect();
246	if (res < 0) {	255	if (res < 0) {
247	async_serialize_end();	256	async_serialize_end();
248	futex_up(&vfs_phone_futex);	257	futex_up(&vfs_phone_futex);
249	return res;	258	return res;
250	}	259	}
251	}	260	}
252		261
253	rc = async_req_1_0(vfs_phone, VFS_CLOSE, fildes);	262	rc = async_req_1_0(vfs_phone, VFS_CLOSE, fildes);
254		263
255	async_serialize_end();	264	async_serialize_end();
256	futex_up(&vfs_phone_futex);	265	futex_up(&vfs_phone_futex);
257		266
258	return (int)rc;	267	return (int)rc;
259	}	268	}
260		269
261	ssize_t read(int fildes, void *buf, size_t nbyte)	270	ssize_t read(int fildes, void *buf, size_t nbyte)
262	{	271	{
263	int res;	272	int res;
264	ipcarg_t rc;	273	ipcarg_t rc;
265	ipc_call_t answer;	274	ipc_call_t answer;
266	aid_t req;	275	aid_t req;
267		276
268	futex_down(&vfs_phone_futex);	277	futex_down(&vfs_phone_futex);
269	async_serialize_start();	278	async_serialize_start();
270	if (vfs_phone < 0) {	279	if (vfs_phone < 0) {
271	res = vfs_connect();	280	res = vfs_connect();
272	if (res < 0) {	281	if (res < 0) {
273	async_serialize_end();	282	async_serialize_end();
274	futex_up(&vfs_phone_futex);	283	futex_up(&vfs_phone_futex);
275	return res;	284	return res;
276	}	285	}
277	}	286	}
278	req = async_send_1(vfs_phone, VFS_READ, fildes, &answer);	287	req = async_send_1(vfs_phone, VFS_READ, fildes, &answer);
279	rc = ipc_data_read_start(vfs_phone, (void *)buf, nbyte);	288	rc = ipc_data_read_start(vfs_phone, (void *)buf, nbyte);
280	if (rc != EOK) {	289	if (rc != EOK) {
281	async_wait_for(req, NULL);	290	async_wait_for(req, NULL);
282	async_serialize_end();	291	async_serialize_end();
283	futex_up(&vfs_phone_futex);	292	futex_up(&vfs_phone_futex);
284	return (ssize_t) rc;	293	return (ssize_t) rc;
285	}	294	}
286	async_wait_for(req, &rc);	295	async_wait_for(req, &rc);
287	async_serialize_end();	296	async_serialize_end();
288	futex_up(&vfs_phone_futex);	297	futex_up(&vfs_phone_futex);
289	if (rc == EOK)	298	if (rc == EOK)
290	return (ssize_t) IPC_GET_ARG1(answer);	299	return (ssize_t) IPC_GET_ARG1(answer);
291	else	300	else
292	return -1;	301	return -1;
293	}	302	}
294		303
295	ssize_t write(int fildes, const void *buf, size_t nbyte)	304	ssize_t write(int fildes, const void *buf, size_t nbyte)
296	{	305	{
297	int res;	306	int res;
298	ipcarg_t rc;	307	ipcarg_t rc;
299	ipc_call_t answer;	308	ipc_call_t answer;
300	aid_t req;	309	aid_t req;
301		310
302	futex_down(&vfs_phone_futex);	311	futex_down(&vfs_phone_futex);
303	async_serialize_start();	312	async_serialize_start();
304	if (vfs_phone < 0) {	313	if (vfs_phone < 0) {
305	res = vfs_connect();	314	res = vfs_connect();
306	if (res < 0) {	315	if (res < 0) {
307	async_serialize_end();	316	async_serialize_end();
308	futex_up(&vfs_phone_futex);	317	futex_up(&vfs_phone_futex);
309	return res;	318	return res;
310	}	319	}
311	}	320	}
312	req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer);	321	req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer);
313	rc = ipc_data_write_start(vfs_phone, (void *)buf, nbyte);	322	rc = ipc_data_write_start(vfs_phone, (void *)buf, nbyte);
314	if (rc != EOK) {	323	if (rc != EOK) {
315	async_wait_for(req, NULL);	324	async_wait_for(req, NULL);
316	async_serialize_end();	325	async_serialize_end();
317	futex_up(&vfs_phone_futex);	326	futex_up(&vfs_phone_futex);
318	return (ssize_t) rc;	327	return (ssize_t) rc;
319	}	328	}
320	async_wait_for(req, &rc);	329	async_wait_for(req, &rc);
321	async_serialize_end();	330	async_serialize_end();
322	futex_up(&vfs_phone_futex);	331	futex_up(&vfs_phone_futex);
