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_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;
    }
 
    /* 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 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 4280	Rev 4302
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_size = 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 size = str_size(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_size + 1 + size + 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	str_cpy(ncwd_path_nc, cwd_size + 1 + size + 1, cwd_path);	79	str_cpy(ncwd_path_nc, cwd_size + 1 + size + 1, cwd_path);
80	ncwd_path_nc[cwd_size] = '/';	80	ncwd_path_nc[cwd_size] = '/';
81	ncwd_path_nc[cwd_size + 1] = '\0';	81	ncwd_path_nc[cwd_size + 1] = '\0';
82	} else {	82	} else {
83	ncwd_path_nc = malloc(size + 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	str_append(ncwd_path_nc, cwd_size + 1 + size + 1, 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 = str_dup(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, str_size(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_size;	169	size_t mpa_size;
170	char *mpa = absolutize(mp, &mpa_size);	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_size);	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, str_size(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
-		197	/* Ask VFS whether it likes fs_name. */
-		198	rc = async_req_0_0(vfs_phone, IPC_M_PING);
-		199	if (rc != EOK) {
-		200	async_wait_for(req, NULL);
-		201	async_serialize_end();
-		202	futex_up(&vfs_phone_futex);
-		203	free(mpa);
-		204	return (int) rc;
-		205	}
196		206
197	async_wait_for(req, &rc);	207	async_wait_for(req, &rc);
198	async_serialize_end();	208	async_serialize_end();
199	futex_up(&vfs_phone_futex);	209	futex_up(&vfs_phone_futex);
200	free(mpa);	210	free(mpa);
201		211
202	return (int) rc;	212	return (int) rc;
203	}	213	}
204		214
205	static int _open(const char *path, int lflag, int oflag, ...)	215	static int _open(const char *path, int lflag, int oflag, ...)
206	{	216	{
207	ipcarg_t rc;	217	ipcarg_t rc;
208	ipc_call_t answer;	218	ipc_call_t answer;
209	aid_t req;	219	aid_t req;
210		220
211	size_t pa_size;	221	size_t pa_size;
212	char *pa = absolutize(path, &pa_size);	222	char *pa = absolutize(path, &pa_size);
213	if (!pa)	223	if (!pa)
214	return ENOMEM;	224	return ENOMEM;
215		225
216	futex_down(&vfs_phone_futex);	226	futex_down(&vfs_phone_futex);
217	async_serialize_start();	227	async_serialize_start();
218	vfs_connect();	228	vfs_connect();
219		229
220	req = async_send_3(vfs_phone, VFS_OPEN, lflag, oflag, 0, &answer);	230	req = async_send_3(vfs_phone, VFS_OPEN, lflag, oflag, 0, &answer);
221	rc = ipc_data_write_start(vfs_phone, pa, pa_size);	231	rc = ipc_data_write_start(vfs_phone, pa, pa_size);
222	if (rc != EOK) {	232	if (rc != EOK) {
223	async_wait_for(req, NULL);	233	async_wait_for(req, NULL);
224	async_serialize_end();	234	async_serialize_end();
225	futex_up(&vfs_phone_futex);	235	futex_up(&vfs_phone_futex);
226	free(pa);	236	free(pa);
227	return (int) rc;	237	return (int) rc;
228	}	238	}
229	async_wait_for(req, &rc);	239	async_wait_for(req, &rc);
230	async_serialize_end();	240	async_serialize_end();
231	futex_up(&vfs_phone_futex);	241	futex_up(&vfs_phone_futex);
232	free(pa);	242	free(pa);
233		243
234	if (rc != EOK)	244	if (rc != EOK)
235	return (int) rc;	245	return (int) rc;
236	return (int) IPC_GET_ARG1(answer);	246	return (int) IPC_GET_ARG1(answer);
237	}	247	}
238		248
239	int open(const char *path, int oflag, ...)	249	int open(const char *path, int oflag, ...)
240	{	250	{
241	return _open(path, L_FILE, oflag);	251	return _open(path, L_FILE, oflag);
242	}	252	}
243		253
244	int close(int fildes)	254	int close(int fildes)
245	{	255	{
246	ipcarg_t rc;	256	ipcarg_t rc;
247		257
248	futex_down(&vfs_phone_futex);	258	futex_down(&vfs_phone_futex);
249	async_serialize_start();	259	async_serialize_start();
250	vfs_connect();	260	vfs_connect();
251		261
252	rc = async_req_1_0(vfs_phone, VFS_CLOSE, fildes);	262	rc = async_req_1_0(vfs_phone, VFS_CLOSE, fildes);
253		263
254	async_serialize_end();	264	async_serialize_end();
255	futex_up(&vfs_phone_futex);	265	futex_up(&vfs_phone_futex);
256		266
257	return (int)rc;	267	return (int)rc;
258	}	268	}
259		269
260	ssize_t read(int fildes, void *buf, size_t nbyte)	270	ssize_t read(int fildes, void *buf, size_t nbyte)
261	{	271	{
262	ipcarg_t rc;	272	ipcarg_t rc;
263	ipc_call_t answer;	273	ipc_call_t answer;
264	aid_t req;	274	aid_t req;
265		275
266	futex_down(&vfs_phone_futex);	276	futex_down(&vfs_phone_futex);
267	async_serialize_start();	277	async_serialize_start();
268	vfs_connect();	278	vfs_connect();
269		279
270	req = async_send_1(vfs_phone, VFS_READ, fildes, &answer);	280	req = async_send_1(vfs_phone, VFS_READ, fildes, &answer);
271	rc = ipc_data_read_start(vfs_phone, (void *)buf, nbyte);	281	rc = ipc_data_read_start(vfs_phone, (void *)buf, nbyte);
272	if (rc != EOK) {	282	if (rc != EOK) {
273	async_wait_for(req, NULL);	283	async_wait_for(req, NULL);
274	async_serialize_end();	284	async_serialize_end();
275	futex_up(&vfs_phone_futex);	285	futex_up(&vfs_phone_futex);
276	return (ssize_t) rc;	286	return (ssize_t) rc;
277	}	287	}
278	async_wait_for(req, &rc);	288	async_wait_for(req, &rc);
279	async_serialize_end();	289	async_serialize_end();
280	futex_up(&vfs_phone_futex);	290	futex_up(&vfs_phone_futex);
281	if (rc == EOK)	291	if (rc == EOK)
282	return (ssize_t) IPC_GET_ARG1(answer);	292	return (ssize_t) IPC_GET_ARG1(answer);
283	else	293	else
284	return rc;	294	return rc;
285	}	295	}
286		296
287	ssize_t write(int fildes, const void *buf, size_t nbyte)	297	ssize_t write(int fildes, const void *buf, size_t nbyte)
288	{	298	{
289	ipcarg_t rc;	299	ipcarg_t rc;
290	ipc_call_t answer;	300	ipc_call_t answer;
291	aid_t req;	301	aid_t req;
292		302
293	futex_down(&vfs_phone_futex);	303	futex_down(&vfs_phone_futex);
294	async_serialize_start();	304	async_serialize_start();
295	vfs_connect();	305	vfs_connect();
296		306
297	req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer);	307	req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer);
298	rc = ipc_data_write_start(vfs_phone, (void *)buf, nbyte);	308	rc = ipc_data_write_start(vfs_phone, (void *)buf, nbyte);
299	if (rc != EOK) {	309	if (rc != EOK) {
300	async_wait_for(req, NULL);	310	async_wait_for(req, NULL);
301	async_serialize_end();	311	async_serialize_end();
302	futex_up(&vfs_phone_futex);	312	futex_up(&vfs_phone_futex);
303	return (ssize_t) rc;	313	return (ssize_t) rc;
304	}	314	}
305	async_wait_for(req, &rc);	315	async_wait_for(req, &rc);
306	async_serialize_end();	316	async_serialize_end();
307	futex_up(&vfs_phone_futex);	317	futex_up(&vfs_phone_futex);
308	if (rc == EOK)	318	if (rc == EOK)
309	return (ssize_t) IPC_GET_ARG1(answer);	319	return (ssize_t) IPC_GET_ARG1(answer);
310	else	320	else
311	return -1;	321	return -1;
312	}	322	}
313		323
314	off_t lseek(int fildes, off_t offset, int whence)	324	off_t lseek(int fildes, off_t offset, int whence)
315	{	325	{
316	ipcarg_t rc;	326	ipcarg_t rc;
317		327
318	futex_down(&vfs_phone_futex);	328	futex_down(&vfs_phone_futex);
319	async_serialize_start();	329	async_serialize_start();
320	vfs_connect();	330	vfs_connect();
321		331
322	ipcarg_t newoffs;	332	ipcarg_t newoffs;
323	rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence,	333	rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence,
324	&newoffs);	334	&newoffs);
325		335
326	async_serialize_end();	336	async_serialize_end();
327	futex_up(&vfs_phone_futex);	337	futex_up(&vfs_phone_futex);
328		338
329	if (rc != EOK)	339	if (rc != EOK)
330	return (off_t) -1;	340	return (off_t) -1;
331		341
332	return (off_t) newoffs;	342	return (off_t) newoffs;
333	}	343	}
334		344
335	int ftruncate(int fildes, off_t length)	345	int ftruncate(int fildes, off_t length)
336	{	346	{
337	ipcarg_t rc;	347	ipcarg_t rc;
338		348
339	futex_down(&vfs_phone_futex);	349	futex_down(&vfs_phone_futex);
340	async_serialize_start();	350	async_serialize_start();
341	vfs_connect();	351	vfs_connect();
342		352
343	rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length);	353	rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length);
344	async_serialize_end();	354	async_serialize_end();
345	futex_up(&vfs_phone_futex);	355	futex_up(&vfs_phone_futex);
346	return (int) rc;	356	return (int) rc;
347	}	357	}
348		358
349	DIR opendir(const char dirname)	359	DIR opendir(const char dirname)
350	{	360	{
351	DIR *dirp = malloc(sizeof(DIR));	361	DIR *dirp = malloc(sizeof(DIR));
352	if (!dirp)	362	if (!dirp)
353	return NULL;	363	return NULL;
354	dirp->fd = _open(dirname, L_DIRECTORY, 0);	364	dirp->fd = _open(dirname, L_DIRECTORY, 0);
355	if (dirp->fd < 0) {	365	if (dirp->fd < 0) {
356	free(dirp);	366	free(dirp);
357	return NULL;	367	return NULL;
358	}	368	}
359	return dirp;	369	return dirp;
360	}	370	}
361		371
362	struct dirent readdir(DIR dirp)	372	struct dirent readdir(DIR dirp)
363	{	373	{
364	ssize_t len = read(dirp->fd, &dirp->res.d_name[0], NAME_MAX + 1);	374	ssize_t len = read(dirp->fd, &dirp->res.d_name[0], NAME_MAX + 1);
365	if (len <= 0)	375	if (len <= 0)
366	return NULL;	376	return NULL;
367	return &dirp->res;	377	return &dirp->res;
368	}	378	}
369		379
370	void rewinddir(DIR *dirp)	380	void rewinddir(DIR *dirp)
371	{	381	{
372	(void) lseek(dirp->fd, 0, SEEK_SET);	382	(void) lseek(dirp->fd, 0, SEEK_SET);
373	}	383	}
374		384
375	int closedir(DIR *dirp)	385	int closedir(DIR *dirp)
376	{	386	{
377	(void) close(dirp->fd);	387	(void) close(dirp->fd);
378	free(dirp);	388	free(dirp);
379	return 0;	389	return 0;
380	}	390	}
381		391
382	int mkdir(const char *path, mode_t mode)	392	int mkdir(const char *path, mode_t mode)
383	{	393	{
384	ipcarg_t rc;	394	ipcarg_t rc;
385	aid_t req;	395	aid_t req;
386		396
387	size_t pa_size;	397	size_t pa_size;
388	char *pa = absolutize(path, &pa_size);	398	char *pa = absolutize(path, &pa_size);
389	if (!pa)	399	if (!pa)
390	return ENOMEM;	400	return ENOMEM;
391		401
392	futex_down(&vfs_phone_futex);	402	futex_down(&vfs_phone_futex);
393	async_serialize_start();	403	async_serialize_start();
394	vfs_connect();	404	vfs_connect();
395		405
396	req = async_send_1(vfs_phone, VFS_MKDIR, mode, NULL);	406	req = async_send_1(vfs_phone, VFS_MKDIR, mode, NULL);
397	rc = ipc_data_write_start(vfs_phone, pa, pa_size);	407	rc = ipc_data_write_start(vfs_phone, pa, pa_size);
398	if (rc != EOK) {	408	if (rc != EOK) {
399	async_wait_for(req, NULL);	409	async_wait_for(req, NULL);
400	async_serialize_end();	410	async_serialize_end();
401	futex_up(&vfs_phone_futex);	411	futex_up(&vfs_phone_futex);
402	free(pa);	412	free(pa);
403	return (int) rc;	413	return (int) rc;
404	}	414	}
405	async_wait_for(req, &rc);	415	async_wait_for(req, &rc);
406	async_serialize_end();	416	async_serialize_end();
407	futex_up(&vfs_phone_futex);	417	futex_up(&vfs_phone_futex);
408	free(pa);	418	free(pa);
409	return rc;	419	return rc;
410	}	420	}
411		421
412	static int _unlink(const char *path, int lflag)	422	static int _unlink(const char *path, int lflag)
413	{	423	{
414	ipcarg_t rc;	424	ipcarg_t rc;
415	aid_t req;	425	aid_t req;
416		426
417	size_t pa_size;	427	size_t pa_size;
418	char *pa = absolutize(path, &pa_size);	428	char *pa = absolutize(path, &pa_size);
419	if (!pa)	429	if (!pa)
420	return ENOMEM;	430	return ENOMEM;
421		431
422	futex_down(&vfs_phone_futex);	432	futex_down(&vfs_phone_futex);
423	async_serialize_start();	433	async_serialize_start();
424	vfs_connect();	434	vfs_connect();
425		435
426	req = async_send_0(vfs_phone, VFS_UNLINK, NULL);	436	req = async_send_0(vfs_phone, VFS_UNLINK, NULL);
427	rc = ipc_data_write_start(vfs_phone, pa, pa_size);	437	rc = ipc_data_write_start(vfs_phone, pa, pa_size);
428	if (rc != EOK) {	438	if (rc != EOK) {
429	async_wait_for(req, NULL);	439	async_wait_for(req, NULL);
430	async_serialize_end();	440	async_serialize_end();
431	futex_up(&vfs_phone_futex);	441	futex_up(&vfs_phone_futex);
432	free(pa);	442	free(pa);
433	return (int) rc;	443	return (int) rc;
434	}	444	}
435	async_wait_for(req, &rc);	445	async_wait_for(req, &rc);
436	async_serialize_end();	446	async_serialize_end();
437	futex_up(&vfs_phone_futex);	447	futex_up(&vfs_phone_futex);
438	free(pa);	448	free(pa);
439	return rc;	449	return rc;
440	}	450	}
441		451
442	int unlink(const char *path)	452	int unlink(const char *path)
443	{	453	{
444	return _unlink(path, L_NONE);	454	return _unlink(path, L_NONE);
445	}	455	}
446		456
447	int rmdir(const char *path)	457	int rmdir(const char *path)
448	{	458	{
449	return _unlink(path, L_DIRECTORY);	459	return _unlink(path, L_DIRECTORY);
450	}	460	}
451		461
452	int rename(const char old, const char new)	462	int rename(const char old, const char new)
453	{	463	{
454	ipcarg_t rc;	464	ipcarg_t rc;
455	aid_t req;	465	aid_t req;
456		466
457	size_t olda_size;	467	size_t olda_size;
458	char *olda = absolutize(old, &olda_size);	468	char *olda = absolutize(old, &olda_size);
459	if (!olda)	469	if (!olda)
460	return ENOMEM;	470	return ENOMEM;
461		471
462	size_t newa_size;	472	size_t newa_size;
463	char *newa = absolutize(new, &newa_size);	473	char *newa = absolutize(new, &newa_size);
464	if (!newa) {	474	if (!newa) {
465	free(olda);	475	free(olda);
466	return ENOMEM;	476	return ENOMEM;
467	}	477	}
468		478
469	futex_down(&vfs_phone_futex);	479	futex_down(&vfs_phone_futex);
470	async_serialize_start();	480	async_serialize_start();
471	vfs_connect();	481	vfs_connect();
472		482
473	req = async_send_0(vfs_phone, VFS_RENAME, NULL);	483	req = async_send_0(vfs_phone, VFS_RENAME, NULL);
474	rc = ipc_data_write_start(vfs_phone, olda, olda_size);	484	rc = ipc_data_write_start(vfs_phone, olda, olda_size);
475	if (rc != EOK) {	485	if (rc != EOK) {
476	async_wait_for(req, NULL);	486	async_wait_for(req, NULL);
477	async_serialize_end();	487	async_serialize_end();
478	futex_up(&vfs_phone_futex);	488	futex_up(&vfs_phone_futex);
479	free(olda);	489	free(olda);
480	free(newa);	490	free(newa);
481	return (int) rc;	491	return (int) rc;
482	}	492	}
483	rc = ipc_data_write_start(vfs_phone, newa, newa_size);	493	rc = ipc_data_write_start(vfs_phone, newa, newa_size);
484	if (rc != EOK) {	494	if (rc != EOK) {
485	async_wait_for(req, NULL);	495	async_wait_for(req, NULL);
486	async_serialize_end();	496	async_serialize_end();
487	futex_up(&vfs_phone_futex);	497	futex_up(&vfs_phone_futex);
488	free(olda);	498	free(olda);
489	free(newa);	499	free(newa);
490	return (int) rc;	500	return (int) rc;

Subversion Repositories HelenOS

(root)/trunk/uspace/lib/libc/generic/vfs/vfs.c @ 4279 – Rev 4280 → 4302