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


/*
 * Copyright (c) 2008 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
/** @addtogroup libc
 * @{
 */
/** @file
 */
 
#include <vfs/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_size = 0;
 
char *absolutize(const char *path, size_t *retlen)
{
    char *ncwd_path;
    char *ncwd_path_nc;
 
    futex_down(&cwd_futex);
    size_t size = str_size(path);
    if (*path != '/') {
        if (!cwd_path) {
            futex_up(&cwd_futex);
            return NULL;
        }
        ncwd_path_nc = malloc(cwd_size + 1 + size + 1);
        if (!ncwd_path_nc) {
            futex_up(&cwd_futex);
            return NULL;
        }
        str_cpy(ncwd_path_nc, cwd_size + 1 + size + 1, cwd_path);
        ncwd_path_nc[cwd_size] = '/';
        ncwd_path_nc[cwd_size + 1] = '\0';
    } else {
        ncwd_path_nc = malloc(size + 1);
        if (!ncwd_path_nc) {
            futex_up(&cwd_futex);
            return NULL;
        }
        ncwd_path_nc[0] = '\0';
    }
    str_append(ncwd_path_nc, cwd_size + 1 + size + 1, path);
    ncwd_path = canonify(ncwd_path_nc, retlen);
    if (!ncwd_path) {
        futex_up(&cwd_futex);
        free(ncwd_path_nc);
        return NULL;
    }
    /*
     * We need to clone ncwd_path because canonify() works in-place and thus
     * the address in ncwd_path need not be the same as ncwd_path_nc, even
     * though they both point into the same dynamically allocated buffer.
     */
    ncwd_path = str_dup(ncwd_path);
    free(ncwd_path_nc);
    if (!ncwd_path) {
        futex_up(&cwd_futex);
        return NULL;
    }
    futex_up(&cwd_futex);
    return ncwd_path;
}
 
static void vfs_connect(void)
{
    while (vfs_phone < 0)
        vfs_phone = ipc_connect_me_to_blocking(PHONE_NS, SERVICE_VFS, 0, 0);
}
 
static int device_get_handle(const char *name, dev_handle_t *handle,
    const unsigned int flags)
{
    int phone;
   
    if (flags & IPC_FLAG_BLOCKING)
        phone = ipc_connect_me_to_blocking(PHONE_NS, SERVICE_DEVMAP, DEVMAP_CLIENT, 0);
    else
        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, flags, 0,
        &answer);
   
    ipcarg_t retval = ipc_data_write_start(phone, name, str_size(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,
    const unsigned int flags)
{
    int res;
    ipcarg_t rc;
    aid_t req;
    dev_handle_t dev_handle;
   
    res = device_get_handle(dev, &dev_handle, flags);
    if (res != EOK)
        return res;
   
    size_t mpa_size;
    char *mpa = absolutize(mp, &mpa_size);
    if (!mpa)
        return ENOMEM;
   
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    req = async_send_2(vfs_phone, VFS_MOUNT, dev_handle, flags, NULL);
    rc = ipc_data_write_start(vfs_phone, (void *) mpa, mpa_size);
    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 *) fs_name, str_size(fs_name));
    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, ...)
{
    ipcarg_t rc;
    ipc_call_t answer;
    aid_t req;
   
    size_t pa_size;
    char *pa = absolutize(path, &pa_size);
    if (!pa)
        return ENOMEM;
   
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    req = async_send_3(vfs_phone, VFS_OPEN, lflag, oflag, 0, &answer);
    rc = ipc_data_write_start(vfs_phone, pa, pa_size);
    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)
{
    ipcarg_t rc;
   
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    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)
{
    ipcarg_t rc;
    ipc_call_t answer;
    aid_t req;
 
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    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 rc;
}
 
ssize_t write(int fildes, const void *buf, size_t nbyte)
{
    ipcarg_t rc;
    ipc_call_t answer;
    aid_t req;
 
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    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)
{
    ipcarg_t rc;
 