323	if (rc == EOK)	332	if (rc == EOK)
324	return (ssize_t) IPC_GET_ARG1(answer);	333	return (ssize_t) IPC_GET_ARG1(answer);
325	else	334	else
326	return -1;	335	return -1;
327	}	336	}
328		337
329	off_t lseek(int fildes, off_t offset, int whence)	338	off_t lseek(int fildes, off_t offset, int whence)
330	{	339	{
331	int res;	340	int res;
332	ipcarg_t rc;	341	ipcarg_t rc;
333		342
334	futex_down(&vfs_phone_futex);	343	futex_down(&vfs_phone_futex);
335	async_serialize_start();	344	async_serialize_start();
336	if (vfs_phone < 0) {	345	if (vfs_phone < 0) {
337	res = vfs_connect();	346	res = vfs_connect();
338	if (res < 0) {	347	if (res < 0) {
339	async_serialize_end();	348	async_serialize_end();
340	futex_up(&vfs_phone_futex);	349	futex_up(&vfs_phone_futex);
341	return res;	350	return res;
342	}	351	}
343	}	352	}
344		353
345	off_t newoffs;	354	off_t newoffs;
346	rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence,	355	rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence,
347	(ipcarg_t)&newoffs);	356	(ipcarg_t)&newoffs);
348		357
349	async_serialize_end();	358	async_serialize_end();
350	futex_up(&vfs_phone_futex);	359	futex_up(&vfs_phone_futex);
351		360
352	if (rc != EOK)	361	if (rc != EOK)
353	return (off_t) -1;	362	return (off_t) -1;
354		363
355	return newoffs;	364	return newoffs;
356	}	365	}
357		366
358	int ftruncate(int fildes, off_t length)	367	int ftruncate(int fildes, off_t length)
359	{	368	{
360	int res;	369	int res;
361	ipcarg_t rc;	370	ipcarg_t rc;
362		371
363	futex_down(&vfs_phone_futex);	372	futex_down(&vfs_phone_futex);
364	async_serialize_start();	373	async_serialize_start();
365	if (vfs_phone < 0) {	374	if (vfs_phone < 0) {
366	res = vfs_connect();	375	res = vfs_connect();
367	if (res < 0) {	376	if (res < 0) {
368	async_serialize_end();	377	async_serialize_end();
369	futex_up(&vfs_phone_futex);	378	futex_up(&vfs_phone_futex);
370	return res;	379	return res;
371	}	380	}
372	}	381	}
373	rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length);	382	rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length);
374	async_serialize_end();	383	async_serialize_end();
375	futex_up(&vfs_phone_futex);	384	futex_up(&vfs_phone_futex);
376	return (int) rc;	385	return (int) rc;
377	}	386	}
378		387
379	DIR opendir(const char dirname)	388	DIR opendir(const char dirname)
380	{	389	{
381	DIR *dirp = malloc(sizeof(DIR));	390	DIR *dirp = malloc(sizeof(DIR));
382	if (!dirp)	391	if (!dirp)
383	return NULL;	392	return NULL;
384	dirp->fd = _open(dirname, L_DIRECTORY, 0);	393	dirp->fd = _open(dirname, L_DIRECTORY, 0);
385	if (dirp->fd < 0) {	394	if (dirp->fd < 0) {
386	free(dirp);	395	free(dirp);
387	return NULL;	396	return NULL;
388	}	397	}
389	return dirp;	398	return dirp;
390	}	399	}
391		400
392	struct dirent readdir(DIR dirp)	401	struct dirent readdir(DIR dirp)
393	{	402	{
394	ssize_t len = read(dirp->fd, &dirp->res.d_name[0], NAME_MAX + 1);	403	ssize_t len = read(dirp->fd, &dirp->res.d_name[0], NAME_MAX + 1);
395	if (len <= 0)	404	if (len <= 0)
396	return NULL;	405	return NULL;
397	return &dirp->res;	406	return &dirp->res;
398	}	407	}
399		408
400	void rewinddir(DIR *dirp)	409	void rewinddir(DIR *dirp)
401	{	410	{
402	(void) lseek(dirp->fd, 0, SEEK_SET);	411	(void) lseek(dirp->fd, 0, SEEK_SET);
403	}	412	}
404		413
405	int closedir(DIR *dirp)	414	int closedir(DIR *dirp)
406	{	415	{
407	(void) close(dirp->fd);	416	(void) close(dirp->fd);
408	free(dirp);	417	free(dirp);
409	return 0;	418	return 0;
410	}	419	}
411		420
