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 <devmap.h>
#include <ipc/vfs.h>
#include <ipc/devmap.h>
 
static int vfs_phone = -1;
static futex_t vfs_phone_futex = FUTEX_INITIALIZER;
static 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);
}
 
int mount(const char *fs_name, const char *mp, const char *dev,
    const char *opts, unsigned int flags)
{
    int res;
    ipcarg_t rc;
    aid_t req;
    dev_handle_t dev_handle;
   
    res = devmap_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 *) opts, str_size(opts));
    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;
    }
 
    /* 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;
    }
   
    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 open_node(fdi_node_t *node, int oflag)
{
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    ipc_call_t answer;
    aid_t req = async_send_4(vfs_phone, VFS_OPEN_NODE, node->fs_handle,
        node->dev_handle, node->index, oflag, &answer);
   
    ipcarg_t rc;
    async_wait_for(req, &rc);
    async_serialize_end();
    futex_up(&vfs_phone_futex);
   
    if (rc != EOK)
        return (int) rc;
   
    return (int) IPC_GET_ARG1(answer);
}
 
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;
}
 
int fd_phone(int fildes)
{
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    ipcarg_t device;
    ipcarg_t rc = async_req_1_1(vfs_phone, VFS_DEVICE, fildes, &device);
   
    async_serialize_end();
    futex_up(&vfs_phone_futex);
   
    if (rc != EOK)
        return -1;
   
    return devmap_device_connect((dev_handle_t) device, 0);
}
 
void fd_node(int fildes, fdi_node_t *node)
{
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    ipcarg_t fs_handle;
    ipcarg_t dev_handle;
    ipcarg_t index;
    ipcarg_t rc = async_req_1_3(vfs_phone, VFS_NODE, fildes, &fs_handle,
        &dev_handle, &index);
   
    async_serialize_end();
    futex_up(&vfs_phone_futex);
   
    if (rc == EOK) {
        node->fs_handle = (fs_handle_t) fs_handle;
        node->dev_handle = (dev_handle_t) dev_handle;
        node->index = (fs_index_t) index;
    } else {
        node->fs_handle = 0;
        node->dev_handle = 0;
        node->index = 0;
    }
}
 
int fsync(int fildes)
{
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    ipcarg_t rc = async_req_1_0(vfs_phone, VFS_SYNC, fildes);
   
    async_serialize_end();
    futex_up(&vfs_phone_futex);
   