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    ipcarg_t newoffs;
    rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence,
        &newoffs);
 
    async_serialize_end();
    futex_up(&vfs_phone_futex);
 
    if (rc != EOK)
        return (off_t) -1;
   
    return (off_t) newoffs;
}
 
int ftruncate(int fildes, off_t length)
{
    ipcarg_t rc;
   
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    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)
{
    ipcarg_t rc;
    aid_t req;
   
    size_t pa_size;
    char *pa = absolutize(path, &pa_size);
    if (!pa)
        return ENOMEM;
   
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    req = async_send_1(vfs_phone, VFS_MKDIR, mode, NULL);
    rc = ipc_data_write_start(vfs_phone, pa, pa_size);
    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)
{
    ipcarg_t rc;
    aid_t req;
   
    size_t pa_size;
    char *pa = absolutize(path, &pa_size);
    if (!pa)
        return ENOMEM;
 
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    req = async_send_0(vfs_phone, VFS_UNLINK, NULL);
    rc = ipc_data_write_start(vfs_phone, pa, pa_size);
    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)
{
    ipcarg_t rc;
    aid_t req;
   
    size_t olda_size;
    char *olda = absolutize(old, &olda_size);
    if (!olda)
        return ENOMEM;
 
    size_t newa_size;
    char *newa = absolutize(new, &newa_size);
    if (!newa) {
        free(olda);
        return ENOMEM;
    }
 
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    req = async_send_0(vfs_phone, VFS_RENAME, NULL);
    rc = ipc_data_write_start(vfs_phone, olda, olda_size);
    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_size);
    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_size;
    char *pa = absolutize(path, &pa_size);
    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_size = 0;
    }
    cwd_dir = d;
    cwd_path = pa;
    cwd_size = pa_size;
    futex_up(&cwd_futex);
    return EOK;
}
 
char *getcwd(char *buf, size_t size)
{
    if (!size)
        return NULL;
    futex_down(&cwd_futex);
    if (size < cwd_size + 1) {
        futex_up(&cwd_futex);
        return NULL;
    }
    str_cpy(buf, size, cwd_path);
    futex_up(&cwd_futex);
    return buf;
}
 
/** @}
 */
 

Rev 4055	Rev 4296
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_size = 0;
61		61
62	char absolutize(const char path, size_t *retlen)	62	char absolutize(const char path, size_t *retlen)
63	{	63	{
64	char *ncwd_path;	64	char *ncwd_path;
65	char *ncwd_path_nc;	65	char *ncwd_path_nc;
66		66
67	futex_down(&cwd_futex);	67	futex_down(&cwd_futex);
68	size_t len = strlen(path);	68	size_t size = str_size(path);
69	if (*path != '/') {	69	if (*path != '/') {
70	if (!cwd_path) {	70	if (!cwd_path) {
71	futex_up(&cwd_futex);	71	futex_up(&cwd_futex);
72	return NULL;	72	return NULL;
73	}	73	}
74	ncwd_path_nc = malloc(cwd_len + 1 + len + 1);	74	ncwd_path_nc = malloc(cwd_size + 1 + size + 1);
75	if (!ncwd_path_nc) {	75	if (!ncwd_path_nc) {
76	futex_up(&cwd_futex);	76	futex_up(&cwd_futex);
77	return NULL;	77	return NULL;
78	}	78	}
79	strcpy(ncwd_path_nc, cwd_path);	79	str_cpy(ncwd_path_nc, cwd_size + 1 + size + 1, cwd_path);
80	ncwd_path_nc[cwd_len] = '/';	80	ncwd_path_nc[cwd_size] = '/';
81	ncwd_path_nc[cwd_len + 1] = '\0';	81	ncwd_path_nc[cwd_size + 1] = '\0';
82	} else {	82	} else {
83	ncwd_path_nc = malloc(len + 1);	83	ncwd_path_nc = malloc(size + 1);
84	if (!ncwd_path_nc) {	84	if (!ncwd_path_nc) {
85	futex_up(&cwd_futex);	85	futex_up(&cwd_futex);
86	return NULL;	86	return NULL;
87	}	87	}
88	ncwd_path_nc[0] = '\0';	88	ncwd_path_nc[0] = '\0';
89	}	89	}
90	strcat(ncwd_path_nc, path);	90	str_append(ncwd_path_nc, cwd_size + 1 + size + 1, path);
91	ncwd_path = canonify(ncwd_path_nc, retlen);	91	ncwd_path = canonify(ncwd_path_nc, retlen);
92	if (!ncwd_path) {	92	if (!ncwd_path) {
93	futex_up(&cwd_futex);	93	futex_up(&cwd_futex);
94	free(ncwd_path_nc);	94	free(ncwd_path_nc);
95	return NULL;	95	return NULL;
96	}	96	}
97	/*	97	/*
98	* We need to clone ncwd_path because canonify() works in-place and thus	98	* We need to clone ncwd_path because canonify() works in-place and thus
99	* the address in ncwd_path need not be the same as ncwd_path_nc, even	99	* the address in ncwd_path need not be the same as ncwd_path_nc, even
100	* though they both point into the same dynamically allocated buffer.	100	* though they both point into the same dynamically allocated buffer.
101	*/	101	*/
102	ncwd_path = strdup(ncwd_path);	102	ncwd_path = str_dup(ncwd_path);
103	free(ncwd_path_nc);	103	free(ncwd_path_nc);
104	if (!ncwd_path) {	104	if (!ncwd_path) {
105	futex_up(&cwd_futex);	105	futex_up(&cwd_futex);
106	return NULL;	106	return NULL;
107	}	107	}
108	futex_up(&cwd_futex);	108	futex_up(&cwd_futex);
109	return ncwd_path;	109	return ncwd_path;
110	}	110	}
111		111
112	static void vfs_connect(void)	112	static void vfs_connect(void)
113	{	113	{
114	while (vfs_phone < 0)	114	while (vfs_phone < 0)
115	vfs_phone = ipc_connect_me_to_blocking(PHONE_NS, SERVICE_VFS, 0, 0);	115	vfs_phone = ipc_connect_me_to_blocking(PHONE_NS, SERVICE_VFS, 0, 0);
116	}	116	}
117		117
118	static int device_get_handle(const char name, dev_handle_t handle,	118	static int device_get_handle(const char name, dev_handle_t handle,
119	const unsigned int flags)	119	const unsigned int flags)
120	{	120	{
121	int phone;	121	int phone;
122		122
123	if (flags & IPC_FLAG_BLOCKING)	123	if (flags & IPC_FLAG_BLOCKING)
124	phone = ipc_connect_me_to_blocking(PHONE_NS, SERVICE_DEVMAP, DEVMAP_CLIENT, 0);	124	phone = ipc_connect_me_to_blocking(PHONE_NS, SERVICE_DEVMAP, DEVMAP_CLIENT, 0);
125	else	125	else
126	phone = ipc_connect_me_to(PHONE_NS, SERVICE_DEVMAP, DEVMAP_CLIENT, 0);	126	phone = ipc_connect_me_to(PHONE_NS, SERVICE_DEVMAP, DEVMAP_CLIENT, 0);
127		127
128	if (phone < 0)	128	if (phone < 0)
129	return phone;	129	return phone;
130		130
131	ipc_call_t answer;	131	ipc_call_t answer;
132	aid_t req = async_send_2(phone, DEVMAP_DEVICE_GET_HANDLE, flags, 0,	132	aid_t req = async_send_2(phone, DEVMAP_DEVICE_GET_HANDLE, flags, 0,
133	&answer);	133	&answer);
134		134
135	ipcarg_t retval = ipc_data_write_start(phone, name, strlen(name) + 1);	135	ipcarg_t retval = ipc_data_write_start(phone, name, str_size(name) + 1);
136		136
137	if (retval != EOK) {	137	if (retval != EOK) {
138	async_wait_for(req, NULL);	138	async_wait_for(req, NULL);
139	ipc_hangup(phone);	139	ipc_hangup(phone);
140	return retval;	140	return retval;
141	}	141	}
142		142
143	async_wait_for(req, &retval);	143	async_wait_for(req, &retval);
144		144
145	if (handle != NULL)	145	if (handle != NULL)
146	*handle = -1;	146	*handle = -1;
147		147
148	if (retval == EOK) {	148	if (retval == EOK) {
149	if (handle != NULL)	149	if (handle != NULL)
150	*handle = (dev_handle_t) IPC_GET_ARG1(answer);	150	*handle = (dev_handle_t) IPC_GET_ARG1(answer);
151	}	151	}
152		152
153	ipc_hangup(phone);	153	ipc_hangup(phone);
154	return retval;	154	return retval;
155	}	155	}
156		156
157	int mount(const char fs_name, const char mp, const char *dev,	157	int mount(const char fs_name, const char mp, const char *dev,
158	const unsigned int flags)	158	const unsigned int flags)
159	{	159	{
160	int res;	160	int res;
161	ipcarg_t rc;	161	ipcarg_t rc;
162	aid_t req;	162	aid_t req;
163	dev_handle_t dev_handle;	163	dev_handle_t dev_handle;
164		164
165	res = device_get_handle(dev, &dev_handle, flags);	165	res = device_get_handle(dev, &dev_handle, flags);
166	if (res != EOK)	166	if (res != EOK)
167	return res;	167	return res;
168		168
169	size_t mpa_len;	169	size_t mpa_size;
170	char *mpa = absolutize(mp, &mpa_len);	170	char *mpa = absolutize(mp, &mpa_size);
171	if (!mpa)	171	if (!mpa)
172	return ENOMEM;	172	return ENOMEM;
173		173
174	futex_down(&vfs_phone_futex);	174	futex_down(&vfs_phone_futex);
175	async_serialize_start();	175	async_serialize_start();
176	vfs_connect();	176	vfs_connect();
177		177
178	req = async_send_2(vfs_phone, VFS_MOUNT, dev_handle, flags, NULL);	178	req = async_send_2(vfs_phone, VFS_MOUNT, dev_handle, flags, NULL);
179	rc = ipc_data_write_start(vfs_phone, (void *) mpa, mpa_len);	179	rc = ipc_data_write_start(vfs_phone, (void *) mpa, mpa_size);
180	if (rc != EOK) {	180	if (rc != EOK) {
181	async_wait_for(req, NULL);	181	async_wait_for(req, NULL);
182	async_serialize_end();	182	async_serialize_end();
183	futex_up(&vfs_phone_futex);	183	futex_up(&vfs_phone_futex);
184	free(mpa);	184	free(mpa);
185	return (int) rc;	185	return (int) rc;
186	}	186	}
187		187
188	rc = ipc_data_write_start(vfs_phone, (void *) fs_name, strlen(fs_name));	188	rc = ipc_data_write_start(vfs_phone, (void *) fs_name, str_size(fs_name));
189	if (rc != EOK) {	189	if (rc != EOK) {
190	async_wait_for(req, NULL);	190	async_wait_for(req, NULL);
191	async_serialize_end();	191	async_serialize_end();
192	futex_up(&vfs_phone_futex);	192	futex_up(&vfs_phone_futex);
193	free(mpa);	193	free(mpa);
194	return (int) rc;	194	return (int) rc;
195	}	195	}
196		196
197	async_wait_for(req, &rc);	197	async_wait_for(req, &rc);
198	async_serialize_end();	198	async_serialize_end();
199	futex_up(&vfs_phone_futex);	199	futex_up(&vfs_phone_futex);
200	free(mpa);	200	free(mpa);
201		201
202	return (int) rc;	202	return (int) rc;
203	}	203	}
204		204
205	static int _open(const char *path, int lflag, int oflag, ...)	205	static int _open(const char *path, int lflag, int oflag, ...)
206	{	206	{
207	ipcarg_t rc;	207	ipcarg_t rc;
208	ipc_call_t answer;	208	ipc_call_t answer;
209	aid_t req;	209	aid_t req;
210		210
211	size_t pa_len;	211	size_t pa_size;
212	char *pa = absolutize(path, &pa_len);	212	char *pa = absolutize(path, &pa_size);
213	if (!pa)	213	if (!pa)
214	return ENOMEM;	214	return ENOMEM;
215		215
216	futex_down(&vfs_phone_futex);	216	futex_down(&vfs_phone_futex);
217	async_serialize_start();	217	async_serialize_start();
218	vfs_connect();	218	vfs_connect();
219		219
220	req = async_send_3(vfs_phone, VFS_OPEN, lflag, oflag, 0, &answer);	220	req = async_send_3(vfs_phone, VFS_OPEN, lflag, oflag, 0, &answer);
221	rc = ipc_data_write_start(vfs_phone, pa, pa_len);	221	rc = ipc_data_write_start(vfs_phone, pa, pa_size);
222	if (rc != EOK) {	222	if (rc != EOK) {
223	async_wait_for(req, NULL);	223	async_wait_for(req, NULL);
224	async_serialize_end();	224	async_serialize_end();
225	futex_up(&vfs_phone_futex);	225	futex_up(&vfs_phone_futex);
226	free(pa);	226	free(pa);
227	return (int) rc;	227	return (int) rc;
228	}	228	}
229	async_wait_for(req, &rc);	229	async_wait_for(req, &rc);
230	async_serialize_end();	230	async_serialize_end();
231	futex_up(&vfs_phone_futex);	231	futex_up(&vfs_phone_futex);
232	free(pa);	232	free(pa);
233		233
234	if (rc != EOK)	234	if (rc != EOK)
235	return (int) rc;	235	return (int) rc;
236	return (int) IPC_GET_ARG1(answer);	236	return (int) IPC_GET_ARG1(answer);
237	}	237	}
238		238
239	int open(const char *path, int oflag, ...)	239	int open(const char *path, int oflag, ...)
240	{	240	{
241	return _open(path, L_FILE, oflag);	241	return _open(path, L_FILE, oflag);
242	}	242	}
243		243
244	int close(int fildes)	244	int close(int fildes)
245	{	245	{
246	ipcarg_t rc;	246	ipcarg_t rc;
247		247
248	futex_down(&vfs_phone_futex);	248	futex_down(&vfs_phone_futex);
249	async_serialize_start();	249	async_serialize_start();
250	vfs_connect();	250	vfs_connect();
251		251
252	rc = async_req_1_0(vfs_phone, VFS_CLOSE, fildes);	252	rc = async_req_1_0(vfs_phone, VFS_CLOSE, fildes);
253		253
254	async_serialize_end();	254	async_serialize_end();
255	futex_up(&vfs_phone_futex);	255	futex_up(&vfs_phone_futex);
256		256
257	return (int)rc;	257	return (int)rc;
258	}	258	}
259		259
260	ssize_t read(int fildes, void *buf, size_t nbyte)	260	ssize_t read(int fildes, void *buf, size_t nbyte)
261	{	261	{
262	ipcarg_t rc;	262	ipcarg_t rc;
263	ipc_call_t answer;	263	ipc_call_t answer;
264	aid_t req;	264	aid_t req;
265		265
266	futex_down(&vfs_phone_futex);	266	futex_down(&vfs_phone_futex);
267	async_serialize_start();	267	async_serialize_start();
268	vfs_connect();	268	vfs_connect();
269		269
270	req = async_send_1(vfs_phone, VFS_READ, fildes, &answer);	270	req = async_send_1(vfs_phone, VFS_READ, fildes, &answer);
271	rc = ipc_data_read_start(vfs_phone, (void *)buf, nbyte);	271	rc = ipc_data_read_start(vfs_phone, (void *)buf, nbyte);
272	if (rc != EOK) {	272	if (rc != EOK) {
273	async_wait_for(req, NULL);	273	async_wait_for(req, NULL);
274	async_serialize_end();	274	async_serialize_end();
275	futex_up(&vfs_phone_futex);	275	futex_up(&vfs_phone_futex);
276	return (ssize_t) rc;	276	return (ssize_t) rc;
277	}	277	}
278	async_wait_for(req, &rc);	278	async_wait_for(req, &rc);
279	async_serialize_end();	279	async_serialize_end();
280	futex_up(&vfs_phone_futex);	280	futex_up(&vfs_phone_futex);
281	if (rc == EOK)	281	if (rc == EOK)
282	return (ssize_t) IPC_GET_ARG1(answer);	282	return (ssize_t) IPC_GET_ARG1(answer);
283	else	283	else
284	return rc;	284	return rc;
285	}	285	}
286		286
287	ssize_t write(int fildes, const void *buf, size_t nbyte)	287	ssize_t write(int fildes, const void *buf, size_t nbyte)
288	{	288	{
289	ipcarg_t rc;	289	ipcarg_t rc;
290	ipc_call_t answer;	290	ipc_call_t answer;
291	aid_t req;	291	aid_t req;
292		292
293	futex_down(&vfs_phone_futex);	293	futex_down(&vfs_phone_futex);
294	async_serialize_start();	294	async_serialize_start();
295	vfs_connect();	295	vfs_connect();
296		296
297	req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer);	297	req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer);
298	rc = ipc_data_write_start(vfs_phone, (void *)buf, nbyte);	298	rc = ipc_data_write_start(vfs_phone, (void *)buf, nbyte);
299	if (rc != EOK) {	299	if (rc != EOK) {
300	async_wait_for(req, NULL);	300	async_wait_for(req, NULL);
301	async_serialize_end();	301	async_serialize_end();
302	futex_up(&vfs_phone_futex);	302	futex_up(&vfs_phone_futex);
303	return (ssize_t) rc;	303	return (ssize_t) rc;
304	}	304	}
305	async_wait_for(req, &rc);	305	async_wait_for(req, &rc);
306	async_serialize_end();	306	async_serialize_end();
307	futex_up(&vfs_phone_futex);	307	futex_up(&vfs_phone_futex);
308	if (rc == EOK)	308	if (rc == EOK)
309	return (ssize_t) IPC_GET_ARG1(answer);	309	return (ssize_t) IPC_GET_ARG1(answer);
310	else	310	else
311	return -1;	311	return -1;
312	}	312	}
313		313
314	off_t lseek(int fildes, off_t offset, int whence)	314	off_t lseek(int fildes, off_t offset, int whence)
315	{	315	{
316	ipcarg_t rc;	316	ipcarg_t rc;
317		317
318	futex_down(&vfs_phone_futex);	318	futex_down(&vfs_phone_futex);
319	async_serialize_start();	319	async_serialize_start();
320	vfs_connect();	320	vfs_connect();
321		321
322	ipcarg_t newoffs;	322	ipcarg_t newoffs;
323	rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence,	323	rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence,
324	&newoffs);	324	&newoffs);
325		325
326	async_serialize_end();	326	async_serialize_end();
327	futex_up(&vfs_phone_futex);	327	futex_up(&vfs_phone_futex);
328		328
329	if (rc != EOK)	329	if (rc != EOK)
330	return (off_t) -1;	330	return (off_t) -1;
331		331
332	return (off_t) newoffs;	332	return (off_t) newoffs;
333	}	333	}
334		334
335	int ftruncate(int fildes, off_t length)	335	int ftruncate(int fildes, off_t length)
336	{	336	{
337	ipcarg_t rc;	337	ipcarg_t rc;
338		338
339	futex_down(&vfs_phone_futex);	339	futex_down(&vfs_phone_futex);
340	async_serialize_start();	340	async_serialize_start();
341	vfs_connect();	341	vfs_connect();
342		342
343	rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length);	343	rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length);
344	async_serialize_end();	344	async_serialize_end();
345	futex_up(&vfs_phone_futex);	345	futex_up(&vfs_phone_futex);
346	return (int) rc;	346	return (int) rc;
347	}	347	}
348		348
349	DIR opendir(const char dirname)	349	DIR opendir(const char dirname)
350	{	350	{
351	DIR *dirp = malloc(sizeof(DIR));	351	DIR *dirp = malloc(sizeof(DIR));
352	if (!dirp)	352	if (!dirp)
353	return NULL;	353	return NULL;
354	dirp->fd = _open(dirname, L_DIRECTORY, 0);	354	dirp->fd = _open(dirname, L_DIRECTORY, 0);
355	if (dirp->fd < 0) {	355	if (dirp->fd < 0) {
356	free(dirp);	356	free(dirp);
357	return NULL;	357	return NULL;
358	}	358	}
359	return dirp;	359	return dirp;
360	}	360	}
361		361
362	struct dirent readdir(DIR dirp)	362	struct dirent readdir(DIR dirp)
363	{	363	{
364	ssize_t len = read(dirp->fd, &dirp->res.d_name[0], NAME_MAX + 1);	364	ssize_t len = read(dirp->fd, &dirp->res.d_name[0], NAME_MAX + 1);
365	if (len <= 0)	365	if (len <= 0)
366	return NULL;	366	return NULL;
367	return &dirp->res;	367	return &dirp->res;
368	}	368	}
369		369
370	void rewinddir(DIR *dirp)	370	void rewinddir(DIR *dirp)
371	{	371	{
372	(void) lseek(dirp->fd, 0, SEEK_SET);	372	(void) lseek(dirp->fd, 0, SEEK_SET);
373	}	373	}
374		374
375	int closedir(DIR *dirp)	375	int closedir(DIR *dirp)
376	{	376	{
377	(void) close(dirp->fd);	377	(void) close(dirp->fd);
378	free(dirp);	378	free(dirp);
379	return 0;	379	return 0;
380	}	380	}
381		381
382	int mkdir(const char *path, mode_t mode)	382	int mkdir(const char *path, mode_t mode)
383	{	383	{
384	ipcarg_t rc;	384	ipcarg_t rc;
385	aid_t req;	385	aid_t req;
386		386
387	size_t pa_len;	387	size_t pa_size;
388	char *pa = absolutize(path, &pa_len);	388	char *pa = absolutize(path, &pa_size);
389	if (!pa)	389	if (!pa)
390	return ENOMEM;	390	return ENOMEM;
391		391
392	futex_down(&vfs_phone_futex);	392	futex_down(&vfs_phone_futex);
393	async_serialize_start();	393	async_serialize_start();
394	vfs_connect();	394	vfs_connect();
395		395
396	req = async_send_1(vfs_phone, VFS_MKDIR, mode, NULL);	396	req = async_send_1(vfs_phone, VFS_MKDIR, mode, NULL);
397	rc = ipc_data_write_start(vfs_phone, pa, pa_len);	397	rc = ipc_data_write_start(vfs_phone, pa, pa_size);
398	if (rc != EOK) {	398	if (rc != EOK) {
399	async_wait_for(req, NULL);	399	async_wait_for(req, NULL);
400	async_serialize_end();	400	async_serialize_end();
401	futex_up(&vfs_phone_futex);	401	futex_up(&vfs_phone_futex);
402	free(pa);	402	free(pa);
403	return (int) rc;	403	return (int) rc;
404	}	404	}
405	async_wait_for(req, &rc);	405	async_wait_for(req, &rc);
406	async_serialize_end();	406	async_serialize_end();
407	futex_up(&vfs_phone_futex);	407	futex_up(&vfs_phone_futex);
408	free(pa);	408	free(pa);
409	return rc;	409	return rc;
410	}	410	}
411		411
412	static int _unlink(const char *path, int lflag)	412	static int _unlink(const char *path, int lflag)
413	{	413	{
414	ipcarg_t rc;	414	ipcarg_t rc;
415	aid_t req;	415	aid_t req;
416		416
417	size_t pa_len;	417	size_t pa_size;
418	char *pa = absolutize(path, &pa_len);	418	char *pa = absolutize(path, &pa_size);
419	if (!pa)	419	if (!pa)
420	return ENOMEM;	420	return ENOMEM;
421		421
422	futex_down(&vfs_phone_futex);	422	futex_down(&vfs_phone_futex);
423	async_serialize_start();	423	async_serialize_start();
424	vfs_connect();	424	vfs_connect();
425		425
426	req = async_send_0(vfs_phone, VFS_UNLINK, NULL);	426	req = async_send_0(vfs_phone, VFS_UNLINK, NULL);
427	rc = ipc_data_write_start(vfs_phone, pa, pa_len);	427	rc = ipc_data_write_start(vfs_phone, pa, pa_size);
428	if (rc != EOK) {	428	if (rc != EOK) {
429	async_wait_for(req, NULL);	429	async_wait_for(req, NULL);
430	async_serialize_end();	430	async_serialize_end();
431	futex_up(&vfs_phone_futex);	431	futex_up(&vfs_phone_futex);
432	free(pa);	432	free(pa);
433	return (int) rc;	433	return (int) rc;
434	}	434	}
435	async_wait_for(req, &rc);	435	async_wait_for(req, &rc);
436	async_serialize_end();	436	async_serialize_end();
437	futex_up(&vfs_phone_futex);	437	futex_up(&vfs_phone_futex);
438	free(pa);	438	free(pa);
439	return rc;	439	return rc;
440	}	440	}
441		441
442	int unlink(const char *path)	442	int unlink(const char *path)
443	{	443	{
444	return _unlink(path, L_NONE);	444	return _unlink(path, L_NONE);
445	}	445	}
446		446
447	int rmdir(const char *path)	447	int rmdir(const char *path)
448	{	448	{
449	return _unlink(path, L_DIRECTORY);	449	return _unlink(path, L_DIRECTORY);
450	}	450	}
451		451
452	int rename(const char old, const char new)	452	int rename(const char old, const char new)
453	{	453	{
454	ipcarg_t rc;	454	ipcarg_t rc;
455	aid_t req;	455	aid_t req;
456		456
457	size_t olda_len;	457	size_t olda_size;
458	char *olda = absolutize(old, &olda_len);	458	char *olda = absolutize(old, &olda_size);
459	if (!olda)	459	if (!olda)
460	return ENOMEM;	460	return ENOMEM;
461		461
462	size_t newa_len;	462	size_t newa_size;
463	char *newa = absolutize(new, &newa_len);	463	char *newa = absolutize(new, &newa_size);
464	if (!newa) {	464	if (!newa) {
465	free(olda);	465	free(olda);
466	return ENOMEM;	466	return ENOMEM;
467	}	467	}
468		468
469	futex_down(&vfs_phone_futex);	469	futex_down(&vfs_phone_futex);
470	async_serialize_start();	470	async_serialize_start();
471	vfs_connect();	471	vfs_connect();
472		472
473	req = async_send_0(vfs_phone, VFS_RENAME, NULL);	473	req = async_send_0(vfs_phone, VFS_RENAME, NULL);
474	rc = ipc_data_write_start(vfs_phone, olda, olda_len);	474	rc = ipc_data_write_start(vfs_phone, olda, olda_size);
475	if (rc != EOK) {	475	if (rc != EOK) {
476	async_wait_for(req, NULL);	476	async_wait_for(req, NULL);
477	async_serialize_end();	477	async_serialize_end();
478	futex_up(&vfs_phone_futex);	478	futex_up(&vfs_phone_futex);
479	free(olda);	479	free(olda);
480	free(newa);	480	free(newa);
481	return (int) rc;	481	return (int) rc;
482	}	482	}
483	rc = ipc_data_write_start(vfs_phone, newa, newa_len);	483	rc = ipc_data_write_start(vfs_phone, newa, newa_size);
484	if (rc != EOK) {	484	if (rc != EOK) {
485	async_wait_for(req, NULL);	485	async_wait_for(req, NULL);
486	async_serialize_end();	486	async_serialize_end();
487	futex_up(&vfs_phone_futex);	487	futex_up(&vfs_phone_futex);
488	free(olda);	488	free(olda);
489	free(newa);	489	free(newa);
490	return (int) rc;	490	return (int) rc;
491	}	491	}
492	async_wait_for(req, &rc);	492	async_wait_for(req, &rc);
493	async_serialize_end();	493	async_serialize_end();
494	futex_up(&vfs_phone_futex);	494	futex_up(&vfs_phone_futex);
495	free(olda);	495	free(olda);
496	free(newa);	496	free(newa);
497	return rc;	497	return rc;
498	}	498	}
499		499
500	int chdir(const char *path)	500	int chdir(const char *path)

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(root)/branches/dd/uspace/lib/libc/generic/vfs/vfs.c @ 4688 – Rev 4055 → 4296