412	int mkdir(const char *path, mode_t mode)	421	int mkdir(const char *path, mode_t mode)
413	{	422	{
414	int res;	423	int res;
415	ipcarg_t rc;	424	ipcarg_t rc;
416	aid_t req;	425	aid_t req;
417		426
418	size_t pa_len;	427	size_t pa_len;
419	char *pa = absolutize(path, &pa_len);	428	char *pa = absolutize(path, &pa_len);
420	if (!pa)	429	if (!pa)
421	return ENOMEM;	430	return ENOMEM;
422		431
423	futex_down(&vfs_phone_futex);	432	futex_down(&vfs_phone_futex);
424	async_serialize_start();	433	async_serialize_start();
425	if (vfs_phone < 0) {	434	if (vfs_phone < 0) {
426	res = vfs_connect();	435	res = vfs_connect();
427	if (res < 0) {	436	if (res < 0) {
428	async_serialize_end();	437	async_serialize_end();
429	futex_up(&vfs_phone_futex);	438	futex_up(&vfs_phone_futex);
430	free(pa);	439	free(pa);
431	return res;	440	return res;
432	}	441	}
433	}	442	}
434	req = async_send_1(vfs_phone, VFS_MKDIR, mode, NULL);	443	req = async_send_1(vfs_phone, VFS_MKDIR, mode, NULL);
435	rc = ipc_data_write_start(vfs_phone, pa, pa_len);	444	rc = ipc_data_write_start(vfs_phone, pa, pa_len);
436	if (rc != EOK) {	445	if (rc != EOK) {
437	async_wait_for(req, NULL);	446	async_wait_for(req, NULL);
438	async_serialize_end();	447	async_serialize_end();
439	futex_up(&vfs_phone_futex);	448	futex_up(&vfs_phone_futex);
440	free(pa);	449	free(pa);
441	return (int) rc;	450	return (int) rc;
442	}	451	}
443	async_wait_for(req, &rc);	452	async_wait_for(req, &rc);
444	async_serialize_end();	453	async_serialize_end();
445	futex_up(&vfs_phone_futex);	454	futex_up(&vfs_phone_futex);
446	free(pa);	455	free(pa);
447	return rc;	456	return rc;
448	}	457	}
449		458
450	static int _unlink(const char *path, int lflag)	459	static int _unlink(const char *path, int lflag)
451	{	460	{
452	int res;	461	int res;
453	ipcarg_t rc;	462	ipcarg_t rc;
454	aid_t req;	463	aid_t req;
455		464
456	size_t pa_len;	465	size_t pa_len;
457	char *pa = absolutize(path, &pa_len);	466	char *pa = absolutize(path, &pa_len);
458	if (!pa)	467	if (!pa)
459	return ENOMEM;	468	return ENOMEM;
460		469
461	futex_down(&vfs_phone_futex);	470	futex_down(&vfs_phone_futex);
462	async_serialize_start();	471	async_serialize_start();
463	if (vfs_phone < 0) {	472	if (vfs_phone < 0) {
464	res = vfs_connect();	473	res = vfs_connect();
465	if (res < 0) {	474	if (res < 0) {
466	async_serialize_end();	475	async_serialize_end();
467	futex_up(&vfs_phone_futex);	476	futex_up(&vfs_phone_futex);
468	free(pa);	477	free(pa);
469	return res;	478	return res;
470	}	479	}
471	}	480	}
472	req = async_send_0(vfs_phone, VFS_UNLINK, NULL);	481	req = async_send_0(vfs_phone, VFS_UNLINK, NULL);
473	rc = ipc_data_write_start(vfs_phone, pa, pa_len);	482	rc = ipc_data_write_start(vfs_phone, pa, pa_len);
474	if (rc != EOK) {	483	if (rc != EOK) {
475	async_wait_for(req, NULL);	484	async_wait_for(req, NULL);
476	async_serialize_end();	485	async_serialize_end();
477	futex_up(&vfs_phone_futex);	486	futex_up(&vfs_phone_futex);
478	free(pa);	487	free(pa);
479	return (int) rc;	488	return (int) rc;
480	}	489	}
481	async_wait_for(req, &rc);	490	async_wait_for(req, &rc);
482	async_serialize_end();	491	async_serialize_end();
483	futex_up(&vfs_phone_futex);	492	futex_up(&vfs_phone_futex);
484	free(pa);	493	free(pa);
485	return rc;	494	return rc;
486	}	495	}
487		496
488	int unlink(const char *path)	497	int unlink(const char *path)
489	{	498	{
490	return _unlink(path, L_NONE);	499	return _unlink(path, L_NONE);
491	}	500	}

Subversion Repositories HelenOS

(root)/trunk/uspace/lib/libc/generic/vfs/vfs.c – Rev 3246 → 3255