    return (int) rc;
}
 
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 4491	Rev 4492
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 <devmap.h>	51	#include <devmap.h>
52	#include <ipc/vfs.h>	52	#include <ipc/vfs.h>
53	#include <ipc/devmap.h>	53	#include <ipc/devmap.h>
54		54
55	static int vfs_phone = -1;	55	static int vfs_phone = -1;
56	static futex_t vfs_phone_futex = FUTEX_INITIALIZER;	56	static futex_t vfs_phone_futex = FUTEX_INITIALIZER;
57	static futex_t cwd_futex = FUTEX_INITIALIZER;	57	static futex_t cwd_futex = FUTEX_INITIALIZER;
58		58
59	DIR *cwd_dir = NULL;	59	DIR *cwd_dir = NULL;
60	char *cwd_path = NULL;	60	char *cwd_path = NULL;
61	size_t cwd_size = 0;	61	size_t cwd_size = 0;
62		62
63	char absolutize(const char path, size_t *retlen)	63	char absolutize(const char path, size_t *retlen)
64	{	64	{
65	char *ncwd_path;	65	char *ncwd_path;
66	char *ncwd_path_nc;	66	char *ncwd_path_nc;
67		67
68	futex_down(&cwd_futex);	68	futex_down(&cwd_futex);
69	size_t size = str_size(path);	69	size_t size = str_size(path);
70	if (*path != '/') {	70	if (*path != '/') {
71	if (!cwd_path) {	71	if (!cwd_path) {
72	futex_up(&cwd_futex);	72	futex_up(&cwd_futex);
73	return NULL;	73	return NULL;
74	}	74	}
75	ncwd_path_nc = malloc(cwd_size + 1 + size + 1);	75	ncwd_path_nc = malloc(cwd_size + 1 + size + 1);
76	if (!ncwd_path_nc) {	76	if (!ncwd_path_nc) {
77	futex_up(&cwd_futex);	77	futex_up(&cwd_futex);
78	return NULL;	78	return NULL;
79	}	79	}
80	str_cpy(ncwd_path_nc, cwd_size + 1 + size + 1, cwd_path);	80	str_cpy(ncwd_path_nc, cwd_size + 1 + size + 1, cwd_path);
81	ncwd_path_nc[cwd_size] = '/';	81	ncwd_path_nc[cwd_size] = '/';
82	ncwd_path_nc[cwd_size + 1] = '\0';	82	ncwd_path_nc[cwd_size + 1] = '\0';
83	} else {	83	} else {
84	ncwd_path_nc = malloc(size + 1);	84	ncwd_path_nc = malloc(size + 1);
85	if (!ncwd_path_nc) {	85	if (!ncwd_path_nc) {
86	futex_up(&cwd_futex);	86	futex_up(&cwd_futex);
87	return NULL;	87	return NULL;
88	}	88	}
89	ncwd_path_nc[0] = '\0';	89	ncwd_path_nc[0] = '\0';
90	}	90	}
91	str_append(ncwd_path_nc, cwd_size + 1 + size + 1, path);	91	str_append(ncwd_path_nc, cwd_size + 1 + size + 1, path);
92	ncwd_path = canonify(ncwd_path_nc, retlen);	92	ncwd_path = canonify(ncwd_path_nc, retlen);
93	if (!ncwd_path) {	93	if (!ncwd_path) {
94	futex_up(&cwd_futex);	94	futex_up(&cwd_futex);
95	free(ncwd_path_nc);	95	free(ncwd_path_nc);
96	return NULL;	96	return NULL;
97	}	97	}
98	/*	98	/*
99	* We need to clone ncwd_path because canonify() works in-place and thus	99	* We need to clone ncwd_path because canonify() works in-place and thus
100	* the address in ncwd_path need not be the same as ncwd_path_nc, even	100	* the address in ncwd_path need not be the same as ncwd_path_nc, even
101	* though they both point into the same dynamically allocated buffer.	101	* though they both point into the same dynamically allocated buffer.
102	*/	102	*/
103	ncwd_path = str_dup(ncwd_path);	103	ncwd_path = str_dup(ncwd_path);
104	free(ncwd_path_nc);	104	free(ncwd_path_nc);
105	if (!ncwd_path) {	105	if (!ncwd_path) {
106	futex_up(&cwd_futex);	106	futex_up(&cwd_futex);
107	return NULL;	107	return NULL;
108	}	108	}
109	futex_up(&cwd_futex);	109	futex_up(&cwd_futex);
110	return ncwd_path;	110	return ncwd_path;
111	}	111	}
112		112
113	static void vfs_connect(void)	113	static void vfs_connect(void)
114	{	114	{
115	while (vfs_phone < 0)	115	while (vfs_phone < 0)
116	vfs_phone = ipc_connect_me_to_blocking(PHONE_NS, SERVICE_VFS, 0, 0);	116	vfs_phone = ipc_connect_me_to_blocking(PHONE_NS, SERVICE_VFS, 0, 0);
117	}	117	}
118		118
119	int mount(const char fs_name, const char mp, const char *dev,	119	int mount(const char fs_name, const char mp, const char *dev,
120	const char *opts, unsigned int flags)	120	const char *opts, unsigned int flags)
121	{	121	{
122	int res;	122	int res;
123	ipcarg_t rc;	123	ipcarg_t rc;
124	aid_t req;	124	aid_t req;
125	dev_handle_t dev_handle;	125	dev_handle_t dev_handle;
126		126
127	res = devmap_device_get_handle(dev, &dev_handle, flags);	127	res = devmap_device_get_handle(dev, &dev_handle, flags);
128	if (res != EOK)	128	if (res != EOK)
129	return res;	129	return res;
130		130
131	size_t mpa_size;	131	size_t mpa_size;
132	char *mpa = absolutize(mp, &mpa_size);	132	char *mpa = absolutize(mp, &mpa_size);
133	if (!mpa)	133	if (!mpa)
134	return ENOMEM;	134	return ENOMEM;
135		135
136	futex_down(&vfs_phone_futex);	136	futex_down(&vfs_phone_futex);
137	async_serialize_start();	137	async_serialize_start();
138	vfs_connect();	138	vfs_connect();
139		139
140	req = async_send_2(vfs_phone, VFS_MOUNT, dev_handle, flags, NULL);	140	req = async_send_2(vfs_phone, VFS_MOUNT, dev_handle, flags, NULL);
141	rc = ipc_data_write_start(vfs_phone, (void *) mpa, mpa_size);	141	rc = ipc_data_write_start(vfs_phone, (void *) mpa, mpa_size);
142	if (rc != EOK) {	142	if (rc != EOK) {
143	async_wait_for(req, NULL);	143	async_wait_for(req, NULL);
144	async_serialize_end();	144	async_serialize_end();
145	futex_up(&vfs_phone_futex);	145	futex_up(&vfs_phone_futex);
146	free(mpa);	146	free(mpa);
147	return (int) rc;	147	return (int) rc;
148	}	148	}
149		149
150	rc = ipc_data_write_start(vfs_phone, (void *) opts, str_size(opts));	150	rc = ipc_data_write_start(vfs_phone, (void *) opts, str_size(opts));
151	if (rc != EOK) {	151	if (rc != EOK) {
152	async_wait_for(req, NULL);	152	async_wait_for(req, NULL);
153	async_serialize_end();	153	async_serialize_end();
154	futex_up(&vfs_phone_futex);	154	futex_up(&vfs_phone_futex);
155	free(mpa);	155	free(mpa);
156	return (int) rc;	156	return (int) rc;
157	}	157	}
158		158
159	rc = ipc_data_write_start(vfs_phone, (void *) fs_name, str_size(fs_name));	159	rc = ipc_data_write_start(vfs_phone, (void *) fs_name, str_size(fs_name));
160	if (rc != EOK) {	160	if (rc != EOK) {
161	async_wait_for(req, NULL);	161	async_wait_for(req, NULL);
162	async_serialize_end();	162	async_serialize_end();
163	futex_up(&vfs_phone_futex);	163	futex_up(&vfs_phone_futex);
164	free(mpa);	164	free(mpa);
165	return (int) rc;	165	return (int) rc;
166	}	166	}
167		167
168	/* Ask VFS whether it likes fs_name. */	168	/* Ask VFS whether it likes fs_name. */
169	rc = async_req_0_0(vfs_phone, IPC_M_PING);	169	rc = async_req_0_0(vfs_phone, IPC_M_PING);
170	if (rc != EOK) {	170	if (rc != EOK) {
171	async_wait_for(req, NULL);	171	async_wait_for(req, NULL);
172	async_serialize_end();	172	async_serialize_end();
173	futex_up(&vfs_phone_futex);	173	futex_up(&vfs_phone_futex);
174	free(mpa);	174	free(mpa);
175	return (int) rc;	175	return (int) rc;
176	}	176	}
177		177
178	async_wait_for(req, &rc);	178	async_wait_for(req, &rc);
179	async_serialize_end();	179	async_serialize_end();
180	futex_up(&vfs_phone_futex);	180	futex_up(&vfs_phone_futex);
181	free(mpa);	181	free(mpa);
182		182
183	return (int) rc;	183	return (int) rc;
184	}	184	}
185		185
186	static int _open(const char *path, int lflag, int oflag, ...)	186	static int _open(const char *path, int lflag, int oflag, ...)
187	{	187	{
188	ipcarg_t rc;	188	ipcarg_t rc;
189	ipc_call_t answer;	189	ipc_call_t answer;
190	aid_t req;	190	aid_t req;
191		191
192	size_t pa_size;	192	size_t pa_size;
193	char *pa = absolutize(path, &pa_size);	193	char *pa = absolutize(path, &pa_size);
194	if (!pa)	194	if (!pa)
195	return ENOMEM;	195	return ENOMEM;
196		196
197	futex_down(&vfs_phone_futex);	197	futex_down(&vfs_phone_futex);
198	async_serialize_start();	198	async_serialize_start();
199	vfs_connect();	199	vfs_connect();
200		200
201	req = async_send_3(vfs_phone, VFS_OPEN, lflag, oflag, 0, &answer);	201	req = async_send_3(vfs_phone, VFS_OPEN, lflag, oflag, 0, &answer);
202	rc = ipc_data_write_start(vfs_phone, pa, pa_size);	202	rc = ipc_data_write_start(vfs_phone, pa, pa_size);
203	if (rc != EOK) {	203	if (rc != EOK) {
204	async_wait_for(req, NULL);	204	async_wait_for(req, NULL);
205	async_serialize_end();	205	async_serialize_end();
206	futex_up(&vfs_phone_futex);	206	futex_up(&vfs_phone_futex);
207	free(pa);	207	free(pa);
208	return (int) rc;	208	return (int) rc;
209	}	209	}
210	async_wait_for(req, &rc);	210	async_wait_for(req, &rc);
211	async_serialize_end();	211	async_serialize_end();
212	futex_up(&vfs_phone_futex);	212	futex_up(&vfs_phone_futex);
213	free(pa);	213	free(pa);
214		214
215	if (rc != EOK)	215	if (rc != EOK)
216	return (int) rc;	216	return (int) rc;
217		217
218	return (int) IPC_GET_ARG1(answer);	218	return (int) IPC_GET_ARG1(answer);
219	}	219	}
220		220
221	int open(const char *path, int oflag, ...)	221	int open(const char *path, int oflag, ...)
222	{	222	{
223	return _open(path, L_FILE, oflag);	223	return _open(path, L_FILE, oflag);
224	}	224	}
225		225
226	int open_node(inode_t *node, int oflag)	226	int open_node(fdi_node_t *node, int oflag)
227	{	227	{
228	futex_down(&vfs_phone_futex);	228	futex_down(&vfs_phone_futex);
229	async_serialize_start();	229	async_serialize_start();
230	vfs_connect();	230	vfs_connect();
231		231
232	ipc_call_t answer;	232	ipc_call_t answer;
233	aid_t req = async_send_4(vfs_phone, VFS_OPEN_NODE, node->fs_handle,	233	aid_t req = async_send_4(vfs_phone, VFS_OPEN_NODE, node->fs_handle,
234	node->dev_handle, node->index, oflag, &answer);	234	node->dev_handle, node->index, oflag, &answer);
235		235
236	ipcarg_t rc;	236	ipcarg_t rc;
237	async_wait_for(req, &rc);	237	async_wait_for(req, &rc);
238	async_serialize_end();	238	async_serialize_end();
239	futex_up(&vfs_phone_futex);	239	futex_up(&vfs_phone_futex);
240		240
241	if (rc != EOK)	241	if (rc != EOK)
242	return (int) rc;	242	return (int) rc;
243		243
244	return (int) IPC_GET_ARG1(answer);	244	return (int) IPC_GET_ARG1(answer);
245	}	245	}
246		246
247	int close(int fildes)	247	int close(int fildes)
248	{	248	{
249	ipcarg_t rc;	249	ipcarg_t rc;
250		250
251	futex_down(&vfs_phone_futex);	251	futex_down(&vfs_phone_futex);
252	async_serialize_start();	252	async_serialize_start();
253	vfs_connect();	253	vfs_connect();
254		254
255	rc = async_req_1_0(vfs_phone, VFS_CLOSE, fildes);	255	rc = async_req_1_0(vfs_phone, VFS_CLOSE, fildes);
256		256
257	async_serialize_end();	257	async_serialize_end();
258	futex_up(&vfs_phone_futex);	258	futex_up(&vfs_phone_futex);
259		259
260	return (int)rc;	260	return (int)rc;
261	}	261	}
262		262
263	ssize_t read(int fildes, void *buf, size_t nbyte)	263	ssize_t read(int fildes, void *buf, size_t nbyte)
264	{	264	{
265	ipcarg_t rc;	265	ipcarg_t rc;
266	ipc_call_t answer;	266	ipc_call_t answer;
267	aid_t req;	267	aid_t req;
268		268
269	futex_down(&vfs_phone_futex);	269	futex_down(&vfs_phone_futex);
270	async_serialize_start();	270	async_serialize_start();
271	vfs_connect();	271	vfs_connect();
272		272
273	req = async_send_1(vfs_phone, VFS_READ, fildes, &answer);	273	req = async_send_1(vfs_phone, VFS_READ, fildes, &answer);
274	rc = ipc_data_read_start(vfs_phone, (void *)buf, nbyte);	274	rc = ipc_data_read_start(vfs_phone, (void *)buf, nbyte);
275	if (rc != EOK) {	275	if (rc != EOK) {
276	async_wait_for(req, NULL);	276	async_wait_for(req, NULL);
277	async_serialize_end();	277	async_serialize_end();
278	futex_up(&vfs_phone_futex);	278	futex_up(&vfs_phone_futex);
279	return (ssize_t) rc;	279	return (ssize_t) rc;
280	}	280	}
281	async_wait_for(req, &rc);	281	async_wait_for(req, &rc);
282	async_serialize_end();	282	async_serialize_end();
283	futex_up(&vfs_phone_futex);	283	futex_up(&vfs_phone_futex);
284	if (rc == EOK)	284	if (rc == EOK)
285	return (ssize_t) IPC_GET_ARG1(answer);	285	return (ssize_t) IPC_GET_ARG1(answer);
286	else	286	else
287	return rc;	287	return rc;
288	}	288	}
289		289
290	ssize_t write(int fildes, const void *buf, size_t nbyte)	290	ssize_t write(int fildes, const void *buf, size_t nbyte)
291	{	291	{
292	ipcarg_t rc;	292	ipcarg_t rc;
293	ipc_call_t answer;	293	ipc_call_t answer;
294	aid_t req;	294	aid_t req;
295		295
296	futex_down(&vfs_phone_futex);	296	futex_down(&vfs_phone_futex);
297	async_serialize_start();	297	async_serialize_start();
298	vfs_connect();	298	vfs_connect();
299		299
300	req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer);	300	req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer);
301	rc = ipc_data_write_start(vfs_phone, (void *)buf, nbyte);	301	rc = ipc_data_write_start(vfs_phone, (void *)buf, nbyte);
302	if (rc != EOK) {	302	if (rc != EOK) {
303	async_wait_for(req, NULL);	303	async_wait_for(req, NULL);
304	async_serialize_end();	304	async_serialize_end();
305	futex_up(&vfs_phone_futex);	305	futex_up(&vfs_phone_futex);
306	return (ssize_t) rc;	306	return (ssize_t) rc;
307	}	307	}
308	async_wait_for(req, &rc);	308	async_wait_for(req, &rc);
309	async_serialize_end();	309	async_serialize_end();
310	futex_up(&vfs_phone_futex);	310	futex_up(&vfs_phone_futex);
311	if (rc == EOK)	311	if (rc == EOK)
312	return (ssize_t) IPC_GET_ARG1(answer);	312	return (ssize_t) IPC_GET_ARG1(answer);
313	else	313	else
314	return -1;	314	return -1;
315	}	315	}
316		316
317	int fd_phone(int fildes)	317	int fd_phone(int fildes)
318	{	318	{
319	futex_down(&vfs_phone_futex);	319	futex_down(&vfs_phone_futex);
320	async_serialize_start();	320	async_serialize_start();
321	vfs_connect();	321	vfs_connect();
322		322
323	ipcarg_t device;	323	ipcarg_t device;
324	ipcarg_t rc = async_req_1_1(vfs_phone, VFS_DEVICE, fildes, &device);	324	ipcarg_t rc = async_req_1_1(vfs_phone, VFS_DEVICE, fildes, &device);
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 -1;	330	return -1;
331		331
332	return devmap_device_connect((dev_handle_t) device, 0);	332	return devmap_device_connect((dev_handle_t) device, 0);
333	}	333	}
334		334
335	void fd_node(int fildes, inode_t *node)	335	void fd_node(int fildes, fdi_node_t *node)
336	{	336	{
337	futex_down(&vfs_phone_futex);	337	futex_down(&vfs_phone_futex);
338	async_serialize_start();	338	async_serialize_start();
339	vfs_connect();	339	vfs_connect();
340		340
341	ipcarg_t fs_handle;	341	ipcarg_t fs_handle;
342	ipcarg_t dev_handle;	342	ipcarg_t dev_handle;
343	ipcarg_t index;	343	ipcarg_t index;
344	ipcarg_t rc = async_req_1_3(vfs_phone, VFS_NODE, fildes, &fs_handle,	344	ipcarg_t rc = async_req_1_3(vfs_phone, VFS_NODE, fildes, &fs_handle,
345	&dev_handle, &index);	345	&dev_handle, &index);
346		346
347	async_serialize_end();	347	async_serialize_end();
348	futex_up(&vfs_phone_futex);	348	futex_up(&vfs_phone_futex);
349		349
350	if (rc == EOK) {	350	if (rc == EOK) {
351	node->fs_handle = (fs_handle_t) fs_handle;	351	node->fs_handle = (fs_handle_t) fs_handle;
352	node->dev_handle = (dev_handle_t) dev_handle;	352	node->dev_handle = (dev_handle_t) dev_handle;
353	node->index = (fs_index_t) index;	353	node->index = (fs_index_t) index;
354	} else {	354	} else {
355	node->fs_handle = 0;	355	node->fs_handle = 0;
356	node->dev_handle = 0;	356	node->dev_handle = 0;
357	node->index = 0;	357	node->index = 0;
358	}	358	}
359	}	359	}
360		360
361	int fsync(int fildes)	361	int fsync(int fildes)
362	{	362	{
363	futex_down(&vfs_phone_futex);	363	futex_down(&vfs_phone_futex);
364	async_serialize_start();	364	async_serialize_start();
365	vfs_connect();	365	vfs_connect();
366		366
367	ipcarg_t rc = async_req_1_0(vfs_phone, VFS_SYNC, fildes);	367	ipcarg_t rc = async_req_1_0(vfs_phone, VFS_SYNC, fildes);
368		368
369	async_serialize_end();	369	async_serialize_end();
370	futex_up(&vfs_phone_futex);	370	futex_up(&vfs_phone_futex);
371		371
372	return (int) rc;	372	return (int) rc;
373	}	373	}
374		374
375	off_t lseek(int fildes, off_t offset, int whence)	375	off_t lseek(int fildes, off_t offset, int whence)
376	{	376	{
377	ipcarg_t rc;	377	ipcarg_t rc;
378		378
379	futex_down(&vfs_phone_futex);	379	futex_down(&vfs_phone_futex);
380	async_serialize_start();	380	async_serialize_start();
381	vfs_connect();	381	vfs_connect();
382		382
383	ipcarg_t newoffs;	383	ipcarg_t newoffs;
384	rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence,	384	rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence,
385	&newoffs);	385	&newoffs);
386		386
387	async_serialize_end();	387	async_serialize_end();
388	futex_up(&vfs_phone_futex);	388	futex_up(&vfs_phone_futex);
389		389
390	if (rc != EOK)	390	if (rc != EOK)
391	return (off_t) -1;	391	return (off_t) -1;
392		392
393	return (off_t) newoffs;	393	return (off_t) newoffs;
394	}	394	}
395		395
396	int ftruncate(int fildes, off_t length)	396	int ftruncate(int fildes, off_t length)
397	{	397	{
398	ipcarg_t rc;	398	ipcarg_t rc;
399		399
400	futex_down(&vfs_phone_futex);	400	futex_down(&vfs_phone_futex);
401	async_serialize_start();	401	async_serialize_start();
402	vfs_connect();	402	vfs_connect();
403		403
404	rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length);	404	rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length);
405	async_serialize_end();	405	async_serialize_end();
406	futex_up(&vfs_phone_futex);	406	futex_up(&vfs_phone_futex);
407	return (int) rc;	407	return (int) rc;
408	}	408	}
409		409
410	DIR opendir(const char dirname)	410	DIR opendir(const char dirname)
411	{	411	{
412	DIR *dirp = malloc(sizeof(DIR));	412	DIR *dirp = malloc(sizeof(DIR));
413	if (!dirp)	413	if (!dirp)
414	return NULL;	414	return NULL;
415	dirp->fd = _open(dirname, L_DIRECTORY, 0);	415	dirp->fd = _open(dirname, L_DIRECTORY, 0);
416	if (dirp->fd < 0) {	416	if (dirp->fd < 0) {
417	free(dirp);	417	free(dirp);
418	return NULL;	418	return NULL;
419	}	419	}
420	return dirp;	420	return dirp;
421	}	421	}
422		422
423	struct dirent readdir(DIR dirp)	423	struct dirent readdir(DIR dirp)
424	{	424	{
425	ssize_t len = read(dirp->fd, &dirp->res.d_name[0], NAME_MAX + 1);	425	ssize_t len = read(dirp->fd, &dirp->res.d_name[0], NAME_MAX + 1);
426	if (len <= 0)	426	if (len <= 0)
427	return NULL;	427	return NULL;
428	return &dirp->res;	428	return &dirp->res;
429	}	429	}
430		430
431	void rewinddir(DIR *dirp)	431	void rewinddir(DIR *dirp)
432	{	432	{
433	(void) lseek(dirp->fd, 0, SEEK_SET);	433	(void) lseek(dirp->fd, 0, SEEK_SET);
434	}	434	}
435		435
436	int closedir(DIR *dirp)	436	int closedir(DIR *dirp)
437	{	437	{
438	(void) close(dirp->fd);	438	(void) close(dirp->fd);
439	free(dirp);	439	free(dirp);
440	return 0;	440	return 0;
441	}	441	}
442		442
443	int mkdir(const char *path, mode_t mode)	443	int mkdir(const char *path, mode_t mode)
444	{	444	{
445	ipcarg_t rc;	445	ipcarg_t rc;
446	aid_t req;	446	aid_t req;
447		447
448	size_t pa_size;	448	size_t pa_size;
449	char *pa = absolutize(path, &pa_size);	449	char *pa = absolutize(path, &pa_size);
450	if (!pa)	450	if (!pa)
451	return ENOMEM;	451	return ENOMEM;
452		452
453	futex_down(&vfs_phone_futex);	453	futex_down(&vfs_phone_futex);
454	async_serialize_start();	454	async_serialize_start();
455	vfs_connect();	455	vfs_connect();
456		456
457	req = async_send_1(vfs_phone, VFS_MKDIR, mode, NULL);	457	req = async_send_1(vfs_phone, VFS_MKDIR, mode, NULL);
458	rc = ipc_data_write_start(vfs_phone, pa, pa_size);	458	rc = ipc_data_write_start(vfs_phone, pa, pa_size);
459	if (rc != EOK) {	459	if (rc != EOK) {
460	async_wait_for(req, NULL);	460	async_wait_for(req, NULL);
461	async_serialize_end();	461	async_serialize_end();
462	futex_up(&vfs_phone_futex);	462	futex_up(&vfs_phone_futex);
463	free(pa);	463	free(pa);
464	return (int) rc;	464	return (int) rc;
465	}	465	}
466	async_wait_for(req, &rc);	466	async_wait_for(req, &rc);
467	async_serialize_end();	467	async_serialize_end();
468	futex_up(&vfs_phone_futex);	468	futex_up(&vfs_phone_futex);
469	free(pa);	469	free(pa);
470	return rc;	470	return rc;
471	}	471	}
472		472
473	static int _unlink(const char *path, int lflag)	473	static int _unlink(const char *path, int lflag)
474	{	474	{
475	ipcarg_t rc;	475	ipcarg_t rc;
476	aid_t req;	476	aid_t req;
477		477
478	size_t pa_size;	478	size_t pa_size;
479	char *pa = absolutize(path, &pa_size);	479	char *pa = absolutize(path, &pa_size);
480	if (!pa)	480	if (!pa)
481	return ENOMEM;	481	return ENOMEM;
482		482
483	futex_down(&vfs_phone_futex);	483	futex_down(&vfs_phone_futex);
484	async_serialize_start();	484	async_serialize_start();
485	vfs_connect();	485	vfs_connect();
486		486
487	req = async_send_0(vfs_phone, VFS_UNLINK, NULL);	487	req = async_send_0(vfs_phone, VFS_UNLINK, NULL);
488	rc = ipc_data_write_start(vfs_phone, pa, pa_size);	488	rc = ipc_data_write_start(vfs_phone, pa, pa_size);
489	if (rc != EOK) {	489	if (rc != EOK) {
490	async_wait_for(req, NULL);	490	async_wait_for(req, NULL);
491	async_serialize_end();	491	async_serialize_end();
492	futex_up(&vfs_phone_futex);	492	futex_up(&vfs_phone_futex);
493	free(pa);	493	free(pa);
494	return (int) rc;	494	return (int) rc;
495	}	495	}
496	async_wait_for(req, &rc);	496	async_wait_for(req, &rc);
497	async_serialize_end();	497	async_serialize_end();
498	futex_up(&vfs_phone_futex);	498	futex_up(&vfs_phone_futex);
499	free(pa);	499	free(pa);
500	return rc;	500	return rc;

Subversion Repositories HelenOS

(root)/trunk/uspace/lib/libc/generic/vfs/vfs.c – Rev 4491 → 